:root {
  --navy:      #0D2137;
  --navy-mid:  #142A46;
  --navy-light:#1E3A54;
  --cyan:      #1E8EC9;
  --cyan-light:#4AAFD4;
  --cream:     #F0E8C8;
  --cream-dim: #D8CFA8;
  --gold:      #E8A030;
  --gold-dim:  #C4852A;
  --purple:    #2A3F6F;
  --white:     #FFFFFF;
  --off-white: #F5F2EC;
  --gray-light:#E8E4DC;
  --gray-mid:  #8A8A8A;
  --text-dark: #1A1A2E;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  color: var(--text-dark);
  background: var(--navy);
  overflow-x: hidden;
}

/* ── TYPOGRAPHY ─────────────────────────────────────── */
h1, h2, h3, .serif { font-family: 'Cormorant Garamond', serif; }

.display {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

/* ── NAV ────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.25rem 3rem;
  background: rgba(13, 33, 55, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(30, 142, 201, 0.15);
  transition: all 0.3s;
}
nav .logo {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
}
nav .logo span { color: var(--cream); font-weight: 300; }
nav ul { display: flex; gap: 2.5rem; list-style: none; }
nav ul a {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(240,232,200,0.7);
  text-decoration: none;
  transition: color 0.2s;
}
nav ul a:hover { color: var(--cyan-light); }
.nav-cta {
  background: var(--cyan);
  color: var(--navy) !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 2px;
  font-weight: 500 !important;
  transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--cyan-light) !important; color: var(--navy) !important; }

/* ── HERO ───────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 7rem 0 4rem;
}

.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(42,63,111,0.8) 0%, var(--navy) 60%),
              radial-gradient(ellipse at 30% 80%, rgba(30,142,201,0.12) 0%, transparent 50%);
}

.hero-grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(30,142,201,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,142,201,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero-left {
  position: relative; z-index: 2;
  padding: 0 3rem 0 6rem;
}

.hero-eyebrow {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.hero-eyebrow::before {
  content: '';
  display: block; width: 2rem; height: 1px;
  background: var(--cyan);
}

.hero-headline {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2.8rem, 4.5vw, 5rem);
  font-weight: 300;
  line-height: 1.05;
  color: var(--cream);
  margin-bottom: 1.5rem;
}
.hero-headline em {
  font-style: italic;
  color: var(--cyan-light);
}

.hero-sub {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.7;
  color: rgba(240,232,200,0.75);
  max-width: 480px;
  margin-bottom: 2.5rem;
}

.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--cyan);
  color: var(--navy);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.9rem 2rem;
  border-radius: 2px;
  transition: all 0.2s;
}
.btn-primary:hover { background: var(--cyan-light); transform: translateY(-1px); }
.btn-primary svg { width: 14px; height: 14px; }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border: 1px solid rgba(30,142,201,0.4);
  color: var(--cyan-light);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.9rem 2rem;
  border-radius: 2px;
  transition: all 0.2s;
}
.btn-secondary:hover {
  border-color: var(--cyan-light);
  background: rgba(30,142,201,0.08);
}

.hero-right {
  position: relative; z-index: 2;
  display: flex; justify-content: center; align-items: center;
  padding: 0 4rem 0 2rem;
}

.cover-wrap {
  position: relative;
}
.cover-wrap::before {
  content: '';
  position: absolute;
  inset: -20px;
  background: radial-gradient(ellipse at center, rgba(30,142,201,0.2) 0%, transparent 70%);
  border-radius: 8px;
}
.cover-img {
  width: 100%;
  max-width: 380px;
  border-radius: 4px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(30,142,201,0.2);
  position: relative; z-index: 1;
  transition: transform 0.4s;
}
.cover-img:hover { transform: translateY(-4px) rotate(0.5deg); }

/* ── PULL QUOTE BAND ─────────────────────────────────── */
.quote-band {
  background: linear-gradient(135deg, var(--cyan) 0%, #1565A0 100%);
  padding: 4rem 6rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.quote-band::before {
  content: '\201C';
  position: absolute; top: -2rem; left: 3rem;
  font-family: 'Cormorant Garamond', serif;
  font-size: 20rem;
  color: rgba(255,255,255,0.06);
  line-height: 1;
  pointer-events: none;
}
.quote-band blockquote {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  font-weight: 400;
  font-style: italic;
  color: var(--navy);
  max-width: 820px;
  margin: 0 auto 1.25rem;
  line-height: 1.4;
}
.quote-band cite {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(13,33,55,0.6);
}

