@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Instrument+Serif:ital@0;1&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg: #FBFAF7;
  --surface: #FFFFFF;
  --surface-2: #F4F2EC;
  --ink: #14120F;
  --ink-2: #4B4740;
  --ink-3: #8A857B;
  --border: #E8E4DB;
  --border-strong: #D6D1C4;
  --accent: #5B3DF5;
  --accent-ink: #3E22D4;
  --accent-soft: #EEEAFF;
  --coral: #FF5A3C;
  --coral-soft: #FFE8E2;
  --mint: #19B37A;
  --mint-soft: #DFF7EC;
  --sun: #FFB800;
  --sun-soft: #FFF3CC;
  --sky: #2EA6FF;
  --sky-soft: #E0F1FF;
  --code-bg: #1B1A17;
  --code-ink: #E9E5DA;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(20,18,15,.04), 0 12px 40px -12px rgba(20,18,15,.12);
  --shadow-lg: 0 2px 4px rgba(20,18,15,.04), 0 30px 80px -24px rgba(91,61,245,.25);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif: 'Instrument Serif', Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
code, kbd { font-family: var(--mono); font-size: .88em; }
code { background: var(--surface-2); padding: 2px 7px; border-radius: 6px; border: 1px solid var(--border); }
kbd { background: var(--surface); border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 6px; padding: 1px 7px; font-size: .8em; }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.serif { font-family: var(--serif); font-weight: 400; font-style: italic; letter-spacing: -0.01em; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,250,247,.8);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.03em; color: var(--ink); font-size: 17px; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: conic-gradient(from 210deg, var(--coral), var(--sun), var(--mint), var(--sky), var(--accent), var(--coral));
  position: relative; flex: none;
}
.brand-mark::after { content: ""; position: absolute; inset: 7px; background: var(--bg); border-radius: 4px; transform: rotate(45deg); }
.nav-links { display: flex; gap: 6px; align-items: center; list-style: none; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--ink-2); padding: 8px 12px; border-radius: 999px; }
.nav-links a:hover { background: var(--surface-2); color: var(--ink); text-decoration: none; }
.nav-links a.btn { color: #fff; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--ink); color: #fff !important; border: 0; cursor: pointer;
  padding: 14px 22px; border-radius: 999px; font-weight: 600; font-size: 15px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s;
  text-decoration: none !important;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px -10px rgba(0,0,0,.4); }
.btn:active { transform: translateY(0); }
.btn.primary { background: var(--accent); }
.btn.primary:hover { background: var(--accent-ink); box-shadow: 0 12px 28px -10px rgba(91,61,245,.6); }
.btn.ghost { background: transparent; color: var(--ink) !important; border: 1.5px solid var(--border-strong); }
.btn.ghost:hover { background: var(--surface); box-shadow: none; }
.btn.lg { padding: 18px 28px; font-size: 17px; }
.btn[disabled] { opacity: .6; cursor: progress; transform: none !important; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 96px 0 40px; overflow: visible; }
.hero-bg { position: absolute; inset: -200px 0 0; pointer-events: none; z-index: -1; overflow: hidden; }
.blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; will-change: transform; }
.blob.a { width: 520px; height: 520px; background: #CFC4FF; top: 40px; left: -120px; animation: drift-a 34s ease-in-out infinite; }
.blob.b { width: 460px; height: 460px; background: #FFD5C8; top: 120px; right: -100px; animation: drift-b 41s ease-in-out infinite; }
.blob.c { width: 380px; height: 380px; background: #CFF5E5; top: 420px; left: 40%; animation: drift-c 47s ease-in-out infinite; }
/* Slow, looping wander — each blob on its own period so the pattern never visibly repeats */
@keyframes drift-a {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(70px, 50px) scale(1.08); }
  66%  { transform: translate(30px, 110px) scale(.96); }
  100% { transform: translate(0, 0) scale(1); }
}
@keyframes drift-b {
  0%   { transform: translate(0, 0) scale(1); }
  30%  { transform: translate(-80px, 60px) scale(1.06); }
  65%  { transform: translate(-40px, -50px) scale(1.12); }
  100% { transform: translate(0, 0) scale(1); }
}
@keyframes drift-c {
  0%   { transform: translate(0, 0) scale(1); }
  40%  { transform: translate(-90px, -60px) scale(1.1); }
  70%  { transform: translate(60px, -20px) scale(.94); }
  100% { transform: translate(0, 0) scale(1); }
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: 6px 14px 6px 8px; font-size: 13px; font-weight: 600; color: var(--ink-2);
  box-shadow: var(--shadow);
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px var(--mint-soft); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 3px var(--mint-soft); } 50% { box-shadow: 0 0 0 7px rgba(25,179,122,.12); } }
.eyebrow .tag { background: var(--ink); color: #fff; border-radius: 999px; padding: 2px 9px; font-size: 11px; letter-spacing: .04em; text-transform: uppercase; white-space: nowrap; }
.eyebrow .dot { flex: none; }

