:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --surface-2: #eef1ed;
  --border: #dde2dc;
  --text: #1c2420;
  --muted: #5f6b64;
  --accent: #157a4a;
  --accent-ink: #ffffff;
  --accent-soft: #e2f2e9;
  --user: #e8eef9;
  --user-ink: #1d2c4a;
  --warn-bg: #fff6e0;
  --warn-border: #f0d48a;
  --warn-ink: #6b4d00;
  --del: #b3261e;
  --ins: #157a4a;
  --danger: #b3261e;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 4px 16px rgb(0 0 0 / 0.04);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111513;
    --surface: #181d1a;
    --surface-2: #212823;
    --border: #2d3530;
    --text: #e6ebe7;
    --muted: #99a59e;
    --accent: #3fb57a;
    --accent-ink: #08130d;
    --accent-soft: #1b3226;
    --user: #1f2a3d;
    --user-ink: #dce6fb;
    --warn-bg: #2e2612;
    --warn-border: #5c4a1c;
    --warn-ink: #f2d78d;
    --del: #ff8a80;
    --ins: #6fdc9f;
    --danger: #ff8a80;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
}
h1, h2 { margin: 0; }
h2 { font-size: 1rem; }
button, select, textarea, input { font: inherit; color: inherit; }
.muted { color: var(--muted); }
.ga { font-family: Georgia, "Iowan Old Style", serif; }

/* Top bar */
.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 26px; color: var(--accent); }
.brand h1 { font-size: 1.05rem; line-height: 1.1; }
.sub { margin: 0; font-size: 0.8rem; color: var(--muted); }
.tabs { display: flex; gap: 4px; flex: 1; }
.tabs button {
  border: 0; background: none; padding: 8px 12px; border-radius: 8px;
  color: var(--muted); cursor: pointer; font-weight: 500;
}
.tabs button:hover { background: var(--surface-2); color: var(--text); }
.tabs button[aria-selected="true"] { background: var(--accent-soft); color: var(--accent); }
.status { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--muted); white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.status.ok .dot { background: var(--accent); }
.status.err .dot { background: var(--danger); }

/* Layout */
.layout { flex: 1; display: grid; grid-template-columns: 280px 1fr; min-height: 0; }
.settings {
  padding: 20px; border-right: 1px solid var(--border);
  background: var(--surface); overflow-y: auto;
  display: flex; flex-direction: column; gap: 14px;
}
.field { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--muted); }
.field span { display: flex; justify-content: space-between; }
.field output { color: var(--text); font-variant-numeric: tabular-nums; }
select, textarea, input[type="text"] {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border);
  border-radius: 10px; background: var(--surface); color: var(--text);
}
input[type="range"] { accent-color: var(--accent); }
.check { display: flex; gap: 8px; align-items: center; font-size: 0.9rem; }
.check input { accent-color: var(--accent); }
.facts { margin: 8px 0 0; font-size: 0.8rem; display: grid; grid-template-columns: auto 1fr; gap: 4px 10px; color: var(--muted); }
.facts dd { margin: 0; color: var(--text); word-break: break-word; }

main { min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.panel { flex: 1; min-height: 0; padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; }
.panel[hidden] { display: none; }

/* Buttons */
button { cursor: pointer; }
.primary, .row button, .file-btn, .ghost {
  border: 1px solid var(--border); background: var(--surface);
  padding: 8px 14px; border-radius: 10px; font-weight: 500;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.primary:hover { filter: brightness(1.08); }
.panel p { margin: 0; }
del { color: var(--del); }
ins { color: var(--ins); text-decoration: none; font-weight: 600; }
.ghost { background: transparent; }
button:disabled { opacity: 0.45; cursor: not-allowed; }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.file-btn { cursor: pointer; display: inline-flex; align-items: center; }
.file-btn input { display: none; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--border); background: var(--surface); border-radius: 999px;
  padding: 4px 10px; font-size: 0.85rem; cursor: pointer;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }

/* Chat */
.chat { padding: 0; gap: 0; }
.toolbar { display: flex; align-items: center; gap: 8px; padding: 10px 20px; border-bottom: 1px solid var(--border); background: var(--surface); }
.spacer { flex: 1; }
.messages { list-style: none; margin: 0; padding: 20px; flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 14px; }
.empty { margin: auto; text-align: center; color: var(--muted); max-width: 440px; }
.empty .ga { font-size: 2rem; color: var(--text); margin: 0 0 4px; }

