/* ============================================================
   curriculum.css — Shared styles for curriculum pages
   Works alongside root style.css (which supplies base tokens:
   --bg, --surface, --surface-2, --border, --border-strong,
   --text, --muted, --accent, --accent-bg, --hl, --hl-bg,
   --green, --green-bg, --amber, --amber-bg,
   --font-display, --font-body, --font-mono,
   --max-w, --radius, --transition)
   ============================================================ */

/* ── CURRICULUM TOKENS ───────────────────────────────────────── */
:root {
  --curr-max-w:  1200px;
  --curr-nav-h:  54px;   /* matches site-header height */

  /* 4 content section accent colours */
  --c-study:    #2c5f6e;
  --c-quiz:     #8b6520;
  --c-paper2:   #4a3d7a;
  --c-refs:     #2d7a6a;

  /* topic-group hero palette (set via inline --topic-* vars) */
  --c-a-text:   #2c5f6e;  --c-a-bg: #e8f0f2;  --c-a-border: #c4d8de;
  --c-b-text:   #1a5cb8;  --c-b-bg: #eef3fb;  --c-b-border: #b8d0f0;
  --c-c-text:   #3d6b4a;  --c-c-bg: #f0f7f2;  --c-c-border: #b8d8c4;
}

/* ── BREADCRUMB ──────────────────────────────────────────────── */
.topic-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
  letter-spacing: 0.03em;
}
.topic-breadcrumb a { color: var(--accent); text-decoration: none; }
.topic-breadcrumb a:hover { text-decoration: underline; }
.topic-breadcrumb .sep { margin: 0 0.4rem; color: var(--border-strong); }

/* ── TOPIC HERO ──────────────────────────────────────────────── */
.topic-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 3rem 2rem 2.5rem;
}
.topic-hero-inner {
  max-width: var(--curr-max-w);
  margin: 0 auto;
}

.topic-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.topic-code {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--topic-color, var(--accent));
  background: var(--topic-bg, var(--accent-bg));
  border: 1px solid var(--topic-border, #b8d0f0);
  padding: 0.28rem 0.75rem;
  border-radius: 2px;
}
.topic-level {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
}
.level-sl   { background: var(--accent-bg); color: var(--accent); }
.level-hl   { background: var(--hl-bg);     color: var(--hl);     }
.level-slhl { background: var(--accent-bg); color: var(--accent); }

.topic-title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.5rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.topic-guiding-q {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
  padding: 0.75rem 1rem;
  border-left: 3px solid var(--topic-color, var(--accent));
  background: var(--topic-bg, var(--accent-bg));
  border-radius: 0 var(--radius) var(--radius) 0;
}
.topic-guiding-q .gq-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--topic-color, var(--accent));
  margin-bottom: 0.35rem;
}

/* ── TOPIC NAV PILLS ─────────────────────────────────────────── */
.topic-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.topic-nav a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0.32rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.topic-nav a:hover {
  color: var(--topic-color, var(--accent));
  border-color: var(--topic-color, var(--accent));
  background: var(--topic-bg, var(--accent-bg));
  text-decoration: none;
}

/* ── MAIN CONTENT WRAPPER ────────────────────────────────────── */
.curr-main {
  max-width: var(--curr-max-w);
  margin: 0 auto;
  padding: 0 2rem 5rem;
}

/* ── EXPAND ALL ──────────────────────────────────────────────── */
.curr-expand-all-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 0.875rem;
  cursor: pointer;
  margin: 1.25rem 0 0.75rem;
  transition: color var(--transition), border-color var(--transition);
}
.curr-expand-all-btn:hover { color: var(--text); border-color: var(--border-strong); }
.curr-expand-all-btn::before { content: '⊞ '; }
.curr-expand-all-btn.is-expanded::before { content: '⊟ '; }

/* ── TOP-LEVEL SECTION ACCORDION ────────────────────────────── */
.curr-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 8px solid var(--curr-color, var(--border));
  border-radius: 0 var(--radius) var(--radius) 0;
  padding-left: 20px;
  scroll-margin-top: var(--curr-nav-h);
  margin-top: 0.75rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: box-shadow var(--transition);
}
.curr-section:hover { box-shadow: 0 3px 10px rgba(0,0,0,0.1); }
.curr-section:has(.curr-body.open) {
  box-shadow: 0 4px 18px rgba(0,0,0,0.11);
  border-color: var(--curr-color, var(--border));
}

.curr-trigger {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.75rem 4px 1.75rem 0;
  cursor: pointer;
  text-align: left;
  gap: 1rem;
}
.curr-trigger:focus-visible { outline: 2px solid var(--curr-color, var(--accent)); outline-offset: 4px; }

.curr-trigger-left {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  flex-wrap: wrap;
}
.curr-badge {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--curr-color, var(--muted));
  white-space: nowrap;
  flex-shrink: 0;
}
.curr-trigger h2 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
  transition: color 0.2s;
}
.curr-trigger[aria-expanded="true"] h2 { color: var(--curr-color, var(--accent)); }

