@font-face {
  font-family: "Andika";
  src: url("./assets/fonts/Andika-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Andika";
  src: url("./assets/fonts/Andika-Medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "Andika";
  src: url("./assets/fonts/Andika-SemiBold.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "Andika";
  src: url("./assets/fonts/Andika-Bold.woff2") format("woff2");
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
}

:root {
  color-scheme: light;
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #15171a;
  --muted: #626972;
  --border: #dfe3e8;
  --accent: #2457d6;
  --accent-strong: #1942aa;
  --accent-soft: #eef2ff;
  --danger: #a52323;
  --danger-soft: #fff1f1;
  --success: #176b3a;
  --shadow: 0 8px 30px rgba(0, 0, 0, .08);
  --radius: 18px;
  --mobile-nav-height: 66px;
  font-family: "Andika", sans-serif;
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}
body.modal-open {
  position: fixed;
  width: 100%;
  overflow: hidden;
  overscroll-behavior: none;
}
button, input, select, textarea {
  font: inherit;
  font-family: "Andika", sans-serif;
}
button, select { touch-action: manipulation; }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible {
  outline: 3px solid rgba(36, 87, 214, .25);
  outline-offset: 2px;
}
button { -webkit-tap-highlight-color: transparent; }

.shell {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 12px 12px calc(var(--mobile-nav-height) + 18px + env(safe-area-inset-bottom));
}

/* Header: mobile-first. On phones the title and utility icons share one compact row,
   while the word-list selector occupies its own 48px row. */
.app-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px 44px;
  grid-template-rows: 44px 48px;
  gap: 7px 8px;
  align-items: center;
  margin-bottom: 8px;
}
.brand {
  grid-column: 1;
  grid-row: 1;
  min-width: 0;
}
.brand h1 {
  margin: 0;
  font-size: clamp(1.65rem, 8vw, 2rem);
  line-height: 1;
  letter-spacing: -.035em;
}
.group-controls,
.group-row { display: contents; }
#groupSelect {
  grid-column: 1 / -1;
  grid-row: 2;
  width: 100%;
}
#manageGroupsBtn { grid-column: 2; grid-row: 1; }
#infoBtn { grid-column: 3; grid-row: 1; }

select, .filter-input, .new-group-row input, .group-edit-input, .word-edit-body input {
  min-width: 0;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  padding: 9px 11px;
}
.icon-btn, .close-btn {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}
.close-btn {
  flex: 0 0 auto;
  border: 0;
  border-radius: 50%;
  background: #f1f3f5;
}

/* Update information remains visible near the top, but is compact on phones. */
.update-banner {
  display: grid;
  gap: 8px;
  margin: 0 0 10px;
  padding: 10px 11px;
  border: 1px solid #b9c8f4;
  border-radius: 13px;
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.update-banner[hidden] { display: none; }
.update-banner > div { display: grid; gap: 1px; }
.update-banner span { font-size: .82rem; }

/* Mobile bottom navigation. It becomes a normal top tab bar from tablet size upward. */
.tabs {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  min-height: calc(var(--mobile-nav-height) + env(safe-area-inset-bottom));
  padding: 5px max(8px, env(safe-area-inset-left)) max(5px, env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-right));
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, .97);
  box-shadow: 0 -8px 28px rgba(0, 0, 0, .08);
  backdrop-filter: blur(12px);
}
.tab {
  position: relative;
  min-width: 0;
  min-height: 54px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: .75rem;
  font-weight: 800;
}
.tab.is-active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}
.tab-icon { width: 21px; height: 21px; }
.tab-label { line-height: 1.1; white-space: nowrap; }
.tab-label-desktop { display: none; }
.tab-label-mobile { display: inline; }
.badge {
  position: absolute;
  top: 4px;
  left: calc(50% + 8px);
  display: inline-grid;
  place-items: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 999px;
  background: #dce5ff;
  color: var(--accent-strong);
  font-size: .68rem;
  line-height: 1;
}

