/* ============================================================
   TOKENS — синхронизированы с DOCS/DESIGN.md
   ============================================================ */
:root {
  /* Cold Blue — accent (afd1fb для soft, синий для CTA) */
  --blue-50:  #EEF3FF;
  --blue-100: #C8DFFC;
  --blue-200: #afd1fb;
  --blue-300: #8AA8FB;
  --blue-400: #5E86F4;
  --blue-500: #3B62E8;
  --blue-600: #2545C2;
  --blue-700: #1A3296;
  --blue-800: #13256B;
  --blue-900: #0B1742;

  /* Warm Gray — cream-aligned (внутри светлых плиток) */
  --gray-50:  #f0ede6;
  --gray-100: #e1ddd2;
  --gray-200: #c8c2b4;
  --gray-300: #a8a298;
  --gray-400: #7d776c;
  --gray-500: #56524b;
  --gray-600: #3f3c36;
  --gray-700: #2a2825;
  --gray-800: #181715;
  --gray-900: #0a0a0a;

  /* Noir — page bg + dark tiles */
  --noir-900: #0a0a0a;
  --noir-800: #1a1a1a;
  --noir-700: #2a2a2a;
  --noir-600: #404040;
  --noir-500: #6a6a6a;
  --noir-400: #898989;
  --noir-300: #aaaaaa;
  --noir-200: #cacaca;

  --cream-50: #f0ede6;
  --white: #FFFFFF;
  --black: #000000;

  /* Semantic */
  --bg-canvas:   var(--noir-900);
  --bg-surface:  var(--gray-50);
  --bg-invert:   var(--noir-800);

  --ink-strong:  var(--gray-900);
  --ink-regular: var(--gray-700);
  --ink-muted:   var(--gray-500);
  --ink-invert:  var(--cream-50);

  --accent:      var(--blue-500);
  --accent-soft: var(--blue-200);
  --accent-hover:var(--blue-600);

  --board-light: var(--gray-100);
  --board-dark:  var(--noir-700);

  --status-up:   #1A8F5A;
  --status-down: #C0392B;
  --status-flat: var(--noir-500);

  /* Canvas-context (theme-aware) — defaults = dark theme */
  --ink-on-canvas:          var(--ink-invert);
  --ink-on-canvas-subtle:   var(--noir-300);
  --ink-on-canvas-muted:    var(--noir-400);
  --border-on-canvas:       var(--noir-700);
  --border-on-canvas-hover: var(--noir-600);
  --surface-on-canvas:      var(--noir-800);
  --grid-color:             var(--blue-500);
  --grid-opacity:           0.16;
  --grid-cell:              160px;

  --font-sans: 'Inter', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;

  --radius:    0;
  --radius-sm: 0;
  --pad-king:  32px;
  --pad-md:    24px;
  --pad-sm:    20px;
  --pad-xs:    14px;
  --gap:       12px;

  --d-fast: 120ms;
  --d-base: 200ms;
  --d-slow: 360ms;
  --ease:   cubic-bezier(0.2, 0, 0, 1);
}

/* LIGHT THEME — переопределение canvas-context */
body.theme-light {
  --bg-canvas:              var(--white);
  --bg-invert:              var(--noir-900);
  --ink-on-canvas:          var(--ink-strong);
  --ink-on-canvas-subtle:   var(--gray-700);
  --ink-on-canvas-muted:    var(--gray-500);
  --border-on-canvas:       var(--gray-200);
  --border-on-canvas-hover: var(--gray-300);
  --surface-on-canvas:      var(--gray-50);
  --grid-color:             var(--gray-300);
  --grid-opacity:           0.45;
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-on-canvas);
  background: var(--bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'ss01', 'cv11';
  overflow-x: hidden;
  transition: background var(--d-base) var(--ease), color var(--d-base) var(--ease);
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* BACKGROUND GRID */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right,  var(--grid-color) 0 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-color) 0 1px, transparent 1px);
  background-size: var(--grid-cell) var(--grid-cell);
  background-position: 0 0;
  opacity: var(--grid-opacity);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 48px 96px;
}

