/* DoingCamp hub. Warm paper look shared with every track. System fonts: nothing to download. */
:root {
  --paper: #fffaf0;
  --paper-2: #fff3dc;
  --card: #ffffff;
  --ink: #1f2430;
  --ink-soft: #4b5262;
  --line: #e7dcc5;
  --accent: #c2410c;      /* text-safe orange */
  --accent-bg: #f97316;
  --on-accent: #1f2430;
  --cs: #3b82f6;
  --business: #8b5cf6;
  --coding: #ec4899;
  --physics: #0ea5a4;
  --math: #eab308;
  --chemistry: #e5484d;
  --history: #a16207;
  --radius: 18px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #18171a;
    --paper-2: #232127;
    --card: #211f25;
    --ink: #efe9dc;
    --ink-soft: #bdb6a8;
    --line: #3a3740;
    --accent: #fb923c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
}
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

/* Header */
.top { border-bottom: 1px solid var(--line); background: var(--paper); position: sticky; top: 0; z-index: 5; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; text-decoration: none; letter-spacing: -0.01em; }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand b { color: var(--accent); }
.nav { display: flex; gap: 6px; align-items: center; }
.nav a { text-decoration: none; padding: 8px 12px; border-radius: 999px; font-weight: 600; color: var(--ink-soft); }
.nav a:hover { color: var(--ink); background: var(--paper-2); }
.nav .pill { background: var(--ink); color: var(--paper); }
.nav .pill:hover { background: var(--ink); color: var(--paper); opacity: .9; }
@media (max-width: 560px) { .nav .hide-sm { display: none; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 22px; border-radius: 999px; border: 2px solid var(--ink);
  font: 700 17px/1 var(--sans); text-decoration: none; cursor: pointer;
  background: var(--accent-bg); color: var(--on-accent);
}
.btn:hover { filter: brightness(1.05); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn:focus-visible, a:focus-visible, input:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* Hero */
.hero { padding: 64px 0 40px; display: grid; gap: 40px; grid-template-columns: 1.1fr 1fr; align-items: center; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; padding-top: 40px; } }
.eyebrow { font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: .08em; font-size: 14px; margin: 0 0 8px; }
h1 { font-size: clamp(40px, 7vw, 68px); line-height: 1.03; margin: 0 0 18px; letter-spacing: -0.03em; }
h1 em { font-style: normal; color: var(--accent); }
.lede { font-size: 20px; color: var(--ink-soft); margin: 0 0 26px; max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-art { background: var(--paper-2); border: 2px solid var(--ink); border-radius: 24px; padding: 18px; box-shadow: 6px 6px 0 var(--ink); }

/* Sections */
section { padding: 48px 0; }
h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.02em; }
.sub { color: var(--ink-soft); margin: 0 0 28px; font-size: 18px; }

/* Track cards */
.tracks { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.track {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); padding: 22px;
  text-decoration: none; transition: transform .15s, border-color .15s;
}
a.track:hover { transform: translateY(-3px); border-color: var(--c); }
.track .icon { width: 52px; height: 52px; border-radius: 14px; background: var(--c); display: grid; place-items: center; color: #fff; }
.track .icon svg { width: 30px; height: 30px; }
.track h3 { margin: 4px 0 0; font-size: 22px; }
.track p { margin: 0; color: var(--ink-soft); }
.track .go { margin-top: auto; padding-top: 8px; font-weight: 700; color: var(--accent); }
.track .host { font-size: 14px; color: var(--ink-soft); }
.tag { position: absolute; top: 18px; right: 18px; font-size: 13px; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--paper-2); border: 1px solid var(--line); }
.tag.live { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* Waitlist form inside a card */
.wl { display: flex; flex-direction: column; gap: 8px; margin-top: auto; padding-top: 8px; }
.wl label { font-size: 14px; font-weight: 700; }
.wl .row { display: flex; gap: 8px; }
.wl input {
  flex: 1; min-width: 0; min-height: 44px; padding: 10px 12px; border-radius: 12px;
  border: 2px solid var(--line); background: var(--paper); color: var(--ink); font: 16px var(--sans);
}
.wl button { min-height: 44px; padding: 0 16px; border-radius: 12px; border: 2px solid var(--ink); background: var(--ink); color: var(--paper); font: 700 15px var(--sans); cursor: pointer; }
.wl button[disabled] { opacity: .6; cursor: default; }
.wl .msg { font-size: 14px; min-height: 1.4em; margin: 0; color: var(--ink-soft); }
.wl .msg.ok { color: var(--accent); font-weight: 700; }

/* Steps */
.steps { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); counter-reset: s; padding: 0; margin: 0; list-style: none; }
.steps li { background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); padding: 20px; }
.steps li::before { counter-increment: s; content: counter(s); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--accent-bg); color: var(--on-accent); font-weight: 800; margin-bottom: 10px; }
.steps h3 { margin: 0 0 4px; font-size: 19px; }
.steps p { margin: 0; color: var(--ink-soft); }

