:root{--bg1:#0b0f2b;--bg2:#180a2f;--ink:#eef2ff;--border:#ffffff1a;--shadow:0 20px 50px rgba(0,0,0,.45)}
*{box-sizing:border-box}html,body{height:100%}
body{margin:0;font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial;color:var(--ink);
background:radial-gradient(1200px 800px at 70% -10%,#291c5b 0%,transparent 60%),radial-gradient(1000px 800px at -20% 120%,#1a2a6c 10%,transparent 60%),linear-gradient(160deg,var(--bg1),var(--bg2));-webkit-tap-highlight-color:transparent}
.sr{position:absolute;left:-9999px}
.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;background:#0c1235cc;border-bottom:1px solid var(--border);backdrop-filter:blur(6px)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.2px}.logo{font-size:18px}
.controls select,.profile select{appearance:none;padding:8px 12px;border-radius:10px;border:1px solid var(--border);background:#0f1642;color:#fff;font-weight:600}
.container{max-width:1000px;margin:0 auto;padding:18px 14px}
.hero{margin-top:14px;padding:18px;border:1px solid var(--border);border-radius:16px;background:linear-gradient(180deg,#12163a 0%,#0e1131 100%);box-shadow:var(--shadow),inset 0 0 0 1px #ffffff10}
.hero h1{margin:0 0 6px;font-size:clamp(20px,4.5vw,34px)}.hero p{margin:0;color:#ced6ff}
.profile{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.btn{width:100%;display:inline-flex;justify-content:center;align-items:center;gap:8px;padding:12px 14px;border-radius:12px;text-decoration:none;font-weight:800;color:#fff;border:1px solid #7aa2ff55;background:linear-gradient(180deg,#22336f,#1b2a5a);touch-action:manipulation}
.btn.small{padding:8px 10px;border-radius:10px}
.grid{margin-top:14px;display:grid;gap:12px;grid-template-columns:1fr}
@media(min-width:760px){.grid{grid-template-columns:repeat(3,1fr)}}
.card{display:flex;flex-direction:column;gap:10px;min-height:170px;background:linear-gradient(180deg,#0f1642,#0e1336);border:1px solid var(--border);border-radius:16px;padding:14px;box-shadow:inset 0 0 22px #0006}
.card-body h3{margin:0 0 4px;font-size:18px}.card-body p{margin:0;color:#cfd5ff}
.btn-group{display:grid;gap:10px}@media(min-width:760px){.btn-group{grid-template-columns:1fr 1fr}}
.code{background:#0d1237;border:1px solid var(--border);padding:8px 10px;border-radius:8px;font-family:ui-monospace,Menlo,Consolas,monospace;overflow:auto}
.howto{margin-top:12px}.foot{padding:16px;color:#aeb6ff;font-size:13px;text-align:center}