/* TOPBAR */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-on-canvas);
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.logo-mark {
  font-size: 24px;
  line-height: 1;
  color: var(--ink-on-canvas);
}
.logo-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-on-canvas-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-left: 4px;
}
.nav {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}
.nav a {
  font-size: 15px;
  color: var(--ink-on-canvas-subtle);
  transition: color var(--d-base) var(--ease);
  position: relative;
}
.nav a:hover { color: var(--ink-on-canvas); }
.nav a.active { color: var(--ink-on-canvas); font-weight: 500; }
.nav a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: -22px;
  height: 2px;
  background: var(--accent);
}
.topbar-actions { display: flex; gap: 12px; align-items: center; }
.search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border-on-canvas);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-on-canvas-subtle);
  background: var(--surface-on-canvas);
  transition: border-color var(--d-base) var(--ease);
  cursor: pointer;
}
.search:hover { border-color: var(--border-on-canvas-hover); }
.kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 6px;
  border: 1px solid var(--border-on-canvas);
  border-radius: 0;
  color: var(--ink-on-canvas-muted);
  background: var(--bg-canvas);
}
.btn {
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--d-base) var(--ease);
}
.btn-ghost { color: var(--ink-on-canvas); }
.btn-ghost:hover { background: var(--surface-on-canvas); }
.theme-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid var(--border-on-canvas);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-on-canvas);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
  transition: all var(--d-base) var(--ease);
}
.theme-toggle:hover { background: var(--surface-on-canvas); }
.theme-toggle:active { transform: scale(0.95); }
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary {
  background: transparent;
  color: var(--ink-on-canvas);
  border: 1px solid var(--border-on-canvas);
}
.btn-secondary:hover { background: var(--surface-on-canvas); }

/* Внутри cream/blue/noir-плиток — кнопки используют tile-context цвета,
   иначе сливаются с подложкой (border-on-canvas — для страницы, не для плитки).
   Также применяется к .article-card (cream-tile в листингах). */
.block--canvas .btn-secondary,
.block--surface .btn-secondary,
.block--accent-soft .btn-secondary,
.article-card .btn-secondary {
  color: var(--ink-strong);
  border-color: var(--gray-300);
}
.block--canvas .btn-secondary:hover,
.block--surface .btn-secondary:hover,
.block--accent-soft .btn-secondary:hover,
.article-card .btn-secondary:hover {
  background: var(--gray-100);
}
.block--invert .btn-secondary {
  color: var(--ink-invert);
  border-color: var(--noir-600);
}
.block--invert .btn-secondary:hover {
  background: var(--noir-700);
}
.block--accent .btn-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.4);
}
.block--accent .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* То же для action-btn (кнопки-чипы) */
.block--canvas .action-btn,
.block--surface .action-btn,
.block--accent-soft .action-btn {
  color: var(--ink-strong);
  border-color: var(--gray-300);
}
.block--canvas .action-btn:hover:not(.active),
.block--surface .action-btn:hover:not(.active),
.block--accent-soft .action-btn:hover:not(.active) {
  background: var(--gray-100);
}
.block--invert .action-btn {
  color: var(--ink-invert);
  border-color: var(--noir-600);
}
.block--invert .action-btn:hover:not(.active) {
  background: var(--noir-700);
}

/* ============================================================
   HERO HEADER
   ============================================================ */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: end;
  padding: 24px 0 32px;
}
.hero-title {
  font-size: 96px;
  line-height: 0.96;
  letter-spacing: -0.035em;
  font-weight: 700;
  max-width: 11ch;
}
.hero-meta {
  text-align: right;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-end;
}
.label-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-on-canvas-muted);
  font-weight: 500;
}
.hero-lead {
  font-size: 17px;
  color: var(--ink-on-canvas-subtle);
  max-width: 32ch;
  line-height: 1.45;
}

/* ============================================================
   BENTO BOARD
   ============================================================ */
.board {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(88px, auto);
  gap: var(--gap);
  margin-top: 24px;
}

.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-12 { grid-column: span 12; }

.row-1  { grid-row: span 1; }
.row-2  { grid-row: span 2; }
.row-3  { grid-row: span 3; }
.row-4  { grid-row: span 4; }
.row-5  { grid-row: span 5; }
.row-6  { grid-row: span 6; }

