/* Vertex Core Academy · site styles
   Vertex Craft Standard: tokens §1.2, type §1.3, spacing scale 4/8/12/16/24/32/48/64/96/128. */

@font-face { font-family: "Plus Jakarta Sans"; src: url("/assets/fonts/PlusJakartaSans-var.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/assets/fonts/JetBrainsMono-var.woff2") format("woff2"); font-weight: 100 800; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url("/assets/fonts/InstrumentSerif-italic-400.woff2") format("woff2"); font-style: italic; font-weight: 400; font-display: swap; }

:root, [data-theme="dark"] {
  --bg: #000000;
  --bg-alt: #0B0B12;
  --surface: #0E0E12;
  --surface-glass: rgba(20, 20, 32, .62);
  --text: #FFFFFF;
  --muted: #9CA3AF;
  --accent: #8B5CF6;
  --accent-2: #3B82F6;
  --soft: #C4B5FD;
  --soft-bg: rgba(139, 92, 246, .14);
  --line: rgba(255, 255, 255, .10);
  --line-strong: rgba(255, 255, 255, .18);
  --shadow: 0 30px 80px -30px rgba(0, 0, 0, .8);
  --glow: rgba(139, 92, 246, .55);
  --phone: #0B0B12;
  --ph-screen: linear-gradient(180deg, #14141F, #0B0B12);
  --ph-text: #FFFFFF; --ph-body: #E5E7EB; --ph-muted: #9CA3AF;
  --ph-card: rgba(255,255,255,.05); --ph-line: rgba(255,255,255,.08);
  --field: rgba(255, 255, 255, .04);
  color-scheme: dark;
}
[data-theme="light"] {
  --bg: #FAFAFA;
  --bg-alt: #FFFFFF;
  --surface: #FFFFFF;
  --surface-glass: rgba(255, 255, 255, .78);
  --text: #0F172A;
  --muted: #64748B;
  --accent: #7C3AED;
  --accent-2: #2563EB;
  --soft: #7C3AED;
  --soft-bg: #EDE9FE;
  --line: rgba(15, 23, 42, .10);
  --line-strong: rgba(15, 23, 42, .18);
  --shadow: 0 24px 60px -30px rgba(15, 23, 42, .35);
  --glow: rgba(124, 58, 237, .22);
  --phone: #FFFFFF;
  --ph-screen: linear-gradient(180deg, #F5F3FF, #FFFFFF);
  --ph-text: #0F172A; --ph-body: #334155; --ph-muted: #64748B;
  --ph-card: #FFFFFF; --ph-line: rgba(15,23,42,.10);
  --field: #FFFFFF;
  color-scheme: light;
}

/* Buttons use the deeper pair in both themes so white text keeps ≥ 4.5:1 */
:root { --grad: linear-gradient(100deg, #7C3AED, #2563EB); --grad-tile: linear-gradient(135deg, #8B5CF6, #3B82F6); }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 500 17px/1.6 "Plus Jakarta Sans", system-ui, sans-serif; letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
  transition: background-color .3s ease, color .3s ease;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -64px; z-index: 300; padding: 12px 16px; background: var(--surface); border-radius: 12px; }
.skip:focus { top: 16px; }

