/* ==========================================================================
   Pupil Zone Maths — design tokens
   The worksheet preview looks like a page from a maths exercise book:
   squared paper with a margin line. Everything around it stays quiet.
   ========================================================================== */
:root {
  --pz-blue: #0859C5;
  --pz-blue-dark: #06449A;
  --pz-ink: #1B2A4A;
  --pz-muted: #5B6780;
  --pz-desk: #EEF3FA;
  --pz-grid: #DCE6F5;
  --pz-margin: #E7A3A3;
  --pz-pencil: #F5B82E;
  --pz-correct: #2E8B57;
  --pz-retry: #B83A26;
  --pz-radius-lg: 14px;
  --pz-radius-sm: 8px;
  --pz-ui: 'Lexend', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --pz-sheet: 'Andika', 'Lexend', system-ui, sans-serif;
}

body {
  font-family: var(--pz-ui);
  color: var(--pz-ink);
  background: var(--pz-desk);
  font-size: 1rem;
  line-height: 1.55;
}
a { color: var(--pz-blue); }
a:hover { color: var(--pz-blue-dark); }

/* Visible keyboard focus everywhere: a pencil-yellow ring. */
:focus-visible {
  outline: 3px solid var(--pz-pencil);
  outline-offset: 2px;
}
.skip-link {
  position: absolute; left: -999px; top: 8px;
  background: #fff; padding: 8px 14px; border-radius: var(--pz-radius-sm); z-index: 10;
}
.skip-link:focus { left: 8px; }

/* ---------- Top bar & footer ---------- */
.pz-topbar {
  background: #fff;
  border-bottom: 1px solid var(--pz-grid);
  padding: 10px 0;
}
.pz-brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--pz-ink); text-decoration: none; font-size: 1.05rem;
}
.pz-brand img { object-fit: contain; border-radius: 6px; background: #fff; }
.pz-brand strong { color: var(--pz-blue); font-weight: 700; }
.pz-nav { display: flex; gap: 20px; font-size: .95rem; }
.pz-nav a { color: var(--pz-muted); text-decoration: none; }
.pz-nav a[aria-current="page"], .pz-nav a:hover { color: var(--pz-blue); }
.pz-footer { padding: 28px 0 36px; color: var(--pz-muted); font-size: .9rem; }

/* ---------- Intro ---------- */
.pz-intro { padding: 36px 0 20px; max-width: 46rem; }
.pz-intro h1 {
  font-weight: 700; font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 10px;
}
.pz-intro p { color: var(--pz-muted); font-size: 1.08rem; margin: 0; }

/* ---------- Maker panel ---------- */
.pz-panel {
  background: #fff;
  border-radius: var(--pz-radius-lg);
  border: 1px solid var(--pz-grid);
  padding: 22px 20px;
}
@media (min-width: 992px) {
  .pz-panel { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow-y: auto; }
}
.pz-step + .pz-step { margin-top: 22px; padding-top: 20px; border-top: 1px dashed var(--pz-grid); }
.pz-step-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 1rem; font-weight: 600; margin-bottom: 12px;
}
.pz-step-num {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--pz-blue); color: #fff; font-size: .85rem;
  display: inline-flex; align-items: center; justify-content: center; flex: none;
}

/* Segmented choice buttons (country, level) */
.pz-seg { display: flex; gap: 6px; flex-wrap: wrap; }
.pz-seg button {
  flex: 1 1 0; min-width: 0;
  border: 1.5px solid var(--pz-grid); background: #fff; color: var(--pz-ink);
  border-radius: var(--pz-radius-sm); padding: 8px 10px; font-size: .92rem; font-weight: 500;
}
.pz-seg button[aria-pressed="true"] { border-color: var(--pz-blue); background: var(--pz-blue); color: #fff; }
.pz-seg button:not([aria-pressed="true"]):hover { border-color: var(--pz-blue); }

/* Grade tiles */
.pz-grades { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.pz-grades button {
  border: 1.5px solid var(--pz-grid); background: #fff; border-radius: var(--pz-radius-sm);
  padding: 8px 6px; text-align: center; color: var(--pz-ink); line-height: 1.2;
}
.pz-grades button span { display: block; font-size: .75rem; color: var(--pz-muted); margin-top: 2px; }
.pz-grades button[aria-pressed="true"] { border-color: var(--pz-blue); box-shadow: inset 0 0 0 1.5px var(--pz-blue); }
.pz-grades button[aria-pressed="true"] strong { color: var(--pz-blue); }

