/* Your Mark — Apple-inspired adaptive workstation layer */
:root {
  color-scheme: dark;
  --space-1: .5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --ui-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
  --canvas: #090b10;
  --canvas-elevated: #101319;
  --surface: rgba(29, 32, 40, .78);
  --surface-solid: #1b1e25;
  --surface-raised: rgba(41, 45, 55, .88);
  --surface-control: rgba(255, 255, 255, .075);
  --surface-control-hover: rgba(255, 255, 255, .12);
  --ink: rgba(255, 255, 255, .94);
  --ink-soft: rgba(255, 255, 255, .64);
  --ink-muted: rgba(255, 255, 255, .42);
  --line: rgba(255, 255, 255, .11);
  --line-strong: rgba(255, 255, 255, .18);
  --accent: #0a84ff;
  --accent-hover: #3098ff;
  --accent-soft: rgba(10, 132, 255, .16);
  --success: #30d158;
  --warning: #ffd60a;
  --danger: #ff453a;
  --shadow-1: 0 1px 2px rgba(0, 0, 0, .22), 0 8px 24px rgba(0, 0, 0, .18);
  --shadow-2: 0 24px 70px rgba(0, 0, 0, .34), 0 1px 0 rgba(255, 255, 255, .06) inset;
  --material-blur: blur(24px) saturate(150%);
  --r-lg: 22px;
  --r-md: 16px;
  --r-sm: 12px;
  --motion-out: cubic-bezier(.16, 1, .3, 1);
  --motion-system: cubic-bezier(.22, 1, .36, 1);
  --glass-line: var(--line);
  --text-primary: var(--ink);
  --text-secondary: var(--ink-soft);
  --text-tertiary: var(--ink-muted);
  --font-primary: var(--ui-font);
  --font-secondary: var(--ui-font);
  --font: var(--ui-font);
}

html[data-theme="light"] {
  color-scheme: light;
  --canvas: #f2f2f7;
  --canvas-elevated: #ffffff;
  --surface: rgba(255, 255, 255, .76);
  --surface-solid: #ffffff;
  --surface-raised: rgba(255, 255, 255, .92);
  --surface-control: rgba(18, 22, 31, .055);
  --surface-control-hover: rgba(18, 22, 31, .09);
  --ink: rgba(10, 12, 18, .94);
  --ink-soft: rgba(28, 32, 42, .66);
  --ink-muted: rgba(28, 32, 42, .45);
  --line: rgba(20, 24, 32, .10);
  --line-strong: rgba(20, 24, 32, .17);
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-soft: rgba(0, 113, 227, .11);
  --success: #248a3d;
  --warning: #a05a00;
  --danger: #d70015;
  --shadow-1: 0 1px 2px rgba(19, 24, 35, .07), 0 10px 30px rgba(19, 24, 35, .08);
  --shadow-2: 0 28px 70px rgba(35, 42, 55, .16), 0 1px 0 rgba(255, 255, 255, .85) inset;
}

@media (prefers-color-scheme: light) {
  html[data-theme="auto"] {
    color-scheme: light;
    --canvas: #f2f2f7;
    --canvas-elevated: #ffffff;
    --surface: rgba(255, 255, 255, .76);
    --surface-solid: #ffffff;
    --surface-raised: rgba(255, 255, 255, .92);
    --surface-control: rgba(18, 22, 31, .055);
    --surface-control-hover: rgba(18, 22, 31, .09);
    --ink: rgba(10, 12, 18, .94);
    --ink-soft: rgba(28, 32, 42, .66);
    --ink-muted: rgba(28, 32, 42, .45);
    --line: rgba(20, 24, 32, .10);
    --line-strong: rgba(20, 24, 32, .17);
    --accent: #0071e3;
    --accent-hover: #0077ed;
    --accent-soft: rgba(0, 113, 227, .11);
    --success: #248a3d;
    --warning: #a05a00;
    --danger: #d70015;
    --shadow-1: 0 1px 2px rgba(19, 24, 35, .07), 0 10px 30px rgba(19, 24, 35, .08);
    --shadow-2: 0 28px 70px rgba(35, 42, 55, .16), 0 1px 0 rgba(255, 255, 255, .85) inset;
  }
}

