:root{--bg: #f4f5f7;--surface: #ffffff;--surface-2: #f8f9fb;--border: #e2e5ea;--border-strong: #cfd4dc;--text: #1b2230;--text-2: #5b6474;--text-3: #8b93a1;--accent: #2b59e0;--accent-hover: #2149c2;--accent-bg: #e9effd;--warning: #9a5b00;--warning-bg: #fdf1dc;--danger: #b42318;--danger-bg: #fdeceb;--success: #17703f;--success-bg: #e3f5ea;--neutral-bg: #eef0f3;--radius: 8px;--shadow: 0 1px 2px rgba(16, 24, 40, .05);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,PingFang SC,Noto Sans JP,Noto Sans SC,Yu Gothic UI,Microsoft 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button.active{color:var(--text);font-weight:600;background:var(--accent-bg)}.toasts{position:fixed;right:20px;bottom:20px;z-index:100;display:flex;flex-direction:column;gap:8px}.toast{max-width:420px;padding:10px 14px;color:#fff;background:#1f2937;border-radius:var(--radius);box-shadow:0 8px 24px #10182840}.toast.error{background:var(--danger)}.center-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}.center-card{width:100%;max-width:380px;padding:32px;text-align:center}@media (max-width: 900px){.board,.metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.detail-grid,.composer,.split{grid-template-columns:minmax(0,1fr)}.topbar{gap:12px;padding:0 12px;overflow-x:auto}.page{padding:16px 12px}}@media (max-width: 560px){.board,.form-grid{grid-template-columns:minmax(0,1fr)}.log li{grid-template-columns:minmax(0,1fr);gap:0}}