:root {
  --bg: #f7f0e3;
  --paper: #fffaf0;
  --paper-2: #efe2c8;
  --ink: #24170f;
  --muted: #6d5d4d;
  --brand: #0f6b58;
  --brand-2: #b3472f;
  --gold: #c9972a;
  --green-soft: #d9eadf;
  --rule: #dcc9a9;
  --shadow: 0 24px 70px rgba(58, 35, 15, .16);
  --radius: 24px;
  --chinese-red: #b91c1c;
  --chinese-gold: #c9972a;
  --chinese-green: #2d5a27;
  --chinese-ink: #1a1a1a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(201, 151, 42, .22), transparent 28rem),
    radial-gradient(circle at 92% 18%, rgba(15, 107, 88, .15), transparent 26rem),
    radial-gradient(circle at 50% 80%, rgba(185, 28, 28, .06), transparent 30rem),
    linear-gradient(135deg, #f7f0e3 0%, #f3e4c8 46%, #fff6e4 100%);
}

/* Chinese cloud pattern overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .18;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cpath d='M20 40 Q30 20 40 40 Q50 20 60 40 Q55 50 50 45 Q45 55 40 45 Q35 55 30 45 Q25 50 20 40Z' fill='none' stroke='%23b91c1c' stroke-width='0.6' opacity='0.4'/%3E%3Cpath d='M0 60 Q15 45 25 60 Q35 45 45 60 Q40 70 35 65 Q30 75 25 65 Q20 75 15 65 Q10 70 0 60Z' fill='none' stroke='%23c9972a' stroke-width='0.5' opacity='0.3'/%3E%3C/svg%3E");
  background-size: 80px 80px;
}

/* Lattice pattern corner decoration */
body::after {
  content: "";
  position: fixed;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  pointer-events: none;
  opacity: .06;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Crect x='0' y='0' width='18' height='18' fill='none' stroke='%23b91c1c' stroke-width='1'/%3E%3Crect x='22' y='0' width='18' height='18' fill='none' stroke='%23b91c1c' stroke-width='1'/%3E%3Crect x='0' y='22' width='18' height='18' fill='none' stroke='%23b91c1c' stroke-width='1'/%3E%3Crect x='22' y='22' width='18' height='18' fill='none' stroke='%23b91c1c' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 40px 40px;
}

a {
  color: var(--brand);
  text-underline-offset: 4px;
}

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(247, 240, 227, .82);
  border-bottom: 1px solid rgba(220, 201, 169, .7);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: 1.2rem;
}

.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--brand);
  color: #fff8e7;
  box-shadow: 0 8px 18px rgba(15, 107, 88, .25);
  font-family: Arial, sans-serif;
}

.nav-links {
  display: flex;
  gap: 18px;
  align-items: center;
  font-family: Arial, sans-serif;
  font-size: .94rem;
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
  opacity: .82;
}

.nav-links a:hover { opacity: 1; color: var(--brand); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff8e7;
  text-decoration: none;
  font-family: Arial, sans-serif;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(15, 107, 88, .24);
}

.btn.secondary {
  background: transparent;
  color: var(--brand);
  box-shadow: none;
}

.hero {
  position: relative;
  padding: 76px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--brand);
  background: rgba(15, 107, 88, .1);
  border: 1px solid rgba(15, 107, 88, .18);
  font-family: Arial, sans-serif;
  font-weight: 800;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}

h1, h2, h3 {
  line-height: 1.08;
  letter-spacing: -.035em;
}

h1 {
  margin: 20px 0 18px;
  font-size: clamp(2.65rem, 8vw, 5.9rem);
  max-width: 780px;
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 4vw, 3.25rem);
}

h3 {
  margin: 0 0 12px;
  font-size: 1.45rem;
}

.lead {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.65;
  color: var(--muted);
  max-width: 740px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 0;
}

.hero-card {
  position: relative;
  background: rgba(255, 250, 240, .86);
  border: 1px solid rgba(220, 201, 169, .9);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: -40px auto auto -40px;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: rgba(214, 163, 61, .22);
}

.mini-board {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  position: relative;
}

.mini-tile {
  aspect-ratio: 3 / 4;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: linear-gradient(145deg, #fffaf0, #e8d5b2);
  border: 1px solid #ccb48a;
  box-shadow: 0 8px 0 #b7955c, 0 16px 26px rgba(70, 38, 12, .16);
  font: 800 1.4rem Arial, sans-serif;
  color: var(--brand);
}

.section {
  padding: 62px 0;
}

.section-intro {
  max-width: 790px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

/* Game gallery styles */
.game-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}