.curr-sec-sub {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.curr-chevron {
  width: 22px; height: 22px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--muted);
}
.curr-trigger[aria-expanded="true"] .curr-chevron {
  transform: rotate(180deg);
  color: var(--curr-color, var(--accent));
}

.curr-body { display: none; padding-bottom: 2.5rem; }
.curr-body.open { display: block; }

.curr-section-intro {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.curr-section-intro-wrap {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 1.5rem;
  align-items: start;
  margin-bottom: 1.5rem;
}
.curr-section-intro-wrap .curr-section-intro { margin-bottom: 0; }
.curr-section-intro-photo {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px dashed var(--border);
  background: var(--surface-2);
  aspect-ratio: 4/3;
}
.curr-section-intro-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.curr-section-intro-img[src=""] { display: none; }

/* ── LEARNING OBJECTIVE SUB-SECTIONS ─────────────────────────── */
.obj-list { margin-top: 0.5rem; }

.obj-section {
  scroll-margin-top: calc(var(--curr-nav-h) + 12px);
  border-bottom: 1px solid var(--surface-2);
}
.obj-section:first-child { border-top: 1px solid var(--surface-2); }

.obj-trigger {
  width: 100%;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 4px 1.5rem 0;
  cursor: pointer;
  text-align: left;
  gap: 1rem;
}
.obj-trigger:focus-visible { outline: 2px solid var(--curr-color, var(--accent)); outline-offset: 4px; }

.obj-trigger-left {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  flex: 1;
}
.obj-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--curr-color, var(--muted));
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 3rem;
  margin-top: 0.22rem;  /* align with cap-height of h3 */
  transition: color 0.15s;
}
.obj-trigger h3 {
  flex: 1;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 400;
  color: var(--text);
  line-height: 1.3;
  transition: color 0.2s;
}
.obj-trigger[aria-expanded="true"] h3,
.obj-trigger[aria-expanded="true"] .obj-code { color: var(--curr-color, var(--accent)); }
.obj-trigger:hover h3,
.obj-trigger:hover .obj-code { color: var(--curr-color, var(--accent)); }

.obj-chevron {
  width: 20px; height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--muted);
}
.obj-trigger[aria-expanded="true"] .obj-chevron {
  transform: rotate(180deg);
  color: var(--curr-color, var(--accent));
}

.obj-body { display: none; padding: 0.25rem 0 1.25rem 4rem; }
.obj-body.open { display: block; }

.obj-figure {
  margin: 1rem 0 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.obj-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: cover;
}
.obj-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  padding: 0.4rem 0.75rem;
  letter-spacing: 0.04em;
}
.obj-figure:has(.obj-img[src=""]) { display: none; }

.obj-statement {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.obj-outcome {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.65;
  padding: 0.65rem 0.875rem;
  background: var(--surface-2);
  border-left: 2px solid var(--border-strong);
  border-radius: 0 4px 4px 0;
  margin-bottom: 1.25rem;
}
.obj-outcome-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

/* ── CHINESE LANGUAGE TOGGLE ─────────────────────────────────── */
.lang-toggle-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0 1.25rem;
}
.lang-toggle-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  user-select: none;
  transition: color var(--transition);
}
.lang-toggle-label:hover { color: var(--text); }
.lang-toggle-checkbox {
  accent-color: var(--curr-color, var(--accent));
  width: 14px; height: 14px;
  cursor: pointer;
}

/* ── BILINGUAL BLOCK ─────────────────────────────────────────── */
.bilingual-block {
  display: grid;
  grid-template-columns: 1fr;   /* single-column by default (ZH hidden) */
  gap: 1rem;
  margin: 1rem 0;
}
body.zh-on .bilingual-block {
  grid-template-columns: 1fr 1fr;
}
/* Hide the second lang-col (Chinese) by default */
.bilingual-block .lang-col:last-child { display: none; }
body.zh-on .bilingual-block .lang-col:last-child { display: block; }

.lang-col {
  padding: 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.lang-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.65rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.lang-en { font-size: 0.88rem; line-height: 1.7; color: var(--text); }
.lang-zh {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text);
  font-family: -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei',
               'Segoe UI', Arial, sans-serif;
}
.content-placeholder {
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

/* ── QUIZ COMPONENT ──────────────────────────────────────────── */
.quiz-wrap { margin-top: 0.25rem; }

.quiz-intro {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  line-height: 1.65;
}

.quiz-question {
  margin-bottom: 1.25rem;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.quiz-q-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.quiz-q-text {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.55;
  margin-bottom: 1rem;
}
.quiz-options { display: flex; flex-direction: column; gap: 0.45rem; }

