:root {
    --primary: #F9F5EB;
    --secondary: #E4DCCF;
    --tertiary: #EA5455;
    --accent: #002B5B;
    --accent-light: #004080;
    --glow: rgba(234, 84, 85, 0.6);
}

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

body {
    font-family: 'VT323', monospace;
    background: linear-gradient(135deg, #001a3d 0%, #002B5B 50%, #003d6e 100%);
    color: var(--primary);
    overflow: hidden;
    position: relative;
}

/* Enhanced CRT Screen Effect with Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15),
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    z-index: 1000;
    animation: scanline 8s linear infinite;
}

@keyframes scanline {
    0% { transform: translateY(0); }
    100% { transform: translateY(100%); }
}

/* Enhanced Vignette with Glow */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-shadow: 
        inset 0 0 200px rgba(0, 0, 0, 0.9),
        inset 0 0 400px rgba(234, 84, 85, 0.1);
    pointer-events: none;
    z-index: 999;
}

/* Animated Background Pattern */
.presentation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(234, 84, 85, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(228, 220, 207, 0.05) 0%, transparent 50%);
    animation: pulseGlow 6s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* Enhanced Progress Bar with Glow */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, 
        rgba(234, 84, 85, 0.2) 0%, 
        rgba(234, 84, 85, 0.1) 100%);
    z-index: 1001;
    box-shadow: 0 0 20px rgba(234, 84, 85, 0.3);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, 
        var(--tertiary) 0%, 
        #ff6b6c 50%, 
        var(--tertiary) 100%);
    width: 4%;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 0 20px var(--glow),
        0 0 40px var(--glow),
        0 2px 10px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.4), 
        transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 200%; }
}

/* Enhanced Controls Panel */
.controls-panel {
    position: fixed;
    top: 30px;
    right: 30px;
    display: flex;
    gap: 15px;
    z-index: 1001;
}

.control-btn {
    background: linear-gradient(135deg, 
        rgba(234, 84, 85, 0.9) 0%, 
        rgba(200, 60, 61, 0.9) 100%);
    color: var(--primary);
    border: 3px solid var(--tertiary);
    width: 55px;
    height: 55px;
    font-size: 22px;
    font-family: 'VT323', monospace;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 6px 0 rgba(234, 84, 85, 0.4),
        0 0 30px rgba(234, 84, 85, 0.3);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.3), 
        transparent);
    transition: left 0.5s;
}

.control-btn:hover::before {
    left: 100%;
}

.control-btn:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 10px 0 rgba(234, 84, 85, 0.4),
        0 0 40px var(--glow),
        0 10px 30px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, 
        var(--primary) 0%, 
        var(--secondary) 100%);
    color: var(--accent);
    border-color: var(--primary);
}

.control-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 rgba(234, 84, 85, 0.4),
        0 0 20px var(--glow);
}

.control-btn.active {
    background: linear-gradient(135deg, 
        var(--primary) 0%, 
        var(--secondary) 100%);
    color: var(--tertiary);
    box-shadow: 
        inset 0 0 20px rgba(234, 84, 85, 0.5),
        0 0 40px var(--glow);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: inset 0 0 20px rgba(234, 84, 85, 0.5), 0 0 40px var(--glow); }
    50% { box-shadow: inset 0 0 30px rgba(234, 84, 85, 0.7), 0 0 60px var(--glow); }
}

/* Enhanced Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: linear-gradient(135deg, 
        var(--accent) 0%, 
        var(--accent-light) 100%);
    border: 4px solid var(--tertiary);
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 
        0 0 80px rgba(234, 84, 85, 0.6),
        0 20px 60px rgba(0, 0, 0, 0.8),
        inset 0 0 100px rgba(234, 84, 85, 0.1);
    animation: slideInDown 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, 
        var(--tertiary), 
        transparent, 
        var(--tertiary));
    z-index: -1;
    filter: blur(20px);
    opacity: 0.5;
}

.modal-header {
    background: linear-gradient(135deg, 
        rgba(234, 84, 85, 0.3) 0%, 
        rgba(234, 84, 85, 0.1) 100%);
    padding: 35px 40px;
    border-bottom: 3px solid var(--tertiary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 20px rgba(234, 84, 85, 0.2);
}

.modal-header h2 {
    font-size: 48px;
    color: var(--tertiary);
    margin: 0;
    text-shadow: 
        0 0 20px var(--glow),
        2px 2px 0 rgba(0, 0, 0, 0.5);
}