html { background: var(--canvas); font-size: 100%; }
body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--ui-font);
  font-optical-sizing: auto;
  letter-spacing: 0;
  transition: background-color 260ms var(--motion-system), color 200ms ease;
}
body::before {
  background:
    radial-gradient(80% 58% at 50% -16%, color-mix(in srgb, var(--accent) 15%, transparent), transparent 70%),
    linear-gradient(180deg, color-mix(in srgb, var(--canvas-elevated) 55%, transparent), transparent 38%);
  filter: none;
}
.ambient-bg .orb { animation: none !important; opacity: .08; filter: blur(120px); }
.ambient-grain { opacity: .012; mix-blend-mode: soft-light; }

button, input, select, textarea { font-family: inherit; }
button { touch-action: manipulation; }
button.is-pressed, .btn.is-pressed, [role="button"].is-pressed { transform: scale(.97) !important; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 54%, transparent); outline-offset: 2px; }

.app { max-width: 1440px; padding: 24px 24px 48px; }
body:not(.has-file) .app { min-height: 100dvh; display: flex; flex-direction: column; justify-content: center; padding-block: 28px 72px; }

/* Floating toolbar */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin: 0 0 24px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-1);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
  animation: none !important;
  overflow: visible;
  transform: none !important;
}
.hero::after, .hero > .hero-edge-glow { display: none; }
.hero-copy { display: flex; align-items: center; min-width: 0; gap: 16px; text-align: left; }
.brand-lockup { display: flex; align-items: center; gap: 11px; min-width: 0; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 11px;
  background: linear-gradient(145deg, #2b9cff, #0064d8);
  color: white;
  font-size: 20px;
  font-weight: 720;
  letter-spacing: -.04em;
  box-shadow: 0 8px 22px rgba(0, 113, 227, .24), inset 0 1px rgba(255, 255, 255, .35);
}
.brand-words { min-width: 0; }
.hero .brand-logo, body.has-file .hero .brand-logo {
  margin: 0 0 1px;
  padding: 0;
  border: 0;
  background: none;
  box-shadow: none;
  color: var(--ink-muted);
  font-size: 9px;
  font-weight: 650;
  letter-spacing: .12em;
  line-height: 1.1;
}
.hero .main-title, body.has-file .hero .main-title {
  margin: 0;
  color: var(--ink);
  -webkit-text-fill-color: currentColor;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.025em;
  filter: none;
  text-shadow: none;
}
.hero .tagline, body.has-file .hero .tagline {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 0;
  white-space: nowrap;
}
body.has-file .hero { padding: 10px 12px; margin-bottom: 16px; border-radius: 16px; }
body.has-file .brand-mark { width: 34px; height: 34px; border-radius: 10px; font-size: 17px; }

.theme-control { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.theme-control-label { color: var(--ink-muted); font-size: 11px; font-weight: 600; }
.theme-segment {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-control);
}
.theme-option {
  min-width: 48px;
  min-height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  transition: color 160ms ease, background 220ms var(--motion-system), box-shadow 220ms var(--motion-system), transform 100ms ease-out;
}
.theme-option:hover { color: var(--ink); background: var(--surface-control-hover); }
.theme-option.active { color: var(--ink); background: var(--surface-raised); box-shadow: var(--shadow-1); }

