/* ── DESIGN SYSTEM VARIABLES ── */
:root {
  --forest: #1a3c2a;
  --moss: #2e6b45;
  --sage: #5a8a6a;
  --cream: #f7f4ee;
  --parchment: #ede8dc;
  --ink: #1a1a18;
  --muted: #5c5c52;
  --border: #d4cfc4;
  
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Instrument Sans', sans-serif;
  
  --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --space-unit: 1rem;
}

/* ── RESET & BASE RULES ── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background-color: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 0;
}

.text-center { text-align: center; }

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.25;
}

p { margin-bottom: 1.5rem; color: var(--muted); }
a { text-decoration: none; color: inherit; transition: var(--transition-smooth); }

/* Global components */
.section-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sage);
  display: block;
  margin-bottom: 1rem;
  font-weight: 500;
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  color: var(--forest);
  margin-bottom: 1.5rem;
}

.section-desc {
  max-width: 650px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
  color: var(--muted);
}

.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--forest);
  color: var(--cream);
}
.btn-primary:hover {
  background-color: var(--moss);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--forest);
  border-color: var(--forest);
}
.btn-secondary:hover {
  background-color: var(--forest);
  color: var(--cream);
  transform: translateY(-2px);
}

/* ── HEADER / NAVIGATION ── */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 1000;
  background-color: rgba(247, 244, 238, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1.5px solid var(--border);
  transition: var(--transition-smooth);
}

.header-container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--forest);
  letter-spacing: -0.01em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.main-nav a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.main-nav a:hover { color: var(--forest); }

.main-nav .nav-cta {
  background-color: var(--forest);
  color: var(--cream);
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
}
.main-nav .nav-cta:hover { background-color: var(--moss); }

.mobile-nav-toggle {
  display: none;
  background: none; border: none;
  width: 24px; height: 18px;
  flex-direction: column; justify-content: space-between;
  cursor: pointer;
}
.mobile-nav-toggle span {
  display: block; width: 100%; height: 2px;
  background-color: var(--forest);
  transition: var(--transition-smooth);
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 80px; left: 0; width: 100%; height: 0;
  background-color: var(--cream);
  z-index: 999;
  overflow: hidden;
  transition: var(--transition-smooth);
  border-bottom: 1.5px solid var(--border);
}
.mobile-nav-drawer.open { height: calc(100vh - 80px); }
.mobile-nav {
  display: flex; flex-direction: column;
  align-items: center; gap: 2rem;
  padding: 3rem 0;
}
.mobile-nav a { font-size: 1.2rem; text-transform: uppercase; }

/* ── HERO SECTION ── */
.hero-section {
  padding-top: 140px;
  min-height: 90vh;
  display: flex; align-items: center;
  border-bottom: 1.5px solid var(--border);
}
.hero-container {
  display: flex; flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  max-width: 900px;
}
.hero-title {
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 1.05;
  color: var(--forest);
  margin-bottom: 1.5rem;
}
.hero-title em { font-style: italic; font-weight: 400; color: var(--sage); }
.hero-subhead {
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  font-family: var(--font-heading);
  line-height: 1.6;
  color: var(--muted);
  max-width: 750px;
  margin-bottom: 2.5rem;
}
.hero-ctas { display: flex; gap: 1.25rem; }

/* ── THESIS SECTION ── */
.thesis-section {
  background-color: var(--cream);
  border-bottom: 1.5px solid var(--border);
}
.pullquote {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  line-height: 1.4;
  color: var(--forest);
  text-align: center;
  max-width: 850px;
  margin: 0 auto 4rem;
  font-style: italic;
}
.thesis-content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.thesis-text p { font-size: 1.2rem; line-height: 1.8; }

