/* BNurs Curriculum Mapping – University of Manchester */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --purple: #5a1a6e;
  --purple-dk: #3d1149;
  --purple-lt: #8c4da0;
  --purple-bg: rgba(90,26,110,0.06);
  --gold: #e8c04a;
  --red: #b00020;
  --red-bg: #fff0f3;
  --green: #1a6e3d;
  --green-bg: #f0fff5;
  --bg: #f4f4f6;
  --white: #ffffff;
  --border: #ddd;
  --text: #1a1a1a;
  --muted: #666;
  --font: system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
}

body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.55; }

/* ── Header ───────────────────────────────────────────── */
header { background: var(--purple); color: #fff; padding: 1rem 2rem; }
.header-inner { max-width: 1280px; margin: 0 auto; display: flex; align-items: center; gap: 1.25rem; }
.uom-logo { height: 60px; width: auto; flex-shrink: 0; }
header h1 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; }
.subtitle { font-size: 0.8rem; opacity: 0.7; margin-top: 0.2rem; }

/* ── Filter bar ───────────────────────────────────────── */
.filter-bar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 0.7rem 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.search-by-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  white-space: nowrap;
}
.filter-divider {
  display: inline-block;
  width: 1px;
  height: 34px;
  background: var(--border);
  flex-shrink: 0;
  align-self: center;
}
.filter-group { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.filter-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--purple);
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.filter-group--search { margin-left: auto; }
.btn-group { display: flex; gap: 0.2rem; }
.filter-btn {
  padding: 0.28rem 0.7rem;
  border: 1px solid var(--border);
  background: var(--white);
  border-radius: 20px;
  font-size: 0.78rem;
  cursor: pointer;
  color: var(--text);
  font-family: var(--font);
  transition: all 0.12s;
}
.filter-btn:hover { border-color: var(--purple-lt); color: var(--purple); }
.filter-btn.active { background: var(--purple); border-color: var(--purple); color: #fff; }
/* ── Year of Study buttons: purple bg, white text ─────── */
.filter-btn[data-filter="year"] {
  background: var(--purple);
  color: #fff;
  border-color: var(--purple);
  padding: 0.45rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 700;
}
.filter-btn[data-filter="year"]:hover {
  background: var(--purple-lt);
  border-color: var(--purple-lt);
  color: #fff;
}
.filter-btn[data-filter="year"].active {
  background: var(--purple-dk);
  border-color: var(--purple-dk);
  color: #fff;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.25);
}
#search {
  padding: 0.32rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.83rem;
  width: 300px;
  font-family: var(--font);
}
#search:focus { outline: none; border-color: var(--purple-lt); box-shadow: 0 0 0 2px rgba(90,26,110,0.12); }

/* ── Nav ──────────────────────────────────────────────── */
.main-nav {
  background: var(--purple-dk);
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow-x: auto;
}
.nav-btn {
  background: #fff;
  border: none;
  color: var(--purple);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.55rem 1.35rem;
  cursor: pointer;
  border-radius: 50px;
  white-space: nowrap;
  letter-spacing: 0.01em;
  box-shadow: 0 5px 0 rgba(0,0,0,0.28), 0 6px 4px rgba(0,0,0,0.15);
  transform: translateY(0);
  transition: transform 0.1s, box-shadow 0.1s, background 0.1s;
}
.nav-btn:hover {
  background: #f5eef8;
  transform: translateY(2px);
  box-shadow: 0 3px 0 rgba(0,0,0,0.28), 0 4px 3px rgba(0,0,0,0.12);
}
.nav-btn.active {
  background: var(--gold);
  color: var(--purple-dk);
  transform: translateY(4px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.2);
}
.nav-btn.export-btn {
  margin-left: auto;
  background: var(--gold);
  color: var(--purple-dk);
  box-shadow: 0 5px 0 rgba(0,0,0,0.28), 0 6px 4px rgba(0,0,0,0.15);
}
.nav-btn.export-btn:hover {
  background: #f0cc5a;
  transform: translateY(2px);
  box-shadow: 0 3px 0 rgba(0,0,0,0.28), 0 4px 3px rgba(0,0,0,0.12);
}

/* ── Main content ─────────────────────────────────────── */
main { max-width: 1280px; margin: 0 auto; padding: 1.5rem 2rem 3rem; }
.loading { text-align: center; padding: 3rem; color: var(--muted); }

/* ── Stats bar ────────────────────────────────────────── */
.stats-bar { display: flex; gap: 0.9rem; margin-bottom: 1.5rem; flex-wrap: wrap; }
.stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
  min-width: 110px;
  text-align: center;
  flex: 1;
}
.stat-num { font-size: 1.8rem; font-weight: 700; color: var(--purple); line-height: 1; }
.stat-label { font-size: 0.72rem; color: var(--muted); margin-top: 0.2rem; text-transform: uppercase; letter-spacing: 0.04em; }
.stat.gap { border-left: 4px solid var(--red); }
.stat.gap .stat-num { color: var(--red); }
.stat.covered .stat-num { color: var(--green); }

