@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Sora:wght@400;500;600;700;800&display=swap');

:root {
  --ink: #0a0d13;
  --surface: #11151d;
  --raise: #171c26;
  --line: #29323f;
  --paper: #edf2f8;
  --mute: #94a1b0;
  --amber: #ffb340;
  --amber-ink: #201203;
  --teal: #36e0c4;
  --teal-ink: #04201b;
  --red: #ff6b6b;
  --green: #3ddc97;
  --glow-amber: rgba(255, 179, 64, 0.22);
  --glow-teal: rgba(54, 224, 196, 0.22);
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 8px 22px rgba(0, 0, 0, 0.32);
  --font-display: "Sora", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --font-body: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--glow-amber); color: var(--paper); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #3a4554; }

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ---- Header: console top ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
}
@supports (backdrop-filter: blur(8px)) {
  .site-header {
    background: rgba(10, 13, 19, 0.8);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
  }
}

.nav { display: flex; align-items: center; justify-content: space-between; height: 62px; }

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.brand:hover { text-decoration: none; color: var(--paper); }

.brand .logo {
  position: relative;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--amber), #ff8a3d);
  color: var(--amber-ink);
  font-size: 17px;
  box-shadow: 0 4px 14px var(--glow-amber);
}
.brand .logo::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 6px var(--teal);
  animation: led 2.2s ease-in-out infinite;
}

.nav-links { display: flex; gap: 4px; font-size: 0.9rem; }
.nav-links a {
  color: var(--mute);
  padding: 7px 12px;
  border-radius: 8px;
  transition: color 0.15s ease, background 0.15s ease;
}
.nav-links a:hover { color: var(--paper); background: var(--raise); text-decoration: none; }

/* ---- Hero: control room ---- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 60px 0 48px;
  text-align: center;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(60% 80% at 50% -10%, var(--glow-teal) 0%, transparent 70%),
    radial-gradient(40% 60% at 85% 12%, var(--glow-amber) 0%, transparent 70%),
    radial-gradient(40% 60% at 12% 8%, rgba(61, 220, 151, 0.07) 0%, transparent 70%),
    var(--ink);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.9rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  line-height: 1.18;
  font-weight: 800;
}

.hero p {
  color: var(--mute);
  font-size: 1.08rem;
  max-width: 660px;
  margin: 0 auto;
}

.hero .badges { margin-top: 20px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(23, 28, 38, 0.7);
  color: var(--mute);
}
.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--amber);
  box-shadow: 0 0 6px var(--amber);
}

/* ---- Sections ---- */
.section { padding: 48px 0; }
.section-title { font-family: var(--font-display); font-size: 1.45rem; margin: 0 0 8px; font-weight: 700; letter-spacing: -0.01em; }
.section-sub { color: var(--mute); margin: 0 0 26px; }

/* ---- Cards: rack modules ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
}

.card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--raise), var(--surface));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
  animation: rise 0.5s both;
}
.card:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3) { animation-delay: 0.1s; }
.card:nth-child(4) { animation-delay: 0.15s; }
.card:nth-child(5) { animation-delay: 0.2s; }
.card:nth-child(6) { animation-delay: 0.25s; }
.card:nth-child(7) { animation-delay: 0.3s; }

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 179, 64, 0.45);
  box-shadow: var(--shadow-soft);
}
.card:hover::before { opacity: 1; }

.card .icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--glow-amber);
  border: 1px solid rgba(255, 179, 64, 0.35);
  color: var(--amber);
  font-size: 1.4rem;
}

.card h3 { font-family: var(--font-display); margin: 0; font-size: 1.08rem; font-weight: 700; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--mute); font-size: 0.92rem; flex: 1; }

.card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--mute);
  padding-top: 4px;
}
.card .meta .stat { color: var(--amber); font-weight: 600; }

.card a.jump {
  display: inline-block;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--amber-ink);
  background: linear-gradient(135deg, var(--amber), #ff8a3d);
  box-shadow: 0 4px 12px var(--glow-amber);
  transition: filter 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}
.card a.jump:hover { filter: brightness(1.07); transform: translateY(-1px); text-decoration: none; box-shadow: 0 6px 16px var(--glow-amber); }

/* ---- Game pages ---- */
.page { padding: 30px 0 60px; }

.crumbs { font-family: var(--font-mono); font-size: 0.75rem; color: var(--mute); margin-bottom: 16px; }
.crumbs a { color: var(--mute); }
.crumbs a:hover { color: var(--amber); }

.game-head { margin-bottom: 22px; }
.game-head h1 { font-family: var(--font-display); margin: 0 0 6px; font-size: 1.85rem; font-weight: 800; letter-spacing: -0.02em; }
.game-head .kicker {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--amber);
  margin: 0 0 6px;
}
.game-head .game-desc { color: var(--mute); margin: 0; max-width: 720px; }

/* ---- Scorebar: meter bridge ---- */
.scorebar {
  display: flex;
  gap: 24px;
  margin: 0 0 18px;
  padding: 13px 18px;
  background: linear-gradient(180deg, #0d1118, var(--surface));
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 0.92rem;
  flex-wrap: wrap;
}
.scorebar span { color: var(--mute); }
.scorebar b { font-family: var(--font-mono); font-weight: 600; color: var(--paper); }
.scorebar .sb-score b { color: var(--amber); font-size: 1.1rem; text-shadow: 0 0 12px var(--glow-amber); }

