:root {
  --bg: #0a0d10;
  --bg-2: #10141a;
  --panel: #141a22;
  --panel-2: #1a2230;
  --line: #2a3444;
  --line-2: #384558;
  --text: #d6dde6;
  --text-dim: #8a94a3;
  --accent: #ff4d4d;
  --accent-2: #ff8a3d;
  --amber: #ffb020;
  --green: #35d07f;
  --user: #6bd0ff;
  --danger: #ff4d4d;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --display: "Space Grotesk", ui-sans-serif, system-ui;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(1200px 500px at 90% -10%, rgba(255, 77, 77, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(107, 208, 255, 0.05), transparent 60%);
}

/* subtle grain + scanline for that terminal-ops feel */
.grain {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 1;
  opacity: 0.05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.6'/></svg>");
  mix-blend-mode: overlay;
}
.scanline {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 1;
  background: repeating-linear-gradient(0deg, transparent 0, transparent 3px, rgba(255,255,255,0.014) 3px, rgba(255,255,255,0.014) 4px);
}

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: rgba(10, 13, 16, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  font-family: var(--display);
  letter-spacing: -0.01em;
}
.brand .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2.4s ease-in-out infinite;
  align-self: center;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--accent); }
  50% { opacity: 0.55; box-shadow: 0 0 4px var(--accent); }
}
.brand-title { font-size: 18px; font-weight: 700; color: var(--text); }
.brand-sub { color: var(--text-dim); font-size: 12px; font-family: var(--mono); }

.auth { display: flex; align-items: center; gap: 14px; }
.model-link { color: var(--text-dim); font-size: 12px; text-decoration: none; }
.model-link:hover { color: var(--accent-2); }

.btn {
  font-family: var(--mono);
  font-size: 13px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line-2);
  padding: 8px 14px;
  border-radius: 2px;
  cursor: pointer;
  transition: background 120ms, border-color 120ms, transform 120ms, color 120ms;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary {
  background: linear-gradient(180deg, #ff5a5a, #d43535);
  border-color: #d43535;
  color: #fff;
  font-weight: 700;
}
.btn.primary:hover { border-color: #ffbaba; color: #fff; }
.btn.send {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel-2);
  border-color: var(--line-2);
}
.btn.send .send-key { color: var(--text-dim); font-size: 11px; }
.btn.send:hover:not(:disabled) { background: #22303f; color: var(--accent-2); }

.linkish { background: none; border: 0; color: var(--text-dim); cursor: pointer; font-family: var(--mono); font-size: 12px; padding: 0; }
.linkish:hover { color: var(--accent); }

.user-chip {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 12px;
}
.user-chip img { width: 22px; height: 22px; border-radius: 50%; }
.hidden { display: none !important; }

main {
  position: relative; z-index: 2;
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 28px 80px;
}

.warning {
  border: 1px solid #6b1f1f;
  background: linear-gradient(180deg, rgba(107,31,31,0.35), rgba(107,31,31,0.15));
  color: #f6d5d5;
  padding: 14px 18px;
  border-radius: 4px;
  font-size: 12.5px;
  margin-bottom: 28px;
}
.warning strong { color: #ff8a8a; margin-right: 6px; }
.warning a { color: #ffb3b3; }

.chat-shell {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20,26,34,0.7), rgba(16,20,26,0.7));
  border-radius: 6px;
  overflow: hidden;
}

.messages {
  min-height: 380px;
  max-height: 62vh;
  overflow-y: auto;
  padding: 20px 22px;
  display: flex; flex-direction: column; gap: 18px;
  scroll-behavior: smooth;
}
.messages::-webkit-scrollbar { width: 8px; }
.messages::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 2px; }

.msg { display: grid; grid-template-columns: 74px 1fr; gap: 14px; animation: fade 220ms ease-out; }
@keyframes fade { from { opacity: 0; transform: translateY(4px);} to { opacity: 1; transform: none; } }
.msg .role {
  font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim); padding-top: 4px;
}
.msg.user .role { color: var(--user); }
.msg.assistant .role { color: var(--accent-2); }
.msg.system .role { color: var(--amber); }
.msg.error .role { color: var(--danger); }
.msg .bubble {
  background: var(--panel-2);
  border: 1px solid var(--line);
  padding: 12px 14px;
  border-radius: 4px;
  white-space: pre-wrap;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  font-size: 13.5px;
}
.msg.user .bubble { border-color: #22415a; background: #0f1e2b; }
.msg.assistant .bubble { border-color: #3a2418; background: #1a120c; }
.msg.error .bubble { border-color: #6b1f1f; background: #240c0c; color: #ffb3b3; }
.bubble .cursor {
  display: inline-block;
  width: 8px; height: 14px;
  background: var(--accent-2);
  margin-left: 2px;
  vertical-align: -2px;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.bubble pre {
  background: #06090c;
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 3px;
  overflow-x: auto;
  font-size: 12.5px;
  margin: 8px 0;
}
.bubble code { font-family: var(--mono); }

.composer {
  display: grid; grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  background: rgba(9, 12, 16, 0.8);
}
.composer textarea {
  resize: none;
  width: 100%;
  max-height: 160px;
  padding: 12px 14px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.5;
  outline: none;
  transition: border-color 120ms;
}
.composer textarea:focus { border-color: var(--accent); }
.composer textarea:disabled { opacity: 0.5; }

.footer-row {
  display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between;
  gap: 20px;
  padding: 12px 16px 14px;
  border-top: 1px dashed var(--line);
  background: rgba(9, 12, 16, 0.6);
}

.settings { flex: 1 1 340px; }
.settings summary {
  cursor: pointer; color: var(--text-dim); font-size: 12px;
  padding: 4px 0; user-select: none;
  list-style: none;
}
.settings summary::before { content: "▸ "; color: var(--accent-2); }
.settings[open] summary::before { content: "▾ "; }
.settings summary:hover { color: var(--accent-2); }
.settings .grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px;
  margin-top: 10px;
}
.settings label {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.1em;
}
.settings label:first-child { grid-column: 1 / -1; }
.settings textarea, .settings input[type="range"] {
  font-family: var(--mono);
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 10px;
  font-size: 12.5px;
  outline: none;
}
.settings input[type="range"] { padding: 6px 0; accent-color: var(--accent); }
.settings output {
  font-family: var(--mono); font-size: 11px; color: var(--accent-2);
  margin-left: 6px;
}

.examples { flex: 1 1 280px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.examples-label { color: var(--text-dim); font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em; margin-right: 4px; }
.chip {
  cursor: pointer;
  padding: 5px 10px;
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-dim);
  transition: all 120ms;
  max-width: 260px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.chip:hover { border-color: var(--accent-2); color: var(--accent-2); }

.status {
  padding: 8px 16px;
  min-height: 20px;
  font-size: 11px;
  color: var(--text-dim);
  border-top: 1px solid var(--line);
  background: rgba(6, 9, 12, 0.9);
}
.status.error { color: var(--danger); }
.status.ok { color: var(--green); }

.meta {
  margin-top: 22px;
  display: flex; flex-wrap: wrap; gap: 8px 24px;
  color: var(--text-dim); font-size: 11.5px;
}
.meta a { color: var(--text); text-decoration: none; border-bottom: 1px dotted var(--line-2); }
.meta a:hover { color: var(--accent-2); border-color: var(--accent-2); }
.mono { color: var(--text); font-family: var(--mono); }

@media (max-width: 720px) {
  .topbar { padding: 12px 16px; }
  main { padding: 20px 14px 60px; }
  .msg { grid-template-columns: 60px 1fr; }
  .settings .grid { grid-template-columns: 1fr; }
}