@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&family=Noto+Sans+Georgian:wght@400;600;700&display=swap');

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border-color: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-orange: #f0883e;
    --accent-red: #f85149;
    --accent-purple: #a371f7;
}

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

body {
    font-family: 'Noto Sans Georgian', 'JetBrains Mono', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.5rem;
    color: var(--accent-blue);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

.modal-body {
    padding: 20px;
}

/* Auth Forms */
.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.tab-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent-blue);
    color: #000;
    border-color: var(--accent-blue);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.auth-form input {
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.error-message {
    margin-top: 15px;
    padding: 10px;
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--accent-red);
    border-radius: 6px;
    color: var(--accent-red);
    display: none;
}

.error-message.show {
    display: block;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-blue);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #1f6feb);
    border-color: var(--accent-blue);
    color: #fff;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    background: var(--bg-tertiary);
}

/* Header */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-content h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-nav {
    display: flex;
    gap: 20px;
    align-items: center;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.header-nav a:hover {
    color: var(--accent-blue);
}

.user-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Main Content */
.app-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

.page h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--accent-blue);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.course-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    color: inherit;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    border-color: var(--accent-blue);
}

.course-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--accent-blue);
}

.course-card p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.6;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Modules */
.modules-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 30px;
}

.module-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.module-item:hover {
    border-color: var(--accent-blue);
    background: var(--bg-tertiary);
}

.module-info h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.module-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.module-status {
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-bar {
    width: 150px;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-green));
    transition: width 0.3s;
}

.status-badge {
    padding: 5px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.completed {
    background: var(--accent-green);
    color: #000;
}

.status-badge.in-progress {
    background: var(--accent-orange);
    color: #000;
}

.status-badge.not-started {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

/* Admin Panel */
.admin-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.admin-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
}

.admin-section h3 {
    margin-bottom: 20px;
    color: var(--accent-blue);
}

.form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form input,
.form textarea {
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
}

.form textarea {
    min-height: 100px;
    resize: vertical;
}

.form input:focus,
.form textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* Users Table */
.users-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.users-table th,
.users-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.users-table th {
    background: var(--bg-tertiary);
    color: var(--accent-blue);
    font-weight: 600;
}

.users-table tr:hover {
    background: var(--bg-tertiary);
}

.btn-small {
    padding: 5px 10px;
    font-size: 0.8rem;
    min-width: auto;
}

.btn-small:hover {
    transform: scale(1.1);
}

/* Progress List */
.progress-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 15px;
}

.progress-item h4 {
    margin-bottom: 10px;
    color: var(--accent-blue);
}

.progress-item .course-title {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .header-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}