/* ── SECTION BASE ───────────────────────────────────── */
section { position: relative; }

.section-light {
  background: var(--off-white);
  color: var(--text-dark);
}
.section-dark {
  background: var(--navy);
  color: var(--cream);
}
.section-mid {
  background: var(--navy-mid);
  color: var(--cream);
}
.section-cream {
  background: var(--cream);
  color: var(--navy);
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 3rem;
}

.section-pad { padding: 6rem 0; }

.section-eyebrow {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
  display: flex; align-items: center; gap: 0.75rem;
}
.section-eyebrow::before {
  content: ''; display: block; width: 1.5rem; height: 1px;
  background: var(--cyan);
}

.section-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  font-weight: 300;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}
.section-title.on-dark { color: var(--cream); }
.section-title.on-light { color: var(--navy); }

.section-body {
  font-size: 1.025rem;
  line-height: 1.8;
  font-weight: 300;
  max-width: 680px;
}
.section-body.on-dark { color: rgba(240,232,200,0.8); }
.section-body.on-light { color: rgba(26,26,46,0.8); }

/* ── THE PROBLEM ────────────────────────────────────── */
#problem .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
}
#problem .problem-quote {
  border-left: 3px solid var(--gold);
  padding-left: 2rem;
  margin: 2rem 0;
}
#problem .problem-quote p {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.3rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--cream);
}
#problem .problem-quote cite {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--gold-dim);
  margin-top: 0.75rem;
  font-style: normal;
}
#problem .problem-right {
  padding-top: 6rem;
}
#problem .stat-block {
  background: rgba(30,142,201,0.08);
  border: 1px solid rgba(30,142,201,0.2);
  border-left: 3px solid var(--cyan);
  padding: 1.75rem 2rem;
  margin-bottom: 1.5rem;
  border-radius: 0 4px 4px 0;
}
#problem .stat-block .stat-label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}
#problem .stat-block p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: rgba(240,232,200,0.8);
}

/* ── GLYCOLYSIS COMPARISON ──────────────────────────── */
#glycolysis {
  background: var(--off-white);
  padding: 6rem 0;
}
.glyco-intro {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 4rem;
}
.glyco-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--gray-light);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(26,26,46,0.1);
}
.glyco-col {
  padding: 3rem;
  background: white;
}
.glyco-col.logic-col {
  background: var(--navy);
}
.glyco-col-header {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid;
}
.fact-col .glyco-col-header {
  color: var(--gray-mid);
  border-color: var(--gray-light);
}
.logic-col .glyco-col-header {
  color: var(--cyan);
  border-color: rgba(30,142,201,0.3);
}
.glyco-col-text {
  font-size: 0.975rem;
  line-height: 1.8;
  font-weight: 300;
}
.fact-col .glyco-col-text { color: #555; }
.logic-col .glyco-col-text { color: rgba(240,232,200,0.85); }
.glyco-takeaway {
  margin-top: 2.5rem;
  background: linear-gradient(135deg, var(--navy) 0%, var(--purple) 100%);
  color: var(--cream);
  padding: 2.5rem 3rem;
  border-radius: 4px;
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.2rem;
  font-style: italic;
  line-height: 1.6;
  text-align: center;
}
.glyco-takeaway strong {
  color: var(--cyan-light);
  font-style: normal;
}

/* ── APPROACH / 9 DIFFERENTIATORS ───────────────────── */
#approach { background: var(--navy-mid); padding: 6rem 0; }
.approach-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  margin-bottom: 5rem;
  align-items: center;
}
.differentiators {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  background: rgba(30,142,201,0.1);
  border: 1px solid rgba(30,142,201,0.15);
  border-radius: 4px;
  overflow: hidden;
}
.diff-item {
  background: rgba(13,33,55,0.8);
  padding: 2rem 1.75rem;
  transition: background 0.2s;
  cursor: default;
}
.diff-item:hover { background: rgba(30,142,201,0.08); }
.diff-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.5rem;
  font-weight: 300;
  color: rgba(30,142,201,0.3);
  line-height: 1;
  margin-bottom: 0.75rem;
}
.diff-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--cream);
  margin-bottom: 0.6rem;
  line-height: 1.3;
}
.diff-body {
  font-size: 0.82rem;
  line-height: 1.65;
  color: rgba(240,232,200,0.55);
}

