/* ============================================================================
   VelvetOS — application styles (shared chrome, Files, Terminal, Settings,
   Browser, Text Editor, Calculator)
   ========================================================================== */

.app { display: flex; flex-direction: column; width: 100%; height: 100%; min-height: 0; background: var(--window-bg); }

/* ---------- generic app chrome ---------- */
.app-toolbar {
  display: flex; align-items: center; gap: var(--sp-2);
  min-height: 44px; padding: 6px 10px; flex: none;
  border-bottom: 1px solid var(--divider);
  background: var(--window-bg);
}
.app-toolbar .tb-title { font-size: var(--fs-body); font-weight: var(--fw-medium); }
.app-toolbar .grow { flex: 1 1 auto; }
.app-toolbar .field { height: 32px; }
.app-toolbar .toolbar-sep { width: 1px; height: 22px; background: var(--divider); margin: 0 4px; }

.app-body { flex: 1 1 auto; min-height: 0; display: flex; }
.app-main { flex: 1 1 auto; min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.app-side {
  flex: none; width: 232px; padding: var(--sp-2) var(--sp-2) var(--sp-4);
  overflow-y: auto; border-right: 1px solid var(--divider);
  background: var(--surface-1);
}
.app-status {
  display: flex; align-items: center; gap: var(--sp-4); flex: none;
  height: 26px; padding: 0 12px; border-top: 1px solid var(--divider);
  font-size: var(--fs-caption); color: var(--on-surface-3);
  background: var(--surface-1);
}
.app-crumbs {
  display: flex; align-items: center; gap: 2px; flex: 1 1 auto; min-width: 0;
  overflow-x: auto; scrollbar-width: none; padding: 0 4px;
}
.app-crumbs::-webkit-scrollbar { display: none; }
.crumb {
  padding: 4px 8px; border-radius: var(--r-xs); font-size: var(--fs-label);
  color: var(--on-surface-2); cursor: pointer; white-space: nowrap;
}
.crumb:hover { background: var(--surface-2); }
.crumb.current { background: var(--surface-3); color: var(--on-surface); font-weight: var(--fw-medium); }
.crumb-sep { color: var(--on-surface-4); display: flex; }

.side-section { padding: var(--sp-2) var(--sp-3) 4px; font-size: var(--fs-caption); letter-spacing: .6px; text-transform: uppercase; color: var(--on-surface-3); }
.side-item {
  display: flex; align-items: center; gap: var(--sp-3);
  height: 34px; padding: 0 12px; border-radius: var(--r-full);
  cursor: pointer; color: var(--on-surface-2); font-size: var(--fs-body);
}
.side-item:hover { background: var(--surface-3); }
.side-item.active { background: var(--primary-container); color: var(--on-primary-container); font-weight: var(--fw-medium); }
.side-item .icon { width: 18px; height: 18px; }
.side-item .si-count { margin-left: auto; font-size: var(--fs-caption); color: var(--on-surface-4); }

