:root {
  --blue: #086cf8;
  --blue-bright: #006fff;
  --navy: #000944;
  --navy-alt: #03045e;
  --yellow: #ffeb3b;
  --radius: 10px;
  --max: 1120px;
}

[data-theme="dark"] {
  --bg: var(--navy);
  --bg-alt: var(--navy-alt);
  --text: #f4f6ff;
  --text-muted: #93a3d1;
  --card: rgba(255,255,255,0.04);
  --border: rgba(255,255,255,0.10);
  --grid-line: rgba(134,164,255,0.06);
}

[data-theme="light"] {
  --bg: #f7f8fc;
  --bg-alt: #ffffff;
  --text: #071233;
  --text-muted: #4a5578;
  --card: #ffffff;
  --border: rgba(7,18,51,0.10);
  --grid-line: rgba(8,108,248,0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.05;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { line-height: 1.65; color: var(--text-muted); margin: 0 0 1em; }

a { color: inherit; text-decoration: none; }

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue-bright);
  margin: 0 0 1em;
}

/* faint grid background across whole page */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 1.1rem;
}

.main-nav { display: flex; gap: 28px; }
.main-nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--blue-bright); }

.theme-toggle, .menu-toggle {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }
.menu-toggle { display: none; font-size: 1.1rem; }

/* hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 32px 80px;
  text-align: center;
}
[data-theme="dark"] .hero-glow {
  position: absolute;
  top: -220px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 500px;
  background: radial-gradient(closest-side, rgba(0,111,255,0.35), rgba(0,111,255,0) 70%);
  z-index: 0;
}
[data-theme="light"] .hero-glow {
  position: absolute;
  top: -220px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 500px;
  background: radial-gradient(closest-side, rgba(8,108,248,0.14), rgba(8,108,248,0) 70%);
  z-index: 0;
}
.hero-inner { position: relative; z-index: 1; max-width: 720px; margin: 0 auto; }
.hero .eyebrow { display: block; text-align: center; }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--blue-bright);
  box-shadow: 0 0 8px var(--blue-bright);
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  