/* =================================================
   The Market Brief Daily — Education CSS
   Premium CFA-Style Curriculum Interface
   ================================================= */

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

/* ── Root Tokens ─────────────────────────── */
:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --ink: #0b1220;
  --muted: #4b5565;
  --muted2: #8493a8;
  --line: #d9e1ee;
  --accent: #0066ff;
  --accent-soft: #eef4ff;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(16,24,40,0.06);
  --shadow: 0 8px 24px rgba(16,24,40,0.10);
  --shadow-lg: 0 16px 48px rgba(16,24,40,0.14);
  --ease: cubic-bezier(0.2,0.9,0.2,1);
  --transition: all 0.2s var(--ease);
  /* defaults for topic color */
  --topic-color: #0066ff;
  --topic-bg: #eef4ff;
  --topic-border: #bfdbfe;
}

/* Topic Colour Themes */
.theme-markets   { --topic-color:#0066ff; --topic-bg:#eff6ff; --topic-border:#bfdbfe; }
.theme-investing { --topic-color:#7c3aed; --topic-bg:#f5f3ff; --topic-border:#ddd6fe; }
.theme-personal  { --topic-color:#059669; --topic-bg:#ecfdf5; --topic-border:#a7f3d0; }
.theme-assets    { --topic-color:#d97706; --topic-bg:#fffbeb; --topic-border:#fde68a; }
.theme-uktax     { --topic-color:#dc2626; --topic-bg:#fef2f2; --topic-border:#fecaca; }
.theme-pensions  { --topic-color:#0891b2; --topic-bg:#ecfeff; --topic-border:#a5f3fc; }

/* ── Reset ──────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }

/* ── Topbar ─────────────────────────────── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 64px;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 22px rgba(2,8,23,.10);
  display: flex; align-items: center;
  padding: 0 48px;
}
.topbar-inner {
  width: 100%; max-width: 1240px; margin: 0 auto;
  display: flex; gap: 32px;
  justify-content: space-between; align-items: center;
}
.brand {
  font-size: 15px; font-weight: 900; letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none;
  white-space: nowrap; transition: opacity .2s; cursor: pointer;
}
.brand:hover { opacity: .75; }
.topbar-nav {
  display: flex; gap: 22px;
  align-items: center; margin-left: auto;
  flex-wrap: wrap; justify-content: flex-end;
}
.nav-link {
  font-size: 13px; font-weight: 800;
  color: var(--muted); text-decoration: none;
  transition: color .2s; cursor: pointer;
  border: none; background: none; padding: 0; border-radius: 0;
}
.nav-link:hover,
.nav-link.active { color: var(--ink); }
.nav-link.active  { font-weight: 900; }

/* dropdown reuse for education topbar */
.topbar-nav .nav-dropdown { position: relative; }
.topbar-nav .nav-dropdown > .nav-drop-toggle {
  display: flex; align-items: center; gap: 4px;
  font-size: 13px; font-weight: 800;
  color: var(--muted); text-decoration: none;
  transition: color .2s; cursor: pointer;
  background: none; border: none; padding: 0;
  line-height: inherit; font-family: inherit;
}
.topbar-nav .nav-dropdown > .nav-drop-toggle:hover,
.topbar-nav .nav-dropdown > .nav-drop-toggle.active { color: var(--ink); }
.topbar-nav .nav-dropdown > .nav-drop-toggle.active { font-weight: 900; }
.topbar-nav .drop-caret {
  display: inline-block; width: 10px; height: 10px;
  position: relative; flex-shrink: 0; transition: transform .2s;
}
.topbar-nav .drop-caret::before {
  content: ''; position: absolute; top: 2px; left: 1px;
  border: 4px solid transparent; border-top-color: currentColor;
}
.topbar-nav .nav-dropdown.open > .nav-drop-toggle .drop-caret { transform: rotate(-180deg); }
.topbar-nav .nav-drop-menu {
  display: none; position: absolute;
  top: calc(100% + 10px); left: 50%;
  transform: translateX(-50%);
  min-width: 190px;
  background: rgba(255,255,255,.98);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(2,8,23,.12), 0 2px 8px rgba(2,8,23,.06);
  padding: 6px; z-index: 1100;
  opacity: 0; transform: translateX(-50%) translateY(-6px);
  transition: opacity .15s ease, transform .15s ease;
  pointer-events: none;
}
.topbar-nav .nav-dropdown.open .nav-drop-menu {
  display: block; opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.topbar-nav .nav-drop-menu a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 8px;
  font-size: 13px; font-weight: 700;
  color: var(--muted); text-decoration: none;
  transition: background .15s, color .15s; white-space: nowrap;
}
.topbar-nav .nav-drop-menu a:hover { background: rgba(0,102,255,.06); color: var(--ink); }
.topbar-nav .nav-drop-menu a.active { color: var(--ink); font-weight: 900; }
.topbar-nav .nav-drop-menu .drop-icon {
  width: 28px; height: 28px; border-radius: 7px;
  background: rgba(0,102,255,.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; flex-shrink: 0;
}
@media (max-width: 768px) {
  .topbar { padding: 0 20px; }
  .topbar-inner {
    gap: 16px;
  }
  .brand {
    flex: 0 1 auto;
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .topbar-nav {
    flex: 1 1 0;
    display: flex;
    flex-wrap: nowrap;
    gap: 14px;
    min-width: 0;
    overflow-x: auto;
    justify-content: flex-start;
    scrollbar-width: thin;
    scrollbar-color: rgba(100, 116, 139, 0.45) transparent;
  }
  .topbar-nav::-webkit-scrollbar { height: 4px; }
  .topbar-nav::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.45);
    border-radius: 999px;
  }
  .topbar-nav .nav-dropdown > .nav-drop-toggle { display: none; }
  .topbar-nav .nav-drop-menu {
    position: static;
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .topbar-nav .nav-drop-menu a {
    padding: 0;
    border-radius: 0;
    font-size: 13px;
    font-weight: 800;
    color: var(--muted);
    background: transparent;
  }
  .topbar-nav .nav-drop-menu a:hover,
  .topbar-nav .nav-drop-menu a.active {
    color: var(--ink);
    font-weight: 900;
  }
  .topbar-nav .nav-drop-menu .drop-icon,
  .topbar-nav .nav-drop-divider { display: none; }
}

