/* ==========================================================================
   LaTeX Studio – Design System
   Neutrale Flächen, Haarlinien, weiche Tiefe, ruhige Typografie.
   ========================================================================== */

:root {
  --font-ui: "Inter", "Inter var", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Fira Code", "Cascadia Code",
    "DejaVu Sans Mono", ui-monospace, Menlo, Consolas, monospace;
  --font-size: 13.5px;
  --editor-size: 14.5px;

  --r-xs: 5px;
  --r-sm: 7px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 18px;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;

  --radius: var(--r-md);
  --radius-sm: var(--r-sm);

  --topbar-h: 48px;
  --statusbar-h: 28px;
  --tabbar-h: 38px;
  --rail-w: 48px;
  --sidebar-w: 264px;
  --bottom-h: 220px;

  --transition: 160ms cubic-bezier(.2, .6, .2, 1);
  --fast: 110ms cubic-bezier(.2, .6, .2, 1);
}

/* --------------------------------------------------------------- Themes */
html[data-theme="dark"] {
  color-scheme: dark;

  --bg: #151819;
  --bg-1: #191d1e;
  --bg-2: #1d2223;
  --bg-3: #242a2b;
  --bg-4: #2c3334;

  --fg: #e8e9e4;
  --fg-dim: #a8b0ad;
  --fg-faint: #747f7c;

  --accent: #8ab8ad;
  --accent-2: #c8a879;
  --accent-soft: rgba(138, 184, 173, .14);
  --accent-fg: #101716;

  --ok: #4ade80;
  --warn: #fbbf24;
  --err: #ff7b72;
  --info: #6f8cff;

  --border: #2a3030;
  --border-2: #394241;
  --shadow: none;
  --shadow-sm: none;
  --sel: rgba(138, 184, 173, .28);
  --hover: rgba(235, 241, 235, .045);
  --active: rgba(235, 241, 235, .075);
  --scroll: #414b49;
  --pdf-bg: #111515;
  --pdf-page: #ffffff;
  --grid-line: rgba(255, 255, 255, .045);

  --cm-comment: #7b8496;
  --cm-command: #9cbdb5;
  --cm-env: #d1b487;
  --cm-arg: #b2c99a;
  --cm-math: #e0bd8a;
  --cm-string: #8ec6ba;
  --cm-bracket: #c5cbc2;
  --cm-error: #e5867f;
}

html[data-theme="light"] {
  color-scheme: light;

  --bg: #f7f6f1;
  --bg-1: #f1f0ea;
  --bg-2: #fbfaf6;
  --bg-3: #ffffff;
  --bg-4: #eae9e1;

  --fg: #262c2a;
  --fg-dim: #5c6662;
  --fg-faint: #828c87;

  --accent: #3d766b;
  --accent-2: #a57b47;
  --accent-soft: rgba(61, 118, 107, .11);
  --accent-fg: #ffffff;

  --ok: #128a4b;
  --warn: #a35c00;
  --err: #d1242f;
  --info: #4f46e5;

  --border: #e1e0d8;
  --border-2: #d1d2c9;
  --shadow: none;
  --shadow-sm: none;
  --sel: rgba(61, 118, 107, .2);
  --hover: rgba(35, 48, 42, .045);
  --active: rgba(35, 48, 42, .075);
  --scroll: #c2c7c0;
  --pdf-bg: #e9e8e1;
  --pdf-page: #ffffff;
  --grid-line: rgba(20, 24, 40, .05);

  --cm-comment: #7a8496;
  --cm-command: #365f79;
  --cm-env: #87693f;
  --cm-arg: #4e754d;
  --cm-math: #9b652c;
  --cm-string: #397a70;
  --cm-bracket: #626b65;
  --cm-error: #bb514b;
}

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

html, body {
  margin: 0; padding: 0; height: 100%;
  overflow: hidden;
  font-family: var(--font-ui);
  font-size: var(--font-size);
  line-height: 1.5;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

button, input, select, textarea { font: inherit; color: inherit; }
button { -webkit-tap-highlight-color: transparent; }

kbd {
  font-family: var(--font-mono); font-size: .8em; line-height: 1;
  background: var(--bg-3); border: 1px solid var(--border-2);
  border-bottom-width: 2px; border-radius: var(--r-xs);
  padding: 2px 6px; color: var(--fg-dim); white-space: nowrap;
}

::selection { background: var(--sel); }

.muted { color: var(--fg-dim); }
.hidden { display: none !important; }
[hidden] { display: none !important; }
.tb-flex { flex: 1 1 auto; min-width: 0; }

button:focus-visible,
[role="button"]:focus-visible,
.rail-btn:focus-visible,
.tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-radius: var(--r-sm);
}

/* ------------------------------------------------------------- Scrollbar */
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scroll); border-radius: 99px;
  border: 3px solid transparent; background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background-color: var(--fg-faint); }
::-webkit-scrollbar-corner { background: transparent; }

