* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.header {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header h1 {
    color: #667eea;
    margin-bottom: 10px;
}

.header p {
    color: #666;
}

.add-task-section, .strategy-section, .results-section {
    background: white;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
}

.task-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

label {
    font-weight: 600;
    margin-bottom: 5px;
    color: #555;
}

input[type="text"],
input[type="date"],
input[type="number"] {
    padding: 10px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.btn-analyze {
    background: #10b981;
    color: white;
    width: 100%;
    margin-top: 20px;
    font-size: 18px;
}

.btn-analyze:hover {
    background: #059669;
}

.strategy-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 10px;
}

.btn-strategy {
    padding: 15px;
    border: 2px solid #e0e0e0;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-weight: 600;
    color: #333;
}

.btn-strategy small {
    font-weight: normal;
    color: #999;
    margin-top: 5px;
}

.btn-strategy:hover {
    border-color: #667eea;
    transform: translateY(-2px);
}

.btn-strategy.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.btn-strategy.active small {
    color: rgba(255, 255, 255, 0.8);
}

.loading {
    text-align: center;
    padding: 40px;
    background: white;
    border-radius: 10px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none;
}

.results-info {
    color: #666;
    margin-bottom: 20px;
    font-style: italic;
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-card {
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.task-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.task-card:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.task-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.priority-badge {
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
}

.priority-high {
    background: #fee2e2;
    color: #dc2626;
}

.priority-medium {
    background: #fef3c7;
    color: #d97706;
}

.priority-low {
    background: #dbeafe;
    color: #2563eb;
}

.task-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 15px;
}

.detail-item {
    font-size: 14px;
    color: #666;
}

.detail-item strong {
    color: #333;
}

.task-explanation {
    background: #f9fafb;
    padding: 15px;
    border-radius: 5px;
    font-size: 14px;
}

.task-explanation h4 {
    color: #667eea;
    margin-bottom: 10px;
    font-size: 14px;
}

.explanation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}

.explanation-item {
    padding: 8px;
    background: white;
    border-radius: 4px;
}

.explanation-item strong {
    display: block;
    color: #667eea;
    margin-bottom: 3px;
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .strategy-buttons {
        grid-template-columns: 1fr;
    }
    
    .task-details {
        grid-template-columns: 1fr;
    }
}
.btn-delete {
    background: #dc2626;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: 0.3s;
}

.btn-delete:hover {
    background: #b91c1c;
    transform: translateY(-2px);
}