:root {
  --bg: #0e1014;
  --panel: #161a21;
  --panel-2: #1d222b;
  --text: #e7ecf3;
  --muted: #8a93a3;
  --accent: #6cb1ff;
  --chris: #2d8b5b;
  --user: #2c3140;
  --border: #242a35;
  --danger: #ff7676;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
}

body {
  display: flex;
  flex-direction: column;
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
  height: 100vh;
}

header {
  flex: 0 0 auto;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 12px;
}

header .title {
  display: flex;
  align-items: center;
  gap: 8px;
}

header h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

header .sub {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--chris);
  box-shadow: 0 0 6px rgba(45, 139, 91, 0.6);
}

main {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 8px 4px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.row { display: flex; flex-direction: column; gap: 4px; }
.row-user { align-items: flex-end; }
.row-chris { align-items: flex-start; }

.tools {
  display: flex;
  gap: 4px;
  padding-left: 4px;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.row-chris:hover .tools { opacity: 1; }

.fb-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  width: 26px;
  height: 24px;
  border-radius: 6px;
  font-size: 13px;
  padding: 0;
  cursor: pointer;
}
.fb-btn:hover { color: var(--text); border-color: var(--accent); }
.fb-btn.active { color: var(--accent); border-color: var(--accent); }
.fb-btn:disabled { cursor: default; }

.debug-block {
  display: none;
  background: rgba(108, 177, 255, 0.05);
  border: 1px dashed rgba(108, 177, 255, 0.25);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 11.5px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
body.debug .debug-block { display: block; }
.debug-header { color: var(--accent); margin-bottom: 4px; font-weight: 600; }
.debug-line { white-space: pre-wrap; word-break: break-word; line-height: 1.4; }

.msg {
  max-width: 82%;
  padding: 9px 12px;
  border-radius: 14px;
  line-height: 1.45;
  font-size: 14.5px;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.msg.user {
  align-self: flex-end;
  background: var(--user);
  border: 1px solid var(--border);
  border-bottom-right-radius: 4px;
}

.msg.chris {
  align-self: flex-start;
  background: var(--panel);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.msg.system {
  align-self: center;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-style: italic;
  max-width: 100%;
  text-align: center;
}

.msg.error {
  align-self: center;
  color: var(--danger);
  font-size: 13px;
  border: 1px dashed var(--danger);
  background: rgba(255, 118, 118, 0.06);
}

.cursor {
  display: inline-block;
  width: 7px;
  height: 1em;
  vertical-align: -2px;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

#composer {
  flex: 0 0 auto;
  display: flex;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

#input {
  flex: 1;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14.5px;
  font-family: inherit;
  resize: none;
  max-height: 160px;
  outline: none;
}
#input:focus { border-color: var(--accent); }

button {
  background: var(--accent);
  color: #0b1320;
  border: none;
  border-radius: 10px;
  padding: 0 14px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: not-allowed; }

button#reset {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  font-weight: 500;
}
button#reset:hover { color: var(--text); }

footer {
  font-size: 11px;
  color: var(--muted);
  padding-top: 6px;
  min-height: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#debug-toggle {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
}
#debug-toggle:hover { color: var(--text); }

#status.err { color: var(--danger); }