.view[hidden] { display: none !important; }

/* Search */
.search-wrap { padding: 2px 0 6px; }
.search-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
}
.search-input-wrap {
  position: relative;
  min-width: 0;
}
.search-form input {
  width: 100%;
  min-width: 0;
  min-height: 48px;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  padding: 10px 49px 10px 11px;
  font-size: 1.05rem;
}
/* We provide our own always-accessible clear action instead of relying on
   browser-specific hover/native search controls. */
.search-form input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}
.search-clear {
  position: absolute;
  top: 50%;
  right: 3px;
  transform: translateY(-50%);
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 11px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.search-clear[hidden] { display: none !important; }
.search-clear .icon { width: 21px; height: 21px; }
.search-clear:active { background: #eef0f3; }
@media (hover: hover) and (pointer: fine) {
  .search-clear:hover { background: #eef0f3; color: var(--text); }
}
.search-submit {
  width: 48px;
  min-width: 48px;
  min-height: 48px;
  padding: 0;
}
.search-submit .button-label { display: none; }

.primary-btn, .secondary-btn, .danger-btn, .small-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  border: 0;
  border-radius: 12px;
  padding: 0 14px;
  cursor: pointer;
  font-weight: 800;
}
.primary-btn { background: var(--accent); color: #fff; }
.secondary-btn { background: var(--accent-soft); color: var(--accent-strong); }
.danger-btn { background: var(--danger-soft); color: var(--danger); }
.primary-btn:disabled, .secondary-btn:disabled, .small-btn:disabled {
  opacity: .55;
  cursor: default;
}

.suggestions {
  margin: 8px 0 0;
  min-width: 0;
}
.suggestions-label {
  display: block;
  margin: 0 0 5px 2px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 750;
}
.chip-row {
  display: flex;
  gap: 6px;
  min-width: 0;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
  padding: 1px 2px 5px;
  scroll-snap-type: x proximity;
}
.chip-row::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text);
  padding: 6px 11px;
  cursor: pointer;
  scroll-snap-align: start;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 28px;
  margin: 2px 2px 6px;
}
.status {
  min-width: 0;
  color: var(--muted);
  font-size: .92rem;
  font-weight: 650;
  line-height: 1.3;
}
.network-status {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: .76rem;
}
.network-status.is-offline { color: var(--danger); font-weight: 750; }

/* Image/vocabulary cards */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  box-shadow: 0 1px 5px rgba(0, 0, 0, .025);
  container-type: inline-size;
}
.card-main {
  display: block;
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: inherit;
  padding: 0;
  text-align: inherit;
  cursor: pointer;
}
.card-main:focus-visible { outline: none; }
.imgbox {
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  padding: 7px;
  background: #fff;
}
.imgbox img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.card-label {
  min-width: 0;
  padding: 9px 10px 10px;
  border-top: 1px solid var(--border);
  font-size: .94rem;
  font-weight: 850;
  line-height: 1.18;
  overflow-wrap: anywhere;
}
.card-meta {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 600;
}
.saved-indicator {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  max-width: calc(100% - 12px);
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, .94);
  font-size: .68rem;
  font-weight: 850;
}
.saved-indicator .icon { width: 12px; height: 12px; }

#vocabularyList {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.card-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 5px;
  width: 100%;
  padding: 0 7px 7px;
}
.small-btn {
  width: 100%;
  min-width: 0;
  min-height: 40px;
  padding-inline: 6px;
  overflow: hidden;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 750;
}
.small-btn.is-danger { background: var(--danger-soft); color: var(--danger); }
.card-actions .button-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
@container (max-width: 250px) {
  .card-actions .button-label { display: none; }
  .card-actions .icon { width: 19px; height: 19px; }
}

.empty, .error {
  grid-column: 1 / -1;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  color: var(--muted);
  line-height: 1.4;
}
.error { color: var(--danger); }

