/*
Theme Name: SkillNuke Dark
Theme URI: https://skillnuke.com
Author: SkillNuke Team
Description: Modern dark-themed AI learning platform. Integrates with Tutor LMS. Features AI Twin, sandbox environments, and creator monetization.
Version: 2.0.0
License: GPL v2
Text Domain: skillnuke
Requires at least: 6.0
Requires PHP: 7.4
*/

/* ============================================
   SKILLNUKE DARK THEME - COMPLETE DESIGN SYSTEM
   Dark, tech-savvy, modern aesthetic
   ============================================ */

:root {
    /* Primary Palette - Dark & Electric */
    --sk-bg-primary: #0a0a0f;
    --sk-bg-secondary: #111118;
    --sk-bg-tertiary: #1a1a24;
    --sk-bg-card: #13131c;
    --sk-bg-hover: #1e1e2e;
    --sk-bg-input: #0f0f17;

    /* Accent Colors - Neon/Cyber */
    --sk-accent-cyan: #00d4ff;
    --sk-accent-purple: #a855f7;
    --sk-accent-green: #22c55e;
    --sk-accent-amber: #f59e0b;
    --sk-accent-pink: #ec4899;
    --sk-accent-blue: #3b82f6;

    /* Gradients */
    --sk-gradient-primary: linear-gradient(135deg, #00d4ff 0%, #a855f7 100%);
    --sk-gradient-glow: linear-gradient(135deg, rgba(0,212,255,0.15) 0%, rgba(168,85,247,0.15) 100%);
    --sk-gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #111118 100%);
    --sk-gradient-card: linear-gradient(145deg, #13131c 0%, #1a1a24 100%);

    /* Text Colors */
    --sk-text-primary: #f8fafc;
    --sk-text-secondary: #94a3b8;
    --sk-text-muted: #64748b;
    --sk-text-dark: #475569;

    /* Borders */
    --sk-border: rgba(148, 163, 184, 0.1);
    --sk-border-hover: rgba(0, 212, 255, 0.3);
    --sk-border-glow: 0 0 20px rgba(0, 212, 255, 0.15);

    /* Shadows */
    --sk-shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --sk-shadow: 0 4px 6px -1px rgba(0,0,0,0.4);
    --sk-shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.5);
    --sk-shadow-glow: 0 0 30px rgba(0, 212, 255, 0.2);

    /* Spacing */
    --sk-radius-sm: 8px;
    --sk-radius: 12px;
    --sk-radius-lg: 16px;
    --sk-radius-xl: 24px;

    /* Typography */
    --sk-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --sk-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --sk-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Selection */
::selection {
    background: rgba(0, 212, 255, 0.3);
    color: var(--sk-text-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--sk-bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--sk-border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--sk-accent-cyan);
}

/* Container */
.sk-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.sk-container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--sk-text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

.sk-section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--sk-accent-cyan);
    margin-bottom: 16px;
}

.sk-section-label::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--sk-gradient-primary);
    border-radius: 2px;
}

.sk-section-desc {
    font-size: 1.125rem;
    color: var(--sk-text-secondary);
    max-width: 600px;
}

/* ============================================
   BUTTONS
   ============================================ */
.sk-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--sk-radius);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    transition: var(--sk-transition);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.sk-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.sk-btn:hover::before {
    opacity: 1;
}

.sk-btn-primary {
    background: var(--sk-gradient-primary);
    color: var(--sk-bg-primary);
    border: none;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

.sk-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.sk-btn-secondary {
    background: transparent;
    color: var(--sk-accent-cyan);
    border-color: var(--sk-accent-cyan);
}

.sk-btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.sk-btn-ghost {
    background: var(--sk-bg-tertiary);
    color: var(--sk-text-primary);
    border-color: var(--sk-border);
}

.sk-btn-ghost:hover {
    border-color: var(--sk-accent-cyan);
    background: var(--sk-bg-hover);
}

.sk-btn-glow {
    background: var(--sk-gradient-primary);
    color: var(--sk-bg-primary);
    border: none;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 30px rgba(0, 212, 255, 0.4); }
    50% { box-shadow: 0 0 50px rgba(0, 212, 255, 0.6); }
}

