/* 叠魂 StackedSouls — stackedsouls.nyxnet.cc
   Dark tarot, from docs/art/website (approved mockups). Colours as docs/ART.md. */
:root {
  --bg: #0e0a17; --panel: #1a1328; --raised: #261b3a; --plum: #4a2a6b;
  --gold: #c9a45c; --gold-hi: #f2d58a; --text: #f1e8d6; --muted: #a99a82;
  --ember: #ff6a3d; --tide: #3fa2ff; --shade: #9a6bff; --radiance: #ffc93f;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --wrap: 1180px;
}
.lang-ja { --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, sans-serif; }
.lang-en { --serif: "Cormorant Garamond", "Georgia", "Times New Roman", serif;
  --sans: "Inter", "Helvetica Neue", "Segoe UI", Arial, sans-serif; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.75 var(--sans);
  -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold-hi); text-decoration: none; }
a:hover { color: #fff3c9; }
.wrap { width: min(var(--wrap), 100% - 40px); margin: 0 auto; }
.serif, h1, h2, h3 { font-family: var(--serif); font-weight: 700; letter-spacing: .04em; }

/* ── header ─────────────────────────── */
.top { position: sticky; top: 0; z-index: 20; background: rgba(14, 10, 23, .82);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(201, 164, 92, .45); }
.bar { width: min(var(--wrap), 100% - 32px); margin: 0 auto; height: 68px;
  display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; color: var(--gold-hi);
  font-family: var(--serif); font-size: 20px; letter-spacing: .12em; }
.brand img { width: 44px; height: 44px; }
.menu { display: flex; align-items: center; gap: 28px; }
.pages { display: flex; gap: 26px; font-family: var(--serif); font-size: 16px; letter-spacing: .1em; }
.pages a { color: var(--text); }
.pages a:hover, .pages a.on { color: var(--gold-hi); }
.langs { display: flex; gap: 6px; padding-left: 24px; border-left: 1px solid rgba(201, 164, 92, .55);
  font-family: var(--serif); }
.langs a { color: var(--muted); padding: 2px 6px; }
.langs a.on { color: var(--gold-hi); }
.menu-toggle, .menu-button { display: none; }

/* ── hero ───────────────────────────── */
.hero { position: relative; overflow: hidden; min-height: min(92vh, 980px);
  background: #0b0813 url(/assets/hero_bg.webp) center top / cover no-repeat; text-align: center; }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 220px;
  background: linear-gradient(transparent, var(--bg)); pointer-events: none; }
.hero-card { position: absolute; top: 120px; width: min(30vw, 400px); pointer-events: none;
  filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .55)); animation: float 7s ease-in-out infinite; }
.hero-card.left { left: max(-40px, 50% - 780px); }
.hero-card.right { right: max(-40px, 50% - 780px); animation-delay: -3.5s; }
@keyframes float { 50% { transform: translateY(-14px); } }
.hero-inner { position: relative; z-index: 2; padding: 64px 20px 0; display: flex; flex-direction: column; align-items: center; }
.hero .logo { width: min(520px, 80vw); filter: drop-shadow(0 10px 30px rgba(0, 0, 0, .7)); }
.tagline { margin: 18px 0 26px; font-family: var(--serif); font-size: clamp(20px, 2.6vw, 32px);
  letter-spacing: .14em; color: #fbefd2; text-shadow: 0 2px 12px rgba(0, 0, 0, .8); }
.stores { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; align-items: center; }
.badge img { height: 54px; width: auto; }
.badge.soon { opacity: .55; pointer-events: none; }
.soon-note { width: 100%; margin: 6px 0 0; color: var(--muted); font-size: 14px; letter-spacing: .1em; }
/* phone_frame.png is 1430×680 with the screen at (76, 40, 1300×600) */
.phone { position: relative; width: min(900px, 94vw); margin: 40px auto 0; aspect-ratio: 1430 / 680;
  filter: drop-shadow(0 40px 60px rgba(0, 0, 0, .7)) drop-shadow(0 0 40px rgba(154, 107, 255, .2)); }
.phone img { position: absolute; left: 5.315%; top: 5.882%; width: 90.91%; height: 88.235%;
  object-fit: cover; border-radius: 2.9% / 6.3%; }
.phone::after { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: url(/assets/phone_frame.png) center / 100% 100% no-repeat; }

