:root {
  --bg: #F3F7F4; --surface: #FFFFFF; --ink: #14261C; --muted: #4A5A50;
  --brand: #1F6B3A; --link: #1F6B3A; --btn: #1F6B3A; --btn-text: #FFFFFF;
  --accent: #F2A93B; --line: #D3DFD6; --tint: #E3EEE6; --deep: #14261C; --deep-text: #E8F1EA;
  --head: "Bricolage Grotesque", "Trebuchet MS", "Segoe UI", sans-serif;
  --body: "Figtree", "Segoe UI", Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0E1A13; --surface: #16251C; --ink: #E8F1EA; --muted: #A9BBAE;
    --brand: #5FBF80; --link: #7FD39B; --btn: #2E8B4A; --btn-text: #FFFFFF;
    --line: #27382D; --tint: #1B2D22; --deep: #0A130E; --deep-text: #E8F1EA;
  }
}
:root[data-theme="dark"] {
  --bg: #0E1A13; --surface: #16251C; --ink: #E8F1EA; --muted: #A9BBAE;
  --brand: #5FBF80; --link: #7FD39B; --btn: #2E8B4A; --btn-text: #FFFFFF;
  --line: #27382D; --tint: #1B2D22; --deep: #0A130E; --deep-text: #E8F1EA;
}
html { scroll-padding-top: calc(env(safe-area-inset-top, 0px) + 72px); scroll-behavior: smooth; }
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: 1.0625rem; line-height: 1.6; -webkit-font-smoothing: antialiased; }
h1, h2, h3 { font-family: var(--head); line-height: 1.08; margin: 0; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 6.4vw, 4.6rem); font-weight: 800; }
h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: var(--link); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }
section { padding: 4.5rem 0; }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 38rem; }
.btn { display: inline-block; background: var(--btn); color: var(--btn-text); font: 600 1rem var(--body); padding: 0.85rem 1.4rem; border-radius: 999px; border: 0; text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.1); }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--line); }
.btn.ghost:hover { box-shadow: inset 0 0 0 2px var(--brand); filter: none; }

/* header */
header.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 1rem; }
.logo { display: flex; align-items: center; gap: 0.5rem; font: 800 1.45rem var(--head); color: var(--ink); text-decoration: none; letter-spacing: -0.03em; }
.logo svg { width: 26px; height: 26px; }
nav.links { display: flex; gap: 1.6rem; }
nav.links a { color: var(--ink); text-decoration: none; font-weight: 500; font-size: 0.98rem; }
nav.links a:hover { color: var(--brand); }
@media (max-width: 760px) { nav.links { display: none; } }

/* hero */
.hero { padding: 3.5rem 0 4rem; }
.hero .grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3rem; align-items: center; }
.hero h1 { max-width: 12ch; }
.hero .lead { margin-top: 1.3rem; }
.hero .cta { margin-top: 1.8rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }
@media (max-width: 860px) { .hero .grid { grid-template-columns: 1fr; gap: 2.2rem; } .hero h1 { max-width: 14ch; } }

.session { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: 1.5rem; }
.session h2 { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em; }
.session .sub { color: var(--muted); font-size: 0.95rem; margin-top: 0.2rem; }
.session label { display: flex; justify-content: space-between; font-weight: 600; margin-top: 1.3rem; font-size: 0.98rem; }
.session input[type=range] { width: 100%; margin: 0.6rem 0 0; accent-color: var(--brand); }
.bar { position: relative; height: 18px; background: var(--tint); border-radius: 999px; overflow: hidden; margin-top: 1.1rem; }
.bar i { position: absolute; left: 0; top: 0; bottom: 0; background: var(--brand); border-radius: 999px; }
.bar i.fill { background: linear-gradient(90deg, var(--brand), var(--accent)); }
.bar .start { background: var(--brand); opacity: 0.45; }
.mins { font: 800 3.4rem/1 var(--head); letter-spacing: -0.03em; margin-top: 1.1rem; }
.mins small { font: 600 1.1rem var(--body); color: var(--muted); letter-spacing: 0; margin-left: 0.3rem; }
.session .idea { margin-top: 0.5rem; font-size: 1.05rem; min-height: 3.2em; }
.session .note { margin-top: 0.8rem; font-size: 0.85rem; color: var(--muted); }

/* proof */
.proof { padding: 0; }
.proof .wrap { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.proof div.f { padding: 1.5rem 1rem 1.5rem 0; }
.proof div.f + div.f { padding-left: 1.4rem; border-left: 1px solid var(--line); }
.proof b { display: block; font: 800 2.3rem/1 var(--head); letter-spacing: -0.03em; }
.proof span { display: block; color: var(--muted); font-size: 0.95rem; margin-top: 0.35rem; }
@media (max-width: 760px) { .proof .wrap { grid-template-columns: 1fr 1fr; } .proof .wrap div.f:nth-child(3) { border-left: 0; padding-left: 0; } .proof .wrap div.f:nth-child(n+3) { border-top: 1px solid var(--line); } }