/* ── THE BOOK ───────────────────────────────────────── */
#book { background: var(--off-white); padding: 6rem 0; }
.book-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 5rem;
  align-items: start;
}
.book-cover-col { position: sticky; top: 7rem; }
.book-cover-col img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 20px 50px rgba(13,33,55,0.25);
}
.book-ctas { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; }
.btn-book {
  display: block;
  text-align: center;
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  border-radius: 3px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: all 0.2s;
}
.btn-book-primary {
  background: var(--navy);
  color: var(--cream);
}
.btn-book-primary:hover { background: var(--navy-light); }
.btn-book-secondary {
  border: 1px solid rgba(13,33,55,0.25);
  color: var(--navy);
}
.btn-book-secondary:hover { border-color: var(--navy); background: rgba(13,33,55,0.04); }

.book-content h3 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--navy);
  margin: 2.5rem 0 1rem;
}
.book-content h3:first-child { margin-top: 0; }
.book-content p {
  font-size: 0.975rem;
  line-height: 1.8;
  color: rgba(26,26,46,0.75);
  margin-bottom: 1.25rem;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--gray-light);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 1.5rem;
}
.feature-item {
  background: white;
  padding: 1.25rem 1.5rem;
}
.feature-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.3rem;
}
.feature-body {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--gray-mid);
}

.toc-unit {
  margin-bottom: 1.5rem;
}
.toc-unit-title {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 0.6rem;
  border-bottom: 1px solid var(--gray-light);
  padding-bottom: 0.4rem;
}
.toc-chapters {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.toc-chapter {
  font-size: 0.875rem;
  color: rgba(26,26,46,0.7);
  padding: 0.25rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.toc-chapter::before {
  content: '';
  display: block;
  width: 1rem; height: 1px;
  background: var(--gray-light);
  flex-shrink: 0;
}

/* ── COMPARISON (ALDOSTERONE) ───────────────────────── */
.comparison-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--gray-light);
  border-radius: 4px;
  overflow: hidden;
  margin: 2rem 0;
}
.comp-col { padding: 2rem; background: white; }
.comp-col.comp-logic { background: var(--navy); }
.comp-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--gray-light);
}
.comp-logic .comp-label { color: var(--cyan); border-color: rgba(30,142,201,0.25); }
.comp-col p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(26,26,46,0.7);
}
.comp-logic p { color: rgba(240,232,200,0.82); }

/* ── VIDEO SECTION ──────────────────────────────────── */
#video { background: var(--navy); padding: 6rem 0; }
.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 6px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.5);
  margin-bottom: 3rem;
}
.video-wrap video,
.video-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
}
.webinars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.webinar-card {
  background: rgba(30,142,201,0.06);
  border: 1px solid rgba(30,142,201,0.15);
  border-radius: 4px;
  padding: 1.5rem;
  text-decoration: none;
  transition: all 0.2s;
  display: block;
}
.webinar-card:hover {
  background: rgba(30,142,201,0.12);
  border-color: rgba(30,142,201,0.35);
  transform: translateY(-2px);
}
.webinar-num {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.8rem;
  color: rgba(30,142,201,0.3);
  margin-bottom: 0.5rem;
}
.webinar-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--cream);
  margin-bottom: 0.4rem;
  line-height: 1.4;
}
.webinar-sub {
  font-size: 0.78rem;
  color: var(--cyan-light);
  letter-spacing: 0.05em;
}

/* ── TESTIMONIALS ───────────────────────────────────── */
#testimonials { background: var(--navy-mid); padding: 6rem 0; }

