/* Main CSS - Alfipedia Security Education */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    /* -45deg gradijent sa više preliva boja */
    background: -webkit-linear-gradient(-45deg,#130322 5%,#390c68 36%,#4b108a 48%,#4f1191 55%,#4a1087 62%,#390c68 70%,#130322 88%);
    background: linear-gradient(-45deg,#130322 5%,#390c68 36%,#4b108a 48%,#4f1191 55%,#4a1087 62%,#390c68 70%,#130322 88%);
    background-attachment: fixed;
    min-height: 100vh;
    width: 100%;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
    position: relative;
    z-index: 1;
}

/* Navigation */
.navbar {
    /* -45deg gradijent sa više preliva boja */
    background: -webkit-linear-gradient(-45deg,#130322 5%,#390c68 36%,#4b108a 48%,#4f1191 55%,#4a1087 62%,#390c68 70%,#130322 88%);
    background: linear-gradient(-45deg,#130322 5%,#390c68 36%,#4b108a 48%,#4f1191 55%,#4a1087 62%,#390c68 70%,#130322 88%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar .nav-link,
.navbar .nav-brand a {
    color: rgba(255, 255, 255, 0.9);
}

.navbar .nav-link:hover {
    color: #ffffff;
}

.navbar .user-name {
    color: rgba(255, 255, 255, 0.9);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

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

.user-menu {
    position: relative;
}

.user-name {
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    padding: 0.5rem;
    display: inline-block;
}

.user-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    margin-top: 0.5rem;
    z-index: 1000;
}

.user-menu:hover .user-dropdown {
    display: block;
}

.user-dropdown a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background-color 0.2s;
}

.user-dropdown a:hover {
    background-color: var(--bg-secondary);
}

.user-dropdown a:first-child {
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
}

.user-dropdown a:last-child {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    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-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

/* Forms */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: 2rem 1rem;
}

.auth-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    width: 100%;
    max-width: 500px;
}

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

.auth-header h1 {
    font-size: 1.875rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.auth-header p {
    color: var(--text-secondary);
}

.auth-form {
    margin-top: 2rem;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 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(--text-secondary);
    font-size: 0.875rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.alert-error {
    background-color: #fef2f2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border-left: 4px solid var(--success-color);
}

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

.page-header h1 {
    font-size: 2.25rem;
    margin-bottom: 0.5rem;
    color: #e8e8e8;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.header-actions {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

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

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

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

.stat-content h3 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

/* Sections */
.section {
    margin-bottom: 3rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 1.5rem;
    color: #cecece;
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.course-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.course-header h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    flex: 1;
    margin-right: 1rem;
}

.course-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    flex: 1;
    line-height: 1.6;
}

.course-meta {
    display: flex;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.course-footer {
    margin-top: auto;
    padding-top: 1rem;
}

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

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

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

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

/* Progress Bar */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar-large {
    width: 100%;
    height: 12px;
    background-color: var(--bg-tertiary);
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.3s;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Filters */
.filters {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.filter-form {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.search-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.filter-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Breadcrumb */
.breadcrumb {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Course Header Section */
.course-header-section {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.course-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 1rem 0;
}

.course-info {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.course-progress {
    margin-top: 1.5rem;
}

/* Modules */
.modules-list {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.modules-list h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.module-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.2s;
}

.module-card:hover {
    box-shadow: var(--shadow-md);
}

.module-card.completed {
    background-color: #f0fdf4;
    border-color: var(--success-color);
}

.module-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.module-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.module-info {
    flex: 1;
}

.module-info h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.module-meta {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.status-badge.completed {
    background-color: var(--success-color);
    color: white;
}

.module-actions {
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-direction: column;
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-form {
        flex-direction: column;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .page-header {
        flex-direction: column;
    }
    
    .header-actions {
        width: 100%;
    }
    
    .header-actions .btn {
        width: 100%;
    }
}