/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Design tokens ──────────────────────────────────────────────────────── */
:root {
  /* Surfaces */
  --bg:           #f2f2f7;
  --surface:      rgba(255, 255, 255, 0.82);
  --surface-2:    rgba(116, 116, 128, 0.10);
  --surface-3:    rgba(116, 116, 128, 0.06);

  /* Text */
  --text:         #1c1c1e;
  --text-2:       rgba(60, 60, 67, 0.55);
  --text-3:       rgba(60, 60, 67, 0.30);

  /* Accent */
  --accent:       #007aff;
  --accent-dim:   rgba(0, 122, 255, 0.12);
  --accent-hover: #0071eb;

  /* Semantic */
  --success:      #34c759;
  --danger:       #ff3b30;
  --warning:      #ff9500;

  /* Structure */
  --border:       rgba(60, 60, 67, 0.13);
  --radius-sm:    10px;
  --radius:       16px;
  --radius-lg:    20px;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:       0 4px 20px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.05);
  --shadow-lg:    0 12px 40px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);

  /* Motion */
  --dur:          220ms;
  --ease:         cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --spring:       cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Font */
  --font:         -apple-system, BlinkMacSystemFont, "Segoe UI Variable",
                  "Segoe UI", system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg:           #000000;
  --surface:      rgba(28, 28, 30, 0.90);
  --surface-2:    rgba(118, 118, 128, 0.22);
  --surface-3:    rgba(118, 118, 128, 0.12);
  --text:         #f5f5f7;
  --text-2:       rgba(235, 235, 245, 0.55);
  --text-3:       rgba(235, 235, 245, 0.22);
  --accent:       #0a84ff;
  --accent-dim:   rgba(10, 132, 255, 0.16);
  --accent-hover: #1a8fff;
  --border:       rgba(84, 84, 88, 0.55);
  --shadow-sm:    0 1px 3px rgba(0,0,0,.25), 0 1px 2px rgba(0,0,0,.18);
  --shadow:       0 4px 20px rgba(0,0,0,.40), 0 1px 4px rgba(0,0,0,.25);
  --shadow-lg:    0 12px 40px rgba(0,0,0,.55), 0 2px 8px rgba(0,0,0,.35);
}

/* ── Smooth theme transition ────────────────────────────────────────────── */
*, *::before, *::after {
  transition:
    background-color 350ms var(--ease),
    border-color     350ms var(--ease),
    box-shadow       350ms var(--ease),
    color            350ms var(--ease);
}

/* Exclude elements where transitions look bad */
button, input, .progress-fill, .log-entry, .cat-tile {
  transition: none;
}

/* ── Base ───────────────────────────────────────────────────────────────── */
html, body { height: 100%; }

body {
  font-family:      var(--font);
  font-size:        15px;
  color:            var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* ── App shell ──────────────────────────────────────────────────────────── */
.app {
  display:        flex;
  flex-direction: column;
  height:         100vh;
  overflow:       hidden;
}

/* ── Titlebar ───────────────────────────────────────────────────────────── */
.titlebar {
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  gap:             16px;
  padding:         14px 20px 14px 16px;
  background:      var(--surface);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom:   1px solid var(--border);
  position:        sticky;
  top:             0;
  z-index:         100;
  flex-shrink:     0;
  user-select:     none;
  -webkit-app-region: drag;
  app-region:         drag;
}

.titlebar button, .titlebar a {
  -webkit-app-region: no-drag;
  app-region:         no-drag;
}

/* ── Titlebar left ──────────────────────────────────────────────────────── */
.titlebar-left {
  display:     flex;
  align-items: center;
  gap:         12px;
  flex:        1;
  min-width:   0;
}

.app-icon {
  font-size:   32px;
  line-height: 1;
  filter:      drop-shadow(0 2px 4px rgba(0,0,0,.15));
  flex-shrink: 0;
}

.app-meta {
  display:        flex;
  flex-direction: column;
  gap:            1px;
}

.app-name {
  font-size:   22px;
  font-weight: 700;
  letter-spacing: -0.4px;
  line-height: 1.2;
}

.app-sub {
  font-size:  12px;
  color:      var(--text-2);
  letter-spacing: 0.1px;
}