.featured-quote {
  background: linear-gradient(135deg, rgba(30,142,201,0.15) 0%, rgba(42,63,111,0.3) 100%);
  border: 1px solid rgba(30,142,201,0.25);
  border-left: 4px solid var(--cyan);
  padding: 3rem 3.5rem;
  border-radius: 0 6px 6px 0;
  margin-bottom: 3rem;
  position: relative;
}
.featured-quote::before {
  content: '\201C';
  font-family: 'Cormorant Garamond', serif;
  font-size: 8rem;
  color: rgba(30,142,201,0.12);
  position: absolute;
  top: -1rem; left: 1.5rem;
  line-height: 1;
  pointer-events: none;
}
.featured-quote blockquote {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-style: italic;
  line-height: 1.55;
  color: var(--cream);
  margin-bottom: 1.25rem;
  position: relative; z-index: 1;
}
.featured-quote cite {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan-light);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}
.testimonial-card {
  background: rgba(13,33,55,0.6);
  border: 1px solid rgba(30,142,201,0.12);
  border-radius: 4px;
  padding: 2rem;
}
.testimonial-card.full-width {
  grid-column: 1 / -1;
}
.t-text {
  font-size: 0.925rem;
  line-height: 1.75;
  color: rgba(240,232,200,0.78);
  margin-bottom: 1.25rem;
  font-style: italic;
}
.t-attr {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.t-role {
  font-size: 0.72rem;
  color: rgba(240,232,200,0.4);
  margin-top: 0.2rem;
}

.eval-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}
.eval-card {
  background: rgba(30,142,201,0.05);
  border: 1px solid rgba(30,142,201,0.1);
  border-radius: 4px;
  padding: 1.5rem 1.75rem;
  position: relative;
}
.eval-card::before {
  content: '\201C';
  font-family: 'Cormorant Garamond', serif;
  font-size: 3rem;
  color: rgba(30,142,201,0.2);
  position: absolute;
  top: 0.5rem; left: 1rem;
  line-height: 1;
}
.eval-card p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(240,232,200,0.7);
  font-style: italic;
  padding-top: 1.25rem;
}

/* ── RESEARCH / SCHOLARSHIP ─────────────────────────── */
#research { background: var(--cream); padding: 6rem 0; }
.papers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}
.paper-card {
  background: white;
  border: 1px solid var(--gray-light);
  border-top: 3px solid var(--navy);
  border-radius: 0 0 4px 4px;
  padding: 2rem;
  transition: box-shadow 0.2s;
}
.paper-card:hover { box-shadow: 0 8px 30px rgba(13,33,55,0.1); }
.paper-year {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.paper-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: 0.75rem;
}
.paper-journal {
  font-size: 0.8rem;
  color: var(--gray-mid);
  margin-bottom: 1.25rem;
  font-style: italic;
}
.paper-abstract {
  font-size: 0.85rem;
  line-height: 1.65;
  color: rgba(26,26,46,0.65);
  margin-bottom: 1.5rem;
}
.paper-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(30,142,201,0.3);
  padding-bottom: 1px;
  transition: border-color 0.2s;
}
.paper-link:hover { border-color: var(--cyan); }

.lowell-quote {
  background: var(--navy);
  color: var(--cream);
  padding: 3rem 4rem;
  border-radius: 4px;
  text-align: center;
  margin-top: 3rem;
}
.lowell-quote blockquote {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.2rem, 2vw, 1.75rem);
  font-style: italic;
  line-height: 1.5;
  margin-bottom: 1rem;
  color: var(--cream);
}
.lowell-quote cite {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gold-dim);
  text-transform: uppercase;
}

/* ── FOR INSTRUCTORS ────────────────────────────────── */
#instructors { background: var(--navy); padding: 6rem 0; }
.resources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(30,142,201,0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 3rem;
}
.resource-item {
  background: rgba(13,33,55,0.9);
  padding: 2rem 1.75rem;
  transition: background 0.2s;
}
.resource-item:hover { background: rgba(30,142,201,0.07); }
.resource-icon {
  width: 2rem; height: 2rem;
  margin-bottom: 1rem;
  color: var(--cyan);
}
.resource-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--cream);
  margin-bottom: 0.5rem;
}
.resource-body {
  font-size: 0.8rem;
  line-height: 1.6;
  color: rgba(240,232,200,0.5);
  margin-bottom: 1rem;
}
.resource-link {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan-light);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: gap 0.15s;
}
.resource-link:hover { gap: 0.6rem; }

/* ── ABOUT ──────────────────────────────────────────── */
#about { background: var(--navy-mid); padding: 6rem 0; }
.authors-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  margin-top: 3rem;
}
.author-card { display: flex; gap: 2rem; flex-direction: column; }
.author-photo {
  width: 120px; height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(30,142,201,0.4);
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  flex-shrink: 0;
}
.author-name {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.6rem;
  font-weight: 400;
  color: var(--cream);
  margin-bottom: 0.25rem;
}
.author-title {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.author-bio {
  font-size: 0.925rem;
  line-height: 1.75;
  color: rgba(240,232,200,0.7);
}
.author-contact {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--cyan-light);
  text-decoration: none;
  margin-top: 1.25rem;
  border-bottom: 1px solid rgba(30,142,201,0.3);
  padding-bottom: 2px;
}

