/* ====================================
   LMS Internal Company - Main Stylesheet
   ==================================== */

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

:root {
    --primary-color: #7c3aed;
    --secondary-color: #06b6d4;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --sidebar-width: 280px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ====================================
   Sidebar
   ==================================== */

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: #0f172a;
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.sidebar-brand span {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin: 0.5rem 0;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-menu a i {
    width: 20px;
    text-align: center;
}

/* ====================================
   Main Content
   ==================================== */

.main-container {
    margin-left: var(--sidebar-width);
}

.topbar {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-left h1 {
    font-size: 1.5rem;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background-color: rgba(124, 58, 237, 0.1);
    border-radius: 8px;
    cursor: pointer;
}

.user-profile img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--border-color);
}

.content {
    padding: 2rem;
}

/* ====================================
   Dashboard Cards
   ==================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.1);
}

.stat-content h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-content .number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
}

.stat-content .change {
    font-size: 0.875rem;
    color: var(--success-color);
    margin-top: 0.5rem;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    flex-shrink: 0;
}

.stat-icon.primary {
    background-color: rgba(124, 58, 237, 0.2);
    color: var(--primary-color);
}

.stat-icon.secondary {
    background-color: rgba(6, 182, 212, 0.2);
    color: var(--secondary-color);
}

.stat-icon.success {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.stat-icon.warning {
    background-color: rgba(245, 158, 11, 0.2);
    color: var(--accent-color);
}

/* ====================================
   Course Grid
   ==================================== */

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

.section-title a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

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

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.course-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

.course-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.2);
    transform: translateY(-5px);
}

.course-thumbnail {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.3), rgba(6, 182, 212, 0.3));
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.course-card-content {
    padding: 1.5rem;
}

.course-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.course-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.course-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.course-progress {
    margin-bottom: 1rem;
}

.progress-label {
    font-size: 0.875rem;
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* ====================================
   Badges/Achievements
   ==================================== */

.badges-section {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.badge:hover {
    background-color: rgba(124, 58, 237, 0.1);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

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

.badge-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.badge-earned {
    font-size: 0.625rem;
    color: var(--text-secondary);
}

.badge.locked .badge-icon {
    opacity: 0.4;
}

/* ====================================
   Level/XP Section
   ==================================== */

.level-section {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.level-badge {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 1rem;
}

.level-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.level-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.xp-bar {
    width: 100%;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.xp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

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

/* ====================================
   Leaderboard
   ==================================== */

.leaderboard {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.leaderboard-list {
    list-style: none;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

.leaderboard-item:hover {
    background-color: rgba(124, 58, 237, 0.1);
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.leaderboard-rank {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.leaderboard-rank.top-1 {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
}

.leaderboard-rank.top-2 {
    background: linear-gradient(135deg, #d1d5db, #9ca3af);
}

.leaderboard-rank.top-3 {
    background: linear-gradient(135deg, #fb923c, #ea580c);
}

.leaderboard-info {
    flex: 1;
}

.leaderboard-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

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

.leaderboard-xp {
    text-align: right;
}

.leaderboard-xp strong {
    display: block;
    font-size: 1.125rem;
    color: var(--accent-color);
}

.leaderboard-xp small {
    color: var(--text-secondary);
}

/* ====================================
   Table Styles
   ==================================== */

.table-container {
    overflow-x: auto;
    margin-top: 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
}

thead {
    background-color: rgba(124, 58, 237, 0.1);
}

th {
    padding: 1rem;
    text-align: left;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-color);
}

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

tbody tr:hover {
    background-color: rgba(124, 58, 237, 0.05);
}

/* ====================================
   Buttons
   ==================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: #6d28d9;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

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

.btn-secondary:hover {
    background-color: #0891b2;
}

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

/* ====================================
   Responsive
   ==================================== */

@media (max-width: 768px) {
    .sidebar {
        width: 70px;
        padding: 1rem 0;
    }

    .sidebar-brand {
        justify-content: center;
        margin-bottom: 2rem;
    }

    .sidebar-brand text {
        display: none;
    }

    .sidebar-menu a {
        justify-content: center;
        padding: 0.75rem 0;
    }

    .sidebar-menu a span {
        display: none;
    }

    .main-container {
        margin-left: 70px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .course-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        flex-direction: column;
        gap: 1rem;
    }

    .topbar-left,
    .topbar-right {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .sidebar {
        position: fixed;
        left: -70px;
        transition: left 0.3s ease;
    }

    .sidebar.open {
        left: 0;
    }

    .main-container {
        margin-left: 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }
}

/* ====================================
   Utility Classes
   ==================================== */

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

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

.mt-2 {
    margin-top: 1rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.p-2 {
    padding: 1rem;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

.flex {
    display: flex;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ====================================
   Auth / Setup Pages
   ==================================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 60px rgba(0,0,0,.35);
}

.auth-card h2 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: rgba(255,255,255,0.03);
    color: var(--text-primary);
    outline: none;
}

.alert {
    padding: 0.9rem 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.alert-error {
    border-color: rgba(239,68,68,.5);
    background: rgba(239,68,68,.12);
}

.alert-success {
    border-color: rgba(16,185,129,.5);
    background: rgba(16,185,129,.12);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    font-weight: 600;
}

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

.btn-secondary {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.main-content {
    padding: 2rem;
}