/* ── Theme toggle ───────────────────────────────────────────────────────── */
.theme-btn {
  display:       flex;
  align-items:   center;
  gap:           6px;
  padding:       7px 14px;
  border:        1px solid var(--border);
  border-radius: 999px;
  background:    var(--surface-2);
  color:         var(--text);
  font-size:     13px;
  font-weight:   500;
  font-family:   var(--font);
  cursor:        pointer;
  transition:    background var(--dur) var(--ease),
                 transform  120ms var(--spring),
                 box-shadow var(--dur) var(--ease);
  outline:       none;
}

.theme-btn:hover  { background: var(--surface-2); box-shadow: var(--shadow-sm); }
.theme-btn:active { transform: scale(0.96); }

.theme-icon { font-size: 15px; }
.theme-label { color: var(--text-2); }

/* ── Content ────────────────────────────────────────────────────────────── */
.content {
  flex:       1;
  min-height: 0;        /* critical: lets flex child actually scroll */
  overflow-y: auto;
  padding:    20px 28px 32px;
  display:    flex;
  flex-direction: column;
  gap:        14px;
  scroll-behavior: smooth;
}

.content::-webkit-scrollbar { width: 6px; }
.content::-webkit-scrollbar-track { background: transparent; }
.content::-webkit-scrollbar-thumb {
  background:    var(--border);
  border-radius: 999px;
}

/* ── Card ───────────────────────────────────────────────────────────────── */
.card {
  background:      var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border:          1px solid var(--border);
  border-radius:   var(--radius-lg);
  box-shadow:      var(--shadow);
  overflow:        hidden;
  animation:       cardIn 380ms var(--ease) both;
}

.card:nth-child(2) { animation-delay: 60ms; }
.card:nth-child(3) { animation-delay: 120ms; }

@keyframes cardIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0);    }
}

.log-card {
  display:        flex;
  flex-direction: column;
  min-height:     220px;
  flex:           1;
}

/* ── Card header ────────────────────────────────────────────────────────── */
.card-header {
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  padding:         18px 20px 12px;
}

.section-title {
  font-size:      16px;
  font-weight:    650;
  letter-spacing: -0.2px;
}

/* ── Shortcut buttons ───────────────────────────────────────────────────── */
.shortcut-row {
  display: flex;
  gap:     8px;
  padding: 0 16px 10px;
  flex-wrap: wrap;
}

.shortcut-btn {
  display:       flex;
  align-items:   center;
  gap:           6px;
  padding:       9px 16px;
  border:        1px solid var(--border);
  border-radius: var(--radius-sm);
  background:    var(--surface-2);
  color:         var(--text);
  font-size:     13px;
  font-weight:   500;
  font-family:   var(--font);
  cursor:        pointer;
  outline:       none;
  transition:    background   var(--dur) var(--ease),
                 border-color var(--dur) var(--ease),
                 box-shadow   var(--dur) var(--ease),
                 transform    120ms var(--spring);
  flex:          1;
  justify-content: center;
  white-space:   nowrap;
}

.shortcut-btn:hover {
  background:   var(--accent-dim);
  border-color: var(--accent);
  color:        var(--accent);
  box-shadow:   var(--shadow-sm);
}

.shortcut-btn:active { transform: scale(0.96); }

.shortcut-icon { font-size: 16px; }

/* ── Folder display ─────────────────────────────────────────────────────── */
.folder-display {
  display:     flex;
  align-items: center;
  gap:         8px;
  padding:     10px 16px 16px;
  margin:      0 4px;
}

.fd-icon { font-size: 15px; flex-shrink: 0; }

.fd-path {
  flex:          1;
  font-size:     12.5px;
  color:         var(--text-2);
  overflow:      hidden;
  text-overflow: ellipsis;
  white-space:   nowrap;
  min-width:     0;
}

.fd-path.active { color: var(--text); font-weight: 500; }

.fd-open {
  display:       flex;
  align-items:   center;
  justify-content: center;
  width:         28px;
  height:        28px;
  border:        1px solid var(--border);
  border-radius: 8px;
  background:    var(--surface-2);
  color:         var(--text-2);
  cursor:        pointer;
  transition:    background var(--dur) var(--ease),
                 color      var(--dur) var(--ease),
                 transform  120ms var(--spring);
  flex-shrink:   0;
  outline:       none;
}