/* ---------------------------------------------------------------- Layout */
.layout {
  display: grid;
  grid-template-rows: var(--topbar-h) 1fr auto var(--statusbar-h);
  grid-template-columns: minmax(0, 1fr);
  height: 100vh;
}

#main {
  display: flex;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

/* --------------------------------------------------------------- Topbar */
#topbar {
  display: flex; align-items: center; gap: 6px;
  padding: 0 12px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  user-select: none;
  overflow-x: auto; overflow-y: hidden;
  scrollbar-width: none;
  z-index: 30;
}
#topbar::-webkit-scrollbar { display: none; }
.tb-group { display: flex; align-items: center; gap: 5px; flex: 0 0 auto; }
.tb-group.right { gap: 3px; }
.tb-label {
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .09em;
  color: var(--fg-faint); font-weight: 600; padding-right: 2px;
}
.tb-sep { width: 1px; height: 20px; background: var(--border-2); margin: 0 6px; opacity: .9; }

.brand { gap: 9px; padding-right: 6px; }
.logo {
  display: grid; place-items: center; width: 28px; height: 28px;
  background: var(--bg-4); color: var(--accent);
  border: 1px solid var(--border-2); border-radius: 7px;
}
.brand-name {
  font-weight: 620; letter-spacing: -.015em; font-size: 13.5px;
  color: var(--fg);
}

/* Buttons */
.tb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 30px; padding: 0 11px;
  background: transparent; border: 1px solid transparent;
  border-radius: var(--r-sm); cursor: pointer;
  color: var(--fg-dim); font-size: 12.5px; font-weight: 500; white-space: nowrap;
  transition: background var(--fast), border-color var(--fast),
    color var(--fast), transform var(--fast), box-shadow var(--fast);
}
.tb-btn:hover { background: var(--hover); border-color: var(--border-2); color: var(--fg); }
.tb-btn:active { transform: translateY(1px); }
.tb-btn.primary {
  background: var(--accent); border-color: transparent;
  color: var(--accent-fg); font-weight: 600;
  box-shadow: none;
}
.tb-btn.primary:hover { filter: brightness(1.07); background: var(--accent); border-color: transparent; color: var(--accent-fg); }
.tb-btn.danger { background: var(--err); border-color: transparent; color: #fff; font-weight: 600; }
.tb-btn.danger:hover { filter: brightness(1.06); background: var(--err); color: #fff; border-color: transparent; }
.tb-btn.toggle {
  background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  color: var(--accent); font-weight: 600;
}
.tb-btn.toggle:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.tb-btn .ico { font-size: 10px; }

/* Form controls */
.tb-select, .field select, .field input, .search-form input {
  height: 30px; padding: 0 9px;
  background: var(--bg-3); color: var(--fg);
  border: 1px solid var(--border-2); border-radius: var(--r-sm);
  outline: none; max-width: 220px;
  transition: border-color var(--fast), box-shadow var(--fast), background var(--fast);
}
.tb-select:hover, .field input:hover, .field select:hover { border-color: color-mix(in srgb, var(--border-2) 55%, var(--fg-faint)); }
.tb-select:focus, .field input:focus, .field select:focus, .search-form input:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
input[type="search"]::-webkit-search-cancel-button { filter: grayscale(1) opacity(.6); }
#project-select { max-width: 200px; font-weight: 600; }
#pdf-page {
  width: 54px; text-align: center; height: 28px;
  background: var(--bg-3); border: 1px solid var(--border-2);
  border-radius: var(--r-sm); color: var(--fg);
}

/* --------------------------------------------------------------- Sidebar */
#sidebar {
  display: flex; flex: 0 0 auto; min-width: 0;
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  position: relative;
}
#sidebar.collapsed { display: none; }

#rail {
  width: var(--rail-w);
  display: flex; flex-direction: column; align-items: center;
  padding: 8px 0; gap: 3px;
  background: var(--bg-2); border-right: 1px solid var(--border);
}
.rail-btn {
  width: 36px; height: 36px; display: grid; place-items: center;
  background: transparent; border: none; border-radius: var(--r-sm);
  color: var(--fg-faint); cursor: pointer;
  transition: background var(--fast), color var(--fast), transform var(--fast);
}
.rail-btn svg { width: 19px; height: 19px; }
.rail-btn:hover { background: var(--hover); color: var(--fg); }
.rail-btn:active { transform: scale(.94); }
.rail-btn.active {
  background: var(--accent-soft); color: var(--accent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent);
}
.rail-spacer { flex: 1; }