.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 64px); }

/* ---------- type ---------- */
h1, h2, h3 { margin: 0; font-weight: 800; color: var(--text); }
h1 { font-size: clamp(40px, 5.4vw, 76px); line-height: 1.0; letter-spacing: -0.045em; }
h2 { font-size: clamp(32px, 4.4vw, 56px); line-height: 1.04; letter-spacing: -0.035em; max-width: 18ch; }
h3 { font-size: 20px; line-height: 1.3; letter-spacing: -0.02em; font-weight: 700; }
h1 em, h2 em {
  font-family: "Instrument Serif", Georgia, serif; font-style: italic; font-weight: 400;
  font-size: 1.1em; letter-spacing: -0.01em; color: var(--accent); margin-right: -0.05em;
}
p { margin: 0; }
.nw { white-space: nowrap; }
.kicker {
  font: 600 13px/1.4 "JetBrains Mono", ui-monospace, monospace; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 16px;
}
.lede { font-size: clamp(17px, 1.6vw, 20px); color: var(--muted); max-width: 52ch; margin-top: 24px; }
.section-lede { font-size: 18px; color: var(--muted); max-width: 56ch; margin-top: 16px; }
.note { color: var(--muted); font-size: 15px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 24px; border-radius: 999px; border: 1px solid transparent;
  font: 700 16px/1 "Plus Jakarta Sans", sans-serif; letter-spacing: -0.01em; text-decoration: none; cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease, border-color .2s ease;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--grad); color: #FFFFFF; box-shadow: 0 12px 32px -12px var(--glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -12px var(--glow); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); transform: translateY(-2px); }
.btn-sm { min-height: 40px; padding: 8px 16px; font-size: 14px; }
.btn-block { width: 100%; }
.icon-btn {
  width: 40px; height: 40px; display: inline-grid; place-items: center; flex: none;
  border-radius: 12px; border: 1px solid var(--line); background: transparent; color: var(--text); cursor: pointer;
  transition: border-color .2s ease, background-color .2s ease;
}
.icon-btn:hover { border-color: var(--line-strong); background: var(--field); }
.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.text-link { display: inline-block; margin-top: 24px; color: var(--accent); font-weight: 700; text-underline-offset: 4px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent; transition: border-color .3s ease;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 72px; }
.lockup { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); }
.lockup-mark { width: 48px; height: 29px; }
.lockup-text {
  display: flex; flex-direction: column; border-left: 1px solid var(--line-strong); padding-left: 12px;
  font: 700 11px/1.35 "JetBrains Mono", monospace; letter-spacing: .2em;
}
.lockup-accent { color: var(--accent); }
.nav-links { display: flex; gap: 32px; }
.nav-links a { text-decoration: none; color: var(--muted); font-size: 15px; font-weight: 600; transition: color .2s ease; }
.nav-links a:hover { color: var(--text); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle .i-moon { display: none; }
[data-theme="light"] .theme-toggle .i-sun { display: none; }
[data-theme="light"] .theme-toggle .i-moon { display: block; }
.menu-btn { display: none; }
.mobile-menu { display: grid; gap: 4px; padding: 8px 16px 24px; border-bottom: 1px solid var(--line); }
.mobile-menu[hidden] { display: none; }
.mobile-menu a:not(.btn) { padding: 12px 0; text-decoration: none; font-weight: 600; border-bottom: 1px solid var(--line); }
.mobile-menu .btn { margin-top: 16px; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 64px 0 96px; overflow: hidden; }
.hero-glow {
  position: absolute; right: -10%; top: -10%; width: 720px; height: 720px; border-radius: 50%;
  background: radial-gradient(closest-side, var(--glow), transparent 70%); opacity: .55; pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 64px; align-items: center; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 8px 32px; list-style: none; padding: 0; margin: 48px 0 0; color: var(--muted); font-size: 15px; }
.hero-facts strong { color: var(--text); font-weight: 700; }

