/*  ═══════════════════════════════════════════════════════════════
    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; }

/* ── 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; }

/* ── 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; }
  .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: 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: always; }
  h2.section-title:first-of-type { page-break-before: avoid; }
  @page { margin: 1.8cm 2cm; }
}

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .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; }
}