/* App shell stylesheet. Consumes Palette.css tokens only; see Doc/Styling.md. */

/* Terminal themes' pixel font (VT323, SIL OFL). */
@font-face {
  font-family: 'Terminal Pixel';
  src: url('/Static/Shared/Fonts/VT323-Regular.ttf') format('truetype');
  font-display: swap;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: var(--font-body, -apple-system, BlinkMacSystemFont,
                   "Segoe UI", Roboto, Inter, sans-serif);
  font-size: 15px;
  line-height: 1.55;
}
.mono, code, pre, .qid, .sub-id { font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.muted { color: var(--muted); }
.hint { font-size: 12px; }

/* ------- layout ------- */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 10px 20px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand a {
  color: var(--fg); font-weight: 600;
  font-size: 16px; letter-spacing: 0.02em;
}
.topbar nav {
  margin-left: auto;
  display: flex; gap: 14px; align-items: center;
}
.topbar nav a { color: var(--muted); }
.topbar nav a:hover { color: var(--fg); text-decoration: none; }
.topbar .who {
  padding: 2px 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  color: var(--fg);
}
.topbar form.inline { display: inline; margin: 0; }

/* Topbar theme picker (a <details>; Base.html's JS sets the choice). */
.theme-picker {
  position: relative;
  display: inline-block;
  margin-left: 6px;
}
.theme-picker > summary {
  list-style: none;
  cursor: pointer;
  user-select: none;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 6px;
  opacity: 0.7;
}
.theme-picker > summary::-webkit-details-marker { display: none; }
.theme-picker > summary:hover { opacity: 1; background: var(--bg-2); }
.theme-picker[open] > summary { opacity: 1; background: var(--bg-2); }
.theme-picker-menu {
  position: absolute; top: calc(100% + 4px); right: 0;
  list-style: none;
  margin: 0; padding: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-width: 170px;
  z-index: 20;
}
.theme-picker-menu li { margin: 0; }
.theme-picker-divider {
  height: 1px;
  margin: 4px 6px;
  background: var(--border);
  pointer-events: none;
}
.theme-picker-menu button {
  display: block; width: 100%;
  text-align: left;
  padding: 6px 10px;
  background: none; border: none;
  color: var(--fg);
  font-size: 13px;
  cursor: pointer;
  border-radius: 4px;
  white-space: nowrap;
}
.theme-picker-menu button:hover {
  background: var(--bg-2);
  border-color: transparent;
}
.theme-picker-menu button.is-active {
  background: var(--bg-2);
  color: var(--accent);
  font-weight: 600;
}
.theme-picker-menu button.is-active::after {
  content: " ✓";
  color: var(--accent);
}
button.link {
  background: none; border: none; padding: 0;
  color: var(--muted); cursor: pointer; font: inherit;
}
button.link:hover { color: var(--fg); text-decoration: underline; }

/* ------- Prism-highlighted code blocks (<pre class="code">) ------- */
pre.code {
  background: var(--code-bg); color: var(--code-fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
  margin: 8px 0;
}
pre.code code { background: none; padding: 0; }

pre.code .token.comment,
pre.code .token.prolog,
pre.code .token.doctype,
pre.code .token.cdata        { color: var(--code-token-comment); font-style: italic; }
pre.code .token.punctuation  { color: var(--code-token-comment); }
pre.code .token.namespace    { opacity: 0.7; }
pre.code .token.keyword,
pre.code .token.builtin,
pre.code .token.important,
pre.code .token.selector,
pre.code .token.atrule,
pre.code .token.tag,
pre.code .token.attr-name    { color: var(--code-token-keyword); }
pre.code .token.boolean,
pre.code .token.number,
pre.code .token.constant,
pre.code .token.symbol,
pre.code .token.deleted      { color: var(--code-token-number); }
pre.code .token.string,
pre.code .token.char,
pre.code .token.attr-value,
pre.code .token.regex,
pre.code .token.inserted,
pre.code .token.url          { color: var(--code-token-string); }
pre.code .token.function,
pre.code .token.class-name,
pre.code .token.variable,
pre.code .token.property     { color: var(--code-token-function); }
pre.code .token.operator,
pre.code .token.entity       { color: var(--code-token-function); }
pre.code .token.bold         { font-weight: 600; }
pre.code .token.italic       { font-style: italic; }

/* Prism copy-to-clipboard toolbar; Prism's own plugin CSS is not shipped. */
div.code-toolbar {
  position: relative;
  margin: 8px 0;
}
div.code-toolbar > pre.code {
  margin: 0;
}
div.code-toolbar > .toolbar {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 2;
  display: flex;
  gap: 4px;
  opacity: 0.55;
  transition: opacity 0.15s ease-in-out;
}
div.code-toolbar:hover > .toolbar,
div.code-toolbar:focus-within > .toolbar {
  opacity: 1;
}
div.code-toolbar > .toolbar > .toolbar-item {
  display: inline-flex;
}
div.code-toolbar > .toolbar > .toolbar-item > button,
div.code-toolbar > .toolbar > .toolbar-item > a,
div.code-toolbar > .toolbar > .toolbar-item > span {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-size: 11px;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--muted);
  cursor: pointer;
  text-decoration: none;
  box-shadow: none;
}
div.code-toolbar > .toolbar > .toolbar-item > button:hover,
div.code-toolbar > .toolbar > .toolbar-item > button:focus,
div.code-toolbar > .toolbar > .toolbar-item > a:hover,
div.code-toolbar > .toolbar > .toolbar-item > a:focus {
  color: var(--fg);
  border-color: var(--accent, var(--border));
  outline: none;
}

/* Bank card grid (/browse, /admin/banks). */
.bank-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.bank-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 16px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.1s;
}
.bank-card:hover { border-color: var(--border-strong); }
.bank-card-head {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.bank-card-name {
  font-size: 16px; font-weight: 600;
  color: var(--accent);
}
.bank-card-stats {
  display: flex; gap: 18px;
  font-size: 13px;
}
.bank-card-stats .browse-stat strong {
  font-size: 18px; font-weight: 600;
  margin-right: 4px;
}

/* ------- cross-area utilities ------- */

/* --- Empty state --- */
.empty { text-align: center; padding: 40px 16px; }
.card.empty {
  padding: 14px 18px;
  text-align: center;
  color: var(--muted);
  border-style: dashed;
  font-size: 13px;
  box-shadow: none;
}
.card.empty p { margin: 0; }

/* --- Generic form layout --- */
.study-edit-form {
  display: flex; flex-direction: column; gap: 16px;
  max-width: 720px;
}
.study-field {
  display: flex; flex-direction: column; gap: 6px;
}
.study-field .field-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
}
.study-field .field-readonly {
  display: flex; align-items: center; gap: 10px;
}
.study-field input[type="text"],
.study-field select {
  background: var(--bg-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font: inherit;
}
.study-field textarea {
  font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  font-size: 13px;
}
.study-field .hint { font-size: 11px; }
.form-actions { display: flex; gap: 12px; }

/* --- Compact action button --- */
.action-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 4px;
  height: 26px;
  padding: 0 10px;
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.08s, border-color 0.08s, background 0.08s;
}
.action-btn:hover {
  color: var(--fg);
  border-color: var(--border-strong);
  background: var(--bg-2);
}
.action-btn .action-icon {
  font-size: 13px;
  line-height: 1;
  display: inline-block;
  width: 12px;
  text-align: center;
}

/* --- Section heading + "N items" count pill --- */
.section-head {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 22px 0 8px;
}
.section-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  text-transform: none;
}

/* --- Cross-area form / list utilities --- */
.subtopic-form { padding: 10px 0 0; }

.hub-empty {
  font-size: 12px;
  margin: 0 0 14px;
  padding: 6px 10px;
  border: 1px dashed var(--border);
  border-radius: 6px;
}
.hub-empty kbd {
  font-size: 10px;
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg);
  color: var(--muted);
}

/* --- Notes filter bar --- */
.notes-filter-bar .filter-group {
  display: flex; flex-direction: column; gap: 4px;
  margin: 0;
}
.notes-filter-bar .filter-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.notes-filter-bar select,
.notes-filter-bar input[type="search"] {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font: inherit;
  font-size: 13px;
}
.notes-filter-bar .filter-search { flex: 1 1 240px; min-width: 200px; }
.notes-filter-bar .filter-search input { width: 100%; }

/* --- Note-kind chip + dot --- */
.kind-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  font-size: 12px;
  color: var(--muted);
  text-transform: capitalize;
}
.kind-chip strong { color: var(--fg); font-weight: 600; }
.kind-chip .kind-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--muted);
}
.kind-chip.kind-mnemonic  { border-color: var(--accent); }
.kind-chip.kind-mnemonic .kind-dot { background: var(--accent); }
.kind-chip.kind-warning   { border-color: var(--warn); }
.kind-chip.kind-warning .kind-dot { background: var(--warn); }
.kind-chip.kind-reference { border-color: var(--ok); }
.kind-chip.kind-reference .kind-dot { background: var(--ok); }

/* --- Bank chip + breadcrumb --- */
.bank-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-2);
  font-size: 12px;
  color: var(--fg);
  text-transform: capitalize;
}
.bank-chip strong { font-weight: 600; color: var(--fg); }
/* Navigating chips: accent on hover only. */
a.bank-chip-link { color: inherit; text-decoration: none; cursor: pointer; }
a.bank-chip-link:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
a.bank-chip-link:hover strong { color: var(--accent); }
.bank-chip .bank-chip-flag {
  font-size: 11px;
  color: var(--warn);
}

.browse-crumb-link { color: var(--muted); text-decoration: none; }
.browse-crumb-link:hover { color: var(--accent); }
.browse-crumb-sep { margin: 0 6px; }
.wiki-breadcrumb-sep { color: var(--muted); }

/* --- Bank divider --- */
.bank-divider {
  border: 0;
  border-top: 1px dashed var(--border-strong);
  margin: 28px 0 8px;
}

/* --- History section header; matches the notes-panel header --- */
.history-list-head {
  display: flex; align-items: baseline; gap: 10px;
  margin: 18px 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.history-list-head h3 {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
}

/* --- Share panel --- */
.share-panel {
  margin: 18px 0 14px;
  padding: 12px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.share-panel h3 {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
pre.share-text {
  margin: 0 0 10px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  font-size: 14px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  max-width: 520px;
}
.share-toast {
  font-size: 13px;
  color: var(--ok);
  transition: opacity 0.2s;
}

/* --- Big-number summary stack --- */
.big-stats { display: flex; gap: 28px; flex-wrap: wrap; }
.big { text-align: left; }
.big-num { font-size: 28px; font-weight: 700; color: var(--fg); }
.big-lbl {
  font-size: 12px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* --- Data table --- */
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th, table.data td {
  padding: 8px 10px; text-align: left;
  border-bottom: 1px solid var(--border);
}
table.data th {
  color: var(--muted); font-weight: 500; font-size: 12px;
  text-transform: uppercase; letter-spacing: 0.05em;
}
table.data.compact th, table.data.compact td {
  padding: 4px 8px; font-size: 12px;
}
table.data td.num, table.data th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.flashes {
  max-width: 920px; margin: 12px auto 0; padding: 0 20px;
}
.flash {
  background: var(--no-bg); color: var(--no);
  border: 1px solid var(--no);
  padding: 8px 12px; border-radius: 6px; margin-bottom: 8px;
}

/* ------- cards ------- */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 12px; font-size: 15px; font-weight: 600; }
.card h3 { margin: 16px 0 6px; font-size: 13px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }

/* ------- forms -------
   `input:not([type])`: untyped inputs are text but don't match [type=text]. */
input:not([type]),
input[type=text], input[type=password], input[type=search],
input[type=number], input[type=email], input[type=url],
input[type=tel], input[type=date], input[type=time],
select, textarea {
  background: var(--bg-2); color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px; font: inherit;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent); outline-offset: -1px;
}
input[type=number] { width: 5rem; }
/* Hide the spinner buttons. */
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}
input[type=number] { -moz-appearance: textfield; }
label { display: block; margin: 8px 0; font-size: 13px; color: var(--muted); }
label > input, label > select, label > textarea { margin-top: 4px; }

button {
  background: var(--panel); color: var(--fg);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 8px 14px;
  font: inherit;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary {
  background: var(--accent); color: var(--on-accent);
  border-color: var(--accent);
  font-weight: 600;
}
button.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }

/* ------- chips (custom checkbox/radio look) ------- */
.chip-row {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 0; padding: 0; list-style: none;
}
/* Captioned chip group. */
.chip-group + .chip-group { margin-top: 12px; }
.chip-group-label {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-2);
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  transition: background 0.08s, border-color 0.08s, color 0.08s;
}
.chip:hover { color: var(--fg); border-color: var(--border-strong); }
.chip > input[type=checkbox],
.chip > input[type=radio] {
  /* hide the native control; the chip itself is the visual */
  position: absolute;
  width: 1px; height: 1px; opacity: 0; pointer-events: none;
}
.chip:has(input:checked) {
  background: var(--panel);
  border-color: var(--accent);
  color: var(--fg);
}
.chip:has(input:checked) .chip-label { font-weight: 600; }
.chip-meta {
  font-size: 11px; color: var(--muted);
  background: var(--bg);
  padding: 1px 7px; border-radius: 999px;
  border: 1px solid var(--border);
}
.chip:has(input:checked) .chip-meta { color: var(--accent); border-color: var(--accent); }

/* difficulty chip colour-overrides */
.diff-chip.diff-beginner:has(input:checked)    { color: var(--diff-beginner); border-color: var(--diff-beginner); }
.diff-chip.diff-intermediate:has(input:checked){ color: var(--diff-intermediate); border-color: var(--diff-intermediate); }
.diff-chip.diff-advanced:has(input:checked)    { color: var(--diff-advanced); border-color: var(--diff-advanced); }
.diff-chip.diff-expert:has(input:checked)      { color: var(--diff-expert); border-color: var(--diff-expert); }

.size-chip { min-width: 56px; justify-content: center; }
.size-chip:has(input:checked) {
  background: var(--accent); color: var(--on-accent); border-color: var(--accent);
}
.size-chip:has(input:checked) .chip-label { color: var(--on-accent); font-weight: 700; }

/* ------- native checkbox in any plain label ------- */
input[type=checkbox], input[type=radio] {
  accent-color: var(--accent);
}

/* ------- selects ------- */
select {
  background: var(--bg-2); color: var(--fg);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 28px 8px 10px; font: inherit;
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  /* Chevron from gradients: an SVG data-URI can't use var(). */
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: right 15px center, right 10px center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  cursor: pointer;
}
select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

/* ------- editor / page heads ------- */
/* Title left, actions right; when they don't fit, wrap-reverse puts the
   actions on their own right-aligned row ABOVE the title. */
.page-head {
  display: flex;
  flex-wrap: wrap-reverse;
  align-items: center;
  gap: 12px; margin-bottom: 12px;
}
.page-head h1 { margin: 0; font-size: 22px; }
.page-head-actions {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  margin-left: auto;
}
.page-head-actions > a,
.page-head-actions > button { white-space: nowrap; }

/* Inline "Bank: <select>" label on /stats. */
.bank-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}
.bank-switch > select { margin-top: 0; }

/* Back link above the page-head h1. */
.page-back {
  display: inline-block;
  margin: 0 0 6px;
  font-size: 12px;
  color: var(--muted);
}
.page-back:hover { color: var(--accent); text-decoration: none; }

textarea {
  background: var(--bg-2); color: var(--fg);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 10px; font: inherit;
  width: 100%;
  resize: vertical;
}
textarea.mono, textarea[name=code_source], textarea[name=references] {
  font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  font-size: 13px;
}
.grid-two { display: grid; grid-template-columns: 1fr 2fr; gap: 14px; }
.grid-three { display: grid; grid-template-columns: 1fr 2fr 2fr; gap: 14px; }
@media (max-width: 700px) {
  .grid-two, .grid-three { grid-template-columns: 1fr; }

  /* Smaller type; px-sized headings and numbers need explicit overrides. */
  html, body { font-size: 14px; }
  .page-head h1 { font-size: 18px; }
  .auth-card h1 { font-size: 18px; }
  .big-num,
  .kpi-num { font-size: 22px; }
  .today-stat .today-num,
  .daily-lifetime .big-num,
  .new-banner-id,
  .hub-card-count,
  .deck-reveal-keyword { font-size: 19px; }
  .deck-keyword { font-size: 22px; }
  .deck-glyph { font-size: 36px; }
  .briefing-subtopic-label { font-size: 24px; }