.msg { max-width: min(680px, 88%); display: flex; flex-direction: column; gap: 6px; }
.msg.user { align-self: flex-end; align-items: flex-end; }
.msg.tutor { align-self: flex-start; }
.bubble { padding: 10px 14px; border-radius: var(--radius); box-shadow: var(--shadow); white-space: pre-wrap; }
.user .bubble { background: var(--user); color: var(--user-ink); border-bottom-right-radius: 4px; }
.tutor .bubble { background: var(--surface); border: 1px solid var(--border); border-bottom-left-radius: 4px; font-size: 1.05rem; }
.tutor .bubble { display: flex; flex-direction: column; gap: 8px; }
.seg { margin: 0; }
.seg-de { color: var(--text); }
.seg-ga { background: var(--accent-soft); border-radius: 10px; padding: 8px 12px; }
.seg-ga .ga { margin: 0; font-size: 1.15rem; font-weight: 600; color: var(--text); }
.seg-ga .trans { margin: 4px 0 0; font-size: 0.88rem; color: var(--muted); font-style: italic; }
.seg-ga .trans::before { content: "🇩🇪 "; font-style: normal; }
.bubble.streaming::after { content: "▍"; color: var(--accent); animation: pulse 1s infinite; margin-left: 1px; }
.msg-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 0.78rem; color: var(--muted); }
.tag { background: var(--surface-2); border-radius: 6px; padding: 1px 6px; font-variant-numeric: tabular-nums; }
.icon-btn {
  border: 1px solid var(--border); background: var(--surface); border-radius: 999px;
  padding: 2px 10px; font-size: 0.8rem; display: inline-flex; gap: 4px; align-items: center;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

.correction {
  max-width: min(680px, 88%); align-self: flex-end;
  background: var(--warn-bg); border: 1px solid var(--warn-border); color: var(--warn-ink);
  border-radius: 12px; padding: 8px 12px; font-size: 0.9rem;
}
.correction .fixed { font-family: Georgia, serif; font-size: 1rem; margin: 2px 0 4px; }
.correction .label { font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; }

.thinking { align-self: flex-start; color: var(--muted); display: flex; gap: 8px; align-items: center; }
.spinner { width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.debug { font-size: 0.78rem; }
.debug summary { cursor: pointer; color: var(--muted); }
.debug pre { margin: 6px 0 0; max-height: 260px; overflow: auto; background: var(--surface-2); padding: 8px; border-radius: 8px; }
body:not(.show-debug) .debug { display: none; }

.error-msg { align-self: center; color: var(--danger); background: var(--surface); border: 1px solid var(--danger); border-radius: 10px; padding: 8px 12px; font-size: 0.9rem; max-width: 88%; }

/* Composer */
.composer { display: flex; gap: 10px; align-items: flex-end; padding: 12px 20px 16px; border-top: 1px solid var(--border); background: var(--surface); }
.input-wrap { flex: 1; position: relative; }
.composer textarea { resize: none; max-height: 160px; padding: 10px 12px; }
.rec-info { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--danger); margin-top: 4px; }
.rec-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--danger); animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: 0.3; } }
.mic {
  position: relative; width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); display: grid; place-items: center; flex-shrink: 0; overflow: hidden;
}
.mic svg { width: 22px; height: 22px; fill: currentColor; position: relative; z-index: 1; }
.mic .level { position: absolute; inset: auto 0 0 0; height: 0; background: var(--accent-soft); transition: height 60ms; }
.mic.recording { border-color: var(--danger); color: var(--danger); }
.composer .primary { height: 44px; }

/* Results (TTS/ASR) */
.results { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.results li { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.results .title { font-weight: 600; min-width: 140px; }
.results .text { flex-basis: 100%; font-family: Georgia, serif; }
.results .err { color: var(--danger); flex-basis: 100%; }
.results .alt { flex-basis: 100%; font-size: 0.8rem; }
.score { font-weight: 600; }
.score.good { color: var(--ins); }
.score.bad { color: var(--del); }

.prompt { white-space: pre-wrap; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px; font-size: 0.85rem; margin: 0; }

/* Log */
.log { background: var(--surface); border-top: 1px solid var(--border); font-size: 0.8rem; max-height: 35vh; overflow: auto; }
.log summary { padding: 6px 20px; cursor: pointer; color: var(--muted); position: sticky; top: 0; background: var(--surface); }
.badge { background: var(--surface-2); border-radius: 999px; padding: 0 7px; margin-left: 4px; }
.log table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.log th, .log td { text-align: left; padding: 3px 20px; border-top: 1px solid var(--border); }
.log td.err { color: var(--danger); }

.toast {
  position: fixed; bottom: 60px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 8px 14px; border-radius: 10px; font-size: 0.9rem; max-width: calc(100% - 32px);
}

.settings-toggle { display: none; border: 1px solid var(--border); background: var(--surface); border-radius: 10px; padding: 6px 10px; }

/* Schmal */
@media (max-width: 820px) {
  .topbar { flex-wrap: wrap; gap: 8px 12px; padding: 10px 16px; }
  .status { margin-left: auto; }
  .settings-toggle { display: inline-flex; }
  .tabs { order: 3; flex-basis: 100%; overflow-x: auto; }
  .tabs button { white-space: nowrap; }
  .layout { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .settings { display: none; border-right: 0; border-bottom: 1px solid var(--border); padding: 12px 16px; grid-template-columns: 1fr 1fr; gap: 10px; max-height: 50vh; }
  body.settings-open .settings { display: grid; }
  .settings h2, .facts, .check { grid-column: 1 / -1; }
  .turn-long { display: none; }
  .messages, .panel { padding: 16px; }
  .toolbar, .composer { padding-left: 16px; padding-right: 16px; }
  .msg, .correction { max-width: 94%; }
}