/* Import stage */
.entry-grid { width: 100%; }
.upload-zone {
  min-height: 450px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 52px 32px 30px;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: var(--shadow-2);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
  transform: none;
  transition: border-color 180ms ease, background 180ms ease, box-shadow 220ms ease;
}
.upload-zone::before { border-color: transparent; background: none; opacity: 0; }
.upload-zone::after { display: none; animation: none; }
.upload-zone:hover, .upload-zone.drag-over {
  transform: none;
  border-color: color-mix(in srgb, var(--accent) 48%, var(--line));
  background: color-mix(in srgb, var(--surface-raised) 90%, transparent);
  box-shadow: var(--shadow-2), 0 0 0 5px var(--accent-soft);
}
.upload-zone .upload-content { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; }
.upload-zone .icon {
  width: 72px;
  height: 72px;
  margin-bottom: 22px;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: none;
  animation: none !important;
  transition: transform 180ms var(--motion-system), background 180ms ease;
}
.upload-zone:hover .icon { transform: scale(1.035); box-shadow: none; background: color-mix(in srgb, var(--accent) 20%, transparent); }
.upload-zone .title { color: var(--ink); font-size: clamp(24px, 3vw, 34px); font-weight: 700; letter-spacing: -.025em; line-height: 1.14; text-shadow: none; }
.upload-zone .hint { margin-top: 10px; color: var(--ink-soft); font-size: 14px; }
.local-privacy { position: relative; z-index: 3; display: flex; align-items: center; gap: 7px; margin: 18px 0 24px; color: var(--ink-muted); font-size: 11px; font-weight: 560; }
.local-privacy span { width: 7px; height: 7px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 13%, transparent); }
.upload-zone .mode-switch {
  margin: 0;
  padding: 4px;
  border: 1px solid var(--line);
  background: var(--surface-control);
  box-shadow: none;
}
.upload-zone .mode-switch::after { display: none; }
.upload-zone .mode-switch::before { background: var(--surface-raised); box-shadow: var(--shadow-1); }
.upload-zone .mode-btn { min-height: 38px; padding: 8px 20px; color: var(--ink-soft); font-size: 13px; }
.upload-zone .mode-btn.active { color: var(--ink); text-shadow: none; }