/* ── sections ───────────────────────── */
.band { position: relative; padding: 90px 0; background: url(/assets/section_bg.webp) center / cover no-repeat; }
.band.plain { background: none; }
.rule { display: flex; align-items: center; justify-content: center; gap: 22px; margin: 0 0 46px;
  font-size: clamp(28px, 3.6vw, 46px); color: var(--gold-hi); text-align: center; }
.rule::before, .rule::after { content: ""; flex: 0 1 220px; height: 24px;
  background: url(/assets/divider_short.png) center / contain no-repeat; }
.rule::after { transform: scaleX(-1); }

.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.feature { text-align: center; }
.feature .card { position: relative; aspect-ratio: 2 / 3; border-radius: 10px; overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, .5); }
.feature .card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.feature .card img.frame { object-fit: fill; }
/* the frame's empty ring sits at 94.7% of its height (as in the game's SSSoulView) */
.feature .card img.sigil { inset: auto; left: 50%; top: 94.7%; width: 11%; height: auto; transform: translate(-50%, -50%); }
.feature h3 { margin: 18px 0 4px; font-size: 30px; color: var(--gold-hi); }
.feature p { margin: 0; color: #e8dcc2; font-family: var(--serif); letter-spacing: .06em; }

.elements { display: flex; justify-content: center; gap: clamp(20px, 5vw, 70px); margin-top: 70px;
  padding-top: 40px; border-top: 1px solid rgba(201, 164, 92, .35); }
.element { text-align: center; max-width: 180px; }
.element img { width: 148px; margin: 0 auto 8px; }
.element b { display: block; font-family: var(--serif); font-size: 28px; }
.element span { color: var(--muted); font-size: 14px; }
.ember b { color: var(--ember); } .tide b { color: var(--tide); }
.shade b { color: #b896ff; } .radiance b { color: var(--radiance); }

.duel { display: grid; grid-template-columns: 1.25fr 1fr; gap: 50px; align-items: center; }
.duel h2 { margin: 0 0 10px; font-size: clamp(34px, 4.4vw, 58px); color: var(--gold-hi); text-align: left; }
.facts { display: flex; flex-wrap: wrap; gap: 6px 22px; margin: 0 0 18px; padding: 12px 0;
  border-top: 1px solid rgba(201, 164, 92, .45); border-bottom: 1px solid rgba(201, 164, 92, .45);
  font-family: var(--serif); font-size: 21px; color: #fbefd2; }
.facts span + span::before { content: "✦"; color: var(--gold); margin-right: 22px; }
.duel .phone { margin: 24px 0 0; width: 100%; }
.cta { text-align: center; }
.cta .logo { width: min(400px, 70vw); margin: 0 auto 26px; }
.cta .langs-note { margin-top: 18px; color: #e8dcc2; font-family: var(--serif); letter-spacing: .08em; }

/* ── footer ─────────────────────────── */
footer { border-top: 1px solid rgba(201, 164, 92, .5); padding: 36px 0 44px; background: #0b0812; }
footer .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 40px; }
.foot-brand img { width: 150px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 26px; margin-left: auto; font-family: var(--serif); }
.foot-links a { color: var(--text); }
.copy { width: 100%; margin: 0; color: var(--muted); font-size: 14px; }

/* ── document pages ─────────────────── */
.doc-page { background: url(/assets/section_bg.webp) center / cover fixed; }
.doc { display: grid; grid-template-columns: 220px 1fr; gap: 50px; padding: 70px 0 90px; }
.toc { position: sticky; top: 110px; align-self: start; display: flex; flex-direction: column; gap: 12px;
  font-family: var(--serif); font-size: 19px; padding-left: 18px; border-left: 1px solid rgba(201, 164, 92, .4); }
.toc a { color: var(--text); }
.toc a.on { color: var(--gold-hi); box-shadow: -19px 0 0 -16px var(--gold-hi); }
.paper { background: rgba(20, 14, 32, .9); border: 22px solid transparent;
  border-image: url(/assets/doc_frame.png) 64 / 22px / 0 stretch; padding: 34px clamp(18px, 4vw, 54px) 48px; }
.paper h1 { margin: 0 0 6px; font-size: clamp(34px, 4vw, 52px); color: #fbefd2; }
.paper .date { margin: 0 0 26px; padding-bottom: 18px; color: var(--muted);
  border-bottom: 1px solid rgba(201, 164, 92, .5); }
.paper h2 { margin: 38px 0 10px; font-size: 24px; color: var(--gold-hi); }
.paper h3 { margin: 26px 0 6px; font-size: 19px; color: #fbefd2; }
.paper p, .paper li { color: #ece2cc; }
.paper ul, .paper ol { padding-left: 1.3em; }
.paper li { margin: 4px 0; }
.paper table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; }
.paper th, .paper td { text-align: left; vertical-align: top; padding: 10px 12px;
  border-bottom: 1px solid rgba(201, 164, 92, .3); }
.paper th { color: var(--gold-hi); font-family: var(--serif); white-space: nowrap; }
.paper .summary { background: rgba(74, 42, 107, .35); border-left: 3px solid var(--gold); padding: 6px 20px; }
.paper b.ui { color: var(--gold-hi); font-weight: 600; }
.paper details { border-bottom: 1px solid rgba(201, 164, 92, .3); padding: 12px 0; }
.paper summary { cursor: pointer; font-family: var(--serif); font-size: 19px; color: #fbefd2; }
.paper .mail { font-size: 20px; }