/* ---------- file views ---------- */
.fv-scroll { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: var(--sp-3); }
.fv-grid {
  display: grid; gap: var(--sp-2);
  grid-template-columns: repeat(auto-fill, minmax(126px, 1fr));
}
.fv-tile {
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-2);
  padding: var(--sp-4) var(--sp-2) var(--sp-3);
  border-radius: var(--r-m); cursor: pointer; text-align: center;
  border: 1px solid transparent; position: relative;
}
.fv-tile:hover { background: var(--surface-2); }
.fv-tile.selected { background: var(--primary-container); border-color: color-mix(in srgb, var(--primary) 40%, transparent); }
.fv-tile .fv-thumb {
  width: 68px; height: 68px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--r-s); overflow: hidden; background: var(--surface-2);
}
.fv-tile .fv-thumb img { width: 100%; height: 100%; object-fit: cover; }
.fv-tile .fv-thumb .icon { width: 40px; height: 40px; color: var(--on-surface-3); }
.fv-tile .fv-name { font-size: var(--fs-label); word-break: break-word; line-height: 1.3; }
.fv-tile .fv-sub { font-size: var(--fs-caption); color: var(--on-surface-4); }
.fv-row {
  display: flex; align-items: center; gap: var(--sp-3);
  height: 40px; padding: 0 12px; border-radius: var(--r-s); cursor: pointer;
  border: 1px solid transparent;
}
.fv-row:hover { background: var(--surface-2); }
.fv-row.selected { background: var(--primary-container); border-color: color-mix(in srgb, var(--primary) 35%, transparent); }
.fv-row .icon { width: 20px; height: 20px; color: var(--on-surface-3); flex: none; }
.fv-row .fv-thumb-s { width: 24px; height: 24px; border-radius: 3px; overflow: hidden; flex: none; background: var(--surface-2); }
.fv-row .fv-thumb-s img { width: 100%; height: 100%; object-fit: cover; }
.fv-row .fv-name { flex: 1 1 auto; min-width: 0; font-size: var(--fs-body); }
.fv-row .fv-col { flex: none; width: 110px; font-size: var(--fs-label); color: var(--on-surface-3); }
.fv-row .fv-col.small { width: 90px; }
.fv-head {
  display: flex; align-items: center; gap: var(--sp-3); height: 30px; padding: 0 12px;
  font-size: var(--fs-caption); color: var(--on-surface-3); border-bottom: 1px solid var(--divider);
  position: sticky; top: 0; background: var(--window-bg); z-index: 2;
}
.fv-head .fv-col { flex: none; width: 110px; }
.fv-head .fv-col.small { width: 90px; }
.fv-head .fv-name { flex: 1 1 auto; }
.fv-marquee {
  position: absolute; border: 1px solid var(--primary);
  background: color-mix(in srgb, var(--primary) 18%, transparent);
  pointer-events: none; z-index: 3;
}
.drop-hint {
  position: absolute; inset: 8px; border: 2px dashed var(--primary);
  border-radius: var(--r-l); background: color-mix(in srgb, var(--primary) 12%, transparent);
  display: flex; align-items: center; justify-content: center; gap: var(--sp-3);
  pointer-events: none; z-index: 6; font-size: var(--fs-body); color: var(--on-surface);
}

/* file chip / icon colors */
.ic-folder { color: #5f6368; }
.ic-doc { color: #1a73e8; }
.ic-img { color: #1e8e3e; }
.ic-audio { color: #e8710a; }
.ic-video { color: #d93025; }
.ic-code { color: #7b1fa2; }
.ic-archive { color: #f9ab00; }

/* ============================== TERMINAL ================================ */
.app-term {
  background: #16171a; color: #d7dae0;
  display: flex; flex-direction: column; height: 100%;
}
.app-term.light { background: #fbfbfd; color: #202124; }
.term-out {
  flex: 1 1 auto; min-height: 0; overflow-y: auto;
  padding: 10px 14px; font-family: var(--font-mono); font-size: var(--fs-mono);
  line-height: 1.55; white-space: pre-wrap; word-break: break-word;
}
.term-line { min-height: 1.55em; }
.term-prompt { color: #81c995; }
.app-term.light .term-prompt { color: #1e8e3e; }
.term-user { color: #8ab4f8; }
.app-term.light .term-user { color: #1a73e8; }
.term-path { color: #fdd663; }
.app-term.light .term-path { color: #b06000; }
.term-err { color: #f28b82; }
.term-ok { color: #81c995; }
.term-dim { color: #80868b; }
.term-hi { color: #c58af9; }
.term-input-row { display: flex; gap: 8px; align-items: baseline; }
.term-input {
  flex: 1 1 auto; border: 0; background: transparent; outline: none;
  font-family: var(--font-mono); font-size: var(--fs-mono);
  color: inherit; caret-color: currentColor;
}
.term-cursor {
  display: inline-block; width: 8px; height: 15px; background: currentColor;
  vertical-align: text-bottom; animation: blink 1.05s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.term-tabs { display: flex; gap: 2px; padding: 4px 6px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.app-term.light .term-tabs { border-bottom-color: var(--divider); }
.term-tab {
  padding: 5px 12px; border-radius: 6px 6px 0 0; font-size: var(--fs-caption);
  color: #9aa0a6; cursor: pointer; display: flex; align-items: center; gap: 6px;
}
.term-tab.active { background: rgba(255,255,255,.08); color: #e8eaed; }
.app-term.light .term-tab.active { background: var(--surface-2); color: var(--on-surface); }
.term-tab .icon { width: 12px; height: 12px; }
.term-neofetch { display: flex; gap: 18px; }
.term-neofetch .nf-art { color: #8ab4f8; white-space: pre; }