/* Workbench surfaces */
.main-layout { grid-template-columns: minmax(0, 1fr) 344px; gap: 16px; }
.card, .video-inspector, .video-stage-column {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-1);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
}
.card { border-radius: var(--r-lg); transition: border-color 180ms ease, box-shadow 180ms ease; }
.card:hover { box-shadow: var(--shadow-1); border-color: var(--line-strong); }
.card::before { display: none; }
.card::after, .spotlight::after { display: none !important; }
.card-hd, .control-panel-header, .video-inspector-header {
  min-height: 56px;
  padding: 14px 18px;
  border-bottom: 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 650;
}
.card-hd::after, .video-inspector-header::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 8%, var(--line) 92%, transparent);
}
.card-bd { color: var(--ink); }
.preview-stack { min-width: 0; }
.preview-stack .card,
#controlPanel,
.setup-control-panel {
  border-color: var(--line) !important;
  background: var(--surface) !important;
  color: var(--ink) !important;
  box-shadow: var(--shadow-1) !important;
}
.preview-stack .card-hd,
#controlPanel .card-hd,
.setup-control-panel .card-hd {
  color: var(--ink) !important;
  background: transparent !important;
  border-color: var(--line) !important;
}
#controlPanel .card-bd,
.setup-control-panel .card-bd {
  color: var(--ink) !important;
  background: transparent !important;
}
#controlPanel .param-sec,
.setup-control-panel .param-sec {
  color: var(--ink) !important;
  background: transparent !important;
  border-color: var(--line) !important;
}
#controlPanel .param-label,
#controlPanel .inline-label,
.setup-control-panel .param-label,
.setup-control-panel .inline-label {
  color: var(--ink-soft) !important;
}
#controlPanel .param-label .muted,
.setup-control-panel .param-label .muted {
  color: var(--ink-muted) !important;
}
#controlPanel .segmented,
#controlPanel .single-mode-segment,
.setup-control-panel .segmented {
  border-color: var(--line) !important;
  background: var(--surface-control) !important;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--line) 45%, transparent) !important;
}
#controlPanel .segmented::before,
#controlPanel .single-mode-segment::before,
.setup-control-panel .segmented::before {
  background: var(--surface-raised) !important;
  box-shadow: var(--shadow-1) !important;
}
#controlPanel .segmented button,
#controlPanel .single-mode-segment button,
.setup-control-panel .segmented button {
  color: var(--ink-soft) !important;
  background: transparent !important;
  box-shadow: none !important;
}
#controlPanel .segmented button.active,
#controlPanel .single-mode-segment button.active,
.setup-control-panel .segmented button.active {
  color: var(--ink) !important;
}
#controlPanel .wm-drop-zone,
.setup-control-panel .wm-drop-zone,
#controlPanel .advanced-logo-drop {
  border-color: var(--line) !important;
  background: var(--surface-control) !important;
  color: var(--ink-soft) !important;
}
#controlPanel .btn-secondary,
.setup-control-panel .btn-secondary,
.control-panel-header .drag-toggle-btn {
  border-color: var(--line) !important;
  background: var(--surface-control) !important;
  color: var(--ink) !important;
  box-shadow: none !important;
}
#controlPanel .btn-primary,
.setup-control-panel .btn-primary {
  border-color: transparent !important;
  background: var(--accent) !important;
  color: #fff !important;
}
.preview-box, .video-stage {
  border: 1px solid rgba(255, 255, 255, .08);
  background: #111318;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .3), 0 10px 34px rgba(0, 0, 0, .12);
}
#singlePreview.preview-box,
#setupPreview.preview-box,
.detect-preview-box {
  border-color: rgba(255, 255, 255, .09) !important;
  background-color: #111318 !important;
  background-image: none !important;
  color: rgba(255, 255, 255, .66) !important;
}
.preview-box { border-radius: 16px; }
.preview-box .empty { color: rgba(255, 255, 255, .48); }
#controlPanel { top: 16px !important; max-height: calc(100dvh - 32px); }
.control-panel-header { position: relative; }
.drag-toggle-btn { min-height: 32px; border-color: var(--line); background: var(--surface-control); color: var(--ink-soft); }
.panel-action-dock, .video-export-dock {
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-solid) 88%, transparent);
  backdrop-filter: blur(20px) saturate(145%);
  -webkit-backdrop-filter: blur(20px) saturate(145%);
}

.btn {
  min-height: 44px;
  border-radius: 12px;
  border-color: var(--line);
  font-weight: 650;
  transition: transform 100ms ease-out, background 160ms ease, border-color 160ms ease, box-shadow 180ms ease, opacity 160ms ease;
}
.btn::before { display: none; }
.btn-primary {
  border-color: transparent;
  background: var(--accent);
  color: white;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 24%, transparent), inset 0 1px rgba(255, 255, 255, .2);
}
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 28%, transparent); }
.btn-secondary { border-color: var(--line); background: var(--surface-control); color: var(--ink); box-shadow: none; }
.btn-secondary:hover { border-color: var(--line-strong); background: var(--surface-control-hover); }
.btn:disabled { opacity: .42; box-shadow: none; }

input:not([type="range"]):not([type="color"]), select, textarea {
  border-color: var(--line) !important;
  background: var(--surface-control) !important;
  color: var(--ink) !important;
  box-shadow: none !important;
}
input::placeholder, textarea::placeholder { color: var(--ink-muted) !important; }
input:not([type="range"]):focus, select:focus, textarea:focus {
  border-color: color-mix(in srgb, var(--accent) 70%, transparent) !important;
  box-shadow: 0 0 0 3px var(--accent-soft) !important;
}
input[type="range"] { accent-color: var(--accent); }
.param-label, .video-field label, .video-section-label { color: var(--ink-soft) !important; }
.param-sec { border-color: var(--line) !important; }
.segmented, .single-mode-segment, .video-segmented {
  border-color: var(--line) !important;
  background: var(--surface-control) !important;
  box-shadow: none !important;
}
.segmented button { color: var(--ink-soft) !important; }
.segmented button.active { color: var(--ink) !important; }
.segmented::before { background: var(--surface-raised) !important; box-shadow: var(--shadow-1) !important; }
.segmented::after { display: none !important; }
.pos-cell { border-color: var(--line) !important; background: var(--surface-control) !important; }
.pos-cell.active { border-color: color-mix(in srgb, var(--accent) 62%, transparent) !important; background: var(--accent-soft) !important; }

