:root{--accent:#00e5ff;--bg:#0b0f17;--text:#e6f2ff;--muted:#9fb3c8}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
a{color:var(--accent);text-decoration:none}
a:hover{opacity:.9}
.container{max-width:1024px;margin:0 auto;padding:24px}
.header{display:flex;align-items:center;justify-content:space-between;padding:24px 0}
.logo{font-weight:800;letter-spacing:.5px}
.nav a{margin-left:16px}
.hero{padding:72px 0;text-align:center}
.hero h1{font-size:clamp(28px,5vw,48px);margin:0 0 12px}
.hero p{color:var(--muted);margin:0 auto 24px;max-width:720px}
.btn{display:inline-block;padding:12px 20px;border:1px solid rgba(255,255,255,.12);border-radius:14px;position:relative}
.btn::after{content:"";position:absolute;inset:-2px;border-radius:16px;filter:blur(12px);opacity:.65;pointer-events:none;box-shadow:0 0 18px var(--accent),0 0 42px var(--accent)}
.card{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.08);border-radius:18px;padding:20px;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.footer{padding:32px 0;text-align:center;border-top:1px solid rgba(255,255,255,.08);margin-top:48px}
.sig{display:block;margin:24px auto 0;opacity:.9;max-width:180px}
.alert{margin:0 0 16px;padding:12px 14px;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:rgba(0,229,255,.08)}
.alert.glow{box-shadow:0 0 18px var(--accent),0 0 42px var(--accent)}
.form fieldset{border:0;padding:0;margin:0}
.input{width:100%;padding:12px 14px;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.10);color:var(--text)}
.input::placeholder{color:#cfe7ff80}
label{display:block;margin:14px 0 6px;color:var(--muted)}
textarea.input{min-height:140px;resize:vertical}
.small{font-size:.9rem;color:var(--muted)}
.active{border-bottom:2px solid var(--accent);padding-bottom:4px}