.sk-btn-small {
    padding: 10px 20px;
    font-size: 0.875rem;
}

.sk-btn-large {
    padding: 18px 36px;
    font-size: 1rem;
}

/* ============================================
   BADGES & TAGS
   ============================================ */
.sk-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sk-badge-cyan {
    background: rgba(0, 212, 255, 0.15);
    color: var(--sk-accent-cyan);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.sk-badge-purple {
    background: rgba(168, 85, 247, 0.15);
    color: var(--sk-accent-purple);
    border: 1px solid rgba(168, 85, 247, 0.3);
}

.sk-badge-green {
    background: rgba(34, 197, 94, 0.15);
    color: var(--sk-accent-green);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.sk-badge-amber {
    background: rgba(245, 158, 11, 0.15);
    color: var(--sk-accent-amber);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ============================================
   CARDS
   ============================================ */
.sk-card {
    background: var(--sk-gradient-card);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-lg);
    padding: 32px;
    transition: var(--sk-transition);
    position: relative;
    overflow: hidden;
}

.sk-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--sk-accent-cyan), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.sk-card:hover {
    border-color: var(--sk-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--sk-shadow-glow);
}

.sk-card:hover::before {
    opacity: 1;
}

.sk-card-featured {
    border-color: var(--sk-accent-cyan);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
}

.sk-card-featured::after {
    content: 'MOST POPULAR';
    position: absolute;
    top: 16px;
    right: -32px;
    background: var(--sk-gradient-primary);
    color: var(--sk-bg-primary);
    padding: 4px 40px;
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    transform: rotate(45deg);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.sk-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--sk-border);
    transition: var(--sk-transition);
}

.sk-header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    box-shadow: var(--sk-shadow-lg);
}

.sk-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.sk-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.sk-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--sk-gradient-primary);
    border-radius: var(--sk-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--sk-bg-primary);
}

.sk-logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--sk-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sk-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sk-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.sk-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--sk-text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--sk-radius-sm);
    transition: var(--sk-transition);
}

.sk-menu a:hover,
.sk-menu a.active {
    color: var(--sk-accent-cyan);
    background: rgba(0, 212, 255, 0.08);
}

.sk-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.sk-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.sk-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--sk-text-primary);
    transition: var(--sk-transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.sk-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.sk-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.sk-hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(168, 85, 247, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(34, 197, 94, 0.05) 0%, transparent 50%);
}

.sk-hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.sk-hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.sk-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--sk-accent-cyan);
    margin-bottom: 24px;
    animation: fade-in-up 0.6s ease-out;
}

.sk-hero-badge .sk-dot {
    width: 8px;
    height: 8px;
    background: var(--sk-accent-cyan);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.sk-hero h1 {
    margin-bottom: 24px;
    animation: fade-in-up 0.6s ease-out 0.1s both;
}

.sk-hero h1 .sk-gradient-text {
    background: var(--sk-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sk-hero-description {
    font-size: 1.25rem;
    color: var(--sk-text-secondary);
    margin-bottom: 40px;
    max-width: 560px;
    animation: fade-in-up 0.6s ease-out 0.2s both;
}

.sk-hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
    animation: fade-in-up 0.6s ease-out 0.3s both;
}

.sk-hero-stats {
    display: flex;
    gap: 48px;
    animation: fade-in-up 0.6s ease-out 0.4s both;
}

.sk-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sk-stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: var(--sk-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sk-stat-label {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
}

.sk-hero-visual {
    position: absolute;
    right: -5%;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    max-width: 600px;
    z-index: 1;
}

.sk-hero-visual img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 0 40px rgba(0, 212, 255, 0.2));
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   TRUSTED BY SECTION
   ============================================ */
.sk-trusted {
    padding: 60px 0;
    border-bottom: 1px solid var(--sk-border);
    position: relative;
}

.sk-trusted::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--sk-accent-cyan), transparent);
    opacity: 0.3;
}

.sk-trusted-label {
    text-align: center;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--sk-text-muted);
    margin-bottom: 32px;
}

.sk-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 64px;
    flex-wrap: wrap;
}

.sk-logo-item {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 32px;
    opacity: 0.5;
    filter: grayscale(100%) brightness(2);
    transition: var(--sk-transition);
}

.sk-logo-item:hover {
    opacity: 1;
    filter: grayscale(0%) brightness(1);
}

.sk-logo-item img {
    max-height: 100%;
    width: auto;
}

.sk-logo-fallback {
    font-weight: 700;
    color: var(--sk-text-muted);
    font-size: 1rem;
    letter-spacing: 0.05em;
}

