:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1b1f24;
  --ink-soft: #6b7280;
  --line: #e3e6ea;
  --accent: #2f6fed;
  --accent-soft: #e8f0fe;
  --danger: #c0392b;
  --chip: #f2f4f7;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.45 "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}

/* ---------- top bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  letter-spacing: .5px;
}

.brand h1 { margin: 0; font-size: 16px; font-weight: 650; }
.brand-sub { margin: 0; font-size: 12px; color: var(--ink-soft); }

.features { display: flex; gap: 6px; }

.feature {
  padding: 7px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  cursor: pointer;
}

.tab-count {
  display: inline-block;
  min-width: 20px;
  margin-inline-start: 6px;
  padding: 1px 6px;
  border-radius: 999px;
  background: #eef0f3;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-soft);
}

.feature.is-active .tab-count { background: #d6e4fd; color: var(--accent); }

.btn-go {
  background: #1f8a4c;
  border-color: #1f8a4c;
  color: #fff;
  font-weight: 600;
}

.btn-go:hover:not(:disabled) { background: #1a7742; border-color: #1a7742; }
.btn-go:disabled { background: #e8eaed; border-color: var(--line); color: #a4abb5; cursor: default; }

.feature.is-active {
  background: var(--accent-soft);
  border-color: #cfe0fd;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- toolbar ---------- */

main { padding: 20px 24px 64px; max-width: 1400px; margin: 0 auto; }

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.toolbar-group { display: flex; align-items: center; gap: 8px; }
.toolbar-right { margin-left: auto; }

#filter {
  width: 280px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font: inherit;
}

#filter:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

.field { display: flex; align-items: center; gap: 6px; }

.field-label { font-size: 12px; color: var(--ink-soft); }

#sort, #pageSize, #aiModel {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font: inherit;
  color: var(--ink);
  cursor: pointer;
}

#sort:focus, #pageSize:focus, #aiModel:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}


#dir { font-variant-numeric: tabular-nums; min-width: 62px; }
#dir[aria-pressed="true"] { background: var(--accent-soft); border-color: #cfe0fd; color: var(--accent); }

.stats { font-size: 12px; color: var(--ink-soft); }

.save-state {
  font-size: 12px;
  color: var(--ink-soft);
  min-width: 92px;
  text-align: right;
}

.btn {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { border-color: #c9ced6; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.btn-primary:hover { background: #2a63d6; }

.btn-ghost { background: transparent; color: var(--ink-soft); }

/* ---------- groups ---------- */

.groups { display: flex; flex-direction: column; gap: 10px; }

.group {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.group.dragging { opacity: .45; }
.group.drop-target { border-color: var(--accent); }

/* Edited while filtering, and no longer matching — held in place rather than
   yanked out from under the cursor. */
.group.is-kept { border-style: dashed; border-color: #c2c8d0; }

.group.is-selected {
  background: #f4f9ff;
  box-shadow: inset 3px 0 0 var(--accent), var(--shadow);
}

[dir="rtl"] .group.is-selected { box-shadow: inset -3px 0 0 var(--accent), var(--shadow); }

.select {
  width: 16px;
  height: 16px;
  margin: 0 2px;
  accent-color: var(--accent);
  cursor: pointer;
  flex: none;
}

.group-head {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 300px;
  padding-top: 2px;
}

.group-name {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  font: 600 14px/1.3 inherit;
  color: var(--ink);
}

.group-name:hover { border-color: var(--line); }
.group-name:focus { outline: none; border-color: var(--accent); background: #fff; }

.count {
  font-size: 11px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.difficulty {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink-soft);
  font: 11px/1 inherit;
  padding: 4px 2px;
  cursor: pointer;
}

.difficulty:focus { outline: none; border-color: var(--accent); }

/* Warmer as the difficulty climbs, so a sorted list reads at a glance. */
.difficulty[data-level="1"] { background: #eaf7ee; color: #1e7a3c; border-color: #c9e8d4; }
.difficulty[data-level="2"] { background: #eef5e6; color: #4a7a1e; border-color: #d7e7c4; }
.difficulty[data-level="3"] { background: #fdf4e3; color: #96660d; border-color: #f0dfba; }
.difficulty[data-level="4"] { background: #fdeee3; color: #a2530f; border-color: #f2d5bd; }
.difficulty[data-level="5"] { background: #fdeaea; color: #a32b23; border-color: #f2c7c4; }

.drag-handle:disabled { opacity: .25; cursor: default; }
.drag-handle:disabled:hover { background: transparent; color: #b3b9c2; }

