:root {
  color-scheme: dark;
  --media-bg: #101113;
  --media-surface: #191b1f;
  --media-overlay: rgba(8, 10, 14, .76);
  --library-art-sheen: rgba(255, 255, 255, .12);
  --media-text: #f6f6f7;
  --media-muted: #b5b7bd;
  --media-accent: #f3f3f5;
  --media-on-accent: #151619;
  --media-card-radius: 6px;
  --media-motion-fast: 160ms ease;
  --media-motion-normal: 280ms ease;
  --media-shadow: 0 16px 36px #0008;
  --bg: #0f1115;
  --surface: #171a1f;
  --surface-2: #1e2229;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f5f7fa;
  --text-secondary: #9aa2ad;
  --accent: #2997ff;
  --success: #30d158;
  --danger: #ff453a;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro", "Segoe UI", sans-serif;
  --settings-heading-size: 21px;
  --settings-section-heading-size: 18px;
  --settings-sheet-heading-size: 17px;
  --settings-heading-weight: 600;
  --settings-input-size: 16px;
  --settings-button-size: 15px;
  --settings-label-size: 15px;
  --settings-label-weight: 400;
  --settings-line-height: 1.5;
  --settings-help-size: 13px;
  --settings-help-weight: 400;
  --settings-help-gap: 2px;
  --settings-option-gap: 16px;
  --radius-button: 12px;
  --radius-input: 13px;
  --radius-poster: 14px;
  --radius-surface: 18px;
  --radius-library: 20px;
  --radius-modal: 24px;
  --radius-sheet: 26px;
  --radius-account-menu: 22px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --shadow: 0 16px 48px #0004;
  --motion: 160ms ease;
  --choice-duration: 160ms;
  --choice-ease: ease-out;
  --choice-radius: 18px;
  --choice-hover-opacity: .65;
  --choice-disabled-opacity: .45;
  --choice-blur: 18px;
  --choice-saturation: 160%;
  --choice-fill: rgba(255,255,255,0.06);
  --choice-press-fill: rgba(255,255,255,0.09);
  --choice-edge-width: 1px;
  --choice-edge: rgba(255,255,255,0.14);
  --choice-focus: rgba(220,232,245,.58);
  --choice-shadow: inset 0 1px 0 rgba(255,255,255,0.16), 0 4px 16px rgba(0,0,0,0.10);
  --sheet-duration: 280ms;
  --sheet-ease: cubic-bezier(.2,.75,.25,1);
  --sheet-backdrop: rgba(0,0,0,.30);
  --sheet-backdrop-blur: blur(12px);
  --button-height: 44px;
  --input-height: 46px;
  /* GlassCard material: surfaces stay cheap; only floating layers blur. */
  --glass-tint: 23, 26, 31;
  --glass-border: rgba(255,255,255,.10);
  --glass-shadow: 0 8px 24px #0002;
  --glass-surface-opacity: .72;
  --glass-card-opacity: .62;
  --glass-art-opacity: .68;
  --glass-nav-opacity: .64;
  --glass-dialog-opacity: .72;
  --glass-card-blur: 12px;
  --glass-nav-blur: 8px;
  --glass-dialog-blur: 16px;
  --panel: var(--surface);
  --muted: var(--text-secondary);
}
:root[data-theme="light"] {
  --glass-art-opacity: .75;
  color-scheme: light;
  --media-bg: #f3f2ef;
  --media-surface: #fff;
  --media-overlay: rgba(243, 242, 239, .85);
  --library-art-sheen: rgba(255, 255, 255, .28);
  --media-text: #191a1d;
  --media-muted: #575b65;
  --media-accent: #24262b;
  --media-on-accent: #fff;
  --media-shadow: 0 16px 36px #17203030;
  --choice-fill: rgba(255,255,255,0.18);
  --choice-press-fill: rgba(255,255,255,0.22);
  --choice-focus: rgba(48,65,85,.52);
  --glass-tint: 255, 255, 255;
  --glass-border: rgba(0,0,0,.09);
  --glass-shadow: 0 8px 24px #17203010;
  --bg: #f2f3f7;
  --surface: #ffffff;
  --surface-2: #e9ecf2;
  --border: rgba(0, 0, 0, 0.09);
  --text: #171a1f;
  --text-secondary: #626b78;
  --accent: #087bd9;
  --success: #208a40;
  --danger: #d82d26;
  --shadow: 0 16px 48px #17203016;
}

/* Explicit low-cost mode also works on browsers without these media features. */
:root[data-glass="reduced"] {
  --glass-surface-opacity: 1;
  --glass-render: none;
  --glass-card-opacity: 1;
  --glass-art-opacity: 1;
  --glass-nav-opacity: 1;
  --glass-dialog-opacity: 1;
  --glass-card-blur: 0px;
  --glass-nav-blur: 0px;
  --glass-dialog-blur: 0px;
  --choice-blur: 0px;
  --sheet-backdrop-blur: none;
}
@media (prefers-reduced-transparency: reduce), (prefers-reduced-motion: reduce), (update: slow) {
  :root {
    --glass-surface-opacity: 1;
    --glass-render: none;
    --glass-card-opacity: 1;
    --glass-art-opacity: 1;
    --glass-nav-opacity: 1;
    --glass-dialog-opacity: 1;
    --glass-card-blur: 0px;
    --glass-nav-blur: 0px;
    --glass-dialog-blur: 0px;
    --choice-blur: 0px;
    --sheet-backdrop-blur: none;
  }
}