/* ============================================================================
   TAO Training — design system
   Near-black, gold, white. Modern editorial: hairlines, negative space,
   tight display type, wide-tracked micro labels.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* surfaces ------------------------------------------------------------- */
  --bg:          #08090B;
  --bg-raised:   #0D0F13;
  --bg-elev:     #12151A;
  --bg-hover:    #171B21;

  /* hairlines ------------------------------------------------------------ */
  --line:        rgba(255, 255, 255, .07);
  --line-strong: rgba(255, 255, 255, .13);
  --line-gold:   rgba(201, 162, 77, .28);

  /* gold ----------------------------------------------------------------- */
  --gold:        #C9A24D;
  --gold-bright: #EBCE86;
  --gold-dim:    #7E663A;
  --gold-glow:   rgba(201, 162, 77, .14);

  /* text ----------------------------------------------------------------- */
  --text:        #F4F4F6;
  --text-dim:    #8B909A;
  --text-faint:  #565B65;

  /* accents for data ----------------------------------------------------- */
  --move:        #4A9EFF;
  --attack:      #FF8C42;
  --danger:      #FF4D4D;
  --ok:          #3FCF8E;

  --radius:      3px;
  --radius-lg:   6px;

  --ease:        cubic-bezier(.22, .61, .36, 1);
  --nav-h:       64px;
  --maxw:        1240px;
}

/* reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  /*
   * Sticky footer. mountChrome() lays the body out as nav / main / footer, so
   * a flex column plus `margin-top:auto` on the footer parks it at the bottom
   * of the VIEWPORT whenever the page is shorter than one, instead of riding
   * up under short content. Without this the footer jumps every time a panel
   * changes height -- switching the Play page's sidebar between its settings
   * and thinking faces, for instance.
   *
   * dvh rather than vh so a mobile browser's collapsing URL bar does not leave
   * a strip of background under the footer.
   */
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.1; letter-spacing: -.03em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--gold); color: #0A0A0A; }

/* ambient glow — one soft gold wash at the top of every page ------------ */
body::before {
  content: '';
  position: fixed; inset: 0 0 auto 0; height: 620px;
  background:
    radial-gradient(ellipse 1100px 520px at 50% -150px, rgba(201,162,77,.20), transparent 68%),
    radial-gradient(ellipse 600px 300px at 15% -60px, rgba(201,162,77,.09), transparent 70%);
  pointer-events: none; z-index: 0;
}

/* ============================================================ typography */
.display {
  font-size: clamp(2.6rem, 6.2vw, 4.6rem);
  letter-spacing: -.045em;
  font-weight: 600;
  line-height: 1.02;
}
.h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -.035em; }
.h3 { font-size: 1.0625rem; letter-spacing: -.02em; font-weight: 600; }

.label {
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}
.lede  { font-size: 1.0625rem; color: var(--text-dim); max-width: 62ch; line-height: 1.65; }
.muted { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.gold  { color: var(--gold); }
.mono  { font-family: ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, monospace; font-size: .8125rem; }

/* section heading with a gold tick ------------------------------------- */
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.eyebrow::before {
  content: ''; width: 18px; height: 1px; background: var(--gold); flex: none;
}

/* ================================================================ layout */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; position: relative; z-index: 1; }
.section { padding: 84px 0; }
.section + .section { border-top: 1px solid var(--line); }
.stack   { display: flex; flex-direction: column; }
.row     { display: flex; align-items: center; }
.between { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

/* =================================================================== nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  background: rgba(8, 9, 11, .72);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { height: 100%; display: flex; align-items: center; gap: 40px; }

.brand { display: flex; align-items: baseline; gap: 8px; letter-spacing: -.03em; }
.brand b     { font-weight: 700; font-size: 1rem; }
.brand .mark { color: var(--gold); }
.brand span  {
  font-size: .625rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--text-faint); font-weight: 600;
}

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: .8125rem; font-weight: 500;
  color: var(--text-dim);
  border-radius: var(--radius);
  transition: color .18s var(--ease), background .18s var(--ease);
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.nav-links a[aria-current] { color: var(--gold); }
.nav-links a[aria-current]::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 1px;
  height: 1px; background: var(--gold);
}