/* words live on the same line as the group name, wrapping as needed */
.words {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
  min-height: 34px;
  padding: 2px 0;
}

.word {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px 4px 3px 6px;
  background: var(--chip);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: grab;
}

.word:hover { border-color: #cfd4dc; }
.word.dragging { opacity: .4; }
/* The insertion marker follows the reading direction, so it mirrors in RTL. */
.word.drop-before { box-shadow: -3px 0 0 var(--accent); }
.word.drop-after { box-shadow: 3px 0 0 var(--accent); }

[dir="rtl"] .word.drop-before { box-shadow: 3px 0 0 var(--accent); }
[dir="rtl"] .word.drop-after { box-shadow: -3px 0 0 var(--accent); }

.word-grip { color: #b3b9c2; font-size: 11px; cursor: grab; }

.word-input {
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  font: inherit;
  color: var(--ink);
  padding: 2px 4px;
  min-width: 24px;
}

.word-input:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  cursor: text;
}

.word.match { background: #fff6d8; border-color: #f0dca0; }

.icon-btn {
  border: none;
  background: transparent;
  color: #9aa1ac;
  font: inherit;
  line-height: 1;
  padding: 3px 4px;
  border-radius: 5px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none; /* a button you cannot see must not be clickable */
}

.word:hover .icon-btn,
.word:focus-within .icon-btn,
.group-head:hover .icon-btn { opacity: 1; pointer-events: auto; }

.icon-btn:hover { background: #e6e9ee; color: var(--ink); }
.icon-btn.danger:hover { background: #fdeceb; color: var(--danger); }

.add-word {
  border: 1px dashed #c7ccd4;
  background: transparent;
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 4px 12px;
  font: inherit;
  cursor: pointer;
}

.add-word:hover { border-color: var(--accent); color: var(--accent); }

.drag-handle {
  border: none;
  background: transparent;
  color: #b3b9c2;
  cursor: grab;
  font-size: 12px;
  padding: 4px 2px;
  border-radius: 5px;
}

.drag-handle:hover { background: #eef0f3; color: var(--ink); }

/* ---------- pager ---------- */

.pager {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 2px;
}

#pagerBottom { padding-top: 16px; }

.pager-btn {
  min-width: 34px;
  padding: 6px 10px;
  font-size: 15px;
  line-height: 1;
}

.pager-btn:disabled { opacity: .35; cursor: default; }
.pager-btn:disabled:hover { border-color: var(--line); }

.pager-jump { display: flex; align-items: center; gap: 6px; margin-inline: 6px; }

.pager-jump input {
  width: 62px;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font: inherit;
  color: var(--ink);
  text-align: center;
}

.pager-jump input:focus { outline: none; border-color: var(--accent); }

.pager-of { font-size: 12px; color: var(--ink-soft); }

.pager-range {
  margin-inline-start: auto;
  font-size: 12px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.empty {
  padding: 40px;
  text-align: center;
  color: var(--ink-soft);
  background: var(--panel);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}

@media (max-width: 800px) {
  .group { flex-direction: column; }
  .group-head { flex: 1 1 auto; width: 100%; }
}

/* ---------- sign-in ---------- */

.authbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-inline-start: auto;
}

.auth-who { font-size: 12px; color: var(--ink-soft); }

/* ---------- AI suggestions ---------- */

.suggest { color: #8a6fd1; }
.suggest:hover { background: #f0ebfb; }

.suggest.is-busy {
  opacity: 1 !important;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse { 50% { opacity: .35; } }

.suggestions {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-inline-start: 8px;
  margin-inline-start: 4px;
  border-inline-start: 2px dotted #cbbdf0;
}

.suggestion {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px 4px 3px 8px;
  border: 1px dashed #b9a6e8;
  border-radius: 999px;
  background: #f7f4fe;
  cursor: help;
}

.suggestion-word { color: #4a3b74; }

.suggestion .icon-btn { opacity: 1; pointer-events: auto; }
.suggestion-add { color: #2f8a4c; font-weight: 700; }
.suggestion-add:hover { background: #dff2e5; color: #1a7742; }
.suggestion-drop:hover { background: #f0ebfb; }

.suggestion-all {
  padding: 4px 10px;
  border: 1px solid #b9a6e8;
  border-radius: 999px;
  background: #efe9fc;
  color: #4a3b74;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.suggestion-all:hover { background: #e3d9fa; }

/* ---------- home ---------- */

.home { max-width: 900px; margin: 0 auto; padding: 24px 0 64px; }

.home-title { margin: 0 0 4px; font-size: 20px; font-weight: 650; }
.home-sub { margin: 0 0 28px; color: var(--ink-soft); font-size: 13px; }

