/* FitPhotoKB — main.css
   Uses CSS logical properties throughout for RTL readiness.
   No hardcoded left/right spacing. */

/* ── Inter variable font — self-hosted, no external request ── */
@font-face {
  font-family: "Inter";
  src: url("/assets/fonts/InterVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  color-scheme: light dark;

  --color-bg:          #ffffff;
  --color-surface:     #f4f7fb;
  --color-border:      #d0dae8;
  --color-text:        #1a2332;
  --color-text-muted:  #5a6a7e;
  --color-accent:      #1a6fc4;
  --color-accent-dark: #145aa0;
  --color-accent-bg:   #e8f0fb;
  --color-success:     #1a7a3c;
  --color-success-bg:  #e6f4ec;
  --color-error:       #b91c1c;
  --color-error-bg:    #fef2f2;
  --color-warn:        #92400e;
  --color-warn-bg:     #fffbeb;
  --color-focus:       #0057b8;

  --font-system: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
                 "Noto Sans", "Noto Sans Devanagari", "Noto Sans Arabic", Arial, sans-serif;

  --radius:   6px;
  --radius-lg: 10px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --max-w:    860px;
  --transition: 150ms ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-system);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-block-size: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Skip link ── */
.skip-link {
  position: absolute;
  inset-block-start: -3rem;
  inset-inline-start: var(--space-md);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius);
  font-weight: 600;
  z-index: 100;
  text-decoration: none;
  transition: inset-block-start var(--transition);
}
.skip-link:focus { inset-block-start: var(--space-md); }

/* ── Focus ── */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius);
}

/* ── Layout ── */
.container {
  inline-size: 100%;
  max-inline-size: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

main { flex: 1; }

/* ── Header ── */
.site-header {
  border-block-end: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  inset-block-start: 0;
  z-index: 10;
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding-block: var(--space-sm);
  flex-wrap: wrap;
}
.site-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
  text-decoration: none;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.site-logo:hover { color: var(--color-accent-dark); }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  flex: 1;
}
.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  white-space: nowrap;
}
.site-nav a:hover { color: var(--color-accent); background: var(--color-accent-bg); }
.site-nav a[aria-current="page"] {
  color: var(--color-accent);
  background: var(--color-accent-bg);
  font-weight: 600;
}

/* ── Language badge (English-only pages) ── */
.lang-badge {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: default;
  user-select: none;
  flex-shrink: 0;
  margin-inline-start: auto;
}

/* ── Language selector ── */
.lang-selector {
  position: relative;
  margin-inline-start: auto;
}
/* Read-only variant for English-only pages — same appearance, not interactive */
.lang-selector--readonly {
  pointer-events: none;
  opacity: 0.75;
}
.lang-selector--readonly summary::after { content: " ▾"; font-size: 0.75em; }
.lang-selector summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--color-text);
  background: var(--color-bg);
  user-select: none;
}
.lang-selector summary::-webkit-details-marker { display: none; }
.lang-selector summary::after { content: " ▾"; font-size: 0.75em; }
.lang-selector[open] summary::after { content: " ▴"; }
.lang-menu {
  position: absolute;
  inset-block-start: calc(100% + 4px);
  inset-inline-end: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-inline-size: 180px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 20;
  padding: var(--space-xs) 0;
}
.lang-menu a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.9rem;
}
.lang-menu a:hover { background: var(--color-accent-bg); color: var(--color-accent); }
.lang-menu a[aria-current="true"] { font-weight: 600; color: var(--color-accent); }

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, #eef4ff 0%, #f8faff 50%, #f0f4ff 100%);
  border-block-end: 1px solid var(--color-border);
  padding-block: var(--space-xl) var(--space-lg);
  text-align: center;
}
.hero h1 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  margin-block-end: var(--space-sm);
  line-height: 1.25;
}
.hero p {
  color: var(--color-text-muted);
  max-inline-size: 560px;
  margin-inline: auto;
  font-size: 1rem;
}
.badge-row {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-block-start: var(--space-md);
}
.local-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--color-success-bg);
  color: var(--color-success);
  border-radius: 999px;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ── Tool state machine ──
   data-state on #tool-container controls visibility.
   Elements with [data-show] are hidden by default.
   They become visible only when data-state matches one of their show values.
*/
#tool-container [data-show] { display: none !important; }

#tool-container[data-state="idle"]        [data-show~="idle"]        { display: block !important; }
#tool-container[data-state="selected"]    [data-show~="selected"]    { display: block !important; }
#tool-container[data-state="compressing"] [data-show~="compressing"] { display: block !important; }
#tool-container[data-state="done"]        [data-show~="done"]        { display: block !important; }

