/* ============================================================
   Smash Brain shared theme — v1 (2026-09-17)
   Source of truth for look and feel across Smash Brain apps:
   Smashboard, Smash Lists, Smash Math, Smash Lingo.
   Tokens are lifted from Smashboard's index.css (warm surfaces,
   BTC-orange primary, Satoshi + JetBrains Mono, 0.5rem radius).

   Usage: <link rel="stylesheet" href="./smashbrain-theme.css">
   then the app's own stylesheet. Apps consume tokens via
   hsl(var(--token)) and may use the primitives below (.sb-btn etc.)
   or map their own classes onto the same variables.
   Dark mode follows the OS (prefers-color-scheme); an app may force
   it with <html data-theme="dark"> or data-theme="light".
   ============================================================ */

@import url("https://api.fontshare.com/v2/css?f[]=satoshi@400,500,700,900&f[]=jetbrains-mono@400,500&display=swap");

:root {
  color-scheme: light dark;

  /* --- Surfaces: light (warm cream) --- */
  --background: 35 18% 96%;
  --foreground: 30 12% 12%;
  --border: 35 12% 86%;
  --card: 0 0% 100%;
  --card-foreground: 30 12% 12%;
  --card-border: 35 12% 88%;
  --popover: 35 16% 96%;
  --popover-foreground: 30 12% 12%;
  --muted: 35 14% 92%;
  --muted-foreground: 30 6% 42%;
  --secondary: 35 14% 90%;
  --secondary-foreground: 30 12% 14%;
  --accent: 35 14% 90%;
  --accent-foreground: 30 12% 14%;
  --input: 35 12% 80%;

  /* --- Primary: BTC orange --- */
  --primary: 32 95% 49%;
  --primary-foreground: 0 0% 100%;
  --destructive: 0 70% 45%;
  --destructive-foreground: 0 0% 98%;
  --ring: 32 95% 49%;

  /* --- Chart / data colours --- */
  --chart-1: 32 95% 49%;
  --chart-2: 188 70% 38%;
  --chart-3: 12 70% 50%;
  --chart-4: 43 80% 50%;
  --chart-5: 260 50% 55%;

  /* --- Type --- */
  --font-sans: "Satoshi", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Satoshi", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --text-xs: 0.75rem;   /* 12px  labels, meta */
  --text-sm: 0.875rem;  /* 14px  controls, secondary text */
  --text-base: 1rem;    /* 15px  body (html is 15px) */
  --text-lg: 1.125rem;  /* ~17px */
  --text-xl: 1.25rem;   /* ~19px  page title — max heading size in apps */
  --leading-tight: 1.25;
  --leading-normal: 1.45;
  --tracking-tight: -0.015em;
  --tracking-normal: 0em;

  /* --- Shape, depth, spacing --- */
  --radius: 0.5rem;
  --radius-sm: calc(var(--radius) - 2px);
  --radius-xs: 4px;
  --shadow-sm: 0 1px 2px hsl(30 30% 5% / 0.05);
  --shadow: 0 2px 6px hsl(30 30% 5% / 0.08);
  --shadow-md: 0 4px 12px hsl(30 30% 5% / 0.10);
  --shadow-lg: 0 12px 32px hsl(30 30% 5% / 0.14);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;

  /* --- Control sizing --- */
  --control-h: 2rem;        /* 30px desktop */
  --control-h-sm: 1.75rem;  /* 26px */
  --touch-min: 2.5rem;      /* 38px on coarse pointers */
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  /* --- Motion --- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 120ms;
  --dur: 180ms;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --background: 30 8% 7%;
    --foreground: 35 12% 92%;
    --border: 30 6% 18%;
    --card: 30 8% 10%;
    --card-foreground: 35 12% 92%;
    --card-border: 30 6% 16%;
    --popover: 30 8% 11%;
    --popover-foreground: 35 12% 92%;
    --muted: 30 6% 14%;
    --muted-foreground: 35 8% 65%;
    --secondary: 30 6% 16%;
    --secondary-foreground: 35 12% 92%;
    --accent: 30 6% 18%;
    --accent-foreground: 35 12% 92%;
    --input: 30 6% 22%;
    --primary: 32 95% 55%;
    --primary-foreground: 30 8% 7%;
    --destructive: 0 65% 50%;
    --ring: 32 95% 55%;
    --chart-1: 32 95% 60%;
    --chart-2: 188 60% 50%;
    --chart-3: 12 75% 60%;
    --chart-4: 43 80% 60%;
    --chart-5: 260 60% 65%;
    --shadow-sm: 0 1px 2px hsl(0 0% 0% / 0.3);
    --shadow: 0 2px 6px hsl(0 0% 0% / 0.4);
    --shadow-md: 0 4px 12px hsl(0 0% 0% / 0.4);
    --shadow-lg: 0 12px 32px hsl(0 0% 0% / 0.5);
  }
}
:root[data-theme="dark"] {
  --background: 30 8% 7%;
  --foreground: 35 12% 92%;
  --border: 30 6% 18%;
  --card: 30 8% 10%;
  --card-foreground: 35 12% 92%;
  --card-border: 30 6% 16%;
  --popover: 30 8% 11%;
  --popover-foreground: 35 12% 92%;
  --muted: 30 6% 14%;
  --muted-foreground: 35 8% 65%;
  --secondary: 30 6% 16%;
  --secondary-foreground: 35 12% 92%;
  --accent: 30 6% 18%;
  --accent-foreground: 35 12% 92%;
  --input: 30 6% 22%;
  --primary: 32 95% 55%;
  --primary-foreground: 30 8% 7%;
  --destructive: 0 65% 50%;
  --ring: 32 95% 55%;
  --shadow-sm: 0 1px 2px hsl(0 0% 0% / 0.3);
  --shadow: 0 2px 6px hsl(0 0% 0% / 0.4);
  --shadow-md: 0 4px 12px hsl(0 0% 0% / 0.4);
  --shadow-lg: 0 12px 32px hsl(0 0% 0% / 0.5);
}

