/* ── Custom brand colours ─────────────────────────────────────────────── */
:root {
  --md-primary-fg-color:        #1e3a5f;   /* тёмно-синий, как обложка книги */
  --md-primary-fg-color--light: #2d5a8e;
  --md-primary-fg-color--dark:  #122540;
  --md-accent-fg-color:         #2563eb;
  --md-accent-fg-color--transparent: #2563eb1a;
}

[data-md-color-scheme="slate"] {
  --md-primary-fg-color:        #3b82f6;
  --md-primary-fg-color--light: #60a5fa;
  --md-primary-fg-color--dark:  #1d4ed8;
  --md-accent-fg-color:         #60a5fa;
}

/* ── Sidebar scrolling fix ───────────────────────────────────────────── */
.md-sidebar__scrollwrap {
  max-height: calc(100vh - 2.4rem);
  overflow-y: auto;
  scrollbar-width: thin;
}

/* ── Hide copyright footer, keep prev/next arrows ───────────────────── */
.md-footer-meta { display: none; }

/* ── Compact prev/next arrows ───────────────────────────────────────── */
.md-footer           { padding: 0; }
.md-footer__inner    { padding: .2rem .8rem; min-height: 0; }
.md-footer__link     { padding: .2rem .4rem; min-height: 0; }
.md-footer__button.md-icon { margin: 0; }
.md-footer__button.md-icon svg { width: .8rem; height: .8rem; }
.md-footer__title    { font-size: .68rem; padding: 0; }
.md-footer__direction { font-size: .6rem; opacity: .7; margin: 0; }
.md-ellipsis         { max-width: 200px; }

/* ── Typography ─────────────────────────────────────────────────────── */
.md-typeset {
  font-size: .75rem;
  line-height: 1.8;
}

/* ── Content width — комфортная ширина для чтения ───────────────────── */
.md-content__inner {
  max-width: 820px;
}

/* ── H1 — название раздела ──────────────────────────────────────────── */
.md-typeset h1 {
  font-weight: 700;
  font-size: 1.8em;
  letter-spacing: -.01em;
  border-bottom: 3px solid var(--md-primary-fg-color);
  padding-bottom: .35em;
  margin-bottom: 1em;
  color: var(--md-primary-fg-color);
}

/* ── H2 — подраздел ─────────────────────────────────────────────────── */
.md-typeset h2 {
  font-weight: 600;
  font-size: 1.35em;
  border-left: 4px solid var(--md-accent-fg-color);
  padding-left: .75em;
  margin-top: 2em;
}

/* ── H3 ─────────────────────────────────────────────────────────────── */
.md-typeset h3 {
  font-weight: 600;
  font-size: 1.1em;
  color: var(--md-primary-fg-color--light);
}

/* ── Inline code ────────────────────────────────────────────────────── */
.md-typeset code {
  font-size: .85em;
  padding: .1em .35em;
  border-radius: 4px;
  background: var(--md-code-bg-color);
}

/* ── Code blocks ─────────────────────────────────────────────────────── */
.md-typeset pre {
  border-radius: 6px;
  border: 1px solid #e2e8f0;
}

[data-md-color-scheme="slate"] .md-typeset pre {
  border-color: #334155;
}

/* ── Admonitions — callout-боксы как в учебнике ─────────────────────── */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 6px;
  border-left-width: 4px;
  font-size: .8rem;
}

/* Example (упражнение) — отдельный акцент */
.md-typeset .admonition.example,
.md-typeset details.example {
  border-left-color: #0891b2;
  background: #ecfeff;
}

[data-md-color-scheme="slate"] .md-typeset .admonition.example,
[data-md-color-scheme="slate"] .md-typeset details.example {
  background: #0c1f24;
}

/* ── Definition lists — глоссарий ──────────────────────────────────── */
.md-typeset dt {
  font-weight: 600;
  color: var(--md-primary-fg-color);
}

/* ── Tables ─────────────────────────────────────────────────────────── */
.md-typeset table:not([class]) th {
  background-color: var(--md-primary-fg-color);
  color: #fff;
}

.md-typeset table:not([class]) tr:hover {
  background-color: var(--md-accent-fg-color--transparent);
}

/* ── Навигационная полоска (breadcrumbs) ────────────────────────────── */
.md-nav__title {
  font-weight: 600;
}

/* ── Скрыть статусы перевода (done/review/draft) — служебные метаданные ── */
.md-status { display: none !important; }

/* ── Header ─────────────────────────────────────────────────────────── */
.md-header {
  box-shadow: 0 1px 4px rgba(0,0,0,.15);
}

/* ── Progress widget ────────────────────────────────────────────────── */
.progress-widget {
  background: var(--md-code-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  margin-bottom: 2rem;
}
.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .6rem;
  font-size: .85rem;
}
.progress-title { font-weight: 600; }
.progress-count { color: var(--md-default-fg-color--light); }
.progress-bar-wrap {
  height: 8px;
  background: var(--md-default-fg-color--lightest);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: .8rem;
}
.progress-bar-fill {
  height: 100%;
  background: var(--md-accent-fg-color);
  border-radius: 4px;
  transition: width .4s ease;
}
.progress-actions {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
}
.progress-actions .md-button {
  font-size: .75rem;
  padding: .3rem .8rem;
  cursor: pointer;
}

/* ── Exam objectives two-column grid ────────────────────────────────── */
.exam-grid {
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.exam-grid .md-typeset table:not([class]) {
  font-size: .78rem;
}
.exam-grid .md-typeset table:not([class]) td:first-child {
  white-space: nowrap;
  width: 55%;
}
@media (max-width: 960px) {
  .exam-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════════════════════════════════════
   QUIZ WIDGET
   ══════════════════════════════════════════════════════════════════════ */

.qz { max-width: 680px; margin: 2rem auto; }
.qz-card {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  background: var(--md-default-bg-color);
  overflow: hidden;
}

/* progress */
.qz-bar      { height: 3px; background: var(--md-default-fg-color--lightest); }
.qz-bar-fill { height: 3px; background: var(--md-primary-fg-color); transition: width .3s; }

/* top strip */
.qz-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 1.1rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
  font-size: .8rem;
  gap: .8rem;
}
.qz-nav-pos   { color: var(--md-default-fg-color--light); }
.qz-nav-score { font-weight: 700; color: var(--md-primary-fg-color); }
.qz-timer     { font-variant-numeric: tabular-nums; font-weight: 600; }
.qz-timer.warn { color: #d97706; }
.qz-timer.hot  { color: #dc2626; animation: qz-blink .9s infinite; }
@keyframes qz-blink { 0%,100%{opacity:1} 50%{opacity:.4} }

/* question text */
.qz-q { padding: 1.2rem 1.1rem .4rem; }
.qz-q p {
  margin: 0 !important;
  font-size: .93rem !important;
  font-weight: 600 !important;
  line-height: 1.65 !important;
}
.qz-hint {
  margin: .4rem 0 0 !important;
  font-size: .77rem !important;
  font-style: italic;
  color: var(--md-default-fg-color--light);
}

/* choices list */
.qz-choices {
  padding: .5rem 1.1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

/* each option — a <label> wrapping an <input> */
.qz-c {
  display: flex !important;
  align-items: center !important;
  gap: .65rem !important;
  padding: .6rem .85rem !important;
  border: 1px solid var(--md-default-fg-color--lightest) !important;
  border-radius: 6px !important;
  background: transparent !important;
  color: var(--md-default-fg-color) !important;
  font-size: .875rem !important;
  line-height: 1.5 !important;
  cursor: pointer !important;
  transition: border-color .1s, background .1s !important;
  margin: 0 !important;
  user-select: none;
}
.qz-c:hover { border-color: var(--md-primary-fg-color) !important; }

/* ── native radio / checkbox — override Material's tasklist styles ── */
.qz-c input[type="radio"],
.qz-c input[type="checkbox"] {
  -webkit-appearance: auto !important;
  appearance: auto !important;
  display: inline-block !important;
  width: 1em !important;
  height: 1em !important;
  min-width: 1em !important;
  margin: 0 !important;
  padding: 0 !important;
  border: initial !important;
  border-radius: initial !important;
  background: initial !important;
  box-shadow: none !important;
  opacity: 1 !important;
  flex-shrink: 0 !important;
  cursor: pointer !important;
  vertical-align: middle !important;
  accent-color: var(--md-accent-fg-color) !important;
  filter: none !important;
}