/* btn-row uses flex not block */
#tool-container[data-state="selected"]    .btn-row[data-show~="selected"]    { display: flex !important; }
#tool-container[data-state="compressing"] .btn-row[data-show~="compressing"] { display: flex !important; }
#tool-container[data-state="done"]        .btn-row[data-show~="done"]        { display: flex !important; }

/* ── Tool section ── */
.tool-section {
  padding-block: var(--space-lg);
  background: var(--color-bg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.04), 0 1px 4px rgba(0,0,0,0.03);
  position: relative;
  z-index: 1;
}

/* ── Drop zone ── */
.drop-zone {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  background: var(--color-surface);
  position: relative;
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
  box-shadow: 0 0 0 3px var(--color-accent-bg), inset 0 0 0 1px var(--color-accent);
}
/* Touch devices — tap feedback via JS class since :active disappears before user sees it */
.drop-zone.drop-zone--active {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
  box-shadow: 0 0 0 3px var(--color-accent-bg), inset 0 0 0 1px var(--color-accent);
}
.drop-zone.drop-zone--active .drop-zone-icon { opacity: 1; transform: scale(1.12); }
.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  inline-size: 100%;
  block-size: 100%;
  z-index: 0;
  font-size: 0;
  color: transparent;
}
/* In compact mode collapse input to zero — click is triggered via JS */
.drop-zone--compact input[type="file"] {
  inline-size: 0;
  block-size: 0;
  inset: auto;
  inset-inline-start: 0;
  inset-block-start: 0;
}
/* Expanded state — visual content sits above the invisible file input */
.drop-zone:not(.drop-zone--compact) .drop-zone-icon,
.drop-zone:not(.drop-zone--compact) .drop-zone-btn,
.drop-zone:not(.drop-zone--compact) .drop-zone-hint {
  position: relative;
  z-index: 1;
  pointer-events: none;
}
/* Compact state — normal flex flow, no z-index interference */
.drop-zone--compact .drop-zone-icon,
.drop-zone--compact .drop-zone-btn,
.drop-zone--compact .drop-zone-hint {
  position: static;
  z-index: auto;
  pointer-events: none;
}
.drop-zone-icon {
  display: flex;
  justify-content: center;
  margin-block-end: var(--space-sm);
  color: var(--color-accent);
  opacity: 0.7;
  transition: opacity var(--transition), transform var(--transition);
}
.drop-zone:hover .drop-zone-icon,
.drop-zone.drag-over .drop-zone-icon { opacity: 1; transform: scale(1.12); }
.drop-zone-btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  margin-block-end: var(--space-sm);
  pointer-events: none;
}
.drop-zone-hint { color: var(--color-text-muted); font-size: 0.875rem; }

/* Compact drop zone after file selected */
.icon-compact { display: none; }
.drop-zone--compact .icon-expanded { display: none; }
.drop-zone--compact .icon-compact  { display: block; }
.drop-zone--compact {
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-align: start;
}
.drop-zone--compact .drop-zone-icon {
  inline-size: 1.2rem;
  block-size: 1.2rem;
  margin-block-end: 0;
  flex-shrink: 0;
}
.drop-zone--compact .drop-zone-btn {
  font-size: 0.875rem;
  font-weight: 600;
  background: none;
  color: var(--color-accent);
  padding: 0;
  margin-block-end: 0;
  text-decoration: underline;
}
.drop-zone--compact .drop-zone-hint { display: none; }

/* ── File info ── */
.file-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-sm) var(--space-md);
  align-items: start;
}
.file-info-preview {
  grid-row: 1 / 3;
  inline-size: 80px;
  block-size: 80px;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}
.file-meta { display: flex; flex-direction: column; gap: 2px; }
.file-meta dt { font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.file-meta dd { font-size: 0.9rem; font-weight: 500; }
.file-meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xs) var(--space-md); }

/* ── Settings ── */
.settings-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-block-start: var(--space-md);
}
.settings-card h2 { font-size: 1rem; font-weight: 600; margin-block-end: var(--space-md); }

.settings-section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-text-muted);
  margin-block-end: var(--space-sm);
  margin-block-start: var(--space-lg);
}
.settings-section-label:first-child { margin-block-start: 0; }

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--space-sm);
  margin-block-end: var(--space-md);
}
.preset-btn {
  padding: var(--space-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}
.preset-btn:hover { border-color: var(--color-accent); background: var(--color-accent-bg); }
.preset-btn.active { border-color: var(--color-accent); background: var(--color-accent); color: #fff; }

