/**
 * AI & Deep Learning Master Studio Stylesheet
 * Hacker Shreyansh Platform
 * 
 * Aesthetic Dual Theme (Light Studio / Dark Studio)
 * Ultra-Rich Curricular Layout, Sandboxes, Accordions, Code Blocks & Roadmaps
 */
/* Google Fonts enqueued via wp_enqueue_style in functions.php */

:root {
    /* Color Palette - Aesthetic Dark Studio Mode (Default) */
    --ai-bg: #030712;
    --ai-bg-card: rgba(17, 24, 39, 0.85);
    --ai-bg-card-hover: rgba(31, 41, 55, 0.95);
    --ai-border: rgba(56, 189, 248, 0.18);
    --ai-border-hover: rgba(56, 189, 248, 0.4);
    --ai-text-main: #f3f4f6;
    --ai-text-muted: #94a3b8;
    --ai-primary: #38bdf8;
    --ai-primary-dim: rgba(56, 189, 248, 0.15);
    --ai-accent: #818cf8;
    --ai-success: #34d399;
    --ai-warning: #fbbf24;
    --ai-alert: #f87171;
    --ai-purple: #c084fc;
    --ai-glow: 0 0 25px rgba(56, 189, 248, 0.15);
    
    /* Typography */
    --ai-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --ai-font-mono: 'JetBrains Mono', monospace;
}

/* Aesthetic Light Studio Mode */
body.ai-light-mode {
    --ai-bg: #f8fafc;
    --ai-bg-card: rgba(255, 255, 255, 0.95);
    --ai-bg-card-hover: #ffffff;
    --ai-border: rgba(14, 165, 233, 0.25);
    --ai-border-hover: rgba(14, 165, 233, 0.5);
    --ai-text-main: #0f172a;
    --ai-text-muted: #64748b;
    --ai-primary: #0284c7;
    --ai-primary-dim: rgba(2, 132, 199, 0.1);
    --ai-accent: #6366f1;
    --ai-success: #059669;
    --ai-warning: #d97706;
    --ai-alert: #dc2626;
    --ai-purple: #9333ea;
    --ai-glow: 0 0 20px rgba(2, 132, 199, 0.12);
}

/* Studio Global Container */
.ai-studio-body {
    background-color: var(--ai-bg);
    color: var(--ai-text-main);
    font-family: var(--ai-font-sans);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

/* Hero Section */
.ai-studio-hero {
    padding: 60px 0 30px 0;
    border-bottom: 1px solid var(--ai-border);
    background: radial-gradient(circle at 50% 0%, var(--ai-primary-dim) 0%, transparent 70%);
}

.ai-studio-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.ai-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--ai-primary-dim);
    border: 1px solid var(--ai-border);
    border-radius: 9999px;
    font-family: var(--ai-font-mono);
    font-size: 11px;
    color: var(--ai-primary);
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.ai-studio-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin: 0 0 12px 0;
    letter-spacing: -0.5px;
    color: var(--ai-text-main);
}

.ai-gradient-text {
    background: linear-gradient(135deg, var(--ai-primary) 0%, var(--ai-accent) 50%, var(--ai-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.ai-studio-sub {
    font-size: 15px;
    color: var(--ai-text-muted);
    max-width: 760px;
    line-height: 1.7;
    margin: 0;
}

.ai-controls-bar {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-ai-theme-toggle {
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-border);
    color: var(--ai-text-main);
    padding: 8px 16px;
    border-radius: 8px;
    font-family: var(--ai-font-mono);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-ai-theme-toggle:hover {
    border-color: var(--ai-primary);
    box-shadow: var(--ai-glow);
}

.ai-xp-chip {
    background: var(--ai-primary-dim);
    border: 1px solid var(--ai-primary);
    color: var(--ai-primary);
    padding: 8px 16px;
    border-radius: 8px;
    font-family: var(--ai-font-mono);
    font-size: 12px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Track Navigation Tabs */
.ai-track-tabs-wrap {
    overflow-x: auto;
    padding-bottom: 6px;
    margin-top: 15px;
}

.ai-track-tabs {
    display: flex;
    gap: 10px;
    min-width: max-content;
}

.ai-track-tab {
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-border);
    color: var(--ai-text-muted);
    padding: 10px 18px;
    border-radius: 8px;
    font-family: var(--ai-font-mono);
    font-size: 12.5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-track-tab:hover {
    color: var(--ai-text-main);
    border-color: var(--ai-border-hover);
}