/* ================================================================ button */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 20px;
  font-size: .8438rem; font-weight: 550;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--text);
  transition: all .2s var(--ease);
  white-space: nowrap;
}
.btn:hover { border-color: var(--line-gold); background: rgba(201,162,77,.06); }
.btn-primary {
  background: var(--gold); border-color: var(--gold); color: #0A0A0A; font-weight: 600;
}
.btn-primary:hover { background: var(--gold-bright); border-color: var(--gold-bright); }
.btn-ghost { border-color: transparent; color: var(--text-dim); padding-inline: 12px; }
.btn-ghost:hover { color: var(--gold); background: none; }
.btn .arrow { transition: transform .2s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ================================================================= cards */
.card {
  position: relative;
  display: block;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: border-color .22s var(--ease), background .22s var(--ease), transform .22s var(--ease);
}
.card:hover { border-color: var(--line-gold); background: var(--bg-elev); transform: translateY(-2px); }
.card .h3 { margin-bottom: 6px; }
.card p   { font-size: .875rem; color: var(--text-dim); }

/* index card — the big homepage section links */
.card-index { padding: 28px; display: flex; flex-direction: column; min-height: 190px; }
.card-index .idx {
  font-size: .6875rem; font-weight: 600; letter-spacing: .16em;
  color: var(--gold-dim); margin-bottom: auto;
}
.card-index:hover .idx { color: var(--gold); }
.card-index .h3 { font-size: 1.25rem; margin-top: 20px; }

.grid { display: grid; gap: 14px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(206px, 1fr)); }
.span-2 { grid-column: span 2; }

/* two-pane content page: scrolling list + sticky detail ----------------- */
.pane {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(340px, .95fr);
  gap: 40px;
  align-items: start;
}
.pane-side {
  position: sticky;
  top: calc(var(--nav-h) + 28px);
  max-height: calc(100vh - var(--nav-h) - 56px);
  overflow-y: auto;
}
@media (max-width: 1040px) {
  .pane { grid-template-columns: 1fr; }
  .pane-side { position: static; max-height: none; overflow: visible; }
  .span-2 { grid-column: span 1; }
}

/* ================================================================= chips */
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  padding: 5px 11px;
  font-size: .75rem; font-weight: 500;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 100px;
  transition: all .18s var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--line-strong); }
.chip[aria-pressed='true'] {
  color: var(--gold); border-color: var(--line-gold); background: rgba(201,162,77,.07);
}
.tag {
  display: inline-block;
  padding: 3px 8px;
  font-size: .6875rem; font-weight: 500; letter-spacing: .04em;
  color: var(--text-faint);
  border: 1px solid var(--line);
  border-radius: 100px;
}
.tag-gold { color: var(--gold); border-color: var(--line-gold); }

/* ============================================================ unit cards */
.unit-card { padding: 0; overflow: hidden; }
.unit-portrait {
  position: relative;
  height: 132px;
  display: grid; place-items: center;
  background:
    radial-gradient(ellipse 70% 60% at 50% 105%, rgba(201,162,77,.10), transparent 70%),
    var(--bg-elev);
  border-bottom: 1px solid var(--line);
}
.unit-card:hover .unit-portrait { background:
    radial-gradient(ellipse 70% 60% at 50% 105%, rgba(201,162,77,.18), transparent 70%),
    var(--bg-elev); }
/* Sprite portraits.
 *
 * The engine sizes and positions its avatar <img> from the frame's own local
 * bounds — it writes negative top/left offsets measured from the unit's origin
 * (the point where its feet meet the tile) and a matching transform-origin.
 * So the slot is a zero-size anchor marking where the unit STANDS, not a box
 * the image fills, and transform:scale() around it scales about the feet.
 */
.portrait-slot {
  position: absolute; left: 50%; top: 78%;
  width: 0; height: 0;
  transform: scale(.78);
  transition: transform .35s cubic-bezier(.2,.7,.3,1), filter .35s ease;
}
/* max-width:none matters: the global `img { max-width:100% }` resolves against
 * the containing block, which for an absolutely positioned child is this
 * zero-width slot — so the sprite renders 0px wide and vanishes. */
.portrait-slot img { position: absolute; max-width: none; }
.unit-card:hover .portrait-slot { transform: scale(.84); }

/* The selected card keeps the hover treatment permanently, so it stays
 * findable at a glance once the pointer has moved on. */
.unit-card[aria-pressed="true"] {
  border-color: var(--gold);
  background: var(--bg-elev);
  transform: translateY(-2px);
}
.unit-card[aria-pressed="true"] .portrait-slot { transform: scale(.84); }
.unit-card[aria-pressed="true"] .portrait-slot,
.unit-card[aria-pressed="true"] .portrait-anim canvas {
  filter: drop-shadow(0 0 14px rgba(201,162,77,.35));
}
.unit-card[aria-pressed="true"] .unit-portrait { background:
    radial-gradient(ellipse 70% 60% at 50% 105%, rgba(201,162,77,.18), transparent 70%),
    var(--bg-elev); }