/* ── NEWSLETTER / STAY CURRENT ──────────────────────── */
.newsletter-band {
  background: linear-gradient(135deg, var(--cyan) 0%, #1565A0 100%);
  padding: 3.5rem 0;
  text-align: center;
}
.newsletter-band h3 {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.newsletter-band p {
  font-size: 0.95rem;
  color: rgba(13,33,55,0.7);
  max-width: 500px;
  margin: 0 auto 1.75rem;
}
.newsletter-band .btn-primary {
  background: var(--navy);
  color: var(--cream);
}
.newsletter-band .btn-primary:hover { background: var(--navy-light); }

/* ── FOOTER ─────────────────────────────────────────── */
footer {
  background: var(--navy);
  border-top: 1px solid rgba(30,142,201,0.1);
  padding: 3rem 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: start;
  flex-wrap: wrap;
  gap: 2rem;
}
.footer-brand {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1rem;
  color: var(--cream);
  font-weight: 400;
  margin-bottom: 0.5rem;
}
.footer-sub {
  font-size: 0.75rem;
  color: rgba(240,232,200,0.4);
  line-height: 1.6;
  max-width: 280px;
}
.footer-links {
  display: flex;
  gap: 3rem;
}
.footer-col h4 {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  font-size: 0.82rem;
  color: rgba(240,232,200,0.55);
  text-decoration: none;
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--cyan-light); }
.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(30,142,201,0.08);
  font-size: 0.72rem;
  color: rgba(240,232,200,0.25);
  text-align: center;
}

/* ── ANIMATIONS ─────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up {
  animation: fadeUp 0.7s ease both;
}
.fade-up-1 { animation-delay: 0.1s; }
.fade-up-2 { animation-delay: 0.25s; }
.fade-up-3 { animation-delay: 0.4s; }
.fade-up-4 { animation-delay: 0.55s; }

/* ── RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 900px) {
  #hero { grid-template-columns: 1fr; padding: 8rem 0 4rem; }
  .hero-left { padding: 0 2rem; }
  .hero-right { padding: 3rem 2rem 0; }
  #problem .container { grid-template-columns: 1fr; gap: 3rem; }
  #problem .problem-right { padding-top: 0; }
  .glyco-grid { grid-template-columns: 1fr; }
  .approach-intro { grid-template-columns: 1fr; }
  .differentiators { grid-template-columns: 1fr 1fr; }
  .book-grid { grid-template-columns: 1fr; }
  .book-cover-col { position: static; max-width: 280px; }
  .features-grid { grid-template-columns: 1fr; }
  .papers-grid { grid-template-columns: 1fr; }
  .webinars-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .eval-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr 1fr; }
  .authors-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer-links { flex-direction: column; gap: 1.5rem; }
  nav { padding: 1rem 1.5rem; }
  nav ul { gap: 1.25rem; }
  .quote-band { padding: 3rem 2rem; }
  .container { padding: 0 1.5rem; }
}
@media (max-width: 600px) {
  .differentiators { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: 1fr; }
  nav ul { display: none; }
  .comparison-box { grid-template-columns: 1fr; }
}

