/* MSC Centers, msccenters.com */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --green:     #1a5c3e;
  --green-lt:  #22784f;
  --green-dim: rgba(26,92,62,0.12);
  --dark:      #0e1520;
  --dark-mid:  #1c2537;
  --cream:     #f2ede5;
  --cream-dk:  #e8e1d4;
  --white:     #ffffff;
  --text:      #1a2133;
  --muted:     #576071;
  --muted-lt:  #8493a8;
  --amber:     #b87e14;
  --border:    #dde1e8;
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', system-ui, -apple-system, sans-serif; color: var(--text); line-height: 1.65; }
img  { max-width: 100%; height: auto; display: block; }
a    { color: inherit; text-decoration: none; }

/* TYPOGRAPHY */
h1, h2, h3 {
  font-family: 'DM Serif Display', Georgia, serif;
  line-height: 1.2;
}

/* =====================
   NAV
   ===================== */
nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--dark);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5%; height: 64px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.nav-brand {
  color: white; font-size: 1.05rem; font-weight: 700;
  letter-spacing: 0.4px; font-family: 'Inter', sans-serif;
}
.nav-brand span { color: var(--green-lt); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: rgba(255,255,255,0.72); font-size: 0.875rem; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: white; }
.nav-links a.is-active { color: white; }
.nav-cta {
  background: var(--green); color: white !important;
  padding: 8px 20px; border-radius: 5px; font-weight: 600 !important;
  transition: background .2s;
}
.nav-cta:hover { background: var(--green-lt) !important; }

/* =====================
   HERO
   ===================== */
.hero {
  background: var(--dark);
  padding: 88px 5% 0;
}
.hero-inner {
  max-width: 820px;
  padding-bottom: 72px;
}
.hero-label {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--green-lt);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.2rem, 4.8vw, 3.6rem);
  color: white;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero h1 em { color: var(--green-lt); font-style: italic; }
.hero-sub {
  font-size: 1.05rem; color: rgba(255,255,255,0.68);
  max-width: 560px; margin-bottom: 40px; line-height: 1.7;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Stats bar at bottom of hero */
.stats-bar {
  display: flex; align-items: center;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 0;
}
.stat-item {
  padding: 22px 36px;
  display: flex; flex-direction: column; gap: 4px;
}
.stat-item strong {
  font-size: 1.5rem; font-weight: 700;
  color: var(--amber); line-height: 1;
  font-family: 'Inter', sans-serif;
}
.stat-item span {
  font-size: 0.72rem; color: rgba(255,255,255,0.5);
  text-transform: uppercase; letter-spacing: 1px;
}
.stat-divider {
  width: 1px; height: 40px;
  background: rgba(255,255,255,0.1);
  flex-shrink: 0;
}

/* =====================
   BUTTONS
   ===================== */
.btn {
  display: inline-block; padding: 12px 28px;
  border-radius: 5px; font-weight: 600; font-size: 0.92rem;
  transition: all .2s; font-family: 'Inter', sans-serif;
}
.btn-green { background: var(--green); color: white; }
.btn-green:hover { background: var(--green-lt); transform: translateY(-1px); }

.btn-outline-white {
  background: transparent; color: rgba(255,255,255,0.85);
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-outline-white:hover { border-color: rgba(255,255,255,0.7); color: white; background: rgba(255,255,255,0.06); }

.btn-outline-green {
  background: transparent; color: var(--green-lt);
  border: 1.5px solid var(--green-lt);
}
.btn-outline-green:hover { background: var(--green-dim); }

.btn-outline-dark {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline-dark:hover { border-color: var(--green); color: var(--green); }

/* =====================
   SECTION BASES
   ===================== */
section { padding: 80px 5%; }
.section-white  { background: var(--white); }
.section-cream  { background: var(--cream); }
.section-dark   { background: var(--dark-mid); }

.section-intro {
  max-width: 1100px; margin: 0 auto 48px;
  text-align: center;
}
.section-intro h2 {
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  margin-bottom: 14px; color: var(--text);
}
.section-intro p {
  font-size: 1rem; color: var(--muted); max-width: 560px; margin: 0 auto;
}
.section-intro--left { text-align: left; }
.section-intro--left p { margin: 0; }
.section-cta-row { max-width: 1100px; margin: 36px auto 0; }

