:root {
    --ink: #0e0e0e;
    --ink-muted: #555;
    --paper: #f5f5f5;
    --accent: #1a1aff;
    --rule: hsl(0, 0%, 85.1%);
    --white: #fff;
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { font-size: 16px; scroll-behavior: smooth; }
  body {
    background: var(--paper); color: var(--ink);
    font-family: 'DM Sans', sans-serif; font-weight: 400;
    line-height: 1.7; -webkit-font-smoothing: antialiased;
  }

  /* NAV */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 1.25rem 3rem;
    display: flex; align-items: center; justify-content: space-between;
    background: var(--white); border-bottom: 1px solid var(--rule);
  }
  .nav-links { display: flex; gap: 2rem; }
  .nav-links a {
    font-size: 0.85rem; color: var(--ink-muted);
    text-decoration: none; letter-spacing: 0.03em; transition: color 0.2s;
  }
  .nav-links a:hover, .nav-links a.active { color: var(--ink); }
  .nav-links a.active { text-decoration: underline; text-underline-offset: 4px; }

  /* LAYOUT */
  .wide { max-width: 1100px; margin: 0 auto; padding: 0 3rem; }
  .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }

  /* HERO */
  .hero {
    padding-top: 7rem;
    padding-bottom: 5rem;
    background: var(--white);
  }
  .hero h1 {
    font-family: 'Source Serif 4', serif;
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 900; line-height: 1.1;
    letter-spacing: -0.02em; margin-bottom: 1.75rem;
  }
  .hero p {
    font-size: 1rem; line-height: 1.8;
    color: var(--ink-muted); max-width: 480px;
  }
  .headshot-wrap {
    border-radius: 20px; overflow: hidden;
    background: #e8e4dc;
    aspect-ratio: 4/5;
    max-width: 420px;
    margin-left: auto;
  }
  .headshot-wrap img {
    width: 100%; height: 100%; object-fit: cover; display: block;
  }

  /* WHAT I'VE LEARNED */
  .learned { padding: 5rem 0; }
  .learned-img {
    border-radius: 16px; overflow: hidden;
    background: #c8c4bc;
    aspect-ratio: 4/5;
  }
  .learned-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
  .learned-content { display: flex; flex-direction: column; gap: 0; }
  .learned h2 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.9rem; font-weight: 700;
    line-height: 1.2; letter-spacing: -0.01em;
    margin-bottom: 2.5rem;
  }
  .principle-item { padding: 1.5rem 0; }
  .principle-item:not(:last-child) { border-bottom: 1px solid var(--rule); }
  .principle-item h3 {
    font-size: 0.95rem; font-weight: 600;
    color: var(--ink); margin-bottom: 0.4rem;
  }
  .principle-item p {
    font-size: 0.875rem; color: var(--ink-muted);
    line-height: 1.7; margin: 0;
  }

  /* TESTIMONIALS */
  .testimonials {
    background: var(--ink); padding: 5rem 0;
  }
  .testimonials h2 {
    font-family: 'Source Serif 4', serif;
    font-size: 1.9rem; font-weight: 700;
    color: var(--white); letter-spacing: -0.01em;
    margin-bottom: 3rem;
  }
  .testimonial-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 3rem 4rem;
  }
  .testimonial blockquote {
    font-size: 0.95rem; font-style: normal;
    line-height: 1.75; color: rgba(255,255,255,0.75);
    border-left: none; padding: 0;
    margin-bottom: 1.25rem;
  }
  .testimonial blockquote::before { content: '\201C'; }
  .testimonial blockquote::after { content: '\201D'; }
  .testimonial-author { display: flex; align-items: center; gap: 0.875rem; }
  .author-photo {
    width: 44px; height: 44px; border-radius: 50%;
    object-fit: cover; flex-shrink: 0;
    background: #333; border: 1px solid rgba(255,255,255,0.1);
  }
  .author-info {}
  .author-name {
    font-size: 0.875rem; font-weight: 600;
    color: var(--white); display: block;
  }
  .author-title {
    font-size: 0.8rem; color: rgba(255,255,255,0.5);
  }

  /* FOOTER */
  footer {
    border-top: 1px solid var(--rule);
    padding: 3.5rem 0;
    background: var(--white);
  }
  .footer-inner {
    display: grid; grid-template-columns: 1fr auto auto;
    gap: 4rem; align-items: start;
  }
  .footer-name {
    font-family: 'Source Serif 4', serif;
    font-size: 1.4rem; font-weight: 700; color: var(--ink);
  }
  .footer-links { display: flex; flex-direction: column; gap: 0.5rem; }
  .footer-links a {
    font-size: 0.875rem; color: var(--ink-muted);
    text-decoration: none; transition: color 0.2s;
  }
  .footer-links a:hover { color: var(--ink); }

  /* ANIMATIONS */
  .fade-in { opacity: 0; transform: translateY(16px); animation: fadeUp 0.65s ease forwards; }
  @keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
  .fade-in:nth-child(1) { animation-delay: 0.05s; }
  .fade-in:nth-child(2) { animation-delay: 0.18s; }
  .fade-in:nth-child(3) { animation-delay: 0.3s; }
  .fade-in:nth-child(4) { animation-delay: 0.42s; }

  /* RESPONSIVE */
  @media (max-width: 900px) {
    nav { padding: 1rem 1.5rem; }
    .wide { padding: 0 1.5rem; }
    .two-col { grid-template-columns: 1fr; gap: 2.5rem; }
    .headshot-wrap { max-width: 100%; margin: 0; aspect-ratio: 3/2; }
    .learned-img { aspect-ratio: 3/2; }
    .testimonial-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  }