/* ============================================================
   Reset, typography, shared primitives
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

/* The `hidden` attribute must win over later display rules. */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}

body {
  font-family: var(--font-ui);
  font-size: var(--fs-md);
  font-weight: 400;
  line-height: var(--lh-body);
  color: var(--c-fg);
  background: #111;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}
button { background: none; border: 0; cursor: pointer; padding: 0; }
button:disabled { cursor: default; }

h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 500; line-height: var(--lh-tight); }
p { margin: 0 0 .6em; }
p:last-child { margin-bottom: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

kbd {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 500;
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--c-hover);
  border: 1px solid var(--c-border);
  border-bottom-width: 2px;
  white-space: nowrap;
  color: var(--c-fg-secondary);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}
:focus:not(:focus-visible) { outline: none; }

::selection { background: color-mix(in srgb, var(--accent) 40%, transparent); }

/* ---- Scrollbars (GNOME style: thin, overlay-ish) ----------- */
* { scrollbar-width: thin; scrollbar-color: var(--c-scrollbar) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--c-scrollbar);
  border-radius: 8px;
  border: 3px solid transparent;
  background-clip: padding-box;
  min-height: 28px;
}
::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--c-scrollbar) 60%, var(--c-fg)); background-clip: padding-box; }
::-webkit-scrollbar-corner { background: transparent; }

/* ---- Utility --------------------------------------------- */
.ud-hidden { display: none !important; }
.ud-vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.ud-ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ud-noscroll { overflow: hidden !important; }

svg { display: block; }

/* ---- Circular icon button (used everywhere in GNOME) ------ */
.circ-btn {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  flex: 0 0 auto;
  color: var(--c-fg-secondary);
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease, scale var(--dur-fast) var(--ease-snap);
}
.circ-btn:hover { background: var(--c-hover); color: var(--c-fg); }
.circ-btn:active { scale: .94; background: var(--c-active); }
.circ-btn[disabled] { opacity: .4; }
.circ-btn.is-active { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--c-selected-fg); }
.circ-btn svg { width: 16px; height: 16px; }
.circ-btn.sm { width: 28px; height: 28px; }
.circ-btn.sm svg { width: 14px; height: 14px; }
.circ-btn.lg { width: 42px; height: 42px; }
.circ-btn.lg svg { width: 20px; height: 20px; }

/* ---- GNOME pill button ----------------------------------- */
.pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-border);
  background: var(--c-card-bg);
  color: var(--c-fg);
  font-weight: 500;
  font-size: var(--fs-md);
  white-space: nowrap;
  transition: background var(--dur-fast) ease, border-color var(--dur-fast) ease, scale var(--dur-fast) var(--ease-snap);
}
.pill-btn:hover { background: var(--c-hover); border-color: var(--c-border-strong); }
.pill-btn:active { scale: .97; background: var(--c-active); }
.pill-btn[disabled] { opacity: .5; cursor: default; }
.pill-btn.suggested {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: transparent;
  font-weight: 700;
}
.pill-btn.suggested:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.pill-btn.destructive { background: var(--c-danger); color: #fff; border-color: transparent; font-weight: 700; }
.pill-btn.destructive:hover { background: color-mix(in srgb, var(--c-danger) 88%, #000); }
.pill-btn.sm { height: 28px; padding: 0 12px; font-size: var(--fs-sm); }

/* ---- GNOME list box / rows ------------------------------- */
.listbox {
  background: var(--c-card-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-tile);
  overflow: hidden;
}
.listbox > .row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 0 12px;
  border-bottom: 1px solid var(--c-border);
}
.listbox > .row:last-child { border-bottom: 0; }
.listbox > .row.clickable { cursor: pointer; }
.listbox > .row.clickable:hover { background: var(--c-hover); }
.listbox > .row .row-title { flex: 1; min-width: 0; }
.listbox > .row .row-sub { color: var(--c-fg-muted); font-size: var(--fs-sm); }

/* ---- Switch ---------------------------------------------- */
.switch {
  position: relative;
  flex: 0 0 auto;
  width: 46px;
  height: 26px;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--c-fg) 20%, transparent);
  border: 1px solid var(--c-border-strong);
  transition: background var(--dur) ease, border-color var(--dur) ease;
  padding: 0;
}
.switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--c-card-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .35);
  transition: transform var(--dur) var(--ease-snap);
}
.switch[aria-checked="true"] { background: var(--accent); border-color: transparent; }
.switch[aria-checked="true"]::after { transform: translateX(20px); }

