/* Minimalistic Presentation Styles */

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

:root {
    --primary: #0066CC;
    --secondary: #00AA66;
    --accent: #FF6600;
    --dark: #1E1E1E;
    --light: #F5F5F5;
    --text: #333;
    --code-bg: #282c34;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    background: var(--dark);
    color: var(--text);
    overflow: hidden;
}

.presentation {
    width: 100vw;
    height: 100vh;
    position: relative;
    background: #1e1e1e;
    transition: background 0.6s ease;
}

.slide {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
    background: linear-gradient(to bottom, #ffffff 0%, #f8f9fa 100%);
    padding: 4rem;
    opacity: 0;
    transition: opacity 0.5s ease, background 0.6s ease;
}

.slide.active {
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 1;
    z-index: 1;
}

/* Slide Types */
.slide.title-slide {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-align: center;
    transition: opacity 0.5s ease;
}

.slide.dark {
    background: linear-gradient(to bottom, #2a2a2a 0%, #1e1e1e 100%);
    color: white;
    transition: opacity 0.5s ease, background 0.6s ease;
}

/* Typography */
h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

h2 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--primary);
}

.slide.dark h2,
.slide.title-slide h2 {
    color: white;
}

h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

p {
    font-size: 1.5rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    opacity: 0.9;
}

/* Lists */
ul {
    list-style: none;
    font-size: 1.5rem;
}

ul li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
}

ul li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.slide.dark ul li:before {
    color: var(--secondary);
}

ul li.check:before {
    content: "✓";
    color: var(--secondary);
}

ul li.cross:before {
    content: "✗";
    color: #dc3545;
}

/* Code */
pre {
    background: var(--code-bg);
    color: #abb2bf;
    padding: 2rem;
    border-radius: 8px;
    font-size: 1.2rem;
    overflow-x: auto;
    margin: 1rem 0;
    font-family: 'Fira Code', 'Courier New', monospace;
}

code {
    background: var(--code-bg);
    color: #61afef;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 1.3rem;
}

pre code {
    background: none;
    padding: 0;
}

/* Syntax Highlighting */
.keyword { color: #c678dd; }
.string { color: #98c379; }
.comment { color: #5c6370; font-style: italic; }
.function { color: #61afef; }

/* Diagrams */
.diagram {
    background: var(--light);
    padding: 2rem;
    border-radius: 8px;
    font-family: monospace;
    font-size: 1.2rem;
    margin: 2rem 0;
    border: 2px solid var(--primary);
}

.diagram.center {
    text-align: center;
}

/* Two Column Layout */
.two-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

/* Highlights */
.highlight {
    color: var(--primary);
    font-weight: 600;
}

.accent {
    color: var(--accent);
    font-weight: 600;
}

/* Icons/Emojis */
.emoji {
    font-size: 3rem;
    margin-right: 1rem;
}

/* Navigation Controls */
.controls {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.slide-counter {
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 1rem;
}

.nav-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
}

.nav-btn:hover {
    background: var(--secondary);
}

.nav-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

/* Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: var(--primary);
    z-index: 100;
    transition: width 0.3s ease;
}

/* About/Bio Section */
.bio {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin-top: 2rem;
}

.bio-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary);
}

.bio-text {
    flex: 1;
}

.bio-text p {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.social-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s;
}

.social-links a:hover {
    color: var(--secondary);
}

/* QR Code */
.qr-code {
    text-align: center;
    margin-top: 2rem;
}

.qr-code img {
    max-width: 300px;
    border: 2px solid var(--primary);
    border-radius: 8px;
}

/* Footer */
.slide-footer {
    position: absolute;
    bottom: 2rem;
    left: 4rem;
    font-size: 1rem;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 1.8rem; }
    p, ul li { font-size: 1.3rem; }
    .slide { padding: 3rem; }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide.active h2,
.slide.active h1,
.slide.active p,
.slide.active ul li,
.slide.active pre {
    animation: fadeIn 0.6s ease forwards;
    opacity: 0;
}

.slide.active h1 { animation-delay: 0.2s; }
.slide.active h2 { animation-delay: 0.3s; }
.slide.active h3 { animation-delay: 0.4s; }
.slide.active ul li:nth-child(1) { animation-delay: 0.5s; }
.slide.active ul li:nth-child(2) { animation-delay: 0.6s; }
.slide.active ul li:nth-child(3) { animation-delay: 0.7s; }
.slide.active ul li:nth-child(4) { animation-delay: 0.8s; }
.slide.active ul li:nth-child(5) { animation-delay: 0.9s; }
.slide.active ul li:nth-child(6) { animation-delay: 1.0s; }

/* Help Overlay */
.help-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.9);
    color: white;
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.help-overlay.active {
    display: flex;
}

.help-content {
    background: var(--dark);
    padding: 3rem;
    border-radius: 8px;
    max-width: 600px;
}

.help-content h2 {
    color: white;
    margin-bottom: 2rem;
}

.help-content ul li {
    margin-bottom: 1rem;
}