.game-stage {
  background: linear-gradient(180deg, var(--raise), var(--surface));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  min-height: 240px;
}

.instructions {
  background: rgba(17, 21, 29, 0.7);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.92rem;
  color: var(--mute);
}

.prompt { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; margin: 18px 0 14px; }

/* ---- Buttons: lit switches ---- */
.btn {
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  transition: transform 0.1s ease, filter 0.15s ease, box-shadow 0.15s ease;
}
.btn:active { transform: scale(0.97); }

.btn-play {
  background: linear-gradient(135deg, var(--teal), #1fb8a2);
  color: var(--teal-ink);
  font-size: 1.05rem;
  padding: 14px 26px;
  box-shadow: 0 8px 22px var(--glow-teal);
}
.btn-play:hover { filter: brightness(1.07); box-shadow: 0 10px 28px var(--glow-teal); }

.btn-submit {
  background: linear-gradient(135deg, var(--amber), #ff8a3d);
  color: var(--amber-ink);
  margin-top: 14px;
  box-shadow: 0 6px 16px var(--glow-amber);
}
.btn-submit:hover { filter: brightness(1.07); }

.btn-next { background: var(--teal); color: var(--teal-ink); margin-left: 8px; }
.btn-next:hover { filter: brightness(1.06); }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Chips: rack buttons ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
  gap: 10px;
  margin: 14px 0;
}

.chip {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--paper);
  border-radius: var(--radius-sm);
  padding: 12px 10px;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(237, 242, 248, 0.04);
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}
.chip:hover:not(:disabled) {
  border-color: var(--amber);
  background: var(--raise);
  transform: translateY(-2px);
  box-shadow: 0 6px 14px var(--glow-amber);
}
.chip:active:not(:disabled) { transform: translateY(0); }
.chip.right { border-color: var(--green); background: rgba(61, 220, 151, 0.1); color: var(--green); animation: pop 0.3s ease; }
.chip.wrong { border-color: var(--red); background: rgba(255, 107, 107, 0.1); color: var(--red); animation: shake 0.3s ease; }
.chip.dim { opacity: 0.45; }

/* ---- Feedback ---- */
.feedback {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  border: 1px solid var(--line);
  border-left-width: 3px;
}
.feedback.ok { background: rgba(61, 220, 151, 0.08); border-color: var(--green); }
.feedback.err { background: rgba(255, 107, 107, 0.08); border-color: var(--red); }

/* ---- Comp Match A/B ---- */
.ab { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 10px 0; }
.ab-col { display: flex; flex-direction: column; gap: 12px; align-items: stretch; }

/* ---- Sliders (pan / delay) ---- */
.pan-wrap { margin: 20px 0 6px; }
.pan-slider { width: 100%; }
.pan-labels { display: flex; justify-content: space-between; color: var(--mute); font-size: 0.8rem; margin-top: 4px; }
.pan-readout {
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--amber);
  text-shadow: 0 0 10px var(--glow-amber);
  margin: 10px 0 0;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--teal), var(--line), var(--amber));
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--amber);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(255, 179, 64, 0.4);
}
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--amber);
  cursor: pointer;
}

/* ---- Balance Memory ---- */
.candidate {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.12s ease, box-shadow 0.15s ease;
}
.candidate:hover { border-color: var(--teal); transform: translateY(-2px); }
.candidate.selected { border-color: var(--amber); box-shadow: 0 0 0 2px var(--glow-amber); }
.candidate.dim { opacity: 0.55; }
.candidate.right { border-color: var(--green); background: rgba(61, 220, 151, 0.1); }
.candidate .cand-label { font-family: var(--font-display); font-weight: 700; }
.candidate small { color: var(--mute); }

.candidates { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin: 16px 0; }

.play-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 10px 0; }

/* ---- SEO / ad / related ---- */
.seo-content {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  color: var(--mute);
  font-size: 0.95rem;
  max-width: 780px;
}
.seo-content h2 { font-family: var(--font-display); color: var(--paper); font-size: 1.15rem; font-weight: 700; }

.ad-slot {
  margin: 36px 0;
  min-height: 120px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: var(--mute);
  font-size: 0.85rem;
  background: var(--surface);
}

.related { margin-top: 34px; }
.related h3 { font-family: var(--font-display); font-size: 1rem; color: var(--paper); font-weight: 700; }
.related ul { list-style: none; padding: 0; display: flex; gap: 10px; flex-wrap: wrap; }
.related li a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border: 1px solid var(--line);
  padding: 7px 14px;
  border-radius: 999px;
  color: var(--mute);
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.related li a:hover { color: var(--amber); border-color: var(--amber); background: var(--raise); text-decoration: none; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--mute);
  font-size: 0.85rem;
}
.site-footer .foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.site-footer .credit { flex-basis: 100%; text-align: center; color: var(--mute); font-size: 0.85rem; }
.site-footer .credit strong { color: var(--amber); }
.site-footer a { color: var(--mute); }
.site-footer a:hover { color: var(--paper); }

/* ---- Motion ---- */
@keyframes led {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

@media (max-width: 640px) {
  .ab { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .game-stage { padding: 18px; }
  .hero { padding: 42px 0 36px; }
  .scorebar { gap: 12px; font-size: 0.85rem; }
}