/* BLOCK — базовый бенто-блок */
.block {
  position: relative;
  border-radius: var(--radius);
  padding: var(--pad-md);
  background: var(--bg-surface);
  color: var(--ink-strong);
  display: flex;
  flex-direction: column;
  transition: transform var(--d-base) var(--ease), box-shadow var(--d-base) var(--ease);
  overflow: hidden;
}
.block:hover { transform: translateY(-3px); }
.block--canvas  { background: var(--bg-surface); }
.block--surface { background: var(--bg-surface); }
.block--invert  { background: var(--bg-invert); color: var(--ink-invert); }
.block--accent  { background: var(--accent); color: var(--white); }
.block--accent-soft { background: var(--accent-soft); color: var(--ink-strong); }
.block--king    { padding: var(--pad-king); }
.block--pawn    { padding: var(--pad-sm); border-radius: var(--radius-sm); }

.block-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.meta {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  font-weight: 500;
}
.block--invert .meta { color: var(--noir-400); }
.notation {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
  font-weight: 400;
  white-space: nowrap;
}
.block--invert .notation { color: var(--noir-400); }

/* KING — Лидер недели */
.king-handle {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-muted);
  margin-bottom: 24px;
}
.king-id {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: auto;
  padding-bottom: 24px;
}
.avatar {
  width: 56px; height: 56px;
  background: var(--noir-400);
  color: var(--white);
  border-radius: 0;
  display: grid; place-items: center;
  font-weight: 700; font-size: 18px;
  letter-spacing: 0.04em;
}
.avatar--invert { background: var(--gray-700); color: var(--gray-100); }

/* Rank-based chess piece avatars */
.avatar[data-rank],
.avatar-sm[data-rank] {
  font-size: 0;
  line-height: 0;
  font-family: 'Segoe UI Symbol', 'Apple Symbols', 'Noto Sans Symbols', system-ui, sans-serif;
}
.avatar[data-rank]::before,
.avatar-sm[data-rank]::before {
  line-height: 1;
}
.avatar[data-rank]::before    { font-size: 22px; transform: translateY(4px); }
.avatar-sm[data-rank]::before { font-size: 14px; transform: translateY(3px); }

.avatar[data-rank="novice"]::before,
.avatar-sm[data-rank="novice"]::before       { content: '\2659'; }
.avatar[data-rank="expert"]::before,
.avatar-sm[data-rank="expert"]::before       { content: '\2658'; }
.avatar[data-rank="candidate"]::before,
.avatar-sm[data-rank="candidate"]::before    { content: '\2657'; }
.avatar[data-rank="master"]::before,
.avatar-sm[data-rank="master"]::before       { content: '\2656'; }
.avatar[data-rank="grandmaster"]::before,
.avatar-sm[data-rank="grandmaster"]::before  { content: '\2655'; }

.king-name {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
}
.elo {
  margin-top: auto;
}
.elo-value {
  font-size: 160px;
  line-height: 0.92;
  font-weight: 900;
  letter-spacing: -0.045em;
  color: var(--ink-strong);
  font-feature-settings: 'tnum' 1;
}
.elo-meta {
  margin-top: 12px;
  font-size: 15px;
  color: var(--ink-regular);
  display: flex;
  gap: 8px;
  align-items: center;
}
.delta-up {
  color: var(--status-up);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.delta-down {
  color: var(--status-down);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.delta-flat { color: var(--status-flat); }
.separator { color: var(--ink-muted); }

/* QUEEN — Featured interview / new entrant */
.queen-title {
  font-size: 28px;
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 700;
  margin-bottom: auto;
}
.queen-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 12px;
  margin-top: 24px;
}
.queen-byline {
  font-size: 14px;
  color: var(--ink-muted);
}
.block--invert .queen-byline { color: var(--noir-400); }
.arrow {
  font-size: 24px;
  line-height: 1;
  color: var(--ink-strong);
  transition: transform var(--d-base) var(--ease);
  display: inline-block;
}
.block--invert .arrow { color: var(--ink-invert); }
.block:hover .arrow { transform: translate(3px, -3px); }

.new-name {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin-bottom: 8px;
}
.new-handle {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray-700);
  margin-bottom: auto;
}