/* Vocabulary */
.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin: 8px 0 8px;
}
.section-heading h2 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.15;
}
.section-heading p { margin: 3px 0 0; }
.vocabulary-heading h2 { display: none; }
.vocabulary-heading {
  margin-top: 2px;
  margin-bottom: 7px;
}
.vocabulary-heading p {
  font-size: .88rem;
  font-weight: 650;
}
.toolbar { display: flex; gap: 7px; flex-wrap: wrap; }
.vocab-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 104px;
  gap: 7px;
  margin-bottom: 9px;
}
.filter-input { width: 100%; }
#vocabSort { width: 100%; }
.muted { color: var(--muted); }

/* PDF builder */
#pdfView > .section-heading { display: none; }
.pdf-builder {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.pdf-options {
  display: grid;
  gap: 10px;
  padding: 0;
  background: transparent;
}
.field-group { display: grid; gap: 5px; }
.field-group label,
.field-group > span {
  color: var(--muted);
  font-size: .8rem;
  font-weight: 800;
}
.field-group select { width: 100%; }
.pdf-selection-summary,
.pdf-list-heading,
.pdf-preview-heading,
.pdf-preview-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}
.compact-btn { min-height: 38px; padding: 0 11px; }
.pdf-actions { display: grid; gap: 7px; }
.pdf-status {
  min-height: 18px;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 650;
}
.pdf-list-heading { margin: 1px 0 7px; }
.pdf-word-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.pdf-word-card {
  position: relative;
  display: grid;
  grid-template-rows: 1fr auto;
  min-width: 0;
  min-height: 150px;
  overflow: hidden;
  border: 2px solid var(--border);
  border-radius: 13px;
  background: var(--card);
  cursor: pointer;
}
.pdf-word-card.is-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(36, 87, 214, .1);
}
.pdf-word-card img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  padding: 7px;
  background: #fff;
}
.pdf-word-checkbox {
  position: absolute;
  top: 7px;
  right: 7px;
  z-index: 2;
  width: 22px;
  height: 22px;
  accent-color: var(--accent);
}
.pdf-word-label {
  display: block;
  padding: 8px 9px 9px;
  border-top: 1px solid var(--border);
  font-size: .9rem;
  font-weight: 850;
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.pdf-preview-panel { display: grid; gap: 7px; }
.pdf-preview-stage {
  display: grid;
  place-items: center;
  min-height: 165px;
  padding: 9px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #eceff3;
}
.pdf-preview-sheet {
  width: min(100%, 170px);
  aspect-ratio: 210 / 297;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 1.2%;
  padding: 4.8% 4.8% 2.7%;
  background: #fff;
  color: #111;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .16);
  font-family: "Andika", sans-serif;
}
.pdf-preview-page-body {
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(var(--pdf-preview-columns), minmax(0, 1fr));
  grid-template-rows: repeat(var(--pdf-preview-rows), minmax(0, 1fr));
  gap: var(--pdf-preview-gap);
}
.pdf-preview-empty {
  grid-column: 1 / -1;
  grid-row: 1 / -1;
  display: grid;
  place-items: center;
  border: 1px dashed #c7ccd3;
  color: #8a9098;
  font-size: .62rem;
  text-align: center;
}
.pdf-preview-card {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  align-items: center;
  overflow: hidden;
  border: 1px solid #c9cdd2;
  background: #fff;
  padding: 4%;
}
.pdf-preview-card.mode-image,
.pdf-preview-card.mode-word { grid-template-rows: minmax(0, 1fr); }
.pdf-preview-card.mode-word { place-items: center; }
.pdf-preview-image-wrap {
  min-height: 0;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  padding: 2%;
}
.pdf-preview-image-wrap img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.pdf-preview-word {
  width: 100%;
  padding: 2% 1% 5%;
  font-size: .62rem;
  line-height: 1.05;
  font-weight: 800;
  text-align: center;
  overflow-wrap: anywhere;
}
.pdf-preview-source {
  position: absolute;
  right: 3%;
  bottom: 1.5%;
  color: #555;
  font-size: .25rem;
  line-height: 1;
}
.pdf-preview-sheet.is-single .pdf-preview-word { font-size: 1.35rem; }
.pdf-preview-sheet.is-cards4 .pdf-preview-word { font-size: .78rem; }
.pdf-preview-sheet.is-compact9 .pdf-preview-word { font-size: .52rem; }
.pdf-preview-sheet.is-single .pdf-preview-source { font-size: .34rem; }
.pdf-preview-sheet.is-cards4 .pdf-preview-source { font-size: .27rem; }
.pdf-preview-card.mode-word .pdf-preview-word { padding: 4%; font-size: .8rem; }
.pdf-preview-sheet.is-single .pdf-preview-card.mode-word .pdf-preview-word { font-size: 1.9rem; }
.pdf-preview-sheet.is-cards4 .pdf-preview-card.mode-word .pdf-preview-word { font-size: 1.03rem; }
.pdf-preview-sheet.is-compact9 .pdf-preview-card.mode-word .pdf-preview-word { font-size: .68rem; }
.pdf-preview-footer {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  color: #333;
  font-size: .26rem;
  line-height: 1.1;
}
.pdf-preview-footer-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pdf-preview-page-number { flex: 0 0 auto; }
.pdf-preview-nav .secondary-btn { flex: 1; }