/* The shared hover canvas is parked in whichever card is hovered.
 *
 * Its stage already renders at the slot's .78, so the CSS here only applies
 * the *extra* growth on hover — .84/.78 — about the same anchor point the
 * slot scales about. Scaling about the box centre instead would slide the
 * unit; stacking the slot's absolute .84 on top of the stage's .78 would
 * shrink it to .65. Both are ways to make the still and the animation stop
 * lining up, which reads as the unit teleporting the moment you hover it. */
.portrait-anim {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  pointer-events: none;
  transform-origin: 50% 78%;
}
.unit-card:hover .portrait-anim,
.unit-card[aria-pressed="true"] .portrait-anim { transform: scale(1.0769); }
.portrait-anim canvas { display: block; }
.portrait-slot.is-hidden { opacity: 0; }

/* ================================================================== modal */
.modal-veil {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: 24px;
  background: rgba(4, 5, 7, .72);
  backdrop-filter: blur(6px);
  animation: veil-in .18s var(--ease);
}
@keyframes veil-in { from { opacity: 0; } }
.modal-card {
  width: 100%; max-width: 520px;
  background: var(--bg-raised);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-lg);
  padding: 30px;
  animation: card-in .22s var(--ease);
}
@keyframes card-in { from { opacity: 0; transform: translateY(8px); } }
.modal-card p { font-size: .9375rem; color: var(--text-dim); line-height: 1.72; }
.modal-close {
  margin-left: auto; padding: 4px 8px;
  color: var(--text-faint); font-size: 1.125rem; line-height: 1;
}
.modal-close:hover { color: var(--gold); }

/* a tag that opens something */
.tag-pip { cursor: pointer; transition: color .18s var(--ease), border-color .18s var(--ease); }
.tag-pip:hover { color: var(--gold); border-color: var(--line-gold); }

.unit-body { padding: 14px 16px 16px; }
.unit-body .h3 { margin-bottom: 2px; }
.unit-ability { font-size: .75rem; color: var(--gold); margin-bottom: 12px; }

/* prose blurb in the unit detail panel */
.unit-desc-wrap { margin-bottom: 20px; }
.unit-desc {
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--text-dim);
}
/* -webkit-box is still the only cross-browser way to clamp by line count */
.unit-desc.is-clamped {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
          line-clamp: 2;
  overflow: hidden;
}
.unit-more {
  margin-top: 6px;
  padding: 0;
  font-size: .75rem;
  color: var(--gold-dim);
  transition: color .18s var(--ease);
}
.unit-more:hover { color: var(--gold); }

/* compact inline stat readout */
.statline { display: flex; gap: 14px; font-size: .75rem; }
.statline div { display: flex; gap: 5px; align-items: baseline; }
.statline .k { color: var(--text-faint); font-size: .6875rem; }
.statline .v { color: var(--text); font-variant-numeric: tabular-nums; font-weight: 500; }

/* full stat table (detail panels) */
.stats { display: grid; grid-template-columns: 1fr auto; gap: 0; }
.stats dt, .stats dd {
  margin: 0; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: .8125rem;
}
.stats dt { color: var(--text-dim); }
.stats dd { color: var(--text); text-align: right; font-variant-numeric: tabular-nums; font-weight: 500; }

/* bar meter for comparing stats */
.meter { height: 3px; background: rgba(255,255,255,.07); border-radius: 2px; overflow: hidden; }
.meter i { display: block; height: 100%; background: var(--gold); border-radius: 2px; }

/* ================================================== board / stage panels */
.board-frame {
  position: relative;
  aspect-ratio: 836 / 552;
  background:
    radial-gradient(ellipse 60% 50% at 50% 45%, rgba(201,162,77,.07), transparent 70%),
    var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: grid; place-items: center;
  overflow: hidden;
}
.board-frame::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 44px 28px;
  mask-image: radial-gradient(ellipse 65% 65% at 50% 50%, #000 30%, transparent 75%);
}
.board-note {
  position: relative; z-index: 1;
  font-size: .8125rem; color: var(--text-faint); text-align: center;
}

/* thumbnail version for setup galleries */
.board-thumb {
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(ellipse 55% 45% at 50% 50%, rgba(201,162,77,.06), transparent 70%),
    var(--bg-elev);
  border-bottom: 1px solid var(--line);
  position: relative; overflow: hidden;
}
.board-thumb::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 26px 17px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, #000 25%, transparent 78%);
}

