/* =====================================================
   42069 Protocol - design system
   Brutalist sci-fi terminal aesthetic.
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

:root {
  /* === Stitch palette === */
  --background:                #0d1515;
  --surface:                   #0d1515;
  --surface-dim:               #0d1515;
  --surface-bright:            #333b3a;
  --surface-container-lowest:  #08100f;
  --surface-container-low:     #151d1d;
  --surface-container:         #192121;
  --surface-container-high:    #232b2b;
  --surface-container-highest: #2e3636;

  --on-surface:         #dce4e3;
  --on-surface-variant: #b9cac9;
  --outline:            #849493;
  --outline-variant:    #3a4a49;

  --primary:           #c7fffe;
  --primary-container: #00f0f0;
  --primary-fixed-dim: #00dddd;
  --primary-fixed:     #2cfbfb;
  --on-primary:        #003737;

  --secondary:           #e4b5ff;
  --secondary-container: #a001f0;
  --secondary-fixed-dim: #e4b5ff;
  --on-secondary:        #4e0078;

  --tertiary:           #fff4dc;
  --tertiary-container: #ffd440;
  --tertiary-fixed-dim: #ecc22e;

  --error:           #ffb4ab;
  --error-container: #93000a;

  --success: #00ff7a;
  --warn:    #ffd440;

  /* Tetris piece colors (used for the board and accents) */
  --t-i: #00f0f0;
  --t-o: #ffd440;
  --t-t: #a001f0;
  --t-s: #00ff7a;
  --t-z: #ffb4ab;
  --t-j: #4a78ff;
  --t-l: #ff9933;

  /* Typography */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', ui-monospace, monospace;
  --font-pixel:   'JetBrains Mono', ui-monospace, monospace;

  /* Spacing tokens */
  --pixel-unit: 4px;
  --gutter:     16px;
  --margin-sm:  8px;
  --margin-md:  24px;
  --container-max: 1280px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--background); color: var(--on-surface); min-height: 100%; }

body {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background: var(--background);
  background-image:
    linear-gradient(to right, rgba(45, 74, 73, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(45, 74, 73, 0.35) 1px, transparent 1px);
  background-size: 32px 32px;
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

main { flex: 1 1 auto; width: 100%; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; }

::selection { background: var(--primary-fixed-dim); color: var(--background); }

::-webkit-scrollbar      { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--surface); border-left: 1px solid var(--outline-variant); }
::-webkit-scrollbar-thumb { background: var(--surface-container-highest); }
::-webkit-scrollbar-thumb:hover { background: var(--primary-fixed-dim); }

/* ===== Typography ===== */

.font-display { font-family: var(--font-display); }
.font-mono    { font-family: var(--font-mono); }
.font-pixel   { font-family: var(--font-pixel); }

.h-lg {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--on-surface);
}
.h-md {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}
.h-sm {
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--on-surface);
}

.body-lg { font-family: var(--font-mono); font-size: 16px; line-height: 1.5; color: var(--on-surface); }
.body-md { font-family: var(--font-mono); font-size: 14px; line-height: 1.5; color: var(--on-surface); }

.label-pixel {
  font-family: var(--font-pixel);
  font-size: 10px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

.dim       { color: var(--on-surface-variant); }
.muted     { color: var(--outline); }
.tint-cyan { color: var(--primary-fixed-dim); }
.tint-purple { color: var(--secondary); }
.tint-yellow { color: var(--tertiary-container); }
.tint-green  { color: var(--success); }
.tint-red    { color: var(--error); }

/* ===== Layout ===== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--margin-md);
}
@media (max-width: 720px) {
  .container { padding: 0 var(--gutter); }
}

.section { padding: var(--margin-md) 0; }

/* ===== Top nav ===== */

.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--outline-variant);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--margin-md);
  gap: 16px;
}
.brand {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.nav-links {
  display: flex; gap: 28px;
  font-family: var(--font-mono);
  font-size: 14px;
  align-items: center;
}
.nav-links a {
  color: var(--on-surface-variant);
  padding: 6px 0;
  position: relative;
  transition: color 0.15s, text-shadow 0.15s, transform 0.075s;
  letter-spacing: 0.02em;
}
.nav-links a:hover {
  color: var(--primary-container);
  text-shadow: 0 0 8px rgba(0, 221, 221, 0.45);
}
.nav-links a.active {
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
}
.nav-links a:active { transform: translateY(2px); }