/* Pass band */
.pass { background: var(--ink); color: var(--paper); border-radius: 24px; padding: 36px; display: grid; gap: 24px; grid-template-columns: 1.4fr 1fr; align-items: center; }
.pass h2 { color: var(--paper); }
.pass p { color: var(--paper); opacity: .85; margin: 0; }
.pass .btn { border-color: var(--paper); }
@media (max-width: 760px) { .pass { grid-template-columns: 1fr; padding: 26px; } }

/* Pricing page */
.price-card { max-width: 560px; margin: 0 auto; background: var(--card); border: 2px solid var(--ink); border-radius: 24px; padding: 32px; box-shadow: 6px 6px 0 var(--ink); }
.price { font-size: 56px; font-weight: 800; letter-spacing: -0.03em; margin: 8px 0 0; }
.price small { font-size: 20px; color: var(--ink-soft); font-weight: 600; }
.ticks { list-style: none; padding: 0; margin: 20px 0 26px; display: grid; gap: 10px; }
.ticks li { padding-left: 32px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 4px; width: 20px; height: 20px; border-radius: 50%; background: var(--accent-bg); }
.ticks li::after { content: ""; position: absolute; left: 6px; top: 8px; width: 7px; height: 10px; border: solid var(--on-accent); border-width: 0 3px 3px 0; transform: rotate(45deg); }
.note { font-size: 15px; color: var(--ink-soft); margin: 14px 0 0; }
.faq { max-width: 720px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { font-weight: 700; cursor: pointer; font-size: 18px; }
.faq p { color: var(--ink-soft); margin: 10px 0 0; }

/* Footer */
footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 28px 0 40px; color: var(--ink-soft); font-size: 15px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }

.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

[data-t="cs"] { --c: var(--cs); }
[data-t="business"] { --c: var(--business); }
[data-t="coding"] { --c: var(--coding); }
[data-t="physics"] { --c: var(--physics); }
[data-t="math"] { --c: var(--math); }
[data-t="chemistry"] { --c: var(--chemistry); }
[data-t="history"] { --c: var(--history); }

/* Hero lamp demo */
.demo-q { margin: 0 0 14px; font-weight: 600; }
.lamps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.lamps button {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 14px 4px;
  min-height: 96px; border-radius: 16px; border: 2px solid var(--ink); background: var(--card); color: var(--ink);
  font: 800 22px var(--sans); cursor: pointer; touch-action: manipulation;
}
.lamps .bulb { width: 34px; height: 34px; border-radius: 50%; background: var(--line); border: 2px solid var(--ink); transition: background .15s, box-shadow .15s; }
.lamps button[aria-pressed="true"] .bulb { background: #facc15; box-shadow: 0 0 18px 4px rgba(250, 204, 21, .7); }
.total { font-size: 22px; margin: 16px 0 4px; }
.total strong { font-size: 34px; color: var(--accent); }
.say { margin: 0; color: var(--ink-soft); min-height: 3.2em; }
.center { text-align: center; margin-inline: auto; }
.btn.full { width: 100%; }

/* login.doingcamp.com */
.auth { max-width: 460px; margin: 0 auto; padding: 48px 0; }
.auth-h { font-size: clamp(34px, 6vw, 46px); margin-bottom: 6px; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 5px; background: var(--paper-2); border: 2px solid var(--line); border-radius: 999px; margin-bottom: 20px; }
.tabs button { min-height: 44px; border: 0; border-radius: 999px; background: transparent; color: var(--ink-soft); font: 700 16px var(--sans); cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--paper); }
.auth-form { display: flex; flex-direction: column; gap: 6px; }
.auth-form label { font-weight: 700; margin-top: 8px; }
.auth-form .hint { font-weight: 400; color: var(--ink-soft); }
.auth-form input { min-height: 48px; padding: 10px 14px; border-radius: 12px; border: 2px solid var(--line); background: var(--card); color: var(--ink); font: 17px var(--sans); }
.auth-form input:focus { border-color: var(--ink); }
.auth-form .btn { margin-top: 16px; }
.auth-form .msg { min-height: 1.5em; margin: 6px 0 0; font-weight: 600; color: #b42318; }
@media (prefers-color-scheme: dark) { .auth-form .msg { color: #fda29b; } }
.acc-card { background: var(--card); border: 2px solid var(--line); border-radius: var(--radius); padding: 20px; display: grid; gap: 6px; justify-items: start; }
.acc-card p { margin: 0; }
.acc-name { font-size: 19px; overflow-wrap: anywhere; }
.acc-name span { color: var(--ink-soft); }
.acc-pass { margin-bottom: 8px !important; }
.acc-h2 { font-size: 24px; margin-top: 28px; }
.acc-tracks { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; }
.acc-tracks a, .acc-tracks .soon { display: flex; justify-content: space-between; gap: 12px; padding: 16px 18px; border: 2px solid var(--line); border-radius: 14px; background: var(--card); font-weight: 700; text-decoration: none; }
.acc-tracks a:hover { border-color: var(--ink); }
.acc-tracks a span { color: var(--accent); }
.acc-tracks .soon { color: var(--ink-soft); }
.acc-tracks .soon span { font-weight: 600; font-size: 14px; }
.track .soon-note { margin-top: auto; padding-top: 8px; font-weight: 700; color: var(--ink-soft); }
.acc-tracks a, .acc-tracks .soon { align-items: center; }