:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --text-muted: #64748b;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --success: #16a34a;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;
  --success-text: #065f46;
  --danger: #dc2626;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;
  --warning-text: #78350f;
  --shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, .12);
  --radius: 14px;
}

[data-theme="dark"] {
  --bg: #0b0f19;
  --bg-soft: #141a28;
  --border: #263048;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --primary-soft: #1e1b4b;
  --success: #34d399;
  --success-bg: #052e26;
  --success-border: #065f46;
  --success-text: #6ee7b7;
  --warning-bg: #2a1f05;
  --warning-border: #78350f;
  --warning-text: #fcd34d;
  --shadow-md: 0 4px 16px rgba(0, 0, 0, .4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }
html, body { overflow-x: clip; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background .25s, color .25s;
}

.hidden { display: none !important; }
button, input, select { font: inherit; color: inherit; }
img { max-width: 100%; display: block; }

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 40%, transparent);
  outline-offset: 2px;
}

/* ============ HEADER ============ */
.site-header {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  padding-top: max(14px, env(safe-area-inset-top));
  padding-left: max(20px, env(safe-area-inset-left));
  padding-right: max(20px, env(safe-area-inset-right));
  transition: background .25s, border-color .25s;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
  margin-right: auto;
  user-select: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity .15s;
}
.brand:hover { opacity: .85; }
.brand svg { color: var(--primary); flex-shrink: 0; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid transparent;
  background: none;
  border-radius: 10px;
  cursor: pointer;
  color: var(--text);
  transition: background .15s;
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--primary-soft); }

[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }

.nav-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: max(16px, env(safe-area-inset-left));
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  padding: 8px;
  min-width: 220px;
  display: none;
  z-index: 70;
  animation: navDrop .18s ease;
}
@keyframes navDrop {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.nav-menu.open { display: block; }
.nav-menu a {
  display: block;
  padding: 11px 14px;
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
}
.nav-menu a:hover { background: var(--primary-soft); color: var(--primary); }

@media (max-width: 480px) {
  .nav-menu {
    left: max(12px, env(safe-area-inset-left));
    right: max(12px, env(safe-area-inset-right));
    min-width: 0;
  }
}

/* ============ HERO ============ */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 16px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.15;
  margin: 0 0 8px;
}

.subhead {
  font-size: clamp(.9rem, 1.8vw, 1rem);
  color: var(--text-muted);
  margin: 0 0 12px;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
  margin: 0 0 16px;
}
.privacy-badge svg { flex-shrink: 0; }

.drop-zone {
  background: var(--bg-soft);
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 22px 16px;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .15s;
  text-align: center;
  max-width: 460px;
  margin: 0 auto;
}
.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.drop-zone.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: scale(1.01);
}
.drop-icon { color: var(--primary); margin: 0 auto 6px; }
.drop-title { font-size: .95rem; font-weight: 600; margin: 0 0 4px; }
.browse { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.formats {
  font-size: .72rem;
  color: var(--text-muted);
  margin: 0;
  letter-spacing: .02em;
  line-height: 1.6;
}
.formats-meta {
  display: inline-block;
  margin-top: 4px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============ EDITOR ============ */
.editor { max-width: 720px; margin: 0 auto; padding: 16px 20px 40px; }

.file-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: 12px;
  scrollbar-width: thin;
}
.file-strip:empty { display: none; }

.file-thumb {
  position: relative;
  width: 60px; height: 60px;
  flex-shrink: 0;
  border-radius: 10px;
  overflow: hidden;
  border: 2px solid var(--border);
  background: var(--bg-soft);
  cursor: pointer;
  transition: border-color .15s;
}
.file-thumb.active { border-color: var(--primary); }
.file-thumb img { width: 100%; height: 100%; object-fit: cover; }

