/* ==========================================================================
   Dealer Training — design tokens, base, layout
   ========================================================================== */

:root {
  /* Surfaces — deep anthracite, warm undertone */
  --bg: #0d0d0e;
  --bg-sunken: #0a0a0b;
  --surface: #151516;
  --surface-2: #1b1b1c;
  --surface-3: #232324;

  /* Lines */
  --line: rgba(237, 230, 214, 0.07);
  --line-2: rgba(237, 230, 214, 0.12);
  --line-3: rgba(237, 230, 214, 0.2);

  /* Text — warm ivory to warm grey */
  --ivory: #ede6d6;
  --text: #e4ddcd;
  --text-2: #a29d93;
  --text-3: #6d6a64;

  /* Accent — champagne bronze */
  --accent: #c2a27a;
  --accent-hi: #d6bc97;
  --accent-lo: #8f7656;
  --accent-wash: rgba(194, 162, 122, 0.1);
  --accent-line: rgba(194, 162, 122, 0.32);

  /* Signals — muted, never loud */
  --positive: #93a98a;
  --positive-wash: rgba(147, 169, 138, 0.12);
  --negative: #c47f6f;
  --negative-wash: rgba(196, 127, 111, 0.12);

  /* Table felt, for later modules */
  --felt: #13201b;

  /* Type */
  --font-display: "Cormorant Garamond", "Cormorant", Georgia, "Times New Roman", serif;
  --font-ui: "DM Sans", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --fs-micro: 0.6875rem;   /* 11 */
  --fs-small: 0.8125rem;   /* 13 */
  --fs-body: 0.9375rem;    /* 15 */
  --fs-lead: 1.0625rem;    /* 17 */
  --fs-h3: 1.375rem;       /* 22 */
  --fs-h2: 1.875rem;       /* 30 */
  --fs-h1: clamp(2.25rem, 1.6rem + 2.6vw, 3.75rem);
  --fs-figure: clamp(2.25rem, 1.9rem + 1.2vw, 3rem);

  --tracking-caps: 0.16em;

  /* Space (4px base) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --shadow-1: 0 1px 0 rgba(255, 255, 255, 0.02) inset, 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-2: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 12px 32px -12px rgba(0, 0, 0, 0.6);

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-1: 120ms;
  --dur-2: 220ms;
  --dur-3: 480ms;

  --sidebar-w: 264px;
  --rail-w: 76px;
  --tabbar-h: 64px;
  --content-max: 1240px;

  color-scheme: dark;
}

/* --------------------------------------------------------------------------
   Reset & base
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: var(--fs-body);
  line-height: 1.55;
  font-optical-sizing: auto;
  font-variant-numeric: lining-nums; /* "Player 1" never reads as "Player I" in the display font */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent-line); color: var(--ivory); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

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

.skip-link {
  position: fixed;
  top: var(--s-3); left: var(--s-3);
  z-index: 100;
  padding: var(--s-2) var(--s-4);
  background: var(--ivory);
  color: var(--bg);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transform: translateY(-200%);
  transition: transform var(--dur-2) var(--ease);
}
.skip-link:focus { transform: none; }

.noscript { padding: var(--s-7); text-align: center; color: var(--text-2); }

/* --------------------------------------------------------------------------
   Typography primitives
   -------------------------------------------------------------------------- */

.display {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.02;
  color: var(--ivory);
}

.figure {
  font-family: var(--font-display);
  font-weight: 500;
  font-variant-numeric: lining-nums tabular-nums;
  line-height: 1;
  color: var(--ivory);
  letter-spacing: -0.01em;
}

.eyebrow {
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-3);
}
.eyebrow--accent { color: var(--accent); }

.muted { color: var(--text-2); }
.faint { color: var(--text-3); }
.num { font-variant-numeric: tabular-nums; }

/* --------------------------------------------------------------------------
   Shell layout
   -------------------------------------------------------------------------- */

.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100dvh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
  padding: var(--s-6) var(--s-4) var(--s-5);
  background: var(--bg-sunken);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  scrollbar-width: none;
}
.sidebar::-webkit-scrollbar { display: none; }

.main {
  min-width: 0;
  padding: var(--s-7) clamp(var(--s-5), 4vw, var(--s-8)) var(--s-9);
}

.view {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* Tablet — icon rail */
@media (max-width: 1179px) {
  .shell { grid-template-columns: var(--rail-w) minmax(0, 1fr); }
  .sidebar { padding: var(--s-5) var(--s-3); align-items: center; }
}

/* Mobile — bottom tab bar */
@media (max-width: 767px) {
  .shell { display: block; }
  .sidebar { display: none; }
  .main {
    padding: var(--s-5) var(--s-4) calc(var(--tabbar-h) + var(--s-7) + env(safe-area-inset-bottom));
  }
}

/* --------------------------------------------------------------------------
   Grid helpers
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--s-4);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}
.span-12 { grid-column: span 12; }
.span-8 { grid-column: span 8; }
.span-7 { grid-column: span 7; }
.span-6 { grid-column: span 6; }
.span-5 { grid-column: span 5; }
.span-4 { grid-column: span 4; }
.span-3 { grid-column: span 3; }

@media (max-width: 1023px) {
  .span-8, .span-7, .span-6, .span-5, .span-4 { grid-column: span 12; }
  .span-3 { grid-column: span 6; }
}
@media (max-width: 479px) {
  .grid { gap: var(--s-3); }
}

.stack { display: flex; flex-direction: column; }
.stack-2 { gap: var(--s-2); }
.stack-3 { gap: var(--s-3); }
.stack-4 { gap: var(--s-4); }
.stack-5 { gap: var(--s-5); }
.stack-6 { gap: var(--s-6); }
.stack-7 { gap: var(--s-7); }

.row { display: flex; align-items: center; }
.row-2 { gap: var(--s-2); }
.row-3 { gap: var(--s-3); }
.row-4 { gap: var(--s-4); }
.between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1 1 auto; min-width: 0; }

/* Two equal columns at every width */
.grid-2 {
  display: grid;
  gap: var(--s-4);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (max-width: 479px) {
  .grid-2 { gap: var(--s-3); }
}

/* On narrow layouts, surface the session panel before the detail column */
@media (max-width: 1023px) {
  .order-first-narrow { order: -1; }
}