.game-card {
  display: block;
  background: rgba(255, 250, 240, .9);
  border: 1px solid var(--rule);
  border-radius: 22px;
  overflow: hidden;
  text-decoration: none;
  color: var(--ink);
  box-shadow: 0 14px 40px rgba(58, 35, 15, .1);
  transition: transform .22s ease, box-shadow .22s ease;
}

.game-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(58, 35, 15, .18);
}

.game-card-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--rule);
}

.game-card-body {
  padding: 18px 20px 20px;
}

.game-card-body h3 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.game-card-body p {
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.55;
}

.game-card-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(15, 107, 88, .1);
  color: var(--brand);
  font-family: Arial, sans-serif;
  font-weight: 800;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.card {
  background: rgba(255, 250, 240, .84);
  border: 1px solid var(--rule);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 18px 45px rgba(58, 35, 15, .09);
}

.card p { color: var(--muted); line-height: 1.65; margin: 0; }

.game-shell {
  margin: 28px 0;
  background: rgba(255, 250, 240, .92);
  border: 1px solid var(--rule);
  border-radius: 30px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.game-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 4px 18px;
  font-family: Arial, sans-serif;
}

.game-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stat {
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 8px 12px;
  background: #fff7e7;
  color: var(--muted);
  font-weight: 700;
}

.stat strong { color: var(--ink); }

.game-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

button {
  font: 800 .92rem Arial, sans-serif;
}

.board-wrap {
  position: relative;
  min-height: 470px;
  overflow: auto;
  border-radius: 22px;
  border: 1px solid rgba(220, 201, 169, .8);
  background:
    linear-gradient(90deg, rgba(15, 107, 88, .06) 1px, transparent 1px),
    linear-gradient(rgba(15, 107, 88, .06) 1px, transparent 1px),
    #efe0c2;
  background-size: 28px 28px;
}

#mahjong-board {
  position: relative;
  width: 840px;
  height: 500px;
  margin: 20px auto;
}

/* Traditional Chinese Mahjong tile styling */
.tile {
  position: absolute;
  width: 58px;
  height: 74px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(145deg, #fffdf5 0%, #f5ecd8 40%, #efe2c7 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.8),
    0 5px 0 #a08050,
    0 11px 16px rgba(69, 40, 15, .22);
  color: var(--ink);
  cursor: pointer;
  transition: transform .16s ease, filter .16s ease, box-shadow .16s ease;
  display: grid;
  place-items: center;
  padding: 0;
  overflow: hidden;
}

/* Tile face inner border - traditional look */
.tile::before {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 6px;
  border: 1px solid rgba(160, 128, 80, .25);
  pointer-events: none;
}

.tile:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.8),
    0 8px 0 #a08050,
    0 18px 22px rgba(69, 40, 15, .24);
}

.tile.selected {
  outline: 3px solid var(--gold);
  transform: translateY(-4px);
}

.tile.hint {
  animation: hintPulse 1s ease-in-out 3;
}

.tile:disabled {
  cursor: default;
  opacity: .32;
  filter: grayscale(.3);
}

.tile-symbol {
  font-size: 1.6rem;
  line-height: 1;
  font-family: "Segoe UI Emoji", "Apple Color Emoji", "Noto Color Emoji", Arial, sans-serif;
  display: block;
}

.tile-name {
  display: block;
  margin-top: 2px;
  font: 700 .46rem Arial, sans-serif;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 52px;
}

.message {
  min-height: 28px;
  margin-top: 12px;
  font-family: Arial, sans-serif;
  color: var(--muted);
  font-weight: 700;
}

@keyframes hintPulse {
  50% { transform: translateY(-6px) scale(1.05); outline: 3px solid var(--brand-2); }
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, .85fr);
  gap: 28px;
  align-items: start;
}

.article {
  background: rgba(255, 250, 240, .82);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 28px;
}

.article p, .article li {
  color: var(--muted);
  line-height: 1.78;
}

.article strong { color: var(--ink); }

.sidebox {
  position: sticky;
  top: 84px;
  background: var(--green-soft);
  border: 1px solid rgba(15, 107, 88, .2);
  border-radius: var(--radius);
  padding: 22px;
}

.sidebox ul {
  margin: 0;
  padding-left: 18px;
}

.ad-slot {
  margin: 28px 0;
  border: 1px dashed rgba(109, 93, 77, .5);
  background: rgba(255, 250, 240, .6);
  border-radius: 18px;
  padding: 18px;
  min-height: 96px;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--muted);
  font: 700 .86rem Arial, sans-serif;
}

.faq details {
  background: rgba(255, 250, 240, .84);
  border: 1px solid var(--rule);
  border-radius: 18px;
  margin: 12px 0;
  padding: 16px 18px;
}