.file-thumb .remove {
  position: absolute;
  top: 1px; right: 1px;
  width: 18px; height: 18px;
  border: none;
  background: rgba(0,0,0,.7);
  color: #fff;
  border-radius: 50%;
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.file-thumb .remove:hover { background: var(--danger); }

/* ============ PREVIEW + CROP CARDS ============ */
.preview-card,
.crop-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  margin-bottom: 12px;
  position: relative;
  box-shadow: 0 2px 8px rgba(15, 23, 42, .04);
  transition: box-shadow .2s;
}
[data-theme="dark"] .preview-card,
[data-theme="dark"] .crop-card {
  box-shadow: 0 2px 8px rgba(0, 0, 0, .3);
}
.preview-card.stuck,
.crop-card.stuck {
  box-shadow: 0 4px 16px rgba(15, 23, 42, .1);
}

.preview-header {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 6px;
}

.view-toggle {
  background: none;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 8px;
  font-size: .75rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-muted);
  transition: all .15s;
}
.view-toggle:hover { border-color: var(--primary); color: var(--primary); }

.preview-img {
  max-height: 260px;
  max-width: 100%;
  margin: 0 auto 8px;
  border-radius: 8px;
  object-fit: contain;
  background: var(--bg);
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 10px;
}
.compare-grid figure { margin: 0; text-align: center; min-width: 0; }
.compare-grid img {
  width: 100%;
  height: 180px;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-soft) 100%, transparent);
}
.compare-grid figcaption {
  font-size: .72rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 600;
}
@media (max-width: 480px) {
  .compare-grid img { height: 140px; }
}

.preview-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: .78rem;
  font-weight: 600;
  padding: 2px 0;
}
.meta-original { color: var(--text-muted); }
.meta-output { color: var(--success); }
.meta-arrow { color: var(--text-muted); font-weight: 400; }

.scale-info {
  text-align: center;
  font-size: .72rem;
  color: var(--text-muted);
  margin: 2px 0 0;
}

/* ============ CROP ============ */
.crop-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.crop-label {
  font-size: .78rem;
  color: var(--text-muted);
  font-weight: 500;
}

.crop-actions { display: flex; gap: 6px; }

.crop-wrap {
  position: relative;
  display: block;
  margin: 0 auto;
  max-width: 100%;
  width: fit-content;
  user-select: none;
  touch-action: none;
  overflow: hidden;
  border-radius: 8px;
  background: var(--bg);
}

.crop-wrap img {
  display: block;
  max-width: 100%;
  max-height: 280px;
  width: auto;
  height: auto;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.crop-shade {
  position: absolute;
  background: rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

.crop-rect {
  position: absolute;
  border: 2px solid var(--primary);
  box-sizing: border-box;
  cursor: move;
  background: transparent;
  touch-action: none;
}

.crop-handle {
  position: absolute;
  width: 14px; height: 14px;
  background: var(--primary);
  border: 2px solid #fff;
  border-radius: 3px;
  box-sizing: border-box;
  touch-action: none;
}
.crop-handle.nw { top: -8px; left: -8px; cursor: nwse-resize; }
.crop-handle.n  { top: -8px; left: 50%; margin-left: -7px; cursor: ns-resize; }
.crop-handle.ne { top: -8px; right: -8px; cursor: nesw-resize; }
.crop-handle.e  { top: 50%; right: -8px; margin-top: -7px; cursor: ew-resize; }
.crop-handle.se { bottom: -8px; right: -8px; cursor: nwse-resize; }
.crop-handle.s  { bottom: -8px; left: 50%; margin-left: -7px; cursor: ns-resize; }
.crop-handle.sw { bottom: -8px; left: -8px; cursor: nesw-resize; }
.crop-handle.w  { top: 50%; left: -8px; margin-top: -7px; cursor: ew-resize; }

.crop-info {
  text-align: center;
  font-size: .78rem;
  color: var(--text-muted);
  margin: 6px 0 0;
  font-weight: 600;
}

