/* stanford-atx.tech — design system
   Palette and type per mood board. Amber appears on one element per viewport: the CTA. */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,600;9..144,700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --ink: #1B2430;
  --ink-2: #2B3540;
  --amber: #E07A1F;
  --amber-dark: #C4680F;
  --teal: #2F6F73;
  --teal-light: #E6F0F0;
  --bg: #F7F5F1;
  --surface: #FFFFFF;
  --muted: #5F6B7A;
  --line: #E3DED6;
  --moss: #3E8E5A;

  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', Menlo, monospace;

  --max: 1200px;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(27, 36, 48, 0.08);
  --shadow-hover: 0 6px 18px rgba(27, 36, 48, 0.10);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-family: var(--serif); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.01em; }
h1 { font-size: clamp(36px, 5vw, 60px); font-weight: 600; }
h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 600; }
h3 { font-size: 22px; font-weight: 600; }
h4 { font-size: 18px; font-weight: 600; }
p { margin: 0 0 16px; }
.lead { font-size: 20px; color: var(--ink-2); max-width: 62ch; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 14px; }

.container { width: min(var(--max), 100% - 48px); margin-inline: auto; }
section { padding: 112px 0; }
@media (max-width: 760px) { section { padding: 64px 0; } body { font-size: 16px; } }

.eyebrow {
  display: inline-block;
  font-size: 12px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--teal); margin-bottom: 14px;
}

/* Buttons — amber reserved for primary */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 24px; border-radius: 8px; font-weight: 600; font-size: 16px;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s;
  text-decoration: none !important; white-space: nowrap;
}
.btn-primary { background: var(--amber); color: #fff; }
.btn-primary:hover { background: var(--amber-dark); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.link-arrow { font-weight: 600; }
.link-arrow::after { content: " →"; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50; height: 64px;
  background: rgba(247, 245, 241, 0.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.wordmark { font-family: var(--serif); font-weight: 700; font-size: 20px; line-height: 1.05; color: var(--ink); text-decoration: none !important; display: inline-flex; flex-direction: column; }
.wordmark span { color: var(--teal); }
.wordmark small { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: #66707C; font-weight: 500; margin-top: 3px; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--ink-2); font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--ink); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; color: var(--ink); }
@media (max-width: 900px) {
  .nav { position: fixed; inset: 64px 0 auto 0; background: var(--bg); flex-direction: column; align-items: flex-start;
         padding: 20px 24px 28px; border-bottom: 1px solid var(--line); display: none; }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .header-cta { padding: 10px 14px; font-size: 14px; }
}

/* Hero */
.hero { padding: 96px 0 56px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.hero h1 { max-width: 16ch; }
.hero .lead { margin-bottom: 32px; }
.hero-actions { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.hero-visual { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero { padding-top: 56px; } }

/* Stats strip */
.stats { background: var(--ink); color: #fff; padding: 36px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; text-align: center; }
.stat-num { font-family: var(--serif); font-size: 38px; font-weight: 600; line-height: 1; color: #fff; }
.stat-label { font-size: 14px; color: #C9D1DB; margin-top: 8px; }
@media (max-width: 900px) { .stats-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }

/* About */
.about-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 56px; align-items: start; }
.portrait { aspect-ratio: 4/5; width: 100%; object-fit: cover; object-position: center 20%; border-radius: var(--radius);
            border: 1px solid var(--line); display: block; background: var(--teal-light); }
.proof { display: grid; gap: 20px; margin: 24px 0; }
.proof-item { display: grid; grid-template-columns: 44px 1fr; gap: 16px; }
.proof-icon { width: 44px; height: 44px; border-radius: 10px; background: var(--teal-light); color: var(--teal); display: grid; place-items: center; }
.proof-item h4 { margin-bottom: 6px; }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; } .portrait { max-width: 360px; } }

/* Cards / tiles */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
@media (max-width: 900px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.card .icon { width: 44px; height: 44px; border-radius: 10px; background: var(--teal-light); color: var(--teal); display: grid; place-items: center; margin-bottom: 18px; }
.card h3 { font-size: 20px; }
.card .typical { font-size: 14px; color: var(--muted); margin: 14px 0 0; padding-top: 14px; border-top: 1px solid var(--line); }

