:root {
  color-scheme: dark;
  --bg: #07111f;
  --panel: #0e1d30;
  --panel-2: #12253d;
  --line: rgba(179, 211, 255, 0.16);
  --text: #f5f8ff;
  --muted: #9fb1c9;
  --cyan: #35d6e8;
  --yellow: #ffd166;
  --blue: #2f80ed;
  --violet: #9b5de5;
  --green: #3ddc97;
  --coral: #ff6b6b;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% 0%, rgba(53, 214, 232, 0.13), transparent 32rem),
    radial-gradient(circle at 85% 32rem, rgba(155, 93, 229, 0.12), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

button, a { font: inherit; }
button { color: inherit; }
a { color: inherit; }
.topbar {
  width: min(1180px, calc(100% - 32px));
  min-height: 74px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 900; letter-spacing: .13em; }
.brand-mark { display: grid; place-items: center; width: 34px; aspect-ratio: 1; border-radius: 10px; color: #04121b; background: linear-gradient(135deg, var(--yellow), var(--cyan)); transform: rotate(-6deg); box-shadow: 0 8px 25px rgba(53, 214, 232, .2); }
.site-nav, .footer-nav { display: flex; align-items: center; gap: 18px; }
.site-nav a, .footer-nav a { color: var(--muted); font-size: .9rem; font-weight: 750; text-decoration: none; }
.site-nav a:hover, .footer-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); }
.top-actions { display: flex; gap: 10px; align-items: center; }
.button, .icon-button { min-height: 44px; border-radius: 13px; border: 1px solid var(--line); cursor: pointer; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.button:hover, .icon-button:hover { transform: translateY(-1px); border-color: rgba(255,255,255,.35); }
.button:focus-visible, .icon-button:focus-visible, .tile:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }
.button { padding: 10px 17px; font-weight: 750; }
.button-ghost, .icon-button { background: rgba(255,255,255,.04); }
.icon-button { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; }
.button-primary { border: 0; color: #06111d; background: linear-gradient(135deg, var(--yellow), #ff9f43); }
.button-secondary { width: 100%; background: var(--panel-2); }

main { width: min(1180px, calc(100% - 32px)); margin-inline: auto; }
.play-section { padding: clamp(32px, 6vw, 72px) 0 80px; }
.play-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 24px; }
.eyebrow { margin: 0 0 5px; color: var(--cyan); font-size: .78rem; line-height: 1.3; letter-spacing: .17em; font-weight: 900; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(2.2rem, 6vw, 4.8rem); line-height: .98; letter-spacing: -.055em; }
h2 { margin: 0; font-size: clamp(1.55rem, 3vw, 2.4rem); line-height: 1.08; letter-spacing: -.035em; }
.quick-rule { max-width: 390px; margin: 0 0 5px; color: var(--muted); text-align: right; }
.game-layout { width: min(100%, 820px); margin-inline: auto; }
.game-stage { padding: clamp(12px, 2.5vw, 24px); border: 1px solid var(--line); border-radius: 26px; background: linear-gradient(145deg, rgba(18,37,61,.94), rgba(9,23,39,.96)); box-shadow: var(--shadow); }
.game-hud { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) clamp(78px, 13vw, 104px); gap: 10px; margin-bottom: 14px; padding: 16px 12px 12px; border: 1px solid rgba(53,214,232,.24); border-radius: 18px; background: linear-gradient(145deg, rgba(28,55,82,.98), rgba(12,28,48,.98)); box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 12px 26px rgba(0,0,0,.24); }
.hud-level { position: absolute; top: -9px; left: 16px; z-index: 1; display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border: 1px solid rgba(53,214,232,.42); border-radius: 99px; background: #0a1b2d; color: var(--cyan); box-shadow: 0 4px 10px rgba(0,0,0,.26); }
.hud-level span { font-size: .69rem; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.hud-level strong { color: var(--text); font-variant-numeric: tabular-nums; }
.hud-main { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; min-width: 0; }
.hud-stat { position: relative; display: grid; grid-template-columns: 38px minmax(0, 1fr); align-items: center; gap: 8px; min-width: 0; padding: 9px 10px 12px; border-radius: 13px; background: rgba(255,255,255,.05); }