/* ============ CONTROLS ============ */
.controls { display: flex; flex-direction: column; gap: 12px; }

.control-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.dims-row {
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
}
.dims-control { min-width: 0; }
.unit-control { min-width: 72px; }

.pair-row {
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.control { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.control label {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
}

input[type="number"],
select {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  font-size: .92rem;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  outline: none;
  min-width: 0;
}
select:focus,
input[type="number"]:focus { border-color: var(--primary); }

input[type="number"]:disabled,
select:disabled {
  background: var(--bg-soft);
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: .7;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-weight: 500;
  font-size: .88rem;
  padding: 2px 0;
}
.check-row input {
  width: 16px; height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.mode-btn {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 9px 11px;
  border: 2px solid var(--border);
  background: var(--bg);
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  transition: border-color .15s, background .15s;
}
.mode-btn:hover { border-color: color-mix(in srgb, var(--text-muted) 50%, var(--border)); }
.mode-btn.active {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.mode-btn strong { font-size: .82rem; font-weight: 700; color: var(--text); }
.mode-btn span { font-size: .7rem; color: var(--text-muted); }

/* ============ PALETTE ============ */
.palette {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
  margin-top: 2px;
}

.swatch {
  width: 100%;
  aspect-ratio: 1;
  min-width: 24px;
  min-height: 24px;
  max-width: 32px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--swatch);
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, border-color .15s;
  padding: 0;
}
.swatch:hover {
  transform: scale(1.1);
  border-color: var(--text-muted);
}
.swatch.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary) 40%, transparent);
  transform: scale(1.1);
}
.swatch[data-color="#ffffff"] { border-color: #cbd5e1; }
.swatch[data-color="#ffffff"].selected { border-color: var(--primary); }

.swatch-transparent {
  background:
    linear-gradient(45deg, #cbd5e1 25%, transparent 25%),
    linear-gradient(-45deg, #cbd5e1 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #cbd5e1 75%),
    linear-gradient(-45deg, transparent 75%, #cbd5e1 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
  background-color: #fff;
}

.bg-format-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: .75rem;
  line-height: 1.35;
  color: var(--text-muted);
  background: color-mix(in srgb, var(--primary) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 20%, transparent);
  border-radius: 8px;
  padding: 6px 8px;
  margin: 6px 0 0;
  transition: background .2s, border-color .2s, color .2s;
}
.bg-format-note svg {
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--primary);
  transition: color .2s;
  width: 12px;
  height: 12px;
}
.bg-format-note.warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--warning-text);
}
.bg-format-note.warning svg { color: var(--warning-text); }

.note-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.note-text { display: block; }

.switch-link {
  align-self: flex-start;
  background: none;
  border: none;
  padding: 0;
  color: var(--primary);
  font-weight: 500;
  cursor: pointer;
  font-size: .74rem;
  text-decoration: underline;
  text-underline-offset: 2px;
  opacity: .85;
}
.switch-link:hover { opacity: 1; font-weight: 600; }

.preset-hint {
  font-size: .74rem;
  color: var(--text-muted);
  margin: 4px 0 0;
  padding: 5px 8px;
  background: var(--primary-soft);
  border-radius: 8px;
  line-height: 1.35;
}
.preset-hint strong { color: var(--primary); }

#qualitySlider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  outline: none;
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary) 92%, var(--border) 92%, var(--border) 100%);
  cursor: pointer;
}
#qualitySlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  background: var(--bg);
  border: 3px solid var(--primary);
  border-radius: 50%;
  cursor: pointer;
  margin-top: -1px;
}
#qualitySlider::-moz-range-thumb {
  width: 18px; height: 18px;
  background: var(--bg);
  border: 3px solid var(--primary);
  border-radius: 50%;
  cursor: pointer;
}

.format-note {
  font-size: .72rem;
  color: var(--text-muted);
  margin: -4px 0 0;
  line-height: 1.35;
}