/* ============================================
   FEATURES SECTION
   ============================================ */
.sk-features {
    padding: 120px 0;
    position: relative;
}

.sk-features-header {
    text-align: center;
    margin-bottom: 80px;
}

.sk-features-header h2 {
    margin-bottom: 16px;
}

.sk-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sk-feature-card {
    background: var(--sk-gradient-card);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-lg);
    padding: 40px 32px;
    transition: var(--sk-transition);
    position: relative;
    overflow: hidden;
}

.sk-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--sk-gradient-primary);
    opacity: 0;
    transition: opacity 0.3s;
}

.sk-feature-card:hover {
    border-color: var(--sk-border-hover);
    transform: translateY(-8px);
    box-shadow: var(--sk-shadow-glow);
}

.sk-feature-card:hover::before {
    opacity: 1;
}

.sk-feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--sk-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 24px;
    background: var(--sk-gradient-glow);
    border: 1px solid var(--sk-border-hover);
}

.sk-feature-card h4 {
    font-size: 1.125rem;
    margin-bottom: 12px;
}

.sk-feature-card p {
    font-size: 0.9375rem;
    color: var(--sk-text-secondary);
    line-height: 1.6;
}

/* ============================================
   COURSES SECTION
   ============================================ */
.sk-courses {
    padding: 120px 0;
    background: var(--sk-bg-secondary);
    position: relative;
}

.sk-courses-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 64px;
}

.sk-courses-header-left h2 {
    margin-bottom: 16px;
}

.sk-course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

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

.sk-course-card:hover {
    border-color: var(--sk-border-hover);
    transform: translateY(-8px);
    box-shadow: var(--sk-shadow-glow);
}

.sk-course-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a24 0%, #0a0a0f 100%);
}

.sk-course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.sk-course-card:hover .sk-course-image img {
    transform: scale(1.05);
}

.sk-course-level {
    position: absolute;
    top: 16px;
    left: 16px;
}

.sk-course-sandbox {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--sk-accent-green);
}

.sk-course-info {
    padding: 24px;
}

.sk-course-meta-top {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.sk-course-instructor {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--sk-text-secondary);
}

.sk-course-instructor img {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.sk-course-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.875rem;
    color: var(--sk-accent-amber);
}

.sk-course-info h3 {
    font-size: 1.125rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.sk-course-info h3 a {
    color: var(--sk-text-primary);
    text-decoration: none;
    transition: color 0.3s;
}

.sk-course-info h3 a:hover {
    color: var(--sk-accent-cyan);
}

.sk-course-info p {
    font-size: 0.9375rem;
    color: var(--sk-text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.sk-course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--sk-border);
}

.sk-course-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.sk-price-current {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--sk-accent-cyan);
}

.sk-price-original {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
    text-decoration: line-through;
}

.sk-course-duration {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ============================================
   AI TWIN SECTION
   ============================================ */
.sk-twin {
    padding: 120px 0;
    position: relative;
    overflow: hidden;
}

.sk-twin::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.sk-twin-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.sk-twin-visual {
    position: relative;
}

.sk-twin-orbit {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    border: 1px solid var(--sk-border);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sk-twin-core {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--sk-gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.4);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.sk-twin-satellite {
    position: absolute;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--sk-bg-tertiary);
    border: 1px solid var(--sk-border-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

.sk-twin-satellite:nth-child(2) { top: 10%; left: 50%; transform: translateX(-50%); }
.sk-twin-satellite:nth-child(3) { top: 50%; right: 10%; transform: translateY(-50%); }
.sk-twin-satellite:nth-child(4) { bottom: 10%; left: 50%; transform: translateX(-50%); }
.sk-twin-satellite:nth-child(5) { top: 50%; left: 10%; transform: translateY(-50%); }

.sk-twin-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.sk-twin-feature {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--sk-bg-tertiary);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius);
    transition: var(--sk-transition);
}

.sk-twin-feature:hover {
    border-color: var(--sk-border-hover);
    background: var(--sk-bg-hover);
}

.sk-twin-feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--sk-radius-sm);
    background: var(--sk-gradient-glow);
    border: 1px solid var(--sk-border-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.sk-twin-feature-text h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.sk-twin-feature-text p {
    font-size: 0.875rem;
    color: var(--sk-text-secondary);
}

