/* ===== CSS variables & theme (international / product-style) ===== */
:root {
  --font-sans: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --bg-base: #08090d;
  --bg-elevated: rgba(16, 18, 26, 0.78);
  --text: #f1f3f9;
  --text-muted: rgba(241, 243, 249, 0.52);
  --border: rgba(255, 255, 255, 0.07);
  --accent: #6366f1;
  --accent-2: #22d3ee;
  --glow: rgba(99, 102, 241, 0.32);
  --card-blur: 20px;
  --radius: 18px;
  --radius-sm: 10px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-base: #f3f4f8;
  --bg-elevated: rgba(255, 255, 255, 0.88);
  --text: #0f1117;
  --text-muted: rgba(15, 17, 23, 0.48);
  --border: rgba(15, 17, 23, 0.07);
  --glow: rgba(99, 102, 241, 0.18);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.01em;
  color: var(--text);
  background: var(--bg-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 85% 55% at 12% -8%, rgba(99, 102, 241, 0.32), transparent 52%),
    radial-gradient(ellipse 65% 50% at 92% 8%, rgba(34, 211, 238, 0.14), transparent 48%),
    radial-gradient(ellipse 50% 42% at 48% 105%, rgba(129, 140, 248, 0.1), transparent 52%),
    var(--bg-base);
  transition: opacity var(--transition);
}

.noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== Header ===== */
.site-header-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 1000;
  padding: 10px 18px;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: 0 4px 20px var(--glow);
}

.skip-link:focus {
  left: 16px;
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 22px;
  background: var(--bg-elevated);
  backdrop-filter: blur(var(--card-blur));
  -webkit-backdrop-filter: blur(var(--card-blur));
  border-bottom: 1px solid var(--border);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.logo-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

.logo-title {
  font-size: 1.1rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.logo-sub {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.logo-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent) 0%, #4f46e5 50%, var(--accent-2) 100%);
  color: #fff;
  font-size: 0.95rem;
  box-shadow: 0 4px 24px var(--glow);
}

.nav-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-width: min(720px, 100%);
}

.nav-tab,
a.nav-link {
  border: none;
  padding: 8px 12px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), transform 0.15s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.nav-tab:hover,
a.nav-link:hover {
  color: var(--text);
  background: rgba(99, 102, 241, 0.12);
}

.nav-tab.active,
a.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  box-shadow: 0 4px 16px var(--glow);
}

[data-theme="light"] .nav-tab.active,
[data-theme="light"] a.nav-link.active {
  color: #fff;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  font-size: 1.2rem;
  cursor: pointer;
  transition: transform 0.15s ease, border-color var(--transition);
}

.theme-toggle:hover {
  transform: scale(1.05);
  border-color: var(--accent);
}

/* Announcement strip (home) */
.announcement-strip {
  border-bottom: 1px solid var(--border);
  background: rgba(99, 102, 241, 0.06);
}

.announcement-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 14px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text);
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 10px rgba(34, 197, 94, 0.65);
  animation: statusPulse 2s ease infinite;
}

@keyframes statusPulse {
  50% {
    opacity: 0.75;
  }
}

.announcement-divider {
  opacity: 0.45;
}

/* Trust row (home) */
.trust-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 8px 0 36px;
}

.trust-item {
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(8px);
}

.trust-item strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 6px;
}

.trust-item span:last-child {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* How it works steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}

.step-card {
  position: relative;
  padding: 22px 20px 22px 56px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(99, 102, 241, 0.05);
}

.step-num {
  position: absolute;
  left: 16px;
  top: 20px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #4f46e5);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.step-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.step-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* 404 */
.error-page {
  text-align: center;
  padding: 24px 0 48px;
  max-width: 520px;
  margin: 0 auto;
}

.error-code {
  font-size: clamp(4rem, 14vw, 6rem);
  font-weight: 800;
  line-height: 1;
  margin: 0 0 16px;
  background: linear-gradient(105deg, #a5b4fc, #6366f1 40%, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.06em;
}

.error-page .page-title {
  margin-bottom: 12px;
}

.error-page .page-lead {
  margin-left: auto;
  margin-right: auto;
}

.error-page .hero-cta {
  justify-content: center;
}

/* ===== Main ===== */
.main {
  flex: 1 0 auto;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px 48px;
  box-sizing: border-box;
}

