* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #0a0a0a;
    --text: #fafafa;
    --text-muted: #a1a1aa;
    --text-dim: #71717a;
    --blue: #3b82f6;
    --green: #10b981;
    --orange: #f97316;
    --purple: #8b5cf6;
    --red: #ef4444;
    --border: #27272a;
    --card: #141414;
}
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    overflow: hidden;
}
.presentation { width: 100vw; height: 100vh; position: relative; }
.slide {
    display: none;
    width: 100%;
    height: 100%;
    padding: 50px 70px;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
    overflow-y: auto;
}
.slide::after {
    content: "© 2026 Aishwarya Naresh Reganti & Kiriti Badam. All rights reserved. Do not copy or distribute without permission.";
    position: absolute;
    bottom: 12px;
    right: 20px;
    font-size: 12px;
    color: rgba(180, 80, 80, 0.6);
    letter-spacing: 0.2px;
}
.slide.active { display: flex; opacity: 1; }

.slide-title { flex-direction: column; justify-content: center; align-items: center; text-align: center; }
.slide-title h1 { font-size: 4rem; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 1rem; line-height: 1.1; }
.slide-title .subtitle { font-size: 1.5rem; color: var(--text-muted); font-weight: 400; }

.slide-statement { flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 60px 100px; }
.slide-statement h2 { font-size: 3.25rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.25; max-width: 1000px; }
.slide-statement .small { font-size: 1.2rem; color: var(--text-muted); margin-top: 1.5rem; max-width: 750px; line-height: 1.7; }

.slide-stat { flex-direction: column; justify-content: center; align-items: center; text-align: center; }
.slide-stat .num { font-size: 11rem; font-weight: 800; line-height: 1; letter-spacing: -0.05em; }
.slide-stat .num.gradient { background: linear-gradient(135deg, var(--blue), var(--purple)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.slide-stat .num.blue { color: var(--blue); }
.slide-stat .num.green { color: var(--green); }
.slide-stat .num.orange { color: var(--orange); }
.slide-stat .num.red { color: var(--red); }
.slide-stat .num.purple { color: var(--purple); }
.slide-stat .label { font-size: 1.75rem; color: var(--text-muted); margin-top: 1rem; font-weight: 500; max-width: 600px; }
.slide-stat .context { font-size: 1.1rem; color: var(--text-dim); margin-top: 1.5rem; max-width: 600px; line-height: 1.6; }

.slide-section { flex-direction: column; justify-content: center; align-items: center; text-align: center; }
.slide-section .label { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.15em; margin-bottom: 1rem; font-weight: 600; }
.slide-section h2 { font-size: 3rem; font-weight: 700; letter-spacing: -0.02em; }
.slide-section .sub { font-size: 1.1rem; color: var(--text-muted); margin-top: 0.5rem; }
.slide-section .framework-container { margin-top: 1.5rem; width: 100%; }
.slide-section .framework-svg { max-width: 100%; width: 1000px; }

.slide-vs { flex-direction: row; justify-content: center; align-items: center; gap: 50px; }
.vs-box { flex: 1; max-width: 380px; padding: 35px; border-radius: 16px; text-align: center; }
.vs-box.old { background: rgba(239, 68, 68, 0.1); border: 2px solid rgba(239, 68, 68, 0.3); }
.vs-box.new { background: rgba(16, 185, 129, 0.1); border: 2px solid rgba(16, 185, 129, 0.3); }
.vs-box .tag { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 1rem; font-weight: 600; }
.vs-box.old .tag { color: var(--red); }
.vs-box.new .tag { color: var(--green); }
.vs-box h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 0.75rem; }
.vs-box p { color: var(--text-muted); font-size: 1rem; }
.vs-arrow { font-size: 2.5rem; color: var(--text-dim); }

.slide-content { flex-direction: column; }
.slide-content h2 { font-size: 2rem; font-weight: 700; margin-bottom: 1.5rem; letter-spacing: -0.02em; }
.slide-content .body { flex: 1; display: flex; gap: 40px; }
.slide-content .text { flex: 1; font-size: 1.1rem; line-height: 1.75; }
.slide-content .text p { margin-bottom: 1rem; }
.slide-content .text ul { list-style: none; margin: 1rem 0; }
.slide-content .text li { padding-left: 1.5rem; position: relative; margin-bottom: 0.6rem; }
.slide-content .text li::before { content: "→"; position: absolute; left: 0; color: var(--blue); }
.slide-content .visual { flex: 1; display: flex; justify-content: center; align-items: center; }
.slide-content .visual img { max-width: 100%; max-height: 480px; border-radius: 12px; box-shadow: 0 20px 50px rgba(0,0,0,0.5); }

