/* ═══════════════════════════════════════════════════════════════
   STYLES.CSS — Daily Utility Lab (v3: Lab Instrument)
   Design direction: precision, warmth, tactile craft.
   Space Grotesk + DM Sans, Electric Orange, deep warm charcoal.
   No purple gradients. No AI defaults. No plastic.
   ═══════════════════════════════════════════════════════════════ */

/* --- TOKENS --- */
:root {
  /* Palette — warm charcoal base, electric orange accent */
  --color-bg: #171513;
  --color-bg-elevated: #1e1c19;
  --color-bg-subtle: #23211d;
  --color-surface: #1e1c19;
  --color-border: #33302b;
  --color-border-subtle: #2a2723;
  --color-text-primary: #f0ebe3;
  --color-text-secondary: #9a9488;
  --color-text-muted: #6b665c;
  --color-accent: #ff6b2b;
  --color-accent-hover: #ff8a50;
  --color-accent-light: rgba(255,107,43,0.10);
  --color-accent-glow: rgba(255,107,43,0.22);
  --color-success: #34d399;
  --color-error: #f87171;

  /* Shadows — warm-tinted, not pure black */
  --shadow-xs: 0 1px 2px rgba(10,8,6,0.25);
  --shadow-sm: 0 2px 4px rgba(10,8,6,0.3), 0 1px 2px rgba(10,8,6,0.2);
  --shadow-md: 0 4px 12px rgba(10,8,6,0.35), 0 2px 4px rgba(10,8,6,0.2);
  --shadow-lg: 0 12px 24px rgba(10,8,6,0.4), 0 4px 8px rgba(10,8,6,0.2);
  --shadow-xl: 0 24px 48px rgba(10,8,6,0.5), 0 8px 16px rgba(10,8,6,0.25);
  --shadow-card-hover: 0 20px 40px -8px rgba(255,107,43,0.15), 0 8px 16px -4px rgba(10,8,6,0.3);
  --shadow-pressed: inset 0 2px 4px rgba(10,8,6,0.5);
  --shadow-glow: 0 0 20px rgba(255,107,43,0.15), 0 0 60px rgba(255,107,43,0.05);

  /* Typography — Space Grotesk (display), DM Sans (body), JetBrains Mono (code) */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Fira Code', Consolas, monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.5rem;
  --fs-5xl: clamp(3rem, 6vw, 4.5rem);

  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  --lh-tight: 1.1;
  --lh-snug: 1.25;
  --lh-normal: 1.5;
  --lh-relaxed: 1.65;

  --ls-tight: -0.04em;
  --ls-normal: -0.01em;
  --ls-wide: 0.06em;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Easing */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-snap: cubic-bezier(0.22, 0.68, 0, 1.02);

  /* Transitions */
  --transition-fast: 120ms var(--ease-in-out);
  --transition-base: 200ms var(--ease-out);
  --transition-slow: 350ms var(--ease-out);

  /* Layout */
  --container-max: 1100px;
  --header-h: 64px;
}

/* --- LIGHT MODE --- */
[data-theme="light"] {
  --color-bg: #f5f2ed;
  --color-bg-elevated: #ffffff;
  --color-bg-subtle: #ebe7e0;
  --color-surface: #ffffff;
  --color-border: #d6d1c9;
  --color-border-subtle: #e5e1d9;
  --color-text-primary: #1a1714;
  --color-text-secondary: #5c574d;
  --color-text-muted: #9a9488;
  --color-accent: #e55a1f;
  --color-accent-hover: #ff6b2b;
  --color-accent-light: rgba(229,90,31,0.08);
  --color-accent-glow: rgba(229,90,31,0.16);
  --shadow-xs: 0 1px 2px rgba(26,23,20,0.06);
  --shadow-sm: 0 2px 4px rgba(26,23,20,0.08), 0 1px 2px rgba(26,23,20,0.04);
  --shadow-md: 0 4px 12px rgba(26,23,20,0.1), 0 2px 4px rgba(26,23,20,0.05);
  --shadow-lg: 0 12px 24px rgba(26,23,20,0.12), 0 4px 8px rgba(26,23,20,0.05);
  --shadow-xl: 0 24px 48px rgba(26,23,20,0.14), 0 8px 16px rgba(26,23,20,0.06);
  --shadow-card-hover: 0 20px 40px -8px rgba(229,90,31,0.12), 0 8px 16px -4px rgba(26,23,20,0.08);
  --shadow-pressed: inset 0 2px 4px rgba(26,23,20,0.1);
  --shadow-glow: 0 0 20px rgba(229,90,31,0.08), 0 0 60px rgba(229,90,31,0.03);
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + var(--space-8));
}
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font: inherit; border: none; outline: none; background: none; color: inherit; }
::selection { background-color: var(--color-accent); color: #fff; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: var(--radius-sm); }

/* --- GRAIN OVERLAY --- */
.grain-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 180px 180px;
}
[data-theme="light"] .grain-overlay { opacity: 0.02; }

/* --- LAYOUT --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* --- PAGE WRAPPER --- */
.page-wrapper {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.page-wrapper.is-loaded {
  opacity: 1;
  transform: translateY(0);
}

/* --- HEADER --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(23,21,19,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}
[data-theme="light"] .site-header {
  background-color: rgba(245,242,237,0.85);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.site-header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-md);
  letter-spacing: var(--ls-tight);
  transition: opacity var(--transition-fast);
}
.site-header__logo:hover { opacity: 0.7; }
.site-header__logo-icon { width: 40px; height: 40px; color: var(--color-accent); flex-shrink: 0; }
.site-header__logo-sub {
  font-weight: var(--fw-normal);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}
.site-nav__list { display: flex; gap: var(--space-8); }
.site-nav__link {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  letter-spacing: var(--ls-normal);
  transition: color var(--transition-fast);
}
.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}
.site-nav__link:hover, .site-nav__link:focus-visible { color: var(--color-text-primary); }
.site-nav__link:hover::after, .site-nav__link:focus-visible::after { width: 100%; }
.site-header__actions { display: flex; align-items: center; gap: var(--space-3); }