/* ── language picker (/) ────────────── */
.pick { min-height: 100vh; display: grid; place-items: center; text-align: center;
  background: url(/assets/hero_bg.webp) center / cover; }
.pick img { width: min(420px, 80vw); margin: 0 auto 30px; }
.pick nav { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; font-family: var(--serif); font-size: 22px; }
.pick nav a { padding: 10px 26px; border: 1px solid var(--gold); border-radius: 6px; background: rgba(14, 10, 23, .7); }

/* ── phones ─────────────────────────── */
@media (max-width: 860px) {
  body { font-size: 16px; }
  .bar { height: 58px; }
  .menu-button { display: block; width: 44px; height: 44px; position: relative; cursor: pointer; }
  .menu-button span, .menu-button span::before, .menu-button span::after { position: absolute; left: 10px; width: 24px;
    height: 2px; background: var(--gold-hi); content: ""; }
  .menu-button span { top: 21px; } .menu-button span::before { top: -8px; left: 0; } .menu-button span::after { top: 8px; left: 0; }
  .menu { display: none; position: absolute; top: 58px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: rgba(14, 10, 23, .97); border-bottom: 1px solid rgba(201, 164, 92, .5); padding: 8px 20px 18px; }
  .menu-toggle:checked ~ .menu { display: flex; }
  .pages { flex-direction: column; gap: 0; width: 100%; }
  .pages a { padding: 12px 0; border-bottom: 1px solid rgba(201, 164, 92, .2); font-size: 18px; }
  .langs { border: 0; padding: 14px 0 0; gap: 12px; }
  .langs a { padding: 8px 12px; border: 1px solid rgba(201, 164, 92, .4); border-radius: 4px; }
  .hero { background-image: url(/assets/hero_bg_mobile.webp); min-height: 0; padding-bottom: 50px; }
  .hero-card { width: 36vw; top: 70px; opacity: .55; }
  .hero-card.left { left: -14vw; } .hero-card.right { right: -14vw; }
  .hero-inner { padding-top: 40px; }
  .band { padding: 60px 0; }
  .features { grid-template-columns: 1fr 1fr; gap: 18px; }
  .feature h3 { font-size: 22px; margin-top: 10px; letter-spacing: .02em; }
  .feature p { font-size: 14px; line-height: 1.6; letter-spacing: 0; }
  .lang-en .feature p br { display: none; }
  .rule { gap: 12px; font-size: 26px; }
  .rule::before, .rule::after { flex: 0 0 48px; }
  .tagline { letter-spacing: .04em; margin: 12px 0 20px; text-wrap: balance; }
  .badge img { height: 44px; }
  .soon-note { font-size: 13px; letter-spacing: .02em; }
  .hero::after { height: 80px; }
  .rule { margin-bottom: 30px; }
  .elements { flex-wrap: wrap; gap: 24px 30px; }
  .element { width: 40%; } .element img { width: 110px; }
  .duel { grid-template-columns: 1fr; gap: 30px; }
  .duel h2 { text-align: center; }
  .facts { justify-content: center; font-size: 18px; }
  .doc { grid-template-columns: 1fr; gap: 20px; padding: 30px 0 60px; }
  .toc { position: static; flex-direction: row; flex-wrap: wrap; border: 0; padding: 0; gap: 8px 20px; }
  .toc a.on { box-shadow: none; text-decoration: underline; }
  .paper { border-width: 14px; border-image-width: 14px; }
  .paper table, .paper tbody, .paper tr, .paper td { display: block; }
  .paper tr:first-child { display: none; }
  .paper tr { padding: 12px 0; border-bottom: 1px solid rgba(201, 164, 92, .3); }
  .paper td { border: 0; padding: 2px 0; }
  .paper td:first-child { color: var(--gold-hi); font-family: var(--serif); font-size: 17px; }
  .paper td:last-child { color: var(--muted); }
  .paper td:last-child::before { content: "→ "; color: var(--gold); }
  .foot-links { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) { .hero-card { animation: none; } html { scroll-behavior: auto; } }