.timer-section {
    max-width: 1000px;
    margin: 0 auto;
}

.timer-section > p {
    margin-bottom: 2rem;
    color: #666;
}

/* Timer Container */
.timer-container {
    background: #fafafa;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid #e0e0e0;
    text-align: center;
}

.timer-display {
    margin-bottom: 2rem;
}

.timer-time {
    font-size: 4rem;
    font-weight: 700;
    color: #333;
    font-variant-numeric: tabular-nums;
    margin-bottom: 0.5rem;
}

.timer-level {
    font-size: 1.2rem;
    color: #666;
    font-weight: 500;
}

.timer-level.easy-level {
    color: #4caf50;
}

.timer-level.hard-level {
    color: #ff6b6b;
}

/* Level Selector */
.level-selector {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.level-btn {
    padding: 0.75rem 2rem;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    background: white;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.level-btn:hover {
    border-color: #FDD0BD;
    background: #fff5f0;
}

.level-btn.active {
    border-color: #FDD0BD;
    background: #FDD0BD;
    color: #333;
}

.level-btn.active[data-level="easy"] {
    background: #4caf50;
    border-color: #4caf50;
    color: white;
}

.level-btn.active[data-level="hard"] {
    background: #ff6b6b;
    border-color: #ff6b6b;
    color: white;
}

/* Timer Controls */
.timer-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.control-btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.start-btn {
    background: #4caf50;
    color: white;
}

.start-btn:hover {
    background: #45a049;
    transform: translateY(-1px);
}

.stop-btn {
    background: #ff6b6b;
    color: white;
}

.stop-btn:hover {
    background: #ff5252;
    transform: translateY(-1px);
}

.reset-btn {
    background: #e0e0e0;
    color: #333;
}

.reset-btn:hover {
    background: #d0d0d0;
}

.save-btn {
    background: #FDD0BD;
    color: #333;
}

.save-btn:hover {
    background: #fcc5a8;
    transform: translateY(-1px);
}

.session-info {
    margin-top: 1rem;
    padding: 0.75rem;
    background: #d4edda;
    color: #155724;
    border-radius: 4px;
    border: 1px solid #c3e6cb;
}

/* Stats Container */
.stats-container {
    margin-bottom: 2rem;
}

.stats-container h3 {
    margin-bottom: 1rem;
    color: #333;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.stat-card {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: #333;
    font-variant-numeric: tabular-nums;
}

/* History Container */
.history-container {
    margin-top: 3rem;
}

.history-container h3 {
    margin-bottom: 1rem;
    color: #333;
}

.month-selector {
    margin-bottom: 1.5rem;
}

.month-selector select {
    padding: 0.5rem 1rem;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
}

.history-table-container {
    overflow-x: auto;
    margin-bottom: 1rem;
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.history-table thead {
    background: #FDD0BD;
}

.history-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: #333;
}

.history-table td {
    padding: 0.75rem 1rem;
    border-top: 1px solid #e0e0e0;
}

.history-table tbody tr:hover {
    background: #fafafa;
}

.month-totals {
    margin-top: 1rem;
    padding: 1rem;
    background: #fafafa;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.total-display {
    font-size: 1.1rem;
    color: #333;
}

/* Responsive Design */
@media (max-width: 768px) {
    .timer-time {
        font-size: 3rem;
    }
    
    .level-selector {
        flex-direction: column;
    }
    
    .level-btn {
        width: 100%;
    }
    
    .timer-controls {
        flex-direction: column;
    }
    
    .control-btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .history-table {
        font-size: 0.9rem;
    }
    
    .history-table th,
    .history-table td {
        padding: 0.5rem;
    }
}