/* learnaigently.com: the public coming-soon site. Same tokens as the course (assets/css/course.css). */
:root {
  --paper: #f5f7f4; --surface: #ffffff; --surface-2: #ecf0eb; --ink: #1b2a31; --ink-soft: #4a5b62; --line: #d3dbd5;
  --accent: #1d6a59; --accent-ink: #ffffff; --accent-soft: #dcede5; --highlight: #f4c64a; --highlight-soft: #fbe9b4;
  --ink-on-hl: #1b2a31; --warn: #a83a2c; --warn-soft: #f9e4df;
  --shadow: 0 1px 2px rgb(27 42 49 / 6%), 0 10px 30px rgb(27 42 49 / 8%);
  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, sans-serif;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px)); --gutter-r: max(16px, env(safe-area-inset-right, 0px));
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #10171a; --surface: #172126; --surface-2: #1d2a2f; --ink: #e5ece8; --ink-soft: #a6b5b0; --line: #2c3c41;
    --accent: #6cc4a8; --accent-ink: #0b1a15; --accent-soft: #1b3832; --highlight: #e9bb3c; --highlight-soft: #463a17;
    --warn: #f19181; --warn-soft: #3b201c; --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 10px 30px rgb(0 0 0 / 30%);
    color-scheme: dark;
  }
}
html { font-size: 112.5%; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 1rem; }
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-body); line-height: 1.6; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; letter-spacing: -0.01em; margin: 0; text-wrap: balance; }
p { margin: 0; }
a { color: var(--accent); text-underline-offset: 0.18em; }
img { max-width: 100%; height: auto; display: block; }
:focus-visible { outline: 3px solid var(--highlight); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: 1120px; margin-inline: auto; padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.eyebrow { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.lede { font-size: 1.15rem; color: var(--ink-soft); }
.hl { background: linear-gradient(transparent 58%, var(--highlight-soft) 58%, var(--highlight-soft) 92%, transparent 92%); }
[hidden] { display: none !important; }
.vh { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* header */
.top { padding-block: 1rem; }
.top .wrap { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--ink); font: 800 1.2rem/1 var(--font-display); }
.brand svg { width: 36px; height: 36px; }
.top .cta-link { margin-left: auto; font-weight: 700; text-decoration: none; padding: 0.45rem 0.9rem; border-radius: 999px; background: var(--highlight-soft); color: var(--ink); font-size: 0.92rem; }

/* hero */
.hero { padding-block: 2.5rem 3.5rem; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 3rem; align-items: start; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.7rem); font-weight: 800; margin-block: 0.6rem 1rem; }
.hero .lede { margin-bottom: 1.4rem; max-width: 34rem; }
.opening { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 0.4rem 0.9rem; font-size: 0.95rem; }
.opening::before { content: ""; width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--highlight); }
.facts { list-style: none; padding: 0; margin: 1.6rem 0 0; display: grid; gap: 0.6rem; max-width: 34rem; }
.facts li { display: flex; gap: 0.6rem; }
.facts li::before { content: ""; flex: none; width: 0.75rem; height: 0.42rem; margin-top: 0.45rem; border-left: 3px solid var(--accent); border-bottom: 3px solid var(--accent); transform: rotate(-45deg); }
@media (max-width: 880px) { .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 2rem; } }