.hero-visual { position: relative; justify-self: center; width: 100%; max-width: 360px; padding: 24px 0; }
.phone {
  position: relative; width: 300px; margin: 0 auto; padding: 12px; border-radius: 48px;
  background: var(--phone); border: 1px solid var(--line-strong); box-shadow: var(--shadow), 0 0 80px -20px var(--glow);
}
.phone-island { width: 88px; height: 24px; margin: 4px auto 12px; border-radius: 999px; background: #000; }
.phone-screen {
  border-radius: 36px; padding: 24px 16px 16px; min-height: 480px; display: flex; flex-direction: column; gap: 12px;
  background: var(--ph-screen); color: var(--ph-text);
}
.ph-top { display: flex; flex-direction: column; gap: 4px; }
.ph-kicker, .ph-label, .fc-kicker { font: 600 10px/1.4 "JetBrains Mono", monospace; letter-spacing: .14em; text-transform: uppercase; color: var(--ph-muted); }
.ph-title { font-weight: 800; font-size: 20px; letter-spacing: -0.03em; line-height: 1.15; }
.ph-card, .ph-gate { border-radius: 16px; padding: 12px; background: var(--ph-card); border: 1px solid var(--ph-line); }
.ph-card p { font-size: 13px; line-height: 1.45; margin-top: 4px; color: var(--ph-body); }
.ph-gate ul { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 8px; }
.ph-gate li {
  position: relative; padding-left: 28px; font-size: 13px; color: var(--ph-body);
  animation: tick-in .5s cubic-bezier(.16,1,.3,1) both; animation-delay: calc(1.6s + var(--d) * .5s);
}
.ph-gate li::before {
  content: ""; position: absolute; left: 0; top: 1px; width: 18px; height: 18px; border-radius: 6px;
  background: var(--grad-tile);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Crect width='18' height='18' rx='6'/%3E%3C/svg%3E");
}
.ph-gate li::after {
  content: ""; position: absolute; left: 6px; top: 5px; width: 6px; height: 9px;
  border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg);
}
@keyframes tick-in { from { opacity: .25; transform: translateX(-4px); } to { opacity: 1; transform: none; } }
.ph-ship {
  margin-top: auto; display: flex; align-items: center; justify-content: center; gap: 8px; padding: 12px;
  border-radius: 999px; background: var(--grad); color: #FFFFFF; font-weight: 700; font-size: 14px;
  animation: tick-in .6s cubic-bezier(.16,1,.3,1) both; animation-delay: 3.8s;
}
.ph-ship .dot { width: 8px; height: 8px; border-radius: 50%; background: #fff; }
.float-card {
  position: absolute; display: flex; flex-direction: column; gap: 4px; padding: 12px 16px; border-radius: 16px;
  background: var(--surface-glass); border: 1px solid var(--line); box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  animation: drift 6s ease-in-out infinite alternate;
}
.fc-kicker { color: var(--muted); }
.fc-body { font-size: 14px; font-weight: 700; color: var(--text); white-space: nowrap; }
.fc-1 { left: -56px; bottom: -8px; }
.fc-2 { right: -40px; top: 0; animation-delay: -3s; }
@keyframes drift { from { transform: translateY(-4px); } to { transform: translateY(6px); } }

/* ---------- sections ---------- */
.section { padding: 128px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.outcomes { list-style: none; margin: 64px 0 0; padding: 0; border-top: 1px solid var(--line); }
.outcomes li { display: grid; grid-template-columns: 96px 1fr; gap: 24px; padding: 32px 0; border-bottom: 1px solid var(--line); }
.outcomes li > div { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 32px; align-items: baseline; }
.outcomes h3 { font-size: clamp(20px, 2.2vw, 28px); letter-spacing: -0.03em; }
.outcomes p { color: var(--muted); }
.num { font: 600 14px/1.8 "JetBrains Mono", monospace; letter-spacing: .12em; color: var(--accent); }

.path { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 64px; counter-reset: step; }
.step {
  position: relative; display: flex; flex-direction: column; gap: 12px; padding: 32px 24px;
  border-radius: 18px; background: var(--surface); border: 1px solid var(--line);
  transition: transform .25s ease, border-color .25s ease;
}
.step:hover { transform: translateY(-4px); border-color: var(--line-strong); }
.step-n { font: 600 12px/1 "JetBrains Mono", monospace; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.step p { color: var(--muted); font-size: 16px; }
.step-out { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); font-weight: 700; font-size: 15px; color: var(--accent); }
.step:last-child { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }

.week-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.week { list-style: none; margin: 0; padding: 0; border-radius: 24px; border: 1px solid var(--line); background: var(--surface); overflow: hidden; }
.week li { display: grid; grid-template-columns: 112px 1fr; gap: 16px; padding: 24px; border-bottom: 1px solid var(--line); }
.week li:last-child { border-bottom: 0; }
.week .day { font: 600 13px/1.6 "JetBrains Mono", monospace; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.week strong { display: block; font-weight: 700; }
.week li span:not(.day) { color: var(--muted); font-size: 15px; }
.week-key { background: var(--soft-bg); }
.week-key .day { color: var(--accent); }

.tracks { display: grid; grid-template-columns: 1.1fr .9fr; gap: 16px; margin-top: 64px; }
.track { padding: 32px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); }
.track p { color: var(--muted); margin-top: 12px; }
.track-main { border-color: color-mix(in srgb, var(--accent) 45%, transparent); box-shadow: 0 0 64px -32px var(--glow); }
.track-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.track-main h3 { font-size: 28px; letter-spacing: -0.03em; }
.track-side { display: grid; gap: 16px; align-content: start; }
.chip { flex: none; padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line-strong); font: 600 11px/1.6 "JetBrains Mono", monospace; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.chip-on { border-color: transparent; background: var(--soft-bg); color: var(--accent); }
.track-weeks { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 0; }
.track-weeks li { display: grid; grid-template-columns: 88px 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); font-weight: 600; }
.track-weeks span { font: 600 12px/1.9 "JetBrains Mono", monospace; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }

.access { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; margin-top: 64px; }
.access-item svg { width: 32px; height: 32px; fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; margin-bottom: 16px; }
.access-item p { color: var(--muted); font-size: 16px; margin-top: 8px; }

.schol-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.schol-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.schol-steps li { display: grid; grid-template-columns: 48px 1fr; gap: 16px; align-items: start; padding: 24px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); }
.schol-steps .num {
  width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px;
  background: var(--grad-tile); color: #fff; font-size: 15px; letter-spacing: 0;
}
.schol-steps strong { display: block; font-weight: 700; }
.schol-steps li span:not(.num) { color: var(--muted); font-size: 15px; }

.promise h2 { max-width: 20ch; }
.promise-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 48px; }
.promise-cols p { font-size: 19px; line-height: 1.6; color: var(--muted); }
.promise-cols p:first-child { color: var(--text); }

.studio-row { display: grid; grid-template-columns: auto 1fr; gap: 64px; align-items: center; }
.studio-tile { width: 180px; height: 180px; border-radius: 28%; background: var(--grad-tile); display: grid; place-items: center; box-shadow: 0 0 90px -20px var(--glow); }
.studio-tile svg { width: 120px; height: 72px; color: #fff; }