@media (max-width: 880px) {
  .topbar-inner { padding: 0 var(--gutter); }
  .nav-links { display: none; }
}
.nav-mobile {
  display: none;
  border-top: 1px solid var(--outline-variant);
  background: var(--surface);
  padding: 8px var(--gutter);
}
@media (max-width: 880px) {
  .nav-mobile {
    display: flex; gap: 14px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    white-space: nowrap;
  }
  .nav-mobile a { color: var(--on-surface-variant); padding: 8px 0; }
  .nav-mobile a.active { color: var(--primary); border-bottom: 2px solid var(--primary); }
}

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center; justify-content: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  font-family: var(--font-pixel);
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 500;
  text-transform: uppercase;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--outline-variant);
  border-radius: 0;
  transition: all 0.18s;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover {
  background: var(--primary-fixed-dim);
  color: var(--background);
  transform: translateY(-2px);
  box-shadow: 0 0 8px rgba(0, 221, 221, 0.5);
}

.btn-primary {
  border-color: var(--primary-fixed-dim);
  color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-fixed-dim);
  color: var(--background);
}

.btn-ghost {
  border-color: var(--outline-variant);
  color: var(--on-surface);
}
.btn-ghost:hover {
  background: var(--surface-container-high);
  color: var(--primary);
  box-shadow: 0 0 8px rgba(0, 221, 221, 0.2);
}

.btn-danger {
  border-color: var(--error);
  color: var(--error);
}
.btn-danger:hover {
  background: var(--error);
  color: var(--background);
  box-shadow: 0 0 8px rgba(255, 180, 171, 0.45);
}

.btn-lg { height: 48px; font-size: 12px; padding: 0 22px; }
.btn-sm { height: 28px; font-size: 9px; padding: 0 10px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

/* ===== Sci-fi card ===== */

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  padding: 16px;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.card:hover {
  border-color: var(--primary-fixed-dim);
  box-shadow: 0 0 8px rgba(0, 221, 221, 0.35);
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 8px; height: 8px;
  background: var(--outline-variant);
  pointer-events: none;
}
.card:hover::before { background: var(--primary-fixed-dim); }

.card.no-hover:hover {
  border-color: var(--outline-variant);
  box-shadow: none;
}
.card.no-hover:hover::before { background: var(--outline-variant); }

.card.corner-tr::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 8px; height: 8px;
  background: var(--outline-variant);
  pointer-events: none;
}
.card:hover.corner-tr::after { background: var(--primary-fixed-dim); }

.card-pad-lg { padding: 24px; }
.card-pad-xl { padding: 32px; }

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--outline-variant);
}
.card-header h2,
.card-header h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: 0;
}

/* ===== Stat tile ===== */

.stat {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-top-width: 3px;
  padding: 20px 18px;
}
.stat.t-cyan   { border-top-color: var(--primary-fixed-dim); }
.stat.t-yellow { border-top-color: var(--tertiary-container); }
.stat.t-purple { border-top-color: var(--secondary); }
.stat.t-green  { border-top-color: var(--success); }
.stat.t-red    { border-top-color: var(--error); }

.stat .stat-k {
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  margin-bottom: 12px;
}
.stat .stat-v {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--on-surface);
  font-variant-numeric: tabular-nums;
}
.stat .stat-v.tint-cyan   { color: var(--primary); }
.stat .stat-v.tint-purple { color: var(--secondary); }
.stat .stat-v.tint-yellow { color: var(--tertiary-container); }
.stat .stat-v.tint-green  { color: var(--success); }
.stat .stat-v.tint-red    { color: var(--error); }
.stat .stat-unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--on-surface-variant);
  margin-left: 6px;
}
.stat .stat-sub {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--on-surface-variant);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gutter);
}
@media (max-width: 880px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Status pill ===== */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 8px;
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--surface-container);
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
}
.pill.live {
  background: rgba(0, 240, 240, 0.06);
  color: var(--primary-container);
  border-color: var(--primary-container);
}
.pill.live::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--primary-container);
  box-shadow: 0 0 6px var(--primary-container);
  animation: blink 1.6s ease-in-out infinite;
}
.pill.buy   { color: var(--secondary); border-color: var(--secondary); }
.pill.sell  { color: var(--error);     border-color: var(--error); }
.pill.warn  { color: var(--tertiary-container); border-color: var(--tertiary-container); }
.pill.good  { color: var(--success);   border-color: var(--success); }