.hud-stat-copy { min-width: 0; }
.hud-label { display: block; overflow: hidden; color: var(--muted); font-size: .7rem; font-weight: 800; letter-spacing: .04em; line-height: 1.2; text-overflow: ellipsis; text-transform: uppercase; }
.hud-stat strong { display: block; overflow: hidden; margin-top: 1px; font-size: clamp(1rem, 2.8vw, 1.35rem); line-height: 1.05; font-variant-numeric: tabular-nums; text-overflow: ellipsis; }
.hud-symbol { display: grid; place-items: center; width: 38px; aspect-ratio: 1; color: var(--yellow); font-size: 1.55rem; filter: drop-shadow(0 3px 8px rgba(255,209,102,.3)); }
.hud-side { display: grid; grid-template-rows: minmax(0, 1fr) auto; gap: 6px; }
.hud-moves { display: grid; place-content: center; min-height: 66px; border: 2px solid var(--yellow); border-radius: 14px; background: linear-gradient(145deg, #fff4c8, #ffc857); color: #401c04; text-align: center; box-shadow: inset 0 2px 0 rgba(255,255,255,.72), 0 7px 16px rgba(255,177,48,.16); }
.hud-moves span { font-size: .67rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.hud-moves strong { margin-top: -3px; font-size: clamp(1.8rem, 5vw, 2.65rem); line-height: 1; font-variant-numeric: tabular-nums; }
.hud-reset { min-height: 32px; border: 1px solid var(--line); border-radius: 9px; background: rgba(255,255,255,.05); color: var(--text); font-size: .73rem; font-weight: 800; cursor: pointer; }
.hud-reset:hover { border-color: var(--cyan); background: rgba(53,214,232,.09); }
.hud-reset:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }
.board-wrap { position: relative; width: min(100%, 660px); margin-inline: auto; }
.board { display: grid; grid-template-columns: repeat(8, 1fr); gap: clamp(4px, .9vw, 9px); width: 100%; aspect-ratio: 1; padding: clamp(7px, 1.4vw, 13px); border-radius: 20px; background: #06101d; border: 1px solid rgba(255,255,255,.08); box-shadow: inset 0 0 45px rgba(0,0,0,.45); }
.tile { position: relative; min-width: 0; border: 0; border-radius: clamp(7px, 1.2vw, 14px); cursor: pointer; transform: translateZ(0); box-shadow: inset 0 2px 0 rgba(255,255,255,.24), inset 0 -5px 10px rgba(0,0,0,.24), 0 4px 8px rgba(0,0,0,.25); transition: transform .12s ease, filter .12s ease, opacity .18s ease; }
.tile::after { content: ""; position: absolute; inset: 14% 22% auto; height: 17%; border-radius: 999px; background: rgba(255,255,255,.25); filter: blur(1px); }
.tile:hover { transform: scale(1.06); filter: brightness(1.1); z-index: 1; }
.tile.removing { transform: scale(.2) rotate(18deg); opacity: 0; }
.tile-blue { background: linear-gradient(145deg, #48b8ff, var(--blue)); }
.tile-violet { background: linear-gradient(145deg, #c084fc, var(--violet)); }
.tile-green { background: linear-gradient(145deg, #62efb3, #17a873); }
.tile-coral { background: linear-gradient(145deg, #ff9b85, var(--coral)); }
.tile-yellow { background: linear-gradient(145deg, #ffe58c, #f4a62a); }
.game-message { min-height: 24px; margin: 13px 4px 0; color: var(--muted); text-align: center; }
.game-overlay { position: absolute; inset: 0; z-index: 3; padding: 24px; border-radius: 20px; background: rgba(4, 13, 25, .9); backdrop-filter: blur(12px); display: grid; place-content: center; justify-items: center; text-align: center; }
.game-overlay[hidden] { display: none; }
.overlay-kicker { margin: 0 0 7px; color: var(--cyan); font-weight: 900; text-transform: uppercase; letter-spacing: .14em; font-size: .78rem; }
.game-overlay h2 { margin-bottom: 10px; }
.game-overlay p:not(.overlay-kicker) { max-width: 360px; margin: 0 0 22px; color: var(--muted); }
.mini-tile { width: 38px; aspect-ratio: 1; border-radius: 10px; box-shadow: inset 0 2px 0 rgba(255,255,255,.25), inset 0 -4px 7px rgba(0,0,0,.25); }
.progress { position: absolute; right: 9px; bottom: 6px; left: 9px; height: 4px; overflow: hidden; border-radius: 99px; background: rgba(255,255,255,.09); }
.progress span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--yellow)); transition: width .3s ease; }