/* ── Section headers ──────────────────────────────────── */
.section-hd {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--purple);
  margin: 1.75rem 0 0.6rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--purple);
}
.section-hd:first-child { margin-top: 0; }
.subsection-hd {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  margin: 0.75rem 0 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Standard / PO items ──────────────────────────────── */
.std-item {
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  margin-bottom: 0.4rem;
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.std-item.covered { border-left: 4px solid var(--green); }
.std-item.gap { border-left: 4px solid var(--red); background: var(--red-bg); }

.std-row { display: flex; align-items: baseline; gap: 0.5rem; flex-wrap: wrap; }
.std-id {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--purple);
  background: var(--purple-bg);
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
  font-family: monospace;
  white-space: nowrap;
  flex-shrink: 0;
}
.std-text { font-size: 0.875rem; line-height: 1.45; flex: 1; }
.badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
  white-space: nowrap;
}
.badge-gap { color: var(--red); background: var(--red-bg); border: 1px solid var(--red); }
.badge-ok { color: var(--green); background: var(--green-bg); border: 1px solid var(--green); }

/* ── Unit chips ───────────────────────────────────────── */
.chip-row { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.chip {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  white-space: nowrap;
  cursor: default;
}
.chip.chip-link { cursor: pointer; }
.chip.chip-link:hover { opacity: 0.75; text-decoration: underline; }
.chip.y1 { background: #e3f0fb; color: #154e78; border: 1px solid #9dcaf0; }
.chip.y2 { background: #e3f7ec; color: #1a6e3d; border: 1px solid #8dd4aa; }
.chip.y3 { background: #fdecd8; color: #783d12; border: 1px solid #f4b97b; }
.chip.y4 { background: #f3e8fb; color: #5a1a6e; border: 1px solid #c49de0; }
.chip.discovery { font-style: italic; opacity: 0.82; }

/* ── Unit cards ───────────────────────────────────────── */
.unit-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.9rem;
  overflow: hidden;
}
.unit-card-hd {
  padding: 0.9rem 1.1rem 0.8rem;
  background: #fafafa;
  border-bottom: 1px solid var(--border);
}
.unit-code { font-family: monospace; font-weight: 700; font-size: 0.82rem; color: var(--purple); }
.unit-title { font-size: 1rem; font-weight: 600; margin-top: 0.1rem; }
.unit-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.5rem 1rem;
  margin-top: 0.65rem;
  padding: 0.65rem 0.85rem;
  background: var(--bg);
  border-radius: 5px;
  border: 1px solid var(--border);
}
.unit-info-item { display: flex; flex-direction: column; gap: 0.1rem; }
.unit-info-label {
  font-size: 0.63rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.unit-info-value { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.unit-info-discovery { color: var(--purple); }

.unit-card-body { padding: 0.9rem 1.1rem; }
.placement-note {
  font-size: 0.8rem;
  color: #0f5132;
  background: #d1e7dd;
  border-radius: 4px;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.6rem;
}
.outcome-item { padding: 0.45rem 0; border-bottom: 1px solid #f0f0f2; }
.outcome-item:last-of-type { border-bottom: none; }
.outcome-cat {
  font-size: 0.67rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.15rem;
}
.outcome-text { font-size: 0.875rem; margin-bottom: 0.3rem; }
.nmc-ref-row { display: flex; flex-wrap: wrap; gap: 0.22rem; }
.nmc-ref {
  font-size: 0.68rem;
  font-family: monospace;
  font-weight: 700;
  padding: 0.1rem 0.32rem;
  border-radius: 3px;
  background: var(--purple-bg);
  color: var(--purple);
  border: 1px solid rgba(90,26,110,0.18);
}
.po-ref {
  font-size: 0.68rem;
  font-family: monospace;
  font-weight: 700;
  padding: 0.1rem 0.32rem;
  border-radius: 3px;
  background: #f0fff5;
  color: var(--green);
  border: 1px solid rgba(26,110,61,0.2);
}
.ref-label { font-size: 0.65rem; color: var(--muted); margin-right: 0.2rem; text-transform: uppercase; letter-spacing: 0.04em; }

.outcome-flagged { border-left: 3px solid #c0392b; padding-left: 0.5rem; background: #fff8f8; }
.outcome-flag-row { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.2rem 0 0.3rem; }
.outcome-flag {
  font-size: 0.67rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  letter-spacing: 0.02em;
}
.flag-nmc { background: #fdecea; color: #c0392b; border: 1px solid rgba(192,57,43,0.3); }
.flag-po  { background: #fff3cd; color: #856404; border: 1px solid rgba(133,100,4,0.3); }

.assessment-block {
  margin-top: 0.75rem;
  padding: 0.45rem 0.75rem;
  background: var(--purple-bg);
  border: 1px solid rgba(90,26,110,0.1);
  border-radius: 4px;
  font-size: 0.82rem;
}
.assessment-block strong { color: var(--purple); }

/* ── Unit detail nav ──────────────────────────────────── */
.unit-detail-nav { margin-bottom: 1rem; }
.back-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.35rem 0.9rem;
  font-size: 0.82rem;
  font-family: var(--font);
  color: var(--purple);
  cursor: pointer;
  transition: all 0.12s;
}
.back-btn:hover { background: var(--purple-bg); border-color: var(--purple-lt); }

/* ── Empty state ──────────────────────────────────────── */
.empty { text-align: center; padding: 3rem 1rem; color: var(--muted); }
.empty svg { width: 48px; height: 48px; opacity: 0.3; margin-bottom: 0.75rem; }

/* ── Clickable ref tags ───────────────────────────────── */
.ref-link { cursor: pointer; }
.ref-link:hover { opacity: 0.72; outline: 1px solid currentColor; border-radius: 3px; }

/* ── Reference popup modal ────────────────────────────── */
.ref-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.ref-modal-overlay.active { display: flex; }
.ref-modal-box {
  background: var(--white);
  border-radius: 10px;
  padding: 1.6rem 1.8rem 1.8rem;
  max-width: 520px;
  width: 100%;
  position: relative;
  box-shadow: 0 8px 32px rgba(0,0,0,0.22);
}
.ref-modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.9rem;
  background: none;
  border: none;
  font-size: 1.3rem;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
  padding: 0.15rem 0.3rem;
}
.ref-modal-close:hover { color: var(--text); }
.popup-label {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0.18rem 0.5rem;
  border-radius: 3px;
  margin-bottom: 0.65rem;
}
.popup-label-nmc { background: var(--purple-bg); color: var(--purple); border: 1px solid rgba(90,26,110,0.18); }
.popup-label-po  { background: var(--green-bg);  color: var(--green);  border: 1px solid rgba(26,110,61,0.2); }
.popup-id {
  font-family: monospace;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--purple);
  line-height: 1;
  margin-bottom: 0.3rem;
}
.popup-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.8rem;
}
.popup-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

/* ── Nav extras ───────────────────────────────────────── */
.nav-spacer { flex: 1; }
.nav-btn-logo { height: 18px; width: auto; vertical-align: middle; margin-right: 0.35rem; }
.nav-btn-gaps {
  color: var(--red);
  border: 3px solid var(--red);
  box-shadow: 0 5px 0 rgba(176,0,32,0.4), 0 6px 4px rgba(0,0,0,0.12);
}
.nav-btn-gaps:hover {
  background: var(--red-bg);
  transform: translateY(2px);
  box-shadow: 0 3px 0 rgba(176,0,32,0.4), 0 4px 3px rgba(0,0,0,0.1);
}
.nav-btn-gaps.active {
  background: var(--red);
  color: #fff;
  transform: translateY(4px);
  box-shadow: 0 1px 0 rgba(176,0,32,0.3);
}

/* ── Assessment map ───────────────────────────────────── */
.stat.assessed { border-left: 4px solid var(--gold); }
.stat.assessed .stat-num { color: #7a5200; }

.assess-note {
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--white);
  border-left: 3px solid var(--gold);
  padding: 0.55rem 0.9rem;
  margin-bottom: 1.25rem;
  border-radius: 0 4px 4px 0;
}

.assess-method-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.75rem;
  margin-bottom: 0.5rem;
}
.assess-method-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
}
.assess-method-text { font-size: 0.875rem; font-weight: 600; }
.assess-weight-badge {
  background: var(--purple);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.12rem 0.45rem;
  border-radius: 20px;
}
.lo-count-chip {
  background: #fffbf0;
  color: #7a5200;
  border: 1px solid var(--gold);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.12rem 0.45rem;
  border-radius: 20px;
}

.assessed-outcome {
  background: var(--green-bg);
  border-left: 3px solid var(--green);
  padding-left: 0.55rem;
}
.taught-outcome {
  border-left: 3px solid var(--border);
  padding-left: 0.55rem;
  opacity: 0.78;
}

.outcome-status-tag {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.08rem 0.4rem;
  border-radius: 20px;
  vertical-align: middle;
  margin-left: 0.35rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.assessed-tag { background: #d4edda; color: #155724; }
.taught-tag { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }

.assessed-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  align-items: center;
  padding: 0.28rem 0.6rem;
  background: #fffbf0;
  border-radius: 4px;
  border: 1px dashed var(--gold);
}
.assessed-row-label {
  font-size: 0.63rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #7a5200;
  white-space: nowrap;
  margin-right: 0.15rem;
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 800px) {
  header, .filter-bar, main { padding-left: 1rem; padding-right: 1rem; }
  .main-nav { padding: 0.5rem 1rem; }
  #search { width: 200px; }
  .filter-group--search { margin-left: 0; }
  .stats-bar { gap: 0.5rem; }
  .stat { min-width: 90px; padding: 0.6rem 0.75rem; }
}