/* ============================================
   Francesco Federico — francescofederico.com
   Architectural Monograph Design System
   Definitive Edition
   ============================================ */

/* --- Fonts --- */
@font-face {
  font-family: 'Crimson Pro';
  src: url('../fonts/CrimsonPro-Variable.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
/* Italic variants omitted — browser synthesis handles the few italic uses */
@font-face {
  font-family: 'Inter';
  src: url('../fonts/Inter-Variable.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
/* Inter italic variant omitted — browser synthesis sufficient */

/* --- Design Tokens --- */
:root {
  --slate-blue: #4A5E7C;
  --cool-white: #F8F9FA;
  --charcoal: #2B2D30;
  --vermillion: #E63946;
  --steel-blue: #7D8E9E;
  --light-gray: #D8D9DA;
  --vermillion-hover: #CF3340;
  --slate-blue-hover: #3D4F6A;
  --font-headline: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --grid: 8px;
  --max-width: 1200px;
  --max-width-narrow: 760px;
  --max-width-wide: 1400px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--charcoal);
  background-color: var(--cool-white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--slate-blue); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--vermillion); }
ul { list-style: none; padding: 0; }

/* --- Typography --- */
h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.02em; }

h1 {
  font-family: var(--font-headline);
  font-weight: 700;
  color: var(--slate-blue);
  font-size: 3.5rem;
  margin-bottom: calc(var(--grid) * 3);
}
h2 {
  font-family: var(--font-headline);
  font-weight: 600;
  color: var(--slate-blue);
  font-size: 2.25rem;
  margin-bottom: calc(var(--grid) * 3);
}
h3 {
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--slate-blue);
  font-size: 1.125rem;
  letter-spacing: 0;
  margin-bottom: calc(var(--grid) * 2);
}
p {
  margin-bottom: calc(var(--grid) * 3);
  font-size: 1.0625rem;
  color: var(--charcoal);
}

/* --- Inline link animation --- */
.prose a {
  color: var(--slate-blue);
  text-decoration: none;
  background-image: linear-gradient(var(--vermillion), var(--vermillion));
  background-size: 0% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease, color 0.2s ease;
}
.prose a:hover {
  background-size: 100% 1px;
  color: var(--vermillion);
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--grid) * 5);
}
.container--narrow { max-width: var(--max-width-narrow); }
.container--wide { max-width: var(--max-width-wide); }
section { padding: calc(var(--grid) * 12) 0; }

/* =============================================
   ARCHITECTURAL ELEMENTS — Registration Marks
   ============================================= */

/* Corner registration marks — applied to hero sections */
.reg-marks {
  position: relative;
}
.reg-marks::before,
.reg-marks::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  pointer-events: none;
  z-index: 2;
}
/* Top-left L mark */
.reg-marks::before {
  top: calc(var(--grid) * 3);
  left: calc(var(--grid) * 3);
  border-top: 1px solid rgba(255,255,255,0.25);
  border-left: 1px solid rgba(255,255,255,0.25);
}
/* Bottom-right L mark */
.reg-marks::after {
  bottom: calc(var(--grid) * 3);
  right: calc(var(--grid) * 3);
  border-bottom: 1px solid rgba(255,255,255,0.25);
  border-right: 1px solid rgba(255,255,255,0.25);
}

/* Dark background variant */
.reg-marks--light::before {
  border-top-color: var(--light-gray);
  border-left-color: var(--light-gray);
}
.reg-marks--light::after {
  border-bottom-color: var(--light-gray);
  border-right-color: var(--light-gray);
}

/* Cross-hair at section transitions */
.crosshair {
  position: relative;
}
.crosshair::before {
  content: '+';
  position: absolute;
  top: -0.5em;
  left: calc(var(--grid) * 5);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  color: var(--light-gray);
  line-height: 1;
  letter-spacing: 0;
  z-index: 2;
}

/* Oversized background watermarks */
.watermark {
  position: relative;
  overflow: hidden;
}
.watermark::before {
  content: attr(data-watermark);
  position: absolute;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 22rem;
  line-height: 0.8;
  letter-spacing: -0.04em;
  color: var(--slate-blue);
  opacity: 0.035;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}
/* Positioning variants */
.watermark--top-right::before {
  top: -4rem;
  right: -3rem;
}
.watermark--top-left::before {
  top: -4rem;
  left: -3rem;
}
.watermark--center::before {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
}
.watermark--bottom-left::before {
  bottom: -6rem;
  left: -3rem;
}