/* Comparison Toggles & Panels */
.comparison-card {
  background: var(--parchment);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
}
.comparison-toggle-header {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}
.toggle-label {
  font-size: 0.75rem; letter-spacing: 0.1em;
  text-transform: uppercase; font-weight: 600;
  color: var(--muted);
  transition: var(--transition-smooth);
}
.toggle-label.active { color: var(--forest); }
.comparison-switch {
  width: 48px; height: 26px;
  background-color: var(--forest);
  border-radius: 99px; border: none;
  position: relative; cursor: pointer;
  outline: none;
}
.comparison-switch::before {
  content: ''; position: absolute;
  top: 3px; left: 3px; width: 20px; height: 20px;
  background-color: var(--cream);
  border-radius: 50%;
  transition: var(--transition-smooth);
}
.comparison-card.collective .comparison-switch::before { left: 25px; }

.worldview-panel { display: none; }
.worldview-panel.active { display: block; animation: fadeIn 0.4s ease; }

.wv-block { margin-bottom: 1.5rem; }
.wv-block:last-child { margin-bottom: 0; }
.wv-block-label {
  font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.05em; font-weight: 600;
  color: var(--sage); display: block; margin-bottom: 0.25rem;
}
.wv-block-text { font-size: 0.95rem; color: var(--muted); }

.wv-block.highlights {
  background-color: var(--cream);
  border: 1.5px solid var(--forest);
  border-radius: 8px;
  padding: 1.5rem;
}
.highlight { color: var(--forest); font-weight: 500; font-size: 0.85rem; }
.highlight-text { font-family: var(--font-heading); font-size: 1.15rem; color: var(--ink); line-height: 1.6; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ── ABOUT CASSANDRA SECTION ── */
.about-section {
  background-color: var(--parchment);
  border-bottom: 1.5px solid var(--border);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 5rem;
  align-items: center;
}
.about-image-wrapper {
  justify-self: center;
  position: relative;
}
.about-image-wrapper::before {
  content: '';
  position: absolute;
  top: 15px; left: 15px;
  width: 100%; height: 100%;
  border: 1.5px solid var(--forest);
  border-radius: 8px;
  z-index: 1;
}
.about-portrait {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 380px;
  height: 480px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 10px 10px 30px rgba(26,60,42,0.05);
}
.about-text-content {
  padding-left: 1rem;
}
.about-text-content p {
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}
.about-text-content .btn {
  margin-top: 1rem;
}

/* ── ECOSYSTEM SECTION ── */
.ecosystem-section {
  border-bottom: 1.5px solid var(--border);
}
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.ecosystem-card {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3rem 2.5rem;
  display: flex; flex-direction: column;
  transition: var(--transition-smooth);
}
.ecosystem-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(26,60,42,0.05);
}
.card-num {
  font-size: 0.75rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--sage);
  margin-bottom: 1.5rem;
}
.card-title {
  font-size: 1.6rem; color: var(--forest);
  margin-bottom: 1rem;
}
.card-desc { font-size: 0.95rem; flex-grow: 1; margin-bottom: 2rem; }
.card-link {
  font-size: 0.85rem; text-transform: uppercase;
  font-weight: 600; color: var(--forest);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px; align-self: flex-start;
}
.card-link:hover { border-bottom-color: var(--forest); }

/* ── NEWSLETTER SIGNUP ── */
.newsletter-signup-section {
  background-color: var(--parchment);
  border-bottom: 1.5px solid var(--border);
}
.newsletter-desc { max-width: 600px; margin: 0 auto 2.5rem; font-size: 1.2rem; }
.signup-form {
  max-width: 500px; margin: 0 auto 1.5rem;
  display: flex; gap: 0.5rem;
}
.signup-form input {
  flex-grow: 1; padding: 0.85rem 1.5rem;
  border-radius: 99px; border: 1.5px solid var(--border);
  background-color: var(--cream);
  font-family: var(--font-body); font-size: 0.95rem;
  color: var(--ink); outline: none;
}
.signup-form input:focus { border-color: var(--forest); }
.form-disclaimer { font-size: 0.75rem; color: var(--sage); }