.fd-open svg { width: 14px; height: 14px; }
.fd-open:hover  { background: var(--accent-dim); color: var(--accent); }
.fd-open:active { transform: scale(0.90); }

/* ── Categories grid ────────────────────────────────────────────────────── */
.cat-grid {
  display:               grid;
  grid-template-columns: repeat(4, 1fr);
  gap:                   8px;
  padding:               0 16px 12px;
}

@media (max-width: 700px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Category tile ──────────────────────────────────────────────────────── */
.cat-tile {
  display:        flex;
  flex-direction: column;
  gap:            4px;
  padding:        12px 14px;
  border:         1.5px solid var(--border);
  border-radius:  var(--radius-sm);
  background:     var(--surface-3);
  cursor:         pointer;
  transition:     background   var(--dur) var(--ease),
                  border-color var(--dur) var(--ease),
                  box-shadow   var(--dur) var(--ease),
                  transform    140ms var(--spring);
  user-select:    none;
  outline:        none;
}

.cat-tile:hover {
  background:  var(--surface-2);
  box-shadow:  var(--shadow-sm);
  transform:   translateY(-2px);
}

.cat-tile:active { transform: translateY(0) scale(0.97); }

.cat-tile.checked {
  border-color: var(--tile-color, var(--accent));
  background:   color-mix(in srgb, var(--tile-color, var(--accent)) 8%, transparent);
}

[data-theme="dark"] .cat-tile.checked {
  background: color-mix(in srgb, var(--tile-color, var(--accent)) 12%, transparent);
}

.tile-top {
  display:     flex;
  align-items: center;
  gap:         7px;
}

.tile-icon   { font-size: 18px; line-height: 1; }
.tile-name   { font-size: 13px; font-weight: 600; flex: 1; }

.tile-check {
  width:         16px;
  height:        16px;
  border:        1.5px solid var(--border);
  border-radius: 5px;
  background:    var(--surface);
  display:       flex;
  align-items:   center;
  justify-content: center;
  flex-shrink:   0;
  transition:    background   180ms var(--ease),
                 border-color 180ms var(--ease);
}

.cat-tile.checked .tile-check {
  background:   var(--tile-color, var(--accent));
  border-color: var(--tile-color, var(--accent));
}

.tile-check-mark {
  width:   8px;
  height:  8px;
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 180ms var(--ease), transform 200ms var(--spring);
}

.cat-tile.checked .tile-check-mark {
  opacity:   1;
  transform: scale(1);
}

.tile-exts {
  font-size: 10.5px;
  color:     var(--text-3);
  letter-spacing: 0.2px;
  padding-left: 2px;
}

/* ── Select All ─────────────────────────────────────────────────────────── */
.check-label {
  display:     flex;
  align-items: center;
  gap:         7px;
  cursor:      pointer;
  font-size:   13px;
  color:       var(--text-2);
  user-select: none;
}

.check-label input { display: none; }

.check-box {
  width:         16px;
  height:        16px;
  border:        1.5px solid var(--border);
  border-radius: 5px;
  background:    var(--surface);
  display:       inline-flex;
  align-items:   center;
  justify-content: center;
  transition:    background   180ms var(--ease),
                 border-color 180ms var(--ease);
  flex-shrink:   0;
}

.check-box::after {
  content:    '';
  display:    block;
  width:      8px;
  height:     8px;
  background: white url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10'%3E%3Cpath d='M2 5l2.5 2.5L8 3' stroke='white' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
  opacity:    0;
  transform:  scale(0.4);
  transition: opacity 160ms, transform 200ms var(--spring);
}

.check-label:has(input:checked) .check-box {
  background:   var(--accent);
  border-color: var(--accent);
}

.check-label:has(input:checked) .check-box::after {
  opacity:   1;
  transform: scale(1);
}

