/* ============================
   TAK RULES — CSS
   takrules.com
   ============================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --ink: #1a120a;
  --ink-faded: #3d2b1a;
  --paper: #f5ead6;
  --paper-dark: #e8d5b0;
  --paper-mid: #eddfc0;
  --accent: #7a3a18;
  --accent-light: #b05a28;
  --accent-glow: rgba(176, 90, 40, 0.3);
  --rule: #c4a46b;
  --rule-faint: rgba(196, 164, 107, 0.25);
  --dark-bg: #120a04;
  --dark-mid: #1e1108;
  --dark-card: #1a0f06;
  --text-light: #e8d5b0;
  --text-muted: #9a8060;
  --shadow-dark: rgba(0, 0, 0, 0.6);
  --shadow-warm: rgba(60, 30, 10, 0.4);
  --font-display: 'IM Fell English', Georgia, serif;
  --font-sc: 'IM Fell English SC', Georgia, serif;
  --font-body: 'Crimson Pro', Georgia, serif;
  --nav-h: 60px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--dark-bg);
  color: var(--text-light);
  overflow-x: hidden;
  font-size: 17px;
  line-height: 1.7;
}

/* Background Canvas */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
}

/* ============================
   NAVIGATION
   ============================ */

#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

#site-nav.scrolled {
  background: rgba(18, 10, 4, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--rule-faint);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-sc);
  font-size: 22px;
  letter-spacing: 0.35em;
  color: var(--rule);
  text-decoration: none;
  transition: color var(--transition);
}
.nav-logo:hover { color: var(--paper); }

.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-family: var(--font-sc);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--paper); }

/* ============================
   HERO
   ============================ */

#hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--nav-h) 32px 80px;
  gap: 80px;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 70% at 30% 50%, rgba(122, 58, 24, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 70% 40%, rgba(196, 164, 107, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 520px;
  animation: fadeUp 1s ease both;
}

.eyebrow {
  display: block;
  font-family: var(--font-sc);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--accent-light);
  margin-bottom: 16px;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(80px, 14vw, 140px);
  font-weight: 400;
  color: var(--paper);
  line-height: 0.9;
  letter-spacing: 0.08em;
  margin-bottom: 24px;
  text-shadow: 0 0 60px var(--accent-glow);
}

.hero-sub {
  font-size: 20px;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.6;
  margin-bottom: 28px;
}

.hero-ornament {
  color: var(--rule);
  letter-spacing: 0.4em;
  font-size: 14px;
  margin-bottom: 36px;
}

.btn-primary {
  display: inline-block;
  font-family: var(--font-sc);
  font-size: 13px;
  letter-spacing: 0.25em;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--rule);
  padding: 14px 36px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}
.btn-primary:hover::before { transform: scaleX(1); }
.btn-primary:hover { border-color: var(--accent); }

/* Hero Board Visual */
.hero-board {
  position: relative;
  z-index: 1;
  animation: fadeUp 1s 0.2s ease both;
}

.board-visual {
  display: grid;
  grid-template-columns: repeat(5, 60px);
  grid-template-rows: repeat(5, 60px);
  gap: 4px;
  padding: 16px;
  background: rgba(196, 164, 107, 0.06);
  border: 1px solid var(--rule-faint);
}

.board-visual .cell {
  width: 60px;
  height: 60px;
  background: rgba(196, 164, 107, 0.05);
  border: 1px solid rgba(196, 164, 107, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.5s;
}

.board-visual .cell.light-flat {
  background: radial-gradient(circle at 40% 35%, #f5ead6, #c4a46b);
  border-color: #c4a46b;
  box-shadow: inset 0 2px 4px rgba(255,255,255,0.2), 0 2px 8px rgba(0,0,0,0.4);
}
.board-visual .cell.dark-flat {
  background: radial-gradient(circle at 40% 35%, #5a3a20, #2a1a0a);
  border-color: #7a5030;
  box-shadow: inset 0 2px 4px rgba(255,255,255,0.05), 0 2px 8px rgba(0,0,0,0.6);
}
.board-visual .cell.light-wall {
  background: linear-gradient(180deg, #f5ead6 0%, #c4a46b 100%);
  border-color: #c4a46b;
  border-radius: 0 0 2px 2px;
  height: 40px;
  align-self: end;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}
.board-visual .cell.dark-cap {
  background: radial-gradient(circle at 40% 30%, #7a5030, #1a0a04);
  border-color: #c4a46b;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  box-shadow: 0 4px 16px rgba(196, 164, 107, 0.3);
}

