:root{
  --bg:#0b0f16; --panel:#0f1720; --muted:#9aa6b2; --text:#e6edf3; --accent:#7c9cff; --ok:#22c55e; --bad:#ef4444; --line:#1b2432;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:24px}
header.nav{position:sticky;top:0;z-index:50;background:rgba(11,15,22,.75);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 24px}
.brand{font-weight:800;letter-spacing:.2px}
.nav-links{display:flex;gap:16px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(180deg,#2a3b62,#223357);color:#e6edf3;border:1px solid #2e3a55;padding:10px 14px;border-radius:12px;font-weight:600}
.btn.secondary{background:#121a27;border-color:#25324a;color:#c9d3df}
.hero{display:grid;grid-template-columns:1fr;gap:24px;padding:40px 24px}
@media(min-width:900px){.hero{grid-template-columns:1.2fr .8fr;align-items:center}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
h1{font-size:clamp(1.6rem,3.5vw,2.4rem);margin:.2rem 0}
.lead{color:var(--muted);margin:.2rem 0 1rem}
.taglist{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.tag{font-size:.8rem;padding:6px 10px;border-radius:9999px;border:1px solid #273042;color:#cbd5e1}
section{margin-top:28px}
h2{font-size:1.3rem;margin:0 0 12px}
.grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:760px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1040px){.grid{grid-template-columns:repeat(3,1fr)}}
.item h3{margin:.2rem 0 .4rem;font-size:1.05rem}
.item p{color:var(--muted);margin:0}
.kv{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.kv .k{color:#9fb0ff}
.footer{margin:40px 0 16px;color:#8392a6;font-size:.95rem;text-align:center}
.mono{font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}
.avatar{aspect-ratio:1/1;border-radius:16px;border:1px solid var(--line);background:linear-gradient(180deg,#0c131d,#0b0f16);display:flex;align-items:center;justify-content:center}

/* CTF */
.title{display:flex;align-items:center;justify-content:space-between;gap:8px}
.badge{font-size:.75rem;padding:4px 8px;border-radius:9999px;border:1px solid #273042;color:#cbd5e1}
.desc{color:var(--muted);margin:.5rem 0 1rem}
.row{display:flex;gap:8px;align-items:center;margin-top:8px}
input[type=text]{flex:1;background:#0c131d;border:1px solid #1b2432;color:var(--text);padding:12px;border-radius:12px;outline:none}
.hint{margin-top:8px;color:#b8c5d4;font-size:.95rem;display:none}
.result{margin-top:10px;font-weight:700}
.ok{color:var(--ok)}
.bad{color:var(--bad)}
details{border:1px dashed #2a354a;border-radius:12px;padding:10px;margin-top:8px}
summary{cursor:pointer;color:#9fb0ff}
.clip{user-select:all}
.small{font-size:.9rem}

/* Palautus */
.solved-box{
  background:#10311b;
  border:1px solid #1d8f43;
  color:#8ff0a4;
  padding:12px;
  border-radius:12px;
  text-align:center;
  font-weight:600;
  animation:pop .3s ease;
}

input[type=text].solved{
  background:#10311b;
  border-color:#1d8f43;
  color:#c9f7d5;
}
.btn.solved{
  background:#10311b;
  border-color:#1d8f43;
  color:#8ff0a4;
}

@keyframes pop{
  0%{transform:scale(0.96);opacity:.6}
  100%{transform:scale(1);opacity:1}
}

body.locked #ctf-content{
  filter: blur(10px);
  opacity: .65;
  pointer-events: none;
  user-select: none;
}

#gate.overlay{
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(11,15,22,.55);
  backdrop-filter: blur(6px);
  z-index: 100;
}

@media (max-width: 540px){
  .row{flex-direction: column; align-items: stretch}
  .row .btn{width: 100%}
  input[type=text], input[type=password]{width:100%}
}