#panels { width: var(--sidebar-w); min-width: 140px; display: flex; overflow: hidden; }
.panel { display: none; flex-direction: column; width: 100%; min-width: 0; }
.panel.active { display: flex; }
.panel-head {
  display: flex; align-items: center; justify-content: space-between;
  height: 36px; padding: 0 8px 0 14px; gap: 8px;
  font-size: 10.5px; text-transform: uppercase; letter-spacing: .1em;
  font-weight: 650; color: var(--fg-faint);
  border-bottom: 1px solid var(--border);
  user-select: none; overflow: hidden;
}
.panel-head > span {
  flex: 0 1 auto; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.panel-actions { display: flex; gap: 1px; flex: 0 0 auto; margin-left: auto; }
.panel-actions button {
  display: grid; place-items: center; width: 24px; height: 24px;
  background: transparent; border: 1px solid transparent; color: var(--fg-dim);
  border-radius: var(--r-xs); cursor: pointer; padding: 0;
  transition: background var(--fast), color var(--fast), border-color var(--fast);
}
.panel-actions button svg {
  width: 15px; height: 15px;
  fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linecap: round; stroke-linejoin: round;
}
.panel-actions button:hover { background: var(--hover); color: var(--fg); border-color: var(--border-2); }
.panel-body { flex: 1; overflow: auto; padding: 6px 0; }

.vsplitter, .hsplitter, .hsplitter-up { position: absolute; z-index: 20; }
.vsplitter { right: -3px; top: 0; bottom: 0; width: 6px; cursor: col-resize; }
.hsplitter { left: -3px; top: 0; bottom: 0; width: 6px; cursor: col-resize; z-index: 25; }
.hsplitter-up { left: 0; right: 0; top: -3px; height: 6px; cursor: row-resize; }
.vsplitter:hover, .hsplitter:hover, .hsplitter-up:hover,
.vsplitter.dragging, .hsplitter.dragging, .hsplitter-up.dragging { background: var(--accent); }

/* ------------------------------------------------------------- Dateibaum */
.tree-item {
  display: flex; align-items: center; gap: 7px;
  padding: 4px 9px; cursor: pointer; user-select: none;
  margin: 1px 6px; border-radius: var(--r-sm);
  font-size: 13px; white-space: nowrap;
  color: var(--fg-dim);
  transition: background var(--fast), color var(--fast);
}
.tree-item:hover { background: var(--hover); color: var(--fg); }
.tree-item.active { background: var(--accent-soft); color: var(--fg); font-weight: 500; }
.tree-item .twisty {
  width: 14px; text-align: center; font-size: 9px; color: var(--fg-faint);
  flex: 0 0 14px; transition: transform var(--transition);
}
.tree-item.open > .twisty { transform: rotate(90deg); }
.tree-item .tico { width: 15px; text-align: center; font-size: 12px; flex: 0 0 15px; }
.tree-item .tico.tex { color: var(--cm-command); }
.tree-item .tico.bib { color: var(--cm-env); }
.tree-item .tico.img { color: var(--cm-arg); }
.tree-item .tname { overflow: hidden; text-overflow: ellipsis; }
.tree-item .tname.dirty { color: var(--warn); }
.tree-item .tdot { margin-left: auto; color: var(--warn); font-size: 14px; padding-right: 6px; }
.tree-item.selected { outline: 1px solid color-mix(in srgb, var(--accent) 70%, transparent); outline-offset: -1px; }
.tree-children { list-style: none; margin: 0; padding: 0; }
ul.tree-root { list-style: none; margin: 0; padding: 0; }

.ctx-menu {
  position: fixed; z-index: 200; min-width: 190px;
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-radius: var(--r-md); box-shadow: var(--shadow);
  padding: 5px; backdrop-filter: blur(14px);
  animation: pop 120ms ease-out;
}
.ctx-menu button {
  display: flex; width: 100%; gap: 9px; align-items: center;
  background: transparent; border: none; text-align: left;
  padding: 8px 10px; border-radius: var(--r-xs); cursor: pointer;
  color: var(--fg); font-size: 13px;
  transition: background var(--fast), color var(--fast);
}
.ctx-menu button:hover { background: var(--accent-soft); }
.ctx-menu button.danger { color: var(--err); }
.ctx-menu hr { border: none; border-top: 1px solid var(--border); margin: 5px 3px; }
@keyframes pop { from { opacity: 0; transform: translateY(-4px) scale(.985); } }

/* ------------------------------------------------------------- Outline */
.out-node { user-select: none; }
.out-row {
  display: flex; align-items: center; gap: 7px;
  padding: 4px 10px; margin: 1px 6px; border-radius: var(--r-sm);
  cursor: pointer; font-size: 13px; color: var(--fg-dim);
  border-left: 2px solid transparent;
  transition: background var(--fast), color var(--fast);
}
.out-row:hover { background: var(--hover); color: var(--fg); }
.out-row.current {
  background: var(--accent-soft); color: var(--fg);
  border-left-color: var(--accent);
}
.out-row .onum {
  color: var(--fg-faint); font-size: 11px; min-width: 26px; text-align: right;
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
}
.out-row .otitle { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.out-row.lvl-1 .otitle { color: var(--fg); font-weight: 600; }
.out-row.lvl-2 .otitle { font-weight: 550; }
.out-kind { font-size: 10px; color: var(--fg-faint); }
.out-row.todo .otitle { color: var(--warn); }