/* Batch */
.batch-info {
  min-height: 58px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow-1);
  backdrop-filter: var(--material-blur);
}
.batch-info .info-text { color: var(--ink); font-size: 13px; }
.batch-info .info-text.muted { color: var(--ink-soft); }
.cat-grid { gap: 14px; }
.cat-card { border-color: var(--line) !important; background: var(--surface) !important; box-shadow: var(--shadow-1) !important; }
.cat-card:hover { transform: none !important; border-color: var(--line-strong) !important; }
.action-bar { position: sticky; bottom: 12px; z-index: 20; border: 1px solid var(--line); background: var(--surface-raised); box-shadow: var(--shadow-2); backdrop-filter: var(--material-blur); }
.progress-outer { background: var(--surface-control) !important; }
.progress-inner { background: var(--accent) !important; }

/* Video workstation */
body.has-video .app { max-width: 1440px; padding: 16px 20px 48px; }
.video-toolbar {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-1);
  backdrop-filter: var(--material-blur);
}
.video-toolbar-title strong, .video-toolbar-title span, .video-metadata { color: var(--ink) !important; }
.video-toolbar-title span, .video-metadata { color: var(--ink-soft) !important; }
.video-editor-grid { gap: 16px; border: 0; background: transparent; box-shadow: none; }
.video-stage-column, .video-inspector { border-radius: var(--r-lg); overflow: hidden; }
.video-player-controls, .video-timeline, .video-timeline-ruler, .video-timeline-row, .video-track-label {
  border-color: var(--line) !important;
  background: var(--canvas-elevated) !important;
  color: var(--ink-soft) !important;
}
.video-icon-btn { min-width: 44px; min-height: 44px; border-color: var(--line); background: var(--surface-control); color: var(--ink); }
.video-track { background: var(--surface-control) !important; }
.video-track-range { background: color-mix(in srgb, var(--accent) 58%, #183c69) !important; border-color: var(--accent) !important; }
.video-track-playhead { background: var(--accent) !important; }
.video-quality-card, .video-logo-drop { border-color: var(--line) !important; background: var(--surface-control) !important; color: var(--ink) !important; }

/* Dialogs and library */
.setup-overlay, .detect-overlay, .watermark-library-overlay {
  background: rgba(0, 0, 0, .38) !important;
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
}
.setup-panel, .detect-panel, .watermark-library-panel {
  border: 1px solid var(--line-strong) !important;
  background: var(--surface-solid) !important;
  color: var(--ink) !important;
  box-shadow: var(--shadow-2) !important;
  transform-origin: var(--modal-origin-x, 50%) var(--modal-origin-y, 50%);
}
.setup-overlay.show .setup-panel, .detect-overlay.show .detect-panel, .watermark-library-overlay:not([hidden]) .watermark-library-panel {
  animation: apple-material-in 320ms var(--motion-out) both;
}
.setup-hd, .detect-hd, .watermark-library-header { border-color: var(--line) !important; background: transparent !important; }
.setup-hd h3, .detect-hd h3, .watermark-library-header h2, .watermark-library-card-copy strong { color: var(--ink) !important; }
.watermark-library-header p, .watermark-library-summary, .watermark-library-card-copy small, .watermark-library-tools > label { color: var(--ink-soft) !important; }
.watermark-library-tools input, .watermark-library-tools select { border-color: var(--line) !important; background: var(--surface-control) !important; color: var(--ink) !important; }
.watermark-library-card { border-color: var(--line) !important; background: var(--surface-control) !important; }
.watermark-library-card:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 46%, var(--line)) !important; background: var(--surface-control-hover) !important; }
.close-btn { min-width: 44px; min-height: 44px; border-color: var(--line); background: var(--surface-control); color: var(--ink-soft); }
.detect-upload-zone { border-color: var(--line-strong) !important; background: var(--surface-control) !important; color: var(--ink-soft) !important; }
@keyframes apple-material-in {
  from { opacity: 0; transform: translate3d(0, 12px, 0) scale(.975); filter: blur(6px); }
  to { opacity: 1; transform: translate3d(0, 0, 0) scale(1); filter: blur(0); }
}

