:root { --bg:#08030f; --panel:rgba(31,15,58,.84); --text:#f8f3ff; --muted:#cbb9dd; --line:rgba(255,255,255,.14); --pink:#ff4fd8; --violet:#8b5cf6; --cyan:#35e6ff; --lime:#b7ff5a; --shadow:0 24px 80px rgba(0,0,0,.45); }
*{box-sizing:border-box;margin:0;padding:0} html{scroll-behavior:smooth} body{min-height:100vh;background:radial-gradient(circle at 12% 8%,rgba(255,79,216,.2),transparent 26rem),radial-gradient(circle at 88% 12%,rgba(53,230,255,.16),transparent 24rem),linear-gradient(135deg,#08030f 0%,#160825 52%,#090312 100%);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6} body.nav-open{overflow:hidden} a{color:inherit;text-decoration:none}
.site-header{position:fixed;top:0;z-index:20;width:100%;border-bottom:1px solid transparent;transition:background .25s ease,border-color .25s ease}.site-header.scrolled{background:rgba(8,3,15,.84);border-color:var(--line);backdrop-filter:blur(18px)}.navbar{display:flex;align-items:center;justify-content:space-between;width:min(1160px,calc(100% - 32px));height:78px;margin:0 auto}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:900}.brand small{display:block;color:var(--muted);font-size:.68rem;font-weight:600}.brand-mark{display:grid;width:40px;height:40px;place-items:center;border:1px solid rgba(255,255,255,.22);border-radius:12px;background:linear-gradient(135deg,var(--pink),var(--violet),var(--cyan));box-shadow:0 0 34px rgba(139,92,246,.42);font-size:.82rem}.nav-links{display:flex;align-items:center;gap:22px;color:var(--muted);font-size:.92rem;font-weight:700}.nav-links a{transition:color .2s ease,transform .2s ease}.nav-links a:hover,.nav-links a.active{color:var(--text)}.nav-links a:hover{transform:translateY(-1px)}.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.06)}.nav-toggle span{display:block;width:18px;height:2px;margin:4px auto;border-radius:99px;background:var(--text)}
.section{width:min(1160px,calc(100% - 32px));margin:0 auto;padding:92px 0;scroll-margin-top:92px}.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,1fr);align-items:center;min-height:86vh;gap:42px;padding-top:132px}.eyebrow{margin-bottom:14px;color:var(--cyan);font-size:.78rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}h1,h2,h3{line-height:1.08;letter-spacing:0}h1{font-size:clamp(2.7rem,7vw,5.4rem)}h2{font-size:clamp(1.8rem,3vw,2.8rem)}h3{font-size:1.2rem}.hero p,.feature p{color:var(--muted)}.hero p{max-width:650px;margin-top:20px;font-size:1.08rem}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border:0;border-radius:12px;font:inherit;font-weight:900;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.btn:hover,.feature:hover,.prompt-card:hover,.learning-card:hover{transform:translateY(-4px)}.btn.primary{color:var(--text);background:linear-gradient(135deg,var(--pink),var(--violet));box-shadow:0 16px 42px rgba(255,79,216,.22)}
.assistant-panel,.feature,.prompt-card,.learning-card{border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,var(--panel),rgba(16,7,30,.84));box-shadow:var(--shadow);transition:transform .2s ease,border-color .2s ease}.assistant-panel{display:grid;gap:18px;padding:24px}.assistant-header{display:flex;align-items:center;gap:10px}.assistant-header small{color:var(--lime)}.pulse{width:12px;height:12px;border-radius:50%;background:var(--lime);box-shadow:0 0 24px var(--lime)}.chat-log{display:grid;align-content:start;gap:12px;min-height:320px;max-height:420px;overflow:auto;padding:14px;border:1px solid var(--line);border-radius:16px;background:rgba(8,3,15,.62)}.bubble{max-width:86%;padding:13px 15px;border:1px solid var(--line);border-radius:16px;color:var(--muted);background:rgba(255,255,255,.06)}.bubble.user{justify-self:end;color:var(--text);background:rgba(139,92,246,.24)}.chat-form{display:grid;grid-template-columns:1fr auto;gap:10px}.chat-form input{min-height:48px;padding:0 14px;border:1px solid var(--line);border-radius:12px;outline:0;color:var(--text);background:rgba(8,3,15,.72)}.section-heading{margin-bottom:34px}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.feature,.prompt-card,.learning-card{padding:24px}.feature:hover,.prompt-card:hover,.learning-card:hover{border-color:rgba(53,230,255,.38)}.prompt-section{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}.prompt-card{display:grid;gap:12px}.prompt-btn{padding:14px;border:1px solid var(--line);border-radius:14px;color:var(--text);background:rgba(255,255,255,.06);cursor:pointer;text-align:left;font-weight:800}.prompt-btn:hover{border-color:rgba(53,230,255,.38);background:rgba(53,230,255,.1)}.learning-card{display:grid;gap:16px}.track{display:flex;justify-content:space-between;gap:14px;padding:14px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.05)}.track span{color:var(--muted)}.track strong{color:var(--lime)}.footer{display:flex;flex-wrap:wrap;gap:18px;justify-content:space-between;width:min(1160px,calc(100% - 32px));margin:0 auto;padding:32px 0 44px;border-top:1px solid var(--line);color:var(--muted)}.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s ease,transform .7s ease}.reveal.visible{opacity:1;transform:translateY(0)}
@media(max-width:980px){.hero,.feature-grid,.prompt-section{grid-template-columns:1fr 1fr}}@media(max-width:760px){.nav-toggle{display:block}.nav-links{position:fixed;inset:78px 16px auto;display:grid;gap:6px;padding:16px;border:1px solid var(--line);border-radius:18px;background:rgba(13,5,25,.97);box-shadow:var(--shadow);opacity:0;pointer-events:none;transform:translateY(-10px);transition:opacity .2s ease,transform .2s ease}.nav-links.open{opacity:1;pointer-events:auto;transform:translateY(0)}.nav-links a{padding:12px}.section{width:min(100% - 24px,1160px);padding:72px 0}.hero,.feature-grid,.prompt-section{grid-template-columns:1fr}.hero{min-height:auto;padding-top:128px}.chat-form{grid-template-columns:1fr}.chat-form .btn{width:100%}}
.language-toggle{min-height:36px;padding:0 12px;border:1px solid rgba(53,230,255,.34);border-radius:999px;background:rgba(53,230,255,.1);color:var(--text);cursor:pointer;font:inherit;font-weight:900}.language-toggle:hover{border-color:rgba(255,255,255,.36);background:rgba(255,255,255,.1)}@media(max-width:760px){.language-toggle{width:100%;min-height:44px}}