.main-wide {
  max-width: 1100px;
}

.page-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 0 28px;
  line-height: 1.65;
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.content-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
}

@media (max-width: 768px) {
  .content-columns {
    grid-template-columns: 1fr;
  }
}

.prose-block {
  padding: 22px;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.prose-block h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  color: var(--text);
}

.prose-block ul {
  margin: 0;
  padding-left: 1.2em;
}

.prose-block li + li {
  margin-top: 8px;
}

.link-inline {
  color: var(--accent-2);
  font-weight: 600;
  text-decoration: none;
}

.link-inline:hover {
  text-decoration: underline;
}

/* Game hub */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 8px;
}

.hub-card {
  display: block;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.hub-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: 0 20px 40px -20px var(--glow);
}

.hub-card .hub-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 8px;
}

.hub-card h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.hub-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Controls (forms) */
.control-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-bottom: 18px;
}

.control-row label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.select-control,
.input-control {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
}

.range-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 200px;
}

.range-wrap input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.stars-rating {
  font-size: 1.35rem;
  letter-spacing: 4px;
  margin-top: 8px;
}

.fortune-display--epic {
  border-color: rgba(250, 204, 21, 0.5) !important;
  box-shadow: 0 0 32px rgba(250, 204, 21, 0.12);
  animation: epicPulse 2s ease infinite;
}

@keyframes epicPulse {
  50% {
    box-shadow: 0 0 40px rgba(250, 204, 21, 0.2);
  }
}

.joke-reactions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  align-items: center;
}

.joke-reactions span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.btn-icon {
  padding: 10px 16px;
  font-size: 1.1rem;
}

.gradient-controls {
  display: grid;
  gap: 16px;
  margin-bottom: 20px;
}

.guess-history {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
  min-height: 36px;
}

.guess-chip {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--border);
}

.guess-chip.hot {
  border-color: rgba(239, 68, 68, 0.45);
  background: rgba(239, 68, 68, 0.1);
}

.guess-chip.warm {
  border-color: rgba(245, 158, 11, 0.45);
}

.guess-chip.cold {
  border-color: rgba(34, 211, 238, 0.35);
}

.decide-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.decide-result.is-spinning {
  opacity: 0.95;
  animation: spinGlow 0.6s ease infinite alternate;
}

@keyframes spinGlow {
  from {
    filter: brightness(1);
  }
  to {
    filter: brightness(1.15);
  }
}

.journal-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.journal-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

/* Memory game */
.memory-wrap {
  max-width: 540px;
  margin: 0 auto;
}

.memory-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  font-weight: 600;
}

.memory-board {
  display: grid;
  gap: 10px;
  margin: 0 auto;
}

.memory-board.cols-3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 360px;
}

.memory-board.cols-4 {
  grid-template-columns: repeat(4, 1fr);
  max-width: 440px;
}

.memory-board.cols-5 {
  grid-template-columns: repeat(5, 1fr);
  max-width: 520px;
}

.memory-card {
  position: relative;
  perspective: 600px;
  border: none;
  padding: 0;
  cursor: pointer;
  background: transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
}

.memory-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.memory-card-inner {
  position: relative;
  width: 100%;
  padding-bottom: 100%;
  transform-style: preserve-3d;
  transition: transform 0.35s ease;
  border-radius: var(--radius-sm);
}

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

.memory-card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: clamp(1.4rem, 5vw, 2rem);
  border: 1px solid var(--border);
}

.memory-card-back {
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.35), rgba(34, 211, 238, 0.15));
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
}

.memory-card-front {
  transform: rotateY(180deg);
  background: var(--bg-elevated);
}

.memory-card.matched .memory-card-front {
  opacity: 0.65;
  border-color: rgba(34, 197, 94, 0.5);
}

/* Snake */
.snake-panel {
  text-align: center;
}

.snake-canvas-wrap {
  display: inline-block;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  margin: 16px 0;
}

[data-theme="light"] .snake-canvas-wrap {
  background: rgba(22, 23, 29, 0.06);
}

