/* ============================================================
   PC Giga AI – Web-UI (pcg-core v0.2)
   - Helles + dunkles Theme: prefers-color-scheme UND manueller
     Toggle via data-theme auf <html> (Wahl in localStorage).
   - Kontraste >= 4.5:1, Touch-Ziele >= 44px, einspaltig/responsiv.
   ============================================================ */

/* ---------- Design-Tokens: helles Theme (Default) ---------- */
:root {
  --bg: #eef0f4;
  --surface: #ffffff;
  --text: #17181c;          /* auf --surface ~15:1 */
  --text-muted: #565b66;    /* auf --surface ~6.9:1 */
  --border: #d5d8de;
  --accent: #0b57d0;        /* mit weißem Text ~6.9:1 */
  --accent-text: #ffffff;
  --focus: #0b57d0;
  --chip-bg: #e6e9ee;
  --chip-text: #363b45;
  --danger: #b3261e;        /* Fehlertext auf hellem Grund */
  --danger-solid: #b3261e;  /* Stopp-Button-Hintergrund (weißer Text ~6.6:1) */
  --warn-bg: #fff3cd;
  --warn-text: #664d03;     /* auf --warn-bg ~7.3:1 */
  --code-bg: #eceef2;
  --shadow: 0 4px 16px rgb(0 0 0 / 0.18);
}

/* ---------- Dunkles Theme (System-Präferenz, solange kein manuelles hell) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131417;
    --surface: #1e2024;
    --text: #e9eaec;
    --text-muted: #a6aab2;
    --border: #3a3d45;
    --accent: #0b57d0;
    --accent-text: #ffffff;
    --focus: #8ab4f8;
    --chip-bg: #2c2f36;
    --chip-text: #ced1d7;
    --danger: #f2b8b5;
    --danger-solid: #b3261e;
    --warn-bg: #3b2f04;
    --warn-text: #ffdf8a;
    --code-bg: #26282e;
    --shadow: 0 4px 16px rgb(0 0 0 / 0.5);
  }
}

/* ---------- Dunkles Theme (manueller Toggle gewinnt) ---------- */
:root[data-theme="dark"] {
  --bg: #131417;
  --surface: #1e2024;
  --text: #e9eaec;
  --text-muted: #a6aab2;
  --border: #3a3d45;
  --accent: #0b57d0;
  --accent-text: #ffffff;
  --focus: #8ab4f8;
  --chip-bg: #2c2f36;
  --chip-text: #ced1d7;
  --danger: #f2b8b5;
  --danger-solid: #b3261e;
  --warn-bg: #3b2f04;
  --warn-text: #ffdf8a;
  --code-bg: #26282e;
  --shadow: 0 4px 16px rgb(0 0 0 / 0.5);
}

/* ---------- Basis ---------- */
* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { height: 100%; }

body {
  margin: 0;
  height: 100dvh;               /* mobile Browser-Leisten korrekt berücksichtigen */
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.noscript { padding: 1rem; text-align: center; }

/* ---------- Header ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.app-header h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ---------- Buttons & Formularelemente (Touch-Ziele >= 44px) ---------- */
.btn {
  min-height: 44px;
  min-width: 44px;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn.icon-btn { padding: 0.4rem; font-size: 1.2rem; line-height: 1; }

.btn.primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: transparent;
}

.btn.danger {
  background: var(--danger-solid);
  color: #ffffff;
  border-color: transparent;
}

/* Mikro-Zustände */
#mic-btn.listening {
  background: var(--danger-solid);
  color: #ffffff;
  border-color: transparent;
  animation: pulse 1.4s ease-in-out infinite;
}

#mic-btn.speaking { border-color: var(--focus); }

#funk-btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-text);
  border-color: transparent;
}

select {
  min-height: 44px;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

/* ---------- Banner & Status ---------- */
.banner {
  padding: 0.6rem 1rem;
  background: var(--warn-bg);
  color: var(--warn-text);
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  text-align: center;
}