/* Intro keeps the brand moment, not a blocking movie. */
.brand-intro { color: var(--ink); background: var(--canvas); transition-duration: 360ms; pointer-events: auto; }
.brand-intro-wordmark { stroke: color-mix(in srgb, var(--accent) 70%, var(--ink)); filter: none; }
.brand-intro-product { color: var(--ink); text-shadow: none; }
.intro-word-light { --word-delay: 20ms; }
.intro-word-your { --word-delay: 180ms; }
.intro-word-time { --word-delay: 350ms; }
html.page-intro-run .brand-intro-wordmark .intro-word path { animation-duration: 190ms; }
html.page-intro-run .brand-intro-flourish { animation-duration: 320ms; animation-delay: 260ms; }
html.page-intro-run .brand-intro-aura { animation-duration: 700ms; }

.toast { border: 1px solid var(--line-strong); background: var(--surface-raised) !important; color: var(--ink); box-shadow: var(--shadow-2); }
.site-footer { color: var(--ink-muted); }
.footer-social { color: var(--ink-soft); }

/* The legacy entry screen used unusually specific selectors; keep the adaptive
   workstation authoritative without resorting to global !important rules. */
body:not(.has-file) .hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
  max-width: none;
  margin: 0 0 24px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow-1);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
}
body:not(.has-file) .hero-copy { max-width: none; }
body:not(.has-file) .hero .brand-logo { color: var(--ink-muted); font-size: 9px; letter-spacing: .12em; }
body:not(.has-file) .hero .main-title {
  margin: 0;
  color: var(--ink);
  -webkit-text-fill-color: currentColor;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.025em;
  text-shadow: none;
}
body:not(.has-file) .hero .tagline { color: var(--ink-soft); font-size: 13px; letter-spacing: 0; }
body:not(.has-file) .upload-zone {
  min-height: 450px;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 52px 32px 30px;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  box-shadow: var(--shadow-2);
  backdrop-filter: var(--material-blur);
  -webkit-backdrop-filter: var(--material-blur);
}
body:not(.has-file) .upload-zone::before,
body:not(.has-file) .upload-zone::after { display: none; }
body:not(.has-file) .upload-zone:hover {
  border-color: color-mix(in srgb, var(--accent) 48%, var(--line));
  background: color-mix(in srgb, var(--surface-raised) 90%, transparent);
  box-shadow: var(--shadow-2), 0 0 0 5px var(--accent-soft);
}
body:not(.has-file) .upload-zone .icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 22px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: none;
}
body:not(.has-file) .upload-zone .title {
  max-width: none;
  padding: 0;
  color: var(--ink);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -.025em;
  white-space: normal;
  text-shadow: none;
}
body:not(.has-file) .upload-zone .hint { color: var(--ink-soft); font-size: 14px; }
body:not(.has-file) .upload-zone .mode-switch {
  width: max-content;
  max-width: 100%;
  margin: 0;
  padding: 4px;
  border: 1px solid var(--line);
  background: var(--surface-control);
  box-shadow: none;
}
body:not(.has-file) .upload-zone .mode-switch::before { background: var(--surface-raised); box-shadow: var(--shadow-1); }
body:not(.has-file) .upload-zone .mode-btn { min-height: 38px; padding: 8px 20px; color: var(--ink-soft); font-size: 13px; }
body:not(.has-file) .upload-zone .mode-btn:hover { color: var(--ink); }
body:not(.has-file) .upload-zone .mode-btn.active { color: var(--ink); text-shadow: none; }