/* PAWNs — stat blocks */
.stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  font-weight: 500;
}
.block--invert .stat-label { color: var(--noir-400); }
.stat-value {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-top: 8px;
  font-variant-numeric: tabular-nums;
}
.stat-caption {
  font-size: 13px;
  color: var(--ink-muted);
  margin-top: 4px;
}
.block--invert .stat-caption { color: var(--noir-400); }

/* ROOK — таблица топ-10 */
.rook-title {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.rook-sub {
  font-size: 14px;
  color: var(--ink-muted);
  margin-bottom: 20px;
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table-scroll {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--gray-300) transparent;
}
.table-scroll::-webkit-scrollbar { width: 6px; }
.table-scroll::-webkit-scrollbar-thumb { background: var(--gray-300); }
.table-scroll::-webkit-scrollbar-track { background: transparent; }

.block:has(.table-scroll) {
  padding-left: 0;
  padding-right: 0;
}
.block:has(.table-scroll) > *:not(.table-scroll) {
  padding-left: var(--pad-md);
  padding-right: var(--pad-md);
}
.table-scroll .table th:first-child,
.table-scroll .table td:first-child {
  padding-left: var(--pad-md);
}
.table-scroll .table th:last-child,
.table-scroll .table td:last-child {
  padding-right: var(--pad-md);
}

.table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  background: var(--bg-surface);
  z-index: 1;
}
.table th:last-child { text-align: right; padding-right: 0; }
.table td {
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
.table td:last-child { text-align: right; padding-right: 0; }
.table tr:last-child td { border-bottom: 0; }
.table tr {
  transition: background var(--d-fast) var(--ease);
}
.table tbody tr:hover { background: var(--gray-100); }
.rank {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--ink-muted);
  width: 32px;
}
.rank--top { color: var(--accent); }
.person {
  display: flex;
  align-items: center;
  gap: 12px;
}
.avatar-sm {
  width: 32px; height: 32px;
  background: var(--gray-300);
  color: var(--white);
  border-radius: 0;
  display: grid; place-items: center;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.person-name { font-weight: 500; }
.person-handle {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
}
.elo-num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  font-size: 15px;
}
.delta-cell {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.title-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 0;
  background: var(--gray-100);
  color: var(--ink-regular);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* BISHOP — гайды/курсы */
.bishop-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 500;
}
.bishop-title {
  font-size: 21px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin-top: 8px;
  margin-bottom: auto;
}
.block--invert .bishop-tag { color: var(--blue-300); }
.bishop-foot {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--ink-muted);
}
.block--invert .bishop-foot { color: var(--noir-400); }

/* KNIGHT — холивар */
.knight-question {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin-bottom: 24px;
}
.vs-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
  margin-top: auto;
}
.vs-side {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--gray-100);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 100px;
}
.vs-side--a { background: var(--accent-soft); }
.vs-side--b {
  background: var(--noir-900);
  color: var(--ink-invert);
}
.vs-side--b .vs-pos     { color: var(--noir-300); }
.vs-side--b .vs-bar     { background: var(--noir-700); }
.vs-side--b .vs-percent { color: var(--ink-invert); }
.vs-pos {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  font-weight: 500;
}
.vs-claim {
  font-size: 14px;
  line-height: 1.4;
  font-weight: 500;
}
.vs-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--gray-100);
  overflow: hidden;
  margin-top: auto;
}
.vs-bar-fill {
  height: 100%;
  background: var(--accent);
}
.vs-percent {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  margin-top: 8px;
}
.vs-divider {
  width: 1px;
  background: var(--gray-300);
  align-self: stretch;
  position: relative;
}
.vs-divider::before {
  content: 'vs';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-surface);
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* NEWS ROOK — горизонтальный поток */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}
.news-item {
  border-left: 1px solid var(--gray-200);
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.news-item:first-child { border-left: 0; padding-left: 0; }
.news-time {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 500;
}
.news-title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.005em;
}
.news-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  margin-top: auto;
}

