/* ===============================================================
   Oberfläche — Bedienleiste, Arbeitsfläche, Menü, Statuszeile.

   Nur die Hülle des Viewers. Die Farbtokens stammen aus document.css,
   dieses Blatt wandert nicht in die Ausgabe.
   =============================================================== */

/* --- Grundgerüst -------------------------------------------------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--canvas);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}
:focus-visible { outline: 2px solid var(--accent-fg); outline-offset: -1px; border-radius: 6px; }

/* --- Kopfzeile ---------------------------------------------------- */
.topbar {
  flex: none;
  display: flex; align-items: center; gap: 8px;
  height: 48px; padding: 0 12px;
  background: var(--canvas-subtle);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; margin-right: 4px; }
.brand svg { fill: var(--fg); }
.doc-name {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px; color: var(--fg-muted);
  max-width: 24ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.spacer { flex: 1; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  height: 28px; padding: 0 10px;
  font: inherit; font-size: 12px; font-weight: 500;
  color: var(--fg); background: var(--btn-bg);
  border: 1px solid var(--border); border-radius: 6px;
  box-shadow: var(--shadow); cursor: pointer;
  transition: background .12s;
}
.btn:hover { background: var(--btn-hover); }
.btn:active { transform: translateY(.5px); }
.btn svg { fill: var(--fg-muted); }
.btn.icon-only { padding: 0 7px; }

/* Segmentierte Ansichtsumschaltung (GitHub „Write / Preview“) */
.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.segmented button {
  height: 28px; padding: 0 10px; font: inherit; font-size: 12px; font-weight: 500;
  color: var(--fg-muted); background: var(--btn-bg);
  border: 0; border-left: 1px solid var(--border); cursor: pointer;
}
.segmented button:first-child { border-left: 0; }
.segmented button[aria-pressed="true"] { background: var(--canvas); color: var(--fg); font-weight: 600; }

/* --- Menü der Ausgabeformate -------------------------------------- */
.menu-wrap { position: relative; }
.menu-wrap .caret { fill: var(--fg-muted); margin-left: -2px; }
.menu {
  position: absolute; right: 0; top: calc(100% + 4px); z-index: 40;
  min-width: 216px; padding: 4px;
  background: var(--canvas); border: 1px solid var(--border);
  border-radius: 6px; box-shadow: 0 8px 24px rgba(0,0,0,.28);
}
.menu[hidden] { display: none; }
.menu button {
  display: flex; align-items: center; gap: 8px; width: 100%;
  height: 30px; padding: 0 8px;
  font: inherit; font-size: 12px; text-align: left;
  color: var(--fg); background: transparent;
  border: 0; border-radius: 6px; cursor: pointer;
}
.menu button:hover { background: var(--neutral-muted); }
.menu button svg { fill: var(--fg-muted); flex: none; }
.menu button .hint {
  margin-left: auto; color: var(--fg-subtle); font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}
.menu hr { margin: 4px 6px; border: 0; border-top: 1px solid var(--border-muted); }

/* --- Arbeitsfläche ------------------------------------------------ */
.workspace { flex: 1; display: flex; min-height: 0; }
.pane { min-width: 0; display: flex; flex-direction: column; }
.pane-head {
  flex: none; height: 33px; display: flex; align-items: center; gap: 6px;
  padding: 0 16px; font-size: 12px; font-weight: 600; color: var(--fg-muted);
  background: var(--canvas-subtle); border-bottom: 1px solid var(--border);
}
#editorPane { flex: 1 1 50%; border-right: 1px solid var(--border); }
#previewPane { flex: 1 1 50%; }

#editor {
  flex: 1; width: 100%; resize: none; border: 0; outline: none;
  padding: 16px; background: var(--canvas); color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 13px; line-height: 1.55; tab-size: 2;
}
#preview { flex: 1; overflow: auto; }
#preview .wrap { padding: 32px; margin: 0 auto; max-width: 1012px; }

body[data-mode="write"]   #previewPane { display: none; }
body[data-mode="write"]   #editorPane  { flex-basis: 100%; border-right: 0; }
body[data-mode="preview"] #editorPane  { display: none; }
body[data-mode="preview"] #previewPane { flex-basis: 100%; }
body[data-mode="preview"] #preview .wrap { max-width: 900px; }

/* --- Statuszeile -------------------------------------------------- */
.statusbar {
  flex: none; height: 28px; display: flex; align-items: center; gap: 16px;
  padding: 0 12px; font-size: 12px; color: var(--fg-muted);
  background: var(--canvas-subtle); border-top: 1px solid var(--border);
}
.statusbar .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success-fg); }

/* --- Ablagefläche für Dateien ------------------------------------- */
#dropzone {
  position: fixed; inset: 0; z-index: 30; display: none;
  align-items: center; justify-content: center;
  background: var(--overlay); backdrop-filter: blur(2px);
}
#dropzone.on { display: flex; }
#dropzone div {
  padding: 24px 32px; font-weight: 600;
  background: var(--canvas); color: var(--fg);
  border: 2px dashed var(--accent-fg); border-radius: 12px;
}

/* --- Kurzmeldung -------------------------------------------------- */
#toast {
  position: fixed; bottom: 44px; left: 50%; transform: translateX(-50%) translateY(8px);
  padding: 8px 14px; font-size: 12px; font-weight: 500;
  background: var(--fg); color: var(--canvas);
  border-radius: 6px; opacity: 0; pointer-events: none; transition: .18s;
}
#toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* --- Schmale Fenster: kein geteilter Modus ------------------------ */
@media (max-width: 720px) {
  .workspace { flex-direction: column; }
  #editorPane { border-right: 0; border-bottom: 1px solid var(--border); }
  #preview .wrap { padding: 20px 16px; }
  .doc-name, .hide-sm { display: none; }
}

/* Rückfall, falls das Fenster selbst gedruckt wird: nur die Vorschau.
   Der Menüpunkt „Als PDF drucken“ nimmt stattdessen den eigenen Weg
   über ein sauber aufgebautes Dokument (siehe js/app.js). */
@media print {
  .topbar, .statusbar, #editorPane, .pane-head, #dropzone, #toast { display: none !important; }
  #previewPane { flex-basis: 100% !important; display: flex !important; }
  #preview { overflow: visible; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}