/* problem */
.problem .cols { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 2rem; }
.problem p + p { margin-top: 1rem; }
.problem blockquote { margin: 0; padding: 0 0 0 1.4rem; border-left: 4px solid var(--accent); font: 700 1.6rem/1.25 var(--head); letter-spacing: -0.01em; }
@media (max-width: 760px) { .problem .cols { grid-template-columns: 1fr; gap: 2rem; } }

/* stop */
.stop { background: var(--tint); }
.stop .scene { margin-top: 2.2rem; background: var(--surface); border-radius: 22px; border: 1px solid var(--line); padding: 1rem 1rem 0.4rem; }
.stop svg { width: 100%; height: auto; display: block; }
.stop .cap { text-align: right; font-size: 0.82rem; color: var(--muted); padding: 0.2rem 0.4rem 0.5rem; }
.rows { margin-top: 2rem; }
.rows div.r { display: grid; grid-template-columns: 14rem 1fr; gap: 1.5rem; padding: 1.3rem 0; border-top: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); }
.rows div.r:last-child { border-bottom: 1px solid color-mix(in srgb, var(--ink) 20%, transparent); }
.rows p { color: var(--muted); max-width: 36rem; }
@media (max-width: 640px) { .rows div.r { grid-template-columns: 1fr; gap: 0.3rem; } }

/* steps */
.steps ol { list-style: none; padding: 0; margin: 2.2rem 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.6rem; counter-reset: s; }
.steps li { counter-increment: s; position: relative; padding-top: 3.4rem; }
.steps li::before { content: counter(s); position: absolute; top: 0; left: 0; width: 2.5rem; height: 2.5rem; border-radius: 50%; background: var(--btn); color: #fff; display: grid; place-items: center; font: 800 1.1rem var(--head); }
.steps li:not(:last-child)::after { content: ""; position: absolute; top: 1.25rem; left: 3.1rem; right: -1rem; height: 2px; background: var(--line); }
.steps li p { color: var(--muted); margin-top: 0.4rem; font-size: 1rem; }
@media (max-width: 860px) { .steps ol { grid-template-columns: 1fr 1fr; } .steps li::after { display: none; } }
@media (max-width: 480px) { .steps ol { grid-template-columns: 1fr; } }

/* audiences */
.aud .three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.4rem; margin-top: 2.2rem; }
.aud .three > div { border-top: 3px solid var(--brand); padding-top: 1rem; }
.aud p { color: var(--muted); margin-top: 0.5rem; }
.aud a.more { display: inline-block; margin-top: 0.8rem; font-weight: 600; }
@media (max-width: 760px) { .aud .three { grid-template-columns: 1fr; gap: 1.8rem; } }

/* team */
.team .two { display: grid; grid-template-columns: 1fr 1fr; gap: 2.4rem; margin-top: 2.2rem; }
.person { display: grid; grid-template-columns: 4.5rem 1fr; gap: 1.2rem; }
.avatar { width: 4.5rem; height: 4.5rem; border-radius: 50%; background: var(--btn); color: #fff; display: grid; place-items: center; font: 800 1.5rem var(--head); }
.person .role { color: var(--brand); font-weight: 600; margin: 0.15rem 0 0.5rem; }
.person p.bio { color: var(--muted); }
@media (max-width: 760px) { .team .two { grid-template-columns: 1fr; } }

/* faq */
.faq details { border-top: 1px solid var(--line); padding: 1.1rem 0; }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font: 700 1.15rem var(--head); letter-spacing: -0.01em; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; line-height: 1; color: var(--brand); }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); margin-top: 0.7rem; max-width: 40rem; }

/* join */
.join { background: var(--deep); color: var(--deep-text); }
.join .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.join h2 { color: var(--deep-text); }
.join .lead { color: color-mix(in srgb, var(--deep-text) 78%, transparent); margin-top: 1rem; }
.join .contact { margin-top: 1.6rem; color: color-mix(in srgb, var(--deep-text) 85%, transparent); }
.join .contact a { color: #7FD39B; }
form { display: grid; gap: 1rem; }
form label { display: grid; gap: 0.35rem; font-weight: 600; font-size: 0.95rem; }
form input, form select, form textarea { font: 400 1rem var(--body); padding: 0.8rem 0.9rem; border-radius: 12px; border: 1px solid #3a5042; background: #0A130E; color: #E8F1EA; width: 100%; }
form input::placeholder, form textarea::placeholder { color: #8CA092; }
form .btn { background: var(--accent); color: #14261C; justify-self: start; }
#status { min-height: 1.4em; font-size: 0.95rem; color: #7FD39B; }
@media (max-width: 860px) { .join .grid { grid-template-columns: 1fr; gap: 2rem; } }

footer { padding: 2rem 0 5.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.92rem; }
footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
footer a { color: var(--muted); }

.sticky { display: none; }
@media (max-width: 760px) {
  .sticky { display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; padding: 0.7rem 1.25rem; background: color-mix(in srgb, var(--bg) 94%, transparent); backdrop-filter: blur(8px); border-top: 1px solid var(--line); }
  .sticky .btn { display: block; text-align: center; }
}