.custom-target {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  flex-wrap: wrap;
}
.custom-target input[type="text"] {
  flex: 1;
  min-inline-size: 80px;
  max-inline-size: 140px;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
}
.custom-target select {
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
}
.unit-note { font-size: 0.8rem; color: var(--color-text-muted); margin-block-start: var(--space-xs); }

.form-group { margin-block-start: var(--space-md); }
.form-group label { display: block; font-size: 0.9rem; font-weight: 500; margin-block-end: var(--space-xs); }
.form-group select, .form-group input[type="text"], .form-group input[type="color"] {
  inline-size: 100%;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
}
.form-group input[type="color"] { inline-size: 60px; block-size: 38px; padding: 2px; cursor: pointer; }

.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: 0.9rem;
}
.checkbox-label input[type="checkbox"] { inline-size: 18px; block-size: 18px; cursor: pointer; }

.advanced-toggle {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 0.875rem;
  padding: var(--space-xs) 0;
  margin-block-start: var(--space-md);
  text-decoration: underline;
}
.advanced-panel { margin-block-start: var(--space-md); }

/* ── Format selector ── */
.format-row {
  display: flex;
  gap: var(--space-sm);
  margin-block-start: var(--space-md);
  flex-wrap: wrap;
}
.format-option {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  flex: 1;
  min-inline-size: 100px;
  transition: border-color var(--transition), background var(--transition);
}
.format-option:has(input:checked),
.format-option.active {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
}
.format-option input[type="radio"] { display: none; }
.format-option span:first-of-type  { font-weight: 600; font-size: 0.95rem; }
.format-hint { font-size: 0.75rem; color: var(--color-text-muted); }
.format-option:has(input:checked) .format-hint,
.format-option.active .format-hint { color: var(--color-accent); }

.more-formats {
  margin-block-start: var(--space-sm);
}
.more-formats > summary {
  font-size: 0.8rem;
  color: var(--color-accent);
  cursor: pointer;
  list-style: none;
  display: inline-block;
}
.more-formats > summary::-webkit-details-marker { display: none; }
.more-formats-body {
  margin-block-start: var(--space-sm);
  max-inline-size: 100%;
  overflow: hidden;
}
.more-formats-body select {
  inline-size: 100%;
  max-inline-size: 100%;
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  box-sizing: border-box;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 2px solid transparent;
  touch-action: manipulation;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 1px 3px rgba(26,111,196,0.25), 0 4px 12px rgba(26,111,196,0.15);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(26,111,196,0.3), 0 8px 20px rgba(26,111,196,0.18);
}
.btn-primary:active  { transform: translateY(0); box-shadow: 0 1px 3px rgba(26,111,196,0.25); }
.btn-primary:disabled { background: var(--color-border); color: var(--color-text-muted); cursor: not-allowed; box-shadow: none; transform: none; }
.btn-secondary { background: var(--color-bg); color: var(--color-accent); border-color: var(--color-accent); }
.btn-secondary:hover { background: var(--color-accent-bg); }
.btn-ghost { background: none; color: var(--color-text-muted); border-color: var(--color-border); }
.btn-ghost:hover { background: var(--color-surface); color: var(--color-text); }
.btn-danger { background: var(--color-error); color: #fff; }
@media (hover: hover) {
  .btn-danger:hover { background: var(--color-error-bg); color: var(--color-error); }
}

/* Cancel button — no background transition to prevent colour flash on appearance */
#cancel-btn {
  transition: box-shadow var(--transition), transform var(--transition);
}

.btn-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-block-start: var(--space-lg);
}

/* ── Status / errors ── */
.status-bar {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-lg);
  font-size: 0.9rem;
  margin-block-start: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.status-bar.processing {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  position: relative;
  overflow: hidden;
}
.status-bar.processing::after {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: -60%;
  inline-size: 60%;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(74, 158, 255, 0.15) 50%,
    transparent 100%
  );
  animation: status-shimmer 1.4s ease-in-out infinite;
}
@keyframes status-shimmer {
  0%   { inset-inline-start: -60%; }
  100% { inset-inline-start: 110%; }
}
.status-bar.success    { background: var(--color-success-bg); color: var(--color-success); }
.status-bar.error      { background: var(--color-error-bg); color: var(--color-error); }
.status-bar.warning    { background: var(--color-warn-bg); color: var(--color-warn); }

.field-error {
  color: var(--color-error);
  font-size: 0.8rem;
  margin-block-start: var(--space-xs);
}