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.6rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--bg);
  font-size: 0.875rem;
  transition: background 0.13s, border-color 0.13s;
  text-align: left;
  width: 100%;
  font-family: var(--font-body);
  line-height: 1.45;
  color: var(--text);
}
.quiz-option:hover:not(:disabled) {
  background: var(--surface-2);
  border-color: var(--border-strong);
}
.quiz-option.correct  { background: var(--green-bg); border-color: #86efac; color: var(--green); }
.quiz-option.incorrect { background: #fee2e2; border-color: #fca5a5; color: #991b1b; }
.quiz-option:disabled { cursor: default; }

.quiz-option-letter {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--muted);
  flex-shrink: 0;
  margin-top: 1px;
}

.quiz-feedback {
  display: none;
  margin-top: 0.75rem;
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  font-size: 0.86rem;
  line-height: 1.55;
}
.quiz-feedback.show { display: block; }
.quiz-feedback.fb-correct   { background: var(--green-bg); color: var(--green);  border: 1px solid #86efac; }
.quiz-feedback.fb-incorrect { background: #fee2e2;         color: #991b1b;        border: 1px solid #fca5a5; }
.quiz-feedback-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.quiz-reset {
  display: none;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.13s;
}
.quiz-reset:hover { color: var(--accent); border-color: var(--accent); }

/* ── PAPER 2 COMPONENT ───────────────────────────────────────── */
.p2-intro {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--surface-2);
  border-left: 3px solid var(--c-paper2);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.p2-question {
  margin-bottom: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.p2-q-header {
  padding: 1rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.p2-q-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.p2-q-num {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.p2-marks {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 600;
  color: #fff;
  background: var(--c-paper2);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  letter-spacing: 0.06em;
}
.p2-q-text {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.6;
}
.p2-stimulus {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  font-style: italic;
}
.p2-stimulus-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-style: normal;
  margin-bottom: 0.4rem;
}

.p2-q-body {
  padding: 1rem 1.25rem;
  background: var(--bg);
}
.p2-reveal-btns { display: flex; gap: 0.45rem; flex-wrap: wrap; }

.p2-reveal-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.38rem 0.875rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all 0.13s;
}
.p2-reveal-btn:hover { color: var(--accent); border-color: var(--accent); }
.p2-reveal-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.p2-panel {
  display: none;
  margin-top: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  line-height: 1.65;
}
.p2-panel.show { display: block; }
.p2-answer    { background: var(--surface);   border: 1px solid var(--border); }
.p2-markscheme { background: var(--surface-2); border: 1px solid var(--border); }
.p2-panel-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

/* ── REFERENCES SECTION ──────────────────────────────────────── */
.curr-refs-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  margin-top: 0.5rem;
  max-width: 680px;
}
.curr-ref-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), background var(--transition);
}
.curr-ref-item:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
  text-decoration: none;
}
.curr-ref-title { font-size: 0.9rem; font-weight: 500; color: var(--accent); }
.curr-ref-desc  { font-size: 0.8rem; color: var(--muted); }

/* ── LINKING QUESTIONS ───────────────────────────────────────── */
.linking-qs {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.linking-qs-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}
.linking-qs ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.linking-qs li {
  font-size: 0.875rem;
  color: var(--text);
  padding: 0.6rem 0.875rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  line-height: 1.55;
}
.linking-qs li a {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
  margin-left: 0.4rem;
}
.linking-qs li a:hover { text-decoration: underline; }

/* ── PREV / NEXT TOPIC NAV ───────────────────────────────────── */
.topic-page-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.topic-page-nav a {
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), background var(--transition);
}
.topic-page-nav a:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
  text-decoration: none;
}
.topic-page-nav .nav-dir {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.topic-page-nav .nav-title { font-size: 0.875rem; font-weight: 500; }
.topic-page-nav .nav-next  { text-align: right; }
.topic-page-nav .nav-prev-only { grid-column: 1; }
.topic-page-nav .nav-next-only { grid-column: 2; }

/* ── MYP UNIT HERO ───────────────────────────────────────────── */
.myp-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 3rem 2rem 2.5rem;
}
.myp-hero-inner { max-width: var(--curr-max-w); margin: 0 auto; }
.myp-meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.myp-grade {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid #b8d0f0;
  padding: 0.28rem 0.75rem;
  border-radius: 2px;
}
.myp-audience-tag {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
}
.myp-title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.5rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}
.myp-intro {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 64ch;
  line-height: 1.7;
  margin-bottom: 0;
}

/* MYP criterion section colours (applied via --curr-color) */
.crit-a { --curr-color: #2c5f6e; }
.crit-b { --curr-color: #8b6520; }
.crit-c { --curr-color: #4a3d7a; }
.crit-d { --curr-color: #2d7a6a; }
.crit-refs { --curr-color: #64748b; }

/* ── CURRICULUM HUB ──────────────────────────────────────────── */
.hub-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem;
}
.hub-hero-inner { max-width: var(--max-w); margin: 0 auto; }
.hub-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid #b8d0f0;
  padding: 0.28rem 0.75rem;
  border-radius: 2px;
  margin-bottom: 1.25rem;
}
.hub-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}
.hub-desc { font-size: 0.95rem; color: var(--muted); max-width: 56ch; line-height: 1.7; }

.hub-programme { border-bottom: 1px solid var(--border); }
.hub-programme-inner { max-width: var(--max-w); margin: 0 auto; padding: 3.5rem 2rem; }

.hub-prog-header { margin-bottom: 2rem; }
.hub-prog-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.4rem;
}
.hub-prog-desc { font-size: 0.88rem; color: var(--muted); max-width: 60ch; }

.hub-group { margin-bottom: 2.5rem; }
.hub-group:last-child { margin-bottom: 0; }
.hub-group-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.875rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topic-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.75rem;
}

.topic-card {
  display: flex;
  flex-direction: column;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.topic-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(26,92,184,0.08);
  text-decoration: none;
}
.topic-card.is-hl { border-left: 3px solid var(--hl); }
.topic-card.is-hl:hover { border-color: var(--hl); box-shadow: 0 2px 12px rgba(124,58,237,0.08); }

.topic-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.topic-card-code {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.topic-card-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  padding: 0.15rem 0.45rem;
  border-radius: 2px;
}
.badge-sl   { background: var(--accent-bg); color: var(--accent); }
.badge-slhl { background: var(--accent-bg); color: var(--accent); }
.badge-hl   { background: var(--hl-bg);     color: var(--hl);     }

.topic-card-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.35;
  margin-bottom: 0.45rem;
}
.topic-card-q {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.55;
  flex: 1;
}
.topic-card-foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.75rem;
  padding-top: 0.625rem;
  border-top: 1px solid var(--border);
}
.card-status {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.18rem 0.5rem;
  border-radius: 2px;
}
.status-soon  { background: var(--surface-2); color: var(--muted); }
.status-wip   { background: var(--amber-bg);  color: var(--amber); }
.status-ready { background: var(--green-bg);  color: var(--green); }

.myp-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}
.myp-card {
  display: flex;
  flex-direction: column;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.myp-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(26,92,184,0.08);
  text-decoration: none;
}
.myp-card-grade {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.myp-card-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.35;
  flex: 1;
}
.myp-card-foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.75rem;
  padding-top: 0.625rem;
  border-top: 1px solid var(--border);
}

/* ── STUDY GUIDE CONTENT ─────────────────────────────────────── */
.content-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  margin: 1.25rem 0;
  line-height: 1.5;
}
.content-table th {
  background: var(--surface-2);
  font-weight: 600;
  text-align: left;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  font-size: 0.78rem;
}
.content-table td {
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  vertical-align: top;
}
.content-table tr:nth-child(even) td { background: var(--surface-2); }
.content-table-wrap { overflow-x: auto; margin: 1.25rem 0; }
.content-table-wrap .content-table { margin: 0; }

.content-note {
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
  padding: 0.6rem 0.875rem;
  border-left: 3px solid var(--border);
  margin: 0.75rem 0 1.25rem;
  line-height: 1.6;
}

.usability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
  margin: 1.25rem 0;
}
.usability-card {
  padding: 0.9rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.usability-card-e {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.3rem;
}
.usability-card-title { font-size: 0.88rem; font-weight: 600; margin-bottom: 0.15rem; }
.usability-card-zh { font-size: 0.78rem; color: var(--muted); margin-bottom: 0.45rem; }
.usability-card-desc { font-size: 0.78rem; color: var(--muted); line-height: 1.55; }

.checklist { list-style: none; padding: 0; margin: 0.875rem 0; }
.checklist li {
  font-size: 0.87rem;
  padding: 0.4rem 0 0.4rem 1.75rem;
  position: relative;
  line-height: 1.5;
  border-bottom: 1px solid var(--border);
}
.checklist li:last-child { border-bottom: none; }
.checklist li::before { content: "□"; position: absolute; left: 0.1rem; color: var(--muted); }
.checklist li strong { font-weight: 600; }

.persona-template {
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
}
.persona-template-label {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 1rem;
}
.persona-field { margin-bottom: 0.875rem; }
.persona-field-name { font-size: 0.8rem; font-weight: 600; margin-bottom: 0.15rem; }
.persona-field-hint { font-size: 0.75rem; color: var(--muted); font-style: italic; }
.persona-field-line { height: 1px; background: var(--border); margin-top: 0.5rem; }

/* ── ACTIVITY BLOCKS ─────────────────────────────────────────── */
.activity-block {
  margin: 1.5rem 0 0.5rem;
  padding: 1.25rem 1.5rem 1.5rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.activity-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.3rem;
}
.activity-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.activity-desc {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  max-width: 72ch;
}

/* Product comparison cards (1.1.1) */
.product-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.875rem;
}
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
}
.product-card-icon { font-size: 1.4rem; margin-bottom: 0.5rem; line-height: 1; }
.product-card-type {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.2rem;
}
.product-card-name {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.6rem;
}
.product-card-context {
  font-size: 0.81rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 0.875rem;
  flex: 1;
}
.product-card-strategy-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
  padding-top: 0.875rem;
  border-top: 1px solid var(--border);
}
.product-card ul { padding-left: 1rem; margin: 0; }
.product-card li { font-size: 0.8rem; color: var(--muted); line-height: 1.6; margin-bottom: 0.25rem; }