.ai-track-tab.active {
    background: var(--ai-primary-dim);
    color: var(--ai-primary);
    border-color: var(--ai-primary);
    box-shadow: var(--ai-glow);
    font-weight: 600;
}

/* Module Sections */
.ai-module-section {
    display: none;
    animation: fadeInModule 0.3s ease-out;
}

.ai-module-section.active {
    display: block;
}

@keyframes fadeInModule {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Grid Layouts */
.ai-studio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
    gap: 24px;
    margin-bottom: 24px;
}

@media (max-width: 640px) {
    .ai-studio-grid {
        grid-template-columns: 1fr;
    }
}

/* Card Styling */
.ai-card {
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: all 0.25s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

body.ai-light-mode .ai-card {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.ai-card:hover {
    border-color: var(--ai-border-hover);
}

.ai-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
    border-bottom: 1px solid var(--ai-border);
    padding-bottom: 12px;
}

.ai-card-title {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
    color: var(--ai-text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-card-badge {
    font-family: var(--ai-font-mono);
    font-size: 10px;
    font-weight: bold;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--ai-primary-dim);
    color: var(--ai-primary);
    border: 1px solid var(--ai-border);
    letter-spacing: 0.5px;
}

/* Formula & Concept Callouts */
.ai-formula-card {
    background: rgba(56, 189, 248, 0.04);
    border-left: 3px solid var(--ai-primary);
    border-radius: 0 8px 8px 0;
    padding: 16px 20px;
    margin: 16px 0;
    font-family: var(--ai-font-mono);
    font-size: 13px;
}

.ai-formula-title {
    color: var(--ai-primary);
    font-weight: bold;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 11px;
}

.ai-math-display {
    font-size: 14.5px;
    color: var(--ai-text-main);
    padding: 6px 0;
    overflow-x: auto;
}

/* Accordion Topics */
.ai-accordion {
    margin-bottom: 16px;
    border: 1px solid var(--ai-border);
    border-radius: 10px;
    background: var(--ai-bg-card);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.ai-accordion.open {
    border-color: var(--ai-primary);
}

.ai-accordion-header {
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    background: rgba(56, 189, 248, 0.02);
    transition: background 0.2s ease;
}

.ai-accordion-header:hover {
    background: rgba(56, 189, 248, 0.06);
}

.ai-accordion-title {
    font-size: 14.5px;
    font-weight: 600;
    color: var(--ai-text-main);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.ai-accordion-icon {
    font-family: var(--ai-font-mono);
    font-size: 14px;
    color: var(--ai-primary);
    transition: transform 0.25s ease;
}

.ai-accordion.open .ai-accordion-icon {
    transform: rotate(90deg);
}

.ai-accordion-body {
    display: none;
    padding: 20px;
    border-top: 1px solid var(--ai-border);
    font-size: 13.5px;
    line-height: 1.7;
    color: var(--ai-text-muted);
}

.ai-accordion.open .ai-accordion-body {
    display: block;
    animation: fadeInModule 0.2s ease-out;
}

/* Code Snippets Container */
.ai-code-wrapper {
    background: #020408;
    border: 1px solid #1e293b;
    border-radius: 8px;
    overflow: hidden;
    margin: 16px 0;
    font-family: var(--ai-font-mono);
    font-size: 12px;
}

body.ai-light-mode .ai-code-wrapper {
    background: #0f172a;
}

.ai-code-header {
    background: #0a0f1d;
    padding: 8px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #1e293b;
    color: #64748b;
    font-size: 11px;
}

.ai-code-pre {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    color: #e2e8f0;
    line-height: 1.6;
}

.ai-code-keyword { color: #f43f5e; font-weight: bold; }
.ai-code-func { color: #38bdf8; }
.ai-code-string { color: #34d399; }
.ai-code-comment { color: #64748b; font-style: italic; }
.ai-code-num { color: #fbbf24; }