.close-btn {
    background: linear-gradient(135deg, 
        var(--tertiary) 0%, 
        #c43e3f 100%);
    color: var(--primary);
    border: none;
    width: 55px;
    height: 55px;
    font-size: 40px;
    font-family: 'VT323', monospace;
    cursor: pointer;
    transition: all 0.3s;
    line-height: 1;
    box-shadow: 
        0 4px 0 rgba(0, 0, 0, 0.3),
        0 0 20px rgba(234, 84, 85, 0.4);
}

.close-btn:hover {
    background: linear-gradient(135deg, 
        var(--primary) 0%, 
        var(--secondary) 100%);
    color: var(--accent);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 
        0 6px 0 rgba(0, 0, 0, 0.3),
        0 0 30px var(--glow);
}

/* Enhanced Shortcut Items */
.shortcut-item {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 25px;
    background: linear-gradient(135deg, 
        rgba(249, 245, 235, 0.08) 0%, 
        rgba(249, 245, 235, 0.03) 100%);
    border: 2px solid var(--tertiary);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.shortcut-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, 
        rgba(234, 84, 85, 0.1) 0%, 
        transparent 70%);
    transform: scale(0);
    transition: transform 0.5s;
}

.shortcut-item:hover {
    transform: translateX(8px);
    border-color: var(--primary);
    background: linear-gradient(135deg, 
        rgba(234, 84, 85, 0.15) 0%, 
        rgba(234, 84, 85, 0.05) 100%);
    box-shadow: 
        -8px 0 20px rgba(234, 84, 85, 0.3),
        0 0 30px rgba(234, 84, 85, 0.2);
}

.shortcut-item:hover::before {
    transform: scale(1);
}

.shortcut-item kbd {
    display: inline-block;
    background: linear-gradient(135deg, 
        var(--tertiary) 0%, 
        #c43e3f 100%);
    color: var(--primary);
    padding: 12px 20px;
    border-radius: 4px;
    font-family: 'Press Start 2P', monospace;
    font-size: 14px;
    margin-right: 8px;
    box-shadow: 
        0 4px 0 rgba(0, 0, 0, 0.3),
        0 0 20px rgba(234, 84, 85, 0.3);
    transition: all 0.2s;
}

.shortcut-item:hover kbd {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 0 rgba(0, 0, 0, 0.3),
        0 0 30px var(--glow);
}

/* Enhanced Overview */
.overview-container {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0, 26, 61, 0.98) 0%, 
        rgba(0, 43, 91, 0.98) 100%);
    backdrop-filter: blur(10px);
    z-index: 1500;
    overflow-y: auto;
    animation: fadeIn 0.3s;
}

.overview-header {
    padding: 40px 50px;
    border-bottom: 3px solid var(--tertiary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: linear-gradient(180deg, 
        var(--accent) 0%, 
        rgba(0, 43, 91, 0.95) 100%);
    z-index: 10;
    box-shadow: 
        0 8px 30px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(234, 84, 85, 0.2);
}

.overview-header h2 {
    font-size: 60px;
    color: var(--tertiary);
    margin: 0;
    text-shadow: 
        0 0 30px var(--glow),
        3px 3px 0 rgba(0, 0, 0, 0.5);
}

.overview-slide {
    background: linear-gradient(135deg, 
        rgba(249, 245, 235, 0.08) 0%, 
        rgba(249, 245, 235, 0.03) 100%);
    border: 3px solid var(--tertiary);
    padding: 25px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.overview-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(234, 84, 85, 0.2), 
        transparent);
    transition: left 0.5s;
}

.overview-slide:hover::before {
    left: 100%;
}

.overview-slide:hover {
    transform: scale(1.08) translateY(-12px);
    box-shadow: 
        0 30px 60px rgba(234, 84, 85, 0.4),
        0 0 60px var(--glow),
        inset 0 0 30px rgba(234, 84, 85, 0.1);
    border-color: var(--primary);
    background: linear-gradient(135deg, 
        rgba(234, 84, 85, 0.15) 0%, 
        rgba(249, 245, 235, 0.08) 100%);
}

.overview-slide.current {
    border-color: var(--primary);
    box-shadow: 
        0 0 60px rgba(249, 245, 235, 0.6),
        0 20px 40px rgba(0, 0, 0, 0.5),
        inset 0 0 40px rgba(249, 245, 235, 0.1);
    background: linear-gradient(135deg, 
        rgba(249, 245, 235, 0.15) 0%, 
        rgba(249, 245, 235, 0.08) 100%);
}