#snakeCanvas {
  display: block;
  max-width: 100%;
  height: auto;
  touch-action: none;
}

.snake-hint {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.snake-controls {
  margin: 8px auto 0;
  display: grid;
  gap: 10px;
  justify-items: center;
  width: min(240px, 100%);
  user-select: none;
}

.snake-controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  width: 100%;
}

.snake-btn {
  width: 64px;
  height: 48px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(99, 102, 241, 0.12);
  color: var(--text);
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 800;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.snake-btn:active {
  transform: scale(0.98);
}

.snake-btn--center {
  background: rgba(34, 211, 238, 0.12);
}

@media (min-width: 900px) {
  .snake-controls {
    display: none;
  }
}

/* Guess number */
.guess-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin: 20px 0;
}

.guess-input {
  width: 120px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(99, 102, 241, 0.06);
  color: var(--text);
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 600;
}

.guess-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.guess-log {
  min-height: 4em;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 16px 0;
}

/* Whack */
.whack-panel {
  max-width: 520px;
  margin: 0 auto;
}

.whack-stats {
  display: flex;
  justify-content: space-between;
  font-weight: 700;
  margin-bottom: 16px;
}

.whack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.whack-grid.whack-4 {
  grid-template-columns: repeat(4, 1fr);
  max-width: 520px;
  margin: 0 auto;
}

.whack-hole {
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.12), transparent 40%),
    linear-gradient(180deg, rgba(22, 22, 28, 0.9), rgba(10, 10, 14, 0.95));
  border: 3px solid var(--border);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.08s ease, border-color var(--transition);
}

[data-theme="light"] .whack-hole {
  background: radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.5), transparent 40%),
    linear-gradient(180deg, #e8e9f0, #d4d6e0);
}

.whack-hole:active {
  transform: scale(0.96);
}

.whack-mole {
  position: absolute;
  left: 10%;
  right: 10%;
  bottom: -100%;
  height: 75%;
  background: linear-gradient(180deg, #92400e, #713f12);
  border-radius: 50% 50% 40% 40%;
  transition: bottom 0.12s ease;
  pointer-events: none;
}

.whack-mole::before {
  content: "";
  position: absolute;
  top: 18%;
  left: 20%;
  width: 18%;
  height: 18%;
  border-radius: 50%;
  background: #1a1a1a;
  box-shadow: 35px 0 0 #1a1a1a;
}

.whack-hole.up .whack-mole {
  bottom: 8%;
}

.whack-mole--golden {
  background: linear-gradient(180deg, #fbbf24, #d97706) !important;
  box-shadow: 0 -4px 16px rgba(251, 191, 36, 0.45);
}

.whack-mole--bomb {
  background: linear-gradient(180deg, #991b1b, #7f1d1d) !important;
  box-shadow: 0 -4px 16px rgba(239, 68, 68, 0.35);
}

.whack-mole--bomb::before {
  background: #fef2f2;
  box-shadow: 28px 0 0 #fef2f2;
}

.card-full {
  max-width: 640px;
}

.panel {
  display: none;
  animation: fadeUp 0.45s ease both;
}

.panel.active {
  display: block;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero */
.hero {
  padding: 20px 0 40px;
}

.hero-kicker {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(34, 211, 238, 0.85);
  margin: 0 0 14px;
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: linear-gradient(105deg, #a5b4fc, #6366f1 40%, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  max-width: 440px;
  color: var(--text-muted);
  margin: 0 0 28px;
  font-size: 1.05rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat strong {
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text), var(--text-muted));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.feature-card {
  display: block;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  color: inherit;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: 0 20px 40px -20px var(--glow);
}

.fc-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Cards & shared */
.card {
  padding: 28px;
  border-radius: var(--radius);
  max-width: 560px;
  margin: 0 auto;
}

.glass {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  backdrop-filter: blur(var(--card-blur));
  -webkit-backdrop-filter: blur(var(--card-blur));
  box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.35);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.muted {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow var(--transition), opacity var(--transition);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  box-shadow: 0 8px 24px var(--glow);
}

.btn-primary:hover {
  box-shadow: 0 12px 32px var(--glow);
}

.btn-ghost {
  color: var(--text);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: rgba(99, 102, 241, 0.45);
  background: rgba(99, 102, 241, 0.16);
}