@media (max-width: 1100px) {
  .main-layout { grid-template-columns: 1fr; gap: 14px; }
  #controlPanel { max-height: none; }
  .video-editor-grid { gap: 14px; }
}

@media (max-width: 760px) {
  .app, body.has-file .app { padding: max(10px, env(safe-area-inset-top)) 10px calc(144px + env(safe-area-inset-bottom)); }
  body:not(.has-file) .app { padding: 12px 10px 76px; justify-content: flex-start; }
  .hero, body.has-file .hero { padding: 10px; margin-bottom: 10px; border-radius: 15px; }
  .hero-copy { gap: 8px; }
  .hero .tagline { display: none; }
  .theme-control-label { display: none; }
  .theme-option { min-width: 40px; min-height: 32px; padding-inline: 7px; font-size: 10px; }
  .brand-mark { width: 34px; height: 34px; font-size: 17px; }
  .hero .main-title, body.has-file .hero .main-title { font-size: 17px; }
  .hero .brand-logo, body.has-file .hero .brand-logo { font-size: 8px; }
  .upload-zone { min-height: calc(100dvh - 170px); padding: 42px 16px 24px; border-radius: 22px; }
  .upload-zone .icon { width: 62px; height: 62px; }
  .upload-zone .title { font-size: 25px; }
  .upload-zone .hint { max-width: 280px; font-size: 12px; }
  .upload-zone .mode-switch { width: 100%; }
  .upload-zone .mode-btn { flex: 1 1 0; min-width: 0; padding-inline: 6px; font-size: 11px; white-space: nowrap; }
  .upload-action { touch-action: manipulation; }
  body.has-file .segmented, body.has-file .single-mode-segment { min-height: 48px; }
  body.has-file .segmented button, body.has-file .single-mode-segment button { min-height: 44px !important; }
  input:not([type="range"]):not([type="color"]), select, textarea { min-height: 44px; font-size: 16px !important; }
  input[type="range"] { min-height: 44px; touch-action: pan-x; }
  body:not(.has-file) .hero { padding: 10px; margin-bottom: 10px; border-radius: 15px; }
  body:not(.has-file) .hero .main-title { font-size: 17px; }
  body:not(.has-file) .hero .tagline { display: none; }
  body:not(.has-file) .upload-zone { min-height: calc(100dvh - 170px); padding: 42px 16px 24px; border-radius: 22px; }
  body:not(.has-file) .upload-zone .icon { width: 62px; height: 62px; }
  body:not(.has-file) .upload-zone .title { font-size: 25px; }
  body:not(.has-file) .upload-zone .hint { max-width: 280px; font-size: 12px; }
  body:not(.has-file) .upload-zone .mode-switch { width: 100%; }
  body:not(.has-file) .upload-zone .mode-btn { flex: 1 1 0; min-width: 0; padding-inline: 6px; font-size: 11px; }
  .preview-stack .card-bd { padding-inline: 8px; }