/* ============================================
   SANDBOX SECTION
   ============================================ */
.sk-sandbox {
    padding: 120px 0;
    background: var(--sk-bg-secondary);
    position: relative;
}

.sk-sandbox-demo {
    background: var(--sk-bg-primary);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-xl);
    overflow: hidden;
    margin-top: 48px;
    box-shadow: var(--sk-shadow-lg);
}

.sk-sandbox-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--sk-bg-tertiary);
    border-bottom: 1px solid var(--sk-border);
}

.sk-sandbox-dots {
    display: flex;
    gap: 8px;
}

.sk-sandbox-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.sk-sandbox-dot-red { background: #ef4444; }
.sk-sandbox-dot-yellow { background: #f59e0b; }
.sk-sandbox-dot-green { background: #22c55e; }

.sk-sandbox-title {
    font-size: 0.875rem;
    color: var(--sk-text-secondary);
    font-family: var(--sk-font-mono);
}

.sk-sandbox-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 400px;
}

.sk-sandbox-editor {
    padding: 24px;
    border-right: 1px solid var(--sk-border);
    font-family: var(--sk-font-mono);
    font-size: 0.875rem;
    line-height: 1.8;
    color: var(--sk-text-secondary);
}

.sk-sandbox-editor .sk-code-keyword { color: var(--sk-accent-purple); }
.sk-sandbox-editor .sk-code-string { color: var(--sk-accent-green); }
.sk-sandbox-editor .sk-code-function { color: var(--sk-accent-cyan); }
.sk-sandbox-editor .sk-code-comment { color: var(--sk-text-muted); }

.sk-sandbox-output {
    padding: 24px;
    background: var(--sk-bg-tertiary);
}

.sk-sandbox-output-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--sk-text-muted);
    margin-bottom: 16px;
}

.sk-sandbox-result {
    padding: 16px;
    background: var(--sk-bg-primary);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-sm);
    font-family: var(--sk-font-mono);
    font-size: 0.875rem;
    color: var(--sk-accent-green);
}

/* ============================================
   PRICING PAGE
   ============================================ */
.sk-pricing-hero {
    padding: 160px 0 80px;
    text-align: center;
    position: relative;
}

.sk-pricing-hero h1 {
    margin-bottom: 20px;
}

.sk-pricing-hero > p {
    font-size: 1.25rem;
    color: var(--sk-text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
}

.sk-pricing-toggle {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    padding: 6px;
    background: var(--sk-bg-tertiary);
    border: 1px solid var(--sk-border);
    border-radius: 100px;
    margin-bottom: 64px;
}

.sk-pricing-toggle button {
    padding: 10px 24px;
    border-radius: 100px;
    border: none;
    background: none;
    color: var(--sk-text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--sk-transition);
}

.sk-pricing-toggle button.active {
    background: var(--sk-gradient-primary);
    color: var(--sk-bg-primary);
}

.sk-pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.sk-pricing-card {
    background: var(--sk-gradient-card);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-xl);
    padding: 40px 32px;
    transition: var(--sk-transition);
    position: relative;
    overflow: hidden;
}

.sk-pricing-card:hover {
    border-color: var(--sk-border-hover);
    transform: translateY(-8px);
    box-shadow: var(--sk-shadow-glow);
}

.sk-pricing-card-featured {
    border-color: var(--sk-accent-cyan);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.15);
    transform: scale(1.05);
}

.sk-pricing-card-featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.sk-pricing-card-header {
    margin-bottom: 32px;
}

.sk-pricing-card-header h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.sk-pricing-card-header p {
    font-size: 0.9375rem;
    color: var(--sk-text-secondary);
}

.sk-pricing-price {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--sk-border);
}

.sk-pricing-price-amount {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    background: var(--sk-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sk-pricing-price-period {
    font-size: 1rem;
    color: var(--sk-text-muted);
}

.sk-pricing-price-note {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
    margin-top: 8px;
}

.sk-pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.sk-pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 0.9375rem;
    color: var(--sk-text-secondary);
    border-bottom: 1px solid rgba(148, 163, 184, 0.05);
}

.sk-pricing-features li .sk-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(34, 197, 94, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sk-accent-green);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.sk-pricing-features li .sk-check-missing {
    background: rgba(148, 163, 184, 0.1);
    color: var(--sk-text-muted);
}