/* Tiers */
.tiers { margin-top: 56px; }
.tier { position: relative; }
.tier h3 { font-size: 22px; color: var(--teal); }
.tier .best { font-size: 14px; color: var(--muted); font-style: italic; margin-top: 16px; }
.tier.featured { border-color: var(--ink); }

/* Work */
.work-item { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 48px 0; border-bottom: 1px solid var(--line); }
.work-item:last-of-type { border-bottom: 0; }
.work-item.reverse .work-shot { order: 2; }
.work-shot { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow); }
.work-shot svg { width: 100%; height: auto; border-radius: 6px; }
.work-meta { display: grid; gap: 12px; margin: 18px 0; }
.work-meta div { display: grid; grid-template-columns: 90px 1fr; gap: 12px; font-size: 15px; }
.work-meta dt { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--teal); padding-top: 3px; }
.work-meta dd { margin: 0; color: var(--ink-2); }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-family: var(--mono); font-size: 12px; padding: 4px 10px; border-radius: 999px; background: var(--bg); border: 1px solid var(--line); color: var(--ink-2); }
.more-work { margin-top: 48px; }
.more-work .card h4 { margin-bottom: 8px; }
@media (max-width: 900px) { .work-item { grid-template-columns: 1fr; gap: 24px; } .work-item.reverse .work-shot { order: 0; } }

/* Training */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 40px 0; }
.step .num { font-family: var(--serif); font-size: 40px; color: var(--amber); line-height: 1; margin-bottom: 12px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }

/* Integrations */
.live { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 32px 0; }
.live-item { display: grid; grid-template-columns: 14px 1fr; gap: 14px; align-items: start; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--moss); margin-top: 7px; box-shadow: 0 0 0 4px rgba(62,142,90,.15); }
.live-item strong { display: block; margin-bottom: 4px; }
.live-item p { margin: 0; font-size: 15px; color: var(--ink-2); }
.tech-row { display: flex; flex-wrap: wrap; gap: 10px; }
@media (max-width: 760px) { .live { grid-template-columns: 1fr; } }

/* Notes */
.note-card .meta { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.note-card h3 { font-size: 20px; }
.note-card h3 a { color: var(--ink); }

/* Testimonials */
.quote { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; font-size: 17px; }
.quote blockquote { margin: 0 0 16px; font-family: var(--serif); font-size: 19px; line-height: 1.45; color: var(--ink); }
.quote cite { font-style: normal; font-size: 14px; color: var(--muted); }
.quote cite strong { color: var(--ink); display: block; }

/* Contact */
.contact { background: var(--surface); border-top: 1px solid var(--line); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: start; }
.contact-options { display: grid; gap: 14px; margin-top: 24px; }
.contact-option { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); }
.contact-option .icon { width: 36px; height: 36px; border-radius: 8px; background: var(--teal-light); color: var(--teal); display: grid; place-items: center; flex: none; }
.contact-option a { color: var(--ink); font-weight: 600; }
form.intake { display: grid; gap: 16px; background: var(--bg); padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); }
.field { display: grid; gap: 6px; }
.field label { font-size: 14px; font-weight: 600; }
.field input, .field select, .field textarea {
  font: inherit; font-size: 16px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--teal); outline-offset: 1px; border-color: var(--teal); }
.field textarea { min-height: 110px; resize: vertical; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { font-size: 13px; color: var(--muted); margin: 0; }
.hp { position: absolute; left: -9999px; }
.form-status { display: none; padding: 14px 16px; border-radius: 8px; font-size: 15px; }
.form-status.ok { display: block; background: #E8F3EC; color: #22603A; border: 1px solid #BFE0CB; }
.form-status.err { display: block; background: #FBEAEA; color: #8A2A2A; border: 1px solid #F0C4C4; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } .row-2 { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { background: var(--ink); color: #C9D1DB; padding: 48px 0 32px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.site-footer a { color: #fff; }
.site-footer .wordmark { color: #fff; }
.site-footer .wordmark span { color: #8FC1C4; }
.site-footer .wordmark small { color: #98A4B1; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; } }

/* Reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* Article pages */
.article { max-width: 72ch; margin: 0 auto; padding: 72px 0 96px; }
.article h1 { font-size: clamp(32px, 4vw, 46px); }
.article .meta { color: var(--muted); font-size: 14px; margin-bottom: 32px; }
.article h2 { font-size: 26px; margin-top: 40px; page-break-before: auto; }
.article p { font-size: 18px; }
.article blockquote { border-left: 3px solid var(--teal); padding: 8px 20px; margin: 24px 0; background: var(--surface); color: var(--ink-2); border-radius: 0 8px 8px 0; }
.cta-box { background: var(--ink); color: #fff; border-radius: var(--radius); padding: 36px; margin-top: 48px; display: flex; gap: 24px; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.cta-box h3 { color: #fff; margin: 0; }

/* Training module */
.module { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.module-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; border-bottom: 1px solid var(--line); background: var(--bg); }
.module-head .title { font-weight: 600; }
.progress { height: 6px; background: var(--line); }
.progress span { display: block; height: 100%; background: var(--teal); transition: width .3s; }
.module-body { padding: 32px; min-height: 360px; }
.module-body h3 { margin-top: 0; }
.module-foot { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; border-top: 1px solid var(--line); }
.screen { display: none; }
.screen.active { display: block; }
.choice { display: block; width: 100%; text-align: left; padding: 14px 16px; margin: 8px 0; border: 1px solid var(--line); border-radius: 8px; background: #fff; font: inherit; cursor: pointer; }
.choice:hover { border-color: var(--teal); }
.choice.correct { border-color: var(--moss); background: #E8F3EC; }
.choice.wrong { border-color: #C94B4B; background: #FBEAEA; }
.feedback { margin-top: 12px; padding: 12px 14px; border-radius: 8px; font-size: 15px; display: none; }
.feedback.show { display: block; background: var(--teal-light); color: var(--ink); }
.objective { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: 8px; background: var(--bg); border: 1px solid var(--line); margin: 8px 0; }
.objective .check { color: var(--moss); font-weight: 700; }

/* PB&J module */
.pbj-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 16px; }
.pbj-item { display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; font-size: 14px; }
.pbj-item .pbj-ico { font-size: 22px; line-height: 1; margin-bottom: 6px; }
.pbj-item .muted { font-size: 13px; }
.pbj-steps { margin: 12px 0 0; padding-left: 0; list-style: none; counter-reset: step; }
.pbj-steps li { counter-increment: step; display: flex; gap: 12px; align-items: flex-start; padding: 10px 14px; border-radius: 8px; margin: 6px 0; background: var(--bg); border: 1px solid var(--line); font-size: 15px; }
.pbj-steps li::before { content: counter(step); font-family: var(--mono); font-weight: 600; font-size: 12px; color: var(--teal); min-width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid var(--teal); display: inline-flex; align-items: center; justify-content: center; margin-top: 2px; }
.pbj-steps li.hi { border-color: var(--amber); background: #FDF3E8; }
.pbj-steps li.hi::before { background: var(--amber); border-color: var(--amber); color: #fff; }
.order-list { list-style: none; margin: 12px 0 0; padding: 0; }
.order-list li { display: flex; align-items: center; gap: 12px; padding: 12px 14px; margin: 6px 0; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; font-size: 15px; cursor: grab; user-select: none; }
.order-list li:active { cursor: grabbing; }
.order-list li.dragging { opacity: .45; }
.order-list li.correct { border-color: var(--moss); background: #E8F3EC; }
.order-list li.wrong { border-color: #C94B4B; background: #FBEAEA; }
.order-list .grip { color: #B5B0A6; letter-spacing: -2px; font-size: 14px; }
.order-list .txt { flex: 1; }
.order-list .arrows { display: flex; gap: 4px; }
.order-list .arrows button { width: 28px; height: 28px; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); cursor: pointer; font-size: 13px; color: var(--ink-2); }
.order-list .arrows button:hover { border-color: var(--teal); }
.order-list .arrows button:disabled { opacity: .4; cursor: default; }
@media (max-width: 640px) { .pbj-grid { grid-template-columns: repeat(2, 1fr); } }