/* ============ SUMMARY + DOWNLOAD ============ */
.sticky-download {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.summary-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.summary-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.summary-dot.dot-transparent {
  background:
    linear-gradient(45deg, #cbd5e1 25%, transparent 25%),
    linear-gradient(-45deg, #cbd5e1 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #cbd5e1 75%),
    linear-gradient(-45deg, transparent 75%, #cbd5e1 75%);
  background-size: 6px 6px;
  background-position: 0 0, 0 3px, 3px -3px, -3px 0px;
  background-color: #fff;
}

.summary-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============ BUTTONS ============ */
.button-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  align-items: stretch;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 10px;
  padding: 11px 18px;
  font-size: .92rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s, transform .1s, box-shadow .15s;
  letter-spacing: -.01em;
}
.btn:active { transform: scale(.985); }

.btn.primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--primary) 30%, transparent);
}
.btn.primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--primary) 40%, transparent);
}

.btn.secondary {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 11px 14px;
  font-size: .82rem;
}
.btn.secondary:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

.btn.tiny {
  padding: 5px 10px;
  font-size: .74rem;
  border-radius: 7px;
}

/* ============ CONTENT ============ */
.how-it-works,
.features,
.faq {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px;
  border-top: 1px solid var(--border);
}

.how-it-works h2,
.features h2,
.faq h2 {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0 0 16px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; } }

.step {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: .82rem;
  margin-bottom: 8px;
}
.step h3 { font-size: .92rem; font-weight: 700; margin: 0 0 4px; }
.step p { font-size: .82rem; color: var(--text-muted); margin: 0; line-height: 1.45; }

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 20px;
}
@media (max-width: 640px) { .feature-list { grid-template-columns: 1fr; } }
.feature-list li {
  position: relative;
  padding-left: 24px;
  font-size: .88rem;
  line-height: 1.45;
}
.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0; top: 0;
  width: 16px; height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--success);
  color: #fff;
  border-radius: 50%;
  font-size: .65rem;
  font-weight: 800;
}

.faq details {
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.faq details:first-of-type { border-top: 1px solid var(--border); }

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .92rem;
  padding: 2px 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+';
  font-size: 1.1rem;
  color: var(--primary);
  font-weight: 400;
}
.faq details[open] summary::after { content: '−'; }
.faq details p {
  margin: 6px 0 0;
  color: var(--text-muted);
  font-size: .88rem;
  line-height: 1.5;
}

.site-footer {
  text-align: center;
  padding: 24px 20px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: .8rem;
}
.site-footer nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--primary); text-decoration: underline; }
.site-footer p { margin: 0; }

/* ============ OVERLAYS ============ */
#loading {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #fff;
  font-weight: 600;
  z-index: 100;
}
.spinner {
  width: 44px; height: 44px;
  border: 4px solid rgba(255,255,255,.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#toast {
  position: fixed;
  bottom: max(100px, calc(env(safe-area-inset-bottom) + 100px));
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background: var(--success);
  color: #fff;
  padding: 11px 18px;
  border-radius: 10px;
  font-weight: 600;
  font-size: .85rem;
  opacity: 0;
  pointer-events: none;
  transition: all .3s cubic-bezier(.34,1.4,.64,1);
  z-index: 110;
  max-width: 90vw;
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
  text-align: center;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============ MOBILE ============ */
@media (max-width: 640px) {
  .site-header {
    padding-top: max(10px, env(safe-area-inset-top));
    padding-bottom: 10px;
  }

  .preview-card,
  .crop-card {
    position: sticky;
    top: calc(env(safe-area-inset-top) + 48px);
    z-index: 20;
  }

