/* LinkPeek — skin "outil d'aperçu de lien / navigateur". Marque CyberArena conservee. */
:root{
  --bg:#050816; --primary:#00e5ff; --primary-soft:rgba(0,229,255,.16);
  --secondary:#8b5cf6; --text:#f8fafc; --muted:#94a3b8;
  --border:rgba(148,163,184,.22); --shadow:0 24px 80px rgba(0,0,0,.55);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;min-height:100vh;color:var(--text);
  background:radial-gradient(circle at top left,rgba(0,229,255,.16),transparent 34%),
             radial-gradient(circle at bottom right,rgba(139,92,246,.22),transparent 36%),var(--bg);}
.background-grid{position:fixed;inset:0;z-index:-1;
  background-image:linear-gradient(rgba(148,163,184,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(148,163,184,.06) 1px,transparent 1px);
  background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 85%)}

.page{max-width:780px;margin:0 auto;padding:38px 18px}

/* top brand row */
.topnav{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.brand{display:flex;align-items:center;gap:12px}
.logo-image-wrap{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:radial-gradient(circle at top,rgba(151,71,255,.35),transparent 60%),rgba(10,8,24,.92);
  border:1px solid rgba(151,71,255,.45);box-shadow:0 0 18px rgba(151,71,255,.35)}
.logo-image{width:86%;height:86%;object-fit:contain;filter:drop-shadow(0 0 7px rgba(151,71,255,.6))}
.brand h1{font-size:1.15rem;letter-spacing:-.03em}
.brand p{color:var(--muted);font-size:.8rem;margin-top:2px}
.challenge-badge{padding:6px 11px;border-radius:999px;background:var(--primary-soft);
  border:1px solid rgba(0,229,255,.24);color:var(--primary);font-size:.7rem;font-weight:800;letter-spacing:.12em}

/* hero */
.hero h2{font-size:2.1rem;letter-spacing:-.05em;margin-bottom:6px}
.hero .subtitle{color:var(--muted);margin-bottom:22px}

/* fake browser window */
.browser{border:1px solid var(--border);border-radius:18px;overflow:hidden;background:rgba(12,18,38,.92);box-shadow:var(--shadow)}
.browser-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;background:rgba(2,6,23,.6);border-bottom:1px solid var(--border)}
.dots{display:flex;gap:7px}
.dots i{width:12px;height:12px;border-radius:50%;display:block}
.dots i:nth-child(1){background:#ff5f57}.dots i:nth-child(2){background:#febc2e}.dots i:nth-child(3){background:#28c840}
.url-form{display:flex;flex:1;gap:10px}
.url-input{flex:1;display:flex;align-items:center;gap:8px;background:rgba(2,6,23,.7);border:1px solid var(--border);
  border-radius:999px;padding:9px 16px}
.url-input::before{content:"🔒";font-size:.8rem;opacity:.7}
.url-input input{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-size:.92rem}
.url-input input::placeholder{color:#64748b}
.go-btn{border:none;cursor:pointer;border-radius:999px;padding:9px 20px;font-weight:800;font-size:.9rem;color:#020617;
  background:linear-gradient(135deg,var(--primary),var(--secondary));box-shadow:0 10px 26px rgba(0,229,255,.22)}
.go-btn:hover{filter:brightness(1.07)}

/* preview viewport */
.viewport{padding:20px}
.preview-card{border:1px solid var(--border);border-radius:14px;overflow:hidden;background:rgba(2,6,23,.5)}
.preview-head{padding:10px 14px;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  border-bottom:1px solid var(--border);background:rgba(0,229,255,.05)}
.preview-body{padding:16px;white-space:pre-wrap;word-break:break-word;font-family:"Cascadia Code","Fira Code",Consolas,monospace;
  font-size:.86rem;color:#cfe9ff;max-height:340px;overflow:auto}
.empty{padding:30px 16px;text-align:center;color:#64748b;font-size:.9rem}

.hint-box{margin-top:20px;padding:14px;border-radius:14px;background:rgba(15,23,42,.7);border:1px dashed rgba(148,163,184,.28)}
.hint-title{display:block;color:var(--primary);font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;margin-bottom:5px}
.hint-box p{color:var(--muted);font-size:.86rem}
@media(max-width:560px){.url-form{flex-direction:column}.go-btn{width:100%}}