.status {
  padding: 0.35rem 1rem;
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-muted);
}

.status[data-kind="error"] { color: var(--danger); }

/* ---------- Gesprächsverlauf ---------- */
#chat-log {
  flex: 1 1 auto;
  overflow-y: auto;
  width: 100%;
  max-width: 56rem;
  margin-inline: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.msg {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.msg.user { align-items: flex-end; }

.bubble {
  max-width: min(85%, 42rem);
  padding: 0.6rem 0.9rem;
  border-radius: 1rem;
}

.msg.user .bubble {
  background: var(--accent);
  color: var(--accent-text);
  border-bottom-right-radius: 0.25rem;
}

.msg.assistant .bubble {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-left-radius: 0.25rem;
}

.content {
  white-space: pre-wrap;        /* Zeilenumbrüche aus dem Modelltext erhalten */
  overflow-wrap: anywhere;
}

.content pre {
  margin: 0.4rem 0;
  padding: 0.6rem;
  background: var(--code-bg);
  border-radius: 0.5rem;
  overflow-x: auto;             /* breiter Code scrollt in der Bubble, nie die Seite */
  white-space: pre;
}

code { font-family: ui-monospace, "Cascadia Mono", "Source Code Pro", monospace; font-size: 0.9em; }

/* Tool-Chips in der Assistant-Bubble */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.4rem;
}

.chip {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--chip-text);
  font-size: 0.78rem;
}

.chip.running { animation: chip-pulse 1.2s ease-in-out infinite; }
.chip.error { color: var(--danger); }

/* Vorlese-Button unter einer Assistant-Nachricht */
.speak-btn {
  min-height: 44px;
  min-width: 44px;
  margin-top: 0.15rem;
  padding: 0.2rem;
  border: none;
  border-radius: 0.5rem;
  background: transparent;
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
}

.usage {
  margin-top: 0.2rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.system-line {
  align-self: center;
  padding: 0.25rem 0.5rem;
  color: var(--danger);
  font-size: 0.85rem;
  text-align: center;
}

/* ---------- Eingabezeile (sticky unten via Flex-Layout) ---------- */
.composer {
  position: sticky;
  bottom: 0;
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  flex-wrap: wrap;
  width: 100%;
  max-width: 56rem;
  margin-inline: auto;
  padding: 0.6rem 1rem calc(0.6rem + env(safe-area-inset-bottom));
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.composer textarea {
  flex: 1 1 14rem;
  min-height: 44px;
  max-height: 10rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  resize: none;
}

.composer textarea::placeholder { color: var(--text-muted); }

.composer-buttons {
  display: flex;
  gap: 0.4rem;
  align-items: flex-end;
}

/* ---------- Stimm-Popover ---------- */
.popover {
  position: fixed;
  right: 1rem;
  bottom: 5.5rem;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-width: min(20rem, calc(100vw - 2rem));
  padding: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
}

/* ---------- Token-Modal ---------- */
dialog {
  width: calc(100% - 2rem);
  max-width: 26rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--surface);
  color: var(--text);
}

dialog::backdrop { background: rgb(0 0 0 / 0.55); }

dialog h2 { margin: 0 0 0.5rem; font-size: 1.1rem; }
dialog p { margin: 0.25rem 0 0.75rem; font-size: 0.9rem; }

dialog input {
  width: 100%;
  min-height: 44px;
  margin-bottom: 0.75rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.error-text { color: var(--danger); font-size: 0.85rem; }

/* ---------- Animationen ---------- */
@keyframes chip-pulse { 50% { opacity: 0.55; } }
@keyframes pulse { 50% { opacity: 0.75; } }

/* Bewegungs-Reduktion respektieren */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Kleine Bildschirme ---------- */
@media (max-width: 480px) {
  .app-header h1 { font-size: 1rem; }
  .bubble { max-width: 92%; }
  #send-btn { padding-inline: 0.6rem; }
}
