@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #0d9488; /* Teal */
    --primary-hover: #0f766e;
    --secondary-color: #f3f4f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.9);
    --transition: all 0.3s ease;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] {
    --primary-color: #14b8a6;
    --primary-hover: #0d9488;
    --secondary-color: #374151;
    --text-dark: #f9fafb;
    --text-light: #9ca3af;
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.9);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at 100% 0%, rgba(14, 165, 233, 0.05) 0%, transparent 50%),
                      radial-gradient(circle at 0% 100%, rgba(20, 184, 166, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-dark);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navbar */
.navbar {
    background-color: rgba(255, 255, 255, 0.8) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-dark) !important;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Cards & Glassmorphism */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.15);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover)) !important;
    color: white !important;
    border-bottom: none;
    padding: 1.5rem !important;
}

.card-header h4, .card-header h5 {
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* Forms */
.form-control, .form-select {
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    background-color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.1);
    background-color: #ffffff;
}

.form-label {
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* Buttons */
.btn {
    border-radius: 0.5rem;
    padding: 0.6rem 1.5rem;
    font-weight: 600;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.85rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 4px 6px -1px rgba(13, 148, 136, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px -1px rgba(13, 148, 136, 0.4);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
}

/* Tables */
.table {
    vertical-align: middle;
}

.table th {
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: 1rem;
    border-bottom-width: 1px;
}

.table td {
    padding: 1rem;
    color: var(--text-dark);
    font-weight: 500;
}

.table-hover tbody tr {
    transition: var(--transition);
}

.table-hover tbody tr:hover {
    background-color: rgba(13, 148, 136, 0.05);
}

/* Badges */
.badge {
    padding: 0.5em 0.8em;
    border-radius: 2rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* Utilities */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

/* Hover Lift Animation */
.hover-lift {
    transition: var(--transition);
}
.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg) !important;
}

/* Custom Exam Options */
.custom-option {
    border: 2px solid var(--secondary-color);
    border-radius: 0.75rem;
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    background-color: var(--card-bg);
    margin-bottom: 0.75rem;
}
.custom-option:hover {
    border-color: rgba(13, 148, 136, 0.4);
    background-color: rgba(13, 148, 136, 0.05);
}
.custom-option input[type="radio"] {
    display: none;
}
.custom-option-label {
    display: flex;
    align-items: center;
    width: 100%;
    margin: 0;
    cursor: pointer;
    font-weight: 500;
}
.custom-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(13, 148, 136, 0.1);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.1);
}
.custom-option .option-letter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: var(--text-dark);
    margin-right: 1rem;
    font-weight: bold;
    flex-shrink: 0;
    transition: var(--transition);
}
.custom-option.selected .option-letter {
    background-color: var(--primary-color);
    color: white;
}

/* Dark Mode Overrides */
[data-theme="dark"] .navbar {
    background-color: rgba(15, 23, 42, 0.8) !important;
    border-bottom-color: rgba(255, 255, 255, 0.1);
}
[data-theme="dark"] .bg-white {
    background-color: var(--card-bg) !important;
}
[data-theme="dark"] .bg-light {
    background-color: var(--secondary-color) !important;
}
[data-theme="dark"] .text-dark {
    color: var(--text-dark) !important;
}
[data-theme="dark"] .text-muted {
    color: var(--text-light) !important;
}
[data-theme="dark"] .border,
[data-theme="dark"] .border-bottom,
[data-theme="dark"] .border-top {
    border-color: rgba(255, 255, 255, 0.1) !important;
}
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: rgba(15, 23, 42, 0.6);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-dark);
}
[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: rgba(15, 23, 42, 0.9);
}