/* Dialogs */
.viewer-dialog, .manage-dialog {
  border: 0;
  padding: 0;
  background: #fff;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .32);
  overflow: hidden;
}
.viewer-dialog::backdrop, .manage-dialog::backdrop { background: rgba(0, 0, 0, .68); }
.viewer-dialog {
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  margin: 0;
  border-radius: 0;
}
.viewer {
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  background: #fff;
}
.viewer-top, .dialog-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}
.viewer-top > div:first-child,
.dialog-heading > div:first-child { min-width: 0; }
.viewer-title {
  font-size: 1.2rem;
  font-weight: 900;
  line-height: 1.2;
  overflow-wrap: anywhere;
}
.viewer-subtitle {
  margin-top: 1px;
  color: var(--muted);
  font-size: .8rem;
}
.viewer-img {
  min-width: 0;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 8px;
  background: #fff;
}
.viewer-img img {
  display: block;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  object-fit: contain;
  object-position: center;
}
.viewer-actions {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 5px;
  padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: #fafbfc;
}
.viewer-actions .primary-btn,
.viewer-actions .secondary-btn {
  min-width: 0;
  min-height: 48px;
  padding: 0 7px;
}
.viewer-actions .button-label { display: none; }

.manage-dialog {
  width: 100%;
  max-width: none;
  max-height: 92vh;
  max-height: 92dvh;
  margin: auto 0 0;
  border-radius: 22px 22px 0 0;
}
.manage-panel {
  min-height: 0;
  padding: 0;
  margin: 0;
}
.dialog-heading h2 { margin: 0; font-size: 1.2rem; }
.dialog-heading p { margin: 2px 0 0; font-size: .8rem; line-height: 1.3; }
.group-list {
  display: grid;
  gap: 7px;
  max-height: 42vh;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 10px 12px 0;
}
.group-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) repeat(3, 42px);
  gap: 5px;
  align-items: center;
  padding: 7px;
  border: 1px solid var(--border);
  border-radius: 13px;
}
.group-item .small-btn {
  width: 42px;
  min-height: 42px;
  padding: 0;
}
.group-item .button-label { display: none; }
.group-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 800;
}
.group-count { color: var(--muted); font-size: .76rem; font-weight: 650; }
.group-item.is-editing,
.group-item.is-confirming {
  grid-template-columns: minmax(0, 1fr) 42px 42px;
}
.group-edit-wrap { min-width: 0; }
.subtle-btn { background: #f1f3f5; color: var(--text); }
.group-delete-copy { min-width: 0; display: grid; gap: 2px; }
.group-delete-copy strong { color: var(--danger); }
.group-delete-copy span { color: var(--muted); font-size: .76rem; line-height: 1.3; }
.group-data-tools {
  display: grid;
  gap: 8px;
  margin: 10px 12px 0;
  padding: 11px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: #fafbfc;
}
.group-data-tools p { margin: 2px 0 0; font-size: .78rem; line-height: 1.3; }
.group-data-actions { display: grid; grid-template-columns: 1fr 1fr; }
.group-data-actions .secondary-btn { min-width: 0; }
.new-group-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
  margin-top: 10px;
  padding: 10px 12px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
}

