*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f8f9fc;--bg-card: #ffffff;--bg-input: #f1f3f5;--bg-hover: #f1f3f5;--text: #1a1b2e;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--border: #e5e7eb;--border-focus: #6366f1;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 30px rgba(0, 0, 0, .08);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 20px;--primary: #6366f1;--primary-hover: #4f46e5;--primary-light: rgba(99, 102, 241, .1);--danger: #ef4444;--danger-hover: #dc2626;--success: #22c55e;--grid-cell: #e8e8ec;--grid-cell-hover: #d4d4d8;--transition: .15s ease}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}.app-container{max-width:900px;margin:0 auto;padding:24px 5px 64px}.app-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;gap:12px}.app-header-left{display:flex;align-items:center;gap:12px}.app-logo{width:36px;height:36px;background:linear-gradient(135deg,#6366f1,#8b5cf6);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px}.app-title{font-size:20px;font-weight:700;letter-spacing:-.3px}.app-header-actions{display:flex;gap:8px;align-items:center}.user-email{font-size:13px;color:var(--text-secondary)}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:var(--radius-sm);font-size:14px;font-weight:500;cursor:pointer;transition:all var(--transition);white-space:nowrap;line-height:1}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover);box-shadow:var(--shadow-sm)}.btn-secondary{background:var(--bg-input);color:var(--text)}.btn-secondary:hover{background:var(--border)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:6px;border-radius:var(--radius-sm)}.btn-ghost:hover{background:var(--bg-hover);color:var(--text)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:var(--danger-hover)}.btn-icon{padding:6px;border-radius:var(--radius-sm);line-height:0}.btn-sm{padding:5px 10px;font-size:13px}.input{width:100%;padding:10px 12px;background:var(--bg-input);border:1.5px solid transparent;border-radius:var(--radius-sm);font-size:14px;color:var(--text);transition:all var(--transition);outline:none}.input:focus{border-color:var(--border-focus);background:var(--bg-card);box-shadow:0 0 0 3px #6366f126}.input::placeholder{color:var(--text-tertiary)}select.input{cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:32px}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;transition:all var(--transition)}.card:hover{box-shadow:var(--shadow-md)}.card-header{display:flex;align-items:center;gap:14px;margin-bottom:14px}.card-icon{width:42px;height:42px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.card-info{flex:1;min-width:0}.card-name{font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px}.card-meta{font-size:13px;color:var(--text-secondary);display:flex;align-items:center;gap:8px;margin-top:2px}.card-actions{display:flex;gap:4px;flex-shrink:0}.date-nav{display:flex;align-items:center;gap:12px;margin-bottom:20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:12px 16px}.date-nav-label{font-size:14px;font-weight:600;flex:1;text-align:center}.categories-bar{display:flex;gap:6px;margin-bottom:20px;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch}.category-chip{display:inline-flex;align-items:center;gap:5px;padding:6px 14px;border-radius:20px;font-size:13px;font-weight:500;border:1.5px solid transparent;cursor:pointer;transition:all var(--transition);white-space:nowrap;background:var(--bg-input);color:var(--text-secondary)}.category-chip:hover{background:var(--border)}.category-chip.active{border-color:var(--primary);background:var(--primary-light);color:var(--primary)}.category-chip-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}.contribution-grid{display:flex;gap:3px;margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}.contribution-col{display:flex;flex-direction:column;gap:3px}.contribution-cell{width:12px;height:12px;border-radius:3px;transition:all var(--transition);cursor:pointer;position:relative}.contribution-cell:hover{transform:scale(1.3);z-index:1}.contribution-cell.empty{background:var(--grid-cell)}.contribution-cell.filled{opacity:.85}.contribution-cell.filled:hover{opacity:1}.contribution-cell.today{outline:2px solid var(--text);outline-offset:1px}.contribution-tooltip{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background:var(--text);color:var(--bg-card);font-size:11px;padding:3px 6px;border-radius:4px;white-space:nowrap;pointer-events:none;opacity:0;transition:opacity var(--transition);margin-bottom:4px}.contribution-cell:hover .contribution-tooltip{opacity:1}.contribution-labels{display:flex;justify-content:space-between;margin-top:6px;font-size:10px;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px}.habit-form{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:20px;animation:slideDown .2s ease}.habit-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.habit-form-full{grid-column:1 / -1}.habit-form-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}.color-picker-group{display:flex;gap:6px;align-items:center}.color-swatch{width:28px;height:28px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all var(--transition)}.color-swatch:hover{transform:scale(1.15)}.color-swatch.selected{border-color:var(--text)}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:24px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px;text-align:center}.stat-value{font-size:22px;font-weight:700;line-height:1.2}.stat-label{font-size:12px;color:var(--text-secondary);margin-top:2px}.empty-state{text-align:center;padding:60px 24px;color:var(--text-secondary)}.empty-state-icon{font-size:48px;margin-bottom:12px;opacity:.4}.empty-state-text{font-size:15px}.empty-state-sub{font-size:13px;color:var(--text-tertiary);margin-top:4px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:linear-gradient(135deg,#667eea,#764ba2)}.auth-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:40px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}.auth-title{font-size:24px;font-weight:700;margin-bottom:4px;letter-spacing:-.5px}.auth-subtitle{font-size:14px;color:var(--text-secondary);margin-bottom:28px}.auth-form{display:grid;gap:14px}.auth-switch{margin-top:20px;text-align:center;font-size:14px;color:var(--text-secondary)}.auth-switch button{background:none;border:none;color:var(--primary);font-weight:600;cursor:pointer;font-size:14px}.auth-switch button:hover{text-decoration:underline}.auth-error{background:#fef2f2;border:1px solid #fecaca;color:var(--danger);padding:10px 14px;border-radius:var(--radius-sm);font-size:13px}.loading-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;font-size:15px;color:var(--text-secondary)}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.fade-in{animation:fadeIn .2s ease}