/* =====================
   ACCESS TRACKS
   ===================== */
.tracks {
  display: flex; flex-direction: column; gap: 2px;
  max-width: 1100px; margin: 0 auto;
  border-radius: 4px; overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}
.track-card {
  display: flex; align-items: stretch;
  background: white;
  border-left: 4px solid var(--green);
  padding: 28px 32px;
  transition: background .15s;
  gap: 24px;
}
.track-card:hover { background: #fafaf7; }
.track-num {
  font-size: 2.2rem; font-weight: 700; color: var(--cream-dk);
  font-family: 'DM Serif Display', Georgia, serif;
  line-height: 1; padding-top: 4px;
  min-width: 44px;
}
.track-body { flex: 1; }
.track-label {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--green);
  margin-bottom: 6px;
}
.track-card h3 {
  font-size: 1.2rem; color: var(--text); margin-bottom: 8px;
  font-family: 'Inter', sans-serif; font-weight: 700;
}
.track-card p { font-size: 0.875rem; color: var(--muted); margin-bottom: 14px; line-height: 1.6; }
.track-link {
  font-size: 0.85rem; font-weight: 600; color: var(--green);
}

/* =====================
   DIFFERENTIATORS
   ===================== */
.diff-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; max-width: 1100px; margin: 0 auto;
  align-items: start;
}
.diff-left h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  color: var(--text); margin-bottom: 20px;
}
.diff-left p { font-size: 0.95rem; color: var(--muted); margin-bottom: 16px; line-height: 1.75; }
.diff-left .btn-outline-green { margin-top: 8px; }

.diff-stat-block { display: flex; flex-direction: column; gap: 1px; }
.diff-stat {
  background: white;
  border-left: 3px solid var(--green);
  padding: 20px 24px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.diff-stat strong {
  display: block; font-size: 2rem; font-weight: 700;
  color: var(--amber); line-height: 1; margin-bottom: 6px;
  font-family: 'Inter', sans-serif;
}
.diff-stat div { font-size: 0.875rem; color: var(--muted); line-height: 1.5; }

/* =====================
   ABOUT UCT-MSCs
   ===================== */
.about-layout {
  display: grid; grid-template-columns: 1fr 380px;
  gap: 64px; max-width: 1100px; margin: 0 auto;
  align-items: start;
}
.about-kicker {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--green);
  margin-bottom: 14px;
}
.about-text h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  margin-bottom: 20px; color: var(--text);
}
.about-text p { font-size: 0.95rem; color: var(--muted); margin-bottom: 16px; line-height: 1.75; }
.about-text .btn-outline-dark { margin-top: 8px; }

.sidebar-block {
  background: var(--cream); padding: 28px; border-radius: 4px;
  margin-bottom: 12px;
}
.sidebar-block--dark { background: var(--dark-mid); }
.sidebar-block h4 {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 1px;
  text-transform: uppercase; color: var(--text);
  margin-bottom: 16px; font-family: 'Inter', sans-serif;
}
.sidebar-block--dark h4 { color: rgba(255,255,255,0.7); }
.sidebar-block--dark p { font-size: 0.85rem; color: rgba(255,255,255,0.55); line-height: 1.7; }

.bullet-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.bullet-list li {
  font-size: 0.875rem; color: var(--muted);
  padding-left: 18px; position: relative;
}
.bullet-list li::before {
  content: '';
  position: absolute; left: 0; top: 8px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green);
}

/* =====================
   RESEARCH LIBRARY
   ===================== */
.search-wrap {
  max-width: 1100px; margin: 0 auto 40px;
  display: flex; gap: 0;
}
.search-wrap input {
  flex: 1; padding: 13px 18px;
  border: 1.5px solid var(--cream-dk); border-radius: 5px 0 0 5px;
  font-size: 0.95rem; outline: none;
  border-right: none; background: white;
  font-family: 'Inter', sans-serif;
}
.search-wrap input:focus { border-color: var(--green); }
.search-wrap button {
  background: var(--green); color: white; border: none;
  padding: 13px 26px; border-radius: 0 5px 5px 0;
  font-weight: 600; cursor: pointer; font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
}
.search-wrap button:hover { background: var(--green-lt); }

