:root{--bg: #0D0F18;--surface: #131620;--surface-2: #1C1F2E;--border: #252A3D;--border-light: #1E2235;--accent: #6366F1;--accent-dim: #6366F118;--green: #22C55E;--green-dim: #22C55E18;--amber: #F59E0B;--amber-dim: #F59E0B18;--red: #EF4444;--red-dim: #EF444418;--text: #E8EAF6;--text-2: #8B90B0;--text-3: #555A78;--radius: 10px;--sidebar-w: 220px}@media (prefers-color-scheme: light){:root{--bg: #F4F5FB;--surface: #FFFFFF;--surface-2: #EEF0FA;--border: #D8DCF0;--border-light: #E8EAF6;--accent: #4F46E5;--accent-dim: #4F46E512;--green: #16A34A;--green-dim: #16A34A12;--text: #111827;--text-2: #4B5280;--text-3: #9094B0}}.layout{display:grid;grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh}.sidebar{background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px 0;position:sticky;top:0;height:100vh;overflow-y:auto}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:8px 20px 20px;border-bottom:1px solid var(--border);margin-bottom:8px}.brand-icon{font-size:22px}.brand-name{font-size:16px;font-weight:700;letter-spacing:-.02em;color:var(--text)}.nav-list{list-style:none;padding:0 10px;margin:0;display:flex;flex-direction:column;gap:2px}.nav-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;text-decoration:none;color:var(--text-2);font-size:14px;font-weight:500;transition:background .12s,color .12s}.nav-link:hover{background:var(--surface-2);color:var(--text)}.nav-link.active{background:var(--accent-dim);color:var(--accent)}.nav-icon{font-size:16px;line-height:1}.nav-label{flex:1}.content{padding:32px 36px;overflow-y:auto}.page-header{margin-bottom:28px}.page-title{font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--text);margin:0 0 4px}.page-subtitle{font-size:14px;color:var(--text-2);margin:0}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px}.habit-row{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:6px;transition:border-color .12s;cursor:pointer}.habit-row:hover{border-color:var(--accent)}.habit-row.done{border-color:var(--green);background:var(--green-dim)}.habit-check{width:20px;height:20px;border:2px solid var(--border);border-radius:5px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:12px;transition:background .12s,border-color .12s}.habit-row.done .habit-check{background:var(--green);border-color:var(--green);color:#fff}.habit-emoji{font-size:18px;flex-shrink:0}.habit-name{font-size:14px;font-weight:500;color:var(--text);flex:1}.streak-badge{font-size:11px;font-weight:600;padding:3px 8px;border-radius:4px;font-family:monospace;background:var(--accent-dim);color:var(--accent);flex-shrink:0}.streak-badge.hot{background:var(--amber-dim);color:var(--amber)}.category-section{margin-bottom:28px}.category-header{display:flex;align-items:center;gap:8px;margin-bottom:10px}.category-title{font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3)}.category-count{font-size:11px;color:var(--text-3);font-family:monospace}.stats-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:28px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:center}.stat-num{font-size:30px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;display:block;line-height:1;margin-bottom:4px}.stat-label{font-size:11px;color:var(--text-3);letter-spacing:.04em}.loading{display:flex;align-items:center;justify-content:center;height:200px;color:var(--text-3);font-size:14px}.error-box{background:var(--red-dim);border:1px solid var(--red);border-radius:var(--radius);padding:14px 16px;font-size:13px;color:var(--text);margin-bottom:20px}.ring-wrap{display:flex;align-items:center;gap:16px;margin-bottom:24px}@media (max-width: 700px){.layout{grid-template-columns:1fr}.sidebar{flex-direction:row;height:auto;position:static;overflow-x:auto;padding:0;border-right:none;border-bottom:1px solid var(--border)}.sidebar-brand{padding:12px 16px;border-bottom:none;margin-bottom:0}.nav-list{flex-direction:row;padding:8px;gap:4px}.nav-label{display:none}.content{padding:20px 16px}}