/* Interactive Canvas Wrappers */
.ai-canvas-wrap {
    background: #000000;
    border: 1px solid var(--ai-border);
    border-radius: 8px;
    overflow: hidden;
    margin: 15px 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

body.ai-light-mode .ai-canvas-wrap {
    background: #ffffff;
}

.ai-canvas-wrap canvas {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Controls & Sliders */
.ai-control-group {
    margin-bottom: 14px;
}

.ai-control-label {
    display: flex;
    justify-content: space-between;
    font-family: var(--ai-font-mono);
    font-size: 11.5px;
    color: var(--ai-text-muted);
    margin-bottom: 6px;
}

.ai-slider {
    width: 100%;
    accent-color: var(--ai-primary);
    cursor: pointer;
}

.ai-btn-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.btn-ai-action {
    background: var(--ai-primary);
    color: #000000;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-family: var(--ai-font-mono);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-ai-action:hover {
    background: #ffffff;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
}

.btn-ai-secondary {
    background: transparent;
    border: 1px solid var(--ai-border);
    color: var(--ai-text-main);
    padding: 8px 16px;
    border-radius: 6px;
    font-family: var(--ai-font-mono);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-ai-secondary:hover {
    border-color: var(--ai-primary);
    color: var(--ai-primary);
}

/* Multi-Layer Perceptron (MLP) Visualizer */
.mlp-nodes-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid var(--ai-border);
    margin: 15px 0;
}

body.ai-light-mode .mlp-nodes-grid {
    background: rgba(241, 245, 249, 0.6);
}

.mlp-layer {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.mlp-layer-title {
    font-family: var(--ai-font-mono);
    font-size: 10px;
    color: var(--ai-text-muted);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.mlp-node {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--ai-bg-card);
    border: 2px solid var(--ai-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--ai-font-mono);
    font-size: 11px;
    font-weight: bold;
    color: var(--ai-primary);
    transition: all 0.3s ease;
}

.mlp-node.active-pulse {
    background: var(--ai-primary);
    color: #000;
    box-shadow: 0 0 15px var(--ai-primary);
    transform: scale(1.15);
}

/* Attention Heatmap Table */
.attention-heatmap-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--ai-font-mono);
    font-size: 11.5px;
    margin-top: 10px;
}

.attention-heatmap-table th,
.attention-heatmap-table td {
    padding: 8px;
    text-align: center;
    border: 1px solid var(--ai-border);
}

.attention-heatmap-table th {
    background: var(--ai-primary-dim);
    color: var(--ai-primary);
}

.heat-cell {
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 3px rgba(0,0,0,0.8);
    transition: all 0.2s ease;
}

/* Tokenizer Breakdown Pills */
.token-pills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 14px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid var(--ai-border);
    margin-top: 12px;
    min-height: 55px;
    align-items: center;
}

body.ai-light-mode .token-pills-container {
    background: rgba(241, 245, 249, 0.6);
}

.token-pill {
    padding: 5px 10px;
    border-radius: 6px;
    font-family: var(--ai-font-mono);
    font-size: 11.5px;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.token-id {
    font-size: 9.5px;
    opacity: 0.75;
    background: rgba(0,0,0,0.3);
    padding: 1px 4px;
    border-radius: 3px;
}

/* Confusion Matrix Grid */
.confusion-matrix-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 15px 0;
    text-align: center;
    font-family: var(--ai-font-mono);
}

.cm-cell {
    padding: 14px;
    border-radius: 6px;
    border: 1px solid var(--ai-border);
    background: rgba(0,0,0,0.2);
}

.cm-cell-tp { border-color: var(--ai-success); background: rgba(52, 211, 153, 0.08); }
.cm-cell-tn { border-color: var(--ai-primary); background: rgba(56, 189, 248, 0.08); }
.cm-cell-fp { border-color: var(--ai-warning); background: rgba(251, 191, 36, 0.08); }
.cm-cell-fn { border-color: var(--ai-alert); background: rgba(248, 113, 113, 0.08); }

.cm-label { font-size: 11px; color: var(--ai-text-muted); display: block; margin-bottom: 4px; }
.cm-val { font-size: 18px; font-weight: bold; color: var(--ai-text-main); }

/* RAG Stepper */
.rag-pipeline-stepper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    margin: 15px 0;
    overflow-x: auto;
    padding-bottom: 6px;
}