/* Skill list */
.pz-topic { margin-bottom: 14px; }
.pz-topic h3 { font-size: .82rem; font-weight: 600; color: var(--pz-muted); margin: 0 0 6px; }
.pz-skill {
  display: block; position: relative;
  border: 1.5px solid transparent; border-radius: var(--pz-radius-sm);
  padding: 8px 10px 8px 36px; cursor: pointer; margin-bottom: 2px;
}
.pz-skill:hover { background: var(--pz-desk); }
.pz-skill input { position: absolute; left: 12px; top: 12px; accent-color: var(--pz-blue); }
.pz-skill-title { display: block; font-weight: 500; font-size: .95rem; }
.pz-skill-desc { display: block; font-size: .8rem; color: var(--pz-muted); }
.pz-skill:has(input:checked) { border-color: var(--pz-blue); background: #F4F8FE; }
.pz-empty-hint { color: var(--pz-muted); font-size: .9rem; margin: 0; }

.pz-count { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.pz-count label { font-size: .92rem; }
.pz-count input { width: 84px; }

.pz-btn-primary {
  width: 100%; margin-top: 18px;
  background: var(--pz-blue); color: #fff; border: 0; border-radius: var(--pz-radius-sm);
  padding: 12px 16px; font-weight: 600; font-size: 1.02rem;
}
.pz-btn-primary:hover { background: var(--pz-blue-dark); color: #fff; }
.pz-btn-primary:disabled { opacity: .6; }
.pz-form-error { color: var(--pz-retry); font-size: .9rem; margin: 10px 0 0; min-height: 1.2em; }

/* ---------- Toolbar ---------- */
.pz-toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; }
.pz-tool {
  border: 1.5px solid var(--pz-grid); background: #fff; color: var(--pz-ink);
  border-radius: var(--pz-radius-sm); padding: 8px 14px; font-size: .92rem; font-weight: 500;
  text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
}
.pz-tool:hover { border-color: var(--pz-blue); color: var(--pz-blue); }
.pz-tool.is-main { background: var(--pz-pencil); border-color: var(--pz-pencil); color: var(--pz-ink); font-weight: 600; }
.pz-tool.is-main:hover { filter: brightness(.96); color: var(--pz-ink); }
.pz-toolbar-status { font-size: .88rem; color: var(--pz-muted); }

/* ---------- The exercise-book sheet ---------- */
.pz-sheet {
  position: relative;
  background-color: #fff;
  background-image:
    linear-gradient(var(--pz-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--pz-grid) 1px, transparent 1px);
  background-size: 22px 22px;
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--pz-grid), 0 18px 40px -24px rgba(27, 42, 74, .35);
  padding: 34px 28px 40px 72px;
  min-height: 560px;
}
.pz-sheet::before {           /* the red margin line of an exercise book */
  content: ""; position: absolute; top: 0; bottom: 0; left: 52px;
  border-left: 2px solid var(--pz-margin);
}
.pz-sheet-head { background: #fff; padding: 4px 8px 12px; margin: -4px -8px 18px; }
.pz-sheet-title { font-family: var(--pz-sheet); font-weight: 700; font-size: 1.7rem; margin: 0; line-height: 1.2; }
.pz-sheet-meta { font-family: var(--pz-sheet); color: var(--pz-muted); margin: 2px 0 0; }
.pz-sheet-empty {
  font-family: var(--pz-sheet); font-size: 1.35rem; color: var(--pz-muted);
  background: #fff; display: inline-block; padding: 6px 10px; margin-top: 120px;
}
.pz-notice {
  background: #FFF6DE; border: 1px solid #F1D38A; border-radius: var(--pz-radius-sm);
  padding: 8px 12px; font-size: .9rem; margin-bottom: 16px;
}

.pz-questions { display: grid; gap: 18px 28px; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); }
.pz-q {
  font-family: var(--pz-sheet); font-size: 1.3rem; line-height: 1.45;
  background: rgba(255, 255, 255, .92); border-radius: 6px; padding: 6px 8px;
  position: relative;
}
.pz-q-num { font-family: var(--pz-ui); color: var(--pz-blue); font-weight: 600; font-size: .9rem; margin-right: 6px; }
.pz-q.is-word, .pz-q.is-visual-wide { grid-column: 1 / -1; }
.pz-q .pz-blank { display: inline-block; min-width: 64px; border-bottom: 2px solid var(--pz-ink); height: 1.1em; vertical-align: -2px; }
.pz-q-visual { margin: 8px 0 4px; }
.pz-q-visual svg { max-width: 100%; height: auto; display: block; }
.pz-q-choices { font-size: 1.05rem; color: var(--pz-muted); margin-top: 4px; }