  .sticky-download {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-top: 1px solid var(--border);
    box-shadow: 0 -6px 20px rgba(0, 0, 0, .08);
    z-index: 50;
    margin: 0;
    gap: 6px;
  }
  [data-theme="dark"] .sticky-download {
    box-shadow: 0 -6px 20px rgba(0, 0, 0, .4);
  }
  .summary-bar { padding: 6px 10px; font-size: .72rem; }
  .summary-dot { width: 10px; height: 10px; }
  .button-row {
    grid-template-columns: auto 1fr;
    gap: 8px;
  }
  .btn { padding: 11px 16px; font-size: .88rem; }
  .btn.secondary { padding: 11px 12px; }

  .editor {
    padding-bottom: 140px;
  }
}

@media (max-width: 480px) {
  .hero { padding: 20px 14px 12px; }
  .editor { padding: 12px 14px 140px; }
  .how-it-works, .features, .faq { padding: 28px 14px; }
  .drop-zone { padding: 18px 14px; }
  .preview-img { max-height: 200px; }
  .crop-wrap img { max-height: 220px; }
  .dims-row { grid-template-columns: 1fr 1fr auto; }
  .pair-row { grid-template-columns: 1fr 1fr; }
  .mode-btn strong { font-size: .78rem; }
  .mode-btn span { font-size: .66rem; }
  .palette { gap: 5px; }
  .swatch { min-width: 22px; min-height: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}

/* ============================================================
   DOWNLOAD CHOICE MODAL (Pro users)
   ============================================================ */
.download-choice-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 120;
  animation: choiceFadeIn .18s ease;
}
.download-choice-overlay.closing {
  animation: choiceFadeOut .18s ease forwards;
}
@keyframes choiceFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes choiceFadeOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}

.download-choice-modal {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px 22px;
  max-width: 400px;
  width: 100%;
  box-shadow: 0 24px 60px rgba(15, 23, 42, .3);
  animation: choiceScaleIn .22s cubic-bezier(.34,1.4,.64,1);
}
@keyframes choiceScaleIn {
  from { opacity: 0; transform: scale(.94); }
  to   { opacity: 1; transform: scale(1); }
}

.download-choice-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0 0 6px;
  color: var(--text);
}
.download-choice-sub {
  font-size: .85rem;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.download-choice-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  margin-bottom: 10px;
  transition: border-color .15s, background .15s, transform .1s;
}
.download-choice-btn:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
}
.download-choice-btn:active {
  transform: scale(.985);
}
.download-choice-btn svg {
  flex-shrink: 0;
  color: var(--primary);
}

.download-choice-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.download-choice-label strong {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
}
.download-choice-label span {
  font-size: .78rem;
  color: var(--text-muted);
}

.download-choice-zip {
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  background: color-mix(in srgb, var(--primary) 6%, var(--bg));
}
.download-choice-zip:hover {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, var(--bg));
}

.download-choice-cancel {
  width: 100%;
  padding: 10px;
  border: none;
  background: none;
  color: var(--text-muted);
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 8px;
  margin-top: 4px;
}
.download-choice-cancel:hover {
  background: var(--bg-soft);
  color: var(--text);
}

/* ============================================================
   ADJUSTMENTS (Pro feature — brightness/contrast/saturation)
   ============================================================ */
.adjustments-block {
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  transition: background .2s, border-color .2s;
}

.adjustments-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.adjustments-header > label {
  font-size: .85rem;
  font-weight: 700;
  color: var(--text);
}

.pro-badge-small {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, #f59e0b 0%, #ec4899 100%);
  color: #fff;
  font-size: .62rem;
  font-weight: 800;
  letter-spacing: .04em;
  flex-shrink: 0;
}
.pro-badge-small.hidden { display: none !important; }

.adjustments-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
}
@media (max-width: 560px) {
  .adjustments-grid { grid-template-columns: 1fr; gap: 10px; }
}

.adjustment-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.adjustment-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 6px;
}
.adjustment-label-row label {
  font-size: .74rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.adjustment-label-row span {
  font-size: .72rem;
  font-weight: 700;
  color: var(--text);
  flex-shrink: 0;
}