/* --------------------------------------------------------------- Suche */
.search-form {
  padding: 10px; display: flex; flex-direction: column; gap: 7px;
  border-bottom: 1px solid var(--border);
}
.search-form input { width: 100%; max-width: none; }
.search-opts { display: flex; gap: 12px; font-size: 11.5px; color: var(--fg-dim); }
.search-opts label { display: flex; gap: 5px; align-items: center; cursor: pointer; }
.search-opts input { accent-color: var(--accent); }
.search-actions { display: flex; gap: 6px; }
.search-actions button {
  flex: 1; background: var(--bg-3); border: 1px solid var(--border-2); color: var(--fg-dim);
  border-radius: var(--r-sm); font-size: 11.5px; padding: 5px 6px; cursor: pointer;
  transition: background var(--fast), color var(--fast), border-color var(--fast);
}
.search-actions button:hover { background: var(--bg-4); color: var(--fg); border-color: color-mix(in srgb, var(--accent) 50%, var(--border-2)); }
.search-stats { font-size: 11.5px; color: var(--fg-faint); }
.sr-file {
  padding: 8px 12px 3px; font-size: 11.5px; color: var(--accent); font-weight: 650;
  letter-spacing: .01em;
}
.sr-hit {
  display: flex; gap: 8px; padding: 3px 12px 3px 18px; cursor: pointer;
  margin: 1px 6px; border-radius: var(--r-xs);
  font-size: 12.5px; font-family: var(--font-mono); color: var(--fg-dim);
  transition: background var(--fast);
}
.sr-hit:hover { background: var(--hover); color: var(--fg); }
.sr-hit .sr-line { color: var(--fg-faint); min-width: 34px; text-align: right; }
.sr-hit mark, .tree-item mark {
  background: color-mix(in srgb, var(--warn) 40%, transparent);
  color: inherit; border-radius: 3px; padding: 0 1px;
}

/* ------------------------------------------------------------- Symbole */
.chip-row { display: flex; flex-wrap: wrap; gap: 5px; }
.chip {
  font-size: 11px; padding: 3px 9px; border-radius: 999px;
  background: var(--bg-3); border: 1px solid var(--border-2); cursor: pointer;
  color: var(--fg-dim); transition: all var(--fast);
}
.chip:hover { border-color: color-mix(in srgb, var(--accent) 55%, var(--border-2)); color: var(--fg); }
.chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.symbol-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 5px; padding: 10px; align-content: start;
}
.sym {
  height: 40px; display: grid; place-items: center;
  background: var(--bg-3); border: 1px solid var(--border); border-radius: var(--r-sm);
  cursor: pointer; font-size: 17px;
  transition: border-color var(--fast), background var(--fast), transform var(--fast), box-shadow var(--fast);
}
.sym:hover {
  border-color: var(--accent); background: var(--accent-soft);
  transform: translateY(-2px); box-shadow: var(--shadow-sm);
}
.sym .latex { display: none; }

/* --------------------------------------------------------------- Editor */
#editor-pane {
  flex: 1 1 auto; min-width: 240px; display: flex; flex-direction: column;
  position: relative; background: var(--bg);
}
#tabbar {
  height: var(--tabbar-h); display: flex; align-items: stretch;
  background: var(--bg-2); border-bottom: 1px solid var(--border);
  overflow-x: auto; overflow-y: hidden; scrollbar-width: thin;
}
.tab {
  display: flex; align-items: center; gap: 7px;
  padding: 0 10px 0 13px; font-size: 12.5px; color: var(--fg-dim);
  background: transparent; border-right: 1px solid var(--border);
  cursor: pointer; user-select: none; max-width: 220px; position: relative;
  white-space: nowrap;
  transition: background var(--fast), color var(--fast);
}
.tab:hover { background: var(--hover); color: var(--fg); }
.tab.active {
  background: var(--bg); color: var(--fg); font-weight: 550;
  box-shadow: inset 0 -2px 0 var(--accent);
}
.tab .tclose {
  width: 17px; height: 17px; display: grid; place-items: center;
  border-radius: var(--r-xs); font-size: 13px; color: var(--fg-faint); opacity: .55;
  transition: background var(--fast), color var(--fast), opacity var(--fast);
}
.tab .tclose:hover { background: var(--active); color: var(--fg); opacity: 1; }
.tab .tdirty { width: 8px; height: 8px; border-radius: 50%; background: var(--warn); }
.tab .ticon { color: var(--cm-command); font-size: 11px; }
#tabbar .tab-add {
  display: grid; place-items: center; width: 36px; background: transparent;
  border: none; color: var(--fg-faint); cursor: pointer; font-size: 16px;
  transition: color var(--fast), background var(--fast);
}
#tabbar .tab-add:hover { color: var(--fg); background: var(--hover); }