.hero h1 {
  margin-top: 26px;
  font-size: clamp(44px, 7.2vw, 92px);
  line-height: .98; letter-spacing: -0.045em; font-weight: 800;
  max-width: 12ch;
}
.hero h1 .serif { font-size: 1.06em; color: var(--accent); }
.hero p.lede { margin-top: 26px; font-size: clamp(18px, 2vw, 21px); color: var(--ink-2); max-width: 56ch; }
.hero-cta { margin-top: 34px; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-facts { margin-top: 44px; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; max-width: 760px; }
.fact { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; box-shadow: var(--shadow); }
.fact b { display: block; font-size: 15px; letter-spacing: -0.01em; }
.fact span { font-size: 13px; color: var(--ink-3); }

/* ---------- Marquee of ideas ---------- */
.marquee { margin: 52px 0 0; padding: 8px 0; overflow: hidden; position: relative; mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; gap: 12px; width: max-content; animation: marquee 110s linear infinite; }
.marquee .chip:hover { transform: translateY(-2px); }
.marquee-track:hover { animation-play-state: paused; }
.marquee + .marquee .marquee-track { animation-direction: reverse; animation-duration: 130s; }
.marquee + .marquee { margin-top: 0; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Idea chips ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: 9px 14px 9px 10px; font-size: 14px; font-weight: 500; color: var(--ink);
  cursor: pointer; box-shadow: var(--shadow); user-select: none;
  transition: transform .15s ease, border-color .15s, box-shadow .15s;
}
.chip:hover { transform: translateY(-2px) rotate(-1deg); border-color: var(--accent); box-shadow: 0 10px 24px -10px rgba(91,61,245,.45); }
.chip:active { transform: scale(.97); }
.chip .em { font-size: 16px; }
.chip[data-tone="coral"] { background: var(--coral-soft); border-color: #FFC9BC; }
.chip[data-tone="mint"] { background: var(--mint-soft); border-color: #B6EBD3; }
.chip[data-tone="sun"] { background: var(--sun-soft); border-color: #FFE08A; }
.chip[data-tone="sky"] { background: var(--sky-soft); border-color: #B8DFFF; }
.chip[data-tone="violet"] { background: var(--accent-soft); border-color: #D2C9FF; }
.chip.added { animation: pop .4s ease; }
@keyframes pop { 30% { transform: scale(1.12); } }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -0.035em; line-height: 1.05; font-weight: 800; }
.section-head p { margin-top: 14px; color: var(--ink-2); font-size: 18px; }
.kicker { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 14px; display: block; }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.card .icon { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; margin-bottom: 16px; }
.card h3 { font-size: 19px; letter-spacing: -0.02em; margin-bottom: 8px; }
.card p { color: var(--ink-2); font-size: 15.5px; }

.agenda { display: grid; gap: 0; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; box-shadow: var(--shadow); }
.agenda-row { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 22px 26px; border-top: 1px solid var(--border); align-items: start; }
.agenda-row:first-child { border-top: 0; }
.agenda-row .t { font-family: var(--mono); font-size: 13px; color: var(--ink-3); padding-top: 4px; }
.agenda-row h4 { font-size: 17px; letter-spacing: -0.01em; }
.agenda-row p { color: var(--ink-2); font-size: 15px; margin-top: 4px; }

