:root {
  --bg: #060a08;
  --bg2: #0b1410;
  --panel: #0e1a14;
  --line: #163025;
  --green: #37f7a0;
  --green-dim: #1f8a5c;
  --amber: #ffcf6b;
  --red: #ff5f6b;
  --text: #cfeadd;
  --muted: #6f9384;
  --mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background:
    radial-gradient(1200px 600px at 50% -10%, #0d2018 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.5;
}
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,0.14) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply; opacity: .35;
}
a { color: var(--green); }
.wrap { max-width: 860px; margin: 0 auto; padding: 24px 18px 80px; }
.center { min-height: 100%; display: grid; place-items: center; }
h1, h2, h3 { font-weight: 600; letter-spacing: .5px; }
.glow { color: var(--green); text-shadow: 0 0 12px rgba(55,247,160,.45); }
.muted { color: var(--muted); }
.amber { color: var(--amber); }
.red { color: var(--red); }
.mono-badge { font-size: 12px; color: var(--muted); letter-spacing: 2px; text-transform: uppercase; }

.panel {
  background: linear-gradient(180deg, var(--panel), var(--bg2));
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  box-shadow: 0 0 0 1px rgba(0,0,0,.4), 0 20px 60px -30px rgba(55,247,160,.25);
}
.panel + .panel { margin-top: 16px; }

label { display: block; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin: 12px 0 5px; }
input, select, textarea {
  width: 100%; background: #071009; color: var(--text);
  border: 1px solid var(--line); border-radius: 7px; padding: 11px 12px;
  font-family: var(--mono); font-size: 15px; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--green-dim); box-shadow: 0 0 0 2px rgba(31,138,92,.25); }

button, .btn {
  cursor: pointer; font-family: var(--mono); font-weight: 600; letter-spacing: 1px;
  background: linear-gradient(180deg, #123a28, #0b1a12);
  color: var(--green); border: 1px solid var(--green-dim);
  border-radius: 7px; padding: 11px 16px; text-transform: uppercase; font-size: 13px;
  transition: transform .05s ease, box-shadow .2s ease;
}
button:hover { box-shadow: 0 0 16px -2px rgba(55,247,160,.5); }
button:active { transform: translateY(1px); }
button.secondary { color: var(--muted); border-color: var(--line); background: #0a130e; }
button:disabled { opacity: .4; cursor: not-allowed; box-shadow: none; }

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.grow { flex: 1; }

.topbar {
  position: sticky; top: 0; z-index: 10; margin: -24px -18px 18px; padding: 12px 18px;
  background: rgba(6,10,8,.85); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.timer { font-size: 20px; letter-spacing: 2px; }
.pips { display: flex; gap: 6px; }
.pip { width: 12px; height: 12px; border-radius: 3px; border: 1px solid var(--green-dim); }
.pip.on { background: var(--green); box-shadow: 0 0 10px rgba(55,247,160,.7); }
.langsel { display: inline-flex; gap: 4px; }
.langsel button { padding: 6px 9px; font-size: 11px; }
.langsel button.active { background: #17462f; color: var(--green); }

.chatlog { height: 320px; overflow-y: auto; padding: 8px; background: #050b07; border: 1px solid var(--line); border-radius: 8px; }
.msg { margin: 8px 0; padding: 9px 12px; border-radius: 8px; max-width: 88%; white-space: pre-wrap; }
.msg.me { margin-left: auto; background: #10261a; border: 1px solid var(--green-dim); }
.msg.bot { background: #0c1712; border: 1px solid var(--line); }
.msg.leak { border-color: var(--amber); box-shadow: 0 0 14px -4px rgba(255,207,107,.5); }

.result { white-space: pre-wrap; background: #050b07; border: 1px solid var(--line); border-radius: 8px; padding: 12px; min-height: 60px; }
.result.leak { border-color: var(--amber); }

.sentence { display: flex; gap: 10px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 7px; margin: 6px 0; cursor: pointer; }
.sentence:hover { border-color: var(--green-dim); }
.sentence.sel { border-color: var(--amber); background: #1a1508; }
.sentence input { width: auto; }
.reffacts { border-left: 3px solid var(--green-dim); padding-left: 12px; margin: 10px 0; }
.reffacts div { margin: 6px 0; color: var(--muted); }

.feedback { min-height: 22px; margin-top: 8px; font-size: 13px; }
.hintbox { margin-top: 10px; padding: 10px 12px; border: 1px dashed var(--amber); border-radius: 7px; color: var(--amber); background: #170f04; display: none; }
.hintbox.show { display: block; }

.codechips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.chip { padding: 6px 12px; border: 1px solid var(--green-dim); border-radius: 20px; color: var(--green); letter-spacing: 2px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }
tr.finished td { color: var(--green); }
.rank { color: var(--amber); font-weight: 700; }

.debrief-card { border-left: 3px solid var(--green-dim); padding: 10px 16px; margin: 14px 0; }
.debrief-card h3 { margin: 0 0 6px; }
.debrief-card .lbl { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; margin-top: 8px; }

.hidden { display: none !important; }
.big { font-size: 26px; }
.blink { animation: blink 1.2s steps(2, start) infinite; }
@keyframes blink { to { opacity: .35; } }