.info-dialog, .word-edit-dialog, .quick-pdf-dialog { width: 100%; }
.info-body {
  display: grid;
  gap: 14px;
  max-height: 72vh;
  max-height: 72dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 13px 12px calc(14px + env(safe-area-inset-bottom));
}
.info-section { display: grid; gap: 8px; }
.info-section h3 { margin: 0; font-size: 1rem; }
.info-section p { margin: 0; line-height: 1.45; }
.contribution-card {
  display: grid;
  gap: 6px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: #fafbfc;
}
.contribution-card a {
  width: fit-content;
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
.contribution-note { color: var(--muted); font-size: .82rem; }
.word-edit-body {
  display: grid;
  gap: 12px;
  padding: 13px 12px calc(14px + env(safe-area-inset-bottom));
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 7px;
  flex-wrap: wrap;
}
.inline-error {
  padding: 8px 10px;
  border: 1px solid #efb7b7;
  border-radius: 11px;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: .86rem;
  font-weight: 700;
}
.quick-pdf-dialog .manage-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  max-height: 92vh;
  max-height: 92dvh;
}
.quick-pdf-body {
  min-height: 0;
  display: grid;
  gap: 11px;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 12px 12px calc(14px + env(safe-area-inset-bottom));
}
.quick-preview-panel .pdf-preview-stage { min-height: 205px; }
.quick-preview-panel .pdf-preview-sheet { width: min(100%, 210px); }
.quick-pdf-actions {
  position: sticky;
  bottom: 0;
  z-index: 2;
  padding-top: 7px;
  background: linear-gradient(to bottom, rgba(255,255,255,.82), #fff 28%);
}
.quick-pdf-actions .primary-btn { width: 100%; }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--mobile-nav-height) + 14px + env(safe-area-inset-bottom));
  z-index: 100;
  max-width: min(90vw, 520px);
  transform: translateX(-50%);
  padding: 10px 13px;
  border-radius: 12px;
  background: #16191d;
  color: #fff;
  box-shadow: var(--shadow);
  font-size: .88rem;
  font-weight: 700;
  text-align: center;
}

.icon {
  width: 1.15em;
  height: 1.15em;
  display: inline-block;
  flex: 0 0 auto;
  vertical-align: -.16em;
}
.inline-icon { width: 1em; height: 1em; }
.icon-btn .icon { width: 20px; height: 20px; }
a .inline-icon { margin-left: 3px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (hover: hover) and (pointer: fine) {
  .primary-btn:hover { background: var(--accent-strong); }
  .card:hover,
  .pdf-word-card:hover { box-shadow: var(--shadow); }
}

/* Larger phones / small tablets: allow a little more breathing room without changing workflow. */
@media (min-width: 480px) {
  .shell { padding-inline: 16px; }
  .pdf-preview-sheet { width: min(100%, 190px); }
}