/* White watermark for dark backgrounds */
.watermark--white::before {
  color: #ffffff;
  opacity: 0.04;
}

/* Section numbering */
.section-num {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vermillion);
  display: block;
  margin-bottom: calc(var(--grid) * 2);
}
.section-num--large {
  font-family: var(--font-headline);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--slate-blue);
  opacity: 0.08;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: calc(var(--grid) * -2);
}

/* Structural line — extends beyond container */
.struct-line {
  position: relative;
}
.struct-line::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: -100vw;
  right: -100vw;
  height: 1px;
  background: var(--light-gray);
}

/* =============================================
   HEADER / NAV
   ============================================= */
.site-header {
  background-color: var(--cool-white);
  padding: calc(var(--grid) * 2.5) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: calc(var(--grid) * 5);
  right: calc(var(--grid) * 5);
  height: 1px;
  background: var(--light-gray);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo img { height: 36px; width: auto; }
.site-nav {
  display: flex;
  gap: calc(var(--grid) * 5);
  align-items: center;
}
.site-nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.8125rem;
  color: var(--slate-blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  position: relative;
  padding-bottom: calc(var(--grid) * 1);
  transition: color 0.2s ease;
}
/* Active/hover: vermillion dot below, not underline */
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 4px;
  height: 4px;
  background: var(--vermillion);
  border-radius: 0;
  transform: translateX(-50%) scale(0);
  transition: transform 0.2s ease;
}
.site-nav a:hover::after,
.site-nav a.active::after {
  transform: translateX(-50%) scale(1);
}
.site-nav a:hover { color: var(--charcoal); }
.site-nav a.active { color: var(--charcoal); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--grid);
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--charcoal);
  margin: 5px 0;
  transition: 0.2s ease;
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  border-radius: 2px;
  padding: 12px 32px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  text-align: center;
  border: 2px solid transparent;
}
.btn--primary {
  background-color: var(--vermillion);
  color: var(--cool-white);
}
.btn--primary:hover {
  background-color: var(--vermillion-hover);
  color: var(--cool-white);
}
.btn--secondary {
  background-color: transparent;
  border-color: var(--slate-blue);
  color: var(--slate-blue);
}
.btn--secondary:hover {
  border-color: var(--slate-blue-hover);
  color: var(--slate-blue-hover);
}
.btn--white {
  background-color: transparent;
  border-color: rgba(255,255,255,0.5);
  color: var(--cool-white);
}
.btn--white:hover {
  background-color: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.8);
}
.btn--small {
  padding: 10px 24px;
  font-size: 0.8125rem;
}

/* =============================================
   HOME — HERO
   ============================================= */
.hero {
  background-color: var(--slate-blue);
  padding: calc(var(--grid) * 14) 0 calc(var(--grid) * 18);
  position: relative;
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: calc(var(--grid) * 8);
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero__image {
  position: relative;
  z-index: 1;
}
/* Architectural corner — two-sided border */
.hero__image::before {
  content: '';
  position: absolute;
  top: calc(var(--grid) * -2.5);
  left: calc(var(--grid) * -2.5);
  width: 64px;
  height: 64px;
  border-top: 2px solid rgba(255,255,255,0.25);
  border-left: 2px solid rgba(255,255,255,0.25);
  z-index: -1;
}
/* Bottom-right corner mark on image */
.hero__image::after {
  content: '';
  position: absolute;
  bottom: calc(var(--grid) * -2.5);
  right: calc(var(--grid) * -2.5);
  width: 64px;
  height: 64px;
  border-bottom: 2px solid rgba(255,255,255,0.25);
  border-right: 2px solid rgba(255,255,255,0.25);
  z-index: -1;
}
.hero__image img {
  border-radius: 2px;
  position: relative;
}
.hero__content {
  padding-bottom: 0;
}
.hero__content h1 {
  color: var(--cool-white);
  font-size: 5.5rem;
  letter-spacing: -0.04em;
  margin-bottom: calc(var(--grid) * 2);
  line-height: 0.95;
}
.hero__tagline {
  font-family: var(--font-headline);
  font-style: italic;
  font-weight: 400;
  font-size: 1.375rem;
  color: var(--cool-white);
  opacity: 0.7;
  margin-bottom: calc(var(--grid) * 6);
  line-height: 1.5;
}
/* Thin vermillion accent before buttons */
.hero__actions-wrap {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: calc(var(--grid) * 4);
}
.hero__actions {
  display: flex;
  gap: calc(var(--grid) * 2);
  flex-wrap: wrap;
  align-items: center;
}