/* --- THEME TOGGLE --- */
.theme-toggle {
  position: relative;
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover { background-color: var(--color-bg-subtle); }
.theme-toggle:active { transform: scale(0.88); }
.theme-toggle__icon {
  position: absolute;
  transition: opacity var(--transition-base), transform 400ms var(--ease-spring);
}
[data-theme="dark"] .theme-toggle__icon--sun { opacity: 1; transform: rotate(0) scale(1); }
[data-theme="dark"] .theme-toggle__icon--moon { opacity: 0; transform: rotate(120deg) scale(0.4); }
[data-theme="light"] .theme-toggle__icon--sun { opacity: 0; transform: rotate(-120deg) scale(0.4); }
[data-theme="light"] .theme-toggle__icon--moon { opacity: 1; transform: rotate(0) scale(1); }

/* --- MOBILE MENU --- */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  padding: 8px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}
.mobile-menu-toggle:hover { background-color: var(--color-bg-subtle); }
.mobile-menu-toggle__bar {
  display: block;
  width: 100%; height: 2px;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.mobile-menu-toggle[aria-expanded="true"] .mobile-menu-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-toggle[aria-expanded="true"] .mobile-menu-toggle__bar:nth-child(2) { opacity: 0; }
.mobile-menu-toggle[aria-expanded="true"] .mobile-menu-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 99;
  background-color: var(--color-bg);
  padding: calc(var(--header-h) + var(--space-8)) var(--space-6) var(--space-8);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  pointer-events: none;
}
.mobile-nav[hidden] { display: block; visibility: hidden; }
.mobile-nav.is-open { visibility: visible; opacity: 1; transform: translateY(0); pointer-events: auto; }
.mobile-nav__list { display: flex; flex-direction: column; gap: var(--space-2); }
.mobile-nav__link {
  display: block;
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  padding: var(--space-4) 0;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast), padding-inline var(--transition-base);
}
.mobile-nav__link:hover { color: var(--color-accent); padding-inline: var(--space-4); }

/* --- HERO --- */
.hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-24) 0 var(--space-20);
  min-height: 80vh;
  display: flex;
  align-items: center;
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
}
.hero__content {
  max-width: 700px;
}
.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-accent);
  letter-spacing: var(--ls-wide);
  text-transform: lowercase;
  margin-bottom: var(--space-6);
  opacity: 0;
}
.hero__heading {
  font-family: var(--font-display);
  font-size: var(--fs-5xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-8);
}
.hero__line {
  display: block;
  overflow: hidden;
}
.hero__word {
  display: inline-block;
  transform: translateY(110%);
}
.hero__word--accent {
  color: var(--color-accent);
}
.hero__subheading {
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-12);
  transition: color var(--transition-slow);
  opacity: 0;
  transform: translateY(16px);
}

/* Hero Search — "Lab Instrument" */
.hero__search-wrapper {
  position: relative;
  max-width: 480px;
  opacity: 0;
  transform: translateY(16px);
}
.hero__search-icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
  transition: color var(--transition-fast);
}
.hero__search-input {
  width: 100%;
  height: 56px;
  padding: 0 var(--space-12) 0 var(--space-12);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-elevated);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow 300ms var(--ease-out), background-color var(--transition-slow), transform 300ms var(--ease-out);
}
.hero__search-input::placeholder { color: var(--color-text-muted); }
.hero__search-input:hover {
  border-color: var(--color-text-muted);
  transform: scale(1.005);
}
.hero__search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-glow), var(--shadow-glow);
  outline: none;
  transform: scale(1.01);
}
.hero__search-input:focus ~ .hero__search-icon { color: var(--color-accent); }
.hero__search-kbd {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  pointer-events: none;
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

/* Heading accent — solid color, no gradient */
.hero__heading-accent {
  color: var(--color-accent);
}

/* Hero Decorative Grid Lines */
.hero__decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.04;
}
.hero__grid-lines {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 var(--space-12);
}
.hero__grid-lines span {
  width: 1px;
  height: 100%;
  background: var(--color-text-secondary);
}
[data-theme="light"] .hero__decor { opacity: 0.06; }

/* --- SECTIONS --- */
.tools-section { padding: var(--space-16) 0 var(--space-24); }
.section-header { margin-bottom: var(--space-12); }
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--color-accent);
  letter-spacing: var(--ls-wide);
  text-transform: lowercase;
  margin-bottom: var(--space-3);
}
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-3);
}
.section-subheading {
  color: var(--color-text-secondary);
  font-size: var(--fs-md);
  transition: color var(--transition-slow);
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

/* --- TOOL CARDS --- */
.tool-card {
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: transform 300ms var(--ease-out), box-shadow 300ms var(--ease-out), border-color 300ms var(--ease-out);
  will-change: transform;
}
/* Subtle inner border — "lab glass" effect */
.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255,255,255,0.03);
  pointer-events: none;
}
[data-theme="light"] .tool-card::before {
  border-color: rgba(255,255,255,0.5);
}
/* Noise texture on cards */
.tool-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0.015;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}
/* Hover lift: CSS fallback; GSAP refines when available */
.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
}
.tool-card__link {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-7);
  position: relative;
  z-index: 1;
}
.tool-card__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: var(--radius-lg);
}
.tool-card__icon-wrap {
  flex-shrink: 0;
  width: 56px; height: 56px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  transition: background-color 300ms var(--ease-spring), color 300ms var(--ease-spring), transform 300ms var(--ease-spring), box-shadow 300ms var(--ease-out);
}
.tool-card:hover .tool-card__icon-wrap {
  transform: scale(1.08) rotate(12deg);
  background-color: var(--color-accent);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(255,107,43,0.3);
}
.tool-card__body { flex: 1; min-width: 0; }
.tool-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-1);
  transition: color var(--transition-fast);
}
.tool-card:hover .tool-card__title { color: var(--color-accent); }
.tool-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-normal);
  transition: color var(--transition-slow);
}
.tool-card__arrow {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: color 300ms var(--ease-out), transform 300ms var(--ease-spring);
}
.tool-card:hover .tool-card__arrow {
  color: var(--color-accent);
  transform: translateX(6px);
}

