/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-muted: #707070;
  --accent: #ffffff;
  --border: #2a2a2a;
  --hover: #1a1a1a;
}

/* Global vertical rhythm: change this to adjust spacing between major sections */
:root {
  --section-gap: 56px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-primary);
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
  padding: 64px 32px;
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Serif fonts for headings */
h1, h2, h3, h4, h5, h6 {
  font-family: "Georgia", "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--accent);
}

a {
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: all 0.2s ease;
}

a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

strong {
  color: var(--accent);
  font-weight: 600;
}

em {
  color: var(--text-secondary);
  font-style: italic;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
  margin-bottom: var(--section-gap);
  padding: 24px 0;
}

.hero-content {
  max-width: 700px;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 24px;
  font-weight: 300;
  letter-spacing: -0.03em;
}

.hero-intro {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 700px;
}

.hero-intro em {
  color: var(--accent);
  font-style: italic;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: 4px;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--bg-primary);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* ===================================
   SECTION STYLES
   =================================== */
section {
  margin-bottom: var(--section-gap);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 24px;
  font-weight: 300;
  letter-spacing: -0.02em;
}

/* ===================================
   PHILOSOPHY SECTION
   =================================== */
.philosophy-content {
  max-width: 680px;
}

.lead {
  font-size: 1.35rem;
  line-height: 1.6;
  margin-bottom: 32px;
  color: var(--accent);
  font-style: italic;
}

.philosophy-content p {
  margin-bottom: 24px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ===================================
   SCALE SECTION
   =================================== */
.scale-intro {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: 650px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  margin-bottom: 48px;
}

.metric-item {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.metric-number {
  font-size: 2.5rem;
  font-family: "Georgia", serif;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 300;
}

.metric-label {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.scale-cta {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ===================================
   CURIOSITY SECTION
   =================================== */
.curiosity-intro {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.exploration-list {
  list-style: none;
  margin-bottom: 64px;
}

.exploration-list li {
  margin-bottom: 24px;
  padding-left: 24px;
  border-left: 2px solid var(--border);
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.exploration-list li strong {
  display: block;
  margin-bottom: 4px;
}

.bookshelf {
  padding: 40px;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  border: 1px solid var(--border);
}

.bookshelf h3 {
  font-size: 1.25rem;
  margin-bottom: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--accent);
}

.book-list {
  list-style: none;
}

.book-list li {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  padding-left: 20px;
  position: relative;
}

.book-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--text-muted);
}

/* ===================================
   RESUME SECTION
   =================================== */
.resume-section {
  margin-bottom: var(--section-gap);
  padding: 24px 0;
  text-align: center;
}

.resume-cta {
  max-width: 600px;
  margin: 0 auto;
}

.resume-cta p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
  margin-top: var(--section-gap);
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-title {
  font-size: 2rem;
  margin-bottom: 20px;
  font-weight: 300;
}

.footer-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.footer-links {
  font-size: 1.05rem;
}

.footer-links a {
  border: none;
  color: var(--text-primary);
}

.footer-links a:hover {
  color: var(--accent);
  border: none;
}

.separator {
  margin: 0 16px;
  color: var(--text-muted);
}

/* ===================================
   NOTES/ABOUT PAGE
   =================================== */
.notes-intro {
  margin-bottom: 64px;
}

.notes-intro h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  font-weight: 300;
}

.notes-content {
  max-width: 680px;
}

.notes-content h2 {
  font-size: 1.75rem;
  margin-top: 64px;
  margin-bottom: 32px;
  font-weight: 300;
}

.post-list {
  list-style: none;
}

.post-list li {
  margin-bottom: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.post-date {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-right: 16px;
  min-width: 140px;
}

.post-list a {
  font-size: 1.1rem;
  border: none;
}

.contact-section {
  margin-top: 80px;
  padding-top: 60px;
  border-top: 1px solid var(--border);
}

.contact-section h2 {
  font-size: 1.75rem;
  margin-bottom: 24px;
  font-weight: 300;
}

.contact-section p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-size: 1.05rem;
}

.contact-list {
  list-style: none;
}

.contact-list li {
  margin-bottom: 12px;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.contact-list a {
  border: none;
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 768px) {
  body {
    padding: 60px 24px;
  }
  
  .hero {
    margin-bottom: var(--section-gap);
    padding: 20px 0;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    text-align: center;
  }
  
  section {
    margin-bottom: var(--section-gap);
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .lead {
    font-size: 1.2rem;
  }
  
  .metrics {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .metric-number {
    font-size: 2rem;
  }
  
  .bookshelf {
    padding: 24px;
  }
  
  .footer {
    margin-top: var(--section-gap);
  }
  
  .footer-title {
    font-size: 1.75rem;
  }
  
  .post-date {
    display: block;
    margin-bottom: 8px;
    min-width: auto;
  }
}