/* ============================================================
   MERGE PDF — page styles
   Shared layout, proof strip, step ledger and local log live in
   styles.css. This file covers the queue, meter and result only.
   ============================================================ */

.merge-tool { padding-block: clamp(1.5rem, 4vw, 2.5rem); }

.merge-panel .upload-zone {
    margin-bottom: 1rem;
    padding: 2.4rem 1.5rem;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}
.merge-panel.is-processing .upload-zone {
    border-color: var(--color-border);
    background: var(--color-bg-subtle);
    cursor: progress;
    opacity: 0.65;
}
.merge-panel.is-done { border-color: color-mix(in srgb, var(--color-success) 45%, var(--color-border)); }

/* ── Local session status ────────────────────────────────── */
.trust-shield {
    margin-bottom: 1rem;
    padding: 0.7rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.trust-shield__main {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}
.trust-shield__icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    color: var(--color-success);
}
.trust-shield__copy { min-width: 0; }
.trust-shield__text {
    font-size: 0.8125rem;
    line-height: 1.4;
    color: var(--color-text-secondary);
}
.trust-shield__text strong { color: var(--color-text-primary); font-weight: var(--fw-semibold); }
.trust-shield__facts {
    margin-top: 0.1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--color-text-muted);
}
.trust-shield__facts span { color: var(--color-border-strong); }
.trust-shield__state {
    margin-left: auto;
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    white-space: nowrap;
}
.trust-shield__state-working,
.trust-shield__state-done { display: none; }
.trust-shield__state-done { color: var(--color-success); }
.trust-shield.is-processing .trust-shield__state-ready { display: none; }
.trust-shield.is-processing .trust-shield__state-working { display: inline; color: var(--color-accent); }
.trust-shield.is-done .trust-shield__state-ready,
.trust-shield.is-done .trust-shield__state-working { display: none; }
.trust-shield.is-done .trust-shield__state-done { display: inline; }

/* ── File queue ──────────────────────────────────────────── */
.queue-empty {
    margin: 0 0 1rem;
    padding: 0.7rem 0;
    border-top: 1px solid var(--color-border-subtle);
    border-bottom: 1px solid var(--color-border-subtle);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}
.queue-empty strong { color: var(--color-text-secondary); font-weight: var(--fw-medium); }
.queue-empty[hidden] { display: none; }

.queue {
    margin: 0 0 1rem;
    border-top: 1px solid var(--color-border);
}
.queue[hidden] { display: none; }
.queue__item {
    display: grid;
    grid-template-columns: 1.75rem minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.6rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--color-border-subtle);
}
.queue__index {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: left;
    font-variant-numeric: tabular-nums;
}
.queue__body {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}
.queue__name {
    font-size: 0.875rem;
    font-weight: var(--fw-medium);
    color: var(--color-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.queue__meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
}
.queue__meta .queue__pages { color: var(--color-accent); }
.queue__meta .queue__warn { color: var(--color-warning); }
.queue__controls { display: flex; gap: 0.25rem; flex-shrink: 0; }
.queue__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}
.queue__btn:hover:not(:disabled) {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-light);
}
.queue__btn[data-act="remove"]:hover:not(:disabled) {
    color: var(--color-error);
    border-color: var(--color-error);
    background: var(--color-error-bg);
}
.queue__btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── Actions ─────────────────────────────────────────────── */
.merge-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 1rem;
}
.merge-actions .btn { min-height: 44px; }
#btn-merge:disabled { opacity: 0.55; cursor: not-allowed; }

/* ── Proof meter: local bytes vs network bytes ───────────── */
.meter {
    padding: 0.9rem 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.meter__row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
}
.meter__row + .meter__row { margin-top: 0.4rem; }
.meter__label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    color: var(--color-text-muted);
}
.meter__value {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: var(--fw-medium);
    font-variant-numeric: tabular-nums;
}
.meter__value--local { color: var(--color-accent); }
.meter__value--net { color: var(--color-success); }
.meter__track {
    position: relative;
    height: 3px;
    margin: 0.7rem 0;
    background: var(--color-border-subtle);
    overflow: hidden;
}
.meter__bar {
    position: absolute;
    inset: 0 auto 0 0;
    width: 0%;
    background: var(--color-accent);
    transition: width 220ms var(--ease-out);
}

/* ── Result strip ────────────────────────────────────────── */
.merge-result {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
    margin-top: 1rem;
    padding: 0.75rem 0 0.75rem 0.85rem;
    border-left: 2px solid var(--color-success);
    background: var(--color-success-bg);
}
.merge-result[hidden] { display: none; }
.merge-result__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border: 1px solid color-mix(in srgb, var(--color-success) 40%, var(--color-border));
    color: var(--color-success);
    flex-shrink: 0;
}
.merge-result__text {
    flex: 1;
    min-width: 180px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1.55;
    color: var(--color-text-secondary);
    overflow-wrap: anywhere;
}
.merge-result .btn { flex-shrink: 0; }

/* ── How it works ────────────────────────────────────────── */
.merge-steps { padding-block: clamp(2rem, 5vw, 3.5rem); }
.merge-steps .section-header { margin-bottom: 1.5rem; }

@media (max-width: 600px) {
    .queue__item {
        grid-template-columns: 1.75rem minmax(0, 1fr);
        grid-template-areas:
            "index body"
            "index controls";
        row-gap: 0.45rem;
    }
    .queue__index { grid-area: index; }
    .queue__body { grid-area: body; }
    .queue__controls { grid-area: controls; justify-self: start; }
    .queue__btn { width: 44px; height: 44px; }
    .trust-shield__main { align-items: flex-start; flex-wrap: wrap; }
    .trust-shield__state { margin-left: 0; width: 100%; padding-left: 2.4rem; }
    .merge-result { align-items: flex-start; }
    .merge-result .btn { margin-left: 2.2rem; }
}