/* ── Container ──────────────────────────── */
.container { max-width: 1240px; margin: 0 auto; padding: calc(64px + 28px) 24px 64px; }

/* ── Hero ───────────────────────────────── */
.hero {
  background: linear-gradient(140deg, #ffffff 0%, #eef4ff 60%, #e0ecff 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 40px 32px;
  box-shadow: var(--shadow);
  margin-bottom: 26px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -80px; right: -80px;
  width: 340px; height: 340px;
  background: radial-gradient(circle, rgba(0,102,255,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.kicker {
  font-size: 0.71rem; font-weight: 900;
  letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 10px;
  display: block;
}
.hero h1 {
  font-size: clamp(1.9rem, 3.5vw, 2.9rem);
  font-weight: 900; letter-spacing: -0.03em;
  margin: 0 0 14px; line-height: 1.1;
}
.hero p { margin: 0; color: var(--muted); max-width: 720px; font-size: 1.02rem; }
.hero-stats { display: flex; gap: 28px; margin-top: 26px; flex-wrap: wrap; }
.stat-item { display: flex; flex-direction: column; gap: 2px; }
.stat-num { font-size: 1.55rem; font-weight: 900; color: var(--ink); letter-spacing: -0.03em; }
.stat-label { font-size: 0.71rem; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.search-wrap { margin-top: 22px; }
.search {
  width: 100%; max-width: 480px;
  border: 1.5px solid var(--line); border-radius: 12px;
  padding: 11px 16px; font: inherit; font-size: 0.95rem;
  background: #fff; transition: var(--transition);
}
.search:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,102,255,0.1); }

/* ── Topic Grid (Hub) ───────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.topic-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none; color: inherit;
}
.topic-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--topic-color);
}
.topic-card-accent {
  height: 5px;
  background: linear-gradient(90deg, var(--topic-color), color-mix(in srgb, var(--topic-color) 60%, #fff));
}
.topic-card-header {
  padding: 20px 22px 0;
  display: flex; align-items: flex-start; gap: 14px;
}
.topic-icon {
  width: 50px; height: 50px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; flex-shrink: 0;
  background: var(--topic-bg);
  border: 1px solid var(--topic-border);
}
.topic-card-body { padding: 14px 22px 0; flex: 1; }
.topic-card h3 { margin: 0 0 8px; font-size: 1.1rem; font-weight: 800; }
.topic-card p { margin: 0; color: var(--muted); font-size: 0.89rem; line-height: 1.6; }
.topic-modules-preview {
  padding: 12px 22px;
  border-top: 1px solid var(--line);
  margin-top: 14px;
  font-size: 0.79rem; color: var(--muted2);
}
.topic-modules-preview strong { color: var(--ink); font-weight: 700; }
.meta { display: flex; gap: 8px; flex-wrap: wrap; padding: 10px 22px 0; }
.pill {
  border-radius: 999px; font-size: 0.71rem;
  font-weight: 800; padding: 4px 10px; border: 1px solid;
}
.pill-blue   { background:#eff6ff; color:#1d4ed8; border-color:#bfdbfe; }
.pill-purple { background:#f5f3ff; color:#6d28d9; border-color:#ddd6fe; }
.pill-green  { background:#ecfdf5; color:#065f46; border-color:#a7f3d0; }
.pill-orange { background:#fffbeb; color:#92400e; border-color:#fde68a; }
.pill-red    { background:#fef2f2; color:#991b1b; border-color:#fecaca; }
.pill-teal   { background:#ecfeff; color:#155e75; border-color:#a5f3fc; }
.pill:not([class*='pill-']) { background:var(--accent-soft); color:#1243b5; border-color:#c8d9ff; }
.topic-card .cta {
  margin: 14px 22px 22px;
  display: flex; align-items: center; justify-content: space-between;
  text-decoration: none;
  border: 1.5px solid var(--topic-color);
  background: var(--topic-bg);
  border-radius: 10px; padding: 11px 16px;
  font-weight: 800; font-size: 0.89rem;
  color: var(--topic-color);
  transition: var(--transition);
}
.topic-card .cta:hover { background: var(--topic-color); color: #fff; }
.cta-arrow { font-size: 1rem; }

/* ── Page Layout (Topic Pages) ─────────── */
.page-layout {
  display: grid;
  grid-template-columns: 248px 1fr;
  gap: 26px; align-items: start;
}
.sidebar {
  position: sticky; top: 72px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}
.sidebar-heading {
  font-size: 0.71rem; font-weight: 900;
  letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--muted2); margin-bottom: 12px;
  display: block;
}
.module-nav { display: flex; flex-direction: column; gap: 3px; }
.module-nav a {
  text-decoration: none; font-size: 0.82rem; font-weight: 600;
  color: var(--muted); padding: 7px 10px; border-radius: 8px;
  transition: var(--transition);
  display: flex; align-items: center; gap: 9px;
}
.module-nav a:hover, .module-nav a.active {
  background: var(--topic-bg); color: var(--topic-color);
}
.module-nav a .num {
  font-size: 0.69rem; font-weight: 900;
  min-width: 20px; height: 20px; border-radius: 50%;
  background: var(--line);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.module-nav a:hover .num, .module-nav a.active .num {
  background: var(--topic-color); color: #fff;
}
.sidebar-back {
  display: block; margin-top: 14px; padding-top: 14px;
  border-top: 1px solid var(--line);
  text-decoration: none; font-size: 0.82rem; font-weight: 700;
  color: var(--muted); text-align: center;
  transition: var(--transition);
}
.sidebar-back:hover { color: var(--accent); }

/* ── Module Cards ────────────────────────── */
.modules-list { display: flex; flex-direction: column; gap: 22px; }
.module {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  scroll-margin-top: 90px;
}
.module-head {
  border-left: 5px solid var(--topic-color);
  padding: 22px 26px 0;
}
.module-num-label {
  font-size: 0.71rem; font-weight: 900;
  letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--topic-color); margin-bottom: 6px;
  display: block;
}
.module h2 {
  font-size: 1.22rem; font-weight: 800;
  margin: 0 0 10px; letter-spacing: -0.02em;
}
.module-overview {
  color: var(--muted); font-size: 0.96rem;
  padding: 0 26px 18px;
  border-bottom: 1px solid var(--line); margin: 0;
}
.module-body { padding: 22px 26px; }
.section-label {
  font-size: 0.71rem; font-weight: 900;
  letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--muted2); margin: 22px 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.module-body > .section-label:first-child { margin-top: 0; }

/* Outcomes list */
.outcomes {
  margin: 0 0 0; padding-left: 0;
  list-style: none;
  display: flex; flex-direction: column; gap: 7px;
}
.outcomes li {
  padding: 8px 12px 8px 36px;
  background: var(--topic-bg); border: 1px solid var(--topic-border);
  border-radius: 8px; font-size: 0.9rem;
  position: relative;
}
.outcomes li::before {
  content: '✓'; position: absolute; left: 12px;
  color: var(--topic-color); font-weight: 900;
}

/* Content sections */
.content-section { margin-top: 18px; }
.content-section h3 { font-size: 0.98rem; font-weight: 800; margin: 0 0 10px; }
.content-section p { color: var(--muted); font-size: 0.92rem; margin: 0 0 10px; line-height: 1.7; }
.content-section ul, .content-section ol { padding-left: 20px; margin: 0 0 10px; }
.content-section li { color: var(--muted); font-size: 0.92rem; margin-bottom: 6px; line-height: 1.6; }

/* ── Info Boxes ──────────────────────────── */
.concept-box, .formula-box, .example-box, .insight-box, .warning-box, .data-box {
  border-radius: 10px; padding: 14px 16px; margin: 14px 0; font-size: 0.9rem;
}
.concept-box  { background:#eff6ff; border:1px solid #bfdbfe; border-left:4px solid #2563eb; }
.concept-box strong { color:#1d4ed8; }
.formula-box  { background:#f0fdf4; border:1px solid #bbf7d0; border-left:4px solid #16a34a; }
.formula-box strong { color:#15803d; }
.formula-box code {
  display:block; background:rgba(0,0,0,0.05); border-radius:6px;
  padding:8px 12px; margin:8px 0;
  font-family: ui-monospace,"Courier New",monospace;
  font-size:0.88em; color:#065f46; white-space: pre-wrap;
}
.example-box  { background:#fff7ed; border:1px solid #fed7aa; border-left:4px solid #ea580c; }
.example-box strong { color:#c2410c; }
.insight-box  { background:#faf5ff; border:1px solid #ddd6fe; border-left:4px solid #7c3aed; }
.insight-box strong { color:#6d28d9; }
.warning-box  { background:#fffbeb; border:1px solid #fde68a; border-left:4px solid #d97706; }
.warning-box strong { color:#b45309; }
.data-box     { background:#ecfeff; border:1px solid #a5f3fc; border-left:4px solid #0891b2; }
.data-box strong { color:#0e7490; }

.info-box-title {
  font-size: 0.71rem; font-weight: 900; letter-spacing: 0.07em;
  text-transform: uppercase; display: block; margin-bottom: 7px;
}
.info-box-content { margin: 0; line-height: 1.65; color: var(--muted); }
.info-box-content + .info-box-content { margin-top: 8px; }

/* ── Key Takeaways ───────────────────────── */
.takeaways {
  margin: 0; padding: 0; list-style: none;
  display: grid; grid-template-columns: repeat(2,1fr); gap: 10px;
}
.takeaways li {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--topic-color);
  border-radius: 8px; padding: 12px 14px;
  font-size: 0.87rem; font-weight: 600; color: var(--ink);
  line-height: 1.55;
}

/* ── References ──────────────────────────── */
.refs {
  margin-top: 26px; background: #fff;
  border: 1px dashed #9fb9f9; border-radius: var(--radius);
  padding: 22px 26px;
}
.refs h3 { margin: 0 0 14px; font-size: 1rem; font-weight: 800; }
.refs ul { margin: 0; padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 9px; }
.refs li { font-size: 0.87rem; color: var(--muted); line-height: 1.55; padding-left: 16px; position: relative; }
.refs li::before { content: '›'; position: absolute; left: 0; color: var(--accent); font-weight: 900; }
.refs li strong { color: var(--ink); }

/* ── Section Card ────────────────────────── */
.section-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 26px;
  margin-top: 20px; box-shadow: var(--shadow-sm);
}
.section-card h3 { margin: 0 0 12px; }
.section-card p, .section-card li { color: var(--muted); font-size: 0.92rem; }

/* ── Curriculum Banner ───────────────────── */
.curriculum-banner {
  background: linear-gradient(135deg, var(--topic-bg) 0%, #fff 100%);
  border: 1px solid var(--topic-border);
  border-radius: var(--radius);
  padding: 22px 26px; margin-bottom: 26px;
  display: flex; gap: 20px; align-items: center;
}
.curriculum-banner-icon { font-size: 2.4rem; flex-shrink: 0; }
.curriculum-banner-text h2 { margin: 0 0 6px; font-size: 1.05rem; font-weight: 800; }
.curriculum-banner-text p { margin: 0; font-size: 0.89rem; color: var(--muted); }

/* ── Footer ──────────────────────────────── */
footer {
  margin-top: 30px; padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 0.82rem; color: var(--muted2); line-height: 1.6;
}

/* ── Utilities ───────────────────────────── */
.hidden { display: none !important; }
.mt-0 { margin-top: 0 !important; }

/* ── Responsive ─────────────────────────── */
@media (max-width: 1060px) {
  .page-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .module-nav { flex-direction: row; flex-wrap: wrap; }
  .module-nav a { font-size: 0.78rem; padding: 5px 9px; }
  .module-nav a .num { display: none; }
}
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 620px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 26px 18px 22px; }
  .hero h1 { font-size: 1.75rem; }
  .hero-stats { gap: 16px; }
  .module-head { padding: 18px 16px 0; }
  .module-overview { padding: 0 16px 16px; }
  .module-body { padding: 18px 16px; }
  .refs { padding: 18px 16px; }
  .takeaways { grid-template-columns: 1fr; }
  .container { padding: 14px 12px 40px; }
  .topbar-inner { padding: 12px 14px; }
}