.sk-pricing-card .sk-btn {
    width: 100%;
}

/* Creator Pricing Section */
.sk-creator-pricing {
    padding: 120px 0;
    background: var(--sk-bg-secondary);
}

.sk-creator-pricing-header {
    text-align: center;
    margin-bottom: 64px;
}

.sk-creator-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.sk-creator-card {
    background: var(--sk-gradient-card);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-xl);
    padding: 48px 40px;
    text-align: center;
    transition: var(--sk-transition);
}

.sk-creator-card:hover {
    border-color: var(--sk-border-hover);
    transform: translateY(-4px);
}

.sk-creator-card .sk-icon-large {
    width: 80px;
    height: 80px;
    border-radius: var(--sk-radius-lg);
    background: var(--sk-gradient-glow);
    border: 1px solid var(--sk-border-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 24px;
}

.sk-creator-card h3 {
    margin-bottom: 16px;
}

.sk-creator-card p {
    color: var(--sk-text-secondary);
    margin-bottom: 24px;
}

.sk-revenue-split {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin: 32px 0;
    padding: 24px;
    background: var(--sk-bg-primary);
    border-radius: var(--sk-radius);
    border: 1px solid var(--sk-border);
}

.sk-revenue-you {
    text-align: center;
}

.sk-revenue-you .sk-percent {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--sk-accent-green);
}

.sk-revenue-you .sk-label {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
}

.sk-revenue-divider {
    width: 1px;
    height: 60px;
    background: var(--sk-border);
}

.sk-revenue-platform {
    text-align: center;
}

.sk-revenue-platform .sk-percent {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--sk-accent-cyan);
}

.sk-revenue-platform .sk-label {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
}

/* ============================================
   FAQ SECTION
   ============================================ */
.sk-faq {
    padding: 120px 0;
    position: relative;
}

.sk-faq-header {
    text-align: center;
    margin-bottom: 64px;
}

.sk-faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.sk-faq-item {
    background: var(--sk-gradient-card);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--sk-transition);
}

.sk-faq-item:hover {
    border-color: var(--sk-border-hover);
}

.sk-faq-item.active {
    border-color: var(--sk-border-hover);
    box-shadow: var(--sk-shadow-glow);
}

.sk-faq-question {
    width: 100%;
    padding: 24px 32px;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--sk-text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.3s;
    font-family: var(--sk-font-body);
}

.sk-faq-question:hover {
    color: var(--sk-accent-cyan);
}

.sk-faq-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--sk-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--sk-accent-cyan);
    transition: transform 0.3s, background 0.3s;
    flex-shrink: 0;
}

.sk-faq-item.active .sk-faq-icon {
    transform: rotate(45deg);
    background: rgba(0, 212, 255, 0.2);
}

.sk-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.sk-faq-item.active .sk-faq-answer {
    max-height: 500px;
}

.sk-faq-answer-inner {
    padding: 0 32px 24px;
    color: var(--sk-text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ============================================
   TESTIMONIALS
   ============================================ */
.sk-testimonials {
    padding: 120px 0;
    background: var(--sk-bg-secondary);
}

.sk-testimonials-header {
    text-align: center;
    margin-bottom: 64px;
}

.sk-testimonial-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.sk-testimonial {
    background: var(--sk-gradient-card);
    border: 1px solid var(--sk-border);
    border-radius: var(--sk-radius-lg);
    padding: 32px;
    transition: var(--sk-transition);
}

.sk-testimonial:hover {
    border-color: var(--sk-border-hover);
    transform: translateY(-4px);
}

.sk-testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
}

.sk-testimonial-stars svg {
    width: 20px;
    height: 20px;
    fill: var(--sk-accent-amber);
}

.sk-testimonial blockquote {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--sk-text-secondary);
    margin-bottom: 24px;
    font-style: italic;
}

.sk-testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sk-testimonial-author img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--sk-border);
}

.sk-testimonial-author-info {
    display: flex;
    flex-direction: column;
}

.sk-testimonial-author-info strong {
    color: var(--sk-text-primary);
    font-size: 0.9375rem;
}

.sk-testimonial-author-info span {
    color: var(--sk-text-muted);
    font-size: 0.8125rem;
}

