/* L-005: Enhanced Visual Design */

:root {
    /* Enhanced Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --warning-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.2);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* Enhanced Card Styling */
.card {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Enhanced Button Styling */
.btn {
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn.primary {
    background: var(--primary-gradient);
    border: none;
    color: white;
}

.btn.success {
    background: var(--success-gradient);
    border: none;
    color: white;
}

/* Enhanced Input Fields */
.form-control, .input {
    border-radius: var(--radius-md);
    border: 2px solid #e0e0e0;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus, .input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
}

/* Enhanced Headers */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
    color: #2d3748;
}

/* Gradient Text */
.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Enhanced Table Styling */
.table {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead th {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: #495057;
    border: none;
}

.table tbody tr {
    transition: background-color 0.2s;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* Enhanced Badges */
.badge {
    border-radius: var(--radius-sm);
    padding: 0.35em 0.65em;
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* Micro-animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeIn 0.3s ease-out;
}

/* Loading Spinner Enhancement */
.spinner-border {
    border-width: 0.2em;
}

/* Enhanced Modal */
.modal-content {
    border-radius: var(--radius-lg);
    border: none;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 2px solid #e0e0e0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* Glassmorphism Effect */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Smooth Transitions */
* {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Exam Section Color Palette Picker */
.color-palette-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.35rem 0;
}

.color-swatch {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2.5px solid transparent;
    cursor: pointer;
    padding: 0;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    outline: none;
}

.color-swatch:hover {
    transform: scale(1.18);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.color-swatch--selected {
    border-color: #0f172a;
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.25);
    transform: scale(1.12);
}