/* ============================================================ step panel */
.step {
  display: flex; gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}
.step:last-child { border-bottom: 0; }
.step .n {
  flex: none; width: 24px; height: 24px;
  display: grid; place-items: center;
  border: 1px solid var(--line-strong); border-radius: 100px;
  font-size: .6875rem; font-weight: 600; color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.step[data-state='active'] .n { border-color: var(--gold); color: var(--gold); background: rgba(201,162,77,.08); }
.step[data-state='done']   .n { border-color: var(--ok); color: var(--ok); }
.step[data-state='active'] .step-title { color: var(--text); }
.step-title { display: block; font-size: .875rem; font-weight: 500; color: var(--text-dim); }
.step-body  { display: block; font-size: .8125rem; color: var(--text-faint); margin-top: 3px; }

/* ============================================================== progress */
.progress { height: 2px; background: rgba(255,255,255,.07); border-radius: 2px; overflow: hidden; }
.progress i { display: block; height: 100%; background: var(--gold); }

/* =============================================================== listing */
.list-row {
  display: grid; align-items: center; gap: 20px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raised);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.list-row:hover { border-color: var(--line-gold); background: var(--bg-elev); }
.list-row + .list-row { margin-top: 8px; }

/* ================================================================ footer */
.footer {
  margin-top: auto;          /* see the sticky-footer note on `body` */
  border-top: 1px solid var(--line);
  padding: 40px 0;
  font-size: .8125rem;
  color: var(--text-faint);
}
.footer a:hover { color: var(--gold); }

/* =============================================================== utility */
.hr { height: 1px; background: var(--line); border: 0; margin: 0; }
.sr {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* entrance ------------------------------------------------------------- */
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.rise { animation: rise .6s var(--ease) both; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* =========================================================== setup boards */
/*
 * A setup card draws the game's own isometric half-field: the five rows a set
 * can occupy, in the same projection Board.js uses, with real unit sprites
 * standing on the tiles. Geometry lives in setups.html next to the constants
 * it is lifted from; everything here is paint.
 */
.setup-grid { grid-template-columns: repeat(auto-fill, minmax(500px, 1fr)); gap: 18px; }
.setup-card { padding: 0; overflow: hidden; }
/* Boards are diagrams, not buttons — the .card hover lift makes them twitch as
   the pointer crosses the grid. */
.setup-card:hover { transform: none; border-color: var(--line-gold); }

.iso-board {
  position: relative;
  width: 100%;
  background:
    radial-gradient(ellipse 64% 58% at 50% 64%, rgba(201,162,77,.09), transparent 72%),
    var(--bg-elev);
  border-bottom: 1px solid var(--line);
  /* Sprites stand well above their tile and lean past the board's edges, the
     same way the set builder masks them. */
  overflow: hidden;
}
.iso-grid { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.iso-tile {
  fill: rgba(255,255,255,.020);
  stroke: rgba(255,255,255,.060);
  stroke-width: 1.25;
}
.iso-tile.filled { fill: rgba(201,162,77,.11); stroke: rgba(201,162,77,.32); }

/*
 * A standing unit is a zero-size anchor placed at its tile's centre — the same
 * contract .portrait-slot uses on the units page. The engine writes the <img>'s
 * own offsets relative to that point, so the anchor marks where the unit STANDS
 * rather than a box the sprite fills, and scale() works about its feet.
 * max-width:none keeps the global `img { max-width:100% }` from resolving
 * against a 0px box and collapsing the sprite.
 */
.iso-unit { position: absolute; width: 0; height: 0; }
.iso-slot {
  position: absolute; left: 0; top: 0;
  width: 0; height: 0; display: block;
  transform: scale(var(--sprite-scale, .8));
}
.iso-slot img { position: absolute; max-width: none; }

/* The two-letter unit code is the board until the avatar bundle lands, and
   stays the board if it never does. */
.iso-code {
  position: absolute; left: 0; top: 0;
  transform: translate(-50%, -50%);
  font-family: ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, monospace;
  font-size: .6875rem; font-weight: 600; letter-spacing: .04em;
  color: var(--gold); white-space: nowrap;
}
.iso-unit.has-portrait .iso-code { display: none; }

.setup-body { padding: 15px 17px 17px; display: flex; flex-direction: column; gap: 10px; }
.setup-rank { color: var(--gold); font-size: .8125rem; margin-right: 2px; }
.setup-meta { color: var(--text-faint); font-size: .75rem; margin-top: -6px; }

@media (max-width: 620px) {
  .setup-grid { grid-template-columns: 1fr; }
}

/* ============================================================ responsive */
@media (max-width: 1000px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .wrap { padding: 0 20px; }
  .section { padding: 56px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}