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px; max-width: 1100px; margin: 0 auto;
}
.research-card {
  background: white; padding: 24px;
  border-left: 3px solid var(--green);
  border-radius: 0 6px 6px 0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.research-card .tag {
  font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1.5px; color: var(--green); margin-bottom: 10px; display: block;
}
.research-card h4 { font-size: 0.925rem; font-weight: 600; color: var(--text); margin-bottom: 8px; line-height: 1.45; font-family: 'Inter', sans-serif; }
.research-card p  { font-size: 0.845rem; color: var(--muted); line-height: 1.6; }

/* =====================
   FAQ, asymmetric layout
   ===================== */
.faq-layout {
  display: grid; grid-template-columns: 260px 1fr;
  gap: 64px; max-width: 1100px; margin: 0 auto;
  align-items: start;
}
.faq-heading h2 {
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  color: var(--text);
  position: sticky; top: 80px;
}

details { border-bottom: 1px solid var(--border); }
details summary {
  padding: 18px 0; font-weight: 600; cursor: pointer;
  color: var(--text); list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.95rem;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: '+'; font-size: 1.3rem; color: var(--green);
  transition: transform .2s; flex-shrink: 0; margin-left: 16px;
}
details[open] summary::after { content: '\2212'; }
details p { padding: 0 0 18px; color: var(--muted); font-size: 0.9rem; line-height: 1.75; }
.faq-footer { padding-top: 28px; }

/* =====================
   CTA SECTION
   ===================== */
.section-cta {
  background: var(--dark);
  padding: 88px 5%;
}
.cta-inner { max-width: 640px; }
.cta-inner h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: white; margin-bottom: 16px;
}
.cta-inner p { font-size: 1rem; color: rgba(255,255,255,0.65); margin-bottom: 32px; line-height: 1.7; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 20px; }
.cta-note { font-size: 0.78rem; color: rgba(255,255,255,0.35); }

/* =====================
   FOOTER
   ===================== */
footer { background: #080f1a; color: rgba(255,255,255,0.55); padding: 56px 5% 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand-name { color: white; font-size: 1rem; font-weight: 700; margin-bottom: 14px; font-family: 'Inter', sans-serif; }
.footer-brand-name span { color: var(--green-lt); }
.footer-brand p { font-size: 0.85rem; line-height: 1.75; }
.footer-col h4 { color: rgba(255,255,255,0.9); font-size: 0.72rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 1.5px; text-transform: uppercase; font-family: 'Inter', sans-serif; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 0.855rem; color: rgba(255,255,255,0.5); transition: color .2s; }
.footer-col ul a:hover { color: var(--green-lt); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; font-size: 0.78rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer-bottom a { color: rgba(255,255,255,0.35); }
.footer-bottom a:hover { color: rgba(255,255,255,0.6); }
.disclaimer { font-size: 0.73rem; color: rgba(255,255,255,0.28); margin-top: 20px; font-style: italic; line-height: 1.7; }

/* =====================
   FORM (register.html)
   ===================== */
.form-page { background: var(--cream); min-height: calc(100vh - 64px); padding: 64px 5%; }
.form-wrap { max-width: 580px; margin: 0 auto; background: white; border-radius: 4px; padding: 44px; box-shadow: 0 4px 24px rgba(0,0,0,0.08); }
.form-wrap h2 { font-size: 1.8rem; color: var(--text); margin-bottom: 6px; }
.form-subtitle { color: var(--muted); font-size: 0.9rem; margin-bottom: 32px; line-height: 1.6; }
.track-tabs { display: flex; gap: 0; margin-bottom: 36px; border: 1.5px solid var(--border); border-radius: 6px; overflow: hidden; }
.track-tab {
  flex: 1; padding: 10px 8px; text-align: center;
  font-size: 0.8rem; font-weight: 600; cursor: pointer;
  color: var(--muted); background: transparent; border: none;
  border-right: 1px solid var(--border); font-family: 'Inter', sans-serif;
  transition: background .15s, color .15s;
}
.track-tab:last-child { border-right: none; }
.track-tab.active { background: var(--green); color: white; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; font-size: 0.82rem; margin-bottom: 6px; color: var(--text); letter-spacing: 0.2px; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--border); border-radius: 5px;
  font-size: 0.92rem; font-family: 'Inter', sans-serif;
  transition: border-color .2s; color: var(--text);
  background: white;
}
.form-group textarea { resize: vertical; min-height: 96px; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { outline: none; border-color: var(--green); }
.form-group .optional { font-weight: 400; color: var(--muted-lt); margin-left: 4px; }

