:root {
  --bg: #0b0b12;
  --panel: #15151f;
  --line: #2a2a3a;
  --text: #f2f2f7;
  --muted: #9a9ab0;
  --accent: #ff9f0a;
  --accent-2: #ff375f;
  --ok: #30d158;
  --warn: #ffd60a;
  --err: #ff453a;
  --ease: cubic-bezier(.22, .8, .24, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); overflow: hidden; }
body { font: 32px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }

/* The deck is laid out at 1600x900 and scaled to fit any screen. */
.viewport { position: fixed; inset: 0; background: radial-gradient(ellipse at 80% 0%, #2a1530 0%, var(--bg) 55%); }
.deck { position: absolute; left: 50%; top: 50%; width: 1600px; height: 900px; transform-origin: center; }

.slide {
  position: absolute; inset: 0;
  padding: 90px 120px;
  display: flex; flex-direction: column; justify-content: center;
  opacity: 0; visibility: hidden;
  transform: translateX(60px);
  transition: opacity .55s var(--ease), transform .55s var(--ease), visibility 0s .55s;
}
.slide.past { transform: translateX(-60px); }
.slide.active {
  opacity: 1; visibility: visible; transform: none;
  transition: opacity .55s var(--ease), transform .55s var(--ease), visibility 0s;
}

.instant .slide { transition: none; }

/* Content rises in, one block after another, on each new slide. */
.stagger > * { opacity: 0; transform: translateY(18px); }
.active .stagger > * { animation: rise .6s var(--ease) forwards; }
.active .stagger > *:nth-child(2) { animation-delay: .08s; }
.active .stagger > *:nth-child(3) { animation-delay: .16s; }
.active .stagger > *:nth-child(4) { animation-delay: .24s; }
.active .stagger > *:nth-child(5) { animation-delay: .32s; }
@keyframes rise { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .slide, .slide.active { transition: opacity .2s; transform: none; }
  .stagger > *, .active .stagger > * { animation: none; opacity: 1; transform: none; }
}

/* Type */
.kicker { margin: 0 0 18px; color: var(--accent); font-weight: 700; letter-spacing: .14em; text-transform: uppercase; font-size: 24px; }
h1 { font-size: 104px; line-height: 1.02; margin: 0 0 32px; letter-spacing: -.02em; }
h2 { font-size: 68px; line-height: 1.08; margin: 0 0 40px; letter-spacing: -.01em; }
h3 { font-size: 30px; margin: 0 0 16px; color: var(--muted); font-weight: 600; }
em { font-style: normal; background: linear-gradient(90deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 38px; color: var(--muted); margin: 0 0 24px; max-width: 1100px; }
.lead b { color: var(--text); }
.note { color: var(--muted); margin: 36px 0 0; }
.try { margin: 32px 0 0; color: var(--muted); font-size: 28px; }
.try b { color: var(--accent); font-weight: 600; }
.small-label { color: var(--muted); font-size: 24px; margin: 0 0 12px; }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }

/* Title slide */
.title-slide { justify-content: flex-end; padding-bottom: 120px; }
.speaker { display: flex; align-items: center; gap: 28px; margin-top: 56px; }
.avatar { width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; font-size: 36px; color: #1a1000; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.name { margin: 0; font-size: 40px; font-weight: 700; }
.role { margin: 0; font-size: 30px; color: var(--muted); }

/* Agenda */
.agenda { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 22px 80px; }
.agenda li { font-size: 38px; display: flex; gap: 24px; align-items: baseline; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.agenda span { color: var(--accent); font-weight: 700; font-size: 26px; font-variant-numeric: tabular-nums; }

/* Code */
pre {
  margin: 0; padding: 36px 44px; background: #0f0f18; border: 1px solid var(--line); border-radius: 22px;
  font-size: 27px; line-height: 1.55; overflow: hidden; white-space: pre;
}
pre .c { color: #6c6c85; font-style: italic; }
pre .s { color: #ffd60a; }
pre .k { color: #ff7ab2; }
pre .n { color: #64d2ff; }
pre.sms { font-size: 26px; }

/* Layouts */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.two-col pre { font-size: 21px; padding: 30px 30px; }
.two-col.wide-left { grid-template-columns: 1.45fr 1fr; }
.two-col.wide-left pre { font-size: 23px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 36px 40px; }
.panel.glow { border-color: transparent; background: linear-gradient(var(--panel), var(--panel)) padding-box, linear-gradient(135deg, var(--accent), var(--accent-2)) border-box; border: 2px solid transparent; }
.ticks { list-style: none; padding: 0; margin: 0; }
.ticks li { padding: 8px 0 8px 40px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 4px; top: 24px; width: 14px; height: 14px; border-radius: 50%; background: var(--accent); }

.split { flex-direction: row; align-items: center; gap: 80px; }
.split > .stagger { flex: 1; }
.qr-frame { flex: none; background: #fff; padding: 28px; border-radius: 28px; box-shadow: 0 30px 80px #0008; }
.qr { width: 400px; height: 400px; }
.qr img, .qr canvas { width: 100%; height: 100%; display: block; }
.url { font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--accent); font-size: 30px; margin: 32px 0 0; overflow-wrap: anywhere; }

.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tile { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 28px 30px; display: flex; flex-direction: column; gap: 12px; }
.tile b { font-size: 32px; }
.tile code { font-size: 17px; color: #64d2ff; white-space: nowrap; }
.tile span { font-size: 22px; color: var(--muted); }

.support { width: 100%; border-collapse: collapse; font-size: 28px; }
.support th { text-align: left; color: var(--muted); font-weight: 600; font-size: 24px; padding: 0 20px 14px; }
.support td { padding: 18px 20px; border-top: 1px solid var(--line); }
.support td.y, .support td.m, .support td.n { font-weight: 700; white-space: nowrap; }
.support .y { color: var(--ok); }
.support .m { color: var(--warn); }
.support .n { color: var(--err); }
.rules { list-style: none; padding: 0; margin: 44px 0 0; display: flex; gap: 24px; }
.rules li { flex: 1; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 22px 28px; font-size: 28px; }
.rules b { color: var(--accent); }

.takeaways { margin: 0; padding: 0; list-style: none; counter-reset: t; }
.takeaways li { counter-increment: t; position: relative; padding: 0 0 36px 100px; font-size: 36px; color: var(--muted); }
.takeaways li b { color: var(--text); display: block; font-size: 44px; }
.takeaways li::before { content: counter(t); position: absolute; left: 0; top: 0; width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; color: #1a1000; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }

.links { display: grid; grid-template-columns: auto 1fr; gap: 16px 32px; margin: 40px 0 0; font-size: 30px; }
.links dt { color: var(--muted); }
.links dd { margin: 0; font-family: ui-monospace, "SF Mono", Menlo, monospace; color: var(--accent); overflow-wrap: anywhere; }

/* HUD */
.hud { position: fixed; left: 0; right: 0; bottom: 0; display: flex; align-items: center; gap: 16px; padding: 0 20px 14px; pointer-events: none; transition: opacity .4s; }
.hud.idle { opacity: 0; }
.progress { flex: 1; height: 3px; background: #ffffff14; border-radius: 3px; overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .55s var(--ease); }
#counter { color: var(--muted); font: 13px/1 system-ui, sans-serif; font-variant-numeric: tabular-nums; }