/* ---------- Register form ---------- */
.register { position: relative; padding: 80px 0 100px; }
.register-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 40px; align-items: start; }
.register-grid.single { grid-template-columns: 1fr; max-width: 1000px; margin: 0 auto; }
.form-card { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; padding: 38px 40px; box-shadow: var(--shadow-lg); position: relative; }
.form-card h2 { font-size: 30px; letter-spacing: -0.03em; line-height: 1.1; }
.form-card .sub { color: var(--ink-2); margin-top: 8px; font-size: 15.5px; }
.field { margin-top: 24px; }
.field > label, .field > .label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 8px; letter-spacing: -0.005em; }
.field .hint { font-weight: 400; color: var(--ink-3); }
.input {
  width: 100%; background: var(--bg); border: 1.5px solid var(--border); border-radius: 12px;
  padding: 13px 15px; font-size: 16px; outline: none; transition: border-color .15s, box-shadow .15s, background .15s;
}
.input:focus { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 4px var(--accent-soft); }
.input.invalid { border-color: var(--coral); }
textarea.input { min-height: 120px; resize: vertical; line-height: 1.55; }
.error { color: #C8321B; font-size: 13px; margin-top: 6px; display: none; }
.error.show { display: block; }

.options { display: flex; flex-wrap: wrap; gap: 8px; }
.opt { position: relative; }
.opt input { position: absolute; opacity: 0; inset: 0; pointer-events: none; }
.opt span {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  border: 1.5px solid var(--border); background: var(--bg); border-radius: 999px;
  padding: 9px 14px; font-size: 14px; font-weight: 500; transition: all .15s;
}
.opt span:hover { border-color: var(--border-strong); background: #fff; }
.opt input:focus-visible + span { box-shadow: 0 0 0 4px var(--accent-soft); }
.opt input:checked + span { background: var(--ink); color: #fff; border-color: var(--ink); }
.opt.accent input:checked + span { background: var(--accent); border-color: var(--accent); }

.idea-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: stretch; }
.idea-wrap { position: relative; display: flex; }
.idea-wrap textarea { flex: 1; min-height: 320px; }
.idea-wrap .counter { position: absolute; right: 12px; bottom: 10px; font-size: 12px; color: var(--ink-3); }

.submit-row { margin-top: 28px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.submit-row .fine { font-size: 13px; color: var(--ink-3); }
.form-status { margin-top: 14px; font-size: 14px; display: none; padding: 12px 14px; border-radius: 10px; }
.form-status.err { display: block; background: var(--coral-soft); color: #9C2A15; }

/* floating idea playground */
.playground { position: relative; min-height: 320px; border-radius: 16px; border: 1px dashed var(--border-strong); overflow: hidden;
  padding: 18px 14px 46px; display: flex; flex-direction: column; justify-content: center; gap: 18px;
  background: radial-gradient(circle at 30% 20%, rgba(91,61,245,.08), transparent 40%), radial-gradient(circle at 80% 80%, rgba(255,90,60,.08), transparent 40%), var(--surface-2); }
.playground .cloud { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.playground .chip { padding: 7px 11px 7px 8px; font-size: 13px; }
.playground .cloud:nth-child(odd) { padding-inline: 6%; }
.playground .hint-center { text-align: center; padding: 4px 12px; }
.playground .hint-center h3 { font-family: var(--serif); font-style: italic; font-weight: 400; font-size: clamp(20px, 2.2vw, 26px); color: var(--ink); letter-spacing: -0.01em; line-height: 1.1; }
.playground .hint-center p { margin-top: 6px; color: var(--ink-3); font-size: 14px; }
.playground .chip { will-change: transform; animation: float var(--dur, 8s) ease-in-out infinite alternate; animation-delay: var(--delay, 0s); }
@keyframes float { from { transform: translate(0,0) rotate(var(--r0, -2deg)); } to { transform: translate(var(--dx, 6px), var(--dy, -6px)) rotate(var(--r1, 2deg)); } }
.playground .chip:hover { animation-play-state: paused; transform: translateY(-2px) rotate(-1deg); }
.playground .shuffle { position: absolute; right: 10px; bottom: 10px; font-size: 12px; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 8px 14px; cursor: pointer; box-shadow: var(--shadow); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--surface); margin-top: 40px; }
.footer .wrap { padding: 44px 24px; display: grid; gap: 26px; grid-template-columns: 1.4fr 1fr; align-items: end; }
.footer .greet { font-family: var(--serif); font-style: italic; font-size: clamp(26px, 3.4vw, 40px); line-height: 1.1; letter-spacing: -0.01em; min-height: 1.2em; }
.footer .greet .wx { white-space: nowrap; }
.footer .meta { color: var(--ink-3); font-size: 13px; margin-top: 10px; }
.footer .links { display: flex; gap: 18px; justify-content: flex-end; font-size: 14px; flex-wrap: wrap; }
.footer .links a { color: var(--ink-2); }