.form-consent { font-size: 0.8rem; color: var(--muted-lt); line-height: 1.5; margin: 4px 0 16px; }

.checkbox-group { display: flex; flex-direction: column; gap: 10px; }
.checkbox-label { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--text); cursor: pointer; }
.checkbox-label input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--green); cursor: pointer; }

.form-submit {
  width: 100%; padding: 14px; background: var(--green); color: white;
  border: none; border-radius: 5px; font-weight: 700; font-size: 0.95rem;
  cursor: pointer; transition: background .2s; font-family: 'Inter', sans-serif;
  margin-top: 8px;
}
.form-submit:hover { background: var(--green-lt); }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.form-success {
  text-align: center; padding: 24px 0;
}
.form-success h3 { font-size: 1.5rem; color: var(--text); margin-bottom: 12px; }
.form-success p { color: var(--muted); font-size: 0.95rem; line-height: 1.7; }
.form-success .success-icon {
  width: 56px; height: 56px; background: var(--green-dim);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
}
.form-success .success-icon svg { width: 28px; height: 28px; stroke: var(--green); }

.form-error {
  background: #fef2f2; border: 1px solid #fecaca;
  border-radius: 5px; padding: 14px 16px;
  font-size: 0.875rem; color: #b91c1c;
  margin-top: 16px; display: none;
}

/* =====================
   SHARED INNER-PAGE HERO + CONTENT (about / faq / research / products / contact / legal)
   ===================== */
.page-hero { background: var(--dark); padding: 72px 5% 64px; }
.page-hero h1 { color: white; font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 16px; }
.page-hero p { color: rgba(255,255,255,0.65); font-size: 1.05rem; max-width: 560px; }
.content-section { padding: 72px 5%; max-width: 1100px; margin: 0 auto; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; margin-bottom: 72px; }
.content-section h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 20px; color: var(--text); }
.content-section p { font-size: 1rem; color: var(--muted); line-height: 1.75; margin-bottom: 16px; }
.kicker { font-size: 0.72rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--green); margin-bottom: 12px; }
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 32px 0; }
.stat-box { background: var(--cream); border-radius: 4px; padding: 24px; }
.stat-box strong { display: block; font-size: 2rem; color: var(--amber); font-family: 'Inter', sans-serif; margin-bottom: 6px; }
.stat-box span { font-size: 0.88rem; color: var(--muted); }
.feature-list { list-style: none; margin: 20px 0; }
.feature-list li { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.95rem; color: var(--muted); display: flex; gap: 12px; }
.feature-list li::before { content: ""; display: block; width: 6px; height: 6px; background: var(--green); border-radius: 50%; margin-top: 8px; flex-shrink: 0; }
.dark-band { background: var(--dark); padding: 72px 5%; }
.dark-band .content-section { color: white; }
.dark-band h2 { color: white; }
.dark-band p { color: rgba(255,255,255,0.65); }
.sourcing-step { display: flex; gap: 20px; margin-bottom: 28px; }
.step-num { width: 36px; height: 36px; background: var(--green); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-weight: 700; font-size: 0.85rem; flex-shrink: 0; }
.step-body h4 { color: white; margin-bottom: 6px; font-size: 1rem; font-family: 'Inter', sans-serif; font-weight: 600; }
.step-body p { font-size: 0.9rem; color: rgba(255,255,255,0.6); margin-bottom: 0; }

/* =====================
   ACCESS TRACK CARD VARIANTS, index.html: deliberately asymmetric, not a repeated template
   ===================== */
.track-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.track-tag { font-size: 0.78rem; font-weight: 600; color: var(--green); background: var(--green-dim); padding: 4px 10px; border-radius: 3px; }
.track-bullets { list-style: none; margin-bottom: 14px; }
.track-bullets li { font-size: 0.875rem; color: var(--muted); padding-left: 16px; position: relative; margin-bottom: 6px; }
.track-bullets li::before { content: ''; position: absolute; left: 0; top: 7px; width: 5px; height: 5px; border-radius: 50%; background: var(--green); }