/* COURSE — featured */
.course-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--blue-300);
  font-weight: 500;
}
.course-title {
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin-top: 12px;
}
.course-author {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--noir-400);
  margin-top: 12px;
}
.course-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 24px;
}
.course-stats {
  display: flex;
  gap: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--noir-300);
}
.course-stat strong {
  display: block;
  font-size: 18px;
  color: var(--ink-invert);
  font-family: var(--font-sans);
  font-weight: 700;
}

/* CHECKLIST */
.check-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
}
.check-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--ink-regular);
}
.check-box {
  width: 16px; height: 16px;
  border: 1.5px solid var(--gray-300);
  border-radius: 0;
  flex-shrink: 0;
  display: grid; place-items: center;
  font-size: 10px;
  color: var(--white);
  background: transparent;
  cursor: pointer;
}
.check-box.done {
  background: var(--ink-strong);
  border-color: var(--ink-strong);
}
.check-box.done::before { content: '✓'; }
.check-progress {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

/* SECTION HEADERS */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin: 64px 0 20px;
  gap: 24px;
}
.section-head h2 {
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 700;
}
.section-head .label-meta { margin-bottom: 8px; }
.section-head a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-on-canvas-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.section-head a:hover { color: var(--ink-on-canvas); }

/* FOOTER */
.footer {
  margin-top: 96px;
  padding-top: 32px;
  border-top: 1px solid var(--border-on-canvas);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-on-canvas-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer-coords { display: flex; gap: 24px; }

/* ============================================================
   PAGE-SPECIFIC: ARTICLE
   ============================================================ */
.article-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 24px 96px;
}
.article-meta-row {
  display: flex;
  gap: 16px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-on-canvas-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
}
.article-title {
  font-size: 56px;
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--ink-on-canvas);
}
.article-excerpt {
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink-on-canvas-subtle);
  margin-bottom: 40px;
}
.article-author-row {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 24px 0;
  border-top: 1px solid var(--border-on-canvas);
  border-bottom: 1px solid var(--border-on-canvas);
  margin-bottom: 48px;
}
.article-author-row .avatar { width: 48px; height: 48px; }
.article-author-info { flex: 1; }
.article-author-info .person-name { font-weight: 700; font-size: 16px; color: var(--ink-on-canvas); }
.article-body {
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink-on-canvas);
}
.article-body h2 {
  font-size: 32px;
  margin-top: 56px;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.article-body h3 {
  font-size: 22px;
  margin-top: 40px;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.article-body p { margin-bottom: 24px; }
.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 28px;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; }
.article-body blockquote {
  margin: 32px 0;
  padding: 16px 24px;
  border-left: 3px solid var(--accent);
  background: var(--surface-on-canvas);
  font-style: italic;
}
.article-body code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--surface-on-canvas);
  padding: 2px 6px;
}
.article-body pre {
  background: var(--noir-800);
  color: var(--cream-50);
  padding: 20px 24px;
  margin: 24px 0;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.5;
}
.article-body pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}
.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body a:hover { color: var(--accent-hover); }
.article-body img {
  margin: 32px 0;
  border: 1px solid var(--border-on-canvas);
}

.article-actions {
  display: flex;
  gap: 12px;
  margin: 48px 0;
  padding: 24px 0;
  border-top: 1px solid var(--border-on-canvas);
  border-bottom: 1px solid var(--border-on-canvas);
}
.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--border-on-canvas);
  border-radius: 999px;
  font-size: 14px;
  color: var(--ink-on-canvas);
  cursor: pointer;
  transition: all var(--d-base) var(--ease);
}
.action-btn:hover { background: var(--surface-on-canvas); }
.action-btn.active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

/* ============================================================
   FORMS / AUTH
   ============================================================ */
.auth-page {
  max-width: 420px;
  margin: 80px auto 0;
  padding: 24px;
}
.auth-page h1 {
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.auth-page .hero-lead { margin-bottom: 32px; }
.field {
  display: block;
  margin-bottom: 16px;
}
.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-on-canvas-muted);
  margin-bottom: 8px;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-on-canvas);
  background: var(--surface-on-canvas);
  color: var(--ink-on-canvas);
  font-family: var(--font-sans);
  font-size: 15px;
  border-radius: 0;
  transition: border-color var(--d-base) var(--ease);
}
.field textarea {
  font-family: var(--font-mono);
  font-size: 14px;
  min-height: 200px;
  resize: vertical;
  line-height: 1.5;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
}
.field-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-on-canvas-muted);
  margin-top: 6px;
}
.field-error {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--status-down);
  margin-top: 6px;
}
.form-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
}
.form-actions .btn { padding: 12px 24px; }