/* ============================== SETTINGS ================================ */
.app-settings .app-main { background: var(--window-bg); }
.set-nav { width: 300px; padding: var(--sp-2); padding-top: 0; }
.set-nav .field { margin: var(--sp-3) var(--sp-2) var(--sp-3); }
.set-page { padding: var(--sp-2) var(--sp-6) var(--sp-8); max-width: 900px; }
.set-hero {
  display: flex; align-items: center; gap: var(--sp-4);
  margin: var(--sp-4) 0 var(--sp-6);
}
.set-hero .sh-icon {
  width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--primary-container); color: var(--on-primary-container);
}
.set-hero .sh-icon .icon { width: 26px; height: 26px; }
.set-title { font-size: var(--fs-title-lg); font-weight: var(--fw-regular); margin: var(--sp-6) 0 var(--sp-3); }
.set-title:first-child { margin-top: var(--sp-3); }
.set-sub { font-size: var(--fs-label); color: var(--on-surface-3); margin-bottom: var(--sp-2); }
.set-card {
  border: 1px solid var(--outline-variant); border-radius: var(--r-l);
  overflow: hidden; margin-bottom: var(--sp-4); background: var(--surface);
}
.set-card-title { padding: var(--sp-3) var(--sp-4) var(--sp-1); font-size: var(--fs-label); font-weight: var(--fw-medium); }
.set-col { display: flex; flex-direction: column; }
.set-row {
  display: flex; align-items: center; gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4); min-height: 48px; cursor: pointer;
  border-radius: 0;
}
.set-row:hover { background: var(--surface-2); }
.set-row .sr-icon { color: var(--on-surface-3); flex: none; display: flex; }
.set-row .sr-text { flex: 1 1 auto; min-width: 0; }
.set-row .sr-title { font-size: var(--fs-body); }
.set-row .sr-sub { font-size: var(--fs-caption); color: var(--on-surface-3); margin-top: 2px; line-height: 1.4; }
.set-row .sr-ctrl { flex: none; display: flex; align-items: center; gap: var(--sp-2); }
.set-row.static { cursor: default; }
.set-row.static:hover { background: transparent; }
.set-row.selected { background: var(--primary-container); }
.set-row.selected .sr-title { color: var(--on-primary-container); }
.set-row .slider { width: 180px; }
.set-desc { padding: 0 var(--sp-4) var(--sp-4); font-size: var(--fs-caption); color: var(--on-surface-3); line-height: 1.6; }
.set-warning {
  margin: var(--sp-3) 0 var(--sp-2); padding: 12px 16px;
  border-radius: var(--r-m); background: var(--surface-2);
  border-left: 3px solid var(--warning, #f29900);
  font-size: var(--fs-caption); color: var(--on-surface-2); line-height: 1.6;
}
.set-search-results { padding: var(--sp-2); }
.set-banner {
  display: flex; gap: var(--sp-4); align-items: center; padding: var(--sp-4);
  border-radius: var(--r-l); background: var(--primary-container); color: var(--on-primary-container);
  margin-bottom: var(--sp-4);
}
.set-banner .icon { width: 24px; height: 24px; flex: none; }
.set-about-logo {
  width: 96px; height: 96px; border-radius: 26px; margin: 8px auto 26px;
  background: linear-gradient(140deg, var(--accent), #7b1fa2);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--elevation-2);
}
.set-about-logo svg { width: 52px; height: 52px; color: #fff; }
.set-about-name { text-align: center; font-family: var(--font-display); font-size: 26px; letter-spacing: 2px; }
.set-about-ver { text-align: center; font-size: var(--fs-label); color: var(--on-surface-3); margin: 10px 0 30px; }
.set-storage-bar {
  display: flex; height: 12px; border-radius: 6px; overflow: hidden; background: var(--surface-3);
  margin: var(--sp-2) 0 var(--sp-3);
}
.set-storage-bar span { height: 100%; }
.set-legend { display: flex; flex-wrap: wrap; gap: var(--sp-4); font-size: var(--fs-caption); color: var(--on-surface-3); }
.set-legend .lg-item { display: flex; align-items: center; gap: 6px; }
.set-legend .lg-swatch { width: 10px; height: 10px; border-radius: 3px; }