@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.25; } }

/* ===== Mode toggle group ===== */

.toggle-group {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
  padding: 2px;
}
.toggle-group .tg {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 14px;
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.toggle-group .tg:hover { color: var(--primary); }
.toggle-group .tg.active {
  background: var(--primary-fixed-dim);
  color: var(--background);
}

/* ===== Tables ===== */

.table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 13px;
}
.table thead th {
  font-family: var(--font-pixel);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  background: var(--surface-container);
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--outline-variant);
}
.table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--outline-variant);
  color: var(--on-surface);
}
.table tbody tr:hover td {
  background: var(--surface-container-high);
}
.table tbody tr:last-child td { border-bottom: 0; }
.table td.num, .table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table td.rank { color: var(--primary); font-weight: 600; }
.table td.rank-purple { color: var(--secondary); }
.table tr.you td {
  background: var(--surface-container-high);
  border-left: 2px solid var(--primary);
}

/* ===== Input ===== */

.input, .select {
  width: 100%;
  height: 40px;
  padding: 0 14px;
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: 0;
  color: var(--on-surface);
  font-family: var(--font-mono);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input:focus, .select:focus {
  border-color: var(--primary-fixed-dim);
  box-shadow: 0 0 8px rgba(0, 221, 221, 0.4);
}
.input::placeholder { color: var(--outline); }

/* ===== Footer ===== */

.footer {
  background: var(--surface-container-lowest);
  border-top: 1px solid var(--outline-variant);
  margin-top: 64px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 24px var(--margin-md);
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--on-surface);
  letter-spacing: -0.01em;
}
.footer-brand .accent { color: var(--primary-fixed-dim); }
.footer-links {
  display: flex; gap: 18px; flex-wrap: wrap;
  font-family: var(--font-pixel);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.footer-links a {
  color: var(--on-surface-variant);
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--tertiary-fixed-dim); }

/* ===== Wallet pill ===== */

.wallet-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 12px;
  background: var(--surface-container);
  border: 1px solid var(--primary-fixed-dim);
  color: var(--primary);
  font-family: var(--font-pixel);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.wallet-pill::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

/* ===== Tooltip ===== */

.tt {
  position: fixed;
  z-index: 200;
  pointer-events: none;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--primary-fixed-dim);
  box-shadow: 0 0 12px rgba(0, 221, 221, 0.2);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--on-surface);
  opacity: 0;
  transition: opacity 0.12s;
  max-width: 280px;
}
.tt.show { opacity: 1; }
.tt .tt-addr {
  font-family: var(--font-pixel);
  font-size: 11px;
  color: var(--primary);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.tt .tt-row { display: flex; justify-content: space-between; gap: 14px; padding: 2px 0; }
.tt .tt-row .k { color: var(--on-surface-variant); font-size: 11px; }
.tt .tt-row .v { color: var(--on-surface); font-variant-numeric: tabular-nums; font-size: 12px; }

/* ===== Toast ===== */

.toast {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 1000;
  padding: 12px 18px;
  background: var(--surface);
  border: 1px solid var(--primary-fixed-dim);
  color: var(--on-surface);
  font-family: var(--font-mono);
  font-size: 13px;
  box-shadow: 0 0 12px rgba(0, 221, 221, 0.2);
  animation: toastIn 0.25s ease-out;
  max-width: 360px;
}
@keyframes toastIn { from { transform: translateY(20px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ===== Key-value rows ===== */

.kvs { display: flex; flex-direction: column; }
.kv {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--outline-variant);
  font-family: var(--font-mono);
  font-size: 13px;
}
.kv:last-child { border-bottom: 0; }
.kv .k { color: var(--on-surface-variant); }
.kv .v { color: var(--on-surface); font-variant-numeric: tabular-nums; }

/* ===== Material icons sizing ===== */

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  font-size: 16px;
}
.mi-sm { font-size: 12px; }
.mi-lg { font-size: 22px; }