/* ============================================================
   COMMENTS
   ============================================================ */
.comments-section {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border-on-canvas);
}
.comments-section h3 {
  font-size: 24px;
  letter-spacing: -0.015em;
  margin-bottom: 24px;
}
.comment {
  display: flex;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-on-canvas);
}
.comment:last-child { border-bottom: 0; }
.comment-body {
  flex: 1;
}
.comment-head {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  margin-bottom: 6px;
}
.comment-head .person-name { font-size: 14px; }
.comment-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-on-canvas-muted);
}
.comment-text {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-on-canvas);
}

/* ============================================================
   TOAST / FLASH
   ============================================================ */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 18px;
  background: var(--noir-800);
  color: var(--cream-50);
  font-size: 14px;
  z-index: 100;
  border-left: 3px solid var(--accent);
  animation: toast-in var(--d-base) var(--ease);
}
.toast--error { border-left-color: var(--status-down); }
.toast--success { border-left-color: var(--status-up); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   ARTICLE LIST (used on profile, topic, search results)
   ============================================================ */
.article-list {
  display: grid;
  gap: 16px;
}
.article-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  padding: 24px;
  background: var(--bg-surface);
  cursor: pointer;
  transition: transform var(--d-base) var(--ease);
}
.article-card:hover { transform: translateY(-2px); }
.article-card-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  margin-bottom: 8px;
  display: flex;
  gap: 12px;
}
.article-card h3 {
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
  color: var(--ink-strong);
}
.article-card-excerpt {
  font-size: 15px;
  color: var(--ink-regular);
  margin-bottom: 12px;
}
.article-card-foot {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-muted);
  align-items: center;
}

/* ============================================================
   BADGES / SEO LEVEL
   ============================================================ */
.seo-badge {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}
.seo-badge--green  { background: #d1f4e0; color: #155f3a; }
.seo-badge--yellow { background: #fff5d1; color: #6c5512; }
.seo-badge--red    { background: #ffd5d1; color: #8a2419; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1100px) {
  .container { padding: 16px 24px 64px; }
  .nav { display: none; }
  .search { display: none; }
  .btn-ghost { display: none; }
  .hero { grid-template-columns: 1fr; gap: 16px; align-items: start; }
  .hero-meta { text-align: left; align-items: flex-start; }
  .hero-title { font-size: 64px; }
  .hero-lead { max-width: 100%; }
  .board { grid-template-columns: repeat(8, 1fr); grid-auto-rows: minmax(72px, auto); }
  .board > * { grid-column: span 8 !important; grid-row: auto !important; }
  .block--pawn { grid-column: span 4 !important; }
  .news-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 24px; }
  .news-item:nth-child(3) {
    grid-column: span 2;
    border-left: 0;
    padding-left: 0;
    padding-top: 20px;
    margin-top: 4px;
    border-top: 1px solid var(--gray-200);
  }
  .elo-value { font-size: 120px; }
  .king-name { font-size: 32px; }
  .section-head h2 { font-size: 32px; }
  .course-title { font-size: 28px; }
  .article-title { font-size: 42px; }
}