/* ---------- join ---------- */
.join { position: relative; }
.join-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; align-items: start; }
.join-copy { position: sticky; top: 112px; }
.join-points { list-style: none; margin: 32px 0 0; padding: 0; display: grid; gap: 12px; }
.join-points li { position: relative; padding-left: 28px; font-weight: 600; }
.join-points li::before { content: ""; position: absolute; left: 0; top: 8px; width: 12px; height: 12px; border-radius: 4px; background: var(--grad-tile); }
.form-card { padding: clamp(24px, 4vw, 48px); border-radius: 24px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); }
form#join-form, form#build-form { display: grid; gap: 24px; }
.field { display: grid; gap: 8px; min-width: 0; margin: 0; padding: 0; border: 0; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: end; }
label, legend { font-weight: 700; font-size: 15px; padding: 0; }
.opt { font-weight: 500; color: var(--muted); font-size: 13px; margin-left: 4px; }
input[type="text"], input[type="email"], input[type="tel"], input[type="url"], select {
  width: 100%; min-height: 48px; padding: 12px 16px; border-radius: 12px;
  border: 1px solid var(--line-strong); background: var(--field); color: var(--text);
  font: 500 16px/1.3 "Plus Jakarta Sans", sans-serif; transition: border-color .2s ease, box-shadow .2s ease;
}
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 40px; }
select option, select optgroup { background: var(--surface); color: var(--text); }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--soft-bg); }
input[aria-invalid="true"], select[aria-invalid="true"], fieldset[aria-invalid="true"] .choices { border-color: #6D28D9; box-shadow: 0 0 0 3px rgba(109, 40, 217, .25); border-radius: 12px; }
.choices { display: grid; gap: 8px; margin-top: 8px; }
.choices-2 { grid-template-columns: 1fr 1fr; }
.choice { position: relative; display: block; cursor: pointer; }
.choice input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.choice span {
  display: block; padding: 12px 16px; border-radius: 12px; border: 1px solid var(--line-strong);
  font-weight: 600; font-size: 15px; transition: border-color .2s ease, background-color .2s ease;
}
.choice input:checked + span { border-color: var(--accent); background: var(--soft-bg); box-shadow: inset 0 0 0 1px var(--accent); }
.choice input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.check { display: flex; gap: 12px; align-items: flex-start; font-weight: 600; font-size: 15px; cursor: pointer; }
.check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--accent); flex: none; }
.consent span { font-weight: 500; color: var(--muted); }
.consent a { color: var(--accent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-error { padding: 12px 16px; border-radius: 12px; background: var(--soft-bg); color: var(--text); font-weight: 600; font-size: 15px; border-left: 3px solid #6D28D9; }
#join-submit[disabled] { opacity: .7; cursor: progress; }
.form-done { text-align: left; display: grid; gap: 16px; outline: none; }
.form-done[hidden] { display: none; }
.done-mark { width: 72px; height: 72px; border-radius: 28%; background: var(--grad-tile); display: grid; place-items: center; }
.done-mark svg { width: 48px; height: 29px; color: #fff; }
.form-done h3 { font-size: 32px; letter-spacing: -0.035em; }
.form-done p { color: var(--muted); }
.done-next { margin-top: 16px; padding-top: 24px; border-top: 1px solid var(--line); }
.done-next[hidden] { display: none; }
.done-links { display: grid; gap: 12px; }
.done-links a { justify-content: flex-start; }

/* ---------- faq ---------- */
.faq-wrap h2 { margin-bottom: 48px; }
.faq { max-width: 860px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; padding: 24px 48px 24px 0; position: relative;
  font-weight: 700; font-size: 18px; letter-spacing: -0.02em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 8px; top: 50%; width: 12px; height: 12px; margin-top: -8px;
  border: solid var(--muted); border-width: 0 2px 2px 0; transform: rotate(45deg); transition: transform .25s ease;
}
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq details p { padding: 0 0 24px; color: var(--muted); max-width: 70ch; }

/* ---------- footer ---------- */
.footer { padding: 64px 0; border-top: 1px solid var(--line); }
.footer-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 24px; }
.footer-links a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.footer-links a:hover { color: var(--text); }
.footer-note { width: 100%; color: var(--muted); font-size: 14px; font-family: "JetBrains Mono", monospace; letter-spacing: .04em; }