#editor-host { flex: 1; min-height: 0; position: relative; overflow: hidden; }
#editor-host .cm-editor { height: 100%; font-size: var(--editor-size); }
#editor-host .cm-scroller { font-family: var(--font-mono); line-height: 1.65; }
#editor-host .cm-gutters {
  background: var(--bg); border-right: 1px solid var(--border);
  color: var(--fg-faint);
}
#editor-host .cm-activeLineGutter { background: transparent; color: var(--accent); }
#editor-host .cm-activeLine { background: color-mix(in srgb, var(--accent) 7%, transparent); }
#editor-host .cm-cursor, #editor-host .cm-dropCursor { border-left-color: var(--accent); border-left-width: 2px; }
#editor-host .cm-selectionBackground, #editor-host .cm-content ::selection { background: var(--sel) !important; }
#editor-host .cm-selectionMatch { background: color-mix(in srgb, var(--accent) 16%, transparent); }
#editor-host .cm-matchingBracket,
#editor-host .cm-focused > .cm-scroller > .cm-line > .cm-matchingBracket {
  background: var(--accent-soft); outline: 1px solid var(--accent); color: inherit;
}
#editor-host .cm-nonmatchingBracket { color: var(--err); }
#editor-host .cm-panels { background: var(--bg-2); border-color: var(--border); }
#editor-host .cm-panel input, #editor-host .cm-panel button {
  background: var(--bg-3); color: var(--fg);
  border: 1px solid var(--border-2); border-radius: var(--r-xs);
}
#editor-host .cm-tooltip {
  background: var(--bg-2) !important; border: 1px solid var(--border-2) !important;
  border-radius: var(--r-md); box-shadow: var(--shadow); overflow: hidden;
}
#editor-host .cm-tooltip-autocomplete > ul > li[aria-selected] {
  background: var(--accent-soft) !important; color: var(--fg) !important;
}
#editor-host .cm-tooltip-autocomplete > ul > li {
  padding: 5px 9px !important; font-family: var(--font-mono); font-size: 13px;
}
#editor-host .cm-completionIcon { opacity: .8; }
#editor-host .cm-completionLabel { color: var(--fg); }
#editor-host .cm-completionDetail {
  color: var(--fg-faint); font-style: normal; font-size: 11.5px; margin-left: 8px;
}
#editor-host .cm-placeholder { color: var(--fg-faint); }
#editor-host .cm-searchMatch {
  background: color-mix(in srgb, var(--warn) 34%, transparent);
  outline: 1px solid color-mix(in srgb, var(--warn) 65%, transparent);
}
#editor-host .cm-searchMatch-selected { background: color-mix(in srgb, var(--warn) 58%, transparent); }
#editor-host .cm-foldGutter span { color: var(--fg-faint); }
#editor-host .cm-foldPlaceholder {
  background: var(--bg-3); border: 1px solid var(--border-2);
  color: var(--accent); border-radius: var(--r-xs); padding: 0 6px;
}
#editor-host .cm-lineNumbers .cm-gutterElement { padding: 0 9px 0 14px; min-width: 42px; }

/* Token */
.tok-comment { color: var(--cm-comment); font-style: italic; }
.tok-command { color: var(--cm-command); }
.tok-env { color: var(--cm-env); font-weight: 500; }
.tok-arg { color: var(--cm-arg); }
.tok-math { color: var(--cm-math); }
.tok-string { color: var(--cm-string); }
.tok-bracket { color: var(--cm-bracket); }
.tok-error { color: var(--cm-error); text-decoration: underline wavy var(--cm-error); }
.tok-meta { color: var(--fg-dim); }
.tok-number { color: var(--cm-math); }
.tok-var { color: var(--cm-env); }

/* Welcome */
.welcome {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: var(--bg); z-index: 5; padding: 24px;
}
.welcome-card {
  max-width: 620px; padding: 40px 42px; text-align: left;
  background: linear-gradient(180deg, color-mix(in srgb, var(--bg-2) 70%, transparent), transparent);
  border: 1px solid var(--border); border-radius: var(--r-xl);
  box-shadow: var(--shadow-sm);
}
.welcome-card h1 {
  margin: 0 0 8px; font-size: 32px; font-weight: 680; letter-spacing: -.03em;
  background: linear-gradient(92deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.welcome-card p { margin: 0 0 22px; color: var(--fg-dim); font-size: 14px; }
.welcome-actions {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; margin-bottom: 22px;
}
.welcome-actions button {
  padding: 12px 14px; text-align: left; background: var(--bg-3);
  border: 1px solid var(--border-2); border-radius: var(--r-md);
  cursor: pointer; color: var(--fg); display: flex; justify-content: space-between;
  gap: 8px; align-items: center; font-size: 13px; font-weight: 500;
  transition: border-color var(--fast), background var(--fast), transform var(--fast);
}
.welcome-actions button:hover {
  border-color: var(--accent); background: var(--bg-4); transform: translateY(-1px);
}
.welcome-tips {
  margin: 0; padding-left: 18px; color: var(--fg-faint);
  font-size: 12.5px; line-height: 1.95;
}
.welcome-tips b { color: var(--fg-dim); font-weight: 600; }

