/* ==========================================================================
   Godot 4 Presentation Slides - Custom Dark Glassmorphism Theme
   ========================================================================== */

:root {
    --bg-dark: #090a18;
    --bg-gradient: linear-gradient(135deg, #090a1a 0%, #100b29 50%, #0d081e 100%);
    --card-bg: rgba(24, 20, 48, 0.75);
    --card-border: rgba(255, 255, 255, 0.12);
    --card-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    
    /* Text Colors */
    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    --text-accent: #d8b4fe;
    
    /* Syntax Highlighting (GDScript) */
    --syn-keyword: #ff477e;
    --syn-type: #38bdf8;
    --syn-func: #4ade80;
    --syn-var: #f8fafc;
    --syn-annotation: #c084fc;
    --syn-comment: #94a3b8;
    --syn-string: #facc15;
    
    /* Fonts */
    --font-title: 'Playfair Display', serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    --font-code: 'Fira Code', monospace;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

/* ==========================================================================
   Background & Ambient Lighting (Orbs + Waves)
   ========================================================================== */
.bg-gradient-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-gradient);
    z-index: -1;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    opacity: 0.6;
    animation: pulse 8s ease-in-out infinite alternate;
}

.orb-1 {
    top: -10%;
    right: 5%;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(192, 132, 252, 0.45) 0%, rgba(139, 92, 246, 0) 70%);
}

.orb-2 {
    bottom: -15%;
    left: -5%;
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.4) 0%, rgba(219, 39, 119, 0) 70%);
}

.orb-3 {
    top: 40%;
    right: 35%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, rgba(14, 165, 233, 0) 70%);
}

.wave-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.7;
}

@keyframes pulse {
    0% { transform: scale(1) translateY(0); opacity: 0.5; }
    100% { transform: scale(1.15) translateY(-20px); opacity: 0.75; }
}

/* ==========================================================================
   Presentation Wrapper & Slides
   ========================================================================== */
.presentation-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 4rem;
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    height: calc(100vh - 80px);
}

.slide {
    display: none;
    flex-direction: column;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.slide.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Slide Header
   ========================================================================== */
.slide-header {
    text-align: center;
    margin-bottom: 2rem;
    flex-shrink: 0;
}

.slide-header .title {
    font-family: var(--font-title);
    font-size: 3.2rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: #ffffff;
    text-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
    text-transform: uppercase;
}

.slide-header .subtitle {
    font-size: 1.15rem;
    color: var(--text-accent);
    margin-top: 0.5rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ==========================================================================
   Slide Body Layouts
   ========================================================================== */
.slide-body {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 3rem;
    overflow: visible;
}

.grid-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    height: 100%;
    align-items: center;
}

.col-left, .col-right {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.space-y-4 > * + * { margin-top: 1rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }

.section-desc {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-muted);
}

/* ==========================================================================
   Pills & Bullet Lists
   ========================================================================== */
.pill-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.pill-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(30, 25, 60, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    padding: 0.85rem 1.25rem;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.pill-item:hover {
    transform: translateX(6px);
    border-color: rgba(216, 180, 254, 0.3);
}

.pill-code {
    font-family: var(--font-code);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.4);
    white-space: nowrap;
}

.pill-code.red { color: var(--syn-keyword); border: 1px solid rgba(255, 71, 126, 0.3); }
.pill-code.blue { color: var(--syn-type); border: 1px solid rgba(56, 189, 248, 0.3); }
.pill-code.green { color: var(--syn-func); border: 1px solid rgba(74, 222, 128, 0.3); }

.arrow {
    color: var(--text-accent);
    font-weight: bold;
    font-size: 1.1rem;
}

.pill-text {
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 500;
}

/* ==========================================================================
   Code Window Container (Mockup Window)
   ========================================================================== */
.code-window {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(15, 12, 35, 0.8);
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.file-name {
    font-family: var(--font-code);
    font-size: 0.85rem;
    color: var(--text-accent);
    font-weight: 500;
}

.window-dots {
    display: flex;
    gap: 6px;
}

.dot {
    font-size: 0.75rem;
}
.dot-blue { color: #38bdf8; }
.dot-yellow { color: #facc15; }
.dot-red { color: #ff477e; }

.code-content {
    font-family: var(--font-code);
    font-size: 0.95rem;
    line-height: 1.65;
    padding: 1.5rem;
    overflow-x: auto;
    color: var(--text-main);
}

/* Syntax Color Tokens */
.k-keyword { color: var(--syn-keyword); font-weight: 600; }
.k-type { color: var(--syn-type); font-weight: 600; }
.k-func { color: var(--syn-func); }
.k-var { color: var(--syn-var); }
.k-annotation { color: var(--syn-annotation); font-weight: 600; }
.k-comment { color: var(--syn-comment); font-style: italic; }
.k-string { color: var(--syn-string); }

/* ==========================================================================
   Cards & Diagrams
   ========================================================================== */
.info-card, .feature-card, .diagram-card, .summary-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(14px);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
}

.info-card.highlight-card {
    border-color: rgba(192, 132, 252, 0.3);
    background: linear-gradient(135deg, rgba(35, 28, 70, 0.7) 0%, rgba(20, 16, 45, 0.7) 100%);
}