/* ---------- dock: scroll-to-top + chatbot ---------- */
.dock { position: fixed; right: 24px; bottom: 24px; z-index: 150; display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.to-top {
  width: 44px; height: 44px; margin-right: 6px; border-radius: 50%; display: grid; place-items: center; cursor: pointer;
  border: 1px solid var(--line-strong); background: var(--surface-glass); color: var(--text);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  opacity: 0; transform: translateY(8px) scale(.9); pointer-events: none; transition: opacity .25s ease, transform .25s ease;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.chat-trigger {
  position: relative; width: 56px; height: 56px; border-radius: 28%; border: 0; cursor: pointer;
  background: var(--grad-tile); color: #fff; display: grid; place-items: center; box-shadow: 0 16px 40px -12px var(--glow);
  transition: transform .2s ease;
}
.chat-trigger:hover { transform: translateY(-2px); }
.chat-trigger svg { width: 34px; height: 20px; }
.online { position: absolute; top: -3px; right: -3px; width: 14px; height: 14px; border-radius: 50%; background: #C4B5FD; border: 3px solid var(--bg); }
.online::after { content: ""; position: absolute; inset: -3px; border-radius: 50%; border: 2px solid #C4B5FD; animation: ping 2s ease-out infinite; }
@keyframes ping { from { transform: scale(.8); opacity: .9; } to { transform: scale(2); opacity: 0; } }
.chat {
  width: min(380px, calc(100vw - 32px)); height: min(560px, calc(100dvh - 140px)); display: flex; flex-direction: column;
  border-radius: 24px; background: var(--surface); border: 1px solid var(--line-strong); box-shadow: var(--shadow); overflow: hidden;
  animation: pop .25s cubic-bezier(.16,1,.3,1);
}
.chat[hidden] { display: none; }
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }
.chat-head { display: flex; align-items: center; gap: 12px; padding: 16px; border-bottom: 1px solid var(--line); }
.chat-head > div:nth-child(2) { flex: 1; display: grid; }
.chat-head strong { font-size: 16px; }
.chat-status { font-size: 12px; color: var(--muted); }
.chat-avatar { width: 40px; height: 40px; border-radius: 28%; background: var(--grad-tile); display: grid; place-items: center; color: #fff; flex: none; }
.chat-avatar svg { width: 26px; height: 16px; }
.chat-chips { display: flex; gap: 8px; overflow-x: auto; padding: 12px 16px; border-bottom: 1px solid var(--line); scrollbar-width: none; }
.chat-chips::-webkit-scrollbar { display: none; }
.chat-chips button {
  flex: none; padding: 8px 12px; border-radius: 999px; border: 1px solid var(--line-strong); background: transparent;
  color: var(--text); font: 600 13px/1 "Plus Jakarta Sans", sans-serif; cursor: pointer; white-space: nowrap;
}
.chat-chips button:hover { border-color: var(--accent); }
.chat-log { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 88%; padding: 12px 16px; border-radius: 16px; font-size: 15px; line-height: 1.5; }
.msg-bot { align-self: flex-start; background: var(--field); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg-me { align-self: flex-end; background: var(--grad); color: #fff; border-bottom-right-radius: 4px; }
.msg a { color: var(--accent); font-weight: 700; }
.chat-input { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--line); }
.chat-input input { min-height: 44px; }
.chat-send { width: 44px; height: 44px; border-radius: 12px; background: var(--grad); color: #fff; border: 0; }

/* ---------- preloader ---------- */
.preloader {
  position: fixed; inset: 0; z-index: 500; display: grid; place-items: center;
  background: radial-gradient(ellipse at center, #0B0B12 0%, #000 70%); color: #fff;
}
[data-theme="light"] .preloader { background: radial-gradient(ellipse at center, #FFFFFF 0%, #FAFAFA 70%); color: #0F172A; }
.pl-inner { display: grid; justify-items: center; gap: 24px; }
.pl-mark { width: 160px; height: 95px; overflow: visible; fill: currentColor; }
.pl-v { animation: pl-in-v .6s cubic-bezier(.16,1,.3,1) both; }
.pl-c { animation: pl-in-c .6s cubic-bezier(.16,1,.3,1) .12s both; }
.pl-a { animation: pl-in-a .6s cubic-bezier(.16,1,.3,1) .24s both; }
.pl-whole { opacity: 0; }
.preloader.cut .pl-parts { opacity: 0; }
.preloader.cut .pl-whole { opacity: 1; }
@keyframes pl-in-v { from { opacity: 0; transform: translateY(-40px); } to { opacity: 1; transform: none; } }
@keyframes pl-in-c { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: none; } }
@keyframes pl-in-a { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: none; } }
.pl-line { width: 160px; height: 1px; background: rgba(128,128,128,.25); overflow: hidden; }
.pl-line span { display: block; height: 100%; width: 0; background: var(--grad-tile); transition: width .3s ease; }
.pl-hook { font: 600 12px/1.4 "JetBrains Mono", monospace; letter-spacing: .16em; text-transform: uppercase; opacity: .7; animation: fade .6s ease .3s both; }
@keyframes fade { from { opacity: 0; } }
.preloader.done { animation: iris .7s cubic-bezier(.7,0,.3,1) forwards; pointer-events: none; }
@keyframes iris { from { clip-path: circle(150% at 50% 50%); } to { clip-path: circle(0% at 50% 50%); } }
.preloader.gone { display: none; }