/* ============================
   SECTIONS SHARED
   ============================ */

section {
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 100px 32px;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.section-desc {
  font-size: 18px;
  color: var(--text-muted);
  font-style: italic;
  max-width: 540px;
  margin: 0 auto;
}

/* ============================
   CALCULATOR SECTION
   ============================ */

#calculator {
  background: linear-gradient(180deg, var(--dark-bg) 0%, var(--dark-mid) 100%);
  border-top: 1px solid var(--rule-faint);
  border-bottom: 1px solid var(--rule-faint);
}

.board-selector {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.board-btn {
  font-family: var(--font-sc);
  font-size: 14px;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid rgba(196, 164, 107, 0.2);
  padding: 10px 22px;
  cursor: pointer;
  transition: all var(--transition);
}
.board-btn:hover {
  border-color: var(--rule);
  color: var(--paper);
}
.board-btn.active {
  border-color: var(--accent-light);
  color: var(--paper);
  background: rgba(176, 90, 40, 0.15);
  box-shadow: 0 0 20px rgba(176, 90, 40, 0.15);
}

.calc-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 64px;
  align-items: start;
  justify-items: start;
}

.calc-board-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.calc-board {
  display: grid;
  gap: 3px;
  padding: 12px;
  background: rgba(196, 164, 107, 0.04);
  border: 1px solid var(--rule-faint);
  transition: all 0.4s ease;
}

.calc-board .sq {
  background: rgba(196, 164, 107, 0.06);
  border: 1px solid rgba(196, 164, 107, 0.1);
  transition: background 0.3s;
}

.board-label {
  font-family: var(--font-sc);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--text-muted);
}

.calc-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-top: 12px;
}

.piece-counts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.count-card {
  background: var(--dark-card);
  border: 1px solid var(--rule-faint);
  padding: 20px 24px;
  transition: border-color var(--transition);
}
.count-card:hover { border-color: var(--rule); }

.count-label {
  display: block;
  font-family: var(--font-sc);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.count-value {
  font-family: var(--font-display);
  font-size: 42px;
  color: var(--paper);
  line-height: 1;
}

.count-sub {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  font-style: italic;
}

.carry-note {
  background: rgba(122, 58, 24, 0.12);
  border-left: 3px solid var(--accent);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}
.carry-note strong { color: var(--paper); }

.note-block {
  background: var(--dark-card);
  border: 1px solid var(--rule-faint);
  padding: 18px 20px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}
.note-block strong { color: var(--paper); }
.note-block em { color: var(--accent-light); font-style: italic; }

/* ============================
   RULES SECTION
   ============================ */

#rules {
  background: var(--dark-bg);
}

.rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 64px;
}

.rule-card {
  background: var(--dark-card);
  border: 1px solid var(--rule-faint);
  padding: 36px 32px;
  transition: border-color var(--transition), transform var(--transition);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s;
}
.rule-card.visible {
  opacity: 1;
  transform: translateY(0);
}
.rule-card:hover { border-color: var(--rule); }

.rule-icon {
  font-size: 28px;
  color: var(--rule);
  margin-bottom: 16px;
  line-height: 1;
}

h3 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}

.rule-card p, .rule-card li {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
}
.rule-card ul {
  padding-left: 1.2em;
  margin-top: 8px;
}
.rule-card li { margin-bottom: 6px; }
.rule-card li::marker { color: var(--accent-light); }
.rule-card strong { color: var(--text-light); }
.rule-card em { color: var(--accent-light); font-style: italic; }

/* Win Section */
.win-section {
  border-top: 1px solid var(--rule-faint);
  padding-top: 56px;
}

.win-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 400;
  color: var(--paper);
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: 0.03em;
}

.win-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.win-card {
  padding: 40px 36px;
  border: 1px solid var(--rule-faint);
  position: relative;
  overflow: hidden;
}
.win-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}
.win-card.road::before { background: linear-gradient(90deg, var(--accent), var(--accent-light)); }
.win-card.flat::before { background: linear-gradient(90deg, var(--rule), var(--paper-dark)); }

.win-icon {
  font-size: 32px;
  color: var(--rule);
  margin-bottom: 16px;
}

.win-card h4 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 14px;
}

.win-card p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 12px;
}
.win-card p:last-child { margin-bottom: 0; }
.win-card strong { color: var(--text-light); }
.win-card em { color: var(--accent-light); font-style: italic; }

