/* Medium Blue, Red, White Color Scheme */
:root {
    --medium-blue: #3498db;
    --dark-blue: #2980b9;
    --light-blue: #5dade2;
    --accent-red: #e74c3c;
    --bright-red: #ff6b6b;
    --pure-white: #ffffff;
    --light-gray: #f8f9fa;
    --dark-gray: #343a40;
}

/* Global Styles */
body {
    background-color: var(--light-gray);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Navbar - Medium Blue */
.navbar {
    background-color: var(--medium-blue) !important;
    border-bottom: 3px solid var(--accent-red);
}

.navbar-brand, .navbar-nav .nav-link {
    color: var(--pure-white) !important;
    font-weight: 600;
}

.navbar-nav .nav-link:hover {
    color: var(--bright-red) !important;
    background-color: var(--dark-blue);
    border-radius: 4px;
}

/* Buttons - Red Accents */
.btn-primary {
    background-color: var(--accent-red);
    border-color: var(--accent-red);
    color: var(--pure-white);
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--bright-red);
    border-color: var(--bright-red);
    color: var(--pure-white);
}

.btn-success {
    background-color: #27ae60;
    border-color: #27ae60;
}

.btn-info {
    background-color: var(--light-blue);
    border-color: var(--light-blue);
    color: var(--pure-white);
}

.btn-info:hover {
    background-color: var(--medium-blue);
    border-color: var(--medium-blue);
    color: var(--pure-white);
}

.btn-warning {
    background-color: #f39c12;
    border-color: #f39c12;
}

.btn-outline-primary {
    color: var(--accent-red);
    border-color: var(--accent-red);
}

.btn-outline-primary:hover {
    background-color: var(--accent-red);
    border-color: var(--accent-red);
    color: var(--pure-white);
}

.btn-outline-danger {
    color: var(--bright-red);
    border-color: var(--bright-red);
}

.btn-outline-danger:hover {
    background-color: var(--bright-red);
    border-color: var(--bright-red);
    color: var(--pure-white);
}

/* Cards - White with Blue Headers */
.card {
    border: 1px solid #e0e0e0;
    box-shadow: 0 2px 4px rgba(52, 152, 219, 0.1);
    border-radius: 8px;
}

.card-header {
    background-color: var(--medium-blue);
    color: var(--pure-white);
    border-bottom: 2px solid var(--accent-red);
    font-weight: 600;
    border-radius: 8px 8px 0 0 !important;
}

/* Stats Cards */
.card.bg-primary {
    background-color: var(--medium-blue) !important;
    border: 2px solid var(--accent-red);
}

.card.bg-success {
    background-color: #27ae60 !important;
    border: 2px solid #2ecc71;
}

.card.bg-info {
    background-color: var(--light-blue) !important;
    border: 2px solid var(--medium-blue);
}

/* Alerts */
.alert-success {
    background-color: #d5f4e6;
    border-color: #27ae60;
    color: #229954;
}

.alert-danger {
    background-color: #fadbd8;
    border-color: var(--accent-red);
    color: #c0392b;
}

.alert-info {
    background-color: #d6eaf8;
    border-color: var(--light-blue);
    color: var(--medium-blue);
}

/* Badges */
.badge.bg-primary {
    background-color: var(--medium-blue) !important;
}

.badge.bg-success {
    background-color: #27ae60 !important;
}

.badge.bg-danger {
    background-color: var(--accent-red) !important;
}

.badge.bg-warning {
    background-color: #f39c12 !important;
}

.badge.bg-info {
    background-color: var(--light-blue) !important;
}

/* Tables */
.table {
    border-radius: 8px;
    overflow: hidden;
}

.table thead th {
    background-color: var(--medium-blue);
    color: var(--pure-white);
    border-bottom: 2px solid var(--accent-red);
    font-weight: 600;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(52, 152, 219, 0.05);
}

.table-hover tbody tr:hover {
    background-color: rgba(231, 76, 60, 0.1);
}

/* Progress Bars */
.progress {
    background-color: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    background-color: var(--accent-red);
    background-image: linear-gradient(45deg, var(--accent-red), var(--bright-red));
}

/* Form Controls */
.form-control:focus, .form-select:focus {
    border-color: var(--light-blue);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--medium-blue);
}

/* Exam Timer */
#timer {
    background-color: var(--accent-red);
    color: var(--pure-white);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: bold;
}

/* Question Options */
.options-container .form-check-label {
    padding: 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
    border: 1px solid #e0e0e0;
}

.options-container .form-check-label:hover {
    background-color: rgba(52, 152, 219, 0.1);
    border-color: var(--light-blue);
}

.form-check-input:checked + .form-check-label {
    background-color: rgba(231, 76, 60, 0.1);
    border-color: var(--accent-red);
    color: var(--accent-red);
    font-weight: 600;
}

/* Result Status */
.text-success {
    color: #27ae60 !important;
    font-weight: 600;
}

.text-danger {
    color: var(--accent-red) !important;
    font-weight: 600;
}

/* Blink animation for timer warning */
.blink {
    animation: blink 1s infinite;
    background-color: var(--bright-red) !important;
}

@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* Certificate Preview Styles */
.certificate-preview {
    background: linear-gradient(135deg, var(--pure-white) 0%, #e8f4f8 100%);
    border: 3px solid var(--medium-blue);
    border-radius: 10px;
    padding: 30px;
    position: relative;
}

.certificate-preview::before {
    content: "";
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    border: 2px solid var(--accent-red);
    border-radius: 5px;
    pointer-events: none;
}