/* --------------------------------------------------------------- Split */
#main-splitter { flex: 0 0 6px; background: transparent; }
#main-splitter:hover, #main-splitter.dragging { background: var(--accent); }

/* -------------------------------------------------------------- Preview */
#preview-pane {
  flex: 0 0 46%; min-width: 280px;
  display: flex; flex-direction: column;
  background: var(--bg-1); border-left: 1px solid var(--border);
}
#preview-pane.collapsed { display: none; }
#pdf-toolbar, #pdf-searchbar {
  display: flex; align-items: center; gap: 4px;
  height: 36px; padding: 0 8px;
  background: var(--bg-2); border-bottom: 1px solid var(--border);
  overflow-x: auto; scrollbar-width: none; user-select: none;
}
#pdf-toolbar .tb-btn, #pdf-searchbar .tb-btn { height: 26px; padding: 0 8px; font-size: 12px; }
#pdf-searchbar { height: 36px; }
#pdf-searchbar input {
  height: 26px; flex: 1; min-width: 120px;
  background: var(--bg-3); border: 1px solid var(--border-2);
  border-radius: var(--r-sm); padding: 0 9px; color: var(--fg); outline: none;
}
#pdf-searchbar input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
#pdf-viewer {
  flex: 1; overflow: auto; position: relative;
  background: var(--pdf-bg); scroll-behavior: smooth;
}
.pdf-empty {
  position: absolute; inset: 0; display: grid; place-content: center;
  text-align: center; color: var(--fg-dim); gap: 6px; padding: 20px;
}
#pdf-pages { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 20px 12px 64px; }
.pdf-page {
  position: relative; background: var(--pdf-page);
  box-shadow: 0 12px 34px rgba(0, 0, 0, .38), 0 0 0 1px rgba(0, 0, 0, .16);
  overflow: hidden; flex: 0 0 auto; border-radius: 2px;
}
.pdf-page canvas { display: block; }
.pdf-page .text-layer {
  position: absolute; inset: 0; overflow: hidden; opacity: 1; line-height: 1;
  user-select: text; z-index: 2;
}
.pdf-page .text-layer span {
  position: absolute; white-space: pre; transform-origin: 0 0;
  color: transparent; cursor: text;
}
.pdf-page .text-layer span::selection { background: rgba(79, 110, 255, .42); }
.pdf-page .page-num {
  position: absolute; bottom: -1px; left: 0; right: 0; text-align: center;
  font-size: 11px; color: var(--fg-faint); transform: translateY(100%); padding-top: 4px;
  font-variant-numeric: tabular-nums;
}
.pdf-page .sync-highlight {
  position: absolute; pointer-events: none; z-index: 3;
  background: rgba(255, 196, 0, .3); outline: 2px solid rgba(255, 165, 0, .85);
  border-radius: 4px; transition: opacity .4s;
}
.pdf-page .search-hit {
  position: absolute; pointer-events: none; z-index: 3;
  background: rgba(255, 214, 0, .45); outline: 1px solid rgba(255, 180, 0, .9); border-radius: 2px;
}
.pdf-loading { color: var(--fg-dim); padding: 30px; text-align: center; }

/* ---------------------------------------------------------- Bottom Panel */
#bottom-panel {
  display: flex; flex-direction: column; position: relative;
  height: var(--bottom-h); min-height: 110px;
  background: var(--bg-1); border-top: 1px solid var(--border);
}
#bottom-panel.hidden { display: none; }
#bottom-head {
  display: flex; align-items: center; gap: 4px; height: 36px;
  padding: 0 8px; background: var(--bg-2); border-bottom: 1px solid var(--border);
  user-select: none;
}
.btab {
  background: transparent; border: none; color: var(--fg-faint);
  padding: 6px 12px; cursor: pointer; font-size: 12.5px; font-weight: 500;
  border-radius: var(--r-sm); position: relative;
  transition: color var(--fast), background var(--fast);
}
.btab:hover { color: var(--fg); background: var(--hover); }
.btab.active {
  color: var(--fg); background: var(--active);
  box-shadow: inset 0 -2px 0 var(--accent);
}
.badge {
  background: var(--err); color: #fff; font-size: 10.5px; font-weight: 700;
  border-radius: 999px; padding: 1px 6px; margin-left: 5px;
}
.badge.warn { background: var(--warn); color: #241a00; }
#bottom-body { flex: 1; min-height: 0; position: relative; }
.bpane { position: absolute; inset: 0; overflow: auto; display: none; }
.bpane.active { display: block; }
.console {
  margin: 0; padding: 12px 16px; font-family: var(--font-mono);
  font-size: 12.5px; line-height: 1.6; white-space: pre-wrap; word-break: break-word;
  color: var(--fg-dim);
}
.console .line-err { color: var(--err); }
.console .line-warn { color: var(--warn); }
.console .line-ok { color: var(--ok); }
.console .line-cmd { color: var(--accent); }
.console .line-dim { color: var(--fg-faint); }
.issue {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 8px 16px; cursor: pointer;
  border-bottom: 1px solid var(--border);
  font-size: 13px; transition: background var(--fast);
}
.issue:hover { background: var(--hover); }
.issue .sev {
  width: 17px; height: 17px; border-radius: 50%; display: grid; place-items: center;
  font-size: 10px; font-weight: 800; flex: 0 0 17px; margin-top: 2px; color: #0b1220;
}
.issue.error .sev { background: var(--err); color: #fff; }
.issue.warning .sev { background: var(--warn); }
.issue.info .sev { background: var(--info); color: #fff; }
.issue .imsg { flex: 1; line-height: 1.45; }
.issue .issue-fix { display: block; margin-top: 5px; color: var(--fg-faint); font-size: 12px; }
.issue .iloc {
  color: var(--fg-faint); font-family: var(--font-mono); font-size: 12px;
  white-space: nowrap; font-variant-numeric: tabular-nums;
}
.issue .isrc {
  display: block; color: var(--fg-faint); font-size: 12px;
  font-family: var(--font-mono); margin-top: 2px; opacity: .8;
}
.problems-empty { padding: 22px; color: var(--fg-faint); text-align: center; }

