:root{
  --bg:#070a10; --bg2:#0b0f17; --card:#111725; --line:#1e2635;
  --fg:#e8ecf4; --muted:#8a93a6; --accent:#2b8bff; --accent2:#5ab0ff;
  --danger:#ff6b6b; --ok:#46d19e;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Segoe UI",Inter,system-ui,-apple-system,sans-serif;
  background:radial-gradient(1200px 700px at 50% -10%,#101a2e 0%,var(--bg) 55%);
  color:var(--fg); min-height:100vh;
}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.nav{display:flex;align-items:center;justify-content:space-between;
  padding:18px 32px;max-width:1100px;margin:0 auto}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;letter-spacing:.5px}
.brand img{height:40px;width:auto;filter:drop-shadow(0 2px 8px rgba(43,139,255,.4))}
.nav-links{display:flex;gap:22px;align-items:center}
.nav-links a{color:var(--muted);font-size:14px;font-weight:600}
.nav-links a:hover{color:var(--fg);text-decoration:none}

/* hero */
.hero{max-width:1100px;margin:60px auto 0;padding:0 32px;text-align:center}
.hero img.logo{height:170px;margin-bottom:8px;filter:drop-shadow(0 8px 30px rgba(43,139,255,.35))}
.hero h1{font-size:46px;margin:10px 0 6px;letter-spacing:1px}
.hero p{color:var(--muted);font-size:18px;max-width:560px;margin:0 auto 30px}
.badge{display:inline-block;background:rgba(43,139,255,.12);color:var(--accent2);
  border:1px solid rgba(43,139,255,.3);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:600;margin-bottom:22px}

/* buttons */
.btn{display:inline-block;background:var(--accent);color:#fff;border:none;border-radius:10px;
  padding:13px 26px;font-size:15px;font-weight:700;cursor:pointer;transition:.15s}
.btn:hover{background:#1f6fe0;text-decoration:none}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--fg)}
.btn.ghost:hover{border-color:var(--accent);background:rgba(43,139,255,.08)}
.btn.block{width:100%;text-align:center}

/* cards / forms */
.wrap{max-width:420px;margin:50px auto;padding:0 24px}
.card{background:linear-gradient(180deg,var(--card),#0d1320);border:1px solid var(--line);
  border-radius:16px;padding:32px 30px;box-shadow:0 20px 60px rgba(0,0,0,.45)}
.card h2{margin:0 0 4px;font-size:24px}
.card .sub{color:var(--muted);font-size:14px;margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px;font-weight:600}
.field input{width:100%;background:#0c121e;border:1px solid var(--line);border-radius:10px;
  color:var(--fg);padding:12px 14px;font-size:15px;outline:none;transition:.15s}
.field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(43,139,255,.15)}
.msg{font-size:14px;padding:10px 12px;border-radius:9px;margin-bottom:14px;display:none}
.msg.err{display:block;background:rgba(255,107,107,.1);color:var(--danger);border:1px solid rgba(255,107,107,.3)}
.msg.ok{display:block;background:rgba(70,209,158,.1);color:var(--ok);border:1px solid rgba(70,209,158,.3)}
.switch{text-align:center;margin-top:18px;color:var(--muted);font-size:14px}

/* dashboard */
.dash{max-width:720px;margin:40px auto;padding:0 24px}
.stat{display:flex;justify-content:space-between;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:14px}
.stat .k{color:var(--muted);font-size:13px}
.stat .v{font-size:18px;font-weight:700}
.pill{padding:4px 12px;border-radius:999px;font-size:13px;font-weight:700}
.pill.on{background:rgba(70,209,158,.14);color:var(--ok)}
.pill.off{background:rgba(255,107,107,.14);color:var(--danger)}
.features{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:40px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;width:200px;text-align:left}
.feat h3{margin:0 0 6px;font-size:15px}
.feat p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}
.foot{text-align:center;color:#39404f;font-size:12px;padding:40px 0 20px}