/* ============================================
   CTA SECTION
   ============================================ */
.sk-cta {
    padding: 120px 0;
    position: relative;
    overflow: hidden;
}

.sk-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(168, 85, 247, 0.1) 0%, transparent 50%);
}

.sk-cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.sk-cta h2 {
    margin-bottom: 20px;
}

.sk-cta > p {
    font-size: 1.125rem;
    color: var(--sk-text-secondary);
    margin-bottom: 40px;
}

.sk-cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */
.sk-footer {
    padding: 80px 0 40px;
    background: var(--sk-bg-secondary);
    border-top: 1px solid var(--sk-border);
    position: relative;
}

.sk-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--sk-accent-cyan), transparent);
    opacity: 0.3;
}

.sk-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 64px;
}

.sk-footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    background: var(--sk-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sk-footer-brand p {
    color: var(--sk-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 24px;
}

.sk-social {
    display: flex;
    gap: 12px;
}

.sk-social a {
    width: 40px;
    height: 40px;
    border-radius: var(--sk-radius-sm);
    background: var(--sk-bg-tertiary);
    border: 1px solid var(--sk-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sk-text-secondary);
    text-decoration: none;
    transition: var(--sk-transition);
}

.sk-social a:hover {
    border-color: var(--sk-accent-cyan);
    color: var(--sk-accent-cyan);
    background: rgba(0, 212, 255, 0.1);
}

.sk-footer-links h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--sk-text-primary);
    margin-bottom: 20px;
}

.sk-footer-links ul {
    list-style: none;
}

.sk-footer-links li {
    margin-bottom: 12px;
}

.sk-footer-links a {
    color: var(--sk-text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: color 0.3s;
}

.sk-footer-links a:hover {
    color: var(--sk-accent-cyan);
}

.sk-footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--sk-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.sk-footer-bottom p {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
}

.sk-footer-legal {
    display: flex;
    gap: 24px;
}

.sk-footer-legal a {
    font-size: 0.875rem;
    color: var(--sk-text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.sk-footer-legal a:hover {
    color: var(--sk-accent-cyan);
}

/* ============================================
   TUTOR LMS INTEGRATION STYLES
   ============================================ */

/* Override Tutor default colors */
.tutor-course-listing-item {
    background: var(--sk-gradient-card) !important;
    border: 1px solid var(--sk-border) !important;
    border-radius: var(--sk-radius-lg) !important;
    overflow: hidden;
}

.tutor-course-listing-item:hover {
    border-color: var(--sk-border-hover) !important;
    box-shadow: var(--sk-shadow-glow) !important;
}

.tutor-course-thumbnail img {
    transition: transform 0.5s;
}

.tutor-course-listing-item:hover .tutor-course-thumbnail img {
    transform: scale(1.05);
}

.tutor-course-name a {
    color: var(--sk-text-primary) !important;
    font-weight: 600;
}

.tutor-course-name a:hover {
    color: var(--sk-accent-cyan) !important;
}

.tutor-meta span,
.tutor-course-loop-meta span {
    color: var(--sk-text-secondary) !important;
}

.tutor-course-loop-price {
    color: var(--sk-accent-cyan) !important;
    font-weight: 700;
}

.tutor-btn-primary {
    background: var(--sk-gradient-primary) !important;
    border: none !important;
    color: var(--sk-bg-primary) !important;
    border-radius: var(--sk-radius) !important;
    font-weight: 600 !important;
}

.tutor-btn-primary:hover {
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4) !important;
}

.tutor-course-details-tab {
    background: var(--sk-bg-card) !important;
    border: 1px solid var(--sk-border) !important;
}

.tutor-nav-link {
    color: var(--sk-text-secondary) !important;
}

.tutor-nav-link.is-active {
    color: var(--sk-accent-cyan) !important;
    border-bottom-color: var(--sk-accent-cyan) !important;
}

.tutor-single-course-sidebar .tutor-card {
    background: var(--sk-gradient-card) !important;
    border: 1px solid var(--sk-border) !important;
}

.tutor-course-details-widget {
    background: var(--sk-bg-tertiary) !important;
    border: 1px solid var(--sk-border) !important;
    border-radius: var(--sk-radius) !important;
}

.tutor-course-details-widget-title {
    color: var(--sk-text-primary) !important;
}

.tutor-course-details-widget-list li {
    color: var(--sk-text-secondary) !important;
    border-bottom-color: var(--sk-border) !important;
}

