/* Learnbuilt — shared styles for tool/hub pages. Mirrors index.html tokens. */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg:#06100A; --surface:#0C1810; --card:#101F14; --border:#1C3024; --border-hi:#2A4A35;
  --green:#00E676; --green-glow:#00E67620; --teal:#00D4AA;
  --text:#EDF5EF; --text-2:#7DAA8A; --text-3:#3D6050;
  --mono:'JetBrains Mono',monospace; --sans:'Inter',sans-serif; --radius:12px; --radius-lg:20px;
}
html { scroll-behavior:smooth; overflow-x:clip; max-width:100%; scroll-padding-top:80px; }
body { background:var(--bg); color:var(--text); font-family:var(--sans); font-size:16px; line-height:1.6; overflow-x:clip; max-width:100%; }
body::before { content:''; position:fixed; inset:0; pointer-events:none; z-index:0; opacity:.4;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E"); }
#cursor-glow { position:fixed; width:700px; height:700px; border-radius:50%; background:radial-gradient(circle, rgba(0,230,118,0.04) 0%, transparent 65%); pointer-events:none; z-index:0; transform:translate(-50%,-50%); left:50%; top:50%; transition:left .08s linear, top .08s linear; }
.container { max-width:1080px; margin:0 auto; padding:0 24px; }
section { position:relative; z-index:1; }
a { color:var(--green); }

/* NAV */
nav { position:fixed; top:0; left:0; right:0; z-index:100; border-bottom:1px solid var(--border); backdrop-filter:blur(20px); background:rgba(6,16,10,0.85); }
.nav-inner { max-width:1280px; margin:0 auto; padding:0 24px; height:64px; display:flex; align-items:center; justify-content:space-between; }
.nav-logo { font-size:18px; font-weight:800; letter-spacing:-0.5px; color:var(--text); text-decoration:none; }
.nav-logo span { color:var(--green); }
.nav-links { display:flex; gap:26px; list-style:none; }
.nav-links a { color:var(--text-2); text-decoration:none; font-size:14px; font-weight:500; transition:color .2s; }
.nav-links a:hover, .nav-links a.active { color:var(--text); }
.nav-cta { background:var(--green); color:#06100A; padding:8px 20px; border-radius:8px; font-size:14px; font-weight:700; text-decoration:none; transition:opacity .2s; }
.nav-cta:hover { opacity:.85; }

/* BUTTONS */
.btn-primary { background:var(--green); color:#06100A; padding:14px 28px; border-radius:10px; font-size:15px; font-weight:700; text-decoration:none; display:inline-flex; align-items:center; gap:8px; border:none; cursor:pointer; font-family:var(--sans); transition:transform .2s, box-shadow .2s; }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(0,230,118,0.25); }
.btn-secondary { background:transparent; color:var(--text); padding:14px 28px; border-radius:10px; font-size:15px; font-weight:600; text-decoration:none; border:1px solid var(--border-hi); transition:border-color .2s, background .2s; }
.btn-secondary:hover { border-color:var(--green); background:var(--green-glow); }

/* HERO */
.hero { padding:150px 0 60px; text-align:center; position:relative; }
.hero::after { content:''; position:absolute; top:0; left:50%; transform:translateX(-50%); width:800px; height:480px; background:radial-gradient(ellipse at center top, rgba(0,230,118,0.07) 0%, transparent 70%); pointer-events:none; }
.hero-badge { display:inline-flex; align-items:center; gap:8px; background:var(--card); border:1px solid var(--border-hi); padding:6px 14px; border-radius:100px; font-size:13px; color:var(--green); font-weight:500; font-family:var(--mono); margin-bottom:28px; }
.hero-badge::before { content:'●'; font-size:8px; animation:pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }
.hero h1 { font-size:clamp(34px,5.5vw,58px); font-weight:900; line-height:1.07; letter-spacing:-1px; color:var(--text); margin:0 auto 22px; max-width:860px; }
.hero h1 em { font-style:normal; background:linear-gradient(135deg, var(--green) 0%, var(--teal) 100%); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }
.hero-sub { font-size:19px; color:var(--text-2); max-width:620px; margin:0 auto 36px; line-height:1.6; }
.hero-actions { display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