.win-note {
  font-size: 14px !important;
  color: var(--rule) !important;
  font-style: italic;
  border-top: 1px solid var(--rule-faint);
  padding-top: 12px;
  margin-top: 16px !important;
}

/* ============================
   STRATEGY SECTION
   ============================ */

#strategy {
  background: var(--dark-mid);
  border-top: 1px solid var(--rule-faint);
}

.strategy-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.strategy-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0;
  border-bottom: 1px solid var(--rule-faint);
  padding: 32px 0;
  transition: background var(--transition);
  align-items: start;
}
.strategy-item:first-child { border-top: 1px solid var(--rule-faint); }
.strategy-item:hover {
  background: rgba(196, 164, 107, 0.03);
  padding-left: 12px;
  padding-right: 12px;
}

.strat-num {
  font-family: var(--font-sc);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--accent-light);
  padding-top: 4px;
}

.strat-body h4 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  color: var(--paper);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.strat-body p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 680px;
}

/* ============================
   FOOTER
   ============================ */

#site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--rule-faint);
  padding: 60px 32px;
  text-align: center;
  background: var(--dark-bg);
}

.footer-inner {
  max-width: 480px;
  margin: 0 auto;
}

.footer-ornament {
  color: var(--rule);
  letter-spacing: 0.4em;
  font-size: 14px;
  margin-bottom: 20px;
}

.footer-title {
  font-family: var(--font-sc);
  font-size: 28px;
  letter-spacing: 0.4em;
  color: var(--rule);
  margin-bottom: 16px;
}

.footer-sub {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-sub em { color: var(--accent-light); font-style: italic; }

.footer-print {
  margin-bottom: 16px;
}
.footer-print a {
  font-family: var(--font-sc);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
.footer-print a:hover { color: var(--paper); }

.footer-credit {
  font-family: var(--font-sc);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(154, 128, 96, 0.5);
}

/* ============================
   SCREEN READER ONLY
   ============================ */

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

/* ============================
   HERO INTRO
   ============================ */

.hero-intro {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 480px;
}

.hero-intro cite {
  color: var(--accent-light);
  font-style: italic;
}

/* ============================
   FAQ SECTION
   ============================ */

#faq {
  background: var(--dark-bg);
  border-top: 1px solid var(--rule-faint);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--rule-faint);
}
.faq-item:first-child {
  border-top: 1px solid var(--rule-faint);
}

.faq-question {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  color: var(--paper);
  padding: 24px 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  font-family: var(--font-sc);
  font-size: 22px;
  color: var(--rule);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] .faq-question::after {
  content: '−';
}
.faq-question:hover { color: var(--accent-light); }

.faq-answer {
  padding: 0 0 24px;
}
.faq-answer p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer strong { color: var(--text-light); }
.faq-answer cite { color: var(--accent-light); font-style: italic; }
.faq-answer a {
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.faq-answer a:hover { color: var(--paper); }

/* ============================
   ANIMATIONS
   ============================ */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@media (max-width: 900px) {
  #hero {
    flex-direction: column;
    text-align: center;
    gap: 48px;
    padding-top: calc(var(--nav-h) + 40px);
  }

  h1 { font-size: clamp(56px, 12vw, 100px); }
  .hero-sub { font-size: 17px; }
  .rules-grid { grid-template-columns: 1fr; }
  .win-grid { grid-template-columns: 1fr; }
  .calc-layout { grid-template-columns: 1fr; }
  .calc-board-wrap { width: 100%; }
  .piece-counts { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  h1 { font-size: clamp(48px, 10vw, 72px); }
  h2 { font-size: clamp(28px, 5vw, 40px); }
  .eyebrow { font-size: 10px; }
  .hero-sub { font-size: 15px; }
  .hero-intro { font-size: 13px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 10px; letter-spacing: 0.1em; }
  .nav-logo { font-size: 16px; letter-spacing: 0.25em; }
  .container { padding: 60px 20px; }
  .section-header { margin-bottom: 40px; }
  .piece-counts { grid-template-columns: 1fr; }
  .strategy-item { grid-template-columns: 56px 1fr; }
  .strat-body h4 { font-size: 18px; }
  .strat-body p { font-size: 15px; }
  .inner-border, .page { padding: 28px 16px; }
  .board-visual { display: none; }
  .faq-question { font-size: 17px; }
  .btn-primary { font-size: 12px; padding: 12px 28px; }
}