.wallpaper-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--sp-3); }
.wallpaper-item {
  position: relative; aspect-ratio: 16 / 10; border-radius: var(--r-m); overflow: hidden;
  cursor: pointer; border: 2px solid transparent; background-size: cover; background-position: center;
  box-shadow: var(--elevation-1);
}
.wallpaper-item:hover { box-shadow: var(--elevation-3); }
.wallpaper-item.selected { border-color: var(--primary); }
.wallpaper-item .wi-name {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 6px 8px;
  background: linear-gradient(to top, rgba(0,0,0,.6), transparent);
  color: #fff; font-size: var(--fs-caption);
}
.accent-swatches { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.accent-swatch {
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; box-shadow: inset 0 0 0 1px rgba(0,0,0,.1);
}
.accent-swatch.selected { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--primary); }

/* ============================== BROWSER ================================= */
.app-browser { background: var(--window-bg); position: relative; }

/* ---------- tab strip (lives in the window title bar) ---------- */
.br-tabs {
  display: flex; align-items: center; gap: 4px; flex: 1 1 auto; min-width: 0;
  height: 100%; overflow: hidden;
}
.br-tab {
  display: flex; align-items: center; gap: 7px; min-width: 92px; max-width: 240px;
  flex: 0 1 200px; height: 30px; padding: 0 6px 0 10px; border-radius: 8px 8px 0 0;
  background: transparent; cursor: pointer; font-size: var(--fs-caption); color: var(--on-surface-3);
  transition: background var(--dur-s);
}
.br-tab:hover { background: var(--shelf-icon-bg); }
.br-tab.active { background: var(--window-bg); color: var(--on-surface); }
.br-tab.loading .br-fav { opacity: .35; }
.br-tab-title { display: flex; align-items: center; gap: 7px; flex: 1 1 auto; min-width: 0; }
.br-tab-title .icon { width: 15px; height: 15px; flex: none; }
.br-tab-title .wt-text { font-weight: var(--fw-medium); }
.br-tab .bt-title { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.br-tab .bt-close { width: 20px; height: 20px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex: none; }
.br-tab .bt-close:hover { background: var(--shelf-icon-hover); }
.br-tab .bt-close .icon { width: 12px; height: 12px; }
.br-newtab-btn { flex: none; margin-left: 2px; }

