/*  ═══════════════════════════════════════════════════════════════
    TASA WORKBOOK — Shared Stylesheet
    Screen + Print optimised
    Colors: Navy #0F1A30  |  Orange #D4621A  |  Cream #F5F0E8
    Fonts : Barlow Condensed (headings)  |  Inter (body)
    ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700;800;900&family=Inter:wght@400;500;600;700&display=swap');

/* ── TOKENS ─────────────────────────────────────────────────── */
:root {
  --navy:        #0F1A30;
  --navy-mid:    #1E2E4A;
  --navy-light:  #2A3F60;
  --orange:      #D4621A;
  --orange-lt:   #E8762A;
  --orange-glow: rgba(212,98,26,0.12);
  --teal:        #2DD4BF;
  --cream:       #F5F0E8;
  --cream-dark:  #EDE8DF;
  --white:       #FFFFFF;
  --text-body:   #1A2035;
  --text-mid:    #4A5568;
  --text-light:  #718096;
  --warn:        #F59E0B;
  --danger:      #EF4444;
  --ok:          #10B981;
  --border:      rgba(15,26,48,0.10);
  --font-head:   'Barlow Condensed', 'Arial Narrow', sans-serif;
  --font-body:   'Inter', system-ui, sans-serif;
  --r:           6px;
}

/* ── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--text-body);
  line-height: 1.65;
}
a { color: var(--orange); text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── LAYOUT ─────────────────────────────────────────────────── */
.page-wrap { max-width: 900px; margin: 0 auto; padding: 0 24px 80px; }

