:root {
  --bg-deep: oklch(8% 0.025 258);
  --fg: oklch(97% 0.008 80);
  --muted: oklch(72% 0.015 80);
  --dim: oklch(54% 0.02 80);
  --gold: oklch(83% 0.09 92);
  --gold-d: oklch(63% 0.09 80);
  --gold-grad: linear-gradient(170deg, oklch(89% 0.07 95) 0%, oklch(78% 0.1 88) 45%, oklch(62% 0.1 78) 100%);
  --hairline: oklch(55% 0.04 250 / 0.22);
  --surface: oklch(15% 0.03 258 / 0.72);
  --font-en: "Cinzel", "Inter", serif;
  --font-serif: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-jp: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background:
    conic-gradient(from 200deg at 25% -8%, transparent 0deg, oklch(75% 0.09 85 / 0.2) 8deg, transparent 17deg),
    conic-gradient(from 152deg at 75% -8%, transparent 0deg, oklch(75% 0.09 85 / 0.2) 8deg, transparent 17deg),
    conic-gradient(from 174deg at 50% -12%, transparent 0deg, oklch(80% 0.08 88 / 0.26) 7deg, transparent 15deg),
    radial-gradient(130% 70% at 50% 0%, oklch(20% 0.06 260) 0%, transparent 65%),
    linear-gradient(180deg, var(--bg-deep) 0%, oklch(6% 0.02 250) 70%, oklch(5% 0.018 250) 100%);
  background-color: var(--bg-deep);
  color: var(--fg);
  font-family: var(--font-jp);
  line-height: 1.6;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

.hero { text-align: center; padding: 22px 20px 26px; position: relative; }
.back { position: absolute; left: 16px; top: 18px; color: var(--gold-d); text-decoration: none; font-size: 13px; font-weight: 700; letter-spacing: 0.04em; }
.back i { font-style: normal; }
.back:hover { color: var(--gold); }
.hero-logo { width: min(170px, 44vw); height: auto; display: block; margin: 6px auto 12px; }
.hero-round { font-family: var(--font-en); font-size: 13px; font-weight: 700; letter-spacing: 0.3em; color: var(--gold); text-indent: 0.3em; }
.hero-title { font-family: var(--font-serif); font-size: clamp(28px, 8vw, 42px); font-weight: 800; letter-spacing: 0.14em; margin: 8px 0 12px; }
.hero-title-en { font-family: var(--font-en); font-weight: 700; letter-spacing: 0.16em; text-indent: 0.16em; background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-title::after { content: ""; display: block; width: 56px; height: 1px; margin: 14px auto 0; background: var(--gold-grad); }
.hero-lead { font-size: clamp(12.5px, 3.3vw, 14px); color: var(--muted); max-width: 540px; margin: 0 auto; }

main { max-width: 760px; margin: 0 auto; padding: 8px 16px 60px; }

.round-label { display: flex; align-items: center; gap: 14px; margin: 30px 0 16px; }
.round-label::before, .round-label::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, transparent, oklch(63% 0.09 80 / 0.4)); }
.round-label::after { background: linear-gradient(90deg, oklch(63% 0.09 80 / 0.4), transparent); }
.round-label span { font-family: var(--font-serif); font-size: 16px; font-weight: 800; letter-spacing: 0.1em; color: var(--gold); white-space: nowrap; }

.vids { display: grid; grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); gap: 10px; }

.vid {
  display: block; text-align: left; cursor: pointer;
  background: var(--surface); border: 1px solid var(--hairline); border-radius: 13px;
  overflow: hidden; color: var(--fg); transition: border-color 0.15s ease, transform 0.15s ease;
  appearance: none; width: 100%; padding: 0;
}
.vid:hover { border-color: oklch(85% 0.15 88 / 0.45); transform: translateY(-2px); }
.vid:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

.vid-thumb { position: relative; aspect-ratio: 16 / 9; background: oklch(24% 0.04 258); display: block; }
.vid-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.vid-thumb::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 50%, oklch(0% 0 0 / 0.18) 0%, transparent 55%);
}
.vid-play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 44px; height: 44px; border-radius: 50%;
  background: oklch(60% 0.22 28); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px oklch(0% 0 0 / 0.4); z-index: 1;
}
.vid-play::after { content: ""; border-left: 14px solid #fff; border-top: 9px solid transparent; border-bottom: 9px solid transparent; margin-left: 3px; }
.vid-date {
  position: absolute; left: 8px; top: 8px; z-index: 1;
  font-family: var(--font-en); font-size: 11px; font-weight: 700; letter-spacing: 0.02em;
  color: var(--fg); background: oklch(8% 0.02 258 / 0.78); border-radius: 6px; padding: 3px 8px;
}

.vid-body { padding: 11px 13px 13px; }
.vid-title { font-size: 14px; font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; }
.vid-sub { font-size: 11.5px; color: var(--muted); margin-top: 2px; }

.footer { text-align: center; padding: 24px 16px 40px; border-top: 1px solid var(--hairline); color: var(--dim); font-size: 12px; letter-spacing: 0.08em; max-width: 760px; margin: 0 auto; }
.footer-sub { font-size: 10.5px; margin-top: 2px; }
.load-error { text-align: center; color: var(--muted); font-size: 14px; padding: 50px 20px; }

/* ===== モーダルプレイヤー ===== */
#player-modal { position: fixed; inset: 0; z-index: 300; display: flex; align-items: center; justify-content: center; padding: 18px; }
#player-modal[hidden] { display: none; }
.player-backdrop { position: absolute; inset: 0; background: oklch(4% 0.015 255 / 0.82); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.player-dialog { position: relative; width: min(820px, 100%); }
.player-frame { aspect-ratio: 16 / 9; border-radius: 14px; overflow: hidden; background: #000; border: 1px solid oklch(63% 0.09 80 / 0.5); box-shadow: 0 24px 80px oklch(0% 0 0 / 0.6); }
.player-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.player-caption { text-align: center; margin-top: 12px; font-size: 13.5px; font-weight: 700; letter-spacing: 0.04em; }
.player-close { position: absolute; top: -42px; right: 0; appearance: none; background: transparent; border: 1px solid oklch(63% 0.09 80 / 0.5); border-radius: 50%; width: 34px; height: 34px; color: var(--gold); font-size: 14px; cursor: pointer; transition: all 0.18s ease; }
.player-close:hover { background: var(--gold-grad); color: oklch(20% 0.04 80); }
.player-close:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

.footer-link { margin-top: 8px; }
.footer-link a { color: var(--gold-d); text-decoration: none; font-size: 11.5px; letter-spacing: 0.04em; border-bottom: 1px solid transparent; }
.footer-link a:hover { color: var(--gold); border-bottom-color: var(--gold-d); }


/* トップへ戻る フローティングボタン */
#to-top { position: fixed; right: 16px; bottom: 18px; z-index: 120; width: 46px; height: 46px; border-radius: 50%; border: 1px solid oklch(63% 0.09 80 / 0.5); background: oklch(12% 0.03 258 / 0.92); color: var(--gold); font-size: 15px; cursor: pointer; opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
#to-top.show { opacity: 1; transform: none; pointer-events: auto; }
#to-top:hover { background: var(--gold-grad); color: oklch(20% 0.04 80); }
#to-top:active { transform: scale(0.94); }
#to-top:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }