/* =========================================
   LevelUp Design System - style.css
   ========================================= */

/* =========================================
   1. Design System & CSS Variables
   ========================================= */
:root {
    /* Colors - Light Theme */
    --primary: #4F46E5;        /* Indigo 600 */
    --primary-hover: #4338CA;
    --secondary: #06B6D4;      /* Cyan 500 */
    --bg-main: #F8FAFC;        /* Slate 50 */
    --bg-surface: #FFFFFF;
    --bg-light-alt: #F1F5F9;
    --text-main: #0F172A;      /* Slate 900 */
    --text-muted: #64748B;     /* Slate 500 */
    --border-color: #E2E8F0;
    --border-radius: 12px;

    /* Input Colors */
    --input-bg: #FFFFFF;
    --input-border: #CBD5E1;
    --input-focus-border: #4F46E5;
    --input-focus-ring: rgba(79, 70, 229, 0.2);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-premium: 0 20px 25px -5px rgba(79, 70, 229, 0.1);

    /* Gradients & Motion */
    --ai-gradient: linear-gradient(135deg, var(--primary), var(--secondary));
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;

    /* Legacy "c-" tokens */
    --c-bg: #f8fafc;
    --c-surface: #ffffff;
    --c-surface-darker: #f1f5f9;
    --c-border: #e2e8f0;
    --c-text: #0f172a;
    --c-text-muted: #64748b;
    --c-primary: #4f46e5;
    --c-primary-hover: #4338ca;
    --c-ai: #a855f7;
    --c-ai-bg: rgba(168, 85, 247, 0.1);
}

[data-theme="dark"], body.dark-mode {
    /* Colors - Dark Theme */
    --primary: #6366F1;        /* Indigo 500 */
    --primary-hover: #818CF8;
    --secondary: #22D3EE;      /* Cyan 400 */
    --bg-main: #0B0F19;        /* Custom Deep Dark Blue */
    --bg-surface: #111827;     /* Gray 900 */
    --bg-light-alt: #1F2937;   /* Gray 800 */
    --text-main: #F8FAFC;      /* Slate 50 */
    --text-muted: #94A3B8;     /* Slate 400 */
    --border-color: #1E293B;

    /* Input Colors */
    --input-bg: #1F2937;
    --input-border: #334155;
    --input-focus-border: #6366F1;
    --input-focus-ring: rgba(99, 102, 241, 0.25);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-premium: 0 0 25px -5px rgba(99, 102, 241, 0.2);

    /* Legacy "c-" tokens */
    --c-bg: #09090b;
    --c-surface: #18181b;
    --c-surface-darker: #0f0f12;
    --c-border: #27272a;
    --c-text: #f8fafc;
    --c-text-muted: #a1a1aa;
    --c-primary: #6366f1;
    --c-primary-hover: #818cf8;
}

/* =========================================
   Lesson Page Components
   ========================================= */
body.lesson-page {
    background-color: var(--c-bg);
    color: var(--c-text);
    font-family: 'Inter', system-ui, sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: background-color 0.3s, color 0.3s;
}

/* Typography & Utilities */
.text-sm { font-size: 0.875rem; }
.bg-darker { background-color: var(--c-surface-darker) !important; }
.text-primary { color: var(--c-primary) !important; }
.bg-primary { background-color: var(--c-primary) !important; }
.border-primary { border-color: var(--c-primary) !important; }
.resize-none { resize: none; }
.hide-scrollbar::-webkit-scrollbar { display: none; }

/* Navbar */
.lesson-navbar {
    background-color: var(--c-surface);
    border-bottom: 1px solid var(--c-border);
    height: 64px;
    flex-shrink: 0;
}
.btn-icon {
    width: 36px; height: 36px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 50%;
    color: var(--c-text);
    background: transparent;
    border: none;
    transition: background 0.2s;
}
.btn-icon:hover { background-color: var(--c-border); }

/* Layout Workspace */
.lesson-workspace {
    flex-grow: 1;
    height: calc(100vh - 64px);
    overflow: hidden;
}

/* Sidebar Navigation */
.lesson-sidebar {
    width: 280px;
    background-color: var(--c-surface);
    border-right: 1px solid var(--c-border);
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.lesson-sidebar.collapsed {
    width: 0;
    overflow: hidden;
    border-right: none;
}
.lesson-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--c-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
}
.lesson-item:hover { background-color: var(--c-border); color: var(--c-text); }
.lesson-item.active { background-color: rgba(99, 102, 241, 0.1); color: var(--c-primary); font-weight: 600; }
.lesson-item.completed { color: var(--c-text); }
.lesson-item.locked { opacity: 0.5; pointer-events: none; }

/* Main Content Area */
.lesson-main { background-color: var(--c-bg); }
.content-container { padding-bottom: 100px; }

/* Video Player (Custom UI) */
.video-container {
    background: #000;
    aspect-ratio: 16/9;
}
.video-container video { width: 100%; height: 100%; object-fit: cover; }
.video-controls {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    opacity: 0; transition: opacity 0.3s;
}
.video-container:hover .video-controls, .video-container.paused .video-controls { opacity: 1; }
.control-btn {
    background: none; border: none; color: white;
    font-size: 1.1rem; cursor: pointer; transition: 0.2s;
    width: 32px; height: 32px; border-radius: 4px;
}
.control-btn:hover { background: rgba(255,255,255,0.2); }
.control-btn.ai-glow { color: var(--c-ai); text-shadow: 0 0 8px var(--c-ai); }

/* Progress Bar */
.video-progress {
    height: 4px; background: rgba(255,255,255,0.3);
    border-radius: 2px; cursor: pointer; position: relative;
    transition: height 0.2s;
}
.video-progress:hover { height: 8px; }
.video-progress-filled {
    height: 100%; background: var(--c-primary);
    border-radius: 2px; width: 0%;
    position: relative;
}
.video-progress-filled::after {
    content: ''; position: absolute; right: -5px; top: -3px;
    width: 10px; height: 10px; background: white; border-radius: 50%;
    transform: scale(0); transition: 0.2s;
}
.video-progress:hover .video-progress-filled::after { transform: scale(1); }

.bookmark-marker {
    position: absolute; top: -4px; width: 4px; height: 12px;
    background: var(--c-ai); border-radius: 2px; box-shadow: 0 0 4px var(--c-ai);
}

/* AI Alert */
.alert-ai {
    background-color: var(--c-ai-bg);
    border-left: 4px solid var(--c-ai) !important;
    color: var(--c-text);
}

/* Code Block & Reading */
.lesson-reading h1, .lesson-reading h3 { color: var(--c-text); }
.lesson-reading p { color: var(--c-text-muted); line-height: 1.7; }
pre { margin: 0; padding: 1rem; border-radius: 0 0 8px 8px; background: #0f0f12; overflow-x: auto; color: #e2e8f0; }
.highlight-yellow { background-color: rgba(251, 191, 36, 0.4); border-bottom: 2px solid #fbbf24; }

/* Right Sidebar: AI Panel */
.ai-panel {
    width: 350px; background-color: var(--c-surface);
    border-color: var(--c-border) !important;
    flex-shrink: 0;
}
.nav-tabs .nav-link { color: var(--c-text-muted); border: none; margin-bottom: 5px;}
.nav-tabs .nav-link.active { background-color: var(--c-border); color: var(--c-text); font-weight: 600; }

/* Chat UI */
.chat-messages { display: flex; flex-direction: column; gap: 10px; }
.message-bubble {
    padding: 12px 16px; border-radius: 16px; line-height: 1.5;
    max-width: 90%;
}
.chat-message.ai .message-bubble { background-color: var(--c-border); color: var(--c-text); border-top-left-radius: 4px; }
.chat-message.user { align-self: flex-end; }
.chat-message.user .message-bubble { background-color: var(--c-primary); color: white; border-top-right-radius: 4px; }
.prompt-btn:hover { background-color: var(--c-primary) !important; cursor: pointer; }

/* Timeline UI */
.timeline-container { border-left: 2px solid var(--c-border); padding-left: 15px; margin-left: 10px; }
.timeline-item { position: relative; margin-bottom: 20px; }
.timeline-item::before {
    content: ''; position: absolute; left: -21px; top: 0;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--c-primary); border: 2px solid var(--c-surface);
}
.timeline-item .time { font-size: 0.75rem; color: var(--c-text-muted); margin-bottom: 4px; }
.timeline-item .content { font-size: 0.875rem; color: var(--c-text); background: var(--c-border); padding: 8px 12px; border-radius: 8px; }

/* Highlight Menu (Floating) */
.highlight-menu {
    position: absolute; display: none; background: var(--c-surface-darker);
    border: 1px solid var(--c-border); z-index: 1000;
    align-items: center; gap: 6px;
}
.color-btn {
    width: 24px; height: 24px; border-radius: 50%; border: 2px solid transparent;
    cursor: pointer; transition: 0.2s;
}
.color-btn:hover { transform: scale(1.1); }

/* =========================================
   2. Base Styles
   ========================================= */
body, button, input, textarea, select {
    font-family: 'Inter', sans-serif !important;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    transition: background-color var(--transition-base), color var(--transition-base), border-color 0.3s ease !important;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary-hover); }

/* Typography Classes */
.text-main { color: var(--text-main) !important; }
.text-muted { color: var(--text-muted) !important; }
.bg-surface { background-color: var(--bg-surface) !important; }
.bg-light-alt { background-color: var(--bg-light-alt) !important; }
.border-color { border-color: var(--border-color) !important; }
.fw-black { font-weight: 800; }
.fs-sm { font-size: 0.875rem; }
.fs-xs { font-size: 0.75rem; }
.letter-spacing-1 { letter-spacing: 1px; }
.cursor-pointer { cursor: pointer; }

/* AI Text Effect */
.ai-text-gradient {
    background: var(--ai-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.ai-badge-light {
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.2);
}

/* Helpers */
.section-padding { padding: 80px 0; }
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-premium { box-shadow: var(--shadow-premium) !important; }

/* =========================================
   3. Components
   ========================================= */
/* Navbar */
.custom-navbar {
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}
[data-theme="dark"] .custom-navbar, body.dark-mode .custom-navbar { background-color: rgba(17, 24, 39, 0.85); }
.custom-navbar .nav-link { color: var(--text-main); font-weight: 500; }
.custom-navbar .nav-link:hover { color: var(--primary); }

/* Buttons */
.btn-primary { background-color: var(--primary); border-color: var(--primary); }
.btn-primary:hover { background-color: var(--primary-hover); border-color: var(--primary-hover); }
.btn-premium {
    background: var(--ai-gradient);
    border: none;
    color: #fff;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.btn-premium:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--ai-gradient);
    color: #fff;
}
.btn-premium:disabled {
    opacity: 0.7;
    transform: none;
    box-shadow: none;
}
.btn-surface { background-color: var(--bg-surface); color: var(--text-main); }
.btn-surface:hover { background-color: var(--bg-light-alt); color: var(--text-main); }

/* Theme Toggle Component */
.theme-toggle {
    cursor: pointer;
    border: 1px solid var(--border-color);
    background-color: var(--bg-light-alt);
    color: var(--text-main);
    border-radius: 50%;
    width: 40px; height: 40px;
    display: inline-flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast);
}
.theme-toggle:hover {
    background-color: var(--border-color);
    transform: scale(1.05);
}
.theme-toggle i {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}
.theme-toggle:active i {
    transform: rotate(15deg) scale(0.9);
}

/* Course Card */
.course-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.course-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.course-cover-wrapper { position: relative; overflow: hidden; height: 160px; }
.course-cover-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-base); }
.course-card:hover .course-cover-wrapper img { transform: scale(1.05); }

/* =========================================
   4. Auth Forms & Inputs
   ========================================= */

/* Premium Input Fields */
.form-control-premium {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--text-main);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all var(--transition-fast);
}
.form-control-premium:focus {
    background-color: var(--input-bg);
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 4px var(--input-focus-ring);
    color: var(--text-main);
}
.form-control-premium::placeholder { color: var(--text-muted); opacity: 0.7; }
/* Override browser autocomplete background */
.form-control-premium:-webkit-autofill,
.form-control-premium:-webkit-autofill:hover, 
.form-control-premium:-webkit-autofill:focus, 
.form-control-premium:-webkit-autofill:active{
    -webkit-box-shadow: 0 0 0 30px var(--input-bg) inset !important;
    -webkit-text-fill-color: var(--text-main) !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* Custom Checkbox */
.custom-checkbox .form-check-input {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    cursor: pointer;
}
.custom-checkbox .form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* Social Buttons */
.btn-outline-surface {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    transition: all var(--transition-fast);
}
.btn-outline-surface:hover {
    background-color: var(--bg-light-alt);
    border-color: var(--border-color);
}

/* Background Shapes for Auth */
.auth-section { overflow: hidden; }
.bg-shape {
    position: absolute; border-radius: 50%; filter: blur(80px); z-index: 0;
}
.shape-1 {
    width: 400px; height: 400px; background: var(--primary);
    top: -100px; right: -100px; opacity: 0.15;
}
.shape-2 {
    width: 300px; height: 300px; background: var(--secondary);
    bottom: -50px; left: -50px; opacity: 0.1;
}

/* Validation Feedback override */
.invalid-feedback { font-size: 0.8rem; }
.is-invalid { border-color: #EF4444 !important; }
.is-invalid:focus { box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2) !important; }

/* =========================================
   5. Wizard & Register Components
   ========================================= */

/* Wizard Transitions */
.wizard-step {
    animation: fadeIn 0.4s ease forwards;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Progress Indicator */
.step-indicator {
    transition: color var(--transition-base);
}
.step-indicator.active {
    color: var(--primary) !important;
    font-weight: 700;
}

/* Password Strength Meter */
.meter-bar {
    height: 4px;
    background-color: var(--border-color);
    transition: background-color 0.3s ease;
}
.pwd-rules li i { font-size: 0.5rem; vertical-align: middle; }
.pwd-rules li.valid { color: #10B981; }
.pwd-rules li.valid i::before { content: "\F26A"; }

/* Selectable Badges (Multiple Select) */
.selection-badge {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    background: var(--bg-surface);
    transition: all var(--transition-fast);
}
.selection-badge:hover {
    border-color: var(--primary-hover);
    color: var(--text-main);
}
.selection-badge.active {
    background-color: rgba(79, 70, 229, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    font-weight: 500;
}
[data-theme="dark"] .selection-badge.active, body.dark-mode .selection-badge.active {
    background-color: rgba(99, 102, 241, 0.2);
}

/* Selectable Cards (Single Select - Radio style) */
.selection-card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-muted);
    cursor: pointer;
    background: var(--bg-surface);
    transition: all var(--transition-fast);
}
.selection-card:hover {
    border-color: var(--primary-hover);
}
.selection-card.active {
    background-color: rgba(79, 70, 229, 0.05);
    border-color: var(--primary);
    color: var(--primary);
    font-weight: 600;
    box-shadow: 0 0 0 1px var(--primary);
}

/* =========================================
   6. Dashboard Components
   ========================================= */

/* Dashboard Cards */
.dashboard-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.course-continue-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

/* AI Insight Hero Card */
.ai-insight-card {
    background-color: var(--bg-surface);
    border: 1px solid rgba(79, 70, 229, 0.2);
}
.ai-message-box {
    background: rgba(79, 70, 229, 0.05);
    border: 1px solid rgba(79, 70, 229, 0.1);
    backdrop-filter: blur(10px);
}
[data-theme="dark"] .ai-message-box, body.dark-mode .ai-message-box { background: rgba(99, 102, 241, 0.1); }
.ai-glow-bg {
    position: absolute; width: 300px; height: 300px; background: var(--ai-gradient);
    filter: blur(120px); opacity: 0.1; top: -100px; right: -50px; border-radius: 50%;
    z-index: 0; pointer-events: none;
}
.max-w-md { max-width: 400px; }
.wave-emoji { display: inline-block; animation: wave-animation 2.5s infinite; transform-origin: 70% 70%; }
@keyframes wave-animation {
    0% { transform: rotate( 0.0deg) }
    10% { transform: rotate(14.0deg) }
    20% { transform: rotate(-8.0deg) }
    30% { transform: rotate(14.0deg) }
    40% { transform: rotate(-4.0deg) }
    50% { transform: rotate(10.0deg) }
    60% { transform: rotate( 0.0deg) }
    100% { transform: rotate( 0.0deg) }
}

/* Stat Icons */
.stat-icon { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; }

/* Roadmap Timeline */
.roadmap-container { position: relative; padding-left: 1.5rem; }
.roadmap-container::before {
    content: ''; position: absolute; top: 0; left: 0.75rem; width: 2px; height: 100%;
    background-color: var(--border-color); transform: translateX(-50%);
}
.roadmap-step { position: relative; display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.roadmap-step:last-child { margin-bottom: 0; }
.roadmap-step .step-icon {
    width: 1.5rem; height: 1.5rem; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem; background-color: var(--bg-surface); border: 2px solid var(--border-color);
    position: absolute; left: -1.5rem; top: 0; transform: translateX(-50%); z-index: 1;
}
.roadmap-step.completed .step-icon { background-color: #10B981; border-color: #10B981; color: white; }
.roadmap-step.current .step-icon { background-color: var(--primary); border-color: var(--primary); color: white; box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.2); }
.roadmap-step.locked .step-icon { background-color: var(--bg-light-alt); color: var(--text-muted); }
.roadmap-step.locked .step-content { opacity: 0.6; }

/* Mission List */
.mission-item { transition: background-color var(--transition-fast); }
.mission-item:hover { background-color: var(--bg-light-alt); }
.mission-checkbox { cursor: pointer; width: 1.25rem; height: 1.25rem; }
.mission-checkbox:checked + span { text-decoration: line-through; color: var(--text-muted) !important; }

/* Activity Timeline */
.activity-icon { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }

/* =========================================
   7. Course Detail Specific Styles
   ========================================= */

/* Hero Section (ปรับปรุงแก้ไขให้เข้ากับ Theme ไม่โดด) */
.course-hero { 
    background-color: var(--bg-surface);
    padding-top: 60px; 
    padding-bottom: 60px; 
    border-bottom: 1px solid var(--border-color); 
    position: relative;
    overflow: hidden;
}
.course-hero::before {
    content: '';
    position: absolute;
    top: -150px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: var(--ai-gradient);
    filter: blur(140px);
    opacity: 0.12;
    border-radius: 50%;
    pointer-events: none;
}
.bg-gradient-primary { background: var(--ai-gradient); color: white; border: none; }
.hover-text-primary:hover { color: var(--primary) !important; transition: var(--transition-fast); }
.hover-text-white:hover { color: var(--text-main) !important; transition: var(--transition-fast); }

/* AI Readiness Circular Progress Bar */
.readiness-circle {
    width: 60px; height: 60px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: conic-gradient(var(--primary) var(--score), var(--border-color) 0deg);
    position: relative; font-weight: bold; font-size: 1.1rem; color: var(--text-main);
}
.readiness-circle::before {
    content: ""; position: absolute; inset: 6px; 
    background-color: var(--bg-surface); border-radius: 50%;
}
.readiness-circle span { position: relative; z-index: 1; }

/* AI Readiness Widget Card */
.ai-readiness-widget {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

/* Sticky Sidebar */
.sticky-sidebar {
    position: sticky; top: 90px; 
    transition: transform var(--transition-base); z-index: 10;
}

/* Custom Accordion for Curriculum */
.custom-accordion .accordion-item { background-color: var(--bg-surface) !important; border: 1px solid var(--border-color); margin-bottom: 1rem; border-radius: 16px !important; }
.custom-accordion .accordion-button {
    background-color: var(--bg-surface) !important; box-shadow: none !important; color: var(--text-main) !important; font-weight: 600; padding: 1.25rem 1.5rem; border-radius: 16px !important;
}
.custom-accordion .accordion-button:not(.collapsed) {
    background-color: var(--bg-light-alt) !important; color: var(--primary) !important;
}
.custom-accordion .accordion-button::after {
    background-size: 1rem; transition: transform var(--transition-fast);
}
.hover-bg-light:hover { background-color: var(--bg-light-alt) !important; transition: var(--transition-fast); }

/* AI Q&A Chat Widget */
.max-h-500 { max-height: 500px; }
.ai-chat-body::-webkit-scrollbar { width: 6px; }
.ai-chat-body::-webkit-scrollbar-thumb { background-color: var(--border-color); border-radius: 10px; }
.typing-indicator span {
    display: inline-block; width: 6px; height: 6px; background-color: var(--primary); border-radius: 50%;
    animation: typing 1s infinite alternate; margin: 0 1px;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing { 0% { transform: translateY(0); opacity: 0.5; } 100% { transform: translateY(-3px); opacity: 1; } }

/* Badge for Suggested Course */
.bg-success-subtle { background-color: rgba(25, 135, 84, 0.1) !important; }
.bg-warning-subtle { background-color: rgba(255, 193, 7, 0.1) !important; }