.overview-slide-number {
    position: absolute;
    top: 15px;
    left: 15px;
    background: linear-gradient(135deg, 
        var(--tertiary) 0%, 
        #c43e3f 100%);
    color: var(--primary);
    padding: 10px 18px;
    font-size: 22px;
    font-family: 'Press Start 2P', monospace;
    box-shadow: 
        0 4px 0 rgba(0, 0, 0, 0.3),
        0 0 20px var(--glow);
}

/* Enhanced Slides */
.presentation {
    width: 100vw;
    height: 100vh;
    position: relative;
    background: linear-gradient(135deg, #001a3d 0%, #002B5B 50%, #003d6e 100%);
}

.slide {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: none;
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.slide.prev {
    opacity: 0;
    transform: translateX(-100%);
}

/* Enhanced Title Slide */
.slide h1 {
    font-size: 120px;
    color: var(--tertiary);
    text-shadow: 
        0 0 40px var(--glow),
        0 0 80px var(--glow),
        4px 4px 0 var(--secondary),
        8px 8px 0 var(--accent),
        8px 8px 30px rgba(0, 0, 0, 0.8);
    letter-spacing: -3px;
    margin-bottom: 40px;
    animation: glitch 3s infinite, glow 2s ease-in-out infinite;
    position: relative;
}

@keyframes glow {
    0%, 100% {
        text-shadow: 
            0 0 40px var(--glow),
            0 0 80px var(--glow),
            4px 4px 0 var(--secondary),
            8px 8px 0 var(--accent);
    }
    50% {
        text-shadow: 
            0 0 60px var(--glow),
            0 0 120px var(--glow),
            4px 4px 0 var(--secondary),
            8px 8px 0 var(--accent);
    }
}

.slide h2 {
    font-size: 80px;
    color: var(--tertiary);
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 5px;
    border-bottom: 4px solid var(--tertiary);
    padding-bottom: 20px;
    text-shadow: 
        0 0 30px var(--glow),
        2px 2px 0 rgba(0, 0, 0, 0.5);
    position: relative;
}

.slide h2::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--tertiary);
    box-shadow: 0 0 20px var(--glow);
}

/* Enhanced Content Box */
.content-box {
    background: linear-gradient(135deg, 
        rgba(249, 245, 235, 0.08) 0%, 
        rgba(249, 245, 235, 0.03) 100%);
    border: 3px solid var(--tertiary);
    padding: 50px;
    border-radius: 0;
    max-width: 1200px;
    margin: 30px auto;
    box-shadow: 
        0 0 60px rgba(234, 84, 85, 0.3),
        0 20px 40px rgba(0, 0, 0, 0.5),
        inset 0 0 60px rgba(234, 84, 85, 0.05);
    position: relative;
    overflow: hidden;
}

.content-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, 
        rgba(234, 84, 85, 0.1) 0%, 
        transparent 70%);
    animation: rotateGradient 10s linear infinite;
}

@keyframes rotateGradient {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.content-box > * {
    position: relative;
    z-index: 1;
}

/* Enhanced Code Examples */
.code-example {
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.7) 0%, 
        rgba(0, 0, 0, 0.5) 100%);
    border: 3px solid var(--tertiary);
    padding: 40px;
    font-family: 'Courier Prime', monospace;
    font-size: 28px;
    color: var(--secondary);
    margin: 30px 0;
    text-align: left;
    line-height: 1.8;
    max-width: 900px;
    box-shadow: 
        0 0 40px rgba(234, 84, 85, 0.3),
        0 10px 30px rgba(0, 0, 0, 0.5),
        inset 0 0 40px rgba(234, 84, 85, 0.05);
    position: relative;
}

.code-example::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, 
        var(--tertiary) 0%, 
        transparent 100%);
    box-shadow: 0 0 10px var(--glow);
}

/* Enhanced Icon Cards */
.icon-card {
    background: linear-gradient(135deg, 
        rgba(249, 245, 235, 0.08) 0%, 
        rgba(249, 245, 235, 0.03) 100%);
    border: 3px solid var(--tertiary);
    padding: 50px 40px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.icon-card::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, 
        rgba(234, 84, 85, 0.2) 0%, 
        transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
    border-radius: 50%;
}