/* SECTIONS */
.sec { padding:60px 0; border-top:1px solid var(--border); }
.section-label { font-family:var(--mono); font-size:12px; font-weight:500; color:var(--green); text-transform:uppercase; letter-spacing:.12em; margin-bottom:14px; }
.sec h2 { font-size:clamp(24px,3.4vw,34px); font-weight:800; letter-spacing:-0.7px; line-height:1.15; color:var(--text); margin-bottom:16px; }
.sec p.lead { font-size:17px; color:var(--text-2); line-height:1.7; max-width:680px; }
.narrow { max-width:760px; }

/* HUB CARDS */
.hub-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:20px; margin-top:8px; }
.hub-card { display:flex; flex-direction:column; background:var(--card); border:1px solid var(--border); border-radius:var(--radius-lg); padding:28px; text-decoration:none; transition:border-color .2s, transform .2s; }
.hub-card:hover { border-color:var(--green); transform:translateY(-3px); }
.hub-card .tag { font-family:var(--mono); font-size:11px; text-transform:uppercase; letter-spacing:.1em; color:var(--green); margin-bottom:14px; }
.hub-card h3 { font-size:21px; font-weight:800; color:var(--text); letter-spacing:-0.3px; margin-bottom:10px; }
.hub-card p { font-size:15px; color:var(--text-2); line-height:1.6; flex:1; }
.hub-card .go { margin-top:18px; font-size:14px; font-weight:700; color:var(--green); }
.hub-card.soon { opacity:.6; pointer-events:none; }
.hub-card.soon .tag { color:var(--text-3); }

/* SURVEY FORM */
.survey { max-width:720px; margin:0 auto; }
.survey .q { background:var(--card); border:1px solid var(--border); border-radius:var(--radius); padding:24px; margin-bottom:16px; }
.survey .q legend, .survey .q .qlabel { font-size:16px; font-weight:600; color:var(--text); margin-bottom:14px; display:block; }
.survey .q .hint { font-size:13px; color:var(--text-3); font-weight:400; }
.survey .opts { display:flex; flex-direction:column; gap:10px; border:none; }
.survey .opts label { display:flex; align-items:flex-start; gap:10px; font-size:15px; color:var(--text-2); cursor:pointer; line-height:1.5; }
.survey .opts input { margin-top:3px; accent-color:var(--green); width:16px; height:16px; flex-shrink:0; }
.survey input[type=text], .survey input[type=email], .survey textarea { width:100%; background:var(--bg); border:1px solid var(--border-hi); color:var(--text); padding:12px 14px; border-radius:10px; font-size:15px; font-family:var(--sans); }
.survey textarea { min-height:84px; resize:vertical; }
.survey input:focus, .survey textarea:focus { outline:none; border-color:var(--green); }
.survey .submit-row { text-align:center; margin-top:24px; }
.survey .done { background:var(--card); border:1px solid var(--green); border-radius:var(--radius-lg); padding:48px 32px; text-align:center; }
.survey .done h3 { font-size:24px; color:var(--text); margin-bottom:10px; }
.survey .done p { font-size:16px; color:var(--text-2); max-width:480px; margin:0 auto; }

/* FOOTER */
footer { padding:60px 0 40px; border-top:1px solid var(--border); background:var(--bg); position:relative; z-index:1; }
.footer-inner { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:24px; }
.footer-logo { font-size:18px; font-weight:800; letter-spacing:-0.5px; }
.footer-logo span { color:var(--green); }
.footer-legal { font-size:12px; color:var(--text-3); }
.footer-bottom { margin-top:20px; padding-top:16px; border-top:1px solid var(--border); display:flex; gap:24px; justify-content:flex-end; flex-wrap:wrap; }
.footer-bottom a { font-size:12px; color:var(--text-3); text-decoration:none; }
.footer-bottom a:hover { color:var(--text-2); }

@media (max-width:820px) {
  .nav-links { display:none; }
  .nav-cta { display:none; }
  .hub-grid { grid-template-columns:1fr; }
  .footer-inner { flex-direction:column; align-items:flex-start; }
  .footer-bottom { justify-content:flex-start; }
}