.tutor-course-details-widget-list li span:first-child {
    color: var(--sk-text-muted) !important;
}

/* Lesson/Topic styling */
.tutor-accordion-item-header {
    background: var(--sk-bg-tertiary) !important;
    border: 1px solid var(--sk-border) !important;
    color: var(--sk-text-primary) !important;
}

.tutor-accordion-item-header:hover {
    border-color: var(--sk-border-hover) !important;
}

.tutor-accordion-item-body {
    background: var(--sk-bg-primary) !important;
    border: 1px solid var(--sk-border) !important;
    border-top: none !important;
}

.tutor-course-topic-item {
    color: var(--sk-text-secondary) !important;
}

.tutor-course-topic-item:hover {
    color: var(--sk-accent-cyan) !important;
    background: rgba(0, 212, 255, 0.05) !important;
}

/* Dashboard */
.tutor-dashboard-menu li a {
    color: var(--sk-text-secondary) !important;
}

.tutor-dashboard-menu li.active a,
.tutor-dashboard-menu li a:hover {
    color: var(--sk-accent-cyan) !important;
    background: rgba(0, 212, 255, 0.08) !important;
}

.tutor-dashboard-content {
    background: var(--sk-gradient-card) !important;
    border: 1px solid var(--sk-border) !important;
}

/* Quiz styling */
.tutor-quiz-attempt-details,
.tutor-quiz-question-ans-choice {
    background: var(--sk-bg-tertiary) !important;
    border: 1px solid var(--sk-border) !important;
    color: var(--sk-text-primary) !important;
}

.tutor-quiz-question-ans-choice:hover {
    border-color: var(--sk-border-hover) !important;
}

/* Instructor profile */
.tutor-instructor-profile-card {
    background: var(--sk-gradient-card) !important;
    border: 1px solid var(--sk-border) !important;
}

.tutor-instructor-name a {
    color: var(--sk-text-primary) !important;
}

/* Forms */
.tutor-form-group input,
.tutor-form-group textarea,
.tutor-form-group select {
    background: var(--sk-bg-input) !important;
    border: 1px solid var(--sk-border) !important;
    color: var(--sk-text-primary) !important;
    border-radius: var(--sk-radius-sm) !important;
}

.tutor-form-group input:focus,
.tutor-form-group textarea:focus {
    border-color: var(--sk-accent-cyan) !important;
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1) !important;
}

.tutor-form-group label {
    color: var(--sk-text-secondary) !important;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .sk-hero-visual {
        display: none;
    }

    .sk-feature-grid,
    .sk-course-grid,
    .sk-pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .sk-twin-grid,
    .sk-sandbox-body {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sk-header-inner {
        height: 64px;
    }

    .sk-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--sk-bg-primary);
        border-bottom: 1px solid var(--sk-border);
        padding: 24px;
        flex-direction: column;
        align-items: stretch;
    }

    .sk-nav.active {
        display: flex;
    }

    .sk-menu {
        flex-direction: column;
        gap: 8px;
    }

    .sk-menu a {
        padding: 12px 16px;
    }

    .sk-header-actions {
        flex-direction: column;
        gap: 12px;
    }

    .sk-mobile-toggle {
        display: flex;
    }

    .sk-hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .sk-hero h1 {
        font-size: 2.5rem;
    }

    .sk-hero-stats {
        gap: 24px;
    }

    .sk-feature-grid,
    .sk-course-grid,
    .sk-pricing-grid,
    .sk-testimonial-grid,
    .sk-creator-grid {
        grid-template-columns: 1fr;
    }

    .sk-pricing-card-featured {
        transform: none;
    }

    .sk-pricing-card-featured:hover {
        transform: translateY(-8px);
    }

    .sk-footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .sk-footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .sk-courses-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }

    .sk-sandbox-body {
        grid-template-columns: 1fr;
    }

    .sk-sandbox-editor {
        border-right: none;
        border-bottom: 1px solid var(--sk-border);
    }
}

@media (max-width: 480px) {
    .sk-hero-cta {
        flex-direction: column;
    }

    .sk-hero-cta .sk-btn {
        width: 100%;
    }

    .sk-hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .sk-cta-buttons {
        flex-direction: column;
    }

    .sk-cta-buttons .sk-btn {
        width: 100%;
    }
}