/* option text */
.qz-c span { flex: 1; }

/* answered states */
.qz-c.ok  { border-color: #16a34a !important; background: #f0fdf4 !important; cursor: default !important; }
.qz-c.err { border-color: #dc2626 !important; background: #fef2f2 !important; cursor: default !important; }
.qz-c.rev { border-color: #16a34a !important; background: #f0fdf4 !important; cursor: default !important; opacity: .7; }
[data-md-color-scheme="slate"] .qz-c.ok  { background: #052e16 !important; }
[data-md-color-scheme="slate"] .qz-c.err { background: #3b0a0a !important; }
[data-md-color-scheme="slate"] .qz-c.rev { background: #052e16 !important; }

/* pointer-events off when answered */
.qz-c.ok input, .qz-c.err input, .qz-c.rev input { pointer-events: none !important; }

/* explanation */
.qz-explain {
  margin: 0 1.1rem .9rem;
  padding: .7rem .9rem;
  background: #eff6ff;
  border-left: 3px solid #3b82f6;
  border-radius: 0 5px 5px 0;
  font-size: .84rem;
  line-height: 1.6;
}
[data-md-color-scheme="slate"] .qz-explain { background: #172554; border-left-color: #60a5fa; }
.qz-explain strong {
  display: block;
  margin-bottom: .25rem;
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: #1d4ed8;
}
[data-md-color-scheme="slate"] .qz-explain strong { color: #93c5fd; }

/* confirm wrap */
.qz-confirm-wrap { padding: 0 1.1rem .85rem; }

/* footer */
.qz-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .6rem 1.1rem 1rem;
}
.qz-verdict     { font-size: .88rem; font-weight: 700; }
.qz-verdict.ok  { color: #16a34a; }
.qz-verdict.err { color: #dc2626; }
[data-md-color-scheme="slate"] .qz-verdict.ok  { color: #4ade80; }
[data-md-color-scheme="slate"] .qz-verdict.err { color: #f87171; }

/* buttons */
.qz-btn {
  padding: .45em 1.2em !important;
  border: none !important;
  border-radius: 5px !important;
  font-family: inherit !important;
  font-size: .85rem !important;
  font-weight: 600 !important;
  cursor: pointer !important;
  transition: opacity .15s !important;
  box-shadow: none !important;
  -webkit-appearance: none !important;
}
.qz-btn:hover:not(:disabled) { opacity: .85 !important; }
.qz-btn:disabled { opacity: .35 !important; cursor: default !important; }
.qz-btn-p { background: var(--md-primary-fg-color) !important; color: #fff !important; }
.qz-btn-a { background: var(--md-accent-fg-color) !important; color: #fff !important; }
.qz-btn-g { background: var(--md-default-fg-color--lightest) !important; color: var(--md-default-fg-color) !important; }

/* start screen */
.qz-start { padding: 2.5rem 1.8rem; text-align: center; }
.qz-start-icon  { font-size: 2.4rem; line-height: 1; margin-bottom: .45rem; }
.qz-start-title { margin: .1rem 0 .75rem; font-size: 1.15rem; font-weight: 700; color: var(--md-primary-fg-color); }
.qz-start-chips { display: flex; justify-content: center; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.6rem; }
.qz-chip {
  font-size: .77rem;
  padding: .25rem .7rem;
  border-radius: 20px;
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color);
}