/* ---------- Guide ---------- */
.guide-hero { padding: 70px 0 30px; }
.guide-hero h1 { font-size: clamp(36px, 5.4vw, 62px); letter-spacing: -0.04em; line-height: 1; font-weight: 800; max-width: 16ch; }
.guide-hero p { margin-top: 18px; color: var(--ink-2); font-size: 18px; max-width: 60ch; }
.welcome { background: linear-gradient(135deg, var(--accent-soft), var(--mint-soft)); border: 1px solid #D2C9FF; border-radius: 16px; padding: 18px 22px; margin-bottom: 26px; display: none; align-items: center; gap: 14px; }
.welcome.show { display: flex; }
.welcome.celebrate { position: relative; overflow: hidden; animation: welcome-pop .7s cubic-bezier(.2,.9,.3,1.3) both; }
.welcome.celebrate::after { content: ""; position: absolute; top: -50%; bottom: -50%; width: 45%; left: -60%; transform: skewX(-20deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.95), transparent); animation: welcome-shine 1.4s .5s ease-in-out 1 both; pointer-events: none; }
.welcome.celebrate .big { display: inline-block; animation: welcome-wiggle 1s .4s ease-in-out 1; }
@keyframes welcome-pop { from { opacity: 0; transform: scale(.92) translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes welcome-shine { from { left: -60%; } to { left: 130%; } }
@keyframes welcome-wiggle { 0%,100% { transform: rotate(0); } 25% { transform: rotate(-14deg) scale(1.15); } 60% { transform: rotate(10deg) scale(1.1); } }
@media (prefers-reduced-motion: reduce) { .welcome.celebrate, .welcome.celebrate::after, .welcome.celebrate .big { animation: none; } }
.welcome .big { font-size: 30px; }
.welcome b { letter-spacing: -0.01em; }

.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 4px; gap: 4px; }
.seg button { border: 0; background: transparent; padding: 9px 18px; border-radius: 999px; font-weight: 600; font-size: 14px; cursor: pointer; color: var(--ink-2); display: inline-flex; gap: 8px; align-items: center; }
.seg button[aria-pressed="true"] { background: var(--ink); color: #fff; box-shadow: var(--shadow); }
.toggles { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; align-items: center; }
.toggles .lbl { font-size: 13px; color: var(--ink-3); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; margin-right: -4px; }

