:root { --ink: #1e2b6f; --ink-2: #3447a4; --paper: #f5f5f7; --sheet: #ffffff; --text: #1d1d1f; --muted: #6e6e73; --line: #e4e4e7; --red: #c2412d; --red-soft: #fbe9e5; --e2: 0 4px 14px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.04); --ease-out: cubic-bezier(.16,1,.3,1); --ui: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Instrument Sans', system-ui, 'Segoe UI', Roboto, sans-serif; color-scheme: light; }
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { font-family: var(--ui); font-size: 15px; line-height: 1.5; color: var(--text); background: var(--paper); -webkit-font-smoothing: antialiased; letter-spacing: -.011em; }
a { color: var(--ink-2); }
.shell { max-width: 1040px; margin: 0 auto; padding: 24px 18px 56px; animation: rise .5s var(--ease-out) both; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .shell { animation: none; } }
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; }
.brand .mark { font-weight: 700; font-size: 14px; color: #fff; background: var(--ink); border-radius: 8px; padding: 5px 10px; }
h1 { font-size: clamp(20px, 3vw, 26px); letter-spacing: -.02em; margin: 0; }
.stage { background: #000; border-radius: 18px; overflow: hidden; box-shadow: var(--e2); aspect-ratio: 16 / 9; }
.stage iframe { display: block; width: 100%; height: 100%; border: 0; }
@media (max-width: 640px) { .stage { aspect-ratio: auto; height: 72vh; } }
.hint { font-size: 13px; color: var(--muted); margin: 12px 2px 0; }
.btn { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; background: var(--sheet); text-decoration: none; color: var(--ink-2); font-weight: 500; }
.notice { background: var(--red-soft); color: var(--red); border-radius: 12px; padding: 14px 16px; }
.loading { text-align: center; color: var(--muted); padding: 60px 0; }
.card { background: var(--sheet); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--e2); padding: 28px; margin-top: 8px; text-align: center; }
.card h2 { margin: 0 0 6px; font-size: 20px; letter-spacing: -.02em; }
.card .meta { margin: 0; color: var(--muted); }