:root {
  --bg: #f6f4ee;
  --bg-alt: #ece8dd;
  --surface: #ffffff;
  --ink: #15171a;
  --ink-soft: #4a4f57;
  --line: #d9d4c7;
  --accent: #2f5bff;
  --accent-ink: #ffffff;
  --signal: #c6f432;
  --dark: #111317;
  --dark-ink: #f3f1ea;
  --radius: 14px;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101215;
    --bg-alt: #16191d;
    --surface: #1b1f24;
    --ink: #eeece6;
    --ink-soft: #a6abb3;
    --line: #2b3037;
    --accent: #6f8cff;
    --dark: #080a0c;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.12; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.6rem, 6vw, 4.6rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }
em { font-style: italic; color: var(--accent); }

.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; }

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.eyebrow--light { color: var(--signal); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  border: 0;
  background: var(--accent);
  color: var(--accent-ink);
  font: 600 1rem var(--sans);
  text-decoration: none;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px -8px var(--accent); }
.btn--small { padding: 9px 18px; font-size: 0.92rem; }
.btn--light { background: var(--signal); color: var(--dark); }
.btn--light:hover { box-shadow: 0 8px 20px -8px var(--signal); }
.link-arrow { font-weight: 600; text-decoration: none; }
.link-arrow::after { content: " →"; transition: margin .15s; }
.link-arrow:hover::after { margin-left: 4px; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav.is-scrolled { border-color: var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav__links { display: flex; align-items: center; gap: 28px; }
.nav__links a:not(.btn) { text-decoration: none; font-weight: 500; color: var(--ink-soft); }
.nav__links a:not(.btn):hover { color: var(--ink); }
.nav__toggle { display: none; }

.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 1.2rem; text-decoration: none; letter-spacing: -0.02em; }
.logo__mark {
  width: 22px; height: 22px; border-radius: 6px;
  background: var(--accent);
  position: relative;
}
.logo__mark::after {
  content: ""; position: absolute; right: -3px; bottom: -3px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--signal); border: 2px solid var(--bg);
}
.logo__dot { color: var(--accent); }

/* Hero */
.hero { padding: clamp(56px, 10vw, 120px) 0 clamp(48px, 8vw, 96px); }
.hero__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: center; }
.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 34ch; margin-top: 24px; }
.hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin-top: 36px; }

.hero__panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: 0 30px 60px -40px rgba(0,0,0,.35);
}
.flow { display: grid; gap: 18px; }
.flow__row { display: flex; align-items: center; }
.flow__line {
  flex: 1; height: 2px; min-width: 16px;
  background: repeating-linear-gradient(90deg, var(--line) 0 6px, transparent 6px 12px);
  background-size: 24px 2px;
  animation: dash 1.2s linear infinite;
}
@keyframes dash { to { background-position: 24px 0; } }
.chip {
  padding: 8px 12px;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
}
.chip--ai { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.hero__panel-note { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 0.95rem; }

/* Audience */
.audience { border-block: 1px solid var(--line); }
.audience__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.audience article { padding: 36px 32px; }
.audience article + article { border-left: 1px solid var(--line); }
.audience h3 { margin-bottom: 10px; }
.audience p { color: var(--ink-soft); }

/* Sections */
.section { padding: clamp(72px, 10vw, 120px) 0; }
.section--alt { background: var(--bg-alt); }
.section__head { max-width: 640px; margin-bottom: 56px; }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card__num { display: block; font-family: var(--serif); font-size: 1.1rem; color: var(--accent); margin-bottom: 28px; }
.card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.card p { color: var(--ink-soft); }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: step; }
.steps li { counter-increment: step; border-top: 2px solid var(--ink); padding-top: 20px; }
.steps li::before { content: "0" counter(step); display: block; font-family: var(--serif); font-size: 2.4rem; color: var(--accent); margin-bottom: 12px; line-height: 1; }
.steps h3 { margin-bottom: 8px; }
.steps p { color: var(--ink-soft); }

.examples { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.example { padding: 28px 24px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); }
.example__tag { font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin-bottom: 18px; }
.example h3 { margin-bottom: 10px; }
.example p:last-child { color: var(--ink-soft); font-size: 0.97rem; }