/* ── Result ── */
.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-block-start: var(--space-md);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  transition: box-shadow 200ms ease;
}
.result-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
}
.result-card.stale { opacity: 0.6; }
.result-card.stale::before {
  content: attr(data-stale-msg);
  display: block;
  background: var(--color-warn-bg);
  color: var(--color-warn);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  font-size: 0.8rem;
  margin-block-end: var(--space-sm);
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-sm);
  margin-block-end: var(--space-md);
}
.stat-item { background: var(--color-bg); border-radius: var(--radius); padding: var(--space-sm); }
.stat-label { font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.stat-value { font-size: 1rem; font-weight: 600; margin-block-start: 2px; }
.stat-value.success   { color: var(--color-success); }
.stat-value.warn      { color: var(--color-warn); }
.stat-value.q-excellent { color: var(--color-success); }
.stat-value.q-good      { color: var(--color-success); }
.stat-value.q-fair      { color: var(--color-warn); }
.stat-value.q-low       { color: var(--color-error); }

/* Reduction stat is the payoff number — visually dominant */
.result-card [data-stat="reduction"] {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--color-success);
}

.quality-tip {
  font-size: 0.8rem;
  margin-block-start: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  display: none;
}
.quality-tip.visible  { display: block; }
.quality-tip.q-fair   { background: var(--color-warn-bg);  color: var(--color-warn); }
.quality-tip.q-low    { background: var(--color-error-bg); color: var(--color-error); }

.preview-toggle {
  display: flex;
  gap: var(--space-sm);
  margin-block-end: var(--space-sm);
}
.preview-toggle button {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: pointer;
  font-size: 0.875rem;
  font-family: inherit;
}
.preview-toggle button.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }

.preview-tabs {
  display: flex;
  gap: var(--space-xs);
  margin-block-end: var(--space-sm);
}
.preview-tab {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  cursor: pointer;
  font-size: 0.875rem;
  font-family: inherit;
  color: var(--color-text-muted);
}
.preview-tab.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.preview-compare-btn {
  display: inline-block;
  margin-block-start: var(--space-xs);
  background: none;
  color: var(--color-accent);
  border: none;
  font-size: 0.8rem;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
  text-decoration: underline;
  user-select: none;
}

.preview-img {
  max-inline-size: 100%;
  max-block-size: 400px;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  display: block;
  background: repeating-conic-gradient(var(--color-border) 0% 25%, var(--color-surface) 0% 50%) 0 0 / 16px 16px;
}

.stat-exact {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  margin-block-start: 1px;
}

/* ── Before/after comparison slider ── */
.compare-slider {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: repeating-conic-gradient(var(--color-border) 0% 25%, var(--color-surface) 0% 50%) 0 0 / 16px 16px;
  cursor: col-resize;
  user-select: none;
  touch-action: none;
  margin-block-end: var(--space-md);
  max-block-size: 420px;
}
.compare-img {
  display: block;
  inline-size: 100%;
  max-block-size: 420px;
  object-fit: contain;
}
.compare-img--original {
  visibility: visible;
}
.compare-overlay {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  inline-size: 50%;
  overflow: hidden;
}
.compare-img--result {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  max-block-size: 420px;
  object-fit: contain;
}
.compare-divider {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 50%;
  inline-size: 2px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.15);
  transform: translateX(-50%);
  pointer-events: none;
}
.compare-handle {
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: 50%;
  transform: translate(-50%, -50%);
  inline-size: 44px;
  block-size: 44px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  pointer-events: none;
}
.compare-label {
  position: absolute;
  inset-block-end: var(--space-sm);
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px var(--space-sm);
  border-radius: var(--radius);
  pointer-events: none;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.compare-label--left  { inset-inline-start: var(--space-sm); }
.compare-label--right { inset-inline-end: var(--space-sm); }

/* ── Resize options collapsible ── */
/* ── Supporting content ── */
.content-section { padding-block: var(--space-xl); border-block-start: 1px solid var(--color-border); }
.content-section h2 { font-size: 1.4rem; font-weight: 700; margin-block-end: var(--space-lg); }
.content-section h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-block-end: var(--space-sm);
  margin-block-start: var(--space-xl);
  padding-inline-start: var(--space-sm);
  border-inline-start: 3px solid var(--color-accent);
}
.content-section p  { color: var(--color-text-muted); margin-block-end: var(--space-sm); }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--space-md);
}
.step-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
}
.step-card::before {
  content: attr(data-step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 26px;
  block-size: 26px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
  margin-block-end: var(--space-sm);
}
.step-card h3 { font-size: 0.95rem; margin-block-start: 0; }
.step-card p  { font-size: 0.875rem; margin-block-end: 0; }