/* ------------------------------------------------------------- Statusbar */
#statusbar {
  display: flex; align-items: center; gap: 2px;
  background: var(--bg-2); border-top: 1px solid var(--border);
  font-size: 11.5px; color: var(--fg-dim); padding: 0 8px; user-select: none;
  overflow: hidden; font-variant-numeric: tabular-nums;
}
.st-item {
  padding: 0 9px; height: 100%; display: flex; align-items: center; gap: 5px;
  white-space: nowrap;
}
.st-btn { cursor: pointer; border-radius: var(--r-xs); transition: background var(--fast), color var(--fast); }
.st-btn:hover { background: var(--hover); color: var(--fg); }
#st-build.ok { color: var(--ok); }
#st-build.err { color: var(--err); }
#st-build.busy { color: var(--warn); }
#st-issues .err { color: var(--err); font-weight: 700; }
#st-issues .warn { color: var(--warn); font-weight: 700; }

/* --------------------------------------------------------------- Modals */
#modal-root {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(6, 8, 14, .55); backdrop-filter: blur(6px);
  display: grid; place-items: center; animation: fade 140ms ease-out;
}
@keyframes fade { from { opacity: 0; } }
.modal { display: none; width: 100%; height: 100%; place-items: center; }
.modal.active { display: grid; }
.modal-card {
  width: min(540px, 92vw); max-height: 88vh; overflow: auto;
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-radius: var(--r-lg); box-shadow: var(--shadow); padding: 24px;
  animation: pop 160ms cubic-bezier(.2, .9, .3, 1.15);
}
.modal-card.wide { width: min(760px, 94vw); }
.modal-card h2 {
  margin: 0 0 18px; font-size: 17px; font-weight: 650; letter-spacing: -.02em;
}
.field {
  display: flex; flex-direction: column; gap: 6px; margin-bottom: 15px; font-size: 13px;
}
.field > span { color: var(--fg-dim); font-size: 12px; font-weight: 500; }
.field input, .field select { max-width: none; width: 100%; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

.settings-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px 20px; }

/* ------------------------------------------------------- Paketverwaltung */
.package-card { display: flex; flex-direction: column; }
.package-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.package-heading h2 { margin-bottom: 3px; }
.package-heading p, .package-note { color: var(--fg-faint); font-size: 12px; line-height: 1.55; margin: 0 0 15px; }
.package-tools { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.package-tools input { flex: 1; max-width: none; min-width: 0; }
.package-tools span { white-space: nowrap; font-size: 11.5px; }
.package-list { max-height: min(46vh, 420px); overflow: auto; border: 1px solid var(--border); border-radius: var(--r-md); background: var(--bg-1); }
.package-row { min-height: 52px; display: flex; align-items: center; gap: 16px; padding: 8px 12px; border-bottom: 1px solid var(--border); }
.package-row:last-child { border-bottom: 0; }
.package-copy { min-width: 0; flex: 1; display: flex; flex-direction: column; }
.package-copy strong { font-size: 12.5px; font-weight: 600; }
.package-copy span { color: var(--fg-faint); font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.package-row.missing { box-shadow: inset 2px 0 var(--warn); }
.package-status { font-size: 11px; color: var(--ok); white-space: nowrap; }
.package-row.missing .package-status { color: var(--warn); }
.package-install, .package-fix-action { min-width: 92px; height: 27px; padding: 0 9px; font-size: 11.5px; }
.package-fix-action { flex: none; align-self: center; }
.package-empty { padding: 22px 16px; text-align: center; color: var(--fg-faint); font-size: 12.5px; }
.package-custom { display: flex; gap: 8px; margin-top: 12px; }
.package-custom input { flex: 1; min-width: 0; max-width: none; }
.package-note { margin: 8px 0 0; }