/* ---------- reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); transition-delay: var(--rd, 0s); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .path { grid-template-columns: 1fr 1fr; }
  .access { grid-template-columns: 1fr 1fr; }
  .fc-1 { left: -16px; } .fc-2 { right: -8px; }
}
@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .menu-btn { display: inline-grid; }
  .hero { padding: 32px 0 64px; }
  .hero-grid, .week-grid, .tracks, .schol-grid, .join-grid, .promise-cols { grid-template-columns: 1fr; gap: 48px; }
  .hero-glow { width: 480px; height: 480px; right: -40%; }
  .join-copy { position: static; }
  .studio-row { grid-template-columns: 1fr; gap: 32px; }
  .studio-tile { width: 120px; height: 120px; } .studio-tile svg { width: 80px; height: 48px; }
  .outcomes li > div { grid-template-columns: 1fr; gap: 8px; }
  .section { padding: 96px 0; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .section { padding: 64px 0; }
  .outcomes li { grid-template-columns: 48px 1fr; gap: 12px; }
  .path, .access { grid-template-columns: 1fr; }
  .access { gap: 32px; }
  .week li { grid-template-columns: 1fr; gap: 4px; padding: 16px; }
  .track, .step { padding: 24px; }
  .track-weeks li { grid-template-columns: 72px 1fr; }
  .field-row, .choices-2 { grid-template-columns: 1fr; }
  .phone { width: 260px; }
  .phone-screen { min-height: 420px; }
  .float-card { display: none; }
  .hero-facts { gap: 8px 24px; }
  .dock { right: 16px; bottom: 16px; }
  .lockup-text { font-size: 10px; }
  .lockup-mark { width: 40px; height: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* If scripts never run, the loader still gets out of the way */
.preloader { animation: pl-safety 0s linear 3s forwards; }
@keyframes pl-safety { to { visibility: hidden; opacity: 0; } }
.preloader.done { animation: iris .7s cubic-bezier(.7,0,.3,1) forwards; }

/* ---------- learner / builder switcher ---------- */
.mode-switch {
  display: inline-flex; gap: 4px; padding: 4px; margin-bottom: 48px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: var(--surface);
}
.mode-btn {
  min-height: 44px; padding: 8px 24px; border: 0; border-radius: 999px; background: transparent; cursor: pointer;
  color: var(--muted); font: 700 15px/1 "Plus Jakarta Sans", sans-serif; letter-spacing: -0.01em;
  transition: background-color .25s ease, color .25s ease;
}
.mode-btn[aria-pressed="true"] { background: var(--grad); color: #FFFFFF; }
.mode-btn:not([aria-pressed="true"]):hover { color: var(--text); }
.join[data-mode="learn"] .only-build, .join[data-mode="build"] .only-learn { display: none !important; }
.join .form-card form[hidden] { display: none; }
.builder-link { margin-top: 24px; color: var(--muted); font-size: 15px; }
.builder-link a { color: var(--accent); font-weight: 700; text-underline-offset: 4px; }
@media (max-width: 600px) {
  .mode-switch { display: flex; width: 100%; }
  .mode-btn { flex: 1; padding: 8px 12px; font-size: 14px; }
}