/* ---------- INSTRUCTOR GUIDE SERIES ---------- */
.guides-band { background: var(--off-white); }
.guides-intro { font-size:1rem; line-height:1.8; color:rgba(26,26,46,0.72); max-width:680px; margin-bottom:2.5rem; }
.guide-featured {
  background:#fff; border:1px solid var(--gray-light); border-top:3px solid var(--gold);
  border-radius:0 0 4px 4px; padding:2rem; margin-bottom:3rem;
  display:grid; grid-template-columns:1fr auto; gap:2rem; align-items:center;
}
.guide-featured-title { font-family:'Cormorant Garamond',serif; font-size:1.6rem; font-weight:600; color:var(--navy); line-height:1.2; margin-bottom:0.5rem; }
.guide-featured-body { font-size:0.92rem; line-height:1.7; color:rgba(26,26,46,0.72); }
.guides-list { border-top:1px solid var(--gray-light); }
.guide-row {
  display:grid; grid-template-columns:1fr auto; gap:1.5rem; align-items:center;
  padding:1.15rem 0.25rem; border-bottom:1px solid var(--gray-light);
}
.guide-row:hover { background:rgba(255,255,255,0.6); }
.guide-label { font-size:0.62rem; font-weight:600; letter-spacing:0.15em; text-transform:uppercase; color:var(--cyan); margin-bottom:0.25rem; }
.guide-title { font-size:1rem; font-weight:500; color:var(--text-dark); line-height:1.35; }
.guide-pages { font-size:0.78rem; color:var(--gray-mid); margin-top:0.3rem; }
.guide-actions { display:flex; align-items:center; gap:1.1rem; white-space:nowrap; }
.guide-dl {
  display:inline-block; font-size:0.78rem; font-weight:600; letter-spacing:0.04em;
  color:#fff; background:var(--navy); padding:0.55rem 1.1rem; border-radius:3px;
  text-decoration:none; transition:background 0.2s;
}
.guide-dl:hover { background:var(--cyan); }
.guide-doi { font-size:0.72rem; color:var(--gray-mid); text-decoration:none; border-bottom:1px solid rgba(138,138,138,0.4); }
.guide-doi:hover { color:var(--navy); border-bottom-color:var(--navy); }
.guide-mirror { font-size:0.68rem; color:var(--gray-mid); text-decoration:underline; }
.guides-license {
  margin-top:2.5rem; padding:1.5rem; background:rgba(13,33,55,0.04);
  border-left:3px solid var(--navy); font-size:0.85rem; line-height:1.7; color:rgba(26,26,46,0.75);
}
@media (max-width:760px) {
  .guide-featured { grid-template-columns:1fr; gap:1.25rem; }
  .guide-row { grid-template-columns:1fr; gap:0.85rem; }
  .guide-actions { justify-content:flex-start; }
}

.guide-primer {
  display:grid; grid-template-columns:auto 1fr auto; gap:1.5rem; align-items:center;
  background:#fff; border:1px solid var(--gray-light); border-left:3px solid var(--cyan);
  padding:1.4rem 1.6rem; margin-bottom:2.5rem; border-radius:0 4px 4px 0;
}
.guide-primer-play {
  width:42px; height:42px; border-radius:50%; background:var(--cyan);
  display:flex; align-items:center; justify-content:center; color:#fff; font-size:0.9rem; flex-shrink:0;
}
.guide-primer-label { font-size:0.62rem; font-weight:600; letter-spacing:0.15em; text-transform:uppercase; color:var(--cyan); margin-bottom:0.3rem; }
.guide-primer-title { font-size:1rem; font-weight:600; color:var(--navy); margin-bottom:0.35rem; }
.guide-primer-body { font-size:0.88rem; line-height:1.65; color:rgba(26,26,46,0.72); }
@media (max-width:760px) {
  .guide-primer { grid-template-columns:1fr; gap:1rem; }
}