/* Principles */
.principles { background: var(--dark); color: var(--dark-ink); padding: clamp(64px, 9vw, 110px) 0; }
.principles__grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center; }
.principles__quote { font-family: var(--serif); font-size: clamp(1.7rem, 3.2vw, 2.5rem); line-height: 1.25; letter-spacing: -0.01em; }
.principles__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.principles__list li { padding-left: 28px; position: relative; color: #b9bdc4; }
.principles__list li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 10px; height: 10px; border-radius: 50%; background: var(--signal); }
.principles__list strong { color: var(--dark-ink); font-weight: 600; }

.hero__cred { margin-top: 32px; padding-left: 14px; border-left: 3px solid var(--signal); color: var(--ink-soft); font-size: 0.95rem; max-width: 46ch; }

/* Founder */
.founder { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.founder__intro h2 { margin-bottom: 24px; }
.founder__intro p { color: var(--ink-soft); margin-bottom: 16px; max-width: 52ch; }
.founder__intro strong { color: var(--ink); font-weight: 600; }
.founder__intro .link-arrow { display: inline-block; margin-top: 8px; color: var(--accent); }
.founder__detail { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 32px; }
.founder__detail h3 { margin-bottom: 16px; }
.founder__detail h3 + ul { margin-bottom: 28px; }
.founder__detail ul:last-child { margin-bottom: 0; }
.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.ticks li { position: relative; padding-left: 28px; color: var(--ink-soft); }
.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 600; }
.badges { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.badges li { padding: 6px 12px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); font-size: 0.85rem; font-weight: 500; }

/* FAQ */
.faq { display: grid; grid-template-columns: 1fr 1.6fr; gap: 64px; }
.faq .section__head { margin-bottom: 0; }
.faq__list details { border-bottom: 1px solid var(--line); }
.faq__list details:first-child { border-top: 1px solid var(--line); }
.faq__list summary {
  list-style: none; cursor: pointer;
  padding: 22px 40px 22px 0; position: relative;
  font-weight: 600; font-size: 1.08rem;
}
.faq__list summary::-webkit-details-marker { display: none; }
.faq__list summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-size: 1.5rem; font-weight: 400; color: var(--accent); transition: transform .2s;
}
.faq__list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq__list details p { padding: 0 40px 24px 0; color: var(--ink-soft); }

/* Contact */
.contact { background: var(--accent); color: #fff; padding: clamp(72px, 10vw, 120px) 0; }
.contact__grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; }
.contact h2 { margin-bottom: 20px; }
.contact p { color: rgba(255,255,255,.85); max-width: 42ch; }
.contact__email { margin-top: 24px; }
.contact__email a { color: #fff; font-weight: 600; }
.form {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px; padding: 28px;
}
.form label { display: grid; gap: 6px; font-size: 0.88rem; font-weight: 500; }
.form__full { grid-column: 1 / -1; }
.form input, .form select, .form textarea {
  width: 100%;
  font: inherit; font-size: 1rem;
  color: #fff;
  background: rgba(0,0,0,.18);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 10px;
  padding: 12px 14px;
}
.form select option { color: #111; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--signal); outline-offset: 1px; border-color: transparent; }
.form textarea { resize: vertical; }
.form [aria-invalid="true"] { border-color: #ffb4b4; }
.form__status { min-height: 1.4em; font-size: 0.95rem; }

/* Footer */
.footer { padding: 40px 0; border-top: 1px solid var(--line); }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; }
.footer__inner p { color: var(--ink-soft); font-size: 0.92rem; }
.footer__link { font-weight: 600; font-size: 0.92rem; color: var(--accent); text-decoration: none; }
.footer__copy { margin-left: auto; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Responsive */
@media (max-width: 1000px) {
  .examples { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .hero__grid, .principles__grid, .faq, .contact__grid, .founder { grid-template-columns: 1fr; gap: 40px; }
  .founder__detail { padding: 24px 20px; }
  .audience__grid { grid-template-columns: 1fr; }
  .audience article { padding: 28px 0; }
  .audience article + article { border-left: 0; border-top: 1px solid var(--line); }

  .nav__toggle {
    display: grid; gap: 6px; place-content: center;
    width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer;
  }
  .nav__toggle span { display: block; width: 22px; height: 2px; background: var(--ink); transition: transform .2s; }
  .nav__toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .nav__links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px 16px 20px;
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav__links .btn { margin-top: 16px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .cards, .examples, .steps { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; padding: 20px; }
  .hero__panel { padding: 22px 16px; }
  .chip { padding: 6px 9px; font-size: 0.78rem; }
  .footer__copy { margin-left: 0; }
}