/* Design Aiko : jetons de couleur repris du CSS des apps (apps/www). Clair par defaut, sombre auto. */
:root {
  --background: 0 0% 100%;
  --foreground: 0 0% 9%;
  --primary: 217 91% 55%;
  --primary-foreground: 0 0% 100%;
  --accent: 0 0% 96%;
  --border: 0 0% 90%;
  --muted: 0 0% 45%;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: 0 0% 0%;
    --foreground: 0 0% 98%;
    --primary: 217 91% 60%;
    --accent: 0 0% 10%;
    --border: 0 0% 18%;
    --muted: 0 0% 60%;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.app { display: flex; flex-direction: column; height: 100dvh; max-width: 820px; margin: 0 auto; }

.topbar {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-bottom: 1px solid hsl(var(--border));
}
.logo { height: 28px; width: auto; }
.product { font-weight: 600; color: hsl(var(--muted)); }
.logout { margin-left: auto; background: none; border: 1px solid hsl(var(--border)); color: inherit;
  border-radius: 999px; padding: 6px 12px; cursor: pointer; font-size: 14px; }
.logout:hover { background: hsl(var(--accent)); }

/* Connexion */
.login { display: flex; align-items: center; justify-content: center; flex: 1; padding: 16px; }
.login-card { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 12px;
  border: 1px solid hsl(var(--border)); border-radius: var(--radius); padding: 24px; }
.login-card h1 { margin: 0; font-size: 22px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }
.login-card input {
  padding: 10px 12px; border: 1px solid hsl(var(--border)); border-radius: 8px;
  background: hsl(var(--background)); color: inherit; font-size: 16px;
}
.muted { color: hsl(var(--muted)); margin: 0; font-size: 14px; }
.error { color: #b4232a; font-size: 14px; margin: 0; }

button[type="submit"], .send {
  background: hsl(var(--primary)); color: hsl(var(--primary-foreground));
  border: none; border-radius: 8px; padding: 10px 16px; font-size: 16px; cursor: pointer;
}
button[type="submit"]:disabled { opacity: .6; cursor: default; }

/* Chat */
.chat { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 85%; padding: 10px 14px; border-radius: var(--radius); white-space: pre-wrap; word-wrap: break-word; }
.msg.user { align-self: flex-end; background: hsl(var(--primary)); color: hsl(var(--primary-foreground)); }
.msg.assistant { align-self: flex-start; background: hsl(var(--accent)); }
.composer { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid hsl(var(--border)); }
.composer textarea {
  flex: 1; resize: none; max-height: 160px; padding: 10px 12px; font: inherit;
  border: 1px solid hsl(var(--border)); border-radius: 8px; background: hsl(var(--background)); color: inherit;
}