.faq-list { display: flex; flex-direction: column; gap: var(--space-sm); }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), background var(--transition);
  overflow: hidden;
}
.faq-item[open] {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
}
.faq-item summary {
  padding: var(--space-md);
  cursor: pointer;
  font-weight: 500;
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "▾"; flex-shrink: 0; }
.faq-item[open] summary::after { content: "▴"; }
.faq-item p { padding: 0 var(--space-md) var(--space-md); color: var(--color-text-muted); font-size: 0.9rem; }
.faq-cta-link {
  display: inline-block;
  margin: 0 var(--space-md) var(--space-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-accent-bg);
  transition: background var(--transition), color var(--transition);
}
.faq-cta-link:hover {
  background: var(--color-accent);
  color: #fff;
}

.faq-contact-note {
  margin-block-start: var(--space-lg);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}
.faq-contact-link {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}
.faq-contact-link:hover { text-decoration: underline; }

/* ── Batch savings summary ── */
.batch-savings {
  margin-block-start: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
}
.savings-header {
  display: flex;
  align-items: center;
  margin-block-end: var(--space-md);
}
.savings-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}
.savings-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--space-sm);
}
.savings-stat {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: var(--space-sm);
}
.savings-stat--highlight {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success);
}
.savings-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.savings-value {
  font-size: 1rem;
  font-weight: 700;
  margin-block-start: 2px;
  color: var(--color-text);
}
.savings-stat--highlight .savings-value { color: var(--color-success); }
.savings-none {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-block-start: var(--space-sm);
}

/* ── Batch queue ── */
.batch-queue { margin-block-start: var(--space-md); }

.batch-summary {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  display: none;
}

.queue-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.queue-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: var(--space-sm);
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-sm) var(--space-md);
}
.queue-item.qi-processing { border-color: var(--color-accent); background: var(--color-accent-bg); }
.queue-item.qi-done       { border-color: var(--color-success); }
.queue-item.qi-error      { border-color: var(--color-error);   background: var(--color-error-bg); }
.queue-item.qi-cancelled  { opacity: 0.55; }

.qi-thumb {
  inline-size: 48px;
  block-size: 48px;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  flex-shrink: 0;
}

.qi-info { min-inline-size: 0; }
.qi-name {
  font-size: 0.875rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.qi-status {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-block-start: 2px;
}
.qi-processing .qi-status { color: var(--color-accent); }
.qi-done       .qi-status { color: var(--color-success); }
.qi-error      .qi-status { color: var(--color-error);   }

.qi-actions { display: flex; gap: var(--space-xs); align-items: center; flex-shrink: 0; }
.qi-download {
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}
.qi-download:hover { background: var(--color-accent-dark); }
.qi-remove {
  padding: var(--space-xs);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1;
  font-family: inherit;
}
.qi-remove:hover { background: var(--color-error-bg); color: var(--color-error); border-color: var(--color-error); }

.qi-target {
  font-size: 0.8rem;
  font-weight: 500;
  margin-block-start: 2px;
}

.qi-dim-warn {
  font-size: 0.75rem;
  color: var(--color-warn);
  margin-block-start: 2px;
  line-height: 1.4;
}

/* ── Ad placeholders ── */
.ad-slot { display: none; }
.ad-slot.enabled {
  display: block;
  min-block-size: 250px;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  margin-block: var(--space-lg);
  text-align: center;
  padding: var(--space-sm);
  overflow: hidden;
}
@media (min-width: 768px) {
  .ad-slot.enabled {
    min-block-size: 90px;
    margin-block: var(--space-xl);
    padding: var(--space-md);
  }
}

/* ── Footer ── */
.site-footer {
  border-block-start: 1px solid var(--color-border);
  padding-block: var(--space-xl);
  margin-block-start: auto;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  align-items: center;
  justify-content: space-between;
}
.footer-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: nowrap;
  justify-content: flex-end;
  flex: 1;
  min-inline-size: 0;
}
.footer-links a { color: var(--color-text-muted); text-decoration: none; white-space: nowrap; }
.footer-links a:hover { color: var(--color-accent); }
.footer-left { display: flex; flex-direction: column; gap: 0.2rem; flex-shrink: 0; }
.footer-note { font-size: 0.8rem; color: var(--color-text-muted); }

/* ── Static pages ── */
.page-content { padding-block: var(--space-xl); max-inline-size: 700px; }
.page-content h1 { font-size: 1.6rem; margin-block-end: var(--space-lg); }
.page-content h2 { font-size: 1.2rem; font-weight: 700; margin-block-start: var(--space-xl); margin-block-end: var(--space-sm); }
.page-content h3 { font-size: 1rem; font-weight: 600; margin-block-start: var(--space-lg); margin-block-end: var(--space-xs); }
.page-content p  { color: var(--color-text); margin-block-end: var(--space-lg); }
.page-content a  { color: var(--color-accent); }
.page-content ul,
.page-content ol { padding-inline-start: var(--space-lg); margin-block-end: var(--space-lg); color: var(--color-text); }
.page-content li { margin-block-end: var(--space-xs); line-height: 1.6; }
.page-content strong { font-weight: 600; }
.page-content hr { border: none; border-block-start: 1px solid var(--color-border); margin-block: var(--space-xl); }