/* Login/Register Cards */
.card .card-header.bg-primary {
    background-color: var(--medium-blue) !important;
    border-bottom: 3px solid var(--accent-red);
}

/* Dashboard Quick Actions */
.btn-group .btn {
    border-color: var(--medium-blue);
}

.btn-group .btn.active {
    background-color: var(--medium-blue);
    border-color: var(--medium-blue);
    color: var(--pure-white);
}

/* Pagination */
.page-link {
    color: var(--medium-blue);
    border-color: #dee2e6;
}

.page-link:hover {
    color: var(--accent-red);
    background-color: #e9ecef;
    border-color: #dee2e6;
}

.page-item.active .page-link {
    background-color: var(--medium-blue);
    border-color: var(--medium-blue);
    color: var(--pure-white);
}

/* Custom borders for important elements */
.border-primary {
    border-color: var(--medium-blue) !important;
}

.border-danger {
    border-color: var(--accent-red) !important;
}

/* Text colors */
.text-primary {
    color: var(--medium-blue) !important;
}

.text-danger {
    color: var(--accent-red) !important;
}

/* Background utilities */
.bg-primary {
    background-color: var(--medium-blue) !important;
}

.bg-danger {
    background-color: var(--accent-red) !important;
}

/* List group items */
.list-group-item.active {
    background-color: var(--medium-blue);
    border-color: var(--medium-blue);
    color: var(--pure-white);
}

.list-group-item:hover:not(.active) {
    background-color: rgba(52, 152, 219, 0.05);
}

/* Modal headers */
.modal-header {
    background-color: var(--medium-blue);
    color: var(--pure-white);
    border-bottom: 2px solid var(--accent-red);
}

.modal-title {
    color: var(--pure-white);
    font-weight: 600;
}

/* Footer styling */
.footer {
    background-color: var(--medium-blue);
    color: var(--pure-white);
    border-top: 3px solid var(--accent-red);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .card-header {
        padding: 12px 15px;
    }
    
    .btn-group .btn {
        font-size: 0.875rem;
        padding: 8px 12px;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
}

/* Print styles for certificates */
@media print {
    .certificate-preview {
        border: none;
        box-shadow: none;
    }
    
    .no-print {
        display: none !important;
    }
}

/* Elegant styles for login/register */
.elegant-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.elegant-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: none;
}

.card-header-red {
    background: linear-gradient(135deg, var(--accent-red), var(--bright-red));
    color: white;
    border-radius: 15px 15px 0 0 !important;
    padding: 20px;
}

.card-header-dark-blue {
    background: linear-gradient(135deg, var(--medium-blue), var(--dark-blue));
    color: white;
    border-radius: 15px 15px 0 0 !important;
    padding: 20px;
}

.btn-red {
    background: linear-gradient(135deg, var(--accent-red), var(--bright-red));
    border: none;
    color: white;
    font-weight: 600;
    padding: 12px 30px;
    border-radius: 25px;
}

.btn-red:hover {
    background: linear-gradient(135deg, var(--bright-red), var(--accent-red));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(231, 76, 60, 0.4);
}

.btn-dark-blue {
    background: linear-gradient(135deg, var(--medium-blue), var(--dark-blue));
    border: none;
    color: white;
    font-weight: 600;
    padding: 12px 30px;
    border-radius: 25px;
}

.btn-dark-blue:hover {
    background: linear-gradient(135deg, var(--dark-blue), var(--medium-blue));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.form-control-elegant {
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 12px 15px;
    transition: all 0.3s ease;
}

.form-control-elegant:focus {
    border-color: var(--medium-blue);
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.alert-elegant {
    border-radius: 10px;
    border: none;
    padding: 15px 20px;
}

.navbar-elegant {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.navbar-elegant .navbar-brand {
    color: var(--medium-blue) !important;
    font-weight: 700;
}

.navbar-elegant .nav-link {
    color: var(--medium-blue) !important;
    font-weight: 500;
}

.navbar-elegant .nav-link:hover {
    color: var(--accent-red) !important;
}

.dashboard-header {
    background: linear-gradient(135deg, var(--medium-blue), var(--dark-blue));
    color: white;
    padding: 40px 0;
    margin-bottom: 30px;
}

.stats-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border: none;
    transition: transform 0.3s ease;
}

.stats-card:hover {
    transform: translateY(-5px);
}

.stats-card-red {
    border-left: 5px solid var(--accent-red);
}

.stats-card-blue {
    border-left: 5px solid var(--medium-blue);
}

.stats-card-dark {
    border-left: 5px solid var(--dark-blue);
}

.icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.icon-red {
    background: linear-gradient(135deg, var(--accent-red), var(--bright-red));
    color: white;
}

.icon-dark-blue {
    background: linear-gradient(135deg, var(--medium-blue), var(--dark-blue));
    color: white;
}

.badge-elegant {
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
}

.badge-red {
    background: linear-gradient(135deg, var(--accent-red), var(--bright-red));
    color: white;
}

.badge-blue {
    background: linear-gradient(135deg, var(--medium-blue), var(--dark-blue));
    color: white;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gradient-bg {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.glass-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.professional-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.professional-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border: none;
}

.btn-professional {
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 600;
    border: none;
    transition: all 0.3s ease;
}

.alert-professional {
    border-radius: 15px;
    border: none;
    padding: 20px;
    text-align: center;
}

.bg-off-white {
    background-color: #f8f9fa !important;
}

.text-red {
    color: var(--accent-red) !important;
}

.text-dark-blue {
    color: var(--medium-blue) !important;
}