/* ── SPEAKING SECTION ── */
.speaking-section {
  border-bottom: 1.5px solid var(--border);
}
.speaking-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 4rem;
}
.speaking-card {
  background-color: var(--cream);
  border-left: 3px solid var(--sage);
  padding: 2.5rem;
}
.topic-title { font-size: 1.6rem; color: var(--forest); margin-bottom: 0.5rem; }
.topic-meta {
  font-size: 0.7rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--muted);
  display: block; margin-bottom: 1.5rem;
}
.topic-desc { font-size: 0.95rem; line-height: 1.6; }

.speaking-cta-box {
  background-color: var(--parchment);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3rem;
  max-width: 800px;
  margin: 0 auto;
}
.speaking-cta-box p { font-family: var(--font-heading); font-size: 1.25rem; margin-bottom: 1.5rem; color: var(--forest); }

/* ── FRAMEWORKS SECTION ── */
.frameworks-section {
  border-bottom: 1.5px solid var(--border);
}
.frameworks-list { display: flex; flex-direction: column; gap: 6rem; }
.framework-item {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 5rem;
  align-items: center;
}
.framework-item.reverse {
  grid-template-columns: 1fr 1.2fr;
}
.framework-item.reverse .framework-info { order: 2; }
.framework-item.reverse .framework-book-cover { order: 1; }

.framework-tag {
  font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--sage);
  display: block; margin-bottom: 0.75rem;
}
.framework-name { font-size: 2.5rem; color: var(--forest); margin-bottom: 0.25rem; }
.framework-timeline { font-size: 0.85rem; font-style: italic; color: var(--muted); margin-bottom: 1.5rem; }
.framework-desc { font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem; }
.framework-quote {
  display: block; font-family: var(--font-heading);
  font-size: 1.35rem; font-style: italic; color: var(--forest);
  border-left: 2.5px solid var(--moss); padding-left: 1.25rem;
  margin-bottom: 2rem;
}
.framework-cta {
  font-size: 0.85rem; text-transform: uppercase;
  font-weight: 600; color: var(--forest);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px; display: inline-block;
}
.framework-cta:hover { border-bottom-color: var(--forest); }

/* Layers List inside Container CF */
.framework-layers-list { margin-bottom: 2rem; }
.framework-layers-list span {
  display: block; font-size: 0.95rem; margin-bottom: 0.5rem;
}

/* Mock Books styling */
.framework-book-cover {
  height: 380px; width: 280px;
  background: var(--ink);
  color: var(--cream);
  border-radius: 4px 12px 12px 4px;
  box-shadow: 12px 12px 30px rgba(0,0,0,0.15), inset 4px 0 10px rgba(255,255,255,0.05);
  display: flex; align-items: center; justify-content: center;
  padding: 2.5rem; position: relative;
  overflow: hidden;
  justify-self: center;
}
.framework-book-cover::after {
  content: ''; position: absolute;
  top: 0; left: 0; width: 14px; height: 100%;
  background: linear-gradient(90deg, rgba(0,0,0,0.2) 0%, rgba(255,255,255,0.08) 50%, rgba(0,0,0,0.1) 100%);
  border-right: 1px solid rgba(0,0,0,0.3);
}
.cover-design {
  border: 1px solid rgba(247,244,238,0.2);
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  justify-content: space-between; align-items: center;
  padding: 2rem 1rem; text-align: center;
}
.cover-author { font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase; }
.cover-title { font-family: var(--font-heading); font-size: 2.2rem; }
.cover-sub { font-size: 0.75rem; font-style: italic; color: rgba(247,244,238,0.6); }

.mock-finite { background: #1c2e24; }
.mock-restore { background: #2f251c; }

/* Concentric Rings Diagram */
.framework-diagram {
  justify-self: center;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  width: 320px; height: 320px;
}
.diagram-circle {
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.05em; font-weight: 600;
  position: absolute;
  transition: var(--transition-smooth);
}
.diagram-circle span { position: absolute; top: 12px; }

.layer-foundation { width: 320px; height: 320px; background-color: rgba(26,60,42,0.06); border: 1px solid rgba(26,60,42,0.15); color: var(--forest); }
.layer-design { width: 240px; height: 240px; background-color: rgba(26,60,42,0.1); border: 1px solid rgba(26,60,42,0.2); }
.layer-hold { width: 160px; height: 160px; background-color: rgba(26,60,42,0.15); border: 1px solid rgba(26,60,42,0.25); }
.layer-expand { width: 80px; height: 80px; background-color: var(--forest); color: var(--cream); border: none; font-size: 0.65rem; }
.layer-expand span { top: 50%; transform: translateY(-50%); }

/* ── PRESS SECTION ── */
.press-section {
  background-color: var(--cream);
  border-bottom: 1.5px solid var(--border);
}
.press-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}
.press-header { font-size: 1.8rem; color: var(--forest); margin-bottom: 2rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border); }
.press-list { list-style: none; }
.press-list li { margin-bottom: 1.5rem; }
.press-list li strong { display: block; font-family: var(--font-heading); font-size: 1.15rem; font-weight: 500; color: var(--forest); margin-bottom: 0.25rem; }
.press-list li span { font-size: 0.95rem; color: var(--muted); }

/* ── FOOTER ── */
.site-footer {
  background-color: var(--ink);
  color: var(--cream);
  padding: 4rem 0;
}
.footer-container {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 2rem;
  padding: 0;
}
.footer-brand .footer-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  display: block; margin-bottom: 0.5rem;
}
.footer-brand p { color: rgba(247,244,238,0.6); font-size: 0.85rem; margin-bottom: 0; }
.footer-links { display: flex; gap: 2rem; }
.footer-links a {
  font-size: 0.85rem; text-transform: uppercase;
  letter-spacing: 0.1em; color: rgba(247,244,238,0.6);
}
.footer-links a:hover { color: var(--cream); }
.copyright {
  width: 100%; text-align: center;
  font-size: 0.75rem; color: rgba(247,244,238,0.4);
  margin-top: 3rem; border-top: 1px solid rgba(247,244,238,0.1);
  padding-top: 2rem;
}

/* ── EXIT POPUP ── */
.exit-popup {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background-color: rgba(26,60,42,0.4);
  backdrop-filter: blur(8px);
  z-index: 10000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.5s ease;
}
.exit-popup.show { opacity: 1; pointer-events: auto; }
.exit-popup-content {
  background-color: var(--cream);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem;
  max-width: 500px;
  width: 90%;
  position: relative;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0,0,0,0.15);
}
.exit-popup-close {
  position: absolute; top: 1.5rem; right: 1.5rem;
  background: none; border: none;
  font-size: 1.5rem; color: var(--muted); cursor: pointer;
}
.exit-popup-content h2 { font-size: 2rem; color: var(--forest); margin-bottom: 1rem; }
.exit-popup-content p { font-size: 0.95rem; margin-bottom: 2rem; }
.exit-popup-content .btn { width: 100%; margin-bottom: 1rem; }
.popup-dismiss {
  background: none; border: none;
  font-size: 0.75rem; text-decoration: underline;
  color: var(--sage); cursor: pointer;
}

/* ── RESPONSIVENESS ── */
@media (max-width: 900px) {
  .thesis-content-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; text-align: center; }
  .about-text-content { padding-left: 0; }
  .about-portrait { height: 380px; }
  .about-image-wrapper::before { display: none; }
  .ecosystem-grid, .speaking-grid { grid-template-columns: 1fr; }
  .framework-item, .framework-item.reverse { grid-template-columns: 1fr; gap: 3rem; text-align: center; }
  .framework-item.reverse .framework-info { order: 1; }
  .framework-item.reverse .framework-book-cover { order: 2; }
  .framework-quote { text-align: left; }
  .press-grid { grid-template-columns: 1fr; gap: 3rem; }
  .main-nav { display: none; }
  .mobile-nav-toggle { display: flex; }
}