/* ---------- toolbar ---------- */
.br-toolbar { display: flex; align-items: center; gap: 2px; padding: 6px 10px 8px; flex: none; }
.br-toolbar .icon-btn { flex: none; }
.br-omni-field {
  flex: 1 1 auto; min-width: 0; display: flex; align-items: center; gap: 8px;
  height: 36px; padding: 0 12px; margin: 0 6px;
  border-radius: var(--r-full); background: var(--surface-2); border: 1px solid transparent;
  transition: background var(--dur-s), border-color var(--dur-s), box-shadow var(--dur-s);
}
.br-omni-field:hover { background: var(--surface-3); }
.br-omni-field:focus-within { background: var(--surface); border-color: var(--primary); box-shadow: var(--elevation-1); }
.br-omni-field input {
  flex: 1 1 auto; min-width: 0; border: 0; outline: 0; background: transparent;
  color: var(--on-surface); font-family: var(--font-ui); font-size: var(--fs-label);
}
.br-security { display: flex; align-items: center; color: var(--on-surface-3); flex: none; }
.br-security .icon { width: 14px; height: 14px; }
.br-progress { height: 2px; background: transparent; flex: none; }
.br-progress > span { display: block; height: 100%; width: 0; background: var(--primary); transition: width 260ms ease; }
.br-view { flex: 1 1 auto; min-height: 0; background: #fff; position: relative; }
[data-theme="dark"] .br-view { background: #202124; }
.br-view iframe { width: 100%; height: 100%; border: 0; display: block; background: #fff; }

/* ---------- bookmarks bar ---------- */
.br-bmbar {
  display: flex; align-items: center; gap: 2px; padding: 0 8px 6px; flex: none;
  overflow-x: auto; scrollbar-width: none;
}
.br-bmbar::-webkit-scrollbar { display: none; }
.br-bm-item {
  display: flex; align-items: center; gap: 7px; max-width: 190px; padding: 5px 9px; flex: none;
  border: 0; background: transparent; border-radius: var(--r-s); cursor: pointer;
  font-family: var(--font-ui); font-size: var(--fs-caption); color: var(--on-surface-2);
}
.br-bm-item:hover { background: var(--surface-2); }
.br-bm-item.muted { color: var(--on-surface-3); }

/* ---------- omnibox suggestions ---------- */
.br-suggest {
  position: absolute; top: 86px; left: 50%; transform: translateX(-50%);
  width: min(640px, calc(100% - 24px)); max-height: 330px; overflow-y: auto; padding: 6px;
  background: var(--surface); border: 1px solid var(--divider); border-radius: var(--r-m);
  box-shadow: var(--elevation-3); z-index: 20;
}
.br-suggest-row {
  display: flex; align-items: center; gap: 12px; width: 100%; padding: 8px 10px;
  border: 0; background: transparent; border-radius: var(--r-s); cursor: pointer; text-align: left;
  font-family: var(--font-ui);
}
.br-suggest-row:hover, .br-suggest-row.active { background: var(--surface-2); }
.br-suggest-icon {
  width: 18px; height: 18px; flex: none; display: flex; align-items: center; justify-content: center;
  color: var(--on-surface-3);
}
.br-suggest-icon .icon { width: 16px; height: 16px; }

/* ---------- favicons ---------- */
.br-fav { display: inline-flex; align-items: center; justify-content: center; flex: none; }
.br-fav-img { display: block; object-fit: contain; border-radius: 2px; }
.br-fav-letter {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  border-radius: 4px; color: #fff; font-family: var(--font-ui); font-weight: var(--fw-medium); line-height: 1;
}
.br-fav-internal { display: inline-flex; align-items: center; justify-content: center; flex: none; color: var(--primary); }
.br-fav-internal svg { width: 100%; height: 100%; display: block; }
.br-fav-g {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  border-radius: 3px; background: #fff; color: #4285f4;
  font-family: var(--font-ui); font-weight: 700; line-height: 1;
}