/* Sliders */
#brightnessSlider,
#contrastSlider,
#saturationSlider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  outline: none;
  background: var(--border);
  cursor: pointer;
  transition: opacity .15s;
}

#brightnessSlider::-webkit-slider-thumb,
#contrastSlider::-webkit-slider-thumb,
#saturationSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px; height: 16px;
  background: var(--primary);
  border: 2px solid #fff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
}
#brightnessSlider::-moz-range-thumb,
#contrastSlider::-moz-range-thumb,
#saturationSlider::-moz-range-thumb {
  width: 16px; height: 16px;
  background: var(--primary);
  border: 2px solid #fff;
  border-radius: 50%;
  cursor: pointer;
}

/* Reset button */
.adjustments-reset-btn {
  margin-top: 10px;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: .74rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.adjustments-reset-btn:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}

/* Lock overlay — shown to free users */
.adjustments-lock-overlay {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px;
  text-align: center;
  z-index: 2;
}

.adjustments-lock-text {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-muted);
  line-height: 1.35;
  max-width: 90%;
}
.adjustments-lock-text svg {
  flex-shrink: 0;
  color: var(--primary);
}

.adjustments-upgrade-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent, #ec4899) 100%);
  color: #fff;
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--primary) 30%, transparent);
  transition: transform .1s, box-shadow .15s, filter .15s;
}
.adjustments-upgrade-btn:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--primary) 40%, transparent);
}
.adjustments-upgrade-btn:active {
  transform: scale(.97);
}

/* When user is free, sliders look disabled */
[data-tier="free"] .adjustment-row input[type="range"] {
  opacity: .4;
  pointer-events: none;
}

/* ============================================================
   ADJUSTMENTS ACTIONS (Auto-enhance + Reset)
   ============================================================ */
.adjustments-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.adjustments-auto-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--primary) 40%, var(--border));
  background: color-mix(in srgb, var(--primary) 8%, var(--bg));
  color: var(--primary);
  font-size: .74rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
}
.adjustments-auto-btn:hover {
  background: color-mix(in srgb, var(--primary) 15%, var(--bg));
  border-color: var(--primary);
}
.adjustments-auto-btn:active {
  transform: scale(.97);
}
.adjustments-auto-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}
.adjustments-auto-btn svg {
  flex-shrink: 0;
}

.adjustments-reset-btn {
  margin-top: 0;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: .74rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.adjustments-reset-btn:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
}
.adjustments-reset-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}


/* ============================================================
   TARGET FILE SIZE
   ============================================================ */
.target-size-block {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.target-size-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}
.target-size-header > label {
  font-size: .85rem;
  font-weight: 700;
  color: var(--text);
}

.target-size-input-wrap {
  display: flex;
  gap: 0;
}

.target-size-input-wrap input[type="number"] {
  flex: 1 1 auto;
  width: auto;
  min-width: 0;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 10px 0 0 10px;
  border-right: none;
  font-size: .92rem;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color .15s;
  display: block;
  visibility: visible;
  opacity: 1;
}
.target-size-input-wrap input[type="number"]:focus {
  border-color: var(--primary);
}
.target-size-input-wrap input[type="number"]::placeholder {
  color: var(--text-muted);
  font-size: .85rem;
}

.target-size-input-wrap select {
  border: 1px solid var(--border);
  border-radius: 0 10px 10px 0;
  background: var(--bg-soft);
  padding: 0 10px;
  font-size: .85rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  outline: none;
}

.target-size-hint {
  font-size: .72rem;
  color: var(--text-muted);
  margin: 6px 0 0;
  line-height: 1.35;
}

.target-size-hint.warning {
  color: var(--warning-text);
  font-weight: 600;
}

.target-size-hint.success {
  color: var(--success);
  font-weight: 600;
}

/* When target is active, quality slider is visually de-emphasized */
.target-size-block.active ~ #qualityControl {
  opacity: .5;
}