/* ── Action row ─────────────────────────────────────────────────────────── */
.action-row {
  display: flex;
  gap:     10px;
  padding: 4px 16px 16px;
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display:       inline-flex;
  align-items:   center;
  justify-content: center;
  gap:           7px;
  padding:       10px 20px;
  border-radius: var(--radius-sm);
  font-family:   var(--font);
  font-size:     14px;
  font-weight:   600;
  cursor:        pointer;
  outline:       none;
  border:        none;
  transition:    background  var(--dur) var(--ease),
                 box-shadow  var(--dur) var(--ease),
                 opacity     var(--dur) var(--ease),
                 transform   120ms var(--spring);
  white-space:   nowrap;
}

.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn:active:not(:disabled) { transform: scale(0.96); }

.btn:disabled {
  opacity: 0.4;
  cursor:  not-allowed;
}

.btn-primary {
  flex:       1;
  background: var(--accent);
  color:      #fff;
  box-shadow: 0 2px 8px rgba(0,122,255,.28);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 16px rgba(0,122,255,.38);
}

.btn-ghost {
  background:  var(--surface-2);
  color:       var(--text);
  border:      1px solid var(--border);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--surface-2);
  box-shadow: var(--shadow-sm);
}

.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-sm svg { width: 14px; height: 14px; }

/* ── Progress ───────────────────────────────────────────────────────────── */
.progress-wrap {
  display:    flex;
  flex-direction: column;
  gap:        6px;
  padding:    4px 16px 16px;
  animation:  fadeIn 200ms var(--ease);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.progress-track {
  height:        6px;
  border-radius: 999px;
  background:    var(--surface-2);
  overflow:      hidden;
}

.progress-fill {
  height:        100%;
  border-radius: 999px;
  background:    linear-gradient(90deg, var(--accent) 0%, #5ac8fa 50%, var(--accent) 100%);
  background-size: 200% 100%;
  width:         0%;
  animation:     shimmer 1.8s linear infinite;
  transition:    width 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes shimmer {
  from { background-position:  200% 0; }
  to   { background-position: -200% 0; }
}

.progress-fill.done {
  background:    var(--success);
  animation:     none;
  transition:    width 400ms cubic-bezier(0.4, 0, 0.2, 1),
                 background 300ms var(--ease);
}

.progress-label {
  font-size: 12px;
  color:     var(--text-2);
}

/* ── Log ────────────────────────────────────────────────────────────────── */
.log-btns {
  display: flex;
  gap:     8px;
}

.log-body {
  flex:       1;
  overflow-y: auto;
  padding:    0 16px 16px;
  display:    flex;
  flex-direction: column;
  gap:        3px;
}

.log-body::-webkit-scrollbar { width: 4px; }
.log-body::-webkit-scrollbar-thumb {
  background:    var(--border);
  border-radius: 999px;
}

/* ── Log entry ──────────────────────────────────────────────────────────── */
.log-entry {
  display:     flex;
  align-items: flex-start;
  gap:         8px;
  padding:     5px 10px;
  border-radius: 8px;
  font-size:   12.5px;
  line-height: 1.5;
  animation:   logIn 180ms var(--ease) both;
}

@keyframes logIn {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0);     }
}

.log-entry:hover { background: var(--surface-2); }

.log-icon  { flex-shrink: 0; font-size: 13px; margin-top: 1px; }
.log-text  { flex: 1; color: var(--text); word-break: break-all; }
.log-cat   { color: var(--text-2); flex-shrink: 0; }

.log-info   .log-text { color: var(--text-2); font-style: italic; }
.log-error  .log-text { color: var(--danger); }
.log-done   .log-text { color: var(--success); font-weight: 600; }
.log-undo   .log-text { color: var(--warning); font-weight: 600; }

/* ── Preview panel (inside log) ─────────────────────────────────────────── */
.preview-group {
  border:        1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow:      hidden;
  margin-bottom: 4px;
  animation:     cardIn 250ms var(--ease) both;
}

.preview-group-header {
  display:     flex;
  align-items: center;
  gap:         8px;
  padding:     9px 14px;
  background:  var(--surface-2);
  font-size:   13px;
  font-weight: 600;
  cursor:      pointer;
  user-select: none;
  transition:  background var(--dur) var(--ease);
}