/* --- ABOUT --- */
.about-section {
  padding: var(--space-24) 0;
  background-color: var(--color-bg-subtle);
  transition: background-color var(--transition-slow);
}
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-16);
  align-items: start;
}
.about-sticky {
  position: sticky;
  top: calc(var(--header-h) + var(--space-12));
}
.about-heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-tight);
}
.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.about-content p {
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  transition: color var(--transition-slow);
}
.about-content strong {
  color: var(--color-text-primary);
  font-weight: var(--fw-semibold);
  transition: color var(--transition-slow);
}

/* --- FAQ --- */
.faq-section { padding: var(--space-20) 0 var(--space-24); }
.faq-section .section-header { margin-bottom: var(--space-12); }
.faq-list {
  max-width: 720px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-elevated);
  transition: border-color 200ms var(--ease-out), background-color 200ms var(--ease-out), box-shadow 300ms var(--ease-out);
  overflow: hidden;
}
.faq-item[open] {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  cursor: pointer;
  list-style: none;
  transition: background-color 200ms var(--ease-out);
}
.faq-item__question::-webkit-details-marker { display: none; }
.faq-item__question::marker { display: none; content: ''; }
.faq-item__question:hover { background-color: var(--color-bg-subtle); }
.faq-item__question h3 {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  margin: 0;
}
/* Custom plus/minus icon */
.faq-item__icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
  transition: background-color 200ms var(--ease-out), color 200ms var(--ease-out), transform 300ms var(--ease-spring);
}
.faq-item__icon .faq-icon-minus { display: none; }
.faq-item[open] .faq-item__icon {
  background-color: var(--color-accent);
  color: #ffffff;
  transform: rotate(45deg);
}
.faq-item[open] .faq-item__icon .faq-icon-plus { display: none; }
.faq-item[open] .faq-item__icon .faq-icon-minus { display: block; }
.faq-item__answer {
  padding: 0 var(--space-6) var(--space-6);
}
.faq-item[open] .faq-item__answer {
  animation: faq-answer-in 420ms var(--ease-snap);
}
@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.faq-item__answer p {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin: 0;
  transition: color var(--transition-slow);
}

/* --- FOOTER --- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0;
  transition: border-color var(--transition-slow);
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.site-footer__copy {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  transition: color var(--transition-slow);
}
.site-footer__list { display: flex; gap: var(--space-6); flex-wrap: wrap; }
.site-footer__link {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.site-footer__link:hover { color: var(--color-accent); }

/* --- COOKIE BANNER --- */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 200;
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 24px rgba(0,0,0,0.15);
  transform: translateY(0);
  transition: transform var(--transition-slow), background-color var(--transition-slow), opacity var(--transition-slow);
}
.cookie-banner.is-hidden { transform: translateY(100%); opacity: 0; pointer-events: none; }
.cookie-banner__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.cookie-banner__text {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-slow);
}
.cookie-banner__link {
  color: var(--color-accent);
  font-weight: var(--fw-medium);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.cookie-banner__link:hover { color: var(--color-accent-hover); }
.cookie-banner__btn {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: #171513;
  background-color: var(--color-accent);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.cookie-banner__btn:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}
.cookie-banner__btn:active {
  transform: scale(0.95);
  box-shadow: var(--shadow-pressed);
}

/* ═══ PROMO RIBBON ═══ */
.promo-ribbon {
  background: var(--color-accent);
  color: #171513;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  padding: var(--space-2) var(--space-12) var(--space-2) var(--space-6);
  position: relative;
  z-index: 101;
  transition: transform var(--transition-slow), opacity var(--transition-slow), max-height var(--transition-slow);
  max-height: 60px;
  overflow: hidden;
}
.promo-ribbon.is-hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  max-height: 0;
  padding: 0;
}
.promo-ribbon__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.promo-ribbon__text {
  text-align: center;
  width: 100%;
}
.promo-ribbon__link {
  display: inline-block;
  font-weight: var(--fw-bold);
  color: #171513;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  margin-left: var(--space-1);
  transition: opacity var(--transition-fast), text-decoration-color var(--transition-fast);
}
.promo-ribbon__link:hover {
  opacity: 0.7;
  text-decoration-color: transparent;
}
.promo-ribbon__close {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  color: #171513;
  background-color: rgba(0,0,0,0.1);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}
.promo-ribbon__close:hover {
  background-color: rgba(0,0,0,0.2);
}