.slide-visual { flex-direction: column; justify-content: center; align-items: center; }
.slide-visual h2 { font-size: 1.6rem; font-weight: 600; margin-bottom: 1.5rem; text-align: center; }
.slide-visual img { max-width: 85%; max-height: 65vh; border-radius: 12px; box-shadow: 0 20px 50px rgba(0,0,0,0.5); }
.slide-visual .caption { font-size: 0.9rem; color: var(--text-dim); margin-top: 1.25rem; text-align: center; max-width: 700px; }

.slide-quote { flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 60px 100px; }
.slide-quote blockquote { font-size: 2.25rem; font-weight: 500; line-height: 1.4; max-width: 1100px; font-style: italic; }
.slide-quote .attr { font-size: 1rem; color: var(--text-muted); margin-top: 2rem; }

.slide-list { flex-direction: column; }
.slide-list h2 { font-size: 2rem; font-weight: 700; margin-bottom: 1.5rem; }
.slide-list ul { list-style: none; font-size: 1.35rem; line-height: 2; }
.slide-list li { padding-left: 1.75rem; position: relative; margin-bottom: 0.4rem; }
.slide-list li::before { content: ""; position: absolute; left: 0; top: 0.65em; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); }
.slide-list li.green::before { background: var(--green); }
.slide-list li.orange::before { background: var(--orange); }
.slide-list li.red::before { background: var(--red); }
.slide-list li.purple::before { background: var(--purple); }
.slide-list .subtext { font-size: 1rem; color: var(--text-muted); margin-top: 1.5rem; max-width: 800px; }

.slide-two-col { flex-direction: column; }
.slide-two-col h2 { font-size: 1.85rem; font-weight: 700; margin-bottom: 1.5rem; }
.slide-two-col .cols { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; flex: 1; }
.slide-two-col .col h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.75rem; }
.slide-two-col .col p, .slide-two-col .col li { font-size: 1.05rem; color: var(--text-muted); line-height: 1.65; }
.slide-two-col .col ul { list-style: none; }
.slide-two-col .col li { margin-bottom: 0.6rem; padding-left: 1.5rem; position: relative; }
.slide-two-col .col li::before { content: "→"; position: absolute; left: 0; color: var(--blue); }

.slide-cards { flex-direction: column; }
.slide-cards h2 { font-size: 1.85rem; font-weight: 700; margin-bottom: 1.5rem; }
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cards-grid.two { grid-template-columns: repeat(2, 1fr); }
.cards-grid.four { grid-template-columns: repeat(4, 1fr); }
.cards-grid.stacked { grid-template-columns: 1fr; max-width: 900px; margin: 0 auto; gap: 24px; flex: 1; align-content: center; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.6rem; }
.card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.55; }
.card .card-subtitle { font-size: 0.85rem; font-weight: 500; opacity: 0.85; margin-bottom: 1rem; }
.card ul { margin-top: 0.5rem; padding-left: 1.2rem; }
.card ul li { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.4rem; line-height: 1.5; }

/* Presenter cards - side by side with larger names */
.slide-cards.presenters { justify-content: center; }
.slide-cards.presenters h2 { margin-bottom: 3rem; }
.slide-cards.presenters .cards { display: flex; gap: 50px; justify-content: center; align-items: stretch; }
.slide-cards.presenters .card { flex: 0 1 480px; padding: 40px 48px; }
.slide-cards.presenters .card h3 { font-size: 2rem; margin-bottom: 0.6rem; }
.slide-cards.presenters .card .card-subtitle { font-size: 1.1rem; margin-bottom: 1.5rem; opacity: 0.9; }
.slide-cards.presenters .card ul { padding-left: 1.4rem; }
.slide-cards.presenters .card ul li { font-size: 1rem; margin-bottom: 0.6rem; line-height: 1.5; }

/* Resource slides */
.slide-resources { display: flex; flex-direction: column; padding: 60px 80px; justify-content: center; }
.slide-resources h2 { font-size: 2rem; margin-bottom: 2rem; text-align: center; }
.slide-resources .resources-grid { display: flex; justify-content: center; align-items: flex-end; gap: 40px; flex-wrap: wrap; max-width: 1100px; margin: 0 auto; }
.slide-resources .resource-item { text-align: center; width: 180px; }
.slide-resources .resource-item img { width: 100%; height: 140px; object-fit: contain; border-radius: 8px; margin-bottom: 10px; background: rgba(255,255,255,0.03); padding: 8px; }
.slide-resources .resource-item .qr { height: 100px; background: white; padding: 8px; border-radius: 8px; }
.slide-resources .resource-item p { font-size: 0.85rem; color: var(--text-muted); margin-top: 8px; }
.slide-resources .companies { margin-top: 2rem; text-align: center; font-size: 0.9rem; color: var(--text-muted); }