.icon-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.75rem;
}

.badge {
    background: rgba(192, 132, 252, 0.2);
    border: 1px solid rgba(192, 132, 252, 0.4);
    color: var(--text-accent);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    letter-spacing: 1px;
}

.feature-card.bad { border-left: 4px solid #ef4444; }
.feature-card.good { border-left: 4px solid #10b981; }
.feature-card.highlight { border-left: 4px solid #c084fc; }

.feature-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    color: #ffffff;
}

.feature-card p, .feature-card ul {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.feature-card ul {
    margin-top: 0.5rem;
    padding-left: 1.2rem;
}

/* Tree Diagram Visual */
.diagram-title {
    font-size: 1.1rem;
    color: var(--text-accent);
    margin-bottom: 1rem;
    text-align: center;
    font-family: var(--font-code);
}

.tree-visual {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tree-node {
    padding: 0.6rem 1rem;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tree-node.parent {
    border-color: rgba(56, 189, 248, 0.4);
    background: rgba(56, 189, 248, 0.1);
}

.tree-children {
    margin-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    border-left: 2px dashed rgba(255, 255, 255, 0.15);
    padding-left: 0.8rem;
}

.tree-node.highlight-node {
    border-color: rgba(74, 222, 128, 0.5);
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}

.node-type {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.divider-line {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 1.2rem 0;
}

/* Type Table Rows */
.type-explanation-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.type-row {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.type-tag {
    font-family: var(--font-code);
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-weight: 600;
    min-width: 170px;
    text-align: center;
}

.type-tag.blue { background: rgba(56, 189, 248, 0.15); color: #38bdf8; border: 1px solid rgba(56, 189, 248, 0.3); }
.type-tag.pink { background: rgba(255, 71, 126, 0.15); color: #ff477e; border: 1px solid rgba(255, 71, 126, 0.3); }
.type-tag.green { background: rgba(74, 222, 128, 0.15); color: #4ade80; border: 1px solid rgba(74, 222, 128, 0.3); }

.type-arrow { color: var(--text-accent); font-weight: bold; }
.type-desc { font-size: 0.9rem; color: var(--text-muted); }

/* Godot Scene Mockup */
.godot-scene-mockup {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-family: var(--font-code);
    font-size: 0.9rem;
}

.godot-node {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.25);
}

.godot-node.sub {
    margin-left: 1.5rem;
    border-left: 2px solid rgba(192, 132, 252, 0.4);
}

.node-script {
    color: var(--text-accent);
    font-size: 0.8rem;
    margin-left: auto;
}

/* Summary Box */
.summary-box h3 {
    font-family: var(--font-title);
    color: #ffffff;
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    text-align: center;
    letter-spacing: 2px;
}

.summary-steps {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.step-num {
    background: linear-gradient(135deg, #c084fc, #9333ea);
    color: #ffffff;
    font-weight: 700;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(147, 51, 234, 0.4);
}

.step-text strong {
    color: var(--text-main);
    display: block;
    margin-bottom: 0.2rem;
    font-size: 1rem;
}

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

.info-box-sm {
    background: rgba(192, 132, 252, 0.1);
    border: 1px dashed rgba(192, 132, 252, 0.3);
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ==========================================================================
   Presentation Navigation Controls Footer
   ========================================================================== */
.presentation-controls {
    height: 70px;
    background: rgba(12, 9, 30, 0.85);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 0 2rem;
    z-index: 100;
}

.nav-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-main);
    padding: 0.6rem 1.4rem;
    border-radius: 30px;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background: rgba(192, 132, 252, 0.25);
    border-color: rgba(192, 132, 252, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(192, 132, 252, 0.3);
}

.nav-btn.secondary {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

.slide-indicator {
    font-family: var(--font-code);
    font-size: 0.95rem;
    color: var(--text-accent);
    background: rgba(0, 0, 0, 0.3);
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .grid-2col {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        overflow-y: auto;
    }
    .slide-header .title {
        font-size: 2.2rem;
    }
    .presentation-wrapper {
        padding: 1rem;
    }
}

/* ==========================================================================
   Slide 1 (Cover) Custom Styles
   ========================================================================== */
.center-content-flex {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
}

.icon-cover-container {
    margin-bottom: 1rem;
}

.terminal-icon-mockup {
    background: linear-gradient(180deg, rgba(30, 30, 45, 0.9) 0%, rgba(15, 15, 25, 0.9) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    width: 160px;
    height: 120px;
    padding: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
}

.terminal-icon-mockup .dots {
    display: flex;
    gap: 6px;
    margin-bottom: 15px;
    justify-content: flex-end;
}

.terminal-icon-mockup .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.terminal-icon-mockup .dot.yellow { background: #facc15; }
.terminal-icon-mockup .dot.blue { background: #38bdf8; }
.terminal-icon-mockup .dot.red { background: #ff477e; }

.terminal-icon-mockup .lines {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.terminal-icon-mockup .line {
    height: 4px;
    border-radius: 2px;
}

