:root{
  --bg:#ffffff; --bg2:#fafafa; --ink:#0a0a0b; --muted:#6b7280;
  --border:#e7e7ea; --card:#ffffff; --accent:#E54D5E; --accent-hover:#C93D4E;
  --grad-a:#E54D5E; --grad-b:#8b5cf6; --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.muted{color:var(--muted)}
.pad{padding:24px}

/* Top nav */
.topnav{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;
  padding:16px 28px;background:rgba(255,255,255,.8);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.brand{font-weight:800;font-size:18px;letter-spacing:-.4px;display:flex;align-items:center;gap:7px}
.logo{color:var(--accent)}
.navlinks{display:flex;align-items:center;gap:22px}
.navlinks a{color:var(--muted);font-size:14px;font-weight:500}
.navlinks a:hover{color:var(--ink)}
.btn-signin{background:var(--ink);color:#fff;border:none;border-radius:10px;padding:9px 18px;font-size:14px;font-weight:600;cursor:pointer}
.btn-signin:hover{opacity:.88}

/* Hero */
.hero{max-width:820px;margin:0 auto;padding:70px 24px 40px;text-align:center}
.pill{display:inline-block;padding:6px 14px;border:1px solid var(--border);border-radius:999px;font-size:13px;color:var(--muted);margin-bottom:26px;background:var(--bg2)}
h1{font-size:66px;line-height:1.03;font-weight:800;letter-spacing:-2.5px;margin:0 0 22px}
.grad{background:linear-gradient(100deg,var(--grad-a),var(--grad-b));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{font-size:19px;line-height:1.6;color:var(--muted);max-width:600px;margin:0 auto 36px}

.prompt-bar{display:flex;align-items:center;justify-content:space-between;max-width:560px;margin:0 auto;
  padding:16px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--card);
  box-shadow:0 8px 30px rgba(0,0,0,.06);cursor:pointer;transition:.15s}
.prompt-bar:hover{border-color:#d1d1d6;box-shadow:0 12px 40px rgba(0,0,0,.09)}
.prompt-bar .ph{color:#9ca3af;font-size:16px}
.prompt-bar .send{width:34px;height:34px;border-radius:9px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px}

.stats{display:flex;justify-content:center;gap:48px;margin-top:52px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;align-items:center}
.stat b{font-size:34px;font-weight:800;letter-spacing:-1px}
.stat span{color:var(--muted);font-size:13px;margin-top:2px;text-transform:uppercase;letter-spacing:.6px}

/* Sections */
.section{max-width:1080px;margin:0 auto;padding:70px 24px}
.section-head{text-align:center;margin-bottom:34px}
.section-head h2{font-size:34px;font-weight:800;letter-spacing:-1px;margin:0 0 8px}
.section-head p{margin:0}

/* Model grid */
.model-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.model-card{border:1px solid var(--border);border-radius:14px;padding:18px;background:var(--card);cursor:pointer;transition:.15s}
.model-card:hover{border-color:#d1d1d6;box-shadow:0 8px 24px rgba(0,0,0,.06);transform:translateY(-2px)}
.m-name{font-weight:700;font-size:15px;margin-bottom:12px;word-break:break-word}
.m-meta{display:flex;align-items:center;gap:8px}
.tag{display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;height:22px;padding:0 8px;border-radius:999px;
  font-size:10.5px;font-weight:650;line-height:1;letter-spacing:.02em;white-space:nowrap;color:var(--accent);background:rgba(229,77,94,.1);border:1px solid rgba(229,77,94,.2)}
.ctx{font-size:12px;color:var(--muted)}

/* Why */
.why{background:var(--bg2);max-width:none;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.why > *{max-width:1080px;margin-left:auto;margin-right:auto}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.why-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px}
.why-card .ic{font-size:26px;margin-bottom:12px}
.why-card h3{margin:0 0 8px;font-size:16px}
.why-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.55}
@media(max-width:860px){.why-grid{grid-template-columns:1fr 1fr}}

/* Footer */
.foot{max-width:1080px;margin:0 auto;padding:36px 24px;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--border);flex-wrap:wrap;gap:10px}

/* Login modal */
.modal-bg{position:fixed;inset:0;background:rgba(10,10,11,.5);backdrop-filter:blur(3px);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal-bg.hidden{display:none}
.login-card{position:relative;background:var(--card);border:1px solid var(--border);border-radius:18px;padding:30px;width:100%;max-width:390px;box-shadow:0 30px 80px rgba(0,0,0,.25)}
.login-card h2{margin:0 0 20px;font-size:22px}
.modal-x{position:absolute;top:16px;right:16px;background:none;border:none;font-size:16px;color:var(--muted);cursor:pointer}
.login-card label{display:block;font-size:13px;color:var(--muted);margin-bottom:15px}
.login-card input{display:block;width:100%;margin-top:6px;padding:12px 14px;background:#fff;border:1px solid var(--border);border-radius:10px;color:var(--ink);font-size:15px}
.login-card input:focus{outline:none;border-color:var(--accent)}
.btn-primary{width:100%;padding:13px;margin-top:4px;background:var(--accent);color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer}
.btn-primary:hover{background:var(--accent-hover)}
.btn-primary:disabled{opacity:.6;cursor:default}
.err{color:var(--accent);font-size:13px;min-height:18px;margin:10px 0 0}

@media(max-width:640px){h1{font-size:44px;letter-spacing:-1.5px}.stats{gap:30px}.navlinks a{display:none}}