/* ── Breadcrumb ── */
.page-breadcrumb {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-block-end: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.page-breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
.page-breadcrumb a:hover { color: var(--color-accent); }
.page-breadcrumb span:last-child { color: var(--color-text); font-weight: 500; }
.page-hero {
  background: var(--color-surface);
  border-block-end: 1px solid var(--color-border);
  padding-block: var(--space-lg);
}
.page-hero h1 {
  font-size: clamp(1.4rem, 4vw, 1.8rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.25;
}
.license-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  margin-block-end: var(--space-md);
}
.license-card-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  margin-block-end: var(--space-xs);
}
.license-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-block-end: var(--space-xs);
}
.license-card-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius);
  padding: 2px var(--space-sm);
}
.license-source {
  margin-block-start: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.license-source a { color: var(--color-accent); }
.page-back {
  margin-block-start: var(--space-lg);
  padding-block-start: var(--space-lg);
  border-block-start: 1px solid var(--color-border);
  display: block;
}
.page-cta {
  margin-block-start: var(--space-lg);
  display: block;
}
.page-back-btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff !important;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
}
.page-back-btn:hover { background: var(--color-accent-dark); color: #fff !important; }

/* ── Icon-only button (clipboard copy) ── */
.btn-icon {
  background: var(--color-bg);
  color: var(--color-text-muted);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-sm);
  inline-size: 2.5rem;
  block-size: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition);
}
.btn-icon:hover {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-icon.copied {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success);
}

/* ── PWA install prompt ── */
.pwa-install-bar {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  background: var(--color-accent-bg);
  border-block-end: 1px solid var(--color-border);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.85rem;
  color: var(--color-text);
  flex-wrap: nowrap;
  overflow: hidden;
}
.pwa-install-bar.visible { display: flex; }
.pwa-install-bar p { margin: 0; flex: 1; min-inline-size: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pwa-install-actions { display: flex; gap: var(--space-sm); flex-shrink: 0; }
.pwa-install-btn {
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}
.pwa-install-btn:hover { background: var(--color-accent-dark); }
.pwa-install-dismiss {
  padding: var(--space-xs);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1;
  font-family: inherit;
}
.pwa-install-dismiss:hover { color: var(--color-text); }

/* ── Glossary CTA (home page content section) ── */
.glossary-cta {
  margin-block-start: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent-bg);
  border: 1px solid var(--color-border);
  border-inline-start: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.glossary-cta-text {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0;
}
.glossary-cta-link {
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  white-space: nowrap;
}
.glossary-cta-link:hover { text-decoration: underline; }

/* Inline glossary links inside FAQ answers */
.glossary-inline-link { color: var(--color-accent); }
.faq-item p .glossary-inline-link:hover { text-decoration: underline; }

/* ── Glossary ── */
.glossary-content { padding-block: var(--space-xl); max-inline-size: 700px; }

.glossary-intro {
  font-size: 1rem;
  color: var(--color-text);
  margin-block-end: var(--space-lg);
  line-height: 1.6;
}

.glossary-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs) var(--space-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-block-start: var(--space-xl);
  margin-block-end: var(--space-xl);
}
.glossary-jump-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  flex-shrink: 0;
  inline-size: 100%;
  margin-block-end: var(--space-xs);
}
.glossary-jump a {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  display: inline-flex;
  align-items: center;
  min-block-size: 44px;
}
.glossary-jump a:hover {
  background: var(--color-accent-bg);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Category group headers */
.glossary-group-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  padding-block-end: var(--space-sm);
  margin-block-start: var(--space-xl);
  margin-block-end: var(--space-md);
  border-block-end: 2px solid var(--color-accent);
  display: inline-block;
}
.glossary-group-label:first-child { margin-block-start: 0; }

.glossary-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.glossary-list dd { margin-inline-start: 0; }

.glossary-entry {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  scroll-margin-block-start: 5rem;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.glossary-entry:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.glossary-entry dt {
  margin-block-end: var(--space-md);
  padding-block-end: var(--space-md);
  border-block-end: 1px solid var(--color-border);
}

.glossary-term {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-block-end: var(--space-xs);
}

.glossary-full {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}

.glossary-entry dd p {
  margin-block-end: var(--space-md);
  line-height: 1.7;
  color: var(--color-text);
}