/* ═══ POST-COMPRESSION CTA ═══ */
.post-cta {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  background-color: var(--color-bg-elevated);
  border: 1.5px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}
.post-cta:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.post-cta[hidden] { display: none; }
.post-cta__icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background-color: rgba(52,211,153,0.1);
  color: var(--color-success);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}
.post-cta__content { flex: 1; min-width: 0; }
.post-cta__heading {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-2);
}
.post-cta__desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin: 0;
  transition: color var(--transition-slow);
}
.post-cta__link {
  color: var(--color-accent);
  font-weight: var(--fw-semibold);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.post-cta__link:hover { color: var(--color-accent-hover); }
.post-cta__btn {
  flex-shrink: 0;
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: #171513;
  background-color: var(--color-accent);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.post-cta__btn:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}
.post-cta__btn:active {
  transform: scale(0.96);
  box-shadow: var(--shadow-pressed);
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .promo-ribbon__text { font-size: var(--fs-xs); }
  .promo-ribbon__close { right: var(--space-2); width: 28px; height: 28px; }
  .promo-ribbon { padding: var(--space-2) var(--space-10) var(--space-2) var(--space-4); }
  .post-cta {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }
  .post-cta__icon { margin: 0 auto; }
  .post-cta__btn { justify-content: center; }
  .site-nav { display: none; }
  .mobile-menu-toggle { display: flex; }
  .tools-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .hero { padding: var(--space-16) 0 var(--space-12); min-height: auto; }
  .hero__heading { font-size: clamp(2.25rem, 8vw, 3rem); }
  .hero__subheading { font-size: var(--fs-base); }
  .tool-card__link { padding: var(--space-5); gap: var(--space-4); }
  .tool-card__icon-wrap { width: 48px; height: 48px; }
  .tool-card__icon-wrap svg { width: 24px; height: 24px; }
  .tools-section, .faq-section { padding: var(--space-12) 0; }
  .about-section { padding: var(--space-16) 0; }
  .about-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .about-sticky {
    position: static;
  }
  .about-heading { font-size: clamp(1.5rem, 5vw, 2rem); }
}
@media (max-width: 480px) {
  .container { padding-inline: var(--space-4); }
  .tool-card__link { padding: var(--space-4); }
  .site-footer__inner { flex-direction: column; text-align: center; }
  .site-footer__list { justify-content: center; }
  .cookie-banner__inner { flex-direction: column; text-align: center; }
  .hero__search-kbd { display: none; }
  .hero__heading { font-size: clamp(1.75rem, 8vw, 2.25rem); }
}

/* --- REDUCED MOTION --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .page-wrapper { opacity: 1; transform: none; }
  .hero__word { transform: none; }
  .hero__eyebrow, .hero__subheading, .hero__search-wrapper { opacity: 1; transform: none; }
  .tool-card:hover { transform: none; }
  .tool-card:hover .tool-card__icon-wrap { transform: none; }
  .tool-card:hover .tool-card__arrow { transform: none; }
}

/* --- PRINT --- */
@media print {
  .site-header, .cookie-banner, .hero__decor, .theme-toggle, .grain-overlay { display: none; }
  body { background: #fff; color: #000; }
  .tool-card { break-inside: avoid; border: 1px solid #ccc; }
}

/* === INNER PAGES === */

/* Legal pages */
.legal-page { padding: var(--space-16) 0 var(--space-20); }
.legal-page__inner { max-width: 720px; }
.legal-page__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  transition: color var(--transition-slow);
}
.legal-page__breadcrumb a {
  color: var(--color-accent);
  transition: opacity var(--transition-fast);
}
.legal-page__breadcrumb a:hover { opacity: 0.7; }
.legal-page__heading {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-2);
}
.legal-page__subheading {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-10);
  transition: color var(--transition-slow);
}
.legal-page__updated {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-10);
  transition: color var(--transition-slow);
}
.legal-page__content h2 {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}
.legal-page__content p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  transition: color var(--transition-slow);
}
.legal-page__content ul { margin-bottom: var(--space-4); padding-left: var(--space-6); }
.legal-page__content li {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  list-style: disc;
  transition: color var(--transition-slow);
}
.legal-page__content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.legal-page__content a:hover { color: var(--color-accent-hover); }
.legal-page__content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-subtle);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-slow);
}
.legal-page__content strong {
  color: var(--color-text-primary);
  font-weight: var(--fw-semibold);
  transition: color var(--transition-slow);
}
.legal-page__content em { font-style: italic; }

/* Contact page */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-bottom: var(--space-16); }
.contact-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-elevated);
  transition: border-color var(--transition-fast), background-color var(--transition-slow), transform var(--transition-base), box-shadow var(--transition-base);
}
.contact-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.contact-card__icon {
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}
.contact-card__title { font-family: var(--font-display); font-size: var(--fs-md); font-weight: var(--fw-semibold); margin-bottom: var(--space-2); }
.contact-card__detail {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-normal);
  margin-bottom: var(--space-3);
  transition: color var(--transition-slow);
}
.contact-card__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.contact-card__link:hover { color: var(--color-accent-hover); }

.contact-form-section { max-width: 720px; margin: 0 auto; }
.contact-form-section .section-heading { margin-bottom: var(--space-8); }
.contact-form { display: flex; flex-direction: column; gap: var(--space-5); }
.contact-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.contact-form__field { display: flex; flex-direction: column; gap: var(--space-2); }
.contact-form__label {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-primary);
  transition: color var(--transition-slow);
}
.contact-form__input, .contact-form__textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-elevated);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}
.contact-form__input::placeholder, .contact-form__textarea::placeholder { color: var(--color-text-muted); }
.contact-form__input:hover, .contact-form__textarea:hover { border-color: var(--color-text-muted); }
.contact-form__input:focus, .contact-form__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px var(--color-accent-glow);
}
.contact-form__textarea { resize: vertical; min-height: 140px; line-height: var(--lh-normal); }
.contact-form__submit {
  align-self: flex-start;
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: #171513;
  background-color: var(--color-accent);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.contact-form__submit:hover {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}
.contact-form__submit:active {
  transform: scale(0.96);
  box-shadow: var(--shadow-pressed);
}