/* ---------- start page ---------- */
.br-page { position: absolute; inset: 0; overflow-y: auto; }
.br-newtab {
  display: flex; flex-direction: column; align-items: center; gap: 28px;
  min-height: 100%; padding: 7vh var(--sp-6) var(--sp-8); background: var(--window-bg);
}
.nt-brand { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.nt-mark { display: block; width: 38px; height: 38px; color: var(--primary); }
.nt-mark svg { width: 100%; height: 100%; display: block; }
.nt-name { font-family: var(--font-display); font-size: 24px; letter-spacing: 3px; color: var(--on-surface-2); }
.nt-search { width: min(560px, 100%); height: 46px; padding: 0 18px; }
.br-shortcuts { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--sp-1); width: min(620px, 100%); }
.br-shortcut {
  display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 12px 6px; min-width: 0;
  border: 0; background: transparent; border-radius: var(--r-m); cursor: pointer; font-family: var(--font-ui);
}
.br-shortcut:hover { background: var(--surface-2); }
.br-shortcut .bs-icon {
  width: 46px; height: 46px; border-radius: 50%; background: var(--surface-2);
  display: flex; align-items: center; justify-content: center; color: var(--on-surface-2);
}
.br-shortcut .bs-icon .br-fav-img { border-radius: 6px; }
.br-shortcut .bs-label {
  font-size: var(--fs-caption); color: var(--on-surface-2); text-align: center; line-height: 1.3;
  max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.nt-recent { width: min(620px, 100%); display: flex; flex-direction: column; gap: 2px; }
.nt-recent-head {
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3);
  padding: 0 10px 4px; font-size: var(--fs-label); color: var(--on-surface-3);
}
.nt-recent-row, .br-history-open {
  display: flex; align-items: center; gap: 12px; flex: 1 1 auto; min-width: 0; padding: 8px 10px;
  border: 0; background: transparent; border-radius: var(--r-s); cursor: pointer; text-align: left;
  font-family: var(--font-ui);
}
.nt-recent-row:hover, .br-history-open:hover { background: var(--surface-2); }
.ntr-text { min-width: 0; flex: 1 1 auto; }
.ntr-title { font-size: var(--fs-label); color: var(--on-surface); }
.ntr-url { font-size: var(--fs-caption); color: var(--on-surface-4); }

/* ---------- internal pages ---------- */
.br-page-inner { max-width: 820px; margin: 0 auto; padding: var(--sp-6) var(--sp-6) var(--sp-8); }
.br-h1 {
  font-family: var(--font-display); font-size: 26px; font-weight: var(--fw-regular);
  color: var(--on-surface); margin-bottom: var(--sp-4);
}
.br-page-actions { display: flex; align-items: center; gap: var(--sp-3); margin-bottom: var(--sp-3); }
.br-page-actions .field { flex: 1 1 auto; }
.br-history { display: flex; flex-direction: column; }
.br-history-day { padding: 18px 10px 6px; font-size: var(--fs-label); font-weight: var(--fw-medium); color: var(--on-surface-3); }
.br-history-row { display: flex; align-items: center; gap: 8px; }
.br-history-time { flex: none; font-size: var(--fs-caption); color: var(--on-surface-4); }
.br-http-error {
  max-width: 520px; margin: 10vh auto; text-align: center; color: var(--on-surface-3);
  display: flex; flex-direction: column; gap: var(--sp-4); align-items: center;
}

/* internal page look */
.page { color: var(--on-surface); line-height: 1.7; max-width: 780px; font-size: 14px; }
.page h1 { font-family: var(--font-display); font-weight: var(--fw-regular); font-size: 30px; margin-bottom: var(--sp-3); }
.page h2 { font-size: 18px; margin: var(--sp-6) 0 var(--sp-2); }
.page p { margin-bottom: var(--sp-3); }
.page ul { list-style: disc; padding-left: 22px; margin-bottom: var(--sp-3); }
.page code { font-family: var(--font-mono); background: var(--surface-2); padding: 2px 6px; border-radius: 4px; font-size: 12px; }
.page .hero {
  padding: var(--sp-10); border-radius: var(--r-2xl); margin-bottom: var(--sp-6);
  background: linear-gradient(135deg, var(--primary-container), var(--surface-2));
  text-align: center;
}
.page .hero h1 { margin-bottom: var(--sp-2); }
.page .tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--sp-3); }
.page .tile {
  padding: var(--sp-4); border: 1px solid var(--outline-variant); border-radius: var(--r-l);
  cursor: pointer; background: var(--surface);
}
.page .tile:hover { box-shadow: var(--elevation-2); }