/* Cross-hair detail in hero corner */
.hero__crosshair {
  position: absolute;
  top: calc(var(--grid) * 5);
  right: calc(var(--grid) * 5);
  width: 32px;
  height: 32px;
  z-index: 2;
}
.hero__crosshair::before,
.hero__crosshair::after {
  content: '';
  position: absolute;
  background: rgba(255,255,255,0.15);
}
.hero__crosshair::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}
.hero__crosshair::after {
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

/* Vermillion rule after hero */
.hero-rule {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--vermillion);
  border: none;
}

/* =============================================
   HOME — INTRO
   ============================================= */
.intro {
  padding: calc(var(--grid) * 16) 0 calc(var(--grid) * 12);
  position: relative;
}
/* Structural line below intro */
.intro::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: calc(var(--grid) * 5);
  right: calc(var(--grid) * 5);
  height: 1px;
  background: var(--light-gray);
}
.intro .container {
  max-width: 920px;
}
.intro__quote {
  font-family: var(--font-headline);
  font-style: italic;
  font-weight: 400;
  color: var(--slate-blue);
  font-size: 2.75rem;
  line-height: 1.2;
  margin-bottom: calc(var(--grid) * 6);
  letter-spacing: -0.015em;
  position: relative;
  padding-left: calc(var(--grid) * 4);
  border-left: 3px solid var(--vermillion);
}
.intro__body {
  max-width: 680px;
}
.intro__body p {
  font-size: 1.0625rem;
  line-height: 1.85;
}

/* =============================================
   HOME — CARDS
   ============================================= */
.cards-section {
  background-color: var(--slate-blue);
  padding: calc(var(--grid) * 14) 0;
  position: relative;
  overflow: hidden;
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--grid) * 4);
  position: relative;
  z-index: 1;
}
.card {
  padding: calc(var(--grid) * 5) calc(var(--grid) * 4) calc(var(--grid) * 5);
  background: rgba(255,255,255,0.04);
  position: relative;
  overflow: hidden;
  transition: background-color 0.3s ease;
}
.card:hover {
  background: rgba(255,255,255,0.08);
}
/* Animated vermillion top line */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--vermillion);
  transition: width 0.4s ease;
}
.card:hover::before {
  width: 100%;
}
/* Subtle bottom number watermark */
.card::after {
  content: attr(data-num);
  position: absolute;
  bottom: calc(var(--grid) * 2);
  right: calc(var(--grid) * 3);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 5rem;
  line-height: 1;
  color: rgba(255,255,255,0.04);
  pointer-events: none;
}
.card h3 {
  color: var(--cool-white);
  margin-bottom: calc(var(--grid) * 2);
}
.card p {
  color: var(--cool-white);
  opacity: 0.8;
  font-size: 0.9375rem;
  margin-bottom: calc(var(--grid) * 4);
}

/* =============================================
   PAGE HERO — Inner pages
   ============================================= */
.page-hero {
  background-color: var(--slate-blue);
  padding: calc(var(--grid) * 12) 0 calc(var(--grid) * 10);
  position: relative;
  overflow: hidden;
}
.page-hero h1 {
  color: var(--cool-white);
  font-size: 4rem;
  margin-bottom: calc(var(--grid) * 2);
  position: relative;
  z-index: 1;
}
.page-hero p {
  font-family: var(--font-headline);
  font-style: italic;
  font-weight: 400;
  color: var(--cool-white);
  opacity: 0.7;
  font-size: 1.25rem;
  max-width: 540px;
  position: relative;
  z-index: 1;
}
.page-hero .container {
  max-width: var(--max-width);
  position: relative;
  z-index: 1;
}
/* Vermillion accent line at bottom of page hero */
.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vermillion);
}