.guide-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; align-items: start; padding-bottom: 80px; }
.toc { position: sticky; top: 84px; font-size: 14px; }
.toc ol { list-style: none; display: grid; gap: 2px; }
.toc a { display: block; padding: 7px 12px; border-radius: 8px; color: var(--ink-2); border-left: 2px solid transparent; }
.toc a:hover { background: var(--surface-2); text-decoration: none; color: var(--ink); }
.toc a { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.toc-state { flex: none; width: 16px; height: 16px; border-radius: 50%; display: none; font-style: normal; font-size: 10px; line-height: 16px; text-align: center; }
.toc a[data-state] .toc-state { display: block; }
.toc a[data-state=""] .toc-state { display: none; }
.toc a[data-state^="todo"] .toc-state { border: 1.5px solid var(--border-strong); }
.toc a[data-state^="partial"] .toc-state { border: 1.5px solid var(--sun); background: linear-gradient(90deg, var(--sun) 50%, transparent 50%); }
.toc a[data-state^="done"] .toc-state { background: var(--mint); color: #fff; }
.toc a[data-state^="done"] .toc-state::before { content: "✓"; font-weight: 700; }
.toc a[data-state$="optional"] .toc-state { opacity: .55; }
.toc a[data-state^="done"] { color: var(--ink-3); }
.toc a.active { color: var(--accent-ink); border-left-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.toc .toc-title { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); padding: 0 12px 10px; }

.guide h2 { font-size: clamp(26px, 3.2vw, 36px); letter-spacing: -0.03em; line-height: 1.1; margin: 64px 0 10px; scroll-margin-top: 90px; }
.guide h2:first-of-type { margin-top: 16px; }
.guide .intro { color: var(--ink-2); font-size: 17px; margin-bottom: 26px; max-width: 64ch; }
.guide p { max-width: 68ch; }
.guide ul, .guide ol { padding-left: 22px; margin: 12px 0; max-width: 66ch; }
.guide li { margin: 6px 0; }
.guide li::marker { color: var(--ink-3); }

.step { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 18px; margin: 26px 0; }
.step-num { width: 40px; height: 40px; border-radius: 12px; background: var(--ink); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 15px; letter-spacing: -0.02em; }
.step-body h3 { font-size: 20px; letter-spacing: -0.02em; margin: 6px 0 8px; }
.step-body p { color: var(--ink-2); margin: 8px 0; }

.codeblock { margin: 14px 0; border-radius: 14px; overflow: hidden; background: var(--code-bg); color: var(--code-ink); border: 1px solid #2B2924; max-width: 100%; }
.codeblock .cb-head { display: flex; justify-content: space-between; align-items: center; padding: 8px 14px; font-size: 12px; color: #A39E91; border-bottom: 1px solid #2B2924; font-family: var(--mono); }
.codeblock .copy { background: transparent; border: 1px solid #3A3731; color: #D2CDC0; border-radius: 6px; padding: 3px 10px; font-size: 12px; cursor: pointer; font-family: var(--font); }
.codeblock .copy:hover { background: #2B2924; }
.codeblock pre { padding: 14px 16px; overflow-x: auto; font-family: var(--mono); font-size: 13.5px; line-height: 1.7; }
.codeblock code { background: transparent; border: 0; padding: 0; font-size: inherit; color: inherit; }
.codeblock .c { color: #8D887C; }
.codeblock .p { color: #7DD3A8; user-select: none; }
.codeblock .k { color: #FFC857; }

.callout { border-radius: 14px; padding: 16px 18px; margin: 16px 0; font-size: 15px; max-width: 68ch; border: 1px solid; display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 10px; }
.callout > div { min-width: 0; }
.callout .codeblock { max-width: 100%; margin: 10px 0; }
.step-body, .guide { min-width: 0; }
.callout > div > b:first-child { display: block; margin-bottom: 2px; }
.callout.note { background: var(--accent-soft); border-color: #D2C9FF; }
.callout.warn { background: var(--sun-soft); border-color: #FFE08A; }
.callout.ok { background: var(--mint-soft); border-color: #B6EBD3; }
.callout.tip { background: var(--sky-soft); border-color: #B8DFFF; }