.how-to { padding: 72px 0 86px; border-top: 1px solid var(--line); }
.how-to > h2 { max-width: 650px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 30px; }
.steps article { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); }
.steps article > span { color: var(--cyan); font-size: .8rem; font-weight: 900; letter-spacing: .14em; }
.steps h3 { margin: 20px 0 6px; font-size: 1.15rem; }
.steps p { margin: 0; color: var(--muted); }
.section-actions { margin-top: 24px; }
.text-link { color: var(--cyan); font-weight: 800; text-decoration: none; }
.text-link:hover { color: var(--yellow); }
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding: 0 0 76px; }
.strategy-card, .faq-card { padding: clamp(22px, 4vw, 38px); border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg, rgba(18,37,61,.72), rgba(9,23,39,.78)); }
.strategy-card > p:not(.eyebrow), .strategy-card li, .faq-card details p { color: var(--muted); }
.strategy-card ul { margin: 24px 0 0; padding-left: 1.2rem; }
.strategy-card li + li { margin-top: 10px; }
.faq-card h2, .strategy-card h2 { margin-bottom: 18px; }
.faq-card details { padding: 15px 0; border-top: 1px solid var(--line); }
.faq-card summary { cursor: pointer; font-weight: 750; }
.faq-card details p { margin: 10px 0 0; }
.lotto-note { display: grid; grid-template-columns: 1fr 1.2fr auto; gap: 24px; align-items: center; margin-bottom: 80px; padding: clamp(22px, 4vw, 34px); border: 1px solid rgba(255,209,102,.28); border-radius: 22px; background: rgba(255,209,102,.055); }
.lotto-note p { margin: 0; color: var(--muted); }
.lotto-note .button { width: auto; text-decoration: none; white-space: nowrap; }
.cluster-section { padding: 0 0 76px; }
.cluster-section > h2 { max-width: 720px; }
.cluster-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 28px; }
.cluster-card { min-width: 0; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); text-decoration: none; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.cluster-card:hover { transform: translateY(-3px); border-color: rgba(53,214,232,.42); background: rgba(53,214,232,.055); }
.cluster-card > span { color: var(--cyan); font-size: .76rem; font-weight: 900; letter-spacing: .14em; }
.cluster-card h3 { margin: 16px 0 7px; font-size: 1.08rem; }
.cluster-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.guide-page { width: min(920px, calc(100% - 32px)); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 7px; padding-top: 24px; color: var(--muted); font-size: .86rem; }
.breadcrumbs a { color: var(--cyan); text-decoration: none; }
.guide-hero { padding: clamp(42px, 8vw, 88px) 0 46px; border-bottom: 1px solid var(--line); }
.guide-hero h1 { max-width: 830px; }
.guide-lead { max-width: 730px; margin: 22px 0 0; color: var(--muted); font-size: clamp(1.02rem, 2vw, 1.18rem); }
.guide-cta { display: inline-flex; margin-top: 24px; text-decoration: none; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 240px; gap: 34px; padding: 48px 0 76px; align-items: start; }
.article-body section + section { margin-top: 48px; padding-top: 44px; border-top: 1px solid var(--line); }
.article-body h2 { margin-bottom: 17px; font-size: clamp(1.55rem, 3vw, 2.1rem); }
.article-body h3 { margin: 27px 0 8px; font-size: 1.13rem; }
.article-body p, .article-body li { color: var(--muted); }
.article-body ul, .article-body ol { padding-left: 1.25rem; }
.article-body li + li { margin-top: 8px; }
.answer-box, .example-box, .level-card { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: linear-gradient(145deg, rgba(18,37,61,.72), rgba(9,23,39,.78)); }
.answer-box { margin-bottom: 34px; border-color: rgba(53,214,232,.28); }
.answer-box strong { color: var(--text); }
.example-box { margin: 24px 0; }
.example-box p:last-child { margin-bottom: 0; }
.article-aside { position: sticky; top: 22px; padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); }
.article-aside h2 { font-size: 1rem; letter-spacing: 0; }
.article-aside nav { display: grid; gap: 7px; margin-top: 15px; }
.article-aside a { padding: 9px 10px; border-radius: 9px; color: var(--muted); font-size: .9rem; text-decoration: none; }
