:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,Noto Sans JP,Hiragino Sans,Yu Gothic,sans-serif;color-scheme:light dark;--bg: #f9fafb;--surface: #ffffff;--surface-2: #f3f4f6;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--border-strong: #d1d5db;--link: #1d4ed8;--link-hover: #1e40af;--primary: #1d4ed8;--primary-hover: #1e40af;--primary-active: #1e3a8a;--on-primary: #ffffff;--danger: #b91c1c;--danger-hover: #991b1b;--danger-active: #7f1d1d;--on-danger: #ffffff;--focus: #60a5fa;--error-text: #991b1b;--error-bg: #fee2e2;--error-border: #fecaca;--success-text: #047857;--success-bg: rgba(16, 185, 129, .18);--spinner-track: var(--border);--spinner-head: var(--text);--qr-border: var(--border-strong);--qr-bg: #ffffff;--qr-fg: #111827;--placeholder-text: rgba(0, 0, 0, .35);--event-ceremony-bg: #dbeafe;--event-lecture-bg: #fce7f3;--event-rocket-bg: #fef3c7;--event-party-bg: #d1fae5}@media(prefers-color-scheme:dark){:root{--bg: #0b1220;--surface: #111827;--surface-2: 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