@font-face {
  font-family: "Geist";
  src: url("../fonts/geist-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/instrument-serif-italic-latin.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

:root {
  --bg: #080F15;
  --text: #ECEAE5;
  --muted: #8B949C;
  --line: rgba(236, 234, 229, .10);
  --accent: #00BDF1;
  --wrap: 1160px;
  --sans: "Geist", system-ui, -apple-system, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 400; letter-spacing: -.035em; line-height: 1.05; }
h2 { font-size: clamp(2rem, 4.4vw, 3.4rem); }
h3 { font-size: clamp(1.35rem, 2.4vw, 1.9rem); letter-spacing: -.025em; }
em { font-family: var(--serif); font-style: italic; letter-spacing: -.01em; color: var(--accent); }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--text); color: var(--bg); padding: 8px 14px; border-radius: 6px; z-index: 100; }
.skip:focus { left: 16px; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 42ch; margin: 24px 0 40px; }
.label { font-size: .9rem; letter-spacing: 0; color: var(--muted); margin-bottom: 40px; }

/* Button */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--text); color: var(--bg); text-decoration: none; border: 0; cursor: pointer;
  font: 500 1rem/1 var(--sans); padding: 18px 28px; border-radius: 999px; transition: background .25s;
}
.btn span { transition: transform .25s; }
.btn:hover { background: var(--accent); }
.btn:hover span { transform: translateX(4px); }
.btn-sm { padding: 12px 18px; font-size: .92rem; }
.btn-block { width: 100%; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(8, 15, 21, .8); backdrop-filter: blur(12px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 500; letter-spacing: -.02em; }
.nav { display: flex; align-items: center; gap: 32px; }
.nav a { text-decoration: none; font-size: .95rem; color: var(--muted); transition: color .2s; }
.nav a:hover, .nav .nav-cta { color: var(--text); }
.nav .nav-cta { border-bottom: 1px solid var(--accent); padding-bottom: 2px; }

/* Hero */
.hero { padding: clamp(80px, 16vh, 180px) 0 clamp(80px, 14vh, 160px); }
.hero h1 { font-size: clamp(2.8rem, 7vw, 6.4rem); max-width: 13ch; }
#session .btn { margin-top: 40px; }
.direct { margin-top: 40px; }

.idea { margin-top: 64px; display: flex; flex-wrap: wrap; align-items: center; gap: 24px 36px; }
.idea-line { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 12px; font-size: clamp(1.2rem, 2.2vw, 1.6rem); letter-spacing: -.02em; }
.idea-line select, .idea-line input {
  font: inherit; letter-spacing: inherit; color: var(--accent);
  background: transparent; border: 0; border-bottom: 1px solid var(--muted); border-radius: 0;
  padding: 0 2px 2px; max-width: 100%; transition: border-color .2s;
}
.idea-line select { cursor: pointer; appearance: none; padding-right: 22px; background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%238B949C' stroke-width='1.5'/%3E%3C/svg%3E") right 4px center no-repeat; }
.idea-line option { color: #000; }
.idea-line input::placeholder { color: rgba(139, 148, 156, .6); }
.idea-line select:focus, .idea-line input:focus { outline: none; border-color: var(--accent); }
.assure { margin-top: 36px; font-size: .9rem; color: var(--muted); }

/* Sections */
.section { padding: clamp(80px, 12vw, 140px) 0; border-top: 1px solid var(--line); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.split > .label { margin: 0; }

/* Services */
.index { list-style: none; padding: 0; margin: 0; }
.index li + li { border-top: 1px solid var(--line); }
.index a { display: grid; grid-template-columns: 1fr 1fr 32px; align-items: center; gap: 32px; padding: 32px 0; text-decoration: none; }
.index p { color: var(--muted); }
.index h3, .go { transition: color .25s, transform .25s; }
.index a:hover h3 { color: var(--accent); }
.go { justify-self: end; color: var(--muted); font-size: 1.3rem; }
.index a:hover .go { color: var(--accent); transform: translateX(6px); }

/* Session list */
.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: 22px 0; font-size: 1.2rem; letter-spacing: -.015em; }
.list li + li { border-top: 1px solid var(--line); }

/* FAQ */
.faq details + details { border-top: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative; font-size: 1.2rem; letter-spacing: -.015em; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before, .faq summary::after { content: ""; position: absolute; right: 4px; top: 50%; width: 14px; height: 1px; background: var(--muted); transition: transform .3s; }
.faq summary::after { transform: rotate(90deg); }
.faq details[open] summary::after { transform: rotate(0); }
.faq details p { color: var(--muted); padding: 0 40px 24px 0; }

/* Contact */
.huge { font-size: clamp(3.6rem, 10vw, 8rem); letter-spacing: -.05em; line-height: .9; }
.direct { font-size: 1.2rem; }
.direct a { text-decoration: none; }
.direct .addr { color: var(--muted); font-size: .95rem; }
.direct a:hover { color: var(--accent); }
.field { display: grid; gap: 6px; margin: 0 0 28px; border: 0; padding: 0; }
.field > label, legend { font-size: .85rem; color: var(--muted); padding: 0; }
.field input, .field textarea {
  width: 100%; font: inherit; font-size: 1.1rem; color: var(--text); background: transparent;
  border: 0; border-bottom: 1px solid var(--line); border-radius: 0; padding: 8px 0 10px; resize: vertical; transition: border-color .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field.invalid input, .field.invalid textarea { border-color: #F06A5B; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips legend { margin-bottom: 10px; width: 100%; }
.chips label { cursor: pointer; }
.chips input { position: absolute; opacity: 0; }
.chips span { display: inline-block; padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px; font-size: .92rem; color: var(--muted); transition: all .2s; }
.chips input:checked + span { border-color: var(--accent); color: var(--text); }
.chips input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.hp { position: absolute; left: -9999px; }
.form-note { margin-top: 14px; text-align: center; font-size: .85rem; color: var(--muted); }
.form-status { margin-top: 8px; min-height: 1.4em; text-align: center; color: var(--accent); font-size: .95rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; font-size: .9rem; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-inner nav { display: flex; gap: 24px; }
.footer-inner a { text-decoration: none; }
.footer-inner a:hover { color: var(--text); }

.mobile-bar { display: none; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .index a { grid-template-columns: 1fr 28px; gap: 8px 16px; }
  .index p { grid-row: 2; }
  .go { grid-row: 1 / span 2; }
}
@media (max-width: 720px) {
  .nav a:not(.nav-cta) { display: none; }
  .idea, .idea .btn { width: 100%; }
  .idea-line input { flex: 1; min-width: 8ch; }
  .mobile-bar {
    display: flex; gap: 10px; align-items: center; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 60;
    padding: 8px; border-radius: 999px; background: rgba(20, 28, 36, .92); backdrop-filter: blur(10px);
    border: 1px solid var(--line); transform: translateY(140%); transition: transform .4s;
  }
  .mobile-bar.show { transform: none; }
  .mobile-bar > a:first-child { padding: 12px 20px; text-decoration: none; }
  .mobile-bar .btn { flex: 1; }
  body { padding-bottom: 80px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}