/* =============================================
   BOOK PAGE
   ============================================= */
.book-spread {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: calc(var(--grid) * 8);
  align-items: start;
}
.book-spread__cover {
  position: sticky;
  top: calc(var(--grid) * 12);
}
.book-spread__cover img {
  border: 1px solid var(--light-gray);
}
.book-spread__cover .btn {
  margin-top: calc(var(--grid) * 4);
  width: 100%;
}
.book-spread__content {
  position: relative;
}
.book-spread__content h2 {
  margin-top: calc(var(--grid) * 1);
}

.premise-lead {
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 2.25rem;
  color: var(--slate-blue);
  line-height: 1.25;
  margin-bottom: calc(var(--grid) * 4);
  letter-spacing: -0.01em;
}

/* Numbered section markers */
.book-marker {
  display: flex;
  align-items: center;
  gap: calc(var(--grid) * 3);
  margin: calc(var(--grid) * 8) 0 calc(var(--grid) * 4);
}
.book-marker__num {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--steel-blue);
}
.book-marker__line {
  flex: 1;
  height: 1px;
  background: var(--light-gray);
}

/* Framework lists */
.framework-list li {
  padding: calc(var(--grid) * 2.5) 0;
  border-bottom: 1px solid var(--light-gray);
  font-size: 1.0625rem;
  color: var(--charcoal);
}
.framework-list li:last-child { border-bottom: none; }
.framework-list strong { color: var(--slate-blue); }

.book-meta dt {
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--slate-blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: calc(var(--grid) * 3);
  margin-bottom: calc(var(--grid) * 0.5);
}
.book-meta dd {
  margin-bottom: calc(var(--grid) * 1);
  color: var(--charcoal);
  font-size: 1rem;
}

/* Case studies */
.case-studies {
  background-color: var(--slate-blue);
  padding: calc(var(--grid) * 12) 0;
  position: relative;
  overflow: hidden;
}
.case-studies h2 { color: var(--cool-white); }
.case-studies .subtitle {
  color: var(--cool-white);
  opacity: 0.8;
  max-width: 600px;
  margin-bottom: calc(var(--grid) * 6);
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--grid) * 4);
  position: relative;
  z-index: 1;
}
.case-card {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: calc(var(--grid) * 3);
  position: relative;
}
.case-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--vermillion);
  transition: width 0.3s ease;
}
.case-card:hover::before { width: 100%; }
.case-card h3 {
  color: var(--cool-white);
  margin-bottom: calc(var(--grid) * 1);
}
.case-card p {
  color: var(--cool-white);
  opacity: 0.8;
  font-size: 0.9375rem;
}

/* =============================================
   NEWSLETTER PAGE
   ============================================= */
.newsletter-header {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: calc(var(--grid) * 5);
  align-items: start;
  margin-bottom: calc(var(--grid) * 6);
  padding-bottom: calc(var(--grid) * 6);
  border-bottom: 1px solid var(--light-gray);
}
.newsletter-header img { width: 96px; height: 96px; }
.newsletter-header h2 { margin-bottom: calc(var(--grid) * 1); }
.newsletter-header p { margin-bottom: 0; }

.topic-list li {
  padding: calc(var(--grid) * 1.5) 0 calc(var(--grid) * 1.5) calc(var(--grid) * 3);
  border-bottom: 1px solid var(--light-gray);
  font-size: 1.0625rem;
  position: relative;
  color: var(--charcoal);
}
.topic-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--vermillion);
  transform: translateY(-50%);
}
.topic-list li:last-child { border-bottom: none; }

.edition-list li {
  padding: calc(var(--grid) * 3) 0;
  border-bottom: 1px solid var(--light-gray);
}
.edition-list li:last-child { border-bottom: none; }
.edition-list strong {
  display: block;
  color: var(--slate-blue);
  font-size: 1.0625rem;
  margin-bottom: calc(var(--grid) * 0.5);
}
.edition-list p {
  font-size: 0.9375rem;
  margin-bottom: 0;
  opacity: 0.85;
}

.subscribe-row {
  display: flex;
  gap: calc(var(--grid) * 2);
  flex-wrap: wrap;
}

/* =============================================
   MEDIA & SPEAKING PAGE
   ============================================= */
.section-label {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vermillion);
  margin-bottom: calc(var(--grid) * 1.5);
}