.template-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.tpl {
  border: 1px solid var(--border-2); background: var(--bg-3); border-radius: var(--r-md);
  padding: 12px; cursor: pointer;
  transition: border-color var(--fast), background var(--fast),
    transform var(--fast), box-shadow var(--fast);
}
.tpl:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.tpl.active {
  border-color: var(--accent); background: var(--accent-soft);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.tpl b { display: block; font-size: 13.5px; margin-bottom: 3px; font-weight: 600; }
.tpl span { font-size: 11.5px; color: var(--fg-faint); line-height: 1.45; display: block; }

/* Demo-Projekte */
.modal-note {
  font-size: 12.5px; color: var(--fg-dim); margin: -8px 0 16px; line-height: 1.6;
}
.demo-list {
  display: flex; flex-direction: column; gap: 8px;
  max-height: 52vh; overflow: auto; padding-right: 4px;
}
.demo-card {
  display: flex; align-items: center; gap: 13px; padding: 12px 14px; cursor: pointer;
  border: 1px solid var(--border-2); background: var(--bg-3); border-radius: var(--r-md);
  transition: border-color var(--fast), transform var(--fast), box-shadow var(--fast);
}
.demo-card:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.demo-card.done { opacity: .55; cursor: default; }
.demo-card.done:hover { border-color: var(--border-2); transform: none; box-shadow: none; }
.demo-card input { accent-color: var(--accent); width: 15px; height: 15px; flex: none; }
.demo-body { display: flex; flex-direction: column; gap: 3px; flex: 1; min-width: 0; }
.demo-body b { font-size: 13.5px; font-weight: 600; }
.demo-body span { font-size: 11.5px; color: var(--fg-faint); line-height: 1.5; }
.demo-flag {
  flex: none; font-size: 10px; text-transform: uppercase; letter-spacing: .06em;
  color: var(--fg-faint); border: 1px solid var(--border-2);
  border-radius: 999px; padding: 3px 10px;
}
.demo-card:not(.done) .demo-flag {
  color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, transparent);
}

/* Palette */
.modal.palette { align-items: flex-start; padding-top: 12vh; }
.palette-card { padding: 0; overflow: hidden; border-radius: var(--r-lg); }
.palette-card input {
  width: 100%; height: 54px; padding: 0 20px; font-size: 16px;
  background: var(--bg-2); border: none; border-bottom: 1px solid var(--border);
  outline: none; color: var(--fg);
}
.palette-card input::placeholder { color: var(--fg-faint); }
.palette-list { max-height: 360px; overflow: auto; padding: 7px; }
.pal-item {
  display: flex; align-items: center; gap: 11px; padding: 9px 13px;
  border-radius: var(--r-sm); cursor: pointer; font-size: 13.5px; color: var(--fg-dim);
  transition: background var(--fast), color var(--fast);
}
.pal-item .pal-key { margin-left: auto; font-size: 11.5px; color: var(--fg-faint); }
.pal-item .pal-ico { width: 18px; text-align: center; color: var(--accent); }
.pal-item.selected { background: var(--accent-soft); color: var(--fg); }
.pal-empty { padding: 18px; color: var(--fg-faint); text-align: center; }

.shortcut-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 6px 22px;
}
.sc {
  display: flex; justify-content: space-between; gap: 12px; padding: 7px 0;
  border-bottom: 1px dashed var(--border); font-size: 13px;
}
.sc .sc-desc { color: var(--fg-dim); }
.sc-group {
  grid-column: 1 / -1; margin-top: 14px; font-size: 10.5px;
  text-transform: uppercase; letter-spacing: .1em; color: var(--accent); font-weight: 650;
}

/* Toasts */
#toasts {
  position: fixed; right: 16px; bottom: 44px;
  display: flex; flex-direction: column; gap: 8px; z-index: 300;
}
.toast {
  background: var(--bg-2); border: 1px solid var(--border-2);
  border-left: 3px solid var(--accent); border-radius: var(--r-md);
  padding: 11px 14px; min-width: 240px; max-width: 380px;
  box-shadow: var(--shadow); font-size: 13px;
  backdrop-filter: blur(10px);
  animation: toastin 200ms cubic-bezier(.2, .9, .3, 1.15);
}
.toast.ok { border-left-color: var(--ok); }
.toast.err { border-left-color: var(--err); }
.toast.warn { border-left-color: var(--warn); }
.toast b { display: block; margin-bottom: 2px; font-weight: 600; }
@keyframes toastin { from { transform: translateX(28px); opacity: 0; } }

/* Sync-Flash auf dem Titel */
#sync-flash {
  position: fixed; top: 8px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: var(--accent-fg); font-weight: 600; font-size: 12.5px;
  padding: 6px 16px; border-radius: 999px; z-index: 400; box-shadow: var(--shadow-sm);
}

/* Markierung der Sync-TeX-Zeile im Editor */
.cm-syncLine {
  background: rgba(255, 196, 0, .16) !important;
  box-shadow: inset 3px 0 0 rgba(255, 180, 0, .85);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}