  body.has-file #controlPanel.mobile-inspector-sheet:not(.floating-control-panel):not(.zoom-avoid-control-panel) {
    position: fixed !important;
    left: 8px !important;
    right: 8px !important;
    bottom: max(8px, env(safe-area-inset-bottom)) !important;
    top: auto !important;
    z-index: 5200 !important;
    width: auto !important;
    height: min(78dvh, 720px) !important;
    max-height: none !important;
    margin: 0 !important;
    overflow: hidden !important;
    border-radius: 22px !important;
    box-shadow: var(--shadow-2) !important;
    will-change: transform;
    touch-action: pan-x;
    transition: box-shadow 180ms ease;
  }
  #controlPanel.mobile-inspector-sheet .control-panel-header {
    min-height: 62px;
    padding: 22px 52px 12px 18px;
    cursor: grab;
    touch-action: none;
    user-select: none;
  }
  #controlPanel.mobile-inspector-sheet .control-panel-header::before {
    content: "";
    position: absolute;
    top: 7px;
    left: 50%;
    width: 36px;
    height: 5px;
    border-radius: 999px;
    background: var(--ink-muted);
    transform: translateX(-50%);
    opacity: calc(.55 + var(--sheet-progress, 0) * .2);
  }
  #controlPanel.mobile-inspector-sheet .control-panel-header::after {
    content: "上滑调整";
    position: absolute;
    right: 16px;
    top: 27px;
    width: auto;
    height: auto;
    background: none;
    color: var(--ink-muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .01em;
    transform: none;
    transition: opacity 160ms ease;
  }
  #controlPanel.mobile-inspector-sheet[data-sheet-state="expanded"] .control-panel-header::after { content: "下滑收起"; }
  #controlPanel.mobile-inspector-sheet[data-sheet-state="half"] .control-panel-header::after { content: "继续上滑"; }
  #controlPanel.mobile-inspector-sheet:focus-within { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)) !important; }
  #controlPanel.mobile-inspector-sheet.is-sheet-dragging .control-panel-header { cursor: grabbing; }
  body.has-file #controlPanel.mobile-inspector-sheet:not(.floating-control-panel):not(.zoom-avoid-control-panel) > .card-bd {
    height: calc(100% - 120px);
    max-height: none !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    overscroll-behavior: contain;
    padding-bottom: calc(88px + env(safe-area-inset-bottom));
    scroll-padding-bottom: calc(88px + env(safe-area-inset-bottom));
    -webkit-overflow-scrolling: touch;
  }
  #controlPanel.mobile-inspector-sheet .panel-action-dock {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    min-height: 62px;
    padding: 9px 12px calc(9px + env(safe-area-inset-bottom));
  }
  #controlPanel.mobile-inspector-sheet .panel-action-dock .btn { min-height: 48px; }
  #singleDragToggleBtn { display: none; }

  .setup-overlay, .detect-overlay, .watermark-library-overlay { padding: 0 !important; align-items: stretch !important; }
  .setup-panel, .detect-panel, .watermark-library-panel {
    width: 100% !important;
    height: 100dvh !important;
    max-height: none !important;
    border: 0 !important;
    border-radius: 0 !important;
  }
  .setup-body { overflow-y: auto; }
  body.has-video .app { padding: 8px 8px 40px; }
  .video-toolbar, .video-stage-column, .video-inspector { border-radius: 16px; }
  .action-bar { bottom: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  body { transition: none; }
  .brand-intro { display: none !important; }
  .setup-overlay.show .setup-panel, .detect-overlay.show .detect-panel, .watermark-library-overlay:not([hidden]) .watermark-library-panel {
    animation: apple-fade-in 160ms ease both;
  }
  button.is-pressed, .btn.is-pressed, [role="button"].is-pressed { transform: none !important; }
  @keyframes apple-fade-in { from { opacity: 0; } to { opacity: 1; } }
}

@media (prefers-reduced-transparency: reduce) {
  .hero, .upload-zone, .card, .batch-info, .video-toolbar, .video-stage-column, .video-inspector,
  .panel-action-dock, .video-export-dock, .setup-panel, .detect-panel, .watermark-library-panel {
    background: var(--surface-solid) !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

@media (prefers-contrast: more) {
  :root { --line: color-mix(in srgb, currentColor 34%, transparent); --line-strong: color-mix(in srgb, currentColor 54%, transparent); }
  .hero, .upload-zone, .card, .btn, input, select, textarea { border-width: 2px !important; }
  .surface, .hero, .card { background: var(--surface-solid) !important; }
}