/* ---- Slider ---------------------------------------------- */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
.slider::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--c-fg) 14%, transparent);
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -6px;
  border-radius: 50%;
  background: var(--c-fg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
  border: 0;
}
.slider::-moz-range-track { height: 6px; border-radius: 3px; background: color-mix(in srgb, var(--c-fg) 14%, transparent); }
.slider::-moz-range-thumb { width: 18px; height: 18px; border: 0; border-radius: 50%; background: var(--c-fg); }
.slider.accent::-webkit-slider-thumb { background: var(--accent); }
.slider.accent::-moz-range-thumb { background: var(--accent); }
.slider[disabled] { opacity: .5; cursor: default; }

/* ---- Segmented control ----------------------------------- */
.segmented {
  display: inline-flex;
  padding: 2px;
  gap: 2px;
  background: color-mix(in srgb, var(--c-fg) 8%, transparent);
  border-radius: var(--radius-pill);
}
.segmented button {
  border-radius: var(--radius-pill);
  padding: 0 14px;
  height: 28px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-fg-secondary);
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease;
}
.segmented button:hover { color: var(--c-fg); }
.segmented button[aria-pressed="true"] {
  background: var(--c-card-bg);
  color: var(--c-fg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .18);
}

/* ---- Entry ----------------------------------------------- */
.entry {
  height: 34px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-border-strong);
  background: var(--c-view-bg);
  color: var(--c-fg);
  width: 100%;
  transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}
.entry::placeholder { color: var(--c-fg-disabled); }
.entry:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent); }

/* ---- Combo / select -------------------------------------- */
.select {
  height: 34px;
  padding: 0 30px 0 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-border-strong);
  background: var(--c-view-bg);
  color: var(--c-fg);
  appearance: none;
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 15px) 15px, calc(100% - 11px) 15px;
  background-size: 4px 4px, 4px 4px;
  background-repeat: no-repeat;
}
.select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent); }

/* ---- Sidebar row (GNOME) --------------------------------- */
.side-row {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 34px;
  padding: 0 8px;
  border-radius: 6px;
  color: var(--c-fg-secondary);
  font-size: var(--fs-md);
  width: 100%;
  text-align: left;
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease;
}
.side-row:hover { background: var(--c-hover); color: var(--c-fg); }
.side-row[aria-selected="true"], .side-row.is-active {
  background: color-mix(in srgb, var(--accent) 17%, transparent);
  color: var(--c-selected-fg);
  font-weight: 500;
}
.side-row svg { width: 16px; height: 16px; flex: 0 0 auto; }
.side-row .side-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---- Spinner --------------------------------------------- */
.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--c-fg) 25%, transparent);
  border-top-color: var(--accent);
  animation: ud-spin 800ms linear infinite;
  flex: 0 0 auto;
}
.spinner.lg { width: 32px; height: 32px; border-width: 3px; }

/* ---- Badge ------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}

/* ---- Empty state ------------------------------------------ */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  height: 100%;
  padding: 32px;
  text-align: center;
  color: var(--c-fg-muted);
}
.empty-state .empty-icon { opacity: .32; }
.empty-state .empty-icon svg { width: 72px; height: 72px; }
.empty-state .empty-title { font-size: var(--fs-lg); font-weight: 500; color: var(--c-fg-secondary); }
.empty-state .empty-sub { font-size: var(--fs-md); max-width: 34ch; }

/* ---- Progress bar ------------------------------------------ */
.progress {
  height: 6px;
  border-radius: 3px;
  background: color-mix(in srgb, var(--c-fg) 12%, transparent);
  overflow: hidden;
}
.progress > i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 3px;
  background: var(--accent);
  transition: width 220ms var(--ease-window);
}

/* ---- Tooltip ----------------------------------------------- */
.tooltip-layer { position: fixed; inset: 0; pointer-events: none; z-index: var(--z-tooltip); }
.tooltip {
  position: absolute;
  max-width: 260px;
  padding: 5px 10px;
  border-radius: 7px;
  background: var(--c-tooltip-bg);
  color: var(--c-tooltip-fg);
  font-size: var(--fs-sm);
  line-height: 1.35;
  box-shadow: 0 3px 12px rgba(0, 0, 0, .4);
  transform-origin: left center;
  animation: ud-tip-in 120ms var(--ease-shell) both;
}
.tooltip.right { transform-origin: right center; }
.tooltip .tip-sub { opacity: .7; font-size: var(--fs-xs); }