:root {
    --bg: #0a0a0c;
    --glass: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.1);
    --primary: #9d50bb;
    --secondary: #6e48aa;
    --accent: #00d2ff;
    --text: #ffffff;
    --text-dim: #a0a0a0;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    background: linear-gradient(90deg, rgba(10, 10, 12, 0.95), rgba(10, 10, 12, 0.8));
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(18px);
}

.top-nav-inner {
    padding: 12px 10%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.top-nav-logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-dim);
    font-size: 14px;
}

.top-nav-links {
    display: flex;
    gap: 20px;
    font-size: 14px;
}

.top-nav-links a {
    color: var(--accent);
    text-decoration: none;
}

.top-nav-links a:hover {
    text-decoration: underline;
}

h1,
h2,
h3 {
    font-family: 'Outfit', sans-serif;
}

.presentation-container {
    width: 100%;
}

.slide {
    min-height: 100vh;
    padding: 80px 10%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    border-bottom: 1px solid var(--border);
    page-break-after: always;
}

.background-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    filter: blur(120px);
    opacity: 0.2;
    z-index: -1;
}

.badge {
    background: var(--glass);
    border: 1px solid var(--border);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 24px;
    display: inline-block;
}

.section-tag {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 14px;
    font-weight: 800;
    margin-bottom: 16px;
    display: block;
}

h1 {
    font-size: 100px;
    line-height: 0.9;
    font-weight: 800;
    margin-bottom: 24px;
}

.big-title {
    font-size: 80px;
    line-height: 1.1;
    margin-bottom: 40px;
}

h2 {
    font-size: 56px;
    margin-bottom: 48px;
    font-weight: 800;
}

.gradient-text {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 24px;
    color: var(--text-dim);
    max-width: 600px;
}

.highlight-text {
    font-size: 24px;
    line-height: 1.6;
    color: var(--text-dim);
    border-left: 2px solid var(--primary);
    padding-left: 30px;
    margin-bottom: 40px;
}

.divider {
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin: 40px 0;
}

.card {
    padding: 32px;
    border-radius: 24px;
    border: 1px solid var(--border);
    margin-bottom: 16px;
}

.glass {
    background: var(--glass);
    backdrop-filter: blur(20px);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.pillars-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.pillar .icon {
    font-size: 40px;
    margin-bottom: 24px;
}

.code-slide pre {
    padding: 40px;
    border-radius: 16px;
    font-size: 18px;
    line-height: 1.6;
    overflow-x: auto;
}

.highlight-box {
    border-left: 4px solid var(--accent);
    padding: 24px;
    background: rgba(0, 210, 255, 0.05);
    margin: 24px 0;
    border-radius: 0 16px 16px 0;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin: 40px 0;
}

.comparison-table th {
    text-align: left;
    padding: 20px;
    border-bottom: 2px solid var(--border);
    color: var(--text-dim);
    font-size: 14px;
    text-transform: uppercase;
}

.comparison-table td {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.check {
    color: #00ff88;
}

.cross {
    color: #ff4d4d;
}

.doc-links a {
    color: var(--accent);
    text-decoration: none;
}
.doc-links a:hover {
    text-decoration: underline;
}

/* Inline code (no inside pre) */
:not(pre) > code {
    background: rgba(0, 210, 255, 0.1);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
}

.conclusion {
    text-align: center;
    align-items: center;
}

.conclusion p {
    font-size: 28px;
    max-width: 800px;
    color: var(--text-dim);
}

.footer {
    position: absolute;
    bottom: 40px;
    color: var(--text-dim);
    font-size: 14px;
}

/* Animations */
.animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate.visible {
    opacity: 1;
    transform: translateY(0);
}

@media print {
    .slide {
        border: none;
        height: 100vh;
    }
}