@media (max-width: 700px) {
  .container { padding: 12px 16px 48px; }
  .topbar { gap: 12px; padding: 12px 0; margin-bottom: 24px; }
  .logo { font-size: 18px; gap: 8px; }
  .logo-mark { font-size: 22px; }
  .logo-meta { display: none; }
  .topbar-actions { gap: 8px; }
  .btn-primary { padding: 8px 14px; font-size: 13px; }
  .hero { gap: 12px; padding: 16px 0 20px; }
  .hero-title { font-size: 40px; line-height: 1; }
  .hero-lead { font-size: 15px; line-height: 1.4; }
  .label-meta { font-size: 10px; letter-spacing: 0.1em; }
  .section-head { margin: 40px 0 12px; align-items: end; gap: 12px; }
  .section-head h2 { font-size: 26px; }
  .section-head a { font-size: 11px; }
  .board { grid-template-columns: repeat(4, 1fr); gap: 8px; grid-auto-rows: auto; }
  .board > * { grid-column: span 4 !important; grid-row: auto !important; }
  .block--pawn { grid-column: span 2 !important; }
  .block { padding: var(--pad-sm); }
  .block--king { padding: 20px; }
  .block--pawn { padding: 14px; }
  .king-handle { margin-bottom: 16px; font-size: 13px; }
  .king-id { padding-bottom: 16px; gap: 12px; }
  .avatar { width: 44px; height: 44px; font-size: 14px; }
  .king-name { font-size: 22px; }
  .elo-value { font-size: 80px; line-height: 0.9; letter-spacing: -0.04em; }
  .elo-meta { font-size: 12px; flex-wrap: wrap; gap: 4px 8px; }
  .queen-title { font-size: 19px; }
  .new-name { font-size: 24px; }
  .course-title { font-size: 22px; }
  .course-author { font-size: 12px; }
  .stat-value { font-size: 28px; }
  .stat-caption { font-size: 12px; }
  .knight-question { font-size: 19px; margin-bottom: 16px; line-height: 1.2; }
  .vs-row { grid-template-columns: 1fr; gap: 10px; }
  .vs-divider { display: none; }
  .vs-side { min-height: auto; padding: 14px; }
  .vs-claim { font-size: 13px; }
  .bishop-title { font-size: 17px; }
  .bishop-foot { font-size: 12px; margin-top: 16px; }
  .rook-title { font-size: 17px; }
  .rook-sub { font-size: 13px; margin-bottom: 12px; }
  .table th, .table td { padding: 10px 6px 10px 0; font-size: 13px; }
  .table th:nth-child(3),
  .table td:nth-child(3),
  .table th:nth-child(6),
  .table td:nth-child(6) { display: none; }
  .person { gap: 10px; }
  .person-handle { display: none; }
  .person-name { font-size: 13px; }
  .avatar-sm { width: 28px; height: 28px; font-size: 10px; }
  .title-tag { font-size: 9px; padding: 2px 6px; letter-spacing: 0.06em; }
  .elo-num { font-size: 13px; }
  .delta-cell { font-size: 11px; }
  .course-cta { flex-direction: column; align-items: flex-start; gap: 16px; padding-top: 20px; }
  .course-stats { gap: 20px; flex-wrap: wrap; }
  .news-grid { grid-template-columns: 1fr; gap: 0; }
  .news-item {
    border-left: 0 !important;
    padding-left: 0 !important;
    padding-top: 16px;
    margin-top: 16px;
    border-top: 1px solid var(--gray-200);
  }
  .news-item:first-child { border-top: 0; padding-top: 0; margin-top: 0; }
  .news-item:nth-child(3) { grid-column: auto; }
  .footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-top: 20px;
    margin-top: 56px;
    font-size: 11px;
  }
  .footer-coords { display: none; }
  :root {
    --grid-cell: 96px;
    --grid-opacity: 0.11;
  }
  .btn { min-height: 38px; }
  a, button { -webkit-tap-highlight-color: transparent; }
  @media (hover: none) {
    .block:hover { transform: none; }
    .block:hover .arrow { transform: none; }
  }

  /* Article page */
  .article-page { padding: 16px 16px 64px; }
  .article-title { font-size: 32px; line-height: 1.1; }
  .article-excerpt { font-size: 17px; }
  .article-body { font-size: 16px; }
  .article-body h2 { font-size: 24px; margin-top: 40px; }
  .article-body h3 { font-size: 19px; margin-top: 28px; }
  .article-body pre { font-size: 12px; padding: 14px 16px; }
}

@media (max-width: 400px) {
  .container { padding: 10px 12px 32px; }
  .hero-title { font-size: 32px; }
  .elo-value { font-size: 64px; }
  .king-name { font-size: 19px; }
  .section-head h2 { font-size: 22px; }
  .board { gap: 6px; }
  .topbar-actions .btn-primary { padding: 7px 12px; font-size: 12px; }
}