:root {
  --brand: #ff7300;
  --brand-hover: #ea6a00;
  --brand-press: #d25f00;
  --brand-ink: #ffffff;
  --brand-soft: rgba(255, 115, 0, 0.10);
  --brand-softer: rgba(255, 115, 0, 0.05);
  --brand-ring: rgba(255, 115, 0, 0.30);
  --brand-glow: rgba(255, 115, 0, 0.22);

  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;

  --bg: var(--slate-50);
  --surface: #ffffff;
  --surface-2: var(--slate-50);
  --surface-3: var(--slate-100);
  --surface-inset: var(--slate-100);

  --text: var(--slate-900);
  --text-2: var(--slate-600);
  --text-3: var(--slate-400);
  --text-inv: #ffffff;

  --border: var(--slate-200);
  --border-soft: rgba(15, 23, 42, 0.06);
  --border-strong: var(--slate-300);

  --ok: #15803d;
  --ok-soft: #dcfce7;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --danger: #b91c1c;
  --danger-soft: #fee2e2;
  --info: #1d4ed8;
  --info-soft: #dbeafe;

  --tier-s: #f59e0b;
  --tier-s-soft: #fef3c7;
  --tier-a: #ef4444;
  --tier-a-soft: #fee2e2;
  --tier-b: #ff7300;
  --tier-b-soft: rgba(255, 115, 0, 0.12);
  --tier-c: #3b82f6;
  --tier-c-soft: #dbeafe;
  --tier-d: #64748b;
  --tier-d-soft: #f1f5f9;

  --gold: #eab308;
  --gold-soft: #fef9c3;
  --silver: #94a3b8;
  --silver-soft: #f1f5f9;
  --bronze: #c2703f;
  --bronze-soft: #fdebd8;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Consolas, monospace;

  /* Dense leaderboard type — small but scannable. */
  --fs-micro: 9px;
  --fs-tiny: 10px;
  --fs-xs: 11px;
  --fs-sm: 12px;
  --fs-md: 13px;
  --fs-lg: 15px;
  --fs-xl: 18px;
  --fs-2xl: 24px;
  --fs-3xl: 32px;
  --fs-4xl: 42px;

  --lh-tight: 1.15;
  --lh-snug: 1.35;
  --lh-normal: 1.55;

  --ls-eyebrow: 0.14em;
  --ls-tag: 0.08em;
  --ls-tight: -0.02em;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 800;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 40px;
  --sp-8: 56px;
  --sp-9: 72px;

  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 18px;
  --r-xl: 26px;
  --r-pill: 999px;

  --shadow-hair: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05), 0 2px 6px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 2px 4px rgba(15, 23, 42, 0.05), 0 8px 20px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 4px 10px rgba(15, 23, 42, 0.06), 0 18px 40px rgba(15, 23, 42, 0.10);
  --shadow-xl: 0 10px 20px rgba(15, 23, 42, 0.08), 0 30px 66px rgba(15, 23, 42, 0.14);
  --shadow-brand: 0 2px 6px rgba(255, 115, 0, 0.28), 0 10px 24px rgba(255, 115, 0, 0.26);
  --shadow-focus: 0 0 0 3px var(--brand-ring);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 120ms;
  --t-base: 200ms;
  --t-slow: 340ms;
  --t-slower: 560ms;

  --shell-max: 1240px;
  --header-h: 62px;
  --row-h: 44px;
  --z-header: 100;
  --z-drawer: 800;
  --z-loader: 900;
  --z-toast: 1000;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: var(--slate-950);
    --surface: #0b1220;
    --surface-2: var(--slate-900);
    --surface-3: #16233b;
    --surface-inset: #16233b;

    --text: var(--slate-100);
    --text-2: var(--slate-400);
    --text-3: var(--slate-500);

    --border: #1e2c47;
    --border-soft: rgba(255, 255, 255, 0.07);
    --border-strong: #2b3b५a;
    --border-strong: #2b3b5a;

    --ok-soft: rgba(21, 128, 61, 0.18);
    --warn-soft: rgba(180, 83, 9, 0.20);
    --danger-soft: rgba(185, 28, 28, 0.20);
    --info-soft: rgba(29, 78, 216, 0.20);

    --tier-s-soft: rgba(245, 158, 11, 0.16);
    --tier-a-soft: rgba(239, 68, 68, 0.16);
    --tier-b-soft: rgba(255, 115, 0, 0.16);
    --tier-c-soft: rgba(59, 130, 246, 0.16);
    --tier-d-soft: rgba(100, 116, 139, 0.18);

    --gold-soft: rgba(234, 179, 8, 0.16);
    --silver-soft: rgba(148, 163, 184, 0.16);
    --bronze-soft: rgba(194, 112, 63, 0.16);

    --shadow-hair: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.42), 0 8px 20px rgba(0, 0, 0, 0.38);
    --shadow-lg: 0 4px 10px rgba(0, 0, 0, 0.45), 0 18px 40px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 10px 20px rgba(0, 0, 0, 0.5), 0 30px 66px rgba(0, 0, 0, 0.6);

    color-scheme: dark;
  }
}

:root[data-theme='dark'] {
  --bg: var(--slate-950);
  --surface: #0b1220;
  --surface-2: var(--slate-900);
  --surface-3: #16233b;
  --surface-inset: #16233b;

  --text: var(--slate-100);
  --text-2: var(--slate-400);
  --text-3: var(--slate-500);

  --border: #1e2c47;
  --border-soft: rgba(255, 255, 255, 0.07);
  --border-strong: #2b3b5a;

  --ok-soft: rgba(21, 128, 61, 0.18);
  --warn-soft: rgba(180, 83, 9, 0.20);
  --danger-soft: rgba(185, 28, 28, 0.20);
  --info-soft: rgba(29, 78, 216, 0.20);

  --tier-s-soft: rgba(245, 158, 11, 0.16);
  --tier-a-soft: rgba(239, 68, 68, 0.16);
  --tier-b-soft: rgba(255, 115, 0, 0.16);
  --tier-c-soft: rgba(59, 130, 246, 0.16);
  --tier-d-soft: rgba(100, 116, 139, 0.18);

  --gold-soft: rgba(234, 179, 8, 0.16);
  --silver-soft: rgba(148, 163, 184, 0.16);
  --bronze-soft: rgba(194, 112, 63, 0.16);

  --shadow-hair: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.42), 0 8px 20px rgba(0, 0, 0, 0.38);
  --shadow-lg: 0 4px 10px rgba(0, 0, 0, 0.45), 0 18px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 10px 20px rgba(0, 0, 0, 0.5), 0 30px 66px rgba(0, 0, 0, 0.6);

  color-scheme: dark;
}

:root[data-theme='light'] { color-scheme: light; }

*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  line-height: var(--lh-normal);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background var(--t-base) var(--ease-out), color var(--t-base) var(--ease-out);
}

img, svg { display: block; max-width: 100%; }

[hidden] { display: none !important; }

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: none; cursor: pointer; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

table { border-collapse: collapse; border-spacing: 0; }

:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--r-sm);
}

::selection { background: var(--brand-ring); color: var(--text); }

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--fs-micro);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--text-3);
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border: 2px solid transparent;
  background-clip: content-box;
  border-radius: var(--r-pill);
}
*::-webkit-scrollbar-thumb:hover { background: var(--text-3); background-clip: content-box; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}