:root {
  --bg: #0b0b0d;
  --bg-2: #141418;
  --bg-3: #1c1c22;
  --line: #262630;
  --text: #ebe6d9;
  --muted: #8a8579;
  --accent: #c79a3f;
  --accent-2: #8a6a24;
  --danger: #d86c6c;
  --ok: #74c58a;
  --dad-bubble: #1c1a16;
  --user-bubble: #2a2730;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Georgia", "Charter", serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  background:
    radial-gradient(1100px 500px at 15% 0%, rgba(199, 154, 63, 0.08), transparent 60%),
    radial-gradient(800px 600px at 100% 100%, rgba(199, 154, 63, 0.04), transparent 60%),
    var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.app {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  width: 100%;
  max-width: 1200px;
  min-height: 100vh;
  background: var(--bg-2);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

/* ── dad sidebar ── */
.dad {
  padding: 28px 24px;
  background: linear-gradient(180deg, #0f0e10 0%, #15141a 100%);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: sticky;
  top: 0;
  max-height: 100vh;
}

.silhouette {
  width: 180px;
  height: 234px;
  background: var(--bg-3);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  filter: grayscale(0.2) sepia(0.15);
}
.silhouette svg { width: 100%; height: 100%; display: block; }

.brand {
  margin: 18px 0 4px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 34px;
  letter-spacing: 0.5px;
  color: var(--accent);
  text-shadow: 0 2px 0 rgba(0,0,0,0.3);
}
.tagline {
  margin: 0 0 20px;
  color: var(--muted);
  font-style: italic;
  font-size: 14px;
}

.traits {
  list-style: none;
  padding: 0;
  margin: 0 0 auto;
  color: var(--text);
  font-size: 13px;
  line-height: 1.8;
}
.traits li::before {
  content: "— ";
  color: var(--accent-2);
}

.footer-note {
  margin: 18px 0 0;
  font-size: 11px;
  color: var(--muted);
}
.footer-note a { color: var(--accent); text-decoration: none; }
.footer-note a:hover { text-decoration: underline; }

/* ── chat ── */
.chat {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--bg-2);
}
.chat > .messages { flex: 1 1 0; min-height: 0; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(0,0,0,0.2);
}

.status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 6px currentColor;
}
.dot.thinking { background: var(--accent); animation: pulse 1.4s ease-in-out infinite; }
.dot.error { background: var(--danger); }
.dot.ok { background: var(--ok); }

@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.15); }
}

.auth-actions { display: flex; gap: 8px; align-items: center; }

.login-btn {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent-2);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 12px;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.15s;
  text-transform: lowercase;
  font-family: inherit;
}
.login-btn:hover:not(:disabled) { background: rgba(199,154,63,0.08); }
.login-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.login-btn.ghost-btn {
  color: var(--muted);
  border-color: var(--line);
}
.login-btn.ghost-btn:hover { color: var(--text); border-color: var(--accent-2); }

.notice {
  margin: 0;
  padding: 10px 18px;
  font-size: 12px;
  line-height: 1.4;
  background: rgba(199, 154, 63, 0.06);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.notice.ok { background: rgba(116, 197, 138, 0.08); color: var(--ok); }
.notice.warn { background: rgba(199, 154, 63, 0.10); color: var(--accent); }
.notice.error { background: rgba(216, 108, 108, 0.10); color: var(--danger); }

/* messages */
.messages {
  overflow-y: auto;
  padding: 24px 22px 12px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}
.messages::-webkit-scrollbar { width: 8px; }
.messages::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }

.msg {
  display: flex;
  gap: 10px;
  max-width: 85%;
  align-items: flex-end;
}
.msg .avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--bg-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  border: 1px solid var(--line);
  flex-shrink: 0;
}
.msg .bubble {
  padding: 12px 16px;
  border-radius: var(--radius);
  line-height: 1.55;
  font-size: 15px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.msg .bubble p { margin: 0; white-space: pre-wrap; word-wrap: break-word; }

.dad-msg { align-self: flex-start; }
.dad-msg .bubble {
  background: var(--dad-bubble);
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
  color: var(--text);
}
.user-msg { align-self: flex-end; flex-direction: row-reverse; }
.user-msg .bubble {
  background: var(--user-bubble);
  border: 1px solid var(--line);
  border-bottom-right-radius: 4px;
}

/* composer */
.composer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 18px 18px;
  border-top: 1px solid var(--line);
  background: rgba(0,0,0,0.2);
}
.composer textarea {
  width: 100%;
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 15px;
  resize: none;
  outline: none;
  transition: border-color 0.15s;
  min-height: 44px;
  max-height: 160px;
  box-sizing: border-box;
}
.composer textarea:focus { border-color: var(--accent-2); }

.composer button {
  width: 100%;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #1a1406;
  border: none;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  letter-spacing: 0.5px;
  transition: filter 0.15s;
  text-transform: lowercase;
}
.composer button:hover:not(:disabled) { filter: brightness(1.08); }
.composer button:disabled { opacity: 0.5; cursor: not-allowed; }

/* responsive */
@media (max-width: 760px) {
  .app { grid-template-columns: 1fr; }
  .dad {
    padding: 18px 16px 14px;
    position: static;
    max-height: none;
    flex-direction: row;
    gap: 16px;
    text-align: left;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
  .silhouette { width: 90px; height: 117px; flex-shrink: 0; }
  .brand { font-size: 24px; margin: 0; }
  .tagline { margin: 2px 0 0; font-size: 12px; }
  .traits { display: none; }
  .footer-note { display: none; }
  .chat { height: auto; min-height: calc(100vh - 140px); }
}