/* ── WORKBOOK FRONT MATTER ───────────────────────────────────── */
.workbook-frontmatter { max-width: 900px; margin: 0 auto; }
.workbook-cover-page, .workbook-student-page, .workbook-contents-page {
  min-height: 10.2in; padding: 70px 64px; position: relative;
  page-break-after: always; break-after: page;
}
.workbook-contents-page { page-break-after: auto; break-after: auto; }
.workbook-cover-page {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; background: var(--navy); color: var(--white); overflow: hidden;
  border: 12px solid var(--navy); box-shadow: inset 0 0 0 1px rgba(255,255,255,.16);
}
.workbook-reference-cover-page { padding: 0; border: 0; background: #fff; }
.workbook-reference-cover { display: block; height: 100%; width: auto; max-width: 100%; object-fit: fill; position: relative; z-index: 1; }
.workbook-cover-page::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(45,212,191,.12), transparent 34%), repeating-linear-gradient(-55deg, transparent 0 40px, rgba(255,255,255,.025) 40px 41px); }
.workbook-cover-page::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 11px; background: linear-gradient(90deg, var(--orange), var(--orange-lt) 55%, var(--teal)); }
.workbook-cover-ribbon { position: absolute; top: 28px; right: -64px; z-index: 2; transform: rotate(45deg); padding: 7px 70px; background: var(--orange); color: var(--white); font-family: var(--font-head); font-size: 10px; font-weight: 900; letter-spacing: .12em; }
.workbook-cover-frame { position: absolute; inset: 24px; border: 1px solid rgba(255,255,255,.18); pointer-events: none; }
.workbook-cover-frame::before, .workbook-cover-frame::after { content: ''; position: absolute; width: 42px; height: 42px; border-color: var(--orange); border-style: solid; }
.workbook-cover-frame::before { top: -1px; left: -1px; border-width: 4px 0 0 4px; }
.workbook-cover-frame::after { right: -1px; bottom: -1px; border-width: 0 4px 4px 0; }
.workbook-cover-logo { width: 116px; height: 116px; border: 5px solid var(--orange); border-radius: 50%; object-fit: cover; position: relative; margin-bottom: 26px; box-shadow: 0 0 0 7px rgba(212,98,26,.14), 0 12px 32px rgba(0,0,0,.3); }
.workbook-kicker, .frontmatter-label { color: var(--orange); font-family: var(--font-head); font-weight: 800; letter-spacing: .16em; text-transform: uppercase; font-size: 13px; }
.workbook-cover-page h1 { position: relative; font-family: var(--font-head); font-size: clamp(52px, 9vw, 86px); line-height: .88; text-transform: uppercase; letter-spacing: .02em; margin: 14px 0 22px; text-shadow: 0 4px 0 rgba(0,0,0,.18); }
.workbook-cover-page h1 span { color: var(--orange); }
.workbook-cover-subtitle { position: relative; color: rgba(255,255,255,.76); font-size: 19px; max-width: 500px; letter-spacing: .02em; }
.workbook-cover-rule { position: relative; width: 180px; height: 4px; background: linear-gradient(90deg, var(--orange), var(--teal)); margin: 28px auto; }
.workbook-cover-meta { position: relative; display: flex; gap: 0; flex-wrap: wrap; justify-content: center; color: rgba(255,255,255,.62); font-family: var(--font-head); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.workbook-cover-meta span { padding: 0 16px; }
.workbook-cover-meta span + span { border-left: 1px solid rgba(255,255,255,.25); }
.workbook-cover-footer { position: absolute; bottom: 30px; left: 58px; right: 58px; z-index: 1; display: flex; justify-content: space-between; gap: 20px; color: rgba(255,255,255,.48); font-family: var(--font-head); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.workbook-cover-footer strong { color: var(--orange); font-weight: 900; }
.workbook-student-page, .workbook-contents-page { background: var(--white); border: 1px solid var(--border); }
.workbook-student-page h2, .workbook-contents-page h2 { font-family: var(--font-head); color: var(--navy); font-size: 42px; line-height: 1; text-transform: uppercase; margin: 18px 0 44px; }
.student-form-line { min-height: 52px; border-bottom: 2px solid var(--navy); flex: 1; position: relative; }
.student-form-line span { position: absolute; bottom: 7px; left: 0; color: var(--text-light); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.student-form-row, .student-signature-row { display: flex; gap: 34px; margin-top: 42px; }
.student-welcome { margin-top: 78px; padding: 24px 28px; background: var(--orange-glow); border-left: 5px solid var(--orange); }
.student-welcome h3 { margin: 0 0 14px; border: 0; padding: 0; font-size: 21px; }
.student-welcome p { font-size: 14px; color: var(--text-mid); }
.frontmatter-footer { position: absolute; bottom: 28px; left: 64px; right: 64px; color: var(--text-light); text-align: center; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; }
.frontmatter-contents { border-top: 3px solid var(--orange); }
.frontmatter-contents > div { display: grid; grid-template-columns: 58px 1fr auto; gap: 14px; align-items: baseline; padding: 16px 0; border-bottom: 1px solid var(--border); }
.frontmatter-contents b { color: var(--orange); font-family: var(--font-head); font-size: 24px; }
.frontmatter-contents span { color: var(--navy); font-family: var(--font-head); font-weight: 800; font-size: 20px; text-transform: uppercase; letter-spacing: .03em; }
.frontmatter-contents em { color: var(--text-light); font-size: 12px; font-style: normal; white-space: nowrap; }
.frontmatter-note { margin-top: 42px; padding: 18px; background: var(--cream); color: var(--text-mid); font-size: 13px; }

/* ── LESSON NOTES ────────────────────────────────────────────── */
.lesson-notes { margin: 18px 0 24px; padding: 12px 16px 10px; border: 1.5px solid rgba(212,98,26,.28); border-radius: var(--r); background: rgba(212,98,26,.035); break-inside: avoid; }
.lesson-notes-title { color: var(--orange); font-family: var(--font-head); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 5px; }
.lesson-notes-line { height: 25px; border-bottom: 1px solid rgba(15,26,48,.2); }
.sample-workbook .lesson-notes:not(.chapter-notes) { display: none; }

/* ── UNIT COVER ─────────────────────────────────────────────── */
.unit-cover {
  background: var(--navy);
  color: var(--white);
  padding: 64px 48px 56px;
  margin-bottom: 48px;
  position: relative;
  overflow: hidden;
  border-radius: 0 0 var(--r) var(--r);
}
.unit-cover::before {
  content: '';
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    -55deg,
    transparent 0px, transparent 40px,
    rgba(255,255,255,0.02) 40px, rgba(255,255,255,0.02) 41px
  );
}
.unit-cover .unit-label {
  font-family: var(--font-head);
  font-size: 13px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--orange); margin-bottom: 12px;
}
.unit-cover h1 {
  font-family: var(--font-head);
  font-size: clamp(36px,6vw,64px); font-weight: 900; line-height: 1.05;
  text-transform: uppercase; letter-spacing: .02em;
}
.unit-cover .unit-sub {
  font-size: 17px; color: rgba(255,255,255,0.65); margin-top: 14px; max-width: 580px;
}
.unit-cover .unit-meta {
  display: flex; gap: 32px; margin-top: 32px; flex-wrap: wrap;
}
.unit-cover .meta-item { text-align: center; }
.unit-cover .meta-num {
  font-family: var(--font-head); font-size: 36px; font-weight: 900; color: var(--orange); line-height: 1;
}
.unit-cover .meta-lbl { font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: rgba(255,255,255,.5); }

/* Orange stripe accent */
.unit-cover .accent-stripe {
  position: absolute; bottom: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg, var(--orange), var(--orange-lt), transparent);
}

/* ── SECTION HEADING ─────────────────────────────────────────── */
.section-title {
  font-family: var(--font-head);
  font-size: 26px; font-weight: 800; text-transform: uppercase;
  letter-spacing: .04em; color: var(--navy);
  border-left: 5px solid var(--orange); padding-left: 14px;
  margin: 48px 0 20px;
}
.section-title.sub {
  font-size: 19px; font-weight: 700;
  border-left-width: 3px; color: var(--navy-mid);
}

/* ── BODY TEXT ───────────────────────────────────────────────── */
.prose p { margin-bottom: 14px; }
.prose ul, .prose ol { padding-left: 22px; margin-bottom: 14px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--navy); }

/* ── CALLOUT BOXES ───────────────────────────────────────────── */
.callout {
  border-radius: var(--r); padding: 18px 20px 16px;
  margin: 24px 0; position: relative;
}
.callout-title {
  font-family: var(--font-head); font-size: 13px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 8px;
  display: flex; align-items: center; gap: 8px;
}
.callout-title .icon { font-size: 18px; }
.callout.tip   { background: var(--orange-glow); border-left: 4px solid var(--orange); }
.callout.tip   .callout-title { color: var(--orange); }
.callout.warn  { background: rgba(245,158,11,0.10); border-left: 4px solid var(--warn); }
.callout.warn  .callout-title { color: var(--warn); }
.callout.danger{ background: rgba(239,68,68,0.08); border-left: 4px solid var(--danger); }
.callout.danger .callout-title { color: var(--danger); }
.callout.ok    { background: rgba(16,185,129,0.08); border-left: 4px solid var(--ok); }
.callout.ok    .callout-title { color: var(--ok); }
.callout.navy  { background: var(--navy); color: var(--white); border-left: 4px solid var(--orange); }
.callout.navy  .callout-title { color: var(--orange); }
.callout.navy p { color: rgba(255,255,255,0.85); }

/* ── LAUGH BOX (Chris's humour callouts) ─────────────────────── */
.laugh {
  background: var(--cream-dark); border-radius: var(--r);
  padding: 16px 20px; margin: 20px 0;
  border: 1px dashed rgba(212,98,26,0.35);
  font-style: italic; font-size: 15px; color: var(--text-mid);
}
.laugh::before { content: '😄 '; font-style: normal; font-size: 18px; }

/* ── DEFINITION / KEY TERM ───────────────────────────────────── */
.key-terms { margin: 24px 0; }
.term-row {
  display: grid; grid-template-columns: 180px 1fr;
  gap: 12px 20px; padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.term-row:last-child { border-bottom: none; }
.term-word {
  font-weight: 700; color: var(--orange); font-size: 14px;
  text-transform: uppercase; letter-spacing: .04em; padding-top: 2px;
}
.term-def { font-size: 15px; }

/* ── STUDY GUIDE SUPPORT ─────────────────────────────────────── */
.study-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; margin:20px 0 28px; }
.study-card { background:var(--white); border:1px solid var(--border); border-left:4px solid var(--orange); border-radius:var(--r); padding:16px 18px; }
.study-card h3 { margin:0 0 6px; color:var(--navy); font-family:var(--font-head); font-size:18px; text-transform:uppercase; letter-spacing:.03em; }
.study-card p { margin:0; font-size:14px; color:var(--text-mid); }
.reference-table { font-size:13px; }
.quick-sheet { display:grid; gap:0; border:1px solid var(--border); border-radius:var(--r); overflow:hidden; }
.quick-sheet > div { display:grid; grid-template-columns:150px 1fr; gap:16px; padding:12px 14px; border-bottom:1px solid var(--border); }
.quick-sheet > div:last-child { border-bottom:0; }
.quick-sheet strong { color:var(--orange); font-family:var(--font-head); text-transform:uppercase; letter-spacing:.04em; }
.quick-sheet span { color:var(--text-mid); }
.exam-list { padding-left:26px; margin:0; }
.exam-list li { margin:0 0 18px; padding-left:4px; font-size:14px; break-inside:avoid; }
.exam-list li::marker { color:var(--orange); font-weight:800; }
.exam-list .choices { margin-top:6px; color:var(--text-mid); line-height:1.55; }
.answer-note { margin-top:8px; color:var(--text-mid); font-size:13px; }

/* ── DATA TABLES ─────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
.data-table th {
  background: var(--navy); color: var(--white);
  padding: 10px 14px; text-align: left;
  font-family: var(--font-head); font-size: 13px; letter-spacing: .06em; text-transform: uppercase;
}
.data-table td { padding: 9px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.data-table tr:nth-child(even) td { background: rgba(15,26,48,0.04); }
.data-table .code { font-family: monospace; font-size: 13px; font-weight: 700; color: var(--orange); }
.data-table .brand-header td {
  background: var(--navy-mid); color: var(--white);
  font-weight: 700; font-size: 13px; letter-spacing: .04em;
}

/* ── STEP LIST ───────────────────────────────────────────────── */
.steps { counter-reset: step; list-style: none; padding: 0; margin: 20px 0; }
.steps li {
  counter-increment: step;
  display: flex; flex-direction: row;
  gap: 16px; margin-bottom: 16px; align-items: flex-start;
}
.steps li::before {
  content: counter(step);
  background: var(--orange); color: var(--white);
  font-family: var(--font-head); font-size: 18px; font-weight: 900;
  min-width: 36px; width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px;
}
.steps li > .step-content { flex: 1; min-width: 0; }
.steps li strong { display: block; font-size: 16px; margin-bottom: 4px; }
.steps li p { font-size: 15px; color: var(--text-mid); margin: 0; }

/* ── PPE CHECKLIST ───────────────────────────────────────────── */
.ppe-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px,1fr));
  gap: 12px; margin: 20px 0;
}
.ppe-item {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--r); padding: 14px 16px;
  display: flex; align-items: flex-start; gap: 10px;
}
.ppe-item .ppe-icon { font-size: 24px; flex-shrink: 0; }
.ppe-item .ppe-name { font-size: 13px; font-weight: 600; color: var(--navy); }
.ppe-item .ppe-note { font-size: 12px; color: var(--text-light); }

/* ── LAB EXERCISE ────────────────────────────────────────────── */
.lab-box {
  background: var(--navy); color: var(--white);
  border-radius: var(--r); overflow: hidden; margin: 32px 0;
}
.lab-header {
  background: var(--orange); padding: 14px 22px;
  display: flex; align-items: center; gap: 12px;
}
.lab-header .lab-icon { font-size: 22px; }
.lab-header h3 {
  font-family: var(--font-head); font-size: 20px; font-weight: 800;
  text-transform: uppercase; letter-spacing: .04em; color: var(--white);
}
.lab-header .lab-time {
  margin-left: auto; background: rgba(0,0,0,0.25);
  padding: 4px 10px; border-radius: 20px;
  font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
}
.lab-body { padding: 22px 24px; }
.lab-body p, .lab-body li { color: rgba(255,255,255,0.82); font-size: 15px; }
.lab-body ul, .lab-body ol { padding-left: 20px; margin-bottom: 12px; }
.lab-body li { margin-bottom: 6px; }

/* ── WRITE-IN LINES ──────────────────────────────────────────── */
.writein { margin: 8px 0 20px; }
.writein-label { font-size: 12px; font-weight: 600; color: var(--text-mid); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px; }
.writein-line {
  border: none; border-bottom: 1.5px solid rgba(15,26,48,0.25);
  display: block; width: 100%; height: 32px; background: transparent;
  font-family: var(--font-body); font-size: 15px; color: var(--text-body);
  margin-bottom: 4px; outline: none;
}
.writein-line:focus { border-bottom-color: var(--orange); }
.writein-area {
  border: 1.5px solid rgba(15,26,48,0.20); border-radius: var(--r);
  width: 100%; padding: 10px 12px; min-height: 80px; resize: vertical;
  background: var(--white); font-family: var(--font-body); font-size: 15px;
  outline: none; margin-top: 4px;
}
.writein-area:focus { border-color: var(--orange); }

/* ── KNOWLEDGE CHECK ─────────────────────────────────────────── */
.quiz-box {
  background: var(--white); border: 2px solid var(--navy);
  border-radius: var(--r); margin: 32px 0; overflow: hidden;
}
.quiz-header {
  background: var(--navy); padding: 14px 22px;
  font-family: var(--font-head); font-size: 18px; font-weight: 800;
  text-transform: uppercase; letter-spacing: .06em; color: var(--white);
  display: flex; align-items: center; gap: 10px;
}
.quiz-body { padding: 22px 24px; }
.quiz-q { margin-bottom: 22px; }
.quiz-q-text { font-weight: 600; font-size: 15px; margin-bottom: 10px; }
.quiz-opts { list-style: none; padding: 0; }
.quiz-opts li {
  display: flex; align-items: baseline; gap: 10px;
  font-size: 15px; margin-bottom: 7px;
}
.quiz-opts .opt-letter {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--navy-light); display: flex;
  align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; flex-shrink: 0;
  color: var(--navy-light);
}
.quiz-short textarea { width: 100%; margin-top: 8px; }

/* ── UNIT REVIEW TEST ────────────────────────────────────────── */
.test-header {
  background: var(--orange); color: var(--white);
  padding: 20px 28px; border-radius: var(--r) var(--r) 0 0;
  font-family: var(--font-head); font-size: 22px; font-weight: 900;
  text-transform: uppercase; letter-spacing: .06em;
}
.test-body {
  border: 2px solid var(--orange); border-top: none;
  border-radius: 0 0 var(--r) var(--r); padding: 24px 28px; margin-bottom: 40px;
}
.test-question { margin-bottom: 28px; }
.test-question .q-num {
  font-family: var(--font-head); font-size: 13px; font-weight: 700;
  color: var(--orange); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 4px;
}
.test-question p { font-weight: 600; font-size: 15px; margin-bottom: 10px; }

/* ── SCORE BOX ───────────────────────────────────────────────── */
.score-box {
  border: 2px solid var(--border); border-radius: var(--r);
  padding: 16px 20px; margin: 20px 0; display: flex;
  align-items: center; gap: 20px; flex-wrap: wrap;
}
.score-field { display: flex; flex-direction: column; gap: 4px; }
.score-field label { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--text-light); }
.score-field input { border: none; border-bottom: 2px solid var(--navy); width: 120px; font-size: 16px; font-weight: 700; background: transparent; outline: none; padding: 4px 0; }

/* ── APP CALLOUT ─────────────────────────────────────────────── */
.app-callout {
  background: linear-gradient(135deg, var(--navy) 0%, #1E3A5F 100%);
  border-radius: var(--r); overflow: hidden; margin: 28px 0;
  border: 1px solid rgba(0,200,255,0.20);
}
.app-callout-header {
  background: rgba(0,184,248,0.15); padding: 12px 20px;
  display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid rgba(0,200,255,0.15);
}
.app-callout-header .app-badge {
  background: #00B8F8; color: #0A0A0A;
  font-family: var(--font-head); font-size: 12px; font-weight: 800;
  letter-spacing: .06em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 20px;
}
.app-callout-header span { font-size: 14px; font-weight: 600; color: #00B8F8; }
.app-callout-body { padding: 18px 20px; color: rgba(255,255,255,0.85); font-size: 15px; }
.app-callout-body ul { padding-left: 20px; }
.app-callout-body li { margin-bottom: 6px; color: rgba(255,255,255,0.82); }

/* ── PAGE NAV (screen only) ──────────────────────────────────── */
.top-nav {
  background: var(--navy); color: var(--white);
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; height: 56px;
  padding: 0 24px; gap: 12px;
}
.top-nav .nav-home {
  font-family: var(--font-head); font-size: 15px; font-weight: 800;
  letter-spacing: .06em; text-transform: uppercase; color: var(--white);
  text-decoration: none; display: flex; align-items: center; gap: 8px;
}
.top-nav .nav-home img { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; }
.top-nav .nav-title {
  font-family: var(--font-head); font-size: 13px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--orange); margin-left: auto;
}

/* ── DIAGRAM PLACEHOLDER ─────────────────────────────────────── */
.diagram {
  background: var(--white); border: 1.5px solid var(--border);
  border-radius: var(--r); padding: 32px 24px; margin: 20px 0;
  text-align: center;
}
.diagram-label {
  font-size: 12px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-light); margin-top: 10px;
}
.diagram svg { max-width: 100%; height: auto; }

/* ── CERT STUB ───────────────────────────────────────────────── */
.cert {
  border: 6px double var(--orange); border-radius: 12px;
  padding: 60px 48px; text-align: center;
  background: var(--white); margin: 40px 0;
}
.cert .cert-logo { margin: 0 auto 20px; width: 80px; }
.cert h2 {
  font-family: var(--font-head); font-size: 42px; font-weight: 900;
  text-transform: uppercase; letter-spacing: .06em; color: var(--navy);
}
.cert .cert-name-line {
  border-bottom: 2px solid var(--navy); width: 300px;
  margin: 28px auto 8px; height: 40px;
}
.cert .cert-sig-row { display: flex; justify-content: space-around; margin-top: 48px; }
.cert .sig-block { text-align: center; }
.cert .sig-line { border-top: 1.5px solid var(--navy); width: 180px; padding-top: 6px; font-size: 12px; color: var(--text-mid); }

/* ── PRINT ───────────────────────────────────────────────────── */
@media print {
  body { background: #fff; font-size: 11pt; color: #000; }
  .top-nav { display: none; }
  .page-wrap { max-width: 100%; padding: 0; }
  .workbook-cover-page, .workbook-student-page, .workbook-contents-page { height: calc(11in - 0.9in); min-height: 0; overflow: hidden; }
  .workbook-cover-page:last-child, .workbook-student-page:last-child, .workbook-contents-page:last-child { page-break-after: auto; break-after: auto; }
  .workbook-reference-cover-page { height: calc(11in - 0.9in); }
  .workbook-reference-cover { height: 100%; width: auto; max-width: 100%; }
  .lesson-notes-line { height: 30px; }

  .unit-cover { background: #fff !important; color: #000 !important; border: 3px solid #0F1A30; page-break-after: always; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  .unit-cover h1 { color: #0F1A30; }
  .unit-cover .unit-sub { color: #4A5568; }
  .unit-cover .meta-num { color: #D4621A; }
  .unit-cover .meta-lbl { color: #718096; }
  .section-title { page-break-after: avoid; }
  .lab-box { page-break-inside: avoid; background: #fff !important; color: #000 !important; border: 2px solid #0F1A30; }
  .lab-header { background: #D4621A !important; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  .lab-body p, .lab-body li { color: #000 !important; }
  .quiz-box, .test-body { page-break-inside: auto; }
  .exam-list li { break-inside: avoid; }
  .study-card, .quick-sheet > div { break-inside: avoid; }
  .callout.navy { background: #fff !important; color: #000 !important; border-left: 4px solid #D4621A; }
  .callout.navy p { color: #000 !important; }
  .data-table th { background: #0F1A30 !important; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  .app-callout { background: #fff !important; border: 1.5px solid #0F1A30; }
  .app-callout-header { background: #fff !important; border-bottom: 1px solid #ccc; }
  .app-callout-header span, .app-callout-body { color: #000 !important; }
  .app-callout-body li { color: #000 !important; }
  .laugh { background: #f9f9f9 !important; border: 1px dashed #ccc; }
  .writein-area, .writein-line { background: #fff !important; }
  h2.section-title { page-break-before: auto; }
  @page { margin: 1.8cm 2cm; }
}

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .workbook-cover-page, .workbook-student-page, .workbook-contents-page { padding: 48px 28px; }
  .workbook-cover-ribbon { right: -76px; }
  .workbook-cover-footer { left: 28px; right: 28px; flex-direction: column; align-items: center; gap: 6px; }
  .workbook-cover-meta span { padding: 4px 9px; }
  .workbook-cover-meta span + span { border-left: 0; }
  .student-form-row, .student-signature-row { flex-direction: column; gap: 28px; }
  .frontmatter-contents > div { grid-template-columns: 48px 1fr; }
  .frontmatter-contents em { grid-column: 2; }
  .unit-cover { padding: 40px 24px 36px; }
  .term-row { grid-template-columns: 1fr; }
  .ppe-grid { grid-template-columns: repeat(2,1fr); }
  .score-box { flex-direction: column; }
}