/* CTF page. Fonts, colors, header, and footer come from site.css. */

.ctf { padding: clamp(40px, 10vh, 96px) 0 40px; }
.ctf-hero { max-width: 640px; }
.ctf-hero h1 { margin: 0; font: 600 clamp(56px, 9vw, 112px)/.95 var(--serif); letter-spacing: -.025em; }
.ctf-lede { margin: 22px 0 0; font: 400 clamp(19px, 2vw, 22px)/1.5 var(--serif); }
.ctf-lede code { color: var(--alarm); }

/* Progress: six segments, one per flag */
.score { margin-top: 34px; }
.score-bar { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.score-bar i { height: 6px; border-radius: 3px; background: var(--rule); transition: background-color .4s; }
.score-bar i.on { background: var(--alarm); }
#score { margin: 8px 0 0; font: 12px var(--mono); color: var(--dim); }

.flag-form { display: flex; gap: 8px; margin-top: 22px; }
.flag-form input {
  flex: 1; min-width: 0; padding: 12px 14px;
  border: 1px solid var(--rule); border-radius: 8px;
  background: var(--panel); color: var(--text); font: 15px var(--mono);
  outline: none; transition: border-color .2s;
}
.flag-form input:focus { border-color: var(--text); }
.flag-form button {
  padding: 0 20px; border: 1px solid var(--text); border-radius: 8px;
  background: var(--text); color: var(--bg); font: 600 15px var(--sans); cursor: pointer;
}
.flag-form button:hover { background: var(--alarm); border-color: var(--alarm); }
.flag-msg { min-height: 1.6em; margin: 10px 0 0; font: 13px var(--mono); color: var(--dim); }
.flag-msg.good { color: var(--ok); }
.flag-msg.bad { color: var(--alarm); }

/* Challenges, laid out like the work tree on the homepage */
.chals { position: relative; margin: 72px 0 0; padding: 0 0 0 28px; list-style: none; max-width: 720px; }
.chals::before { content: ""; position: absolute; left: 5px; top: 10px; bottom: 10px; width: 1px; background: var(--rule); }
.chals li { position: relative; padding: 0 0 34px; }
.chals li::before {
  content: ""; position: absolute; left: -28px; top: 6px;
  width: 11px; height: 11px; border: 1px solid var(--faint); border-radius: 50%; background: var(--bg);
}
.chals h3 { margin: 2px 0 4px; font: 600 25px/1.2 var(--serif); }
.chals p { margin: 0 0 8px; color: var(--dim); }
.chals .files { display: flex; gap: 16px; }
.chals .files a { font: 13px var(--mono); }
.chals .snip { max-width: none; }
.chals li.solved::before { background: var(--alarm); border-color: var(--alarm); }
.chals li.solved h3::after { content: " ✓"; color: var(--alarm); }
.chals li.solved .pid { color: var(--alarm); }