.glossary-use {
  background: var(--color-accent-bg);
  border: 1px solid var(--color-border);
  border-inline-start: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text);
  margin-block-end: 0;
  line-height: 1.6;
}

.glossary-try-link {
  display: inline-block;
  margin-block-start: var(--space-sm);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}
.glossary-try-link:hover { text-decoration: underline; }

@media (max-width: 480px) {
  .glossary-term { font-size: 1.1rem; }
  .glossary-entry { padding: var(--space-md); }
  .queue-item { grid-template-columns: 48px 1fr; grid-template-rows: auto auto; }
  .qi-actions { grid-column: 2; grid-row: 2; padding-block-start: var(--space-xs); }
}

/* ── 404 ── */
.not-found { text-align: center; padding-block: var(--space-xl); }
.not-found h1 { font-size: 4rem; color: var(--color-border); }
.not-found p  { color: var(--color-text-muted); margin-block: var(--space-md); }
.not-found-actions {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
  margin-block-start: var(--space-lg);
}

/* ── noscript ── */
noscript .noscript-msg {
  background: var(--color-warn-bg);
  color: var(--color-warn);
  padding: var(--space-sm) var(--space-md);
  text-align: center;
  font-size: 0.9rem;
}

/* ── Utilities ── */
.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}
.hidden { display: none !important; }
[dir="rtl"] .float-end { float: inline-start; }

/* ── Language switch dialog ── */
.lang-switch-box {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  max-inline-size: 360px;
  inline-size: 100%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.lang-switch-msg {
  margin-block-end: var(--space-md);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text);
}
.lang-switch-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-md);
}
.lang-switch-btn-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.qi-target-met   { color: var(--color-success); }
.qi-target-unmet { color: var(--color-error); }

/* ── Dark mode ── */
/* OS preference applies unless overridden by data-theme attribute */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg:          #0f1623;
    --color-surface:     #1a2436;
    --color-border:      #2c3e58;
    --color-text:        #e8edf4;
    --color-text-muted:  #9aaec8;
    --color-accent:      #6ab4ff;
    --color-accent-dark: #4a9eff;
    --color-accent-bg:   #112236;
    --color-success:     #4ade80;
    --color-success-bg:  #0f2a1a;
    --color-error:       #f87171;
    --color-error-bg:    #2a0f0f;
    --color-warn:        #fbbf24;
    --color-warn-bg:     #2a1f0a;
    --color-focus:       #93c5fd;
  }
  /* Hero gradient override — replaces hardcoded light hex values */
  :root:not([data-theme="light"]) .hero {
    background: linear-gradient(135deg, #111c2e 0%, #0f1623 50%, #131a2a 100%);
  }
  /* btn-primary — dark accent #6ab4ff is too light for white text (2.2:1)
     Switch to dark text for 7.2:1 contrast on the primary action button */
  :root:not([data-theme="light"]) .btn-primary {
    color: #0f1623;
  }
  /* Step pill — same dark-text fix as btn-primary in dark mode */
  :root:not([data-theme="light"]) .step-card::before {
    color: #0f1623;
  }
  /* Result card shadow — higher opacity needed on dark surfaces */
  :root:not([data-theme="light"]) .result-card {
    box-shadow: 0 2px 12px rgba(0,0,0,0.4), 0 1px 3px rgba(0,0,0,0.3);
  }
  :root:not([data-theme="light"]) .result-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.5), 0 2px 6px rgba(0,0,0,0.35);
  }
  /* Tool section — shadow invisible at 4% on dark bg, raise opacity */
  :root:not([data-theme="light"]) .tool-section {
    box-shadow: 0 4px 24px rgba(0,0,0,0.25), 0 1px 4px rgba(0,0,0,0.2);
  }
}
/* Manual dark override — wins regardless of OS setting */
:root[data-theme="dark"] {
  --color-bg:          #0f1623;
  --color-surface:     #1a2436;
  --color-border:      #2c3e58;
  --color-text:        #e8edf4;
  --color-text-muted:  #9aaec8;
  --color-accent:      #6ab4ff;
  --color-accent-dark: #4a9eff;
  --color-accent-bg:   #112236;
  --color-success:     #4ade80;
  --color-success-bg:  #0f2a1a;
  --color-error:       #f87171;
  --color-error-bg:    #2a0f0f;
  --color-warn:        #fbbf24;
  --color-warn-bg:     #2a1f0a;
  --color-focus:       #93c5fd;
}
/* Manual dark hero override */
:root[data-theme="dark"] .hero {
  background: linear-gradient(135deg, #111c2e 0%, #0f1623 50%, #131a2a 100%);
}
/* Manual dark btn-primary — same fix as OS dark path */
:root[data-theme="dark"] .btn-primary {
  color: #0f1623;
}
/* Step pill dark override */
:root[data-theme="dark"] .step-card::before {
  color: #0f1623;
}
/* Manual dark result card shadow override */
:root[data-theme="dark"] .result-card {
  box-shadow: 0 2px 12px rgba(0,0,0,0.4), 0 1px 3px rgba(0,0,0,0.3);
}
:root[data-theme="dark"] .result-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.5), 0 2px 6px rgba(0,0,0,0.35);
}
/* Tool section — shadow invisible at 4% on dark bg, raise opacity */
:root[data-theme="dark"] .tool-section {
  box-shadow: 0 4px 24px rgba(0,0,0,0.25), 0 1px 4px rgba(0,0,0,0.2);
}