.icon-card:hover::before {
    width: 300px;
    height: 300px;
}

.icon-card:hover {
    transform: translateY(-15px) scale(1.05);
    box-shadow: 
        0 30px 60px rgba(234, 84, 85, 0.4),
        0 0 60px var(--glow),
        inset 0 0 30px rgba(234, 84, 85, 0.1);
    border-color: var(--primary);
}

/* Enhanced Navigation */
.nav-btn {
    background: linear-gradient(135deg, 
        var(--tertiary) 0%, 
        #c43e3f 100%);
    color: var(--primary);
    border: none;
    width: 70px;
    height: 70px;
    font-size: 32px;
    font-family: 'VT323', monospace;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 
        0 6px 0 rgba(196, 62, 63, 0.8),
        0 0 30px rgba(234, 84, 85, 0.4);
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.3), 
        transparent);
    transition: left 0.5s;
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 10px 0 rgba(196, 62, 63, 0.8),
        0 0 50px var(--glow),
        0 15px 40px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, 
        var(--primary) 0%, 
        var(--secondary) 100%);
    color: var(--accent);
}

.nav-btn:active {
    transform: translateY(2px);
    box-shadow: 
        0 2px 0 rgba(196, 62, 63, 0.8),
        0 0 30px var(--glow);
}

/* Enhanced Slide Counter */
.slide-counter {
    position: fixed;
    bottom: 50px;
    left: 50px;
    font-size: 40px;
    color: var(--tertiary);
    z-index: 100;
    font-family: 'VT323', monospace;
    background: linear-gradient(135deg, 
        rgba(0, 43, 91, 0.8) 0%, 
        rgba(0, 64, 128, 0.8) 100%);
    padding: 15px 25px;
    border: 3px solid var(--tertiary);
    box-shadow: 
        0 6px 0 rgba(234, 84, 85, 0.3),
        0 0 40px rgba(234, 84, 85, 0.3),
        inset 0 0 20px rgba(234, 84, 85, 0.1);
}

/* Enhanced Cursor */
.cursor {
    display: inline-block;
    width: 20px;
    height: 40px;
    background: var(--tertiary);
    animation: blink 1s infinite, cursorGlow 2s ease-in-out infinite;
    margin-left: 10px;
    box-shadow: 0 0 20px var(--glow);
}

@keyframes cursorGlow {
    0%, 100% { box-shadow: 0 0 20px var(--glow); }
    50% { box-shadow: 0 0 40px var(--glow); }
}

/* Enhanced Highlight */
.highlight {
    color: var(--tertiary);
    background: linear-gradient(135deg, 
        rgba(234, 84, 85, 0.3) 0%, 
        rgba(234, 84, 85, 0.15) 100%);
    padding: 5px 15px;
    border: 2px solid var(--tertiary);
    box-shadow: 
        0 0 20px rgba(234, 84, 85, 0.3),
        inset 0 0 10px rgba(234, 84, 85, 0.1);
}

/* Content List Items Enhanced */
.content-list li {
    margin: 25px 0;
    padding-left: 60px;
    position: relative;
    animation: fadeInUp 0.5s forwards;
    opacity: 0;
    transition: all 0.3s;
}

.content-list li:hover {
    transform: translateX(10px);
    color: var(--tertiary);
}

/* Two Column Enhanced */
.column h4 {
    font-size: 48px;
    color: var(--tertiary);
    margin-bottom: 35px;
    border-bottom: 3px solid var(--tertiary);
    padding-bottom: 20px;
    text-shadow: 0 0 20px var(--glow);
    position: relative;
}

.column h4::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--tertiary);
    box-shadow: 0 0 15px var(--glow);
}

.column ul li::before {
    content: '▸';
    color: var(--tertiary);
    margin-right: 20px;
    font-size: 36px;
    text-shadow: 0 0 10px var(--glow);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .slide h1 {
        font-size: 80px;
    }
    
    .slide h2 {
        font-size: 60px;
    }
    
    .content-list {
        font-size: 28px;
    }
    
    .two-column {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .icon-grid-layout {
        grid-template-columns: repeat(2, 1fr);
        gap: 35px;
    }
    
    .overview-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 30px;
    }
    
    .slide {
        padding: 80px 60px;
    }
}

@media (max-width: 768px) {
    .slide {
        padding: 60px 30px;
    }
    
    .slide h1 {
        font-size: 60px;
    }
    
    .slide h2 {
        font-size: 40px;
    }
    
    .content-list {
        font-size: 24px;
        line-height: 2;
    }
    
    .content-box {
        padding: 30px;
        margin: 20px auto;
    }
    
    .icon-grid-layout {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .controls-panel {
        gap: 10px;
        top: 20px;
        right: 20px;
    }
    
