:root{--primary-gradient:linear-gradient(135deg,#667eea 0%,#764ba2 100%);--success-color:#48bb78;--warning-color:#f59e0b;--danger-color:#ef4444}.form-input{width:100%;padding:12px 15px;border:2px solid var(--success-color);border-radius:12px;font-size:1rem;transition:all .3s ease;background:#fff}.form-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1)}.input-label{font-weight:600;color:#2d3748;margin-bottom:8px;display:flex;align-items:center;gap:8px}.input-group-custom{margin-bottom:20px}.input-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:20px}.tooltip-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-radius:50%;font-size:12px;cursor:help;position:relative}.tooltip-icon .tooltip-text{visibility:hidden;background-color:#2d3748;color:#fff;text-align:center;padding:8px 12px;border-radius:8px;position:absolute;z-index:1000;bottom:125%;left:50%;transform:translateX(-50%);width:200px;font-size:12px;opacity:0;transition:opacity .3s;font-weight:normal}.tooltip-icon:hover .tooltip-text{visibility:visible;opacity:1}.subject-item{background:#f7fafc;border:2px solid #e2e8f0;border-radius:12px;padding:20px;margin-bottom:15px;position:relative}.subject-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.subject-number{background:var(--primary-gradient);color:#fff;width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.remove-subject-btn{background:var(--danger-color);color:#fff;border:none;padding:5px 10px;border-radius:6px;cursor:pointer;font-size:.85rem;transition:all .3s ease}.remove-subject-btn:hover{background:#dc2626;transform:scale(1.05)}.btn-add-subject{background:var(--success-color);color:#fff;border:none;padding:10px 20px;border-radius:10px;font-weight:600;cursor:pointer;transition:all .3s ease;margin-top:10px}.btn-add-subject:hover{background:#38a169;transform:scale(1.02)}.result-card{background:var(--primary-gradient);color:#fff;padding:25px;border-radius:16px;margin-bottom:20px}.result-main{text-align:center;margin-bottom:20px}.result-label{font-size:1.1rem;opacity:.9;margin-bottom:10px}.result-value{font-size:2.5rem;font-weight:700;text-shadow:0 2px 10px rgba(0,0,0,.2)}.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:15px;margin-top:20px}.result-item{background:rgba(255,255,255,.2);padding:15px;border-radius:12px;text-align:center}.result-item-label{font-size:.9rem;opacity:.9;margin-bottom:5px}.result-item-value{font-size:1.5rem;font-weight:700}.study-plan-table{width:100%;border-collapse:collapse;margin-top:20px}.study-plan-table th{background:var(--primary-gradient);color:#fff;padding:12px;text-align:left;font-weight:600}.study-plan-table td{padding:12px;border-bottom:1px solid #e2e8f0}.study-plan-table tr:hover{background:#f7fafc}.progress-bar{background:#e2e8f0;border-radius:10px;height:8px;overflow:hidden;margin:5px 0}.progress-fill{background:var(--success-color);height:100%;transition:width .3s ease}.pomodoro-timer{text-align:center;padding:30px}.timer-display{font-size:4rem;font-weight:700;color:#667eea;margin:20px 0;font-family:'Courier New',monospace}.timer-controls{display:flex;gap:10px;justify-content:center;margin-top:20px}.timer-btn{padding:12px 30px;border:none;border-radius:10px;font-weight:600;cursor:pointer;transition:all .3s ease}.timer-btn-start{background:var(--success-color);color:#fff}.timer-btn-pause{background:var(--warning-color);color:#fff}.timer-btn-reset{background:var(--danger-color);color:#fff}.warning-box{background:#fef3c7;border-left:4px solid var(--warning-color);padding:15px;border-radius:8px;margin:15px 0}.warning-box.danger{background:#fee2e2;border-left-color:var(--danger-color)}.warning-box.success{background:#d1fae5;border-left-color:var(--success-color)}.tips-list{list-style:none;padding:0}.tips-list li{padding:12px;margin:8px 0;background:#f0fdf4;border-left:4px solid var(--success-color);border-radius:8px}.tips-list li:before{content:"✓ ";color:var(--success-color);font-weight:700;margin-right:10px}.live-stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-top:20px}.live-stat-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 4px 15px rgba(0,0,0,.1);text-align:center;transition:transform .3s ease}.live-stat-card:hover{transform:translateY(-5px)}.live-stat-icon{font-size:2rem;margin-bottom:10px}.live-stat-value{font-size:2rem;font-weight:700;background:var(--primary-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.live-stat-label{font-size:.9rem;color:#718096;margin-top:5px}@media(max-width:768px){.page-header h1{font-size:2rem}.timer-display{font-size:3rem}.result-value{font-size:2rem}.input-row{grid-template-columns:1fr}.live-stats-grid{grid-template-columns:1fr}}@keyframes fadeInDown{from{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{transform:scale(0);opacity:0}50%{transform:scale(1.1)}100%{transform:scale(1);opacity:1}}@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}