/* Tablet and desktop switch back to a top navigation and horizontal header. */
@media (min-width: 640px) {
  .shell {
    padding: 20px;
  }
  .app-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 14px;
  }
  .brand { display: block; }
  .brand h1 { font-size: clamp(1.9rem, 4vw, 2.4rem); }
  .group-controls {
    display: block;
    width: min(100%, 390px);
    min-width: 310px;
  }
  .group-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 46px 46px;
    gap: 8px;
  }
  #groupSelect,
  #manageGroupsBtn,
  #infoBtn {
    grid-column: auto;
    grid-row: auto;
  }
  .icon-btn { width: 46px; height: 46px; }

  .update-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 14px;
    padding: 11px 13px;
  }

  .tabs {
    position: static;
    display: inline-flex;
    min-height: 0;
    padding: 5px;
    margin-bottom: 14px;
    border: 1px solid var(--border);
    border-radius: 15px;
    background: var(--card);
    box-shadow: none;
    backdrop-filter: none;
  }
  .tab {
    min-height: 44px;
    flex-direction: row;
    gap: 7px;
    padding: 8px 14px;
    font-size: .92rem;
  }
  .tab-icon { width: 18px; height: 18px; }
  .tab-label-desktop { display: inline; }
  .tab-label-mobile { display: none; }
  .badge {
    position: static;
    min-width: 21px;
    height: 21px;
    margin-left: 1px;
    font-size: .76rem;
  }

  .search-wrap {
    position: sticky;
    top: 0;
    z-index: 10;
    padding: 6px 0 12px;
    background: linear-gradient(var(--bg) 82%, rgba(246,247,249,0));
  }
  .search-form {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 7px;
    padding: 6px;
    border-radius: 18px;
    box-shadow: 0 5px 20px rgba(0,0,0,.055);
  }
  .search-submit {
    width: auto;
    min-width: 116px;
    padding: 0 18px;
  }
  .search-submit .button-label { display: inline; }
  .suggestions { margin-top: 9px; }
  .chip-row { flex-wrap: wrap; overflow: visible; padding-bottom: 0; }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 12px;
  }
  #vocabularyList {
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  }
  .imgbox { padding: 9px; }
  .card-label { padding: 10px 11px 12px; font-size: .98rem; }
  .card-actions { padding: 0 9px 9px; gap: 6px; }

  .section-heading { margin: 4px 0 12px; }
  .section-heading h2 { font-size: 1.55rem; }
  .vocabulary-heading h2 { display: block; }
  .vocabulary-heading p { font-size: .9rem; }
  .vocab-tools {
    grid-template-columns: minmax(0, 1fr) 150px;
    gap: 9px;
    margin-bottom: 14px;
  }

  #pdfView > .section-heading { display: flex; }
  .pdf-options {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    box-shadow: 0 2px 10px rgba(0,0,0,.03);
  }
  .pdf-word-grid {
    grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
    gap: 10px;
  }
  .pdf-preview-stage { min-height: 205px; padding: 11px; }
  .pdf-preview-sheet { width: min(100%, 220px); }

  .viewer-dialog {
    width: min(96vw, 1000px);
    height: min(94vh, 900px);
    height: min(94dvh, 900px);
    margin: auto;
    border-radius: 24px;
  }
  .viewer-top, .dialog-heading { padding: 12px 14px; }
  .viewer-title { font-size: clamp(1.2rem, 3vw, 1.5rem); }
  .viewer-img { padding: clamp(10px, 3vw, 28px); }
  .viewer-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 11px;
  }
  .viewer-actions .button-label { display: inline; }

