/* Exam Countdown Styles */

.countdown-hero {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    padding: var(--space-3xl) 0;
    text-align: center;
    margin-top: 80px;
}

.countdown-hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--space-lg);
}

.countdown-hero p {
    font-size: 1.25rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
}

.add-exam-section {
    padding: var(--space-3xl) 0;
    background: var(--gray-50);
}

.add-exam-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 16px;
    padding: var(--space-2xl);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.add-exam-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.input-group {
    margin-bottom: var(--space-lg);
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.input-group input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.add-exam-btn {
    width: 100%;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    border: none;
    padding: var(--space-lg);
    border-radius: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.add-exam-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.4);
}

.exams-section {
    padding: var(--space-3xl) 0;
    background: var(--white);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.section-header h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
}

.exams-list {
    display: grid;
    gap: var(--space-lg);
}

.empty-state {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--gray-500);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty-state h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.exam-card {
    background: var(--white);
    border: 2px solid var(--gray-100);
    border-radius: 16px;
    padding: var(--space-lg);
    position: relative;
    transition: all 0.3s ease;
}

.exam-card.urgent {
    border-color: #ef4444;
    background: linear-gradient(135deg, #fef2f2 0%, #ffffff 100%);
}

.exam-card.warning {
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb 0%, #ffffff 100%);
}

.exam-card.normal {
    border-color: #10b981;
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.exam-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-lg);
}

.exam-info h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--space-xs);
}

.exam-subject {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

.exam-status {
    padding: var(--space-xs) var(--space-sm);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.exam-status.urgent {
    background: #ef4444;
    color: white;
}

.exam-status.warning {
    background: #f59e0b;
    color: white;
}

.exam-status.normal {
    background: #10b981;
    color: white;
}

.countdown-display {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.countdown-unit {
    text-align: center;
    background: var(--gray-50);
    border-radius: 8px;
    padding: var(--space-md);
}

.countdown-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-800);
    display: block;
}

.countdown-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 600;
    text-transform: uppercase;
    margin-top: var(--space-xs);
}

.exam-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--gray-200);
}

.exam-detail {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--gray-600);
    font-size: 0.875rem;
}

.exam-detail i {
    color: var(--primary-color);
}

.delete-exam {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    color: var(--gray-400);
    font-size: 1rem;
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: 4px;
    transition: color 0.3s ease;
}

.delete-exam:hover {
    color: #ef4444;
}

.tips-section {
    padding: var(--space-2xl) 0;
    background: var(--gray-50);
}

.tips-section h3 {
    text-align: center;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--space-2xl);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.tip-card {
    background: var(--white);
    border-radius: 12px;
    padding: var(--space-lg);
    text-align: center;
    border: 2px solid var(--gray-100);
}

.tip-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.tip-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--space-sm);
}

.tip-card p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: var(--space-md);
        align-items: stretch;
    }
    
    .countdown-display {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .exam-details {
        grid-template-columns: 1fr;
    }
    
    .tips-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .countdown-display {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-sm);
    }
    
    .countdown-unit {
        padding: var(--space-sm);
    }
    
    .countdown-number {
        font-size: 1.25rem;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
}