.btn-block {
  width: 100%;
}

.row-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* Fortune */
.fortune-display {
  min-height: 120px;
  padding: 24px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.08);
  border: 1px dashed rgba(99, 102, 241, 0.25);
  margin-bottom: 8px;
}

.fortune-main {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 8px;
}

.fortune-sub {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Jokes */
.joke-block {
  margin: 0;
  padding: 24px;
  font-size: 1.1rem;
  line-height: 1.7;
  border-left: 4px solid var(--accent);
  background: rgba(99, 102, 241, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  min-height: 100px;
}

/* Reaction */
.reaction-area {
  height: 200px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  font-weight: 600;
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.2), rgba(34, 211, 238, 0.12));
  border: 2px solid var(--border);
  cursor: pointer;
  user-select: none;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  margin-top: 8px;
}

.reaction-area.waiting {
  background: #eab308;
  border-color: #ca8a04;
  color: #422006;
}

.reaction-area.ready {
  background: #22c55e;
  border-color: #16a34a;
  color: #052e16;
}

.reaction-area.too-early {
  background: #ef4444;
  border-color: #dc2626;
  color: #fff;
}

.reaction-result {
  min-height: 1.5em;
  margin: 16px 0 0;
  font-weight: 600;
  color: var(--accent-2);
}

/* Tic-tac-toe */
.ttt-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  max-width: 280px;
  margin: 20px auto;
  aspect-ratio: 1;
}

.ttt-cell {
  border: none;
  border-radius: var(--radius-sm);
  font-size: 2rem;
  font-weight: 700;
  font-family: inherit;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition), transform 0.1s ease;
}

.ttt-cell:hover:not(:disabled) {
  background: rgba(99, 102, 241, 0.2);
}

.ttt-cell:disabled {
  cursor: default;
  opacity: 0.85;
}

.ttt-cell .x {
  color: #38bdf8;
}

.ttt-cell .o {
  color: var(--accent-2);
}

.ttt-status {
  text-align: center;
  font-weight: 600;
  margin: 16px 0;
}

.ttt-card .btn {
  display: flex;
  margin: 0 auto;
}

/* Gradient */
.gradient-preview {
  height: 140px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid var(--border);
}

.code-block {
  margin: 0;
  padding: 16px;
  font-size: 0.8rem;
  line-height: 1.5;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.35);
  color: #a5f3fc;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

[data-theme="light"] .code-block {
  background: rgba(22, 23, 29, 0.06);
  color: #0369a1;
}

/* Decide */
.input-area {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(99, 102, 241, 0.05);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  min-height: 120px;
}

.input-area::placeholder {
  color: var(--text-muted);
}

.input-area:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.decide-result {
  margin: 16px 0;
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
  min-height: 2em;
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Footer */
#site-footer-mount {
  flex-shrink: 0;
}

.site-footer {
  padding: 40px 20px 28px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .site-footer {
  background: rgba(15, 17, 23, 0.03);
}

.site-footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(200px, 1.35fr) repeat(3, minmax(120px, 1fr));
  gap: 28px 24px;
  text-align: left;
}

.site-footer-brand strong {
  display: block;
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.site-footer-brand p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.site-footer-col h4 {
  margin: 0 0 12px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.footer-link {
  display: block;
  padding: 5px 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--accent-2);
}

.site-footer-bottom {
  max-width: 960px;
  margin: 32px auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-meta {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 4px;
}

.footer-sep {
  opacity: 0.45;
  margin: 0 2px;
}

.footer-inline-link {
  color: var(--accent-2);
  font-weight: 600;
  text-decoration: none;
}

.footer-inline-link:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .site-footer-inner {
    grid-template-columns: 1fr 1fr;
    text-align: left;
  }

  .site-footer-brand {
    grid-column: 1 / -1;
    text-align: center;
  }

  .site-footer-bottom {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .site-footer-inner {
    grid-template-columns: 1fr;
  }
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
  z-index: 200;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive */
@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .nav-tabs {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .main {
    padding: 24px 16px 40px;
  }

  .card {
    padding: 20px;
  }
}