.rag-step-node {
    flex: 1;
    min-width: 90px;
    padding: 10px 8px;
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-border);
    border-radius: 6px;
    text-align: center;
    font-size: 11px;
    font-family: var(--ai-font-mono);
    color: var(--ai-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.rag-step-node.active-step {
    border-color: var(--ai-primary);
    color: var(--ai-primary);
    background: rgba(56, 189, 248, 0.12);
    box-shadow: var(--ai-glow);
    font-weight: bold;
}

.rag-arrow {
    color: var(--ai-text-muted);
    font-size: 12px;
}

/* Comparison Tables */
.ai-comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 12px;
}

.ai-comparison-table th {
    background: rgba(56, 189, 248, 0.08);
    color: var(--ai-primary);
    font-family: var(--ai-font-mono);
    padding: 10px 12px;
    text-align: left;
    border-bottom: 2px solid var(--ai-border);
}

.ai-comparison-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--ai-border);
    color: var(--ai-text-muted);
}

.ai-comparison-table tr:hover td {
    background: rgba(56, 189, 248, 0.02);
    color: var(--ai-text-main);
}

/* Roadmap Ladder */
.ai-roadmap-step {
    display: flex;
    gap: 16px;
    margin-bottom: 22px;
    position: relative;
}

.ai-roadmap-step::before {
    content: '';
    position: absolute;
    top: 36px;
    left: 17px;
    bottom: -15px;
    width: 2px;
    background: var(--ai-border);
}

.ai-roadmap-step:last-child::before {
    display: none;
}

.ai-step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--ai-bg-card);
    border: 2px solid var(--ai-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-family: var(--ai-font-mono);
    font-weight: bold;
    color: var(--ai-primary);
    flex-shrink: 0;
    z-index: 2;
}

.ai-step-content {
    flex: 1;
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-border);
    border-radius: 8px;
    padding: 16px 20px;
}

.ai-step-content h4 {
    margin: 0 0 6px 0;
    color: var(--ai-text-main);
    font-size: 14px;
}

.ai-step-content p {
    margin: 0;
    font-size: 12.5px;
    color: var(--ai-text-muted);
    line-height: 1.5;
}

/* Quizzes */
.ai-quiz-box {
    background: rgba(129, 140, 248, 0.05);
    border: 1px solid rgba(129, 140, 248, 0.25);
    border-radius: 8px;
    padding: 16px;
    margin-top: 16px;
}

.ai-quiz-q {
    font-size: 13px;
    font-weight: 600;
    color: var(--ai-text-main);
    margin-bottom: 12px;
}

.ai-quiz-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-quiz-btn {
    background: var(--ai-bg-card);
    border: 1px solid var(--ai-border);
    color: var(--ai-text-muted);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 12px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ai-quiz-btn:hover:not(:disabled) {
    border-color: var(--ai-primary);
    color: var(--ai-text-main);
}

.ai-quiz-btn.correct {
    border-color: var(--ai-success);
    background: rgba(52, 211, 153, 0.15);
    color: var(--ai-success);
    font-weight: bold;
}

.ai-quiz-btn.incorrect {
    border-color: var(--ai-alert);
    background: rgba(248, 113, 113, 0.15);
    color: var(--ai-alert);
}

/* ==========================================================
   MOBILE & TABLET UI/UX RESPONSIVENESS (AI STUDIO)
   ========================================================== */
@media (max-width: 900px) {
    .ai-studio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .ai-studio-body {
        padding: 15px 0 40px 0;
    }

    .ai-studio-hero {
        padding: 20px 16px;
    }

    .ai-studio-title {
        font-size: 1.65rem;
    }

    .ai-track-tabs {
        gap: 6px;
    }

    .ai-track-tab {
        padding: 6px 12px;
        font-size: 11px;
    }

    .ai-card {
        padding: 16px;
    }

    .ai-card-title {
        font-size: 1.1rem;
    }

    .mlp-nodes-grid {
        flex-direction: column;
        gap: 16px;
    }

    .mlp-layer {
        display: flex;
        flex-direction: row;
        gap: 8px;
    }

    .rag-pipeline-stepper {
        justify-content: flex-start;
    }

    .btn-ai-action, .btn-ai-secondary {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .ai-studio-title {
        font-size: 1.4rem;
    }

    .confusion-matrix-grid {
        grid-template-columns: 1fr;
    }

    .cm-val {
        font-size: 15px;
    }
}