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.lang-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.lang-card-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--line);
}

.lang-card-name { font-size: 18px; font-weight: 650; }
.lang-card-sub { font-size: 12px; color: var(--ink-soft); }

.lang-links { display: flex; flex-direction: column; }

.lang-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 18px;
  border: none;
  border-top: 1px solid #f0f2f4;
  background: transparent;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
  text-align: start;
}

.lang-link:first-child { border-top: none; }
.lang-link:hover { background: var(--accent-soft); color: var(--accent); }

.lang-link-count {
  font-size: 12px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.lang-link:hover .lang-link-count { color: var(--accent); }

.lang-badge {
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef0f3;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.home-link { border-color: var(--line); }

/* ---------- touch ---------- */

/* There is no hover on a phone, so the row buttons — delete, suggest — would sit at
   opacity 0 and pointer-events: none forever. On touch they are simply always there. */
@media (hover: none) {
  /* Only the group heading's buttons are always on — there is no gesture that would
     reveal them otherwise. A word chip's buttons appear when you tap the word, via the
     :focus-within rule above, which keeps the rows compact until you mean to edit. */
  .group-head .icon-btn { opacity: 1; pointer-events: auto; }

  .word .icon-btn { min-width: 34px; min-height: 34px; }
  .word:focus-within { background: #fff; border-color: var(--accent); }

  /* Thumb-sized targets. 24px of icon in a 40px box. */
  .group-head .icon-btn, .drag-handle {
    min-width: 40px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
  }

  .word { padding: 4px 4px 4px 8px; }
  .word-grip { display: none; }          /* dragging does not work on touch anyway */
  .select { width: 22px; height: 22px; }
  .difficulty { min-height: 36px; font-size: 13px; }
}

/* ---------- narrow screens ---------- */

@media (max-width: 700px) {
  main { padding: 12px 12px 48px; }

  /* Header: brand, account and pages each on their own line rather than one wide row. */
  .topbar {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 12px;
  }

  .brand h1 { font-size: 15px; }
  .brand-sub { display: none; }
  .authbar { margin-inline-start: auto; }
  .auth-who { max-width: 42vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .features {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  .features::-webkit-scrollbar { display: none; }
  .feature { flex: none; }

  /* Toolbar: a wrapping stack, and nothing pinned to an edge it can run off. */
  .toolbar { flex-direction: column; align-items: stretch; gap: 10px; }
  .toolbar-group { flex-wrap: wrap; gap: 8px; }
  .toolbar-right { margin-inline-start: 0; }
  #filter { width: 100%; }
  .field { flex: 1 1 auto; }
  .field select { flex: 1 1 auto; }

  .btn, .feature { min-height: 40px; }
  #confirmReview { flex: 1 1 100%; }

  .stats, .save-state { text-align: start; min-width: 0; }

  /* A group becomes a card: heading on top, words underneath. */
  .group { flex-direction: column; gap: 8px; padding: 10px; }
  .group-head { flex: 1 1 auto; width: 100%; flex-wrap: wrap; }
  .group-name { font-size: 15px; }
  .words { width: 100%; }

  .pager { flex-wrap: wrap; justify-content: center; }
  .pager-range { width: 100%; margin-inline-start: 0; text-align: center; }
  .pager-btn { min-width: 44px; min-height: 44px; }
  .pager-jump input { width: 72px; min-height: 44px; }

  .home { padding: 12px 0 48px; }
  .home-grid { grid-template-columns: 1fr; }
  .lang-link { padding: 16px 18px; }
}

/* On a phone the controls are taller than the first row of data, so everything except
   the filter and Confirm Review folds behind "Options". */
#toolbarToggle { display: none; }

@media (max-width: 700px) {
  #toolbarToggle { display: inline-flex; align-items: center; }
  #toolbarToggle[aria-expanded="true"] { background: var(--accent-soft); border-color: #cfe0fd; color: var(--accent); }

  .toolbar .field,
  .toolbar-right { display: none; }

  .toolbar.is-open .field { display: flex; }
  .toolbar.is-open .toolbar-right { display: flex; }

  #filter { flex: 1 1 auto; width: auto; min-width: 0; }
  .toolbar-group:first-child { flex-wrap: wrap; }
}

/* The one physical margin left over — it pinned the right-hand controls off-screen
   in RTL, where "left" is the wrong edge. */
.toolbar-right { margin-left: 0; margin-inline-start: auto; }