.media-item {
  padding: calc(var(--grid) * 3.5) 0;
  border-bottom: 1px solid var(--light-gray);
  position: relative;
}
.media-item:last-child { border-bottom: none; }
.media-item .meta {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--steel-blue);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: calc(var(--grid) * 0.5);
}
.media-item h3 {
  margin-bottom: calc(var(--grid) * 0.5);
  font-size: 1.0625rem;
}
.media-item p {
  font-size: 0.9375rem;
  margin-bottom: 0;
  opacity: 0.85;
}
.media-item a {
  background-image: linear-gradient(var(--vermillion), var(--vermillion));
  background-size: 0% 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease, color 0.2s ease;
}
.media-item a:hover {
  background-size: 100% 1px;
  color: var(--vermillion);
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: calc(var(--grid) * 8);
  align-items: start;
}
.about-photo-wrap {
  position: sticky;
  top: calc(var(--grid) * 12);
  position: relative;
}
/* Corner marks — matching hero treatment */
.about-photo-wrap::before {
  content: '';
  position: absolute;
  top: calc(var(--grid) * -2.5);
  left: calc(var(--grid) * -2.5);
  width: 48px;
  height: 48px;
  border-top: 2px solid var(--slate-blue);
  border-left: 2px solid var(--slate-blue);
  z-index: -1;
}
.about-photo-wrap::after {
  content: '';
  position: absolute;
  bottom: calc(var(--grid) * -2.5);
  right: calc(var(--grid) * -2.5);
  width: 48px;
  height: 48px;
  border-bottom: 2px solid var(--slate-blue);
  border-right: 2px solid var(--slate-blue);
  z-index: -1;
}
.about-photo {
  border-radius: 2px;
  position: relative;
}

.career-item {
  padding: calc(var(--grid) * 3) 0;
  border-bottom: 1px solid var(--light-gray);
}
.career-item:last-child { border-bottom: none; }
.career-item .role {
  font-weight: 600;
  color: var(--slate-blue);
  font-size: 1.0625rem;
  margin-bottom: 0;
}
.career-item .org {
  font-weight: 500;
  font-size: 1rem;
  margin-bottom: 0;
}
.career-item .dates {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--steel-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: calc(var(--grid) * 1);
}
.career-item p { margin-bottom: 0; }

.logo-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: calc(var(--grid) * 10);
  padding: calc(var(--grid) * 4) 0;
  flex-wrap: wrap;
}
.logo-row img {
  height: 36px;
  width: auto;
  filter: grayscale(100%);
  opacity: 0.35;
  transition: opacity 0.3s ease;
}
.logo-row img:hover { opacity: 0.7; }

/* =============================================
   404 PAGE
   ============================================= */
.error-page {
  text-align: center;
  padding: calc(var(--grid) * 24) 0;
  position: relative;
  overflow: hidden;
}
.error-page__ghost {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 18rem;
  color: var(--slate-blue);
  opacity: 0.05;
  line-height: 1;
  letter-spacing: -0.04em;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  pointer-events: none;
  user-select: none;
}
.error-page h2 {
  font-size: 1.75rem;
  margin-bottom: calc(var(--grid) * 2);
  position: relative;
}
.error-page p {
  position: relative;
  margin-bottom: calc(var(--grid) * 5);
}
.error-page .btn { position: relative; }

/* =============================================
   PULL QUOTE — breaks out of container
   ============================================= */
.pull-quote {
  font-family: var(--font-headline);
  font-style: italic;
  font-weight: 400;
  font-size: 2rem;
  color: var(--slate-blue);
  line-height: 1.3;
  letter-spacing: -0.01em;
  padding: calc(var(--grid) * 6) 0;
  margin: calc(var(--grid) * 4) 0;
  position: relative;
}
.pull-quote::before {
  content: '';
  position: absolute;
  left: 0;
  top: calc(var(--grid) * 6);
  width: 3px;
  height: calc(100% - calc(var(--grid) * 12));
  background: var(--vermillion);
}

/* =============================================
   DIVIDERS & STRUCTURAL ELEMENTS
   ============================================= */
.divider {
  width: 48px;
  height: 2px;
  background-color: var(--vermillion);
  margin: calc(var(--grid) * 6) 0;
}