.choose { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; margin: 22px 0; }
.choose .card { position: relative; cursor: pointer; transition: border-color .15s, box-shadow .15s, transform .15s; padding-top: 50px; }
.choose .card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.choose .card:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--accent-soft); }
.choose .card.selected { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow); }
.choose .check { position: absolute; top: 14px; right: 16px; font-size: 12px; font-weight: 700; color: var(--accent-ink); background: var(--accent-soft); border-radius: 999px; padding: 4px 10px; opacity: 0; transition: opacity .15s; }
.choose .card.selected .check { opacity: 1; }
.choose .card:not(.selected)::after { content: "Click to choose"; position: absolute; top: 14px; right: 16px; font-size: 12px; color: var(--ink-3); }
.switch-tool { font-size: 14px; font-weight: 500; color: var(--ink-3); margin-left: 10px; letter-spacing: 0; vertical-align: middle; border-bottom: 1px dashed var(--border-strong); }
.switch-tool:hover { color: var(--accent-ink); text-decoration: none; border-bottom-color: var(--accent); }
.toggles-note { font-size: 13.5px; color: var(--ink-3); }
.choose .ribbon { position: absolute; top: 14px; left: 22px; background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; }
.choose ul { padding-left: 18px; font-size: 14.5px; color: var(--ink-2); }
.choose .card .btn { margin-top: 16px; padding: 10px 16px; font-size: 14px; }

.done { text-align: center; padding: 44px 24px; border-radius: 24px; background: linear-gradient(135deg, var(--mint-soft), var(--sky-soft)); border: 1px solid #B6EBD3; margin: 48px 0; }
.done .em { font-size: 44px; }
.done h3 { font-size: 26px; letter-spacing: -0.03em; margin-top: 10px; }
.done p { color: var(--ink-2); margin: 8px auto 0; }

table.modes { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 14px 0; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
table.modes th, table.modes td { padding: 11px 14px; text-align: left; border-top: 1px solid var(--border); vertical-align: top; }
table.modes th { background: var(--surface-2); border-top: 0; font-size: 13px; }
.table-scroll { overflow-x: auto; }

details.faq { border-top: 1px solid var(--border); padding: 4px 0; max-width: 72ch; }
details.faq:last-of-type { border-bottom: 1px solid var(--border); }
details.faq summary { cursor: pointer; font-weight: 600; padding: 14px 0; list-style: none; display: flex; justify-content: space-between; gap: 14px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--ink-3); font-size: 20px; line-height: 1; }
details.faq[open] summary::after { content: "–"; }
details.faq p { padding-bottom: 16px; color: var(--ink-2); font-size: 15.5px; }

/* platform / tool visibility */
[data-os="mac"] [data-show="win"], [data-os="win"] [data-show="mac"] { display: none !important; }
[data-tool="claude"] [data-show-tool="codex"], [data-tool="codex"] [data-show-tool="claude"] { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .register-grid { grid-template-columns: 1fr; }
  .guide-layout { grid-template-columns: 1fr; gap: 24px; }
  .toc { position: static; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 6px; }
  .toc a { border-left: 0; border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px; font-size: 13px; background: var(--surface); gap: 6px; }
  .toc-state { width: 13px; height: 13px; line-height: 13px; font-size: 9px; }
  .toc a.active { border-color: var(--accent); }
  .toc .toc-title { display: none; }
  .footer .wrap { grid-template-columns: 1fr; }
  .footer .links { justify-content: flex-start; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav-links a:not(.btn) { display: none; }
  .hero { padding-top: 56px; }
  .eyebrow { font-size: 12px; padding: 5px 12px 5px 6px; gap: 8px; max-width: 100%; }
  .eyebrow .tag { font-size: 10px; padding: 2px 7px; }
  .eyebrow .hide-sm { display: none; }
  .hero h1 { font-size: clamp(40px, 12vw, 56px); }
  .form-card { padding: 24px 18px; border-radius: 18px; }
  .idea-row { grid-template-columns: 1fr; }
  .idea-wrap textarea { min-height: 140px; }
  .idea-wrap { order: 2; }
  .agenda-row { grid-template-columns: 1fr; gap: 4px; }
  .step { grid-template-columns: 34px 1fr; gap: 12px; }
  .step-num { width: 32px; height: 32px; font-size: 13px; border-radius: 9px; }
  .section { padding: 56px 0; }
  .btn.lg { width: 100%; }
  .playground { min-height: 220px; }
}
@media (prefers-reduced-motion: reduce) {
  .blob, .marquee-track, .playground .chip, .eyebrow .dot { animation: none !important; }
}