    .control-btn {
        width: 45px;
        height: 45px;
        font-size: 20px;
    }
    
    .navigation {
        bottom: 30px;
        right: 30px;
        gap: 15px;
    }
    
    .nav-btn {
        width: 60px;
        height: 60px;
        font-size: 28px;
    }
    
    .slide-counter {
        bottom: 30px;
        left: 30px;
        font-size: 32px;
        padding: 12px 20px;
    }
    
    .modal-header h2 {
        font-size: 32px;
    }
    
    .modal-body {
        padding: 30px;
    }
    
    .shortcut-grid {
        grid-template-columns: 1fr;
    }
    
    .overview-header h2 {
        font-size: 40px;
    }
    
    .overview-grid {
        padding: 30px;
        grid-template-columns: 1fr;
    }
}

/* Additional transition effects with original code preserved */
.slide[data-transition="slide"] {
    /* Default slide transition */
}

.slide[data-transition="fade"] {
    transition: opacity 0.6s ease;
}

.slide[data-transition="fade"].active {
    transform: translateX(0);
}

.slide[data-transition="fade"].prev {
    transform: translateX(0);
}

.slide[data-transition="zoom"] {
    transform: scale(0.8);
}

.slide[data-transition="zoom"].active {
    transform: scale(1);
}

.slide[data-transition="zoom"].prev {
    transform: scale(1.2);
}

.slide[data-transition="rotate"] {
    transform: rotate(-10deg) scale(0.8);
}

.slide[data-transition="rotate"].active {
    transform: rotate(0deg) scale(1);
}

.slide[data-transition="rotate"].prev {
    transform: rotate(10deg) scale(0.8);
}

.slide[data-transition="flip"] {
    transform: rotateY(-90deg);
    transform-style: preserve-3d;
}

.slide[data-transition="flip"].active {
    transform: rotateY(0deg);
}

.slide[data-transition="flip"].prev {
    transform: rotateY(90deg);
}

/* Icon styles preserved from original */
.icon {
    display: inline-block;
    width: 40px;
    height: 40px;
    position: absolute;
    left: 0;
    top: 5px;
}

.icon-terminal {
    border: 3px solid var(--tertiary);
    position: relative;
    box-shadow: 0 0 10px var(--glow);
}
.icon-terminal::before {
    content: '>';
    position: absolute;
    color: var(--tertiary);
    font-size: 30px;
    left: 8px;
    top: 2px;
    text-shadow: 0 0 10px var(--glow);
}

.icon-font {
    border: 3px solid var(--tertiary);
    position: relative;
    box-shadow: 0 0 10px var(--glow);
}
.icon-font::before {
    content: 'A';
    position: absolute;
    color: var(--tertiary);
    font-size: 28px;
    font-weight: bold;
    left: 8px;
    top: 0;
    text-shadow: 0 0 10px var(--glow);
}

.icon-code {
    position: relative;
}
.icon-code::before,
.icon-code::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 3px;
    background: var(--tertiary);
    box-shadow: 0 0 8px var(--glow);
}
.icon-code::before {
    transform: rotate(45deg);
    left: 0;
    top: 12px;
}
.icon-code::after {
    transform: rotate(-45deg);
    right: 0;
    top: 12px;
}

.icon-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
}
.icon-grid::before,
.icon-grid::after {
    content: '';
    background: var(--tertiary);
    width: 16px;
    height: 16px;
    box-shadow: 0 0 8px var(--glow);
}

.icon-box {
    border: 3px solid var(--tertiary);
    position: relative;
    box-shadow: 0 0 10px var(--glow);
}
.icon-box::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--tertiary);
    left: 7px;
    top: 7px;
    box-shadow: 0 0 8px var(--glow);
}

.icon-star {
    position: relative;
}
.icon-star::before {
    content: '★';
    position: absolute;
    color: var(--tertiary);
    font-size: 35px;
    left: 2px;
    top: -2px;
    text-shadow: 0 0 15px var(--glow);
}

.icon-arrow {
    position: relative;
}
.icon-arrow::before {
    content: '';
    position: absolute;
    width: 30px;
    height: 3px;
    background: var(--tertiary);
    left: 5px;
    top: 18px;
    box-shadow: 0 0 8px var(--glow);
}
.icon-arrow::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 3px;
    background: var(--tertiary);
    right: 5px;
    top: 12px;
    transform: rotate(45deg);
    box-shadow: 0 0 8px var(--glow);
}