.preview-group-header:hover { background: var(--surface-2); }

.preview-group-header .ph-icon  { font-size: 15px; }
.preview-group-header .ph-count {
  margin-left: auto;
  font-size:   12px;
  font-weight: 500;
  color:       var(--text-2);
  background:  var(--surface);
  border:      1px solid var(--border);
  padding:     1px 8px;
  border-radius: 999px;
}

.preview-group-files {
  padding: 6px 14px 10px 38px;
}

.preview-file {
  font-size:  12px;
  color:      var(--text-2);
  padding:    2px 0;
  word-break: break-all;
}

.preview-more {
  font-size:   11.5px;
  color:       var(--text-3);
  padding-top: 2px;
  font-style:  italic;
}

/* ── Titlebar right group ───────────────────────────────────────────────── */
.titlebar-right {
  display:     flex;
  align-items: center;
  gap:         8px;
  flex-shrink: 0;
  -webkit-app-region: no-drag;
  app-region:         no-drag;
}

/* ── Install button ─────────────────────────────────────────────────────── */
.install-btn {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color:      var(--accent);
  border:     1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.install-btn:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  box-shadow: var(--shadow-sm);
}

/* ── Electron / WCO: native title bar removed, OS provides min/max/close ─── */
/* Applied via .electron-app class (injected by main.js) or WCO media query  */

@media (display-mode: window-controls-overlay) {
  .titlebar { --no-native-bar: 1; }
}

.electron-app .titlebar,
.electron-app .app-sub           { --no-native-bar: 1; }

/* Titlebar becomes the WCO overlay strip */
.electron-app .titlebar {
  position:      fixed;
  top:           env(titlebar-area-y,      0);
  left:          env(titlebar-area-x,      0);
  width:         env(titlebar-area-width,  100%);
  height:        env(titlebar-area-height, 44px);
  padding:       0 12px;
  border-bottom: none;
  z-index:       9999;
}

@media (display-mode: window-controls-overlay) {
  .titlebar {
    position:      fixed;
    top:           env(titlebar-area-y,      0);
    left:          env(titlebar-area-x,      0);
    width:         env(titlebar-area-width,  100%);
    height:        env(titlebar-area-height, 44px);
    padding:       0 12px;
    border-bottom: none;
    z-index:       9999;
  }
}

/* Compact content for the narrow strip */
.electron-app .app-sub { display: none; }
.electron-app .app-icon { font-size: 22px; }
.electron-app .app-name { font-size: 16px; }
.electron-app .theme-label { display: none; }
.electron-app .theme-btn { padding: 5px 10px; }
.electron-app .install-btn { display: none; }

/* Push scrollable content below the fixed titlebar */
.electron-app .content {
  padding-top: calc(env(titlebar-area-height, 44px) + 20px);
}

@media (display-mode: window-controls-overlay) {
  .app-sub    { display: none; }
  .app-icon   { font-size: 22px; }
  .app-name   { font-size: 16px; }
  .theme-label { display: none; }
  .theme-btn  { padding: 5px 10px; }
  .install-btn { display: none; }
  .content {
    padding-top: calc(env(titlebar-area-height, 44px) + 20px);
  }
}

/* ── Responsive: narrow window ──────────────────────────────────────────── */
@media (max-width: 560px) {
  .content { padding: 12px 14px 24px; gap: 10px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); padding: 0 12px 10px; }
  .shortcut-row { padding: 0 12px 8px; }
  .card-header  { padding: 14px 14px 8px; }
  .action-row   { padding: 4px 12px 12px; }
}

/* ── Responsive: short window ────────────────────────────────────────────── */
@media (max-height: 680px) {
  .content    { gap: 10px; padding-top: 14px; padding-bottom: 20px; }
  .card-header { padding: 12px 20px 6px; }
  .cat-tile   { padding: 9px 12px; }
  .log-card   { min-height: 140px; }
}

@media (max-height: 520px) {
  .tile-exts  { display: none; }
  .cat-tile   { padding: 7px 10px; }
  .shortcut-btn { padding: 6px 10px; font-size: 12px; }
  .log-card   { min-height: 80px; }
}

/* ── Utility ────────────────────────────────────────────────────────────── */
[hidden] { display: none !important; }