/* Closing slide with QR codes */
.slide-closing { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 60px; text-align: center; }
.slide-closing h1 { font-size: 2.5rem; margin-bottom: 2rem; }
.slide-closing .qr-grid { display: flex; gap: 60px; justify-content: center; margin-bottom: 2rem; }
.slide-closing .qr-item { text-align: center; }
.slide-closing .qr-item img { width: 180px; height: 180px; background: white; padding: 12px; border-radius: 12px; }
.slide-closing .qr-item p { margin-top: 12px; font-size: 1rem; color: var(--text-muted); }
.slide-closing .discount-note { font-size: 1.2rem; color: var(--text); margin-top: 1.5rem; }
.slide-closing .discount-note strong { color: var(--green); }
.cards-grid.stacked .card { padding: 28px 32px; }
.cards-grid.stacked .card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.cards-grid.stacked .card p { font-size: 1.05rem; line-height: 1.65; }
.card .num { font-size: 2.25rem; font-weight: 700; margin-bottom: 0.4rem; }

.progress-bar { position: fixed; top: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--blue), var(--purple)); transition: width 0.3s; z-index: 1000; }
.nav { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; align-items: center; background: rgba(20,20,20,0.95); padding: 10px 16px; border-radius: 50px; border: 1px solid var(--border); z-index: 1000; backdrop-filter: blur(10px); }
.nav button { background: none; border: none; color: var(--text); cursor: pointer; padding: 6px 14px; border-radius: 20px; font-size: 0.8rem; font-family: inherit; transition: background 0.2s; }
.nav button:hover { background: var(--border); }
.nav .counter { color: var(--text-muted); font-size: 0.8rem; padding: 0 10px; min-width: 70px; text-align: center; }

.blue { color: var(--blue); }
.green { color: var(--green); }
.orange { color: var(--orange); }
.purple { color: var(--purple); }
.red { color: var(--red); }
.muted { color: var(--text-muted); }
.dim { color: var(--text-dim); }

.topic-tag { position: absolute; bottom: 70px; right: 70px; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.12em; font-weight: 600; padding: 6px 14px; border-radius: 20px; background: rgba(255,255,255,0.05); border: 1px solid var(--border); color: var(--text-muted); }
.topic-tag.blue { background: rgba(59, 130, 246, 0.1); border-color: rgba(59, 130, 246, 0.3); color: var(--blue); }
.topic-tag.green { background: rgba(16, 185, 129, 0.1); border-color: rgba(16, 185, 129, 0.3); color: var(--green); }
.topic-tag.orange { background: rgba(249, 115, 22, 0.1); border-color: rgba(249, 115, 22, 0.3); color: var(--orange); }
.topic-tag.purple { background: rgba(139, 92, 246, 0.1); border-color: rgba(139, 92, 246, 0.3); color: var(--purple); }
.topic-tag.red { background: rgba(239, 68, 68, 0.1); border-color: rgba(239, 68, 68, 0.3); color: var(--red); }

.framework-container { margin-top: 2rem; display: flex; justify-content: center; }
.framework-svg { max-width: 1100px; width: 100%; }
.framework-layer { transition: all 0.3s ease; }
.framework-layer.dimmed { opacity: 0.25; }
.highlight-ring { fill: none; stroke: #ef4444; stroke-width: 4; stroke-dasharray: 8 4; opacity: 0; transition: opacity 0.3s ease; }
.highlight-ring.active { opacity: 1; animation: dash 1s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -24; } }

.border-blue { border-left: 4px solid var(--blue); padding-left: 20px; }
.border-green { border-left: 4px solid var(--green); padding-left: 20px; }
.border-orange { border-left: 4px solid var(--orange); padding-left: 20px; }
.border-red { border-left: 4px solid var(--red); padding-left: 20px; }
.border-purple { border-left: 4px solid var(--purple); padding-left: 20px; }

.equation { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 35px; text-align: center; margin: 1.5rem 0; }
.equation .formula { font-size: 2.25rem; font-weight: 700; font-family: 'SF Mono', Monaco, monospace; }
.equation .explain { font-size: 1rem; color: var(--text-muted); margin-top: 1rem; }

.takeaway { background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(59, 130, 246, 0.15)); border: 1px solid rgba(139, 92, 246, 0.3); border-radius: 12px; padding: 24px; margin-top: auto; }
.takeaway h3 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--purple); margin-bottom: 0.75rem; }
.takeaway p { font-size: 1.1rem; font-weight: 500; line-height: 1.6; }

.stats-row { display: flex; gap: 16px; margin: 1.25rem 0; }
.stat-box { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 18px 22px; flex: 1; text-align: center; }
.stat-box .num { font-size: 2rem; font-weight: 700; }
.stat-box .label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }