/* style.css - Dark Purple Vibrant Theme */

:root {
    --primary-dark: #1a0a2e;
    --primary-purple: #4a1c6f;
    --primary-vibrant: #7c3aed;
    --primary-bright: #a855f7;
    --accent-pink: #ec4899;
    --accent-cyan: #06b6d4;
    --text-white: #ffffff;
    --text-light: #e9d5ff;
    --text-dim: #a78bfa;
    --bg-dark: #0f0518;
    --bg-card: #1e0b36;
    --bg-hover: #2d1b4e;
    --border-color: #4c1d95;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --sidebar-width: 280px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-purple) 50%, var(--bg-dark) 100%);
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 2rem;
}

.login-box {
    background: rgba(30, 11, 54, 0.9);
    backdrop-filter: blur(10px);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem 2rem;
    box-shadow: 0 20px 60px rgba(124, 58, 237, 0.3);
}

.login-box h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-bright), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    text-align: center;
    color: var(--text-dim);
    margin-bottom: 2rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-light);
    font-weight: 600;
}

.form-group input {
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-dark);
    color: var(--text-white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-bright);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
}

.login-note {
    margin-top: 2rem;
    padding: 1rem;
    background: rgba(124, 58, 237, 0.1);
    border-radius: 10px;
    border-left: 4px solid var(--primary-vibrant);
}

.login-note p {
    color: var(--text-dim);
    font-size: 0.875rem;
    margin: 0.25rem 0;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-vibrant), var(--primary-bright));
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.6);
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-light);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--primary-purple);
    border-color: var(--primary-bright);
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

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

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

.btn-logout {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border: 1px solid var(--danger);
    margin-top: 1rem;
}

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

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--danger);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid var(--success);
    color: #6ee7b7;
}

/* Dashboard Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: var(--sidebar-width);
    background: rgba(30, 11, 54, 0.95);
    border-right: 2px solid var(--border-color);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar a,
.sidebar button {
    min-height: 44px;
}

/* Hamburger toggle button */
.sidebar-toggle {
    display: none;
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 8px;
    line-height: 1;
    z-index: 1010;
}

.sidebar-toggle:hover {
    background: rgba(255,255,255,0.1);
}

/* Mobile hamburger button (shown inside .main-content top-bar on mobile) */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    margin-right: 0.75rem;
    border-radius: 8px;
    vertical-align: middle;
}

.mobile-menu-btn:hover {
    background: rgba(255,255,255,0.1);
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 999;
}

.sidebar-overlay.active {
    display: block;
}

.sidebar-header {
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
}

.sidebar-header h2 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-bright), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.role-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 0.5rem;
}

.role-student {
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
}

.role-teacher {
    background: rgba(236, 72, 153, 0.2);
    color: var(--accent-pink);
    border: 1px solid var(--accent-pink);
}

.role-admin {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    padding: 0.875rem 1rem;
    border-radius: 10px;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-white);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-vibrant), var(--primary-purple));
    color: var(--text-white);
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-vibrant), var(--accent-pink));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.user-details {
    flex: 1;
}

.user-name {
    font-weight: 600;
    color: var(--text-white);
    font-size: 0.875rem;
}

.user-email {
    font-size: 0.75rem;
    color: var(--text-dim);
    word-break: break-word;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 2rem;
    min-width: 0;
}

.top-bar {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.top-bar h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--text-white), var(--text-dim));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    flex: 1;
}

.content-area {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.dashboard-section {
    background: rgba(30, 11, 54, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
}

.section-card {
    background: rgba(30, 11, 54, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.section-desc {
    color: var(--text-dim);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-row.single {
    grid-template-columns: 1fr;
}

.form-row .form-group {
    min-width: 0;
}

.form-row input,
.form-row select,
.form-row textarea,
.login-form input,
.login-form select,
.login-form textarea {
    width: 100%;
    max-width: 100%;
}

.download-option {
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
}

.download-option label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
}

.download-info {
    color: var(--text-dim);
    margin-top: 0.75rem;
    font-size: 0.875rem;
    line-height: 1.5;
}

.bcdn-select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-dark);
    color: var(--text-white);
    font-size: 1rem;
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.dashboard-section h2 {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-size: 1.5rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-purple), var(--bg-card));
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.4);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-bright), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-dim);
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.stat-warning .stat-value {
    background: linear-gradient(135deg, var(--warning), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Courses Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-card {
    background: linear-gradient(135deg, var(--bg-card), var(--primary-purple));
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.4);
    border-color: var(--primary-bright);
}