/* =========================================
   8. Learning Path & AI Simulator Styles
   ========================================= */

/* Custom Range Slider (Time Simulator) */
.custom-range-slider {
    -webkit-appearance: none; width: 100%; height: 8px; border-radius: 5px;
    background: var(--border-color); outline: none; padding: 0; margin: 10px 0;
}
.custom-range-slider::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 24px; height: 24px; border-radius: 50%; 
    background: var(--primary); cursor: pointer; border: 3px solid var(--bg-surface);
    box-shadow: 0 0 10px rgba(79, 70, 229, 0.4); transition: transform var(--transition-fast);
}
.custom-range-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

/* Skill Gap Table */
.table-skill-gap th, .table-skill-gap td { padding: 1rem 0; }

/* Roadmap Node Tree Visualization */
.roadmap-tree { padding: 20px 0; }
.roadmap-node { position: relative; }
.node-indicator { display: flex; flex-direction: column; align-items: center; width: 40px; flex-shrink: 0; }
.node-icon {
    width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; z-index: 2; position: relative; transition: var(--transition-base);
}
.node-line { width: 3px; flex-grow: 1; background-color: var(--border-color); min-height: 40px; }
.node-content { transition: transform var(--transition-base), box-shadow var(--transition-base); }
.roadmap-node:not(.locked):hover .node-content { transform: translateX(5px); box-shadow: var(--shadow-md); }

/* Roadmap States */
.roadmap-node.completed .node-line { background-color: #22c55e; opacity: 0.5; }
.roadmap-node.active .node-line { background: linear-gradient(to bottom, var(--primary) 0%, var(--border-color) 100%); }
.roadmap-node.locked .node-content { filter: grayscale(50%); cursor: not-allowed; }

/* Dark Mode Adjustments for Roadmap */
[data-theme="dark"] .roadmap-node.locked .node-content, body.dark-mode .roadmap-node.locked .node-content { background-color: #1A2235 !important; }

/* =========================================
   9. Coding Lab (Web IDE) Styles
   ========================================= */

.coding-lab-layout .nav-tabs-custom { background: var(--bg-surface); padding-top: 5px; }
.coding-lab-layout [data-bs-toggle="tab"] { border-radius: 0; margin-bottom: -2px; }

/* AI Action Buttons */
.ai-action-btn { transition: all 0.2s; }
.ai-action-btn:hover { background-color: var(--primary); color: white; border-color: var(--primary); }

/* Monaco Editor Container */
.editor-wrapper { border: none; outline: none; }
.editor-wrapper .monaco-editor { padding-top: 10px; }

/* Panels toggling */
.ide-panel-left.collapsed { width: 0 !important; overflow: hidden; opacity: 0; border: none !important; }
.ide-panel-right.collapsed { width: 0 !important; overflow: hidden; opacity: 0; border: none !important; }

/* ==========================================================================
   10. AJAX Page Transitions & Premium Layout Additions
   ========================================================================== */

#main-content-area {
    transition: opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 1;
    transform: translateY(0);
    will-change: opacity, transform;
}

#main-content-area.page-fade-out {
    opacity: 0;
    transform: translateY(12px);
}

#ajax-loading-screen {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: opacity 0.2s ease;
}

.hero-gradient-bg {
    position: relative;
    overflow: hidden;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
}

.hero-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--ai-gradient);
    filter: blur(150px);
    opacity: 0.08;
    top: -200px;
    left: -100px;
    border-radius: 50%;
    pointer-events: none;
}

/* =========================================
   11. Custom Rocket Cursor
   ========================================= */
#custom-cursor,
#rocket-cursor,
.custom-cursor,
.rocket-cursor,
.custom-rocket-cursor {
    position: fixed !important;
    z-index: 999999 !important;
    pointer-events: none !important;
}

/* ==========================================
   🚀 Custom Dropdown Component Integration
   ========================================== */

.custom-dropdown-wrapper,
.custom-dropdown-btn,
.custom-dropdown-menu,
.custom-dropdown-item {
    cursor: inherit !important;
    user-select: none !important;
    -webkit-user-select: none !important;
}

.custom-dropdown-wrapper.active .custom-dropdown-btn i {
    transform: rotate(180deg);
}