/* ---------- Prep progress ---------- */
.task-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; align-items: center; }
.task-btn { border: 1.5px solid var(--border-strong); background: var(--surface); border-radius: 999px; padding: 7px 14px; font-size: 13.5px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; transition: background .15s, border-color .15s, color .15s; height: 36px; }
.task-btn.mark { min-width: 132px; }
.task-btn:hover { border-color: var(--ink); }
.task-btn.is-done { background: var(--mint); border-color: var(--mint); color: #fff; }
.task-btn.stuck { color: var(--ink-2); font-weight: 500; }
.task-btn.stuck:hover { color: var(--coral); border-color: var(--coral); }
.task-opt { font-size: 12px; color: var(--ink-3); }
.step.is-done .step-num { background: var(--mint); }
.step.is-done .step-body > h3 { color: var(--ink-3); text-decoration: line-through; text-decoration-thickness: 1.5px; }

.progress-card { position: fixed; right: 20px; bottom: 20px; z-index: 60; transition: transform .12s linear; width: 280px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow-lg); padding: 14px 16px; font-size: 13.5px; }
.progress-card[hidden] { display: none; }
.pc-head { display: flex; justify-content: space-between; align-items: baseline; }
.pc-head b { font-size: 14px; }
.pc-head span { font-family: var(--mono); color: var(--ink-3); font-size: 12px; }
.pc-bar { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; margin: 10px 0; }
.pc-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--mint)); border-radius: 999px; transition: width .4s cubic-bezier(.2,.8,.2,1); }
.pc-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; color: var(--ink-3); }
.pc-foot span.link { cursor: pointer; color: var(--accent-ink); }
.pc-foot span.link:hover { text-decoration: underline; }
.step.flash .step-num { animation: flashnum 1.2s ease; }
@keyframes flashnum { 0%, 60% { box-shadow: 0 0 0 6px var(--accent-soft); background: var(--accent); } 100% { box-shadow: 0 0 0 0 transparent; } }
.pc-stuck { border: 0; background: var(--coral-soft); color: #9C2A15; border-radius: 999px; padding: 5px 11px; font-size: 12.5px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.progress-card.complete { border-color: var(--mint); background: linear-gradient(135deg, #fff, var(--mint-soft)); }
.progress-card.complete .pc-stuck { background: var(--mint-soft); color: #166534; }

.modal { position: fixed; inset: 0; z-index: 80; background: rgba(20,18,15,.45); backdrop-filter: blur(4px); display: grid; place-items: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal-card { position: relative; background: var(--surface); border-radius: 20px; padding: 28px; width: min(520px, 100%); box-shadow: var(--shadow-lg); max-height: calc(100vh - 40px); overflow: auto; }
.modal-card h3 { font-size: 24px; letter-spacing: -0.03em; margin: 4px 0 8px; }
.modal-card p { color: var(--ink-2); font-size: 15px; }
.modal-x { position: absolute; top: 12px; right: 14px; border: 0; background: transparent; font-size: 26px; line-height: 1; cursor: pointer; color: var(--ink-3); }
.stuck-label { display: block; font-weight: 600; font-size: 13.5px; margin: 16px 0 6px; }
.stuck-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.stuck-fine { font-size: 13px; color: var(--ink-3); margin-top: 14px; }
#fireworks { position: fixed; inset: 0; z-index: 70; pointer-events: none; width: 100%; height: 100%; }
#fireworks[hidden] { display: none; }

@media (max-width: 640px) {
  .progress-card { right: 10px; left: 10px; bottom: 10px; width: auto; padding: 10px 14px; }
  .pc-foot span { display: none; }
}

/* ---------- Mango fountain ---------- */
.mango-layer { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.mango-layer span { position: absolute; bottom: 0; line-height: 1; will-change: transform; filter: drop-shadow(0 10px 18px rgba(20,18,15,.15)); }