/* Error page */
.error-page { padding: var(--space-24) 0; text-align: center; }
.error-page__inner { max-width: 480px; margin: 0 auto; }
.error-page__code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.error-page__heading { font-family: var(--font-display); font-size: var(--fs-2xl); font-weight: var(--fw-bold); margin-bottom: var(--space-4); }
.error-page__desc {
  font-size: var(--fs-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  transition: color var(--transition-slow);
}
.error-page__cta {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: #171513;
  background-color: var(--color-accent);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.error-page__cta:hover { background-color: var(--color-accent-hover); box-shadow: var(--shadow-md); }
.error-page__cta:active { transform: scale(0.96); box-shadow: var(--shadow-pressed); }

/* Empty state */
.tools-grid--empty { display: flex; justify-content: center; }
.empty-state {
  text-align: center;
  max-width: 480px;
  padding: var(--space-12) var(--space-6);
}
.empty-state__icon {
  width: 80px; height: 80px;
  display: grid;
  place-items: center;
  margin: 0 auto var(--space-6);
  border-radius: var(--radius-xl);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  transition: background-color var(--transition-slow), color var(--transition-slow), transform 400ms var(--ease-spring);
}
.empty-state:hover .empty-state__icon { transform: rotate(15deg) scale(1.05); }
.empty-state__title { font-family: var(--font-display); font-size: var(--fs-xl); font-weight: var(--fw-bold); margin-bottom: var(--space-3); }
.empty-state__desc {
  font-size: var(--fs-base);
  color: var(--color-text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-4);
  transition: color var(--transition-slow);
}
.empty-state__note {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}
.empty-state__link {
  color: var(--color-accent);
  font-weight: var(--fw-medium);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.empty-state__link:hover { color: var(--color-accent-hover); }

/* Staggered reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
  .contact-form__row { grid-template-columns: 1fr; }
}

/* === IMAGE SIZE REDUCER TOOL === */

.tool-hero {
  padding: var(--space-8) 0 var(--space-6);
}
.tool-hero__heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-3);
}
.tool-hero__subheading {
  font-size: var(--fs-md);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: 0;
  transition: color var(--transition-slow);
}

.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-16) var(--space-8);
  text-align: center;
  cursor: pointer;
  background-color: var(--color-bg-elevated);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  margin-bottom: var(--space-8);
}
.upload-zone:hover,
.upload-zone.is-dragging {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  box-shadow: 0 0 0 4px var(--color-accent-glow);
}
.upload-zone:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.upload-zone__icon {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  transition: color var(--transition-fast), transform 300ms var(--ease-spring);
}
.upload-zone:hover .upload-zone__icon {
  color: var(--color-accent);
  transform: translateY(-4px);
}
.upload-zone__title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-2);
}
.upload-zone__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}

.compressor-controls {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-8);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}
.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.control-label {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  transition: color var(--transition-slow);
}

.size-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.size-preset {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.size-preset:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-accent-light);
}
.size-preset.is-active {
  border-color: var(--color-accent);
  background-color: var(--color-accent);
  color: #171513;
  box-shadow: 0 2px 8px rgba(255,107,43,0.3);
}

.custom-size {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
}
.control-input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}
.control-input::placeholder { color: var(--color-text-muted); }
.control-input:hover { border-color: var(--color-text-muted); }
.control-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.control-unit {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color var(--transition-slow);
}

.slider-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.quality-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-bg-subtle);
  outline: none;
  transition: background var(--transition-slow);
}
.quality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(255,107,43,0.4);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.quality-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 3px 10px rgba(255,107,43,0.5);
}
.quality-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(255,107,43,0.4);
}
.slider-output {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-accent);
  min-width: 42px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.control-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}

.dimensions-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.dimension-field {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.dimension-field .control-input { width: 100%; }
.aspect-lock {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}
.aspect-lock:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.aspect-lock.is-locked {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}
.aspect-lock .lock-closed { display: none; }
.aspect-lock .lock-open { display: block; }
.aspect-lock.is-locked .lock-closed { display: block; }
.aspect-lock.is-locked .lock-open { display: none; }

.control-select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}
.control-select:hover { border-color: var(--color-text-muted); }
.control-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.controls-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn--primary {
  color: #171513;
  background-color: var(--color-accent);
}
.btn--primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}
.btn--primary:active:not(:disabled) {
  transform: scale(0.96);
  box-shadow: var(--shadow-pressed);
}
.btn--ghost {
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
  background-color: transparent;
}
.btn--ghost:hover:not(:disabled) {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
  background-color: var(--color-bg-subtle);
}
.btn--sm {
  font-size: var(--fs-xs);
  padding: var(--space-1) var(--space-3);
}
.btn--lg {
  font-size: var(--fs-base);
  padding: var(--space-3) var(--space-8);
}

.progress-bar-wrap {
  margin-bottom: var(--space-6);
}
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-2);
  transition: background-color var(--transition-slow);
}
.progress-bar__fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent), #ff9a5c);
  border-radius: var(--radius-full);
  transition: width 300ms var(--ease-out);
}
.progress-text {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  text-align: center;
  transition: color var(--transition-slow);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.result-card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}
.result-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.result-card__preview-wrap {
  width: 100%;
  aspect-ratio: 4/3;
  background-color: var(--color-bg-subtle);
  display: grid;
  place-items: center;
  overflow: hidden;
  transition: background-color var(--transition-slow);
}
.result-card__preview {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.result-card__info {
  padding: var(--space-4);
}
.result-card__name {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: var(--space-1);
}
.result-card__sizes {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-1);
}
.result-card__original {
  color: var(--color-text-muted);
  text-decoration: line-through;
}
.result-card__compressed {
  color: var(--color-accent);
  font-weight: var(--fw-semibold);
}
.result-card__dims {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}
.result-card__actions {
  padding: 0 var(--space-4) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.result-card__badge {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background-color: var(--color-bg-subtle);
  color: var(--color-text-muted);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}
.result-card__badge--done {
  background-color: rgba(52,211,153,0.12);
  color: var(--color-success);
}
.result-card__badge--error {
  background-color: rgba(248,113,113,0.12);
  color: var(--color-error);
}

