:root[data-theme] {
  --b1x-font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  --b1x-radius-sm: 14px;
  --b1x-radius-panel: 20px;
  --b1x-radius-composer: 26px;
  --b1x-blur: 20px;
  --b1x-duration: 180ms;
  --b1x-easing: cubic-bezier(.2, .7, .25, 1);
}

:root[data-theme="light"] {
  color-scheme: light;
  --b1x-bg: #f1f5fa;
  --b1x-bg-image: url('/web/assets/liquid-glass/light-scene-v2.png');
  --b1x-text: #132d40;
  --b1x-muted: #4c6579;
  --b1x-accent: #00778b;
  --b1x-accent-hover: #005e70;
  --b1x-on-accent: #ffffff;
  --b1x-focus: #004bb8;
  --b1x-success: #00785d;
  --b1x-border: rgba(0, 0, 0, 0.08);
  --b1x-border-subtle: rgba(0, 0, 0, 0.04);
  --b1x-edge: rgba(0, 0, 0, 0.10);
  --b1x-sheen: rgba(255, 255, 255, 0.75);
  --b1x-sheen-tail: rgba(180, 220, 255, 0.15);
  --b1x-solid: #ffffff;
  --b1x-solid-strong: #f7faff;
  --b1x-solid-weak: #e4f0fc;
  --b1x-glass: #ffffff;
  --b1x-glass-strong: #ffffff;
  --b1x-glass-weak: rgba(255, 255, 255, 0.48);
  --b1x-control: #eaf2f8;
  --b1x-selection: rgba(0, 102, 238, 0.12);
  --b1x-shadow: none;
  --b1x-primary-shadow: none;
  --workspace-secondary: #7150b5;
  --control-fill: #eaf2f8;
  --control-hover: #dceaf3;
  --control-pressed: #cce1ec;
  --control-border: #b4c8d7;
  --control-ink: #132d40;
  --control-accent: #00778b;
  --control-accent-hover: #005e70;
  --b1x-ambient-a: rgba(124, 192, 255, 0.50);
  --b1x-ambient-b: rgba(169, 206, 255, 0.36);
  --b1x-orb-edge: rgba(255, 255, 255, 0.95);
  --b1x-orb-light: rgba(255, 255, 255, 0.84);
  --b1x-orb-tint: rgba(83, 167, 243, 0.20);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --b1x-bg: #06101b;
  --b1x-bg-image: url('/web/assets/liquid-glass/dark-scene-v2.png');
  --b1x-text: #e8f1fa;
  --b1x-muted: #a3b8cb;
  --b1x-accent: #00d9ef;
  --b1x-accent-hover: #5ee9f4;
  --b1x-on-accent: #03222c;
  --b1x-focus: #00e5ff;
  --b1x-success: #15ddb0;
  --b1x-border: rgba(255, 255, 255, 0.07);
  --b1x-border-subtle: rgba(255, 255, 255, 0.04);
  --b1x-edge: rgba(255, 255, 255, 0.12);
  --b1x-sheen: rgba(255, 255, 255, 0.08);
  --b1x-sheen-tail: rgba(255, 255, 255, 0.02);
  --b1x-solid: #0a1928;
  --b1x-solid-strong: #071421;
  --b1x-solid-weak: #07192f;
  --b1x-glass: rgba(10, 25, 40, 0.65);
  --b1x-glass-strong: rgba(12, 30, 46, 0.85);
  --b1x-glass-weak: rgba(6, 24, 46, 0.50);
  --b1x-control: rgba(16, 37, 54, 0.75);
  --b1x-selection: rgba(0, 229, 255, 0.15);
  --b1x-shadow: none;
  --b1x-primary-shadow: none;
  --workspace-secondary: #b69aff;
  --b1x-ambient-a: rgba(0, 180, 255, 0.45);
  --b1x-ambient-b: rgba(0, 80, 180, 0.35);
  --b1x-orb-edge: rgba(0, 229, 255, 0.65);
  --b1x-orb-light: rgba(130, 235, 255, 0.70);
  --b1x-orb-tint: rgba(0, 180, 255, 0.25);
}