/* ---------- GUIDES PAGE ---------- */
.guide-side { display:flex; flex-direction:column; align-items:flex-end; gap:0.5rem; }
.guide-fallback { font-size:0.74rem; color:var(--gray-mid); line-height:1.5; text-align:right; max-width:230px; }
.guide-fallback a { color:var(--navy); }
.guide-dl.is-checking { opacity:0.65; pointer-events:none; }
.guides-hero { background:linear-gradient(135deg,#0a1a2e 0%,#0D2137 60%,#142A46 100%); padding:4.5rem 0 3.5rem; border-bottom:1px solid rgba(232,160,48,0.25); }
.guides-hero h1 { font-family:'Cormorant Garamond',serif; font-size:clamp(2.2rem,4vw,3.4rem); font-weight:300; color:var(--cream); line-height:1.1; margin-bottom:1rem; }
.guides-hero p { font-size:1.02rem; line-height:1.75; color:rgba(240,232,200,0.82); max-width:660px; }
.guides-stats { display:flex; gap:2.5rem; margin-top:2rem; flex-wrap:wrap; }
.guides-stat-n { font-family:'Cormorant Garamond',serif; font-size:2rem; color:var(--gold); line-height:1; }
.guides-stat-l { font-size:0.68rem; letter-spacing:0.14em; text-transform:uppercase; color:rgba(240,232,200,0.6); margin-top:0.35rem; }
.guides-back { display:inline-block; font-size:0.78rem; letter-spacing:0.05em; color:var(--cyan); text-decoration:none; margin-bottom:1.5rem; }
.guides-back:hover { color:var(--gold); }
.guides-why { background:#fff; border:1px solid var(--gray-light); border-left:3px solid var(--gold); padding:1.8rem 2rem; margin:3rem 0 0; }
.guides-why h3 { font-family:'Cormorant Garamond',serif; font-size:1.45rem; font-weight:600; color:var(--navy); margin-bottom:0.7rem; }
.guides-why p { font-size:0.92rem; line-height:1.75; color:rgba(26,26,46,0.75); margin-bottom:0.8rem; }
/* ---------- HOME PAGE PROMO ---------- */
.guides-promo { background:linear-gradient(135deg,#0a1a2e 0%,#0D2137 60%,#142A46 100%); border-top:1px solid rgba(232,160,48,0.25); border-bottom:1px solid rgba(232,160,48,0.25); }
.guides-promo-inner { display:grid; grid-template-columns:1fr auto; gap:3rem; align-items:center; }
.guides-promo h2 { font-family:'Cormorant Garamond',serif; font-size:clamp(1.9rem,3vw,2.7rem); font-weight:300; color:var(--cream); line-height:1.15; margin-bottom:1rem; }
.guides-promo p { font-size:1rem; line-height:1.75; color:rgba(240,232,200,0.82); max-width:620px; margin-bottom:1.5rem; }
.guides-promo-stats { display:flex; gap:2.25rem; flex-wrap:wrap; margin-bottom:1.8rem; }
.guides-promo-n { font-family:'Cormorant Garamond',serif; font-size:1.9rem; color:var(--gold); line-height:1; }
.guides-promo-l { font-size:0.64rem; letter-spacing:0.14em; text-transform:uppercase; color:rgba(240,232,200,0.6); margin-top:0.3rem; }
.guides-promo-cta {
  display:inline-flex; align-items:center; gap:0.5rem; background:var(--gold); color:var(--navy);
  font-size:0.86rem; font-weight:600; letter-spacing:0.03em; padding:0.9rem 1.8rem; border-radius:3px; text-decoration:none;
}
.guides-promo-cta:hover { background:var(--cream); }
@media (max-width:860px) {
  .guides-promo-inner { grid-template-columns:1fr; gap:1.5rem; }
  .guide-side { align-items:flex-start; }
  .guide-fallback { text-align:left; max-width:none; }
}

/* ---------- REVIEW COPY OFFER ---------- */
.dl-offer {
  margin-top:.75rem; padding:.9rem 1.1rem; background:#fff;
  border:1px solid var(--gray-light); border-left:3px solid var(--gold);
  border-radius:0 3px 3px 0; text-align:left; max-width:330px;
  font-size:.8rem; line-height:1.6; color:rgba(26,26,46,0.75);
}
.dl-offer strong { color:var(--navy); font-weight:600; }
.dl-offer a {
  display:inline-block; margin-top:.5rem; font-size:.74rem; font-weight:600;
  letter-spacing:.03em; color:var(--navy); text-decoration:none;
  border-bottom:1px solid var(--gold); padding-bottom:1px;
}
.dl-offer a:hover { color:var(--gold); }
.review-card {
  margin-top:2.5rem; background:#fff; border:1px solid var(--gray-light);
  border-top:3px solid var(--gold); border-radius:0 0 4px 4px; padding:2rem;
  display:grid; grid-template-columns:1fr auto; gap:2rem; align-items:center;
}
.review-card-title { font-family:'Cormorant Garamond',serif; font-size:1.5rem; font-weight:600; color:var(--navy); margin-bottom:.6rem; }
.review-card-body { font-size:.92rem; line-height:1.7; color:rgba(26,26,46,0.72); }
.review-cta {
  display:inline-block; background:var(--navy); color:#fff; text-decoration:none;
  font-size:.8rem; font-weight:600; letter-spacing:.03em; padding:.8rem 1.5rem;
  border-radius:3px; white-space:nowrap; transition:background .2s;
}
.review-cta:hover { background:var(--gold); color:var(--navy); }
@media (max-width:760px) {
  .review-card { grid-template-columns:1fr; gap:1.25rem; }
  .dl-offer { max-width:none; }
}