/* site/styles.css */
/* =======================
   語鎖クエスト 公式HP（静的LP）
   - 画像なしでも破綻しない
   - モバイル最優先
   ======================= */

:root {
  --bg: #0b0f16;
  --bg2: #0f1623;
  --card: #111a2a;
  --text: #eaf0ff;
  --muted: #aab6d6;
  --line: rgba(255, 255, 255, .10);

  --accent: #7dd3fc;
  --accent2: #a78bfa;

  --radius: 18px;
  --shadow: 0 16px 40px rgba(0, 0, 0, .35);

  --maxw: 1100px;
  --pad: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Meiryo", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 800px at 20% -10%, rgba(167, 139, 250, .18), transparent 60%),
    radial-gradient(1000px 700px at 80% 0%, rgba(125, 211, 252, .12), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg2));
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.muted {
  color: var(--muted);
}

.dot {
  color: var(--muted);
  padding: 0 8px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(11, 15, 22, .70);
  border-bottom: 1px solid var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand__mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(125, 211, 252, .35), rgba(167, 139, 250, .35));
  border: 1px solid var(--line);
}

.nav {
  display: none;
  gap: 18px;
  font-size: 14px;
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
}

.nav__toggle {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .03);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
}

.nav__drawer {
  border-top: 1px solid var(--line);
  padding: 10px var(--pad) 16px;
  display: grid;
  gap: 10px;
  background: rgba(11, 15, 22, .88);
}

.nav__drawer a {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--muted);
}

.nav__drawer a:hover {
  color: var(--text);
}

.hero {
  padding: 54px 0 26px;
}

.hero__inner {
  display: grid;
  gap: 22px;
}

.eyebrow {
  color: var(--muted);
  letter-spacing: .08em;
  font-size: 12px;
  margin: 0 0 10px;
}

.hero__title {
  margin: 0 0 10px;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.15;
}

.hero__subtitle {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 14px 0 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: transform .08s ease, background .12s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(135deg, rgba(125, 211, 252, .30), rgba(167, 139, 250, .25));
}

.btn--secondary {
  background: rgba(255, 255, 255, .04);
}

.subcta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}

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

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

.hero__copy,
.hero__visual {
  min-width: 0;
}

.hero__visual {
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .03);
  box-shadow: var(--shadow);
  /* 幅制限はメディアクエリ側で max-width 制御する形に変更 */
  width: 100%;
}

.hero__img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--radius) - 6px);
  display: block;
}

.ph {
  border-radius: calc(var(--radius) - 6px);
  border: 1px dashed rgba(255, 255, 255, .20);
  background:
    linear-gradient(135deg, rgba(125, 211, 252, .10), rgba(167, 139, 250, .10)),
    rgba(255, 255, 255, .03);
}

.ph--hero {
  aspect-ratio: 16/10;
  width: 100%;
}

.ph--shot {
  aspect-ratio: 9/16;
  min-width: 180px;
}

.ph--embed {
  aspect-ratio: 16/9;
  width: 100%;
}

.ph__hint {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.section {
  padding: 46px 0;
}

.section--alt {
  background: rgba(255, 255, 255, .02);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section__title {
  margin: 0 0 12px;
  font-size: 22px;
}

.section__lead {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.9;
}

.bullets {
  display: grid;
  gap: 12px;
}

.bullet {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .03);
  padding: 14px;
}

.bullet h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.bullet p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.grid {
  display: grid;
  gap: 12px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .03);
  padding: 16px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.gallery {
  display: flex;
  gap: 12px;
  overflow: auto;
  padding-bottom: 6px;
}

.gallery::-webkit-scrollbar {
  height: 8px;
}

.gallery::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, .12);
  border-radius: 999px;
}

.gallery__img {
  height: 480px;
  width: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.music {
  display: grid;
  gap: 12px;
}

.list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.9;
}

.list a {
  color: var(--accent);
}

.devlog {
  display: grid;
  gap: 12px;
}

.faq {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .03);
  padding: 12px 14px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.faq p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.9;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
  background: rgba(0, 0, 0, .10);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.footer__social {
  margin-top: 8px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Desktop */
@media (min-width: 900px) {
  .nav {
    display: flex;
  }

  .nav__toggle {
    display: none;
  }

  .nav__drawer {
    display: none !important;
  }

  .hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
    gap: clamp(24px, 4vw, 56px);
  }

  .hero__visual {
    justify-self: end;
    max-width: 720px;
    width: 100%;
  }

  .bullets {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .music {
    grid-template-columns: 1fr 1fr;
  }

  .devlog {
    grid-template-columns: auto 1fr;
    align-items: start;
  }

  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}