/* Global Variables & Colors (Curated HSL Palette) */
:root {
    --bg-dark: hsl(222, 25%, 6%);
    --bg-card: hsla(222, 20%, 12%, 0.6);
    --bg-input: hsla(222, 20%, 8%, 0.8);
    --border-color: hsla(222, 100%, 100%, 0.08);
    
    --primary: hsl(262, 85%, 58%);
    --primary-hover: hsl(262, 85%, 68%);
    --primary-gradient: linear-gradient(135deg, hsl(262, 85%, 58%) 0%, hsl(290, 80%, 52%) 100%);
    --secondary-gradient: linear-gradient(135deg, hsl(316, 90%, 55%) 0%, hsl(340, 85%, 50%) 100%);
    --accent-glow: radial-gradient(circle, hsla(262, 85%, 58%, 0.15) 0%, rgba(0,0,0,0) 70%);
    
    --text-primary: hsl(0, 0%, 96%);
    --text-muted: hsl(220, 10%, 65%);
    --text-accent: hsl(290, 80%, 65%);
    
    --success: hsl(145, 80%, 42%);
    --danger: hsl(355, 80%, 50%);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --border-radius: 12px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

/* Typography Helper */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

/* Button Component */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 15px hsla(262, 85%, 58%, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px hsla(262, 85%, 58%, 0.45);
    background: linear-gradient(135deg, hsl(262, 85%, 63%) 0%, hsl(290, 80%, 57%) 100%);
}

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

.btn-success:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

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

.btn-outline:hover {
    background: hsla(0, 0%, 100%, 0.05);
    border-color: var(--text-primary);
}

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

.btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
}

/* Premium Navbar */
.navbar {
    background: hsla(222, 25%, 6%, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
}

.logo-icon {
    font-size: 1.6rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-accent {
    color: var(--text-accent);
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

.nav-admin {
    color: var(--text-accent);
    opacity: 0.8;
}

.nav-admin:hover {
    opacity: 1;
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: hsla(0, 0%, 100%, 0.05);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.page-content {
    min-height: calc(100vh - 160px);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 100px 24px 80px 24px;
    text-align: center;
}

.hero-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: var(--accent-glow);
    z-index: -1;
    pointer-events: none;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-description {
    color: var(--text-muted);
    font-size: 1.15rem;
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
}

.stat-card {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Courses Grid */
.courses-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    border-color: hsla(262, 85%, 58%, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.course-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 10;
    background: var(--secondary-gradient);
    color: #fff;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.course-thumb-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #000;
}

.course-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.course-thumb-container:hover .course-overlay {
    opacity: 1;
}

.course-body {
    padding: 24px;
}

.course-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.course-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    height: 60px;
    overflow: hidden;
    margin-bottom: 20px;
}

.course-meta {
    display: flex;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

/* Features/Legitimacy Section */
.features-section {
    border-top: 1px solid var(--border-color);
    padding: 60px 24px;
    background: hsla(0, 0%, 100%, 0.01);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

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

.feature-icon {
    font-size: 2.2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.feature-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Authentication Layout */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 80px 24px;
    position: relative;
}

.auth-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--accent-glow);
    z-index: -1;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
}

.auth-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.auth-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 30px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.input-container {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 12px 14px 12px 40px;
    border-radius: 8px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition);
}

.select-input {
    padding-left: 14px;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px hsla(262, 85%, 58%, 0.15);
}

.form-textarea {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 12px 14px;
    border-radius: 8px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    min-height: 100px;
    resize: vertical;
    transition: var(--transition);
}

.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.input-help {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.auth-link {
    color: var(--text-accent);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: hsl(355, 90%, 65%);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: hsl(145, 80%, 55%);
}

/* Personal Cabinet Dashboard */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 30px;
    padding: 40px 24px;
}

.dashboard-sidebar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-self: start;
}

.sidebar-block {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.block-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.course-list, .video-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.course-select-item {
    padding: 10px 12px;
    border-radius: 8px;
    background: hsla(0, 0%, 100%, 0.02);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.course-select-item:hover, .course-select-item.active {
    background: hsla(262, 85%, 58%, 0.08);
    border-color: var(--primary);
}

.course-select-title {
    font-size: 0.85rem;
    font-weight: 600;
}

.course-select-category {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.video-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 6px;
    transition: var(--transition);
}

.video-item.active {
    background: hsla(0, 0%, 100%, 0.05);
}

.video-item-link {
    display: flex;
    gap: 6px;
    flex: 1;
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-item.active .video-item-link {
    color: var(--text-primary);
    font-weight: 500;
}

.video-title-text {
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Custom Checkbox */
.checkbox-container {
    display: block;
    position: relative;
    width: 18px;
    height: 18px;
    cursor: pointer;
    user-select: none;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 18px;
    width: 18px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.checkbox-container:hover input ~ .checkmark {
    background-color: hsla(0, 0%, 100%, 0.1);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--success);
    border-color: var(--success);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 6px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Dashboard Stage (Player) */
.dashboard-stage {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.video-player-container {
    width: 100%;
    background: #000;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    aspect-ratio: 16/9;
}

.video-player {
    width: 100%;
    height: 100%;
    display: block;
}

.video-details {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
}

.details-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
}

.stage-video-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
}

.stage-video-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.security-disclaimer {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: rgba(168, 85, 247, 0.05);
    border: 1px dashed rgba(168, 85, 247, 0.2);
    border-radius: 8px;
    font-size: 0.75rem;
    color: var(--text-accent);
}

.empty-stage {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 80px 40px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.empty-icon {
    font-size: 3rem;
    color: var(--text-muted);
    opacity: 0.4;
}

/* Administration Layout */
.admin-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px;
}

.admin-header {
    margin-bottom: 30px;
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
}

.admin-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.admin-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Premium Footer */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-dark);
    padding: 40px 24px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.social-link {
    font-size: 1.2rem;
    color: var(--text-muted);
}

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

/* Responsive Scaling */
@media(max-width: 868px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
}