.faq summary {
  cursor: pointer;
  font-weight: 900;
}

.faq p { color: var(--muted); margin: 12px 0 0; }

.footer {
  margin-top: 60px;
  padding: 44px 0;
  background: rgba(36, 23, 15, .94);
  color: #fff6e4;
}

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

.footer a { color: #ffe2a2; }
.footer p { color: rgba(255, 246, 228, .76); margin: 8px 0 0; }

/* ========== Connect game styles ========== */
.connect-board {
  position: relative;
  margin: 20px auto;
}

.connect-grid {
  display: grid;
  gap: 6px;
  justify-content: center;
}

.connect-tile {
  width: 52px;
  height: 66px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(145deg, #fffdf5 0%, #f5ecd8 40%, #efe2c7 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.8),
    0 4px 0 #a08050,
    0 8px 12px rgba(69, 40, 15, .18);
  cursor: pointer;
  transition: transform .14s ease, box-shadow .14s ease, opacity .2s ease;
  display: grid;
  place-items: center;
  padding: 0;
  position: relative;
}

.connect-tile::before {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 6px;
  border: 1px solid rgba(160, 128, 80, .25);
  pointer-events: none;
}

.connect-tile:hover {
  transform: translateY(-2px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.8),
    0 6px 0 #a08050,
    0 12px 16px rgba(69, 40, 15, .2);
}

.connect-tile.selected {
  outline: 3px solid var(--gold);
  transform: translateY(-2px);
}

.connect-tile.matched {
  opacity: 0;
  transform: scale(.6);
  pointer-events: none;
}

.connect-tile .tile-symbol {
  font-size: 1.45rem;
}

.connect-line {
  position: absolute;
  background: var(--gold);
  border-radius: 2px;
  pointer-events: none;
  z-index: 10;
  opacity: 0;
  transition: opacity .15s ease;
}

.connect-line.show {
  opacity: 1;
}

/* ========== Memory game styles ========== */
.memory-board {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  max-width: 600px;
  margin: 20px auto;
  justify-items: center;
}

.memory-card {
  width: 80px;
  height: 100px;
  perspective: 600px;
  cursor: pointer;
  border: 0;
  background: transparent;
  padding: 0;
}

.memory-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform .5s cubic-bezier(.4, 0, .2, 1);
  transform-style: preserve-3d;
}

.memory-card.flipped .memory-card-inner,
.memory-card.matched .memory-card-inner {
  transform: rotateY(180deg);
}

.memory-card-front,
.memory-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 12px;
  display: grid;
  place-items: center;
}

.memory-card-front {
  background: linear-gradient(145deg, #b91c1c 0%, #8b1538 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.2),
    0 5px 0 #6b1028,
    0 12px 20px rgba(69, 40, 15, .25);
}

.memory-card-front::before {
  content: "🀫";
  font-size: 2.2rem;
  opacity: .7;
}

.memory-card-back {
  background: linear-gradient(145deg, #fffdf5 0%, #f5ecd8 40%, #efe2c7 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.8),
    0 5px 0 #a08050,
    0 12px 20px rgba(69, 40, 15, .22);
  transform: rotateY(180deg);
}

.memory-card-back::before {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 8px;
  border: 1px solid rgba(160, 128, 80, .25);
  pointer-events: none;
}

.memory-card-back .tile-symbol {
  font-size: 2rem;
}

.memory-card.matched .memory-card-back {
  background: linear-gradient(145deg, #d9eadf 0%, #b8d4c4 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.8),
    0 5px 0 #7aad8e,
    0 12px 20px rgba(69, 40, 15, .22);
}

@media (max-width: 900px) {
  .hero-grid, .content-grid { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .game-gallery { grid-template-columns: 1fr; }
  .sidebox { position: static; }
  h1 { font-size: clamp(2.4rem, 14vw, 4.6rem); }
  .nav { align-items: flex-start; }
  .nav-links { flex-wrap: wrap; justify-content: flex-end; }
  .memory-board { grid-template-columns: repeat(4, 1fr); }
  .memory-card { width: 70px; height: 88px; }
}

@media (max-width: 640px) {
  .wrap { width: min(100% - 22px, 1120px); }
  .hero { padding-top: 44px; }
  .nav { flex-direction: column; }
  .nav-links { justify-content: flex-start; font-size: .88rem; }
  .game-shell { padding: 10px; border-radius: 22px; }
  .board-wrap { min-height: 390px; }
  #mahjong-board { transform: scale(.78); transform-origin: top left; margin-left: 4px; }
  .footer-grid { grid-template-columns: 1fr; }
  .memory-board { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .memory-card { width: 64px; height: 80px; }
  .connect-tile { width: 44px; height: 56px; }
  .connect-tile .tile-symbol { font-size: 1.2rem; }
}