/* ===== Pixel hero visual ===== */

.pixel-cluster {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  transform: rotate(8deg);
}
.pixel-cluster .pc {
  aspect-ratio: 1;
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
}
.pixel-cluster .pc.fill-cyan {
  background: var(--primary-container);
  border-color: var(--primary-container);
  box-shadow: 0 0 12px rgba(0, 240, 240, 0.6);
}
.pixel-cluster .pc.fill-yellow {
  background: var(--tertiary-container);
  border-color: var(--tertiary-container);
  box-shadow: 0 0 12px rgba(255, 212, 64, 0.55);
}
.pixel-cluster .pc.fill-purple {
  background: var(--secondary-container);
  border-color: var(--secondary-container);
  box-shadow: 0 0 12px rgba(160, 1, 240, 0.55);
}
.pixel-cluster .pc.fill-red {
  background: var(--error);
  border-color: var(--error);
  box-shadow: 0 0 12px rgba(255, 180, 171, 0.55);
}
.pixel-cluster .pc.outline-cyan   { border-color: var(--primary-container); }
.pixel-cluster .pc.outline-yellow { border-color: var(--tertiary-container); }
.pixel-cluster .pc.outline-purple { border-color: var(--secondary-container); }

/* ===== Tetris board (live) ===== */

.tboard {
  position: relative;
  width: 100%;
  aspect-ratio: 10 / 20;
  border: 1px solid var(--primary-fixed-dim);
  background: var(--surface-container-lowest);
  box-shadow: inset 0 0 20px rgba(0, 221, 221, 0.18);
  overflow: hidden;
}
.tboard-svg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}
.tboard-svg .grid-line {
  stroke: rgba(45, 74, 73, 0.5);
  stroke-width: 0.3;
  shape-rendering: crispEdges;
}
.board-cell {
  cursor: pointer;
  shape-rendering: crispEdges;
  transition: filter 0.12s;
}
.board-cell:hover {
  filter: brightness(1.4) drop-shadow(0 0 6px currentColor);
}
.board-cell.is-you {
  stroke: #ffffff;
  stroke-width: 0.35;
}

.board-empty {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-pixel); font-size: 10px;
  color: var(--outline);
  text-align: center;
  padding: 24px;
  pointer-events: none;
}

/* ===== Grid utilities ===== */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--gutter); }
@media (max-width: 880px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.stack { display: flex; flex-direction: column; }
.stack > * + * { margin-top: var(--gutter); }
.stack-sm > * + * { margin-top: var(--margin-sm); }
.stack-md > * + * { margin-top: var(--margin-md); }

.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }

.text-mono       { font-family: var(--font-mono); }
.text-pixel      { font-family: var(--font-pixel); text-transform: uppercase; letter-spacing: 0.12em; }
.text-right      { text-align: right; }
.text-center     { text-align: center; }
.uppercase       { text-transform: uppercase; }
.break-word      { word-break: break-all; }

.spacer-sm { height: var(--margin-sm); }
.spacer-md { height: var(--margin-md); }
.spacer-lg { height: 48px; }

/* ===== Section heading (terminal-style title with underscore) ===== */

.term-title {
  display: flex; align-items: baseline; gap: 8px;
  margin-bottom: 8px;
}
.term-title h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--on-surface);
  text-transform: uppercase;
}
.term-title h1 .accent { color: var(--primary); }
.term-title h1 .cursor {
  display: inline-block;
  width: 0.5em; height: 0.85em;
  background: var(--primary);
  margin-left: 2px;
  vertical-align: -2px;
  animation: caret 1.1s steps(2) infinite;
}
@keyframes caret { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0; } }

.term-sub {
  color: var(--on-surface-variant);
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 24px;
}