.batch-actions {
  text-align: center;
  margin-bottom: var(--space-8);
}

.seo-content {
  padding: var(--space-16) 0 var(--space-20);
  background-color: var(--color-bg-subtle);
  transition: background-color var(--transition-slow);
}
.seo-content__inner {
  max-width: 720px;
  margin: 0 auto;
}
.seo-content__inner h2 {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}
.seo-content__inner h2:first-child { margin-top: 0; }
.seo-content__inner p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  transition: color var(--transition-slow);
}
.seo-content__inner ul {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}
.seo-content__inner li {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  list-style: disc;
  transition: color var(--transition-slow);
}
.seo-content__inner strong {
  color: var(--color-text-primary);
  font-weight: var(--fw-semibold);
  transition: color var(--transition-slow);
}

/* OCR tool — Image to Text */
#ocr-controls .controls-grid .control-group {
  grid-column: 1 / -1;
}
.ocr-results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.ocr-card {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow);
}
.ocr-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.ocr-card__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
}
.ocr-card__thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-subtle);
  flex-shrink: 0;
}
.ocr-card__meta {
  min-width: 0;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.ocr-card__meta .result-card__name {
  margin-bottom: 0;
}
.ocr-card__body {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.ocr-card__text {
  width: 100%;
  min-height: 140px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow), color var(--transition-slow);
}
.ocr-card__text::placeholder {
  color: var(--color-text-muted);
}
.ocr-card__text:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.ocr-card__actions {
  display: flex;
  gap: var(--space-2);
}
.ocr-card__actions .btn {
  flex: 1;
  justify-content: center;
}
.batch-actions__row {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* Responsive — Tool */
@media (max-width: 768px) {
  .controls-grid { grid-template-columns: 1fr; }
  .compressor-controls { padding: var(--space-5); }
  .upload-zone { padding: var(--space-10) var(--space-5); }
  .results-grid { grid-template-columns: 1fr; }
  .ocr-results { grid-template-columns: 1fr; }
  .controls-actions { flex-direction: column; }
  .controls-actions .btn { width: 100%; justify-content: center; }
  .dimensions-row { flex-wrap: wrap; }
  .aspect-lock { width: 100%; }
}
@media (max-width: 480px) {
  .size-presets { gap: var(--space-1); }
  .size-preset { padding: var(--space-1) var(--space-2); font-size: 0.7rem; }
  .slider-row { flex-direction: column; align-items: stretch; }
  .slider-output { text-align: left; }
}


/* === BLURRED IMAGE TO TEXT TOOL === */

.blur-preset-row {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}
.blur-preset-row .control-label {
  margin-bottom: 0;
  width: 100%;
}
.blur-presets {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.blur-preset {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: var(--space-2) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  background-color: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}
.blur-preset:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}
.blur-preset.is-active {
  border-color: var(--color-accent);
  background-color: var(--color-accent-glow);
  color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.blur-preview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.blur-preview-pane {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}
.blur-preview-pane__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
}
.blur-preview-pane__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}
.blur-preview-pane__badge {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background-color: rgba(52,211,153,0.12);
  color: var(--color-success);
}
.blur-preview-pane__canvas-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg-subtle);
  background-image:
    linear-gradient(45deg, var(--color-border-subtle) 25%, transparent 25%),
    linear-gradient(-45deg, var(--color-border-subtle) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--color-border-subtle) 75%),
    linear-gradient(-45deg, transparent 75%, var(--color-border-subtle) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.blur-preview-pane__canvas-wrap canvas,
.blur-preview-pane__canvas-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}
.blur-preview-pane__empty {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-4);
}

.blur-result-wrap {
  margin-bottom: var(--space-6);
}
.blur-result-wrap .control-label {
  display: block;
  margin-bottom: var(--space-2);
}
.blur-result-text {
  display: block;
  width: 100%;
  min-height: 180px;
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow), color var(--transition-slow);
}
.blur-result-text::placeholder { color: var(--color-text-muted); }
.blur-result-text:hover { border-color: var(--color-text-muted); }
.blur-result-text:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.blur-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* Blog list cards */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
}
.blog-card {
  display: block;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-decoration: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-slow), transform var(--transition-fast);
}
.blog-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.blog-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
.blog-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
  line-height: var(--lh-tight);
  transition: color var(--transition-fast);
}
.blog-card__desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  transition: color var(--transition-slow);
}
.blog-card__more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-accent);
}

/* Blog article hero meta */
.blog-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-slow);
}
.blog-meta__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-text-muted);
}

/* Related links box inside SEO content */
.related-box {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-top: var(--space-8);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}
.related-box__heading {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-4);
}
.related-box__list {
  list-style: none;
  padding-left: 0;
  display: grid;
  gap: var(--space-2);
}
.related-box__list li {
  list-style: none;
  margin-bottom: 0;
}
.related-box__list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-accent);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  text-decoration: none;
  transition: color var(--transition-fast), gap var(--transition-fast);
}
.related-box__list a::before {
  content: '->';
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}
.related-box__list a:hover {
  color: var(--color-text-primary);
  gap: var(--space-3);
}

/* CTA banner inside blog/tool content */
.inline-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  background: linear-gradient(135deg, rgba(255,107,43,0.1), rgba(255,107,43,0.02));
  border: 1px solid rgba(255,107,43,0.3);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-top: var(--space-8);
  transition: border-color var(--transition-slow);
}
.inline-cta__content { flex: 1; min-width: 240px; }
.inline-cta__heading {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}
.inline-cta__desc {
  font-size: var(--fs-sm);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
}
.inline-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background-color: var(--color-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.inline-cta__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,43,0.35);
}