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

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

.access-code {
    background: rgba(124, 58, 237, 0.3);
    color: var(--primary-bright);
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: monospace;
}

.course-description {
    color: var(--text-dim);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    line-height: 1.5;
}

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

.course-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.action-card {
    background: linear-gradient(135deg, var(--primary-purple), var(--bg-card));
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    text-decoration: none;
    color: var(--text-light);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.action-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-bright);
    color: var(--text-white);
}

.action-icon {
    font-size: 2rem;
}

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

.empty-state p {
    margin-bottom: 1.5rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    min-width: 640px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

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

.data-table th {
    background: rgba(124, 58, 237, 0.2);
    color: var(--text-light);
    font-weight: 600;
}

.data-table tr:hover {
    background: rgba(124, 58, 237, 0.1);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-student {
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-cyan);
}

.badge-teacher {
    background: rgba(236, 72, 153, 0.2);
    color: var(--accent-pink);
}

.badge-admin {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.badge-pending {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

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

.badge-rejected {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

/* Role Stats */
.role-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.role-stat-item {
    background: rgba(124, 58, 237, 0.2);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
}

.role-name {
    color: var(--text-light);
    font-weight: 600;
}

.role-count {
    background: var(--primary-vibrant);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-weight: 700;
}

/* Video Player */
.video-container {
    position: relative;
    background: #000;
    border-radius: 15px;
    overflow: hidden;
}

.video-container iframe,
.video-container video {
    width: 100%;
    height: 100%;
    display: block;
}

/* Lessons List */
.lessons-list .lesson-item {
    padding: 1rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    color: var(--text-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.lessons-list .lesson-item.active {
    background: rgba(124,58,237,0.3);
}

.lessons-list .lesson-item:not(.active) {
    background: rgba(124,58,237,0.1);
}

/* ===== RESPONSIVE ===== */

/* Tablet */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }

    .main-content {
        margin-left: 240px;
        padding: 1.5rem;
    }

    .courses-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
}

/* Mobile */
@media (max-width: 768px) {
    /* Sidebar hidden by default, slides in */
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
        max-width: 80vw;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .mobile-menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .app-container {
        flex-direction: column;
    }

    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

    .top-bar {
        flex-wrap: nowrap;
    }

    .top-bar h1 {
        font-size: 1.25rem;
        line-height: 1.25;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .dashboard-section,
    .section-card,
    .login-box {
        padding: 1rem;
    }

    .stats-grid,
    .courses-grid,
    .quick-actions,
    .form-row {
        grid-template-columns: 1fr;
    }

    .course-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .course-actions,
    .hero-btns,
    .role-stats {
        flex-direction: column;
    }

    .course-actions .btn,
    .hero-btns .btn,
    .role-stats .role-stat-item,
    .btn-full {
        width: 100%;
    }

    .course-meta {
        gap: 0.5rem;
    }

    .course-meta span {
        display: inline-flex;
        width: 100%;
    }

    .table-container {
        margin: 0 -1rem;
        padding: 0 1rem;
    }

    .data-table {
        min-width: 560px;
    }

    .role-tabs {
        flex-direction: column;
    }

    .role-tab:first-child {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .login-container {
        padding: 1rem;
    }

    .login-box h1 {
        font-size: 2rem;
    }

    /* Fix lesson items on mobile */
    .lessons-list .lesson-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .lessons-list .lesson-item > div:last-child {
        width: 100%;
        justify-content: flex-start !important;
    }

    /* Make inline button groups stack */
    [style*="display:flex"]:not(.sidebar):not(.main-content):not(.app-container):not(.sidebar-nav):not(.top-bar) {
        flex-wrap: wrap;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .sidebar-header h2 {
        font-size: 1.5rem;
    }

    .nav-item {
        padding: 0.8rem 0.9rem;
        font-size: 0.95rem;
    }

    .top-bar h1 {
        font-size: 1.1rem;
    }

    .login-box {
        border-radius: 16px;
    }

    .login-box h1 {
        font-size: 1.75rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .role-stat-item,
    .stat-card,
    .course-card,
    .action-card {
        padding: 1rem;
    }

    .section-title {
        font-size: 1.25rem;
    }

    .dashboard-section h2 {
        font-size: 1.25rem;
    }

    .stat-value {
        font-size: 2rem;
    }

    .sidebar {
        max-width: 85vw;
    }
}