.article-aside a:hover, .article-aside a[aria-current="page"] { background: rgba(53,214,232,.08); color: var(--text); }
.facts-table { width: 100%; margin: 22px 0; border-collapse: collapse; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.facts-table th, .facts-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; }
.facts-table th { background: rgba(53,214,232,.07); color: var(--text); }
.facts-table td { color: var(--muted); }
.facts-table tr:last-child td { border-bottom: 0; }
.level-stack { display: grid; gap: 14px; margin-top: 24px; }
.level-card { display: grid; grid-template-columns: 70px 1fr; gap: 18px; }
.level-number { display: grid; place-items: center; width: 64px; aspect-ratio: 1; border-radius: 16px; background: linear-gradient(135deg, var(--yellow), #ff9f43); color: #301500; font-size: 1.8rem; font-weight: 900; }
.level-card h3 { margin-top: 0; }
.tile-guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 24px; }
.tile-guide { display: grid; grid-template-columns: 48px 1fr; gap: 14px; align-items: center; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.025); }
.tile-guide .mini-tile { width: 48px; }
.tile-guide h3 { margin: 0 0 3px; }
.tile-guide p { margin: 0; font-size: .92rem; }
.related-guides { padding: 42px 0 76px; border-top: 1px solid var(--line); }
.related-guides .cluster-grid { grid-template-columns: repeat(3, 1fr); }
footer { width: min(1180px, calc(100% - 32px)); margin-inline: auto; padding: 25px 0 38px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 18px; color: var(--muted); }
footer p { margin: 0; }
footer a { color: var(--text); font-weight: 700; }

@media (max-width: 860px) {
  .game-hud { position: sticky; top: 8px; z-index: 5; }
  .site-nav { display: none; }
  .cluster-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-aside { position: static; order: -1; }
  .article-aside nav { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .topbar { min-height: 64px; }
  .button-ghost, #soundLabel { display: none; }
  .icon-button { width: 44px; justify-content: center; padding: 0; }
  main, .topbar, footer { width: min(100% - 20px, 1180px); }
  .guide-page { width: min(100% - 20px, 920px); }
  .play-section { padding-top: 28px; }
  .play-heading { align-items: start; flex-direction: column; gap: 12px; }
  .quick-rule { text-align: left; }
  .game-stage { border-radius: 18px; }
  .game-hud { grid-template-columns: minmax(0, 1fr) 72px; gap: 7px; margin-bottom: 10px; padding: 15px 7px 7px; border-radius: 14px; }
  .hud-level { left: 10px; }
  .hud-main { gap: 5px; }
  .hud-stat { grid-template-columns: 30px minmax(0, 1fr); gap: 5px; padding: 7px 6px 10px; border-radius: 10px; }
  .mini-tile, .hud-symbol { width: 30px; border-radius: 8px; }
  .hud-symbol { font-size: 1.2rem; }
  .hud-label { font-size: .62rem; }
  .hud-stat strong { font-size: clamp(.9rem, 4vw, 1.12rem); }
  .hud-moves { min-height: 56px; border-radius: 11px; }
  .hud-moves strong { font-size: 1.85rem; }
  .board { border-radius: 14px; }
  .steps { grid-template-columns: 1fr; }
  .guide-grid { grid-template-columns: 1fr; }
  .cluster-grid { grid-template-columns: 1fr; }
  .article-layout { padding-top: 34px; }
  .article-aside nav { grid-template-columns: 1fr; }
  .facts-table { display: block; overflow-x: auto; }
  .level-card { grid-template-columns: 54px 1fr; padding: 17px; gap: 12px; }
  .level-number { width: 50px; border-radius: 13px; font-size: 1.4rem; }
  .tile-guide-grid, .related-guides .cluster-grid { grid-template-columns: 1fr; }
  .lotto-note { grid-template-columns: 1fr; }
  .lotto-note .button { width: 100%; text-align: center; white-space: normal; }
  footer { flex-direction: column; }
  .footer-nav { flex-wrap: wrap; gap: 10px 16px; }
}
@media (max-width: 380px) {
  .game-hud { grid-template-columns: minmax(0, 1fr) 66px; }
  .hud-stat { grid-template-columns: 1fr; justify-items: center; gap: 2px; }
  .hud-label { display: none; }
  .hud-stat-copy { text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}