.red-line { background: #ff477e; width: 80%; }
.purple-line { background: #c084fc; width: 100%; }
.pink-line { background: #f472b6; width: 90%; }
.blue-line { background: #38bdf8; width: 70%; }
.green-line { background: #4ade80; width: 85%; }

/* ==========================================================================
   Speech Bubbles
   ========================================================================== */
.relative-container {
    position: relative;
}

.speech-bubble {
    position: absolute;
    background: #507aff;
    color: #ffffff;
    padding: 14px 20px;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.4;
    box-shadow: 0 10px 25px rgba(80, 122, 255, 0.4);
    z-index: 10;
    font-family: var(--font-body);
}

.speech-bubble::after {
    content: '';
    position: absolute;
    top: -15px;
    left: 30px;
    border-width: 0 20px 25px 0;
    border-style: solid;
    border-color: transparent transparent #507aff transparent;
    display: block;
    width: 0;
}

/* ==========================================================================
   Godot UI Mockup
   ========================================================================== */
.godot-panel {
    background: #202531;
    border: 1px solid #3c414c;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    color: #cbd5e1;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.godot-panel-header {
    background: #181b24;
    padding: 8px 15px;
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid #3c414c;
    display: flex;
    justify-content: space-between;
}

.godot-tree {
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.godot-node {
    display: flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
}

.godot-node:hover {
    background: #33394a;
}

.godot-node.selected {
    background: #478cbf33;
    border: 1px solid #478cbf;
}

.node-indent {
    width: 20px;
}

.godot-icon {
    width: 18px;
    height: 18px;
    margin-right: 8px;
}

.godot-script-icon {
    width: 16px;
    height: 16px;
    margin-left: auto;
    opacity: 0.8;
}

/* ==========================================================================
   Vector2 Graph
   ========================================================================== */
.vector-graph-godot {
    position: relative;
    width: 320px;
    height: 320px;
    margin: 20px auto;
    border: 2px solid rgba(255,255,255,0.1);
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 38px,
        rgba(255,255,255,0.05) 38px,
        rgba(255,255,255,0.05) 40px
    ),
    repeating-linear-gradient(
        90deg,
        transparent,
        transparent 38px,
        rgba(255,255,255,0.05) 38px,
        rgba(255,255,255,0.05) 40px
    );
}

.axis-x {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 3px;
    background: #ff477e;
    margin-top: -1px;
}

.axis-y {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    background: #507aff;
    margin-left: -1px;
}

.arrow-right {
    position: absolute;
    top: 50%;
    right: -10px;
    margin-top: -8px;
    width: 0; height: 0; 
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 12px solid #ff477e;
}

.arrow-down {
    position: absolute;
    bottom: -10px;
    left: 50%;
    margin-left: -8px;
    width: 0; height: 0; 
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 12px solid #507aff;
}

.axis-label {
    position: absolute;
    font-weight: 900;
    font-size: 1.2rem;
}

.label-x {
    right: 15px;
    top: calc(50% + 15px);
    color: #ff477e;
}

.label-y {
    bottom: 15px;
    left: calc(50% + 15px);
    color: #507aff;
}

/* ==========================================================================
   Godot Inspector Mockup
   ========================================================================== */
.godot-editor-layout {
    display: flex;
    border: 1px solid #3c414c;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    background: #202531;
}

.godot-editor-layout .godot-panel {
    border: none;
    border-radius: 0;
    box-shadow: none;
    flex: 1.3;
}

.godot-inspector {
    display: flex;
    flex-direction: column;
    background: #202531;
    border-left: 1px solid #3c414c;
    flex: 1;
}

.godot-inspector-header {
    background: #181b24;
    padding: 8px 15px;
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid #3c414c;
    color: #cbd5e1;
}

.godot-inspector-body {
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.godot-prop-group {
    display: flex;
    flex-direction: column;
}

.godot-prop-title {
    background: rgba(255,255,255,0.05);
    padding: 6px 8px;
    font-size: 0.8rem;
    font-weight: 700;
    color: #e2e8f0;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.godot-prop-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 8px 0;
}

.godot-prop-label {
    font-size: 0.85rem;
    color: #94a3b8;
}

.godot-prop-input {
    background: #181b24;
    border: 1px solid #3c414c;
    color: #4ade80;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: var(--font-code);
    font-size: 0.85rem;
    width: 65px;
    text-align: left;
    outline: none;
}

/* ==========================================================================
   WASD Keyboard Layout
   ========================================================================== */
.keyboard-layout {
    display: grid;
    grid-template-areas: 
        ". w ."
        "a s d";
    gap: 8px;
    justify-content: center;
    align-items: center;
    margin: 15px 0;
}

.key {
    background: rgba(255,255,255,0.1);
    border-bottom: 4px solid rgba(0,0,0,0.4);
    border-right: 2px solid rgba(0,0,0,0.2);
    border-left: 1px solid rgba(255,255,255,0.1);
    border-top: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--font-title);
    font-weight: 700;
    font-size: 1.3rem;
    color: #ffffff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.key-w { grid-area: w; }
.key-a { grid-area: a; }
.key-s { grid-area: s; }
.key-d { grid-area: d; }