/* Responsive — Blur tool + Blog */
@media (max-width: 768px) {
  .blur-preview-grid { grid-template-columns: 1fr; }
  .blur-result-actions { flex-direction: column; }
  .blur-result-actions .btn { width: 100%; justify-content: center; }
  .blog-grid { grid-template-columns: 1fr; }
  .inline-cta { flex-direction: column; align-items: stretch; text-align: center; }
  .inline-cta__btn { justify-content: center; }
}
@media (max-width: 480px) {
  .blur-presets { gap: var(--space-1); }
  .blur-preset { padding: var(--space-1) var(--space-3); }
}

/* === STAIR CALCULATOR TOOL === */

.stair-calc { padding: var(--space-6) 0 var(--space-16); }
.stair-calc__grid {
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  gap: var(--space-6);
  align-items: start;
}
.stair-panel { margin-bottom: 0; }
.stair-panel .controls-actions {
  flex-wrap: wrap;
}
.stair-panel .controls-actions .btn {
  flex: 1 1 auto;
  justify-content: center;
  min-width: 0;
}
.stair-panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.stair-panel__head .section-eyebrow { margin-bottom: 0; }
.unit-toggle { display: flex; gap: var(--space-2); }

.control-label__req { color: var(--color-accent); }

/* Full-width control group (Top Mount) */
.control-group--full { grid-column: 1 / -1; }

/* Mount toggle */
.mount-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}
.mount-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: left;
  min-width: 0;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}
.mount-btn__sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: var(--fw-normal);
  color: var(--color-text-muted);
  line-height: 1.3;
  white-space: normal;
  word-break: normal;
  overflow-wrap: normal;
}
.mount-btn:hover { border-color: var(--color-text-muted); color: var(--color-text-primary); }
.mount-btn.is-active {
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.mount-btn.is-active .mount-btn__sub { color: var(--color-accent); opacity: 0.85; }

/* Advanced details */
.advanced-details {
  margin-top: var(--space-5);
  border-top: 1px solid var(--color-border-subtle);
  padding-top: var(--space-4);
}
.advanced-details__summary {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  list-style: none;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  transition: color var(--transition-fast);
}
.advanced-details__summary::-webkit-details-marker { display: none; }
.advanced-details__summary:hover { color: var(--color-accent); }
.advanced-details__grid { margin-top: var(--space-5); }

/* Results column */
.stair-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-width: 0;
}

/* Code badges */
.code-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.code-badge {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-elevated);
  color: var(--color-text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.code-badge--pass {
  border-color: rgba(52,211,153,0.35);
  background-color: rgba(52,211,153,0.12);
  color: var(--color-success);
}
.code-badge--fail {
  border-color: rgba(248,113,113,0.35);
  background-color: rgba(248,113,113,0.12);
  color: var(--color-error);
}
.code-badge--warn {
  border-color: rgba(255,107,43,0.4);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

/* Stat tiles */
.stair-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--space-3);
}
.stat-tile {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: border-color var(--transition-fast), background-color var(--transition-slow);
}
.stat-tile:hover { border-color: var(--color-accent); }
.stat-tile--accent {
  border-color: rgba(255,107,43,0.35);
  background: linear-gradient(160deg, rgba(255,107,43,0.08), transparent 70%);
}
.stat-tile__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-text-muted);
}
.stat-tile__value {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}
.stat-tile--accent .stat-tile__value { color: var(--color-accent); }
.stat-tile__note {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.35;
}

/* Error */
.stair-error {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-error);
  background-color: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.35);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

/* Diagram */
.stair-diagram,
.cut-list {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}
.stair-diagram__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.stair-diagram__title {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
}
.stair-diagram__hint {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}
.stair-diagram__canvas {
  width: 100%;
  min-height: 280px;
  overflow: hidden;
}
.stair-diagram__canvas svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Cut list table */
.cut-list__table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}
.cut-list__table th,
.cut-list__table td {
  padding: var(--space-3) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
  vertical-align: top;
}
.cut-list__table th {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-text-muted);
  font-weight: var(--fw-semibold);
}
.cut-list__table td {
  color: var(--color-text-secondary);
  line-height: var(--lh-normal);
  transition: color var(--transition-slow);
}
.cut-list__table td:first-child {
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  white-space: nowrap;
}
.cut-list__table td:nth-child(2) {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-weight: var(--fw-semibold);
}
.cut-list__table tr:last-child td { border-bottom: none; }

/* SEO content tables */
.seo-content__inner table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0 var(--space-6);
  font-size: var(--fs-sm);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.seo-content__inner th,
.seo-content__inner td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
}
.seo-content__inner th {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-text-muted);
  background-color: var(--color-bg-subtle);
}
.seo-content__inner td { color: var(--color-text-secondary); }
.seo-content__inner td:first-child { color: var(--color-text-primary); font-weight: var(--fw-medium); }
.seo-content__inner tr:last-child td { border-bottom: none; }
.seo-content__inner code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--color-bg-subtle);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* === GROW A GARDEN CALCULATOR TOOL === */

[hidden] { display: none !important; }

.gag-panel[hidden] { display: none; }
.gag-panel { min-width: 0; }

.gag-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: var(--space-6);
  align-items: start;
}

.gag-info {
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}
.gag-info h3 {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--space-3);
}
.gag-info ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.gag-info li {
  position: relative;
  padding-left: var(--space-4);
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  line-height: var(--lh-normal);
}
.gag-info li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}
.gag-info strong { color: var(--color-text-primary); }
.gag-info p { font-size: var(--fs-xs); color: var(--color-text-muted); margin: 0; }
.gag-info a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}
.gag-info a:hover { text-decoration: underline; }