  /* Stack the deck reveal glyph above its meta. */
  .deck-reveal-grid { grid-template-columns: 1fr; gap: 12px; justify-items: center; }
  .deck-reveal-glyph { font-size: 80px; }
  .deck-reveal-meta { text-align: center; }

  /* Nav wraps under the brand; links never break mid-label. */
  .topbar { flex-wrap: wrap; padding: 8px 14px; gap: 8px 12px; }
  .topbar nav { margin-left: 0; flex-wrap: wrap; gap: 6px 12px; }
  .topbar nav a,
  .topbar nav button.link { white-space: nowrap; }

  /* Tables whose cells carry data-label become stacked cards; the first
     cell is the card header. */
  table.data:has(td[data-label]),
  table.data:has(td[data-label]) thead,
  table.data:has(td[data-label]) tbody,
  table.data:has(td[data-label]) tr,
  table.data:has(td[data-label]) td { display: block; }
  table.data:has(td[data-label]) thead { display: none; }
  table.data:has(td[data-label]) tr {
    border: 1px solid var(--border); border-radius: 4px;
    padding: 8px 10px; margin: 0 0 8px;
  }
  table.data:has(td[data-label]) td {
    padding: 2px 0; border: 0;
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
  }
  table.data:has(td[data-label]) td::before {
    content: attr(data-label);
    color: var(--muted); font-size: 12px;
    text-transform: uppercase; letter-spacing: 0.05em;
  }
  table.data:has(td[data-label]) td:first-child {
    border-bottom: 1px solid var(--border);
    padding-bottom: 6px; margin-bottom: 4px;
    font-weight: 600;
  }
  table.data:has(td[data-label]) td:first-child::before { display: none; }
  /* Unlabelled cells (action buttons) align right. */
  table.data:has(td[data-label]) td:not([data-label])::before { display: none; }
  table.data:has(td[data-label]) td:not([data-label]) { justify-content: flex-end; flex-wrap: wrap; }
}

label.choice-edit {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: center;
  margin: 6px 0;
}

button.danger {
  background: var(--no-bg); color: var(--no);
  border: 1px solid var(--no);
  font-weight: 600;
}
button.danger:hover { background: var(--no); color: var(--on-no); }

.delete-form {
  margin-top: 28px;
  padding: 16px; border: 1px dashed var(--no); border-radius: var(--radius);
}
.delete-form h3 { color: var(--no); margin: 0 0 8px; font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; }

.error-card {
  border-color: var(--no); background: var(--no-bg);
}
.error-card h3 { color: var(--no); margin-top: 0; }
.error-card ul { margin: 6px 0 0 18px; }
.error-card .mono { color: var(--no); }

.warn-card {
  border-color: var(--warn);
  background: color-mix(in srgb, var(--warn) 8%, transparent);
}

.link-btn {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  color: var(--fg);
  font-size: 13px;
  font-family: inherit;
  background: var(--panel);
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
}
.link-btn:hover {
  border-color: var(--accent);
  text-decoration: none;
}
/* Destructive small inline action ("Revoke"). */
.link-btn.danger {
  color: var(--no);
  border-color: var(--no);
  background: transparent;
}
.link-btn.danger:hover {
  background: var(--no);
  color: var(--on-no);
}

/* Action rows: buttons + link-btns side by side. */
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 8px; }

/* Session-complete card (quiz and deck rounds). */
.session-complete h2 { margin-top: 0; }
.session-complete .big-stats { margin: 12px 0 16px; }

/* ------- HTMX UI bits ------- */
.htmx-indicator {
  opacity: 0;
  transition: opacity 200ms;
  font-size: 12px;
}
.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator { opacity: 1; }

.match-count-wrap { margin-left: 6px; }
.match-count {
  font-size: 13px; color: var(--muted);
  padding: 4px 10px;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 999px;
}
.match-count strong { color: var(--accent); }
.match-count.empty { color: var(--no); border-color: var(--no); background: var(--no-bg); }

