:root {
  --accent: #c8102e;
  --accent-ink: #ffffff;
  --bg: #f7f7f5;
  --panel: #ffffff;
  --ink: #1d1d1b;
  --muted: #6b6b66;
  --line: #e4e3df;
  --bubble: #efeeea;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a19;
    --panel: #232321;
    --ink: #ecebe7;
    --muted: #a3a29c;
    --line: #34332f;
    --bubble: #2e2d2a;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 var(--font); }
[hidden] { display: none !important; }
button { font: inherit; cursor: pointer; }
.muted { color: var(--muted); }
.error { color: #c0392b; min-height: 1.2em; margin: 8px 0 0; }

.logo-mark { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 22px; }
.logo-mark.small { width: 28px; height: 28px; font-size: 15px; border-radius: 8px; }
.logo-mark.big { width: 56px; height: 56px; font-size: 28px; margin: 0 auto 12px; }

/* Anmeldung */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(380px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; gap: 8px; }
.login-card h1 { margin: 8px 0 0; font-size: 22px; }
.login-card p { margin: 0 0 12px; }
.login-card input { padding: 11px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); font: inherit; }
.login-card button { margin-top: 8px; padding: 11px; border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-ink); font-weight: 600; }

/* Chat-Layout */
.app { height: 100%; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--panel); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.badge { font-size: 12px; font-weight: 500; padding: 2px 8px; border-radius: 999px; background: #fff3cd; color: #7a5a00; }
.top-actions { display: flex; gap: 6px; }
.ghost { border: 1px solid var(--line); background: transparent; color: var(--ink); border-radius: 9px; padding: 6px 10px; font-size: 14px; }
.ghost:hover { background: var(--bubble); }
.brand, .ghost { white-space: nowrap; }
.brand { min-width: 0; overflow: hidden; }
.top-actions { flex-shrink: 0; }
@media (max-width: 420px) { .badge { display: none; } }
@media (max-width: 480px) {
  .topbar { padding: 8px 12px; }
  .brand { gap: 8px; font-size: 14px; }
  .ghost { padding: 5px 8px; font-size: 13px; }
  .welcome { padding-top: 3vh; }
}

.messages { flex: 1; overflow-y: auto; padding: 24px 16px 8px; }
.messages > * { max-width: 780px; margin-left: auto; margin-right: auto; }
.welcome { text-align: center; padding: 6vh 0 16px; }
.welcome h2 { margin: 0 0 6px; font-size: 26px; font-weight: 600; }
.welcome p { max-width: 520px; margin: 0 auto 20px; }
.examples { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 10px; text-align: left; }
.example { border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 12px; padding: 12px 14px; text-align: left; }
.example:hover { border-color: var(--accent); }

.msg { display: flex; gap: 12px; margin-bottom: 22px; }
.msg.user { justify-content: flex-end; }
.msg.user .body { background: var(--bubble); border-radius: 18px; padding: 10px 14px; max-width: 85%; white-space: pre-wrap; }
.msg.bot .avatar { flex: 0 0 auto; }
.msg.bot .body { flex: 1; min-width: 0; padding-top: 2px; }
.body p { margin: 0 0 10px; }
.body ul, .body ol { margin: 0 0 10px; padding-left: 22px; }
.body li { margin: 2px 0; }
.body a { color: var(--accent); }
.body code { background: var(--bubble); padding: 1px 5px; border-radius: 5px; font-size: 13px; }
.body table { border-collapse: collapse; margin: 0 0 10px; display: block; overflow-x: auto; }
.body th, .body td { border: 1px solid var(--line); padding: 4px 8px; text-align: left; }

.steps { list-style: none; margin: 0 0 10px; padding: 0; font-size: 13px; color: var(--muted); }
.steps li { display: flex; align-items: center; gap: 8px; margin: 3px 0; }
.steps li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--muted); flex: 0 0 auto; }
details.trace { margin: 0 0 10px; font-size: 13px; color: var(--muted); }
details.trace summary { cursor: pointer; }
.thinking { display: inline-flex; gap: 4px; padding: 6px 0; }
.thinking span { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite ease-in-out; }
.thinking span:nth-child(2) { animation-delay: .15s; }
.thinking span:nth-child(3) { animation-delay: .3s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .thinking span { animation: none; opacity: .6; } }
.msg-actions { display: flex; gap: 6px; margin-top: 4px; }
.msg-actions button { border: 0; background: transparent; color: var(--muted); font-size: 13px; padding: 2px 4px; border-radius: 6px; }
.msg-actions button:hover { background: var(--bubble); color: var(--ink); }

/* Eingabe */
.composer-wrap { padding: 8px 16px 14px; background: linear-gradient(to top, var(--bg) 70%, transparent); }
.composer { max-width: 780px; margin: 0 auto; display: flex; align-items: flex-end; gap: 8px; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 8px 8px 8px 14px; box-shadow: 0 2px 10px rgba(0,0,0,.04); }
.composer:focus-within { border-color: var(--accent); }
.composer textarea { flex: 1; border: 0; outline: 0; resize: none; background: transparent; color: var(--ink); font: inherit; max-height: 200px; padding: 6px 0; }
#send { flex: 0 0 auto; width: 38px; height: 38px; border: 0; border-radius: 11px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; }
#send:disabled { opacity: .4; cursor: default; }
.hint { max-width: 780px; margin: 6px auto 0; text-align: center; font-size: 12px; color: var(--muted); }