.icon-layers {
    position: relative;
}
.icon-layers::before,
.icon-layers::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 3px;
    background: var(--tertiary);
    box-shadow: 0 0 8px var(--glow);
}
.icon-layers::before {
    top: 10px;
    left: 5px;
}
.icon-layers::after {
    top: 20px;
    left: 5px;
}

.icon-plus {
    position: relative;
}
.icon-plus::before,
.icon-plus::after {
    content: '';
    position: absolute;
    background: var(--tertiary);
    box-shadow: 0 0 8px var(--glow);
}
.icon-plus::before {
    width: 3px;
    height: 30px;
    left: 18px;
    top: 5px;
}
.icon-plus::after {
    width: 30px;
    height: 3px;
    left: 5px;
    top: 18px;
}

/* Grid layout and other utilities preserved */
.icon-grid-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 50px;
    max-width: 1100px;
    margin: 50px auto;
}

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    max-width: 1400px;
    margin: 50px auto;
}

.column {
    text-align: left;
}

.column ul {
    list-style: none;
    font-size: 32px;
    line-height: 2.2;
}

.modal-body {
    padding: 50px;
}

.shortcut-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.shortcut-item span {
    font-size: 26px;
    color: var(--secondary);
    line-height: 1.4;
}

.overview-container.active {
    display: block;
}

.overview-grid {
    padding: 50px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 40px;
}

.overview-slide-content {
    font-size: 26px;
    color: var(--secondary);
    line-height: 1.5;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
    z-index: 1;
}

.overview-slide h2,
.overview-slide h3 {
    font-size: 30px;
    color: var(--tertiary);
    margin-bottom: 12px;
    text-shadow: 0 0 15px var(--glow);
}

.content-list {
    list-style: none;
    font-size: 36px;
    line-height: 2.2;
    color: var(--primary);
}

.content-list li:nth-child(1) { animation-delay: 0.1s; }
.content-list li:nth-child(2) { animation-delay: 0.2s; }
.content-list li:nth-child(3) { animation-delay: 0.3s; }
.content-list li:nth-child(4) { animation-delay: 0.4s; }
.content-list li:nth-child(5) { animation-delay: 0.5s; }
.content-list li:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(20px);
    }
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInDown {
    from {
        transform: translateY(-100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.subtitle {
    font-size: 40px;
    color: var(--secondary);
    letter-spacing: 8px;
    text-transform: uppercase;
}

.slide h3 {
    font-size: 60px;
    color: var(--secondary);
    margin-bottom: 30px;
    text-transform: uppercase;
}

.icon-card .big-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    position: relative;
}

.icon-card h4 {
    font-size: 32px;
    color: var(--primary);
    margin-top: 25px;
}

.navigation {
    position: fixed;
    bottom: 50px;
    right: 50px;
    display: flex;
    gap: 25px;
    z-index: 100;
}

.code-example .keyword {
    color: var(--tertiary);
    text-shadow: 0 0 10px var(--glow);
}

.code-example .property {
    color: var(--primary);
}

.code-example .comment {
    color: var(--secondary);
    opacity: 0.7;
}

/* Control button icons preserved */
.icon-grid-small {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
    width: 20px;
    height: 20px;
}

.icon-grid-small::before,
.icon-grid-small::after {
    content: '';
    background: currentColor;
    width: 8px;
    height: 8px;
}

.icon-fullscreen {
    width: 20px;
    height: 20px;
    border: 2px solid currentColor;
    position: relative;
}

.icon-fullscreen::before,
.icon-fullscreen::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    border: 2px solid currentColor;
}

.icon-fullscreen::before {
    top: -2px;
    left: -2px;
    border-bottom: none;
    border-right: none;
}

.icon-fullscreen::after {
    bottom: -2px;
    right: -2px;
    border-top: none;
    border-left: none;
}

.icon-play {
    width: 0;
    height: 0;
    border-left: 12px solid currentColor;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

.control-btn.active .icon-play {
    border-left: none;
    border-top: none;
    border-bottom: none;
    width: 12px;
    height: 16px;
    border-left: 4px solid currentColor;
    border-right: 4px solid currentColor;
}

.icon-help {
    font-size: 24px;
    font-weight: bold;
}

.icon-transition {
    font-size: 24px;
    transition: transform 0.3s;
}