/**
 * DSECVS - Modern CSS Stylesheet
 * Driving School Examination & Certificate Verification System
 */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --light-bg: #f8fafc;
    --dark-text: #1e293b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.main-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.main-nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    font-size: 0.875rem;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    flex: 1;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-text);
}

/* Cards */
.card {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--dark-text);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #d97706;
}

.btn-info {
    background-color: var(--info-color);
    color: white;
}

.btn-info:hover {
    background-color: #2563eb;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* Forms */
.form {
    max-width: 800px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success-color);
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--danger-color);
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid var(--warning-color);
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid var(--info-color);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table thead {
    background-color: var(--light-bg);
}

.table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 600;
    color: var(--dark-text);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

.text-center {
    text-align: center;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-info {
    background-color: #dbeafe;
    color: #1e40af;
}

/* Statistics Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-icon {
    font-size: 2.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-text);
}

.stat-info p {
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.stat-card.success {
    border-left: 4px solid var(--success-color);
}

.stat-card.danger {
    border-left: 4px solid var(--danger-color);
}

.stat-card.warning {
    border-left: 4px solid var(--warning-color);
}

/* Quick Actions */
.quick-actions {
    margin-bottom: 2rem;
}

.quick-actions h2 {
    margin-bottom: 1rem;
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

/* Search Bar */
.search-bar {
    margin-bottom: 1.5rem;
}

.search-form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.search-form input {
    flex: 1;
    min-width: 250px;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
}

/* Detail Grid */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.detail-label {
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.detail-value {
    color: var(--dark-text);
    font-size: 1rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

/* Student Photo */
.student-photo {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 0.5rem;
    border: 2px solid var(--border-color);
}

.student-photo-large {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 0.5rem;
    border: 2px solid var(--border-color);
}

.student-photo-section {
    margin-top: 1rem;
}

/* Certificate Preview */
.certificate-preview {
    margin-top: 2rem;
}

.certificate-card {
    background: white;
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--primary-color);
}

.certificate-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.certificate-header h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.certificate-body {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    margin-bottom: 2rem;
}

.certificate-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.qr-code-section {
    text-align: center;
}

.qr-code-image {
    width: 200px;
    height: 200px;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem;
    background: white;
}

.qr-url {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--secondary-color);
    word-break: break-all;
}

.certificate-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

/* Result Preview */
.result-preview {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

.result-preview h3 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.info-box {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
}

/* Login Page */
.login-page {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.login-box {
    background: white;
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--secondary-color);
    font-size: 0.875rem;
}

.login-form {
    margin-bottom: 1rem;
}

.login-footer {
    text-align: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--secondary-color);
}

/* Verification Page */
.verify-page {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.verify-container {
    width: 100%;
    max-width: 800px;
}

.verify-header {
    text-align: center;
    color: white;
    margin-bottom: 2rem;
}

.verify-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.verify-box {
    background: white;
    border-radius: 0.5rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.verify-form {
    margin-top: 1rem;
}

.verification-result {
    text-align: center;
    padding: 2rem;
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.verification-result.valid {
    color: var(--success-color);
}

.verification-result.invalid {
    color: var(--danger-color);
}

.cert-number {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1rem 0;
    color: var(--primary-color);
}

.certificate-details {
    text-align: left;
    margin: 2rem 0;
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 0.5rem;
}

.verification-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.verified-time {
    font-size: 0.875rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.verify-footer {
    text-align: center;
    color: white;
    margin-top: 2rem;
    font-size: 0.875rem;
}

/* Footer */
.main-footer {
    background: var(--dark-text);
    color: white;
    padding: 1.5rem;
    text-align: center;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .main-nav {
        width: 100%;
        flex-direction: column;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .certificate-body {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}

/* Utility Classes */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }