/* ==========================================================================
   VB DYNAMICS RESOURCE CENTRE — MASTER HUB & EDITORIAL STYLESHEET
   Brand fonts: 'Fraunces' (Display Serif) & 'Inter' (Interface Sans)
   Accent: Brass #A9782F / Slate #0F172A / Paper #FBFAF7
   ========================================================================== */

:root {
  --ink: #141722;
  --ink-soft: #2E3445;
  --graphite: #647087;
  --graphite-light: #94A3B8;
  --paper: #FFFFFF;
  --bg: #FBFBFA;
  --bg-subtle: #F3F4F6;
  --line: #E5E7EB;
  --line-strong: #D1D5DB;

  --brass: #A9782F;
  --brass-dark: #875F22;
  --brass-tint: #FDF8F0;
  --brass-border: #F1DEC5;

  --teal: #0D7A5F;
  --teal-tint: #ECFDF5;
  --teal-border: #A7F3D0;

  --blue: #1D4ED8;
  --blue-tint: #EFF6FF;
  --blue-border: #BFDBFE;

  --amber: #B45309;
  --amber-tint: #FFFBEB;
  --amber-border: #FDE68A;

  --crimson: #BE123C;
  --crimson-tint: #FFF1F2;
  --crimson-border: #FECDD3;

  --font-serif: 'Fraunces', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-card: 0 2px 8px -2px rgba(15, 23, 42, 0.08), 0 12px 24px -8px rgba(15, 23, 42, 0.06);
  --shadow-pop: 0 10px 30px -5px rgba(15, 23, 42, 0.12);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.65;
}

a {
  color: var(--brass-dark);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--ink);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   SITE HEADER & MEGA NAVIGATION
   ========================================================================== */

.hub-nav-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.hub-nav-header__top {
  background: var(--ink);
  color: #E2E8F0;
  font-size: 12px;
  padding: 6px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hub-nav-header__top-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hub-nav-header__top-link {
  color: #F8FAFC;
  font-weight: 500;
}
.hub-nav-header__top-link:hover {
  color: var(--brass);
  text-decoration: none;
}

.hub-nav-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.hub-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
}

.hub-logo__symbol {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--ink) 0%, #1E293B 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #F59E0B;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
}

.hub-logo__text {
  display: flex;
  flex-direction: column;
}

.hub-logo__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
  line-height: 1.15;
}

.hub-logo__sub {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--brass);
}

.hub-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.hub-menu__item {
  position: relative;
}

.hub-menu__link {
  display: block;
  padding: 8px 12px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
  text-decoration: none;
}

.hub-menu__link:hover,
.hub-menu__link.is-active {
  background: var(--bg-subtle);
  color: var(--ink);
  text-decoration: none;
}

.hub-menu__cta {
  background: var(--ink);
  color: #FFFFFF !important;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px;
  text-decoration: none !important;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
  transition: background 0.15s ease;
}

.hub-menu__cta:hover {
  background: var(--brass-dark);
}

/* Mobile Nav Toggle */
.hub-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px;
  cursor: pointer;
}

@media (max-width: 900px) {
  .hub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    padding: 16px 20px;
    border-bottom: 2px solid var(--line);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08);
  }
  .hub-menu.is-open {
    display: flex;
  }
  .hub-nav-toggle {
    display: block;
  }
}

/* ==========================================================================
   LAYOUT CONTAINERS
   ========================================================================== */

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 20px;
}

.wrap--wide {
  max-width: 1140px;
}

.wrap--full {
  max-width: 1240px;
}

/* ==========================================================================
   HERO HEADINGS & BREADCRUMBS
   ========================================================================== */

.hub-hero {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #FFFFFF 0%, var(--bg) 100%);
}

.hub-breadcrumb {
  font-size: 13px;
  color: var(--graphite);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.hub-breadcrumb a {
  color: var(--graphite);
  text-decoration: none;
}
.hub-breadcrumb a:hover {
  color: var(--ink);
  text-decoration: underline;
}

.hub-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.hub-badge--brass {
  background: var(--brass-tint);
  color: var(--brass-dark);
  border: 1px solid var(--brass-border);
}

.hub-badge--teal {
  background: var(--teal-tint);
  color: var(--teal);
  border: 1px solid var(--teal-border);
}

.hub-badge--blue {
  background: var(--blue-tint);
  color: var(--blue);
  border: 1px solid var(--blue-border);
}

.hub-hero__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(28px, 4.2vw, 40px);
  line-height: 1.18;
  color: var(--ink);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.hub-hero__lead {
  font-size: 17.5px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 68ch;
  margin: 0 0 20px;
}

.hub-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--graphite);
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.hub-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   ARTICLE & EDITORIAL STYLING
   ========================================================================== */

.article-content {
  padding: 36px 0 60px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3.2vw, 28px);
  font-weight: 600;
  color: var(--ink);
  margin: 44px 0 16px;
  line-height: 1.25;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.article-content h3 {
  font-family: var(--font-sans);
  font-size: 18.5px;
  font-weight: 700;
  color: var(--ink);
  margin: 28px 0 10px;
  line-height: 1.35;
}

.article-content p {
  margin: 0 0 18px;
}

.article-content ul,
.article-content ol {
  margin: 0 0 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content strong {
  color: var(--ink);
  font-weight: 600;
}

/* Callout Boxes */
.callout {
  padding: 18px 22px;
  border-radius: var(--radius);
  margin: 24px 0;
  font-size: 15px;
  line-height: 1.65;
  border-left: 4px solid;
}

.callout--official {
  background: var(--blue-tint);
  border-color: var(--blue);
  color: #1E3A8A;
}

.callout--tip {
  background: var(--teal-tint);
  border-color: var(--teal);
  color: #064E3B;
}

.callout--warning {
  background: var(--amber-tint);
  border-color: var(--amber);
  color: #78350F;
}

.callout--danger {
  background: var(--crimson-tint);
  border-color: var(--crimson);
  color: #881337;
}

.callout h4 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Quick Answer Highlight (Search-Intent Satisfier) */
.quick-answer {
  background: #FFFFFF;
  border: 2px solid var(--brass);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin: 24px 0 32px;
  box-shadow: var(--shadow-sm);
}

.quick-answer__label {
  font-size: 11.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brass-dark);
  margin-bottom: 8px;
  display: block;
}

.quick-answer p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   WORKED SOLUTIONS & MATH/SCIENCE DRILLS
   ========================================================================== */

.worked-solution {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  margin: 28px 0;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.worked-solution__header {
  background: var(--ink);
  color: #FFFFFF;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.worked-solution__title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: #FFFFFF;
  margin: 0;
}

.worked-solution__marks {
  background: var(--brass);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
}

.worked-solution__body {
  padding: 20px 24px;
}

.worked-solution__question {
  background: var(--bg-subtle);
  border-left: 3px solid var(--graphite);
  padding: 14px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 20px;
  font-size: 15px;
}

.worked-step {
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 2px solid var(--brass-border);
}

.worked-step__title {
  font-weight: 700;
  font-size: 14px;
  color: var(--brass-dark);
  margin-bottom: 4px;
}

.worked-step__math {
  font-family: var(--font-mono);
  background: #F8FAFC;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid #E2E8F0;
  font-size: 14px;
  color: var(--ink);
  margin: 6px 0;
  overflow-x: auto;
}

.worked-memo-breakdown {
  background: var(--teal-tint);
  border: 1px solid var(--teal-border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 13.5px;
  color: #064E3B;
  margin-top: 14px;
}

/* ==========================================================================
   DATA & COMPARISON TABLES
   ========================================================================== */

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14.5px;
}

.data-table th {
  background: var(--bg-subtle);
  color: var(--ink);
  font-weight: 700;
  padding: 12px 16px;
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: #FAFAFA;
}

/* ==========================================================================
   GRID CARDS (UNIVERSITIES, CAREERS, HUBS)
   ========================================================================== */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.feature-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
  border-color: var(--brass-border);
}

.feature-card__badge {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.feature-card__title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 8px;
  line-height: 1.25;
}

.feature-card__desc {
  font-size: 14px;
  color: var(--graphite);
  margin: 0 0 16px;
  flex-grow: 1;
}

.feature-card__meta-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.feature-card__meta-list li {
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
}

.feature-card__link {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--brass-dark);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   CV TEMPLATE & PRESET CARDS
   ========================================================================== */

.preset-banner {
  background: linear-gradient(135deg, var(--ink) 0%, #1E293B 100%);
  color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin: 32px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-card);
}

.preset-banner__text h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  color: #FFFFFF;
  margin: 0 0 6px;
}

.preset-banner__text p {
  color: #CBD5E1;
  font-size: 14.5px;
  margin: 0;
  max-width: 50ch;
}

.btn-builder-preset {
  background: var(--brass);
  color: var(--ink) !important;
  font-weight: 700;
  font-size: 14px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  text-decoration: none !important;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.15s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.btn-builder-preset:hover {
  background: #D97706;
  transform: translateY(-1px);
}

/* ==========================================================================
   INTERACTIVE TOOLS (APS CALCULATOR & STUDY PLANNER)
   ========================================================================== */

.tool-container {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 32px 0;
  box-shadow: var(--shadow-card);
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

@media (max-width: 768px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.form-select,
.form-input {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  font-family: inherit;
  color: var(--ink);
  transition: border-color 0.15s ease;
}

.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--brass);
  box-shadow: 0 0 0 3px rgba(169, 120, 47, 0.15);
}

.score-display-card {
  background: var(--ink);
  color: #FFFFFF;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.score-number {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 700;
  color: #F59E0B;
  line-height: 1;
  margin: 10px 0;
}

.score-eligibility {
  font-size: 14px;
  color: #E2E8F0;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */

.hub-faq {
  margin: 40px 0;
}

.hub-faq details {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 12px;
  transition: border-color 0.15s ease;
}

.hub-faq details[open] {
  border-color: var(--brass-border);
  box-shadow: var(--shadow-sm);
}

.hub-faq summary {
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hub-faq summary::-webkit-details-marker {
  display: none;
}

.hub-faq summary::after {
  content: '+';
  font-size: 18px;
  color: var(--brass);
  font-weight: 700;
}

.hub-faq details[open] summary::after {
  content: '–';
}

.hub-faq p {
  margin: 12px 0 0;
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* ==========================================================================
   GLOBAL FOOTER
   ========================================================================== */

.hub-footer {
  background: var(--ink);
  color: #94A3B8;
  font-size: 13.5px;
  padding: 60px 0 30px;
  border-top: 1px solid #1E293B;
  margin-top: 60px;
}

.hub-footer a {
  color: #CBD5E1;
  text-decoration: none;
}

.hub-footer a:hover {
  color: #F8FAFC;
  text-decoration: underline;
}

.hub-footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 40px;
}

@media (max-width: 900px) {
  .hub-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 550px) {
  .hub-footer__grid {
    grid-template-columns: 1fr;
  }
}

.hub-footer__col h4 {
  color: #FFFFFF;
  font-family: var(--font-serif);
  font-size: 15px;
  margin: 0 0 14px;
}

.hub-footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hub-footer__col li {
  margin-bottom: 8px;
}

.hub-footer__bottom {
  padding-top: 24px;
  border-top: 1px solid #1E293B;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12.5px;
}