/* =============================================
   FOOTER — Elevated, architectural
   ============================================= */
.site-footer {
  background-color: var(--slate-blue);
  padding: 0;
  position: relative;
}
/* Vermillion rule at top */
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vermillion);
}
.footer__inner {
  padding: calc(var(--grid) * 8) 0 calc(var(--grid) * 6);
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}
.footer__logo {
  display: block;
  margin: 0 auto calc(var(--grid) * 4);
}
.footer__logo img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.7;
  margin: 0 auto;
}
.footer-links {
  display: flex;
  gap: calc(var(--grid) * 4);
  justify-content: center;
  margin-bottom: calc(var(--grid) * 3);
}
.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
  transition: color 0.2s ease;
}
.footer-links a:hover { color: var(--cool-white); }
.footer__copy {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  margin-bottom: 0;
}

/* =============================================
   BACKGROUND TEXTURE — subtle CSS dot grid
   ============================================= */
.textured {
  background-image: radial-gradient(circle, var(--light-gray) 0.5px, transparent 0.5px);
  background-size: 24px 24px;
  background-color: var(--cool-white);
}

/* =============================================
   NEWSLETTER — Featured edition highlight
   ============================================= */
.edition-featured {
  background: var(--cool-white);
  border-left: 3px solid var(--vermillion);
  padding: calc(var(--grid) * 3) calc(var(--grid) * 4);
  margin: calc(var(--grid) * 2) 0;
}
.edition-featured strong {
  font-size: 1.125rem;
}

/* Edition grid — 2-column layout for visual variety */
.editions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--grid) * 3) calc(var(--grid) * 5);
}
.editions-grid li {
  padding: calc(var(--grid) * 3) 0;
  border-bottom: 1px solid var(--light-gray);
}
.editions-grid li:nth-last-child(-n+2) { border-bottom: none; }
.editions-grid strong {
  display: block;
  color: var(--slate-blue);
  font-size: 1rem;
  margin-bottom: calc(var(--grid) * 0.5);
}
.editions-grid p {
  font-size: 0.9375rem;
  margin-bottom: 0;
  opacity: 0.85;
}

/* =============================================
   MEDIA — Alternating highlight cards
   ============================================= */
.media-highlight {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--grid) * 3);
  margin-bottom: calc(var(--grid) * 4);
}
.media-highlight__card {
  padding: calc(var(--grid) * 4);
  border-top: 2px solid var(--vermillion);
  background: #EEF0F3;
  transition: background-color 0.2s ease;
}
.media-highlight__card:hover {
  background: #E4E7EB;
}
.media-highlight__card .meta {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--steel-blue);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: calc(var(--grid) * 1);
}
.media-highlight__card h3 {
  font-size: 1.0625rem;
  margin-bottom: calc(var(--grid) * 1);
}
.media-highlight__card p {
  font-size: 0.875rem;
  margin-bottom: 0;
  opacity: 0.85;
}

/* Speaking CTA section — full width slate blue */
.speaking-cta {
  background-color: var(--slate-blue);
  padding: calc(var(--grid) * 10) 0;
  text-align: center;
}
.speaking-cta h2 { color: var(--cool-white); }
.speaking-cta p { color: var(--cool-white); opacity: 0.85; max-width: 560px; margin: 0 auto calc(var(--grid) * 4); }

/* =============================================
   BOOK — Cover breakout
   ============================================= */
.book-spread__cover--breakout {
  position: sticky;
  top: calc(var(--grid) * 10);
}
.book-spread__cover--breakout img {
  border: 1px solid var(--light-gray);
}