/* ============================== TEXT EDITOR ============================= */
.app-editor { background: var(--window-bg); }
.ed-area-wrap { flex: 1 1 auto; min-height: 0; display: flex; position: relative; overflow: hidden; }
.ed-gutter {
  flex: none; width: 46px; padding: 12px 8px 12px 0; text-align: right;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.55;
  color: var(--on-surface-4); background: var(--surface-1);
  border-right: 1px solid var(--divider); overflow: hidden; user-select: none;
}
.ed-area {
  flex: 1 1 auto; min-width: 0; padding: 12px 14px; border: 0; outline: none; resize: none;
  background: transparent; color: var(--on-surface);
  font-family: var(--font-mono); font-size: 13px; line-height: 1.55;
  white-space: pre; overflow: auto; tab-size: 4;
}
.ed-area.wrap { white-space: pre-wrap; word-break: break-word; }
.ed-area.sans { font-family: var(--font-ui); font-size: 14px; }

/* ============================== CALCULATOR ============================== */
.app-calc { background: var(--window-bg); }
.calc-wrap { flex: 1 1 auto; display: flex; min-height: 0; }
.calc-main { flex: 1 1 auto; display: flex; flex-direction: column; padding: var(--sp-3); min-width: 0; }
.calc-display {
  flex: none; padding: var(--sp-4); text-align: right;
  font-family: var(--font-display);
}
.calc-expr { font-size: var(--fs-label); color: var(--on-surface-3); min-height: 18px; word-break: break-all; }
.calc-value { font-size: 40px; font-weight: var(--fw-regular); word-break: break-all; margin-top: 6px; }
.calc-history {
  flex: none; width: 220px; border-left: 1px solid var(--divider);
  padding: var(--sp-3); overflow-y: auto; background: var(--surface-1);
}
.calc-hist-item { text-align: right; padding: 6px 0; cursor: pointer; border-radius: var(--r-xs); }
.calc-hist-item:hover { background: var(--surface-2); }
.calc-hist-expr { font-size: var(--fs-caption); color: var(--on-surface-3); }
.calc-hist-val { font-size: var(--fs-body); }
.calc-keys { flex: 1 1 auto; display: grid; gap: 6px; grid-template-columns: repeat(4, 1fr); }
.calc-keys.sci { grid-template-columns: repeat(5, 1fr); }
.calc-key {
  border: 0; border-radius: var(--r-m); background: var(--surface-2); color: var(--on-surface);
  font-size: 17px; cursor: pointer; min-height: 48px;
  transition: background var(--dur-s), transform var(--dur-s);
}
.calc-key:hover { background: var(--surface-3); }
.calc-key:active { transform: scale(.96); }
.calc-key.op { background: var(--primary-container); color: var(--on-primary-container); }
.calc-key.eq { background: var(--primary); color: var(--on-primary); }
.calc-key.fn { font-size: 14px; color: var(--on-surface-2); }
.calc-units { padding: var(--sp-4); display: flex; flex-direction: column; gap: var(--sp-3); max-width: 420px; }
.calc-unit-row { display: flex; align-items: center; gap: var(--sp-2); }
.calc-unit-row input, .calc-unit-row select {
  flex: 1 1 auto; min-width: 0; height: 38px; padding: 0 10px; border-radius: var(--r-s);
  border: 1px solid var(--outline); background: var(--surface); outline: none;
}

/* ============================== DIALOG EXTENSIONS ======================= */
.props-grid { display: grid; grid-template-columns: 96px 1fr; gap: 8px 14px; font-size: var(--fs-label); }
.props-grid dt { color: var(--on-surface-3); }
.props-grid dd { margin: 0; word-break: break-word; }
.perm-list { display: flex; flex-direction: column; gap: 2px; }