/* signup card */
.signup { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 1.5rem; box-shadow: var(--shadow); display: grid; gap: 1rem; }
.signup h2 { font-size: 1.45rem; }
.signup .gift-tag { display: inline-block; font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; background: var(--highlight); color: var(--ink-on-hl); border-radius: 999px; padding: 0.15rem 0.6rem; }
.signup form { display: grid; gap: 0.9rem; }
.field { display: grid; gap: 0.3rem; font-weight: 700; font-size: 0.95rem; }
.field small { font-weight: 400; color: var(--ink-soft); }
.field input[type=email], .field input[type=text] { font: 400 1rem/1.4 var(--font-body); color: var(--ink); background: var(--paper); border: 2px solid var(--line); border-radius: 10px; padding: 0.65rem 0.8rem; width: 100%; }
.field input:focus { outline: 3px solid var(--highlight); outline-offset: 0; border-color: var(--accent); }
fieldset.who { border: 0; margin: 0; padding: 0; }
fieldset.who legend { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.4rem; }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip { position: relative; }
.chip input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.chip span { display: inline-block; padding: 0.45rem 0.85rem; border: 2px solid var(--line); border-radius: 999px; background: var(--paper); font-size: 0.92rem; }
.chip input:checked + span { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.chip input:focus-visible + span { outline: 3px solid var(--highlight); outline-offset: 2px; }
.btn { display: inline-flex; justify-content: center; align-items: center; gap: 0.5rem; font: 700 1.05rem/1.2 var(--font-body); background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 999px; padding: 0.9rem 1.4rem; cursor: pointer; text-decoration: none; }
.btn:hover { filter: brightness(1.06); }
.btn[disabled] { opacity: 0.6; cursor: wait; }
.consent { font-size: 0.82rem; color: var(--ink-soft); }
.status { font-weight: 700; color: var(--warn); }
.done { display: grid; gap: 0.8rem; }
.done h2 { font-size: 1.5rem; }

/* sections */
.band { padding-block: 3.5rem; }
.band.alt { background: var(--surface); border-block: 1px solid var(--line); }
.band h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 800; }
.split { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 3rem; align-items: center; }
.split img { border-radius: 10px; border: 1px solid var(--line); box-shadow: var(--shadow); transform: rotate(-1.5deg); background: #fff; }
.split ul { padding-left: 1.2rem; margin: 1rem 0 1.4rem; display: grid; gap: 0.4rem; }
@media (max-width: 800px) { .split { grid-template-columns: minmax(0, 1fr); gap: 2rem; } .split img { max-width: min(100%, 22rem); margin-inline: auto; } }

.why { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); gap: 1.25rem; margin-top: 1.5rem; }
.why > div { background: var(--warn-soft); border-radius: 14px; padding: 1.2rem 1.3rem; }
.why .num { font: 800 2rem/1 var(--font-display); color: var(--warn); }
.why p + p { margin-top: 0.5rem; }
.src { font-size: 0.8rem; color: var(--ink-soft); }

.parts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem; margin-top: 1.5rem; }
@media (max-width: 1000px) { .parts { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .parts { grid-template-columns: minmax(0, 1fr); } }
.part { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 1.2rem 1.3rem; }
.band:not(.alt) .part { background: var(--surface); }
.part h3 { font-size: 1.15rem; margin: 0.25rem 0 0.6rem; }
.part ol { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.3rem; font-size: 0.95rem; }
.part ol li::marker { color: var(--ink-soft); font-weight: 700; }
.included { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-top: 1.5rem; color: var(--ink-soft); }
.included strong { color: var(--ink); }

.gift { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 1.5rem; align-items: center; background: var(--highlight-soft); border-radius: 18px; padding: 1.8rem; }
.gift svg { width: 84px; height: 84px; }
@media (max-width: 600px) { .gift { grid-template-columns: minmax(0, 1fr); } }

.faq { max-width: 46rem; margin-top: 1.2rem; }
.faq details { border-bottom: 1px solid var(--line); padding-block: 0.9rem; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 1.05rem; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::after { content: "+"; font: 700 1.3rem/1 var(--font-display); color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 0.5rem; color: var(--ink-soft); }

.foot { padding-block: 2rem 2.5rem; font-size: 0.88rem; color: var(--ink-soft); }
.foot .wrap { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between; }

/* plain pages (privacy, thanks) */
.page { padding-block: 2rem 4rem; max-width: 44rem; }
.page h1 { font-size: clamp(2rem, 4.5vw, 2.8rem); font-weight: 800; margin: 0.5rem 0 1rem; }
.page h2 { font-size: 1.3rem; margin: 2rem 0 0.5rem; }
.page p + p, .page ul { margin-top: 0.7rem; }
.page ul { padding-left: 1.3rem; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .split img { transform: none; } }