/* ===== Whitepaper ===== */

.wp-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 64px;
  max-width: 1100px;
  margin: 32px auto 96px;
  padding: 0 var(--margin-md);
}
.wp-toc { position: sticky; top: 88px; font-family: var(--font-mono); font-size: 12px; line-height: 1.9; }
.wp-toc h4 {
  font-family: var(--font-pixel); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 16px;
}
.wp-toc a {
  display: block; color: var(--on-surface-variant);
  padding: 4px 0;
  border-left: 2px solid transparent; padding-left: 12px; margin-left: -14px;
  transition: color 0.15s, border-color 0.15s;
}
.wp-toc a:hover, .wp-toc a.active {
  color: var(--primary);
  border-left-color: var(--primary-fixed-dim);
}
.wp-body {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-surface-variant);
}
.wp-body h2 {
  display: flex; gap: 12px; align-items: baseline;
  font-family: var(--font-display);
  font-size: 24px; font-weight: 700;
  color: var(--on-surface);
  margin: 48px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--outline-variant);
}
.wp-body h2 .num {
  font-family: var(--font-pixel);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--primary);
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  padding: 6px 10px;
}
.wp-body h3 {
  font-family: var(--font-pixel);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
  margin: 28px 0 10px;
}
.wp-body p { margin: 14px 0; max-width: 70ch; color: var(--on-surface-variant); }
.wp-body ul, .wp-body ol { padding-left: 20px; margin: 14px 0; }
.wp-body li { margin-bottom: 6px; color: var(--on-surface-variant); }
.wp-body code {
  font-family: var(--font-mono);
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  color: var(--primary);
  padding: 1px 6px;
  font-size: 0.9em;
}
.wp-body table {
  width: 100%; border-collapse: collapse; margin: 18px 0;
  font-family: var(--font-mono); font-size: 13px;
  background: var(--surface);
}
.wp-body th {
  font-family: var(--font-pixel); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  text-align: left; padding: 12px 14px;
  color: var(--on-surface-variant);
  background: var(--surface-container);
  border-bottom: 1px solid var(--outline-variant);
  font-weight: 500;
}
.wp-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--outline-variant);
  color: var(--on-surface);
}
.wp-cover {
  margin-bottom: 36px; padding-bottom: 32px;
  border-bottom: 1px solid var(--outline-variant);
}
.wp-cover .label {
  display: inline-block;
  font-family: var(--font-pixel); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--tertiary-fixed-dim);
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  padding: 5px 10px;
  margin-bottom: 14px;
}
.wp-cover h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--on-surface);
  text-transform: uppercase;
}
.wp-cover h1 .accent { color: var(--primary); }
.wp-cover .deck {
  font-family: var(--font-mono); font-size: 15px;
  color: var(--on-surface-variant); margin-top: 14px; max-width: 65ch;
}
.wp-cover .meta {
  display: flex; flex-wrap: wrap; gap: 18px;
  margin-top: 22px;
  font-family: var(--font-pixel); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--on-surface-variant);
}
.wp-cover .meta span:before { content: '// '; color: var(--primary); }
.wp-formula {
  margin: 18px 0; padding: 16px 18px;
  background: var(--surface-container-lowest);
  border: 1px solid var(--outline-variant);
  border-left: 3px solid var(--primary-fixed-dim);
  font-family: var(--font-mono); font-size: 13px;
  color: var(--on-surface);
  white-space: pre-wrap;
}

@media (max-width: 880px) {
  .wp-grid { grid-template-columns: 1fr; gap: 28px; padding: 0 var(--gutter); }
  .wp-toc { position: static; }
}

/* ===== Hero (home page) ===== */

.hero { padding: 48px 0 24px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
}
.hero-side {
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-lowest);
  min-height: 460px;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.hero-side::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(45, 74, 73, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(45, 74, 73, 0.5) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.6;
  pointer-events: none;
}

/* ===== Misc ===== */

.divider {
  height: 1px;
  background: var(--outline-variant);
  margin: 32px 0;
}
.divider-dashed {
  border-top: 1px dashed var(--outline-variant);
  margin: 32px 0;
}

.crumb-tabs {
  display: inline-flex; gap: 2px;
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
  padding: 2px;
}
.crumb-tabs a {
  font-family: var(--font-pixel); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 8px 14px;
  color: var(--on-surface-variant);
}
.crumb-tabs a.active {
  background: var(--surface-container);
  color: var(--primary);
}

.box-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 14px;
  background: var(--surface-container-highest);
  border: 1px solid var(--outline-variant);
}
.box-row .k {
  font-family: var(--font-pixel); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--on-surface-variant);
}
.box-row .v {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.box-row .v .unit { font-family: var(--font-mono); font-size: 12px; color: var(--on-surface-variant); margin-left: 6px; font-weight: 400; }

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