/* results */
.qz-results  { padding: 2rem 1.6rem; text-align: center; }
.qz-res-big  { font-size: 3.8rem; font-weight: 800; letter-spacing: -.04em; line-height: 1; }
.qz-res-big.ok  { color: #16a34a; }
.qz-res-big.err { color: #dc2626; }
.qz-res-sub  { font-size: .87rem; color: var(--md-default-fg-color--light); margin: .25rem 0 1.2rem; }
.qz-res-chips { display: flex; justify-content: center; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.4rem; }
.qz-chip-ok  { background: #dcfce7; color: #14532d; }
.qz-chip-err { background: #fee2e2; color: #7f1d1d; }
[data-md-color-scheme="slate"] .qz-chip-ok  { background: #052e16; color: #86efac; }
[data-md-color-scheme="slate"] .qz-chip-err { background: #3b0a0a; color: #fca5a5; }
.qz-res-btns { display: flex; justify-content: center; gap: .7rem; flex-wrap: wrap; }
.qz-time-up  { font-size: .84rem; color: #dc2626; margin-bottom: .75rem; }

/* ══════════════════════════════════════════════════════════════════════
   PERMISSIONS CALCULATOR
   ══════════════════════════════════════════════════════════════════════ */

.pc-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.pc-section {
  flex: 1 1 320px;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  padding: 1.2rem 1.4rem;
  background: var(--md-default-bg-color);
}
.pc-h {
  margin: 0 0 1rem !important;
  font-size: .95rem !important;
  border: none !important;
  padding: 0 !important;
  color: var(--md-primary-fg-color) !important;
}
.pc-grid {
  display: grid;
  grid-template-columns: 6rem 2.5rem 2.5rem 2.5rem 2.5rem;
  align-items: center;
  gap: .25rem .1rem;
  margin-bottom: 1rem;
}
.pc-col-head {
  font-size: .72rem;
  font-weight: 700;
  text-align: center;
  color: var(--md-default-fg-color--light);
  padding-bottom: .25rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
}
.pc-row-label {
  font-size: .82rem;
  font-weight: 600;
}
.pc-cb {
  display: flex !important;
  justify-content: center !important;
  padding: 0 !important;
  margin: 0 !important;
  border: none !important;
  background: none !important;
  cursor: pointer !important;
}
.pc-cb input[type="checkbox"] {
  -webkit-appearance: auto !important;
  appearance: auto !important;
  width: 1.1em !important;
  height: 1.1em !important;
  border: initial !important;
  background: initial !important;
  opacity: 1 !important;
  margin: 0 !important;
  cursor: pointer !important;
  accent-color: var(--md-accent-fg-color) !important;
}
.pc-digit {
  text-align: center;
  font-weight: 700;
  font-size: .9rem;
  color: var(--md-primary-fg-color);
  font-variant-numeric: tabular-nums;
}
.pc-result-row, .pc-umask-row {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-top: .5rem;
  flex-wrap: wrap;
}
.pc-label {
  font-size: .8rem;
  color: var(--md-default-fg-color--light);
  min-width: 11rem;
}
.pc-code {
  font-size: .9rem !important;
  padding: .15em .5em !important;
  background: var(--md-code-bg-color) !important;
  font-weight: 700 !important;
}
.pc-input {
  width: 5rem;
  padding: .3em .6em;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 5px;
  font-family: var(--md-code-font);
  font-size: .9rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  text-align: center;
}
.pc-input:focus {
  outline: 2px solid var(--md-accent-fg-color);
  border-color: transparent;
}

/* ── Кнопка печати ──────────────────────────────────────────────────── */
.print-btn {
  position: fixed;
  bottom: 4.5rem;
  right: 1rem;
  z-index: 10;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  border: none;
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color);
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
  transition: background .15s, transform .1s;
  opacity: .7;
}
.print-btn:hover { background: var(--md-primary-fg-color); color: #fff; opacity: 1; transform: scale(1.05); }

/* ── Print styles ───────────────────────────────────────────────────── */
@media print {
  .md-header, .md-sidebar, .md-footer, .md-tabs,
  .md-top, .progress-widget, .md-search { display: none !important; }
  .md-main { padding: 0 !important; }
  .md-content { margin: 0 !important; max-width: 100% !important; }
  .md-typeset { font-size: 11pt; line-height: 1.5; }
  .md-typeset h1 { font-size: 18pt; page-break-before: always; }
  .md-typeset h2 { font-size: 14pt; }
  .md-typeset pre { border: 1px solid #ccc; white-space: pre-wrap; }
  a[href]:after { content: none; }
}