.gag-modes {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.gag-check {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
  transition: color var(--transition-fast);
}
.gag-check:hover { color: var(--color-text-primary); }
.gag-check input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--color-accent);
  cursor: pointer;
  flex-shrink: 0;
}

.gag-radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.gag-results { margin-top: var(--space-5); }
.gag-results:empty { display: none; }
.gag-results .stair-stats { margin-bottom: var(--space-4); }

.gag-verdict-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.gag-verdict-pct {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.gag-verdict-pct.is-win { color: var(--color-success); }
.gag-verdict-pct.is-fair { color: var(--color-accent); }
.gag-verdict-pct.is-lose { color: var(--color-error); }

.gag-result-note {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: var(--lh-normal);
  margin-bottom: var(--space-3);
}

.gag-result-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.quick-answer {
  background-color: var(--color-accent-light);
  border: 1px solid rgba(255,107,43,0.35);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-6);
}
.quick-answer__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}
.quick-answer p {
  font-size: var(--fs-md);
  line-height: var(--lh-normal);
  color: var(--color-text-primary);
  margin: 0;
}
.tool-hero .quick-answer { max-width: 720px; }

.gag-updated {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.glossary-list { margin-bottom: var(--space-6); }
.glossary-list dt {
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  margin-top: var(--space-3);
}
.glossary-list dd {
  margin: 2px 0 0;
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: var(--lh-normal);
}

/* === EV CHARGING COST CALCULATOR === */

.ev-panel-tools {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.ev-currency {
  width: auto;
  min-width: 96px;
}
.mount-toggle--3 {
  grid-template-columns: repeat(3, 1fr);
}
.seo-content__inner ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}
.seo-content__inner ol li {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  list-style: decimal;
  transition: color var(--transition-slow);
}
.seo-content__inner ol li strong { color: var(--color-text-primary); }

/* Responsive — Stair */
@media (max-width: 900px) {
  .stair-calc__grid { grid-template-columns: 1fr; }
  .gag-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .mount-toggle--3 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .mount-toggle { grid-template-columns: 1fr; }
  .stair-stats { grid-template-columns: repeat(2, 1fr); }
  .stair-panel__head { flex-direction: column; align-items: flex-start; }
}

/* === ATTENDANCE & MARKS PERCENTAGE CALCULATOR === */

#att-diagram { min-height: 0; }

.stat-tile__value.is-ok { color: var(--color-success); }
.stat-tile__value.is-bad { color: var(--color-error); }

.subject-rows {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.subject-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-3);
  align-items: end;
  padding: var(--space-3);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-elevated);
}
.subject-row__fields {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3);
  min-width: 0;
}
.subject-row__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.subject-row__remove:hover:not(:disabled) {
  border-color: var(--color-error);
  color: var(--color-error);
}
.subject-row__remove:disabled { opacity: 0.4; cursor: not-allowed; }

@media (max-width: 560px) {
  .subject-row { grid-template-columns: 1fr; }
  .subject-row__fields { grid-template-columns: 1fr; }
  .subject-row__remove { width: 100%; }
}

/* === CPU BOTTLENECK CALCULATOR === */

.stat-tile__value.is-warn { color: var(--color-accent); }

/* === HIDDEN FEE CALCULATOR === */

.hf-subgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  width: 100%;
}
.hf-subgrid .control-group { min-width: 0; }
.hf-subgrid .gag-check { align-self: start; }

.hf-verdict {
  margin: var(--space-4) 0 0;
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-text-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-normal);
}
.hf-verdict:empty { display: none; }

.hf-bar {
  display: flex;
  width: 100%;
  min-height: 36px;
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-subtle);
}
.hf-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 0;
  min-width: 0;
  height: 36px;
  overflow: hidden;
  white-space: nowrap;
  color: #fff;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  transition: width var(--transition-slow);
}
.hf-bar__seg--visible { background-color: var(--color-success); color: #08301f; }
.hf-bar__seg--hidden {
  background-color: var(--color-error);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(0, 0, 0, 0.16) 0 6px,
    rgba(0, 0, 0, 0) 6px 12px
  );
}

.hf-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}
.hf-legend > span { display: inline-flex; align-items: center; gap: var(--space-2); }
.hf-legend__key {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}
.hf-legend__key--visible { background-color: var(--color-success); }
.hf-legend__key--hidden {
  background-color: var(--color-error);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(0, 0, 0, 0.16) 0 3px,
    rgba(0, 0, 0, 0) 3px 6px
  );
}

.hf-tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background-color: var(--color-bg-subtle);
  color: var(--color-success);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  line-height: 1.5;
}
.hf-tag--hidden {
  border-color: rgba(248, 113, 113, 0.45);
  background-color: rgba(248, 113, 113, 0.12);
  color: var(--color-error);
}

@media (max-width: 560px) {
  .hf-subgrid { grid-template-columns: 1fr; }
}

/* Print — blueprint mode */
@media print {
  .site-header, .cookie-banner, .promo-ribbon, .grain-overlay, .theme-toggle,
  .mobile-menu-toggle, .seo-content, .controls-actions, .advanced-details { display: none !important; }
  .page-wrapper { opacity: 1 !important; transform: none !important; }
  .stair-calc { padding: 0; }
  .stair-calc__grid { grid-template-columns: 1fr; }
  .compressor-controls { border: 1px solid #ccc; break-inside: avoid; }
  .stat-tile, .stair-diagram, .cut-list { break-inside: avoid; border-color: #ccc; }
  .stair-diagram__canvas svg { max-height: 360px; }
  body { background: #fff; color: #000; }
  .stat-tile__value, .cut-list__table td:first-child { color: #000; }
  .site-footer { border-color: #ccc; }
}