/* =============================================
   LINK-IN-BIO HOMEPAGE
   ============================================= */
.linkinbio {
  background-color: var(--cool-white);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--grid) * 6) calc(var(--grid) * 3);
}
.bio__card {
  max-width: 440px;
  width: 100%;
  text-align: center;
}
/* Photo with architectural corner marks */
.bio__photo-wrap {
  position: relative;
  width: 130px;
  height: 130px;
  margin: 0 auto calc(var(--grid) * 4);
}
.bio__photo-wrap::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -8px;
  width: 32px;
  height: 32px;
  border-top: 1px solid var(--slate-blue);
  border-left: 1px solid var(--slate-blue);
  opacity: 0.25;
}
.bio__photo-wrap::after {
  content: '';
  position: absolute;
  bottom: -8px;
  right: -8px;
  width: 32px;
  height: 32px;
  border-bottom: 1px solid var(--slate-blue);
  border-right: 1px solid var(--slate-blue);
  opacity: 0.25;
}
.bio__photo {
  width: 130px;
  height: 130px;
  border-radius: 2px;
  object-fit: cover;
}
.bio__name {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 2.5rem;
  color: var(--slate-blue);
  letter-spacing: -0.03em;
  margin-bottom: calc(var(--grid) * 1);
  line-height: 1.05;
}
.bio__tagline {
  font-family: var(--font-headline);
  font-style: italic;
  font-weight: 400;
  font-size: 1.0625rem;
  color: var(--steel-blue);
  margin-bottom: calc(var(--grid) * 5);
}
/* Thin vermillion rule between tagline and links */
.bio__links {
  display: flex;
  flex-direction: column;
  gap: calc(var(--grid) * 1.5);
  margin-bottom: calc(var(--grid) * 6);
  padding-top: calc(var(--grid) * 5);
  border-top: 2px solid var(--vermillion);
}
.bio__link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--grid) * 2) calc(var(--grid) * 3);
  border: 1px solid var(--light-gray);
  border-radius: 2px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--charcoal);
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.bio__link:hover {
  border-color: var(--slate-blue);
  background-color: rgba(74, 94, 124, 0.04);
  color: var(--charcoal);
}
.bio__link--accent {
  border-color: var(--vermillion);
  background-color: var(--vermillion);
  color: var(--cool-white);
  font-weight: 600;
}
.bio__link--accent:hover {
  background-color: var(--vermillion-hover);
  border-color: var(--vermillion-hover);
  color: var(--cool-white);
}
.bio__link-arrow {
  font-size: 1rem;
  opacity: 0.35;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.bio__link:hover .bio__link-arrow {
  opacity: 0.8;
  transform: translateX(2px);
}
.bio__link--accent .bio__link-arrow { opacity: 0.7; }
.bio__link--accent:hover .bio__link-arrow { opacity: 1; }

/* Newsletter link group — one label, two platform options */
.bio__link-group {
  border: 1px solid var(--light-gray);
  border-radius: 2px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.bio__link-group:hover {
  border-color: var(--slate-blue);
}
.bio__link-group-label {
  display: block;
  padding: calc(var(--grid) * 1.5) calc(var(--grid) * 3) calc(var(--grid) * 1);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--charcoal);
  text-align: center;
}
.bio__link-group-options {
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 0 calc(var(--grid) * 3) calc(var(--grid) * 2);
}
.bio__link-option {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--steel-blue);
  text-decoration: none;
  padding: calc(var(--grid) * 0.5) 0;
  transition: color 0.2s ease;
  position: relative;
}
.bio__link-option:hover {
  color: var(--vermillion);
}
/* Separator dot between options */
.bio__link-option + .bio__link-option {
  margin-left: calc(var(--grid) * 3);
  padding-left: calc(var(--grid) * 3);
}
.bio__link-option + .bio__link-option::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 3px;
  background: var(--light-gray);
  transform: translateY(-50%);
}

.bio__footer {
  display: flex;
  justify-content: center;
  gap: calc(var(--grid) * 3);
  margin-bottom: calc(var(--grid) * 3);
}
.bio__footer a {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--light-gray);
  text-decoration: none;
  transition: color 0.2s ease;
}
.bio__footer a:hover { color: var(--steel-blue); }
.bio__copy {
  font-size: 0.6875rem;
  color: var(--light-gray);
  margin-bottom: 0;
}

/* SEO content section on homepage */
.bio__seo {
  max-width: 440px;
  width: 100%;
  margin-top: calc(var(--grid) * 6);
  text-align: center;
}
.bio__seo p {
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--steel-blue);
  margin-bottom: 0;
}

/* =============================================
   SUBPAGE NAV — Minimal back-link
   ============================================= */
.subpage-header {
  padding: calc(var(--grid) * 2.5) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--cool-white);
}
.subpage-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: calc(var(--grid) * 5);
  right: calc(var(--grid) * 5);
  height: 1px;
  background: var(--light-gray);
}
.subpage-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.subpage-header__back {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--steel-blue);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.2s ease;
}
.subpage-header__back:hover { color: var(--slate-blue); }
.subpage-header__nav {
  display: flex;
  gap: calc(var(--grid) * 4);
}
.subpage-header__nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.75rem;
  color: var(--steel-blue);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.2s ease;
}
.subpage-header__nav a:hover { color: var(--slate-blue); }
.subpage-header__nav a.active { color: var(--charcoal); }