  .manage-dialog {
    width: min(94vw, 680px);
    max-height: 90vh;
    max-height: 90dvh;
    margin: auto;
    border-radius: 22px;
  }
  .group-list { max-height: 50vh; padding: 12px 14px 0; }
  .group-item {
    grid-template-columns: minmax(0, 1fr) auto auto auto;
    gap: 7px;
    padding: 8px;
  }
  .group-item .small-btn {
    width: auto;
    min-height: 40px;
    padding: 0 10px;
  }
  .group-item .button-label { display: inline; }
  .group-item.is-editing,
  .group-item.is-confirming { grid-template-columns: minmax(0, 1fr) auto auto; }
  .group-data-tools { margin-inline: 14px; padding: 12px; }
  .group-data-actions { display: flex; }
  .new-group-row { padding: 14px; }
  .info-body { padding: 16px; }
  .word-edit-body { padding: 16px; }
  .quick-pdf-body { padding: 16px; }
  .quick-preview-panel .pdf-preview-stage { min-height: 245px; }
  .quick-preview-panel .pdf-preview-sheet { width: min(100%, 260px); }

  .toast { bottom: max(20px, env(safe-area-inset-bottom)); }
}

/* Wide tablet / desktop: two-column PDF workspace and larger card grid. */
@media (min-width: 800px) {
  .pdf-builder {
    grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }
  .pdf-options {
    position: sticky;
    top: 12px;
  }
}

@media (min-width: 900px) {
  .shell { padding: 28px 30px; }
  .app-header { margin-bottom: 16px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px; }
  #vocabularyList { grid-template-columns: repeat(auto-fill, minmax(235px, 1fr)); }
  .pdf-builder { grid-template-columns: minmax(270px, 340px) minmax(0, 1fr); gap: 22px; }
  .pdf-options { padding: 16px; gap: 13px; }
  .pdf-preview-sheet { width: min(100%, 230px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Presentation mode: app-level viewport presentation instead of the browser Fullscreen API.
   This works consistently on iPhone/Safari and fills the currently available browser viewport. */
.presentation-word,
.presentation-exit {
  display: none;
}
.presentation-exit[hidden] { display: none !important; }

.viewer-dialog.is-presenting {
  position: fixed;
  inset: 0;
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  margin: 0;
  border-radius: 0;
  background: #000;
  box-shadow: none;
  overflow: hidden;
}
.viewer-dialog.is-presenting::backdrop { background: #000; }
.viewer.is-presenting {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  background: #000;
  color: #fff;
  overflow: hidden;
}
.viewer.is-presenting .viewer-top,
.viewer.is-presenting .viewer-actions {
  display: none;
}
.viewer.is-presenting .viewer-img {
  grid-row: 1;
  min-height: 0;
  padding:
    max(18px, env(safe-area-inset-top))
    max(18px, env(safe-area-inset-right))
    10px
    max(18px, env(safe-area-inset-left));
  background: #000;
  overflow: hidden;
}
.viewer.is-presenting .viewer-img img {
  box-sizing: border-box;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  padding: clamp(8px, 1.6vw, 22px);
  border-radius: clamp(14px, 2vw, 26px);
  background: #fff;
  object-fit: contain;
  object-position: center;
}
.viewer.is-presenting .presentation-word {
  grid-row: 2;
  display: block;
  min-width: 0;
  padding: 8px 20px max(18px, env(safe-area-inset-bottom));
  background: #000;
  color: #fff;
  font-size: clamp(2rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.08;
  text-align: center;
  overflow-wrap: anywhere;
}
.viewer.is-presenting .presentation-exit {
  position: absolute;
  top: max(12px, env(safe-area-inset-top));
  right: max(12px, env(safe-area-inset-right));
  z-index: 4;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, .38);
  border-radius: 999px;
  background: rgba(0, 0, 0, .68);
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.viewer.is-presenting .presentation-exit .icon {
  width: 19px;
  height: 19px;
}


@media (min-width: 900px) {
  .viewer-actions {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* Narrow landscape phones / split views / small tablets: text buttons need two rows.
   Below 480px the six icon-only controls remain intentionally compact. */
@media (min-width: 480px) and (max-width: 639.98px) {
  .viewer-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .viewer-actions .button-label { display: inline; }
  .viewer-actions .primary-btn,
  .viewer-actions .secondary-btn {
    min-width: 0;
    padding-inline: 10px;
    white-space: nowrap;
  }
}