:root {
  --bg: #0f1117;
  --panel: #171a23;
  --panel-2: #1e222d;
  --border: #2a2f3c;
  --text: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #6ea8fe;
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body { display: flex; flex-direction: column; height: 100dvh; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.brand { font-weight: 600; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.logo { font-size: 20px; }
.status { font-size: 12px; color: var(--muted); }
.status.ok { color: var(--green); }

.chat {
  flex: 1;
  overflow-y: auto;
  padding: 24px 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}

.msg { display: flex; }
.msg.user { justify-content: flex-end; }
.msg.assistant { justify-content: flex-start; }

.bubble {
  max-width: 92%;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--border);
}
.msg.user .bubble {
  background: linear-gradient(180deg, #2b3b63, #24314f);
  border-color: #33436b;
}
.bubble p { margin: 0 0 8px; }
.bubble p:last-child { margin-bottom: 0; }
.muted { color: var(--muted); font-size: 13px; }

.examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.chip {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.chip:hover { border-color: var(--accent); background: #232838; }

/* result cards */
.result { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-top: 10px; background: var(--panel-2); }
.result:first-child { margin-top: 0; }
.result-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.result-headinfo { min-width: 0; }
.copy-btn {
  margin-left: auto;
  flex: none;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color .15s, background .15s, color .15s;
}
.copy-btn:hover { border-color: var(--accent); }
.copy-btn.copied { color: var(--green); border-color: var(--green); }
.badge {
  font-size: 11.5px; font-weight: 700; letter-spacing: .3px;
  padding: 4px 9px; border-radius: 999px; text-transform: uppercase;
}
.badge.valid { background: rgba(52,211,153,.15); color: var(--green); }
.badge.invalid { background: rgba(248,113,113,.15); color: var(--red); }
.badge.unknown { background: rgba(155,163,178,.15); color: var(--muted); }
.result-title { font-weight: 600; }
.result-sub { color: var(--muted); font-size: 12.5px; }

.section-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: .6px;
  color: var(--muted); padding: 12px 14px 4px;
}
.kv { display: grid; grid-template-columns: 150px 1fr; gap: 2px 14px; padding: 2px 14px 10px; }
.kv dt { color: var(--muted); font-size: 13px; padding: 4px 0; }
.kv dd { margin: 0; padding: 4px 0; font-size: 13.5px; word-break: break-word; }

.rails { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px 14px 12px; }
.rail {
  font-size: 12px; padding: 4px 9px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel);
}
.rail .on { color: var(--green); font-weight: 600; }
.rail .off { color: var(--muted); }

.match { font-weight: 600; }
.match.strong { color: var(--green); }
.match.partial { color: var(--amber); }
.match.none { color: var(--red); }

.err { color: var(--red); font-size: 13.5px; padding: 12px 14px; }
.note { color: var(--amber); font-size: 13.5px; }

.typing { color: var(--muted); font-size: 13px; }
.typing::after { content: "▋"; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.composer {
  display: flex; gap: 10px; align-items: flex-end;
  padding: 14px 16px calc(14px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--panel);
  max-width: 860px; width: 100%; margin: 0 auto;
}
#input {
  flex: 1;
  resize: none;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 11px 14px;
  font: inherit;
  max-height: 160px;
}
#input:focus { outline: none; border-color: var(--accent); }
#send {
  background: var(--accent);
  color: #0b1220;
  border: none;
  border-radius: 12px;
  width: 44px; height: 44px;
  font-size: 18px; font-weight: 700;
  cursor: pointer;
  flex: none;
}
#send:disabled { opacity: .5; cursor: default; }

@media (max-width: 560px) {
  .kv { grid-template-columns: 120px 1fr; }
}