/* ── Theme toggle button ── */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xs) var(--space-sm);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface); }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0ms !important; }
  html { scroll-behavior: auto; }
  .btn-primary:hover, .btn-primary:active { transform: none; }
}

/* ── Mobile ── */
@media (max-width: 640px) {
  .site-nav{display:none;}
  /* Result stats — 2 columns on mobile */
  .result-stats { grid-template-columns: 1fr 1fr; }

  /* Reduction stat — full width hero row on mobile */
  .result-stats .stat-item:has([data-stat="reduction"]) {
    grid-column: 1 / -1;
  }
  .result-card [data-stat="reduction"] { font-size: 1.6rem; }

  /* Target met — long string, reduce font size */
  .result-card [data-stat="target-met"] { font-size: 0.85rem; }
}

@media (max-width: 480px) {
  .site-nav{display:none;}
  .site-header .container { gap: var(--space-sm); }
  .preset-grid { grid-template-columns: repeat(3, 1fr); }
  .result-stats { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .btn-row { flex-direction: column; }
  .btn-row .btn { inline-size: 100%; }
  /* Copy icon button must stay square — never stretch full width */
  .btn-row .btn-icon { inline-size: 2.5rem; align-self: flex-start; }
  /* Result card btn-row — keep as row so Download/Share/Reset stay side by side */
  .result-card .btn-row { flex-direction: row; flex-wrap: wrap; }
  .result-card .btn-row .btn { inline-size: auto; flex: 1; min-inline-size: 0; }

  /* Footer — compact single column */
  .site-footer .container {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  .footer-links {
    flex-wrap: nowrap;
    font-size: 0.7rem;
  }
  .footer-link--secondary { display: none; }

  /* Format row — constrain so cards don't stretch too wide */
  .format-row { gap: var(--space-xs); }

  /* Batch queue — thumbnail hidden, actions inline right of filename */
  .queue-item {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    align-items: start;
  }
  .qi-thumb { display: none; }
  .qi-info  { grid-column: 1; grid-row: 1 / 3; min-inline-size: 0; }
  .qi-actions {
    grid-column: 2;
    grid-row: 1;
    padding-block-start: 0;
    align-self: start;
  }
  .qi-download { font-size: 0.75rem; padding: var(--space-xs) var(--space-sm); white-space: nowrap; }
  .qi-remove { padding: var(--space-xs); }
  .qi-status { white-space: normal; line-height: 1.4; font-size: 0.75rem; }
  .qi-target { font-size: 0.75rem; }

  /* Compare slider — cap height so download button stays visible */
  .compare-slider { max-block-size: 300px; }

  /* Settings card — reduce padding so tool controls have more usable width */
  .settings-card { padding: var(--space-md); }

  /* Drop zone — reduce padding on mobile */
  .drop-zone { padding: var(--space-lg) var(--space-md); }

  /* Page content — reduce top/bottom padding on mobile */
  .page-content { padding-block: var(--space-lg); }

  /* Content section h3 — reduce top margin on mobile */
  .content-section h3 { margin-block-start: var(--space-lg); }

  /* Glossary jump pills */
  .glossary-jump a { min-block-size: 36px; font-size: 0.75rem; }
  .glossary-jump { margin-block-start: var(--space-lg); margin-block-end: var(--space-lg); }

}

/* ── Mid-range: tablets and large phones in landscape (481px–640px) ── */
@media (min-width: 481px) and (max-width: 640px) {
  /* Preset grid: 4 columns instead of 7 — prevents very narrow buttons */
  .preset-grid { grid-template-columns: repeat(4, 1fr); }

  /* Steps grid: 2 columns — more readable than 4 at this width */
  .steps-grid { grid-template-columns: repeat(2, 1fr); }

  /* Format row: constrain so cards don’t stretch too wide */
  .format-row { gap: var(--space-xs); }

  /* Glossary jump nav: tighter gap to fit more pills per row */
  .glossary-jump { gap: var(--space-xs); }
}