/* Column arithmetic: digits share fixed columns so place values align. */
.pz-column {
  display: inline-grid; justify-items: end; font-variant-numeric: tabular-nums;
  font-size: 1.6rem; letter-spacing: .12em; margin-left: 22px; line-height: 1.25;
}
.pz-column .pz-column-bottom { border-bottom: 2.5px solid var(--pz-ink); padding-bottom: 2px; }
.pz-column .pz-column-op { margin-right: 10px; }
.pz-column .pz-column-answer { min-height: 1.5em; border-bottom: 2.5px solid var(--pz-ink); width: 100%; }

/* ---------- Practice page ---------- */
.pz-practice-head { padding: 26px 0 12px; }
.pz-practice-head h1 { font-family: var(--pz-sheet); font-weight: 700; font-size: clamp(1.7rem, 3.4vw, 2.3rem); margin: 0; }
.pz-progress { height: 10px; background: #fff; border-radius: 99px; border: 1px solid var(--pz-grid); overflow: hidden; }
.pz-progress > div { height: 100%; width: 0; background: var(--pz-pencil); transition: width .25s ease; }
.pz-practice-stats { display: flex; justify-content: space-between; font-size: .9rem; color: var(--pz-muted); margin-top: 6px; }

.pz-card {
  background: #fff; border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-lg);
  padding: 18px 20px; margin-bottom: 14px;
}
.pz-card .pz-q { background: none; padding: 0; font-size: 1.55rem; }
.pz-answer-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.pz-answer-row input {
  font-family: var(--pz-sheet); font-size: 1.5rem; width: 190px; max-width: 100%;
  border: 2px solid var(--pz-grid); border-radius: var(--pz-radius-sm); padding: 6px 12px;
}
.pz-answer-row input:focus { border-color: var(--pz-blue); outline: none; box-shadow: 0 0 0 3px var(--pz-pencil); }
.pz-unit { font-family: var(--pz-sheet); font-size: 1.3rem; color: var(--pz-muted); }
.pz-hint { font-size: .85rem; color: var(--pz-muted); width: 100%; margin: 0; }
.pz-choice-group { display: flex; flex-wrap: wrap; gap: 10px; }
.pz-choice {
  font-family: var(--pz-sheet); font-size: 1.45rem; min-width: 70px;
  border: 2px solid var(--pz-grid); background: #fff; border-radius: var(--pz-radius-sm); padding: 6px 18px;
}
.pz-choice[aria-pressed="true"] { border-color: var(--pz-blue); background: #F4F8FE; color: var(--pz-blue); }

.pz-card.is-correct { border-color: var(--pz-correct); }
.pz-card.is-retry { border-color: var(--pz-retry); }
.pz-feedback { margin-top: 12px; font-size: .98rem; }
.pz-card.is-correct .pz-feedback { color: var(--pz-correct); font-weight: 600; }
.pz-card.is-retry .pz-feedback strong { color: var(--pz-retry); }
.pz-steps { color: var(--pz-muted); margin: 4px 0 0; padding-left: 18px; }
.pz-report { font-size: .8rem; margin-top: 8px; }
.pz-report button { background: none; border: 0; padding: 0; color: var(--pz-muted); text-decoration: underline; }
.pz-report select, .pz-report input { font-size: .85rem; }

.pz-result {
  background: #fff; border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-lg);
  padding: 22px; margin: 6px 0 18px; text-align: center;
}
.pz-stars { font-size: 2.4rem; letter-spacing: .15em; color: var(--pz-pencil); line-height: 1; }
.pz-stars .is-off { color: var(--pz-grid); }
.pz-result h2 { font-family: var(--pz-sheet); font-weight: 700; margin: 10px 0 4px; }
.pz-sticky-actions {
  position: sticky; bottom: 0; background: linear-gradient(transparent, var(--pz-desk) 30%);
  padding: 22px 0 16px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
}
.pz-sticky-actions .pz-btn-primary { width: auto; margin: 0; padding: 12px 34px; }

/* ---------- Browse & SEO pages ---------- */
.pz-browse { margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--pz-grid); }
.pz-browse h2 { font-size: 1.35rem; font-weight: 700; margin-bottom: 16px; }
.pz-browse h3 { font-size: 1rem; font-weight: 600; }
.pz-browse ul { list-style: none; padding: 0; margin: 0; columns: 2; font-size: .92rem; }
.pz-browse li { margin-bottom: 4px; break-inside: avoid; }
.pz-crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 18px 0 0; margin: 0; font-size: .88rem; }
.pz-crumbs li + li::before { content: "›"; color: var(--pz-muted); margin-right: 6px; }
.pz-crumbs span { color: var(--pz-muted); }
.pz-grade-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.pz-grade-card {
  background: #fff; border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-lg);
  padding: 18px; text-decoration: none; color: var(--pz-ink); display: flex; flex-direction: column; gap: 2px;
}
.pz-grade-card strong { font-size: 1.25rem; color: var(--pz-blue); }
.pz-grade-card span { color: var(--pz-muted); font-size: .9rem; }
.pz-grade-card:hover { border-color: var(--pz-blue); }
.pz-topic-block { background: #fff; border: 1px solid var(--pz-grid); border-radius: var(--pz-radius-lg); padding: 18px 20px; margin-bottom: 14px; }
.pz-topic-block h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; }
.pz-link-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 10px 24px; }
.pz-link-list a { font-weight: 500; }
.pz-link-list span { display: block; font-size: .84rem; color: var(--pz-muted); }
.pz-facts { padding-left: 18px; color: var(--pz-ink); margin-bottom: 20px; }
.pz-facts li { margin-bottom: 4px; }

/* ---------- Accounts ---------- */
.pz-page { padding-top: 28px; padding-bottom: 20px; }
.pz-narrow { max-width: 480px; }
.pz-nav-account {
  border: 1.5px solid var(--pz-grid); border-radius: 99px; padding: 4px 14px; color: var(--pz-ink) !important;
}
.pz-nav-account:hover { border-color: var(--pz-blue); }
.pz-box { background: #fff; border: 1px solid var(--pz-grid); border-radius: var(--pz-radius-lg); padding: 24px; margin-bottom: 18px; }
.pz-box h1 { font-size: 1.6rem; font-weight: 700; margin-bottom: 6px; }
.pz-box h2 { font-size: 1.15rem; font-weight: 600; margin-bottom: 12px; }
.pz-box .form-label { font-weight: 500; font-size: .92rem; }
.pz-box .form-control, .pz-box .form-select { border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-sm); padding: 9px 12px; }
.pz-box .form-control:focus, .pz-box .form-select:focus { border-color: var(--pz-blue); box-shadow: 0 0 0 3px var(--pz-pencil); }
.pz-muted { color: var(--pz-muted); font-size: .92rem; }
.pz-flash { border-radius: var(--pz-radius-sm); padding: 10px 14px; margin-bottom: 16px; font-size: .95rem; }
.pz-flash-success { background: #E6F4EC; border: 1px solid #A9D8BD; }
.pz-flash-error { background: #FBE9E5; border: 1px solid #EDB3A7; }
.pz-flash-info { background: #FFF6DE; border: 1px solid #F1D38A; }
.pz-divider { display: flex; align-items: center; gap: 10px; color: var(--pz-muted); font-size: .85rem; margin: 16px 0; }
.pz-divider::before, .pz-divider::after { content: ""; flex: 1; border-top: 1px solid var(--pz-grid); }
.pz-google {
  display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%;
  border: 1.5px solid var(--pz-grid); background: #fff; border-radius: var(--pz-radius-sm); padding: 10px; color: var(--pz-ink); font-weight: 500; text-decoration: none;
}
.pz-google:hover { border-color: var(--pz-blue); color: var(--pz-ink); }
.pz-role { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.pz-role label { border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-sm); padding: 10px 12px; cursor: pointer; }
.pz-role label:has(input:checked) { border-color: var(--pz-blue); background: #F4F8FE; }
.pz-role span { display: block; font-size: .8rem; color: var(--pz-muted); }
.pz-children { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.pz-child { border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-lg); padding: 16px; background: #fff; }
.pz-child-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.pz-avatar { font-size: 2rem; line-height: 1; }
.pz-avatars { display: flex; flex-wrap: wrap; gap: 6px; }
.pz-avatars label { font-size: 1.6rem; border: 2px solid transparent; border-radius: 10px; padding: 2px 6px; cursor: pointer; }
.pz-avatars input { position: absolute; opacity: 0; }
.pz-avatars label:has(input:checked) { border-color: var(--pz-blue); background: #F4F8FE; }
.pz-avatars label:has(input:focus-visible) { outline: 3px solid var(--pz-pencil); }
.pz-code { font-family: var(--pz-sheet); font-size: 2.2rem; letter-spacing: .18em; font-weight: 700; color: var(--pz-blue); }
.pz-pin { font-family: var(--pz-sheet); font-size: 1.3rem; letter-spacing: .15em; font-weight: 700; }
.pz-score { display: inline-block; flex: none; align-self: flex-start; min-width: 48px; text-align: center; border-radius: 99px; padding: 1px 8px; font-weight: 600; font-size: .85rem; }
.pz-score-high { background: #E6F4EC; color: #1F6B42; }
.pz-score-mid { background: #FFF6DE; color: #7A5A00; }
.pz-score-low { background: #FBE9E5; color: #8E2E1E; }
.pz-danger { border-color: #EDB3A7; }
.btn-pz { background: var(--pz-blue); color: #fff; border: 0; border-radius: var(--pz-radius-sm); padding: 9px 18px; font-weight: 600; }
.btn-pz:hover { background: var(--pz-blue-dark); color: #fff; }
.btn-pz-light { background: #fff; color: var(--pz-ink); border: 1.5px solid var(--pz-grid); border-radius: var(--pz-radius-sm); padding: 8px 16px; font-weight: 500; }
.btn-pz-light:hover { border-color: var(--pz-blue); color: var(--pz-blue); }
.pz-linkbtn { background: none; border: 0; padding: 0; color: var(--pz-blue); text-decoration: underline; }
.pz-child-banner { background: var(--pz-pencil); border-radius: var(--pz-radius-sm); padding: 8px 14px; margin: 14px 0 0; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; font-weight: 500; }
/* ---------- Admin ---------- */
.pz-admin-body { background: #F4F6FA; }
.pz-admin-top { background: #fff; border-bottom: 1px solid var(--pz-grid); padding: 10px 20px; display: flex; align-items: center; gap: 16px; }
.pz-admin { display: grid; grid-template-columns: 220px 1fr; min-height: calc(100vh - 58px); }
.pz-admin-nav { background: #fff; border-right: 1px solid var(--pz-grid); padding: 18px 10px; display: flex; flex-direction: column; gap: 2px; }
.pz-admin-nav a { color: var(--pz-ink); text-decoration: none; padding: 8px 12px; border-radius: var(--pz-radius-sm); font-size: .93rem; }
.pz-admin-nav a:hover { background: var(--pz-desk); }
.pz-admin-nav a[aria-current="page"] { background: var(--pz-blue); color: #fff; }
.pz-admin-main { padding: 24px 28px 40px; min-width: 0; }
.pz-kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; margin-bottom: 18px; }
.pz-kpi { background: #fff; border: 1px solid var(--pz-grid); border-radius: var(--pz-radius-lg); padding: 14px 16px; }
.pz-kpi strong { display: block; font-size: 1.7rem; font-weight: 700; line-height: 1.1; }
.pz-kpi span { color: var(--pz-muted); font-size: .85rem; }
.pz-kpi.is-alert { border-color: var(--pz-pencil); background: #FFFBEF; }
.pz-admin-main .table { font-size: .9rem; }
.pz-admin-main .pz-sheet { min-height: 0; padding: 20px 20px 24px 60px; }
.pz-admin-main .pz-sheet::before { left: 42px; }
.pz-tag { display: inline-block; font-size: .75rem; padding: 1px 8px; border-radius: 99px; background: var(--pz-desk); color: var(--pz-muted); }
@media (max-width: 767.98px) {
  .pz-admin { grid-template-columns: 1fr; }
  .pz-admin-nav { flex-direction: row; flex-wrap: wrap; border-right: 0; border-bottom: 1px solid var(--pz-grid); }
}

@media print {
  .pz-no-print { display: none !important; }
}

@media (max-width: 575.98px) {
  .pz-sheet { padding: 24px 14px 30px 40px; }
  .pz-sheet::before { left: 26px; }
  .pz-questions { grid-template-columns: 1fr 1fr; gap: 14px; }
  .pz-q { font-size: 1.12rem; }
  .pz-column { font-size: 1.3rem; margin-left: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}
@media print {
  .pz-topbar, .pz-footer, .pz-panel, .pz-toolbar, .pz-intro { display: none !important; }
  body { background: #fff; }
  .pz-sheet { box-shadow: none; background-image: none; padding-left: 20px; }
  .pz-sheet::before { display: none; }
}