*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #fffbeb;--surface: #ffffff;--text: #292524;--text-muted: #78716c;--border: #d6d3d1;--primary: #d97706;--primary-hover: #b45309;--accent: #ca8a04;--accent-hover: #a16207;--danger: #dc2626;--success: #16a34a;--radius: 10px;--shadow-sm: 0 1px 3px rgba(120, 80, 0, .08);--shadow-md: 0 4px 12px -2px rgba(120, 80, 0, .12);--gold-gradient: linear-gradient(135deg, #fbbf24, #f59e0b, #d97706)}html{font-family:Inter,system-ui,-apple-system,sans-serif;font-size:16px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}body{min-height:100dvh}.app{max-width:520px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:linear-gradient(135deg,#fffbeb,#fef3c7);border-bottom:1px solid 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li{color:var(--danger);font-size:.85rem;padding:6px 10px;background:#fef2f2;border-radius:6px;border-left:3px solid var(--danger)}.instructions{color:var(--text-muted);font-size:.72rem;text-align:center;opacity:.7}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 18px;border:none;border-radius:var(--radius);font-size:.875rem;font-weight:600;cursor:pointer;transition:background .15s,color .15s,box-shadow .15s}.btn--primary{background:var(--primary);color:#fff}.btn--primary:hover{background:var(--primary-hover)}.btn--accent{background:var(--accent);color:#fff}.btn--accent:hover{background:var(--accent-hover)}.btn--ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}.btn--ghost:hover{background:var(--bg);color:var(--text)}.btn--sm{padding:4px 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var(--border)}.tab{padding:8px 14px;background:none;border:none;cursor:pointer;font-size:.82rem;font-weight:500;color:var(--text-muted);border-bottom:2px solid transparent;transition:color .15s,border-color .15s}.tab--active{color:#b45309;border-bottom-color:#f59e0b}.tab-content{padding-top:10px}.challenge-list{display:flex;flex-direction:column;gap:10px}.challenge-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px;display:flex;flex-direction:column;gap:6px;font-size:.85rem}.challenge-header{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.challenge-results{font-size:.8rem;padding-left:8px}.member-list{list-style:none;display:flex;flex-direction:column;gap:8px}.member-item{display:flex;align-items:center;gap:8px;font-size:.85rem}.member-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover}input[type=text]{padding:6px 10px;border:1px solid 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8px;border-radius:var(--radius)}.cal-nav-title:hover{background:var(--border)}.cal-summary{text-align:center;font-size:.85rem;color:var(--text-muted);margin-bottom:12px}.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:2px}.cal-header{text-align:center;font-size:.75rem;font-weight:600;color:var(--text-muted);padding:6px 0;text-transform:uppercase;letter-spacing:.5px}.cal-cell{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:6px 2px;border-radius:6px;background:var(--surface);border:1.5px solid var(--border);cursor:pointer;transition:all .15s ease;min-height:56px;gap:1px;font-family:inherit}.cal-cell:hover:not(.cal-cell--blank):not(.cal-cell--disabled){border-color:#f59e0b;box-shadow:var(--shadow-sm);transform:translateY(-1px)}.cal-cell--blank{background:transparent;border-color:transparent;cursor:default}.cal-cell--today{border-color:#f59e0b;border-width:2px;background:#fffbeb}.cal-cell--solved{background:#fefce8;border-color:#fbbf24}.cal-cell--solved .cal-dot{color:#d97706;font-size:1rem}.cal-cell--future{opacity:.35;cursor:default}.cal-cell--disabled{opacity:.3;cursor:default}.cal-day{font-size:.85rem;font-weight:600;color:var(--text);line-height:1}.cal-dot{font-size:.65rem;line-height:1}.cal-time{font-size:.6rem;color:var(--text-muted);font-weight:500;letter-spacing:.3px;line-height:1}.cal-legend{display:flex;justify-content:center;gap:12px;margin-top:16px;font-size:.75rem;color:var(--text-muted);flex-wrap:wrap}.cal-legend-icon{margin-right:2px}.cal-back-btn{margin-bottom:12px}@media(max-width:420px){.nav-item{padding:8px 4px;font-size:.7rem}.nav-icon{font-size:1.1rem}.cal-cell{min-height:48px;padding:4px 1px}.cal-day{font-size:.78rem}}