/* =====================
   DOCUMENTATION PREVIEW, index.html: replaces the old free text search box
   ===================== */
.doc-chip-row { display: flex; flex-wrap: wrap; gap: 10px; max-width: 1100px; margin: 0 auto 40px; }
.doc-chip { font-size: 0.85rem; font-weight: 600; color: var(--green); background: white; border: 1.5px solid var(--cream-dk); padding: 9px 16px; border-radius: 4px; transition: border-color .2s, background .2s; }
.doc-chip:hover { border-color: var(--green); background: var(--green-dim); }

/* =====================
   TECHNICAL DOCUMENTATION / RESEARCH.HTML
   ===================== */
.research-section { padding: 48px 5% 72px; background: var(--cream); }
.research-cat-title { font-size: 0.72rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--green); margin-bottom: 20px; margin-top: 48px; }
.research-cat-title:first-child { margin-top: 0; }
.paper-card { background: white; border: 1px solid var(--border); border-radius: 4px; padding: 28px 32px; margin-bottom: 16px; display: flex; gap: 24px; align-items: flex-start; transition: box-shadow .2s; }
.paper-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.07); }
.paper-tag { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; padding: 4px 10px; border-radius: 4px; background: var(--green-dim); color: var(--green); white-space: nowrap; margin-top: 2px; min-width: 100px; text-align: center; }
.paper-tag.amber { background: rgba(184,126,20,0.1); color: var(--amber); }
.paper-tag.blue { background: rgba(30,80,160,0.08); color: #1e50a0; }
.paper-body { flex: 1; }
.paper-body h4 { font-family: 'Inter', sans-serif; font-weight: 700; font-size: 1.05rem; color: var(--text); margin-bottom: 8px; line-height: 1.35; }
.paper-body p { font-size: 0.9rem; color: var(--muted); line-height: 1.6; margin-bottom: 12px; }
.paper-meta { font-size: 0.78rem; color: var(--muted-lt); }
.paper-meta strong { color: var(--muted); }
.doc-note { background: white; border: 1px dashed var(--cream-dk); border-radius: 4px; padding: 20px 24px; font-size: 0.875rem; color: var(--muted); line-height: 1.7; margin-top: 32px; }
.cta-register { background: var(--dark); padding: 72px 5%; text-align: center; }
.cta-register h2 { color: white; font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 14px; }
.cta-register p { color: rgba(255,255,255,0.6); max-width: 480px; margin: 0 auto 32px; }

/* =====================
   CONTACT / TERMS / PRIVACY
   ===================== */
.legal-page { padding: 64px 5% 96px; max-width: 820px; margin: 0 auto; }
.legal-page h2 { font-size: 1.4rem; color: var(--text); margin: 40px 0 12px; font-family: 'Inter', sans-serif; font-weight: 700; }
.legal-page h2:first-child { margin-top: 0; }
.legal-page p, .legal-page li { font-size: 0.92rem; color: var(--muted); line-height: 1.75; margin-bottom: 14px; }
.legal-page ul { padding-left: 20px; }
.legal-updated { font-size: 0.8rem; color: var(--muted-lt); margin-bottom: 40px; }
.contact-card { background: var(--cream); border-radius: 4px; padding: 36px; margin-bottom: 24px; }
.contact-card h3 { font-family: 'Inter', sans-serif; font-size: 1.1rem; color: var(--text); margin-bottom: 10px; }
.contact-card p { font-size: 0.92rem; color: var(--muted); line-height: 1.7; margin-bottom: 18px; }

/* =====================
   RESPONSIVE
   ===================== */
@media (max-width: 900px) {
  .diff-layout    { grid-template-columns: 1fr; gap: 40px; }
  .about-layout   { grid-template-columns: 1fr; gap: 32px; }
  .faq-layout     { grid-template-columns: 1fr; gap: 24px; }
  .faq-heading h2 { position: static; }
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .nav-links   { display: none; }
  .stats-bar   { flex-wrap: wrap; }
  .stat-divider { display: none; }
  .stat-item   { padding: 16px 24px; }
  .track-card  { flex-direction: column; gap: 12px; }
  .track-num   { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  section { padding: 60px 4%; }
  .hero   { padding: 64px 4% 0; }
  .hero-inner { padding-bottom: 48px; }
  .form-wrap { padding: 28px 20px; }
  .cta-inner { max-width: 100%; }
}