/* slidesauditorium.fun: a bright lobby around a dark hall. Geist, warm paper, one black glossy primary. */
@font-face { font-family: "Geist"; src: url("Geist-Variable.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }

:root {
  color-scheme: light;
  --paper: oklch(98.9% .003 80);
  --paper-2: oklch(96.6% .004 80);
  --ink: oklch(17% .006 70);
  --ink-2: oklch(44% .008 70);
  --ink-3: oklch(62% .008 70);
  --line: oklch(91% .005 80);
  --night: oklch(15.5% .008 60);
  --night-ink: oklch(96% .004 80);
  --night-ink-2: oklch(72% .008 70);
  --night-line: oklch(28% .008 60);
  --max: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --r: 16px; --r-lg: clamp(16px, 2vw, 28px);
  --ease: cubic-bezier(.22, 1, .36, 1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.55 "Geist", ui-sans-serif, system-ui, -apple-system, sans-serif; letter-spacing: -.01em; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2 { font-weight: 700; letter-spacing: -.045em; line-height: .95; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(48px, 9vw, 112px); }
h2 { font-size: clamp(40px, 6.4vw, 80px); }
.kicker { margin: 0 0 18px; font-size: 13px; font-weight: 550; letter-spacing: .02em; color: var(--ink-3); }
.lede { margin: 24px 0 0; max-width: 34ch; font-size: clamp(18px, 2.1vw, 22px); line-height: 1.45; color: var(--ink-2); text-wrap: pretty; }
kbd { font: 550 12px/1 "Geist", ui-sans-serif, sans-serif; display: inline-grid; place-items: center; min-width: 22px; height: 22px; padding: 0 6px; margin: 0 1px; border-radius: 6px; background: var(--paper); border: 1px solid var(--line); box-shadow: 0 1px 0 var(--line); vertical-align: 1px; }

/* Nav */
.nav { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; padding: 0 var(--gutter); background: color-mix(in oklch, var(--paper) 82%, transparent); backdrop-filter: blur(20px) saturate(1.6); -webkit-backdrop-filter: blur(20px) saturate(1.6); border-bottom: 1px solid color-mix(in oklch, var(--line) 70%, transparent); }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -.02em; text-decoration: none; }
.wordmark img { width: 24px; height: 24px; border-radius: 7px; }
.nav nav { display: flex; align-items: center; gap: clamp(14px, 2.4vw, 28px); font-size: 14px; }
.nav nav a { text-decoration: none; color: var(--ink-2); transition: color .2s var(--ease); }
.nav nav a:hover { color: var(--ink); }
.nav .nav-cta { color: var(--ink); font-weight: 600; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); }

/* Buttons */
.btn, .btn-ghost { display: inline-flex; align-items: center; justify-content: center; height: 54px; padding: 0 26px; border-radius: var(--r); font: 600 16px/1 inherit; font-family: inherit; text-decoration: none; white-space: nowrap; transition: transform .2s var(--ease), filter .2s var(--ease), background .2s var(--ease); }
.btn { position: relative; isolation: isolate; overflow: hidden; color: oklch(99% 0 0); border: 1px solid oklch(8% 0 0);
  background: linear-gradient(180deg, oklch(33% .004 70) 0%, oklch(18% .004 70) 50%, oklch(9% .003 70) 100%);
  box-shadow: inset 0 1px 0 oklch(100% 0 0 / .22), inset 0 -1px 0 oklch(0% 0 0 / .6), 0 1px 2px oklch(0% 0 0 / .2), 0 12px 28px -10px oklch(0% 0 0 / .5); }
.btn::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(105deg, transparent 35%, oklch(100% 0 0 / .14) 50%, transparent 65%); transform: translateX(-120%); animation: shimmer 5s ease-in-out 1.5s infinite; }
@keyframes shimmer { 0%, 72% { transform: translateX(-120%); } 100% { transform: translateX(120%); } }
.btn:hover { filter: brightness(1.14); transform: translateY(-1px); }
.btn:active, .btn-ghost:active { transform: scale(.985); }
.btn-ghost { color: var(--ink); background: var(--paper); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--paper-2); }
[aria-disabled="true"] { cursor: default; }
:focus-visible { outline: 3px solid oklch(60% .01 70); outline-offset: 3px; border-radius: 6px; }
.link-arrow { font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; padding: 14px 6px; }
.link-arrow::after { content: "→"; transition: transform .2s var(--ease); }
.link-arrow:hover::after { transform: translateX(3px); }

/* Hero */
.hero { max-width: var(--max); margin: 0 auto; padding: clamp(64px, 11vw, 140px) var(--gutter) clamp(40px, 6vw, 64px); text-align: center; }
.hero h1 { margin: 0 auto; }
.hero .lede { margin: 28px auto 0; max-width: 40ch; }
.actions { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 12px 20px; margin-top: 40px; }
.hero-shot { max-width: 1280px; margin: 0 auto; padding: 0 var(--gutter); }
.hero-shot img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: var(--r-lg); background: var(--night);
  box-shadow: 0 1px 0 oklch(100% 0 0 / .6) inset, 0 2px 4px oklch(0% 0 0 / .06), 0 40px 80px -24px oklch(15% .01 60 / .45), 0 90px 140px -60px oklch(15% .01 60 / .35); }