@media (pointer: coarse) {
  :root {
    --control-h: var(--touch-min);
    --control-h-sm: 2.125rem;
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  min-height: 100%;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01" on, "ss02" on, "cv11" on;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
}
h1 { font-size: var(--text-xl); }
h2 { font-size: var(--text-lg); }
h3 { font-size: var(--text-base); }
code, kbd, .mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
:focus-visible {
  outline: 2px solid hsl(var(--ring) / 0.6);
  outline-offset: 1px;
}
::selection { background: hsl(var(--primary) / 0.25); }

/* ---------- Primitives (opt-in) ---------- */
.sb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: var(--control-h);
  padding: 0 0.75rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-sm);
  background: hsl(var(--card));
  color: hsl(var(--card-foreground));
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
  transition: background var(--dur-fast), border-color var(--dur-fast), opacity var(--dur-fast);
}
.sb-btn:hover { background: hsl(var(--muted)); }
.sb-btn:active { transform: translateY(1px); }
.sb-btn.primary {
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  border-color: transparent;
  font-weight: 700;
}
.sb-btn.primary:hover { filter: brightness(1.06); background: hsl(var(--primary)); }
.sb-btn.ghost {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  color: hsl(var(--muted-foreground));
}
.sb-btn.ghost:hover { background: hsl(var(--muted)); color: hsl(var(--foreground)); }
.sb-btn.outline { background: transparent; box-shadow: none; }
.sb-btn.danger { color: hsl(var(--destructive)); }
.sb-btn.danger:hover { background: hsl(var(--destructive) / 0.10); }
.sb-btn.sm { min-height: var(--control-h-sm); padding: 0 0.55rem; font-size: var(--text-xs); }
.sb-btn.icon { width: var(--control-h); padding: 0; }
.sb-btn.icon.sm { width: var(--control-h-sm); }
.sb-btn svg { width: 1em; height: 1em; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.sb-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.sb-chip {
  display: inline-flex;
  align-items: center;
  min-height: var(--control-h-sm);
  padding: 0 0.65rem;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-sm);
  background: hsl(var(--card));
  color: hsl(var(--muted-foreground));
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.sb-chip:hover { color: hsl(var(--foreground)); background: hsl(var(--muted)); }
.sb-chip.on, .sb-chip[aria-selected="true"], .sb-chip[aria-pressed="true"] {
  background: hsl(var(--primary));
  border-color: transparent;
  color: hsl(var(--primary-foreground));
  font-weight: 700;
}

.sb-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-xs);
  background: hsl(var(--primary));
  color: hsl(var(--primary-foreground));
  font-size: var(--text-xs);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}
.sb-badge.muted { background: hsl(var(--muted)); color: hsl(var(--muted-foreground)); }

.sb-card {
  background: hsl(var(--card));
  color: hsl(var(--card-foreground));
  border: 1px solid hsl(var(--card-border));
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.sb-input, .sb-select, .sb-textarea {
  min-height: var(--control-h);
  padding: 0 0.6rem;
  border: 1px solid hsl(var(--input));
  border-radius: var(--radius-sm);
  background: hsl(var(--card));
  color: hsl(var(--foreground));
  font-size: var(--text-sm);
}
.sb-textarea { padding: 0.45rem 0.6rem; resize: vertical; }
.sb-input:focus, .sb-select:focus, .sb-textarea:focus {
  outline: 2px solid hsl(var(--ring) / 0.35);
  outline-offset: 0;
  border-color: hsl(var(--ring));
}

.sb-muted { color: hsl(var(--muted-foreground)); }
.sb-text-xs { font-size: var(--text-xs); }
.sb-text-sm { font-size: var(--text-sm); }

/* Horizontal scroller for chip/tab rows on narrow screens */
.sb-scroll-x {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}
.sb-scroll-x::-webkit-scrollbar { display: none; }
.sb-scroll-x > * { scroll-snap-align: start; flex-shrink: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}