/* Semantic tokens shared by workspace */
:root {
  --bg: var(--b1x-bg);
  --bg-image: var(--b1x-bg-image);
  --text: var(--b1x-text);
  --text-bright: var(--b1x-text);
  --muted: var(--b1x-muted);
  --muted-soft: var(--b1x-muted);
  --cyan: var(--b1x-accent);
  --on-accent: var(--b1x-on-accent);
  --cyan-glow: var(--b1x-selection);
  --green: var(--b1x-success);
  --panel: var(--b1x-solid);
  --raised: var(--b1x-solid-strong);
  --hover: var(--b1x-selection);
  --surface-strong: var(--b1x-solid-strong);
  --surface-soft: var(--b1x-solid-weak);
  --line: var(--b1x-border);
  --line-light: var(--b1x-border-subtle);
  --line-active: var(--b1x-accent);
  --border: var(--line);
  --line-specular: inset 0 1px 0 var(--b1x-edge);
  --glass-shadow: var(--line-specular), var(--b1x-shadow);
  --glass-glow: 0 0 20px var(--cyan-glow);
  --glass-blur: blur(24px) saturate(140%);
  --surface-sheen: linear-gradient(135deg, var(--b1x-sheen), transparent 38%, transparent 72%, var(--b1x-sheen-tail));
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-ui: var(--sans);
  --mono: 'Cascadia Code', Consolas, Menlo, monospace;
  --sidebar: 244px;
  --inspector: 268px;
  --header: 68px;
  --radius-sm: 14px;
  --radius-md: 20px;
  --radius-lg: 26px;
  --radius-pill: 9999px;
  --font-size-base: 13.5px;
  --font-size-code: 12px;
  --font-size-sm: 12px;
  --fast: 180ms;
  --fluid: 180ms ease;
  --ease-spring: cubic-bezier(.2, .7, .25, 1);
  --companion-neon: var(--cyan);
  --companion-aura: 0 0 18px var(--cyan-glow);
  --liquid-bg-radial: none;
  --code-bg: var(--surface-strong);
}
:root[data-theme="dark"] { --theme-mode: dark; --purple: #c4a4ff; --amber: #fbbf24; --red: #fda4af; }
:root[data-theme="light"] { --theme-mode: light; --purple: #6d28d9; --amber: #8c4806; --red: #b4233d; }
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  :root { --panel: var(--b1x-glass); --raised: var(--b1x-control); --glass-blur: blur(24px) saturate(140%); }
}
@media (prefers-reduced-transparency: reduce) {
  :root { --panel: var(--b1x-solid); --raised: var(--b1x-solid-strong); --glass-blur: none; --surface-sheen: none; }
}
@media (prefers-reduced-motion: reduce) { :root { --fast: 0ms; --fluid: 0ms; } }
@media (forced-colors: active) {
  :root { --bg: Canvas; --panel: Canvas; --raised: Canvas; --surface-strong: Canvas; --surface-soft: Canvas; --text: CanvasText; --text-bright: CanvasText; --muted: CanvasText; --muted-soft: CanvasText; --line: ButtonText; --line-light: ButtonText; --line-active: Highlight; --cyan: LinkText; --on-accent: Canvas; --glass-blur: none; --surface-sheen: none; --glass-shadow: none; }
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: var(--font-size-base)/1.6 var(--sans);
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
button, input, textarea, select {
  font: inherit;
  color: inherit;
}
button, a, input, textarea, select {
  -webkit-tap-highlight-color: transparent;
}
button, select {
  cursor: pointer;
}
button {
  border: 1px solid var(--line);
  background: transparent;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  transition: background var(--fast), border-color var(--fast), color var(--fast), transform var(--fast), box-shadow var(--fast);
}
button:hover {
  background: var(--hover);
  border-color: var(--line-light);
}
button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
a {
  color: inherit;
  text-decoration: none;
}
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
textarea, input, select {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}
textarea {
  resize: none;
}
button[hidden], [hidden] {
  display: none !important;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.mono, kbd {
  font-family: var(--mono);
}
.muted {
  color: var(--muted);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}
.skip {
  position: fixed;
  top: -60px;
  left: 15px;
  z-index: 100;
  background: var(--raised);
  padding: 12px;
}
.skip:focus {
  top: 10px;
}
* {
  scrollbar-width: thin;
  scrollbar-color: var(--muted-soft) transparent;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* Water Gesture & Tap Interaction */
.liquid-touch-ring {
  position: fixed;
  pointer-events: none;
  width: 20px;
  height: 20px;
  margin-left: -10px;
  margin-top: -10px;
  border-radius: 50%;
  border: 1.5px solid var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow), inset 0 0 8px var(--cyan-glow);
  z-index: 9999;
  animation: liquidWaterTapRing 650ms cubic-bezier(0.1, 0.8, 0.25, 1) forwards;
}

@keyframes liquidWaterTapRing {
  0% {
    transform: scale(0.6);
    opacity: 0.95;
  }
  50% {
    opacity: 0.65;
  }
  100% {
    transform: scale(4.8);
    opacity: 0;
  }
}

/* Jelly bounce when tapped like flexible liquid acrylic / water droplet */
.liquid-gesture {
  animation: liquidCardTap 420ms cubic-bezier(0.2, 0.85, 0.25, 1);
}

@keyframes liquidCardTap {
  0% {
    transform: scale(1);
  }
  30% {
    transform: scale3d(0.965, 0.975, 1);
  }
  60% {
    transform: scale3d(1.02, 1.015, 1);
  }
  80% {
    transform: scale3d(0.992, 0.995, 1);
  }
  100% {
    transform: scale(1);
  }
}