/* How */
.how { max-width: var(--max); margin: 0 auto; padding: clamp(72px, 10vw, 128px) var(--gutter); }
.how ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 4vw, 56px); }
.how li { display: grid; gap: 8px; align-content: start; }
.how .num { font-size: 13px; font-weight: 600; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.how b { font-size: 20px; letter-spacing: -.02em; }
.how p { margin: 0; color: var(--ink-2); font-size: 16px; }

/* The hall: one dark band, like walking in */
.night { background: var(--night); color: var(--night-ink); }
.night-inner { max-width: var(--max); margin: 0 auto; padding: clamp(80px, 12vw, 160px) var(--gutter); }
.night .kicker { color: var(--night-ink-2); }
.night .lede { color: var(--night-ink-2); }
.seats { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(12px, 1.6vw, 20px); margin-top: clamp(48px, 7vw, 88px); }
.seats figure { margin: 0; }
.seats .wide { grid-column: 1 / -1; }
.seats img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: var(--r-lg); border: 1px solid var(--night-line); }
.seats figcaption { margin-top: 14px; font-size: 15px; color: var(--night-ink-2); }
.seats figcaption b { color: var(--night-ink); font-weight: 600; margin-right: 6px; }
.truth { margin: clamp(48px, 7vw, 80px) 0 0; max-width: 46ch; font-size: clamp(18px, 2vw, 22px); line-height: 1.45; color: var(--night-ink-2); }
.truth b { color: var(--night-ink); font-weight: 600; }

/* Pro */
.pro { max-width: var(--max); margin: 0 auto; padding: clamp(80px, 12vw, 160px) var(--gutter) 0; }
.ovation { margin: clamp(40px, 6vw, 72px) 0 0; }
.ovation img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--r-lg); box-shadow: 0 40px 80px -36px oklch(15% .01 60 / .45); }
.features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 clamp(32px, 6vw, 96px); margin: clamp(56px, 8vw, 96px) 0 0; }
.features div { padding: 24px 0; border-top: 1px solid var(--line); }
.features dt { font-size: 20px; font-weight: 650; letter-spacing: -.02em; }
.features dd { margin: 6px 0 0; color: var(--ink-2); max-width: 44ch; }
.venues { margin-top: clamp(72px, 10vw, 120px); }
.rail { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(260px, 38%); gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 12px; margin: 0 calc(-1 * var(--gutter)); padding-inline: var(--gutter); scrollbar-width: thin; }
.rail figure { margin: 0; scroll-snap-align: start; }
.rail img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: var(--r); background: var(--night); }
.rail figcaption { margin-top: 12px; font-weight: 600; font-size: 15px; letter-spacing: -.01em; }
.rail figcaption span { margin-left: 6px; font-size: 12px; font-weight: 550; color: var(--ink-3); }

/* Price */
.price { max-width: 960px; margin: 0 auto; padding: clamp(96px, 13vw, 168px) var(--gutter) 0; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.plan { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; padding: clamp(28px, 4vw, 44px); border-radius: var(--r-lg); border: 1px solid var(--line); }
.plan-pro { background: var(--paper-2); border-color: transparent; }
.plan-name { margin: 0; font-weight: 600; color: var(--ink-2); }
.amount { margin: 0; font-size: clamp(48px, 6vw, 64px); font-weight: 700; letter-spacing: -.05em; line-height: 1; display: flex; align-items: baseline; gap: 10px; }
.amount small { font-size: 16px; font-weight: 500; letter-spacing: -.01em; color: var(--ink-2); }
.plan-note { margin: 4px 0 20px; color: var(--ink-2); flex: 1; max-width: 36ch; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; padding: clamp(96px, 13vw, 168px) var(--gutter) 0; }
.faq h2 { font-size: clamp(32px, 4vw, 44px); margin-bottom: 24px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; padding: 22px 0; font-weight: 600; font-size: 18px; letter-spacing: -.015em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--ink-3); font-weight: 400; transition: transform .25s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: -6px 0 24px; color: var(--ink-2); max-width: 62ch; }

/* Footer */
.foot { max-width: var(--max); margin: 0 auto; padding: clamp(96px, 12vw, 140px) var(--gutter) 40px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; font-size: 14px; color: var(--ink-3); }
.foot a { color: var(--ink-2); text-decoration: none; } .foot a:hover { color: var(--ink); }
.foot span:last-child { display: flex; gap: 20px; }

/* Legal / thanks pages */
.doc { max-width: 720px; margin: 0 auto; padding: clamp(56px, 9vw, 112px) var(--gutter) 0; }
.doc h1 { font-size: clamp(40px, 6vw, 64px); }
.doc h2 { font-size: 22px; letter-spacing: -.02em; line-height: 1.2; margin: 40px 0 8px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ol { padding-left: 20px; display: grid; gap: 8px; }

/* Reveal on scroll (script adds .in); without JS or with reduced motion everything is simply visible. */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } .btn::before { animation: none; } html { scroll-behavior: auto; } }

@media (max-width: 820px) {
  .how ol, .features, .price { grid-template-columns: 1fr; }
  .seats { grid-template-columns: 1fr; }
  .rail { grid-auto-columns: 78%; }
  .nav nav a:not(.nav-cta) { display: none; }
}