@media (max-width: 768px) {
  .subpage-header::after {
    left: calc(var(--grid) * 3);
    right: calc(var(--grid) * 3);
  }
  .subpage-header__nav { display: none; }
}

/* =============================================
   UTILITY
   ============================================= */
.text-center { text-align: center; }
.mt-2 { margin-top: calc(var(--grid) * 2); }
.mt-4 { margin-top: calc(var(--grid) * 4); }
.mt-6 { margin-top: calc(var(--grid) * 6); }
.mt-8 { margin-top: calc(var(--grid) * 8); }
.mb-4 { margin-bottom: calc(var(--grid) * 4); }
.mb-6 { margin-bottom: calc(var(--grid) * 6); }

/* Single-column stacked media highlights */
.media-highlight--stacked {
  grid-template-columns: 1fr;
}

/* Single-column editions grid */
.editions-grid--single {
  grid-template-columns: 1fr;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: calc(var(--grid) * 6);
    text-align: center;
  }
  .hero__image {
    max-width: 280px;
    margin: 0 auto;
  }
  .hero__image::before { display: none; }
  .hero__content { padding-left: 0; }
  .hero__content h1 { font-size: 3.5rem; }
  .hero__actions { justify-content: center; }
  .hero__crosshair { display: none; }

  .intro .container {
    grid-template-columns: 1fr;
  }
  .intro__body { grid-column: 1; }

  .book-spread {
    grid-template-columns: 1fr;
  }
  .book-spread__cover {
    max-width: 300px;
    position: static;
  }
  .about-layout { grid-template-columns: 1fr; }
  .about-photo-wrap {
    max-width: 220px;
    position: static;
  }
  .about-photo-wrap::before,
  .about-photo-wrap::after { display: none; }
  .hero__image::after { display: none; }
  .book-spread__cover--breakout { margin-left: 0; padding-right: 0; }
  .media-highlight { grid-template-columns: 1fr; }
  .editions-grid { grid-template-columns: 1fr; }

  .pull-quote { margin: calc(var(--grid) * 4) 0; }

  .watermark::before { font-size: 14rem; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  .page-hero h1 { font-size: 2.75rem; }
  section { padding: calc(var(--grid) * 8) 0; }
  .container { padding: 0 calc(var(--grid) * 3); }

  .site-header::after {
    left: calc(var(--grid) * 3);
    right: calc(var(--grid) * 3);
  }

  .site-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--cool-white);
    border-bottom: 1px solid var(--light-gray);
    padding: calc(var(--grid) * 3) calc(var(--grid) * 4);
    gap: calc(var(--grid) * 2.5);
  }
  .site-nav.is-open { display: flex; }
  .nav-toggle { display: block; }
  .site-nav a::after { display: none; }

  .cards-grid,
  .case-grid { grid-template-columns: 1fr; }

  .hero { padding: calc(var(--grid) * 10) 0 calc(var(--grid) * 12); }
  .hero__image { max-width: 260px; margin: 0 auto; }
  .hero__content h1 { font-size: 3rem; }
  .hero__actions { flex-direction: column; align-items: center; }

  .intro__quote { font-size: 1.75rem; }

  .card { padding: calc(var(--grid) * 4) calc(var(--grid) * 3); }

  .newsletter-header { grid-template-columns: 72px 1fr; gap: calc(var(--grid) * 3); }
  .newsletter-header img { width: 72px; height: 72px; }

  .premise-lead { font-size: 1.5rem; }

  .error-page__ghost { font-size: 10rem; }

  .watermark::before { font-size: 10rem; }

  .reg-marks::before,
  .reg-marks::after { display: none; }
}

@media (max-width: 480px) {
  .hero__content h1 { font-size: 2.5rem; }
  .page-hero h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .intro__quote { font-size: 1.5rem; padding-left: calc(var(--grid) * 3); }
  .intro__body { padding-left: calc(var(--grid) * 3); }
  .logo-row { gap: calc(var(--grid) * 5); }
  .logo-row img { height: 28px; }
  .subscribe-row { flex-direction: column; }
  .error-page__ghost { font-size: 7rem; }
  .watermark::before { font-size: 7rem; }
}