/* Five E's applied cards (1.1.4) */
.e-applied-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
  margin: 1.25rem 0;
}
.e-applied-card {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.e-applied-content {
  flex: 1;
  padding: 1.1rem 1.25rem 1.25rem;
  min-width: 0;
}
.e-applied-photo {
  width: 200px;
  flex-shrink: 0;
  background: var(--surface-2);
  border-left: 1px solid var(--border);
  overflow: hidden;
}
.e-applied-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.e-applied-img[src=""] { display: none; }
.e-applied-e {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.2rem;
}
.e-applied-title { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.1rem; }
.e-applied-ib { font-size: 0.74rem; color: var(--muted); font-style: italic; margin-bottom: 0.65rem; }
.e-applied-product {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  background: var(--surface-2);
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 0.5rem;
}
.e-applied-desc { font-size: 0.79rem; color: var(--muted); line-height: 1.6; }

/* ── INTERACTIVE TOOL PRIMITIVES ────────────────────────────── */
.tool-btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.55rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity var(--transition);
  margin-top: 1rem;
}
.tool-btn:hover { opacity: 0.86; }
.tool-btn-sm {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.38rem 0.9rem;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition);
  white-space: nowrap;
}
.tool-btn-sm:hover { border-color: var(--accent); }

/* Field research */
.fr-card {
  display: none;
  margin-top: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.fr-setting { font-family: var(--font-display); font-size: 1rem; color: var(--accent); margin-bottom: 0.75rem; }
.fr-task-label, .fr-collect-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0.875rem 0 0.3rem;
}
.fr-task-text { font-size: 0.88rem; line-height: 1.6; }
.fr-collect-list { padding-left: 1.25rem; margin: 0.25rem 0 0; }
.fr-collect-list li { font-size: 0.84rem; line-height: 1.6; color: var(--muted); margin-bottom: 0.2rem; }
.fr-tip {
  margin-top: 1rem;
  font-size: 0.82rem;
  padding: 0.65rem 0.875rem;
  background: var(--surface-2);
  border-left: 3px solid var(--accent);
  border-radius: 0 3px 3px 0;
  line-height: 1.6;
  color: var(--muted);
}
.fr-tip-label { font-family: var(--font-mono); font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); display: block; margin-bottom: 0.2rem; }

/* Focus group */
.fg-topic-row { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.fg-topic-input {
  flex: 1;
  min-width: 200px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}
.fg-topic-input:focus { outline: none; border-color: var(--accent); }
.fg-output {
  display: none;
  margin-top: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.fg-questions-label, .fg-facilitator-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.fg-facilitator-label { margin-top: 1.25rem; }
.fg-question-list { padding-left: 1.25rem; margin: 0 0 0.5rem; }
.fg-question-item { font-size: 0.9rem; line-height: 1.65; margin-bottom: 0.75rem; }
.fg-topic-highlight { background: #e8f0fd; color: var(--accent); padding: 0 0.2em; border-radius: 2px; }
.fg-facilitator-list { list-style: none; padding-left: 0; margin: 0; }
.fg-facilitator-list li { display: flex; gap: 0.5rem; align-items: baseline; font-size: 0.83rem; color: var(--muted); line-height: 1.6; margin-bottom: 0.4rem; }
.fg-q-num { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); min-width: 2rem; flex-shrink: 0; }

/* Likert simulator */
.likert-subject-row { margin-bottom: 1rem; }
.likert-subject-label { display: block; font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 0.4rem; }
.likert-tool { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: start; margin-top: 1rem; }
.likert-scale-header { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted); margin-bottom: 0.75rem; }
.likert-q { margin-bottom: 0.875rem; padding: 0.875rem 1rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.likert-q-text { width: 100%; font-family: var(--font-body); font-size: 0.85rem; border: none; background: transparent; color: var(--text); margin-bottom: 0.6rem; padding: 0; outline: none; box-sizing: border-box; }
.likert-q-text:focus { border-bottom: 1px solid var(--accent); }
.likert-opts { display: flex; gap: 0.4rem; }
.likert-opt {
  flex: 1;
  padding: 0.35rem 0;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--surface-2);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  transition: border-color var(--transition), background var(--transition);
}
.likert-opt:hover { border-color: var(--accent); }
.likert-opt.selected { background: var(--accent-bg); border-color: var(--accent); }
.likert-opt-n { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 600; }
.likert-opt-l { font-family: var(--font-mono); font-size: 0.56rem; color: var(--muted); }
.likert-opt.selected .likert-opt-n { color: var(--accent); }
.likert-results { display: none; }
.likert-result-q { margin-bottom: 1.5rem; }
.likert-result-q-text { font-size: 0.82rem; font-weight: 500; margin-bottom: 0.6rem; line-height: 1.5; }
.likert-bar-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.3rem; }
.likert-bar-label { font-size: 0.7rem; color: var(--muted); width: 105px; flex-shrink: 0; }
.likert-bar-track { flex: 1; height: 10px; background: var(--surface-2); border-radius: 2px; overflow: hidden; }
.likert-bar-fill { height: 100%; background: var(--accent); border-radius: 2px; width: 0; transition: width 0.55s ease; }
.likert-bar-count { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text); white-space: nowrap; width: 80px; text-align: right; }
.likert-bar-pct { color: var(--muted); }
.likert-interpret { margin-top: 1.5rem; font-size: 0.83rem; padding: 0.875rem 1rem; background: var(--surface-2); border-radius: var(--radius); line-height: 1.65; color: var(--muted); display: none; }

/* Persona builder */
.persona-product-display { display: none; margin-bottom: 1.25rem; padding: 0.875rem 1.1rem; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.persona-product-name { font-size: 0.9rem; font-weight: 500; margin-bottom: 0.2rem; }
.persona-product-context { font-size: 0.8rem; color: var(--muted); line-height: 1.6; }
.persona-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem; margin: 1rem 0; }
.pb-field { display: flex; flex-direction: column; gap: 0.2rem; }
.pb-field-full { grid-column: 1 / -1; }
.pb-label { font-family: var(--font-mono); font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.pb-input { font-family: var(--font-body); font-size: 0.84rem; padding: 0.4rem 0.65rem; border: 1px solid var(--border); border-radius: 3px; background: var(--surface); color: var(--text); }
.pb-input:focus { outline: none; border-color: var(--accent); }
.persona-output { display: none; margin-top: 1.5rem; }
.persona-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.persona-card-header { padding: 1.25rem 1.5rem; background: var(--accent); color: white; }
.persona-card-product { font-family: var(--font-mono); font-size: 0.6rem; opacity: 0.8; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.3rem; }
.persona-card-name { font-family: var(--font-display); font-size: 1.4rem; margin-bottom: 0.2rem; }
.persona-card-tagline { font-size: 0.84rem; opacity: 0.85; }
.persona-card-body { padding: 1.25rem 1.5rem; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; }
.persona-card-section-title { font-family: var(--font-mono); font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.6rem; padding-bottom: 0.35rem; border-bottom: 1px solid var(--border); }
.persona-card-row { display: flex; flex-direction: column; gap: 0.1rem; margin-bottom: 0.5rem; }
.persona-card-row > span:first-child { font-size: 0.7rem; color: var(--muted); }
.persona-card-row > span:last-child { font-size: 0.84rem; }

/* Task analysis */
.ta-column-hint { font-size: 0.82rem; color: var(--muted); margin-bottom: 0.875rem; line-height: 1.6; }
.ta-goal-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1.25rem; flex-wrap: wrap; }
.ta-goal-label-text { font-family: var(--font-mono); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); white-space: nowrap; }
.ta-goal-input { flex: 1; min-width: 200px; font-family: var(--font-body); font-size: 0.88rem; padding: 0.45rem 0.75rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text); }
.ta-goal-input:focus { outline: none; border-color: var(--accent); }
.ta-step { display: flex; align-items: flex-start; gap: 0.65rem; margin-bottom: 0.6rem; }
.ta-step-num { font-family: var(--font-mono); font-size: 0.66rem; color: var(--muted); padding-top: 0.5rem; white-space: nowrap; width: 46px; flex-shrink: 0; }
.ta-step-fields { flex: 1; display: flex; flex-direction: column; gap: 0.3rem; }
.ta-hta-input, .ta-cta-input { width: 100%; font-family: var(--font-body); font-size: 0.83rem; padding: 0.38rem 0.65rem; border: 1px solid var(--border); border-radius: 3px; background: var(--surface); color: var(--text); box-sizing: border-box; }
.ta-hta-input { border-left: 3px solid var(--accent); }
.ta-cta-input { border-left: 3px solid #94a3b8; font-style: italic; background: var(--surface-2); color: var(--muted); }
.ta-hta-input:focus, .ta-cta-input:focus { outline: none; }
.ta-remove-btn { font-size: 1rem; color: var(--muted); background: none; border: none; cursor: pointer; padding: 0.3rem 0.5rem; border-radius: 3px; flex-shrink: 0; margin-top: 0.2rem; }
.ta-remove-btn:hover { color: var(--text); background: var(--surface-2); }
.ta-controls { display: flex; gap: 0.75rem; margin-top: 0.875rem; align-items: center; }
.ta-map {
  display: none;
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  overflow-x: auto;
  overflow-y: auto;
  min-height: 220px;
  padding: 1rem;
  box-sizing: border-box;
}
.ta-map-inner { position: relative; display: inline-block; min-width: 100%; }
.ta-goal-node { background: var(--accent); color: white; border-radius: var(--radius); padding: 0.5rem 1.1rem; text-align: center; }
.ta-goal-label { font-family: var(--font-mono); font-size: 0.58rem; text-transform: uppercase; letter-spacing: 0.1em; opacity: 0.8; margin-bottom: 0.15rem; }
.ta-goal-text { font-size: 0.85rem; font-weight: 500; }
.ta-node {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: grab;
  user-select: none;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.ta-node:active { cursor: grabbing; }
.ta-node-hta { padding: 0.5rem 0.75rem; font-size: 0.8rem; line-height: 1.45; border-bottom: 1px solid var(--border); flex: 1; background: var(--accent-bg); }
.ta-node-num { font-family: var(--font-mono); font-size: 0.58rem; color: var(--accent); display: block; margin-bottom: 0.15rem; }
.ta-node-cta { padding: 0.4rem 0.75rem; font-size: 0.75rem; color: var(--muted); font-style: italic; line-height: 1.45; }
.ta-drag-hint { font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted); margin-top: 0.5rem; letter-spacing: 0.04em; display: none; }

@media (max-width: 800px) {
  .likert-tool { grid-template-columns: 1fr; }
  .persona-card-body { grid-template-columns: 1fr 1fr; }
  .curr-section-intro-wrap { grid-template-columns: 1fr; }
  .curr-section-intro-photo { display: none; }
  .e-applied-photo { width: 140px; }
}
@media (max-width: 560px) {
  .e-applied-card { flex-direction: column; }
  .e-applied-photo {
    width: 100%;
    height: 160px;
    border-left: none;
    border-top: 1px solid var(--border);
  }
}
@media (max-width: 560px) {
  .persona-form-grid { grid-template-columns: 1fr; }
  .persona-card-body { grid-template-columns: 1fr; }
}

/* ── QUIZ SECTION ────────────────────────────────────────────── */
.quiz-q {
  margin-bottom: 1.1rem;
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.quiz-q-num {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}
.quiz-q-text { font-size: 0.9rem; font-weight: 500; margin-bottom: 0.75rem; line-height: 1.55; }
.quiz-options { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.875rem; }
.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  font-size: 0.84rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--surface);
  line-height: 1.5;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.quiz-option:hover:not(:disabled) { border-color: var(--border-strong); background: var(--surface-2); }
.quiz-option.selected  { border-color: var(--accent); background: var(--accent-bg); }
.quiz-option.correct   { border-color: var(--green); background: var(--green-bg); color: var(--green); }
.quiz-option.incorrect { border-color: #fca5a5; background: #fee2e2; color: #991b1b; }
.quiz-option:disabled  { cursor: default; }
.quiz-answer {
  display: none;
  margin-top: 0.5rem;
  font-size: 0.83rem;
  padding: 0.65rem 0.875rem;
  background: var(--surface-2);
  border-left: 3px solid var(--border-strong);
  border-radius: 0 3px 3px 0;
  line-height: 1.6;
  color: var(--muted);
}
.quiz-q.answered .quiz-answer { display: block; }
.quiz-footer {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.quiz-submit-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  padding: 0.55rem 1.4rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity var(--transition);
}
.quiz-submit-btn:hover { opacity: 0.85; }
.quiz-score {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius);
  display: none;
}
.quiz-score.score-good { background: var(--green-bg); color: var(--green); }
.quiz-score.score-low  { background: #fff3cd; color: #7a5f00; }

/* ── PAPER 2 SECTION ─────────────────────────────────────────── */
.p2-question {
  margin-bottom: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.p2-q-num {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.p2-q-text { font-size: 0.9rem; line-height: 1.65; margin-bottom: 0.875rem; }
details.p2-reveal summary {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  color: var(--accent);
  user-select: none;
  list-style: none;
}
details.p2-reveal summary::-webkit-details-marker { display: none; }
details.p2-reveal summary:hover { text-decoration: underline; }
details.p2-reveal[open] summary::before { content: "▲ "; }
details.p2-reveal summary::before { content: "▼ "; }
.p2-answer {
  margin-top: 0.875rem;
  font-size: 0.87rem;
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 0.875rem;
}
.p2-answer p { margin-bottom: 0.75rem; }
.p2-answer p:last-child { margin-bottom: 0; }
.p2-answer strong { font-weight: 600; }
.p2-answer ol, .p2-answer ul { padding-left: 1.5rem; margin: 0.5rem 0 0.75rem; }
.p2-answer li { margin-bottom: 0.3rem; }

/* ── REFERENCES LIST ─────────────────────────────────────────── */
.ref-list { display: flex; flex-direction: column; gap: 1rem; }
.ref-item {
  padding: 1.1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.ref-item-tag {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.ref-item-title { font-size: 0.9rem; font-weight: 500; margin-bottom: 0.25rem; }
.ref-item-url {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  word-break: break-all;
  margin-bottom: 0.5rem;
  display: block;
  text-decoration: none;
}
.ref-item-url:hover { text-decoration: underline; }
.ref-item-desc { font-size: 0.83rem; color: var(--muted); line-height: 1.6; }

/* ── PROGRAMME CARDS (hub two-up) ───────────────────────────── */
.prog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem 2rem 4rem;
}
.prog-card {
  display: flex;
  flex-direction: column;
  padding: 2rem 2rem 1.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.prog-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(26,92,184,0.10);
  text-decoration: none;
}
.prog-card-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.prog-card-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 400;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}
.prog-card-desc {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 1.25rem;
}
.prog-card-meta {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.prog-card-meta-item {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}
.prog-card-meta-item strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font-display);
  font-weight: 400;
  margin-bottom: 0.1rem;
}
.prog-card-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* ── PROGRAMME LANDING HERO ──────────────────────────────────── */
.prog-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 2rem 2.5rem;
}
.prog-hero-inner { max-width: var(--max-w); margin: 0 auto; }
.prog-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}
.prog-hero-desc {
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 60ch;
  line-height: 1.7;
}
.prog-hero-back {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  display: inline-block;
  margin-bottom: 1.25rem;
}
.prog-hero-back:hover { color: var(--accent); }

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 640px) {
  .topic-hero,
  .myp-hero  { padding: 2rem 1.25rem; }
  .curr-main { padding: 0 1.25rem 4rem; }
  .hub-hero  { padding: 2.5rem 1.25rem; }
  .hub-programme-inner { padding: 2.5rem 1.25rem; }
  .topic-page-nav { grid-template-columns: 1fr; }
  .topic-page-nav .nav-prev-only,
  .topic-page-nav .nav-next-only { grid-column: 1; }
  .obj-body { padding-left: 2rem; }
}

/* ── IN-PAGE TOC LAYOUT ──────────────────────────────────────── */
.curr-page-layout {
  display: grid;
  grid-template-columns: 210px 1fr 210px; /* symmetric: mirrors TOC on right so content stays centred */
  align-items: start;
}

/* Prevent grid item from overflowing its column (classic CSS Grid min-width fix) */
.curr-page-layout > .curr-main {
  min-width: 0;
}

.curr-toc {
  position: sticky;
  top: calc(var(--curr-nav-h) + 1rem);
  max-height: calc(100vh - var(--curr-nav-h) - 2rem);
  overflow-y: auto;
  padding: 1.75rem 0.75rem 1.75rem 1.5rem;
  border-right: 1px solid var(--border);
}

.curr-toc-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.875rem;
}

.curr-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.curr-toc-list > li > a {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.3rem 0.5rem;
  border-radius: 3px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  transition: color var(--transition), background var(--transition);
}
.curr-toc-list > li > a:hover { color: var(--text); background: var(--surface-2); }
.curr-toc-list > li.active > a {
  color: var(--accent);
  background: var(--accent-bg);
  font-weight: 600;
}

.curr-toc-sub {
  list-style: none;
  padding: 0.15rem 0 0.15rem 0.625rem;
  margin: 0;
  display: block; /* always visible */
  border-left: 1px solid var(--border);
  margin-left: 0.5rem;
}
.curr-toc-sub li a {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.22rem 0.4rem;
  border-radius: 2px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  transition: color var(--transition), background var(--transition);
}
.curr-toc-sub li a:hover { color: var(--text); background: var(--surface-2); }
.curr-toc-sub li.active a {
  color: var(--accent);
  background: var(--accent-bg);
}

/* 3rd-level TOC: activities inside each obj-section — always visible */
.curr-toc-acts {
  list-style: none;
  padding: 0.12rem 0 0.12rem 0.625rem;
  margin: 0 0 0 0.5rem;
  display: block;
  border-left: 1px dotted var(--border);
}
.curr-toc-acts li a {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--muted);
  text-decoration: none;
  padding: 0.18rem 0.4rem;
  border-radius: 2px;
  line-height: 1.45;
  letter-spacing: 0.01em;
  transition: color var(--transition), background var(--transition);
}
.curr-toc-acts li a:hover { color: var(--text); background: var(--surface-2); }
.curr-toc-acts li.active a {
  color: var(--accent);
  background: var(--accent-bg);
}

/* Hide TOC on small screens; collapse to 1 column */
@media (max-width: 960px) {
  .curr-page-layout {
    grid-template-columns: 1fr;
  }
  .curr-toc {
    display: none;
  }
}

/* Ensure anchor-targeted activity blocks aren't hidden under the sticky header */
.activity-block[id] {
  scroll-margin-top: calc(var(--curr-nav-h) + 1rem);
}

/* ── OVERFLOW CONTAINMENT ────────────────────────────────────── */
/* Contain overflow at the section level so nothing bleeds past the right edge */
.curr-section {
  overflow-x: hidden;
}
/* Scroll within accordion bodies when content is wider than container */
.curr-body,
.obj-body {
  overflow-x: auto;
}