.inline-error {
  font-size: 12px; color: var(--no);
  padding: 2px 8px;
  background: var(--no-bg); border: 1px solid var(--no);
  border-radius: 4px;
  margin-left: 4px;
}
.inline-error:empty { display: none; }

.saved-card {
  border-color: var(--ok); background: var(--ok-bg);
}
.saved-card h3 { color: var(--ok); margin-top: 0; }

/* ------- difficulty ------- */
.diff {
  padding: 1px 8px; border-radius: 999px;
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em;
  border: 1px solid currentColor;
  display: inline-block;
}
.diff-beginner { color: var(--diff-beginner); }
.diff-intermediate { color: var(--diff-intermediate); }
.diff-advanced { color: var(--diff-advanced); }
.diff-expert { color: var(--diff-expert); }
.chip-label.diff-beginner:has(input:checked) { color: var(--diff-beginner); border-color: var(--diff-beginner); }
.chip-label.diff-intermediate:has(input:checked) { color: var(--diff-intermediate); border-color: var(--diff-intermediate); }
.chip-label.diff-advanced:has(input:checked) { color: var(--diff-advanced); border-color: var(--diff-advanced); }
.chip-label.diff-expert:has(input:checked) { color: var(--diff-expert); border-color: var(--diff-expert); }

.daily-complete { border-color: var(--ok); }
.daily-complete .big-stats { margin: 12px 0 16px; }

/* Generic status pill. */
.tag {
  font-size: 11px; text-transform: uppercase;
  padding: 1px 8px; border-radius: 999px;
  background: var(--bg-2); color: var(--muted);
  border: 1px solid var(--border);
  letter-spacing: 0.05em;
  display: inline-block;
}

.browse-stat strong {
  font-size: 18px; font-weight: 600;
  margin-right: 4px;
}
.browse-subtopic-label-line { margin: 0 0 4px; font-size: 16px; }

/* /browse/<topic> filter empty state. */
.browse-empty {
  margin: 24px 0;
  font-size: 14px;
}

/* Rendered-markdown body (notes, intros, briefings, study pages, wiki pages). */
.note-body {
  line-height: 1.55;
}
.note-body > *:first-child { margin-top: 0; }
.note-body > *:last-child  { margin-bottom: 0; }
.note-body p { margin: 6px 0; }
.note-body code,
.stem code,
.ctext code,
.explanation code,
.refs code,
.walk-link-note-text code,
.study-link-note code {
  background: var(--inline-code-bg);
  color: var(--inline-code-fg);
  padding: 1px 6px;
  border: 1px solid var(--inline-code-border);
  border-radius: 4px;
  font-size: 0.92em;
  font-family: "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
}
.note-body blockquote {
  margin: 10px 0;
  padding: 8px 14px;
  background: var(--bg-2);
  border-left: 3px solid var(--border-strong);
  border-radius: 0 4px 4px 0;
  color: var(--muted);
}
.note-body blockquote > *:first-child { margin-top: 0; }
.note-body blockquote > *:last-child  { margin-bottom: 0; }
.note-body ul, .note-body ol { margin: 6px 0; padding-left: 22px; }
.note-body a { color: var(--accent); }
.note-body table {
  border-collapse: collapse;
  margin: 10px 0;
  font-size: 0.95em;
}
.note-body th, .note-body td {
  border: 1px solid var(--border-strong);
  padding: 7px 12px;
  text-align: left;
  vertical-align: top;
}
.note-body th {
  background: var(--bg-2);
  font-weight: 600;
}
.note-body tr:nth-child(even) td { background: color-mix(in srgb, var(--fg) 3%, transparent); }
/* Task lists */
.note-body ul li input[type="checkbox"] {
  margin: 0 6px 0 -2px;
  vertical-align: middle;
}
.note-body ul li input[type="checkbox"]:only-child + * { margin-left: 0; }
/* Definition lists */
.note-body dl { margin: 8px 0; }
.note-body dt { font-weight: 600; margin-top: 6px; }
.note-body dd { margin: 2px 0 6px 18px; color: var(--fg); }
/* Footnotes */
.note-body section.footnotes {
  margin-top: 14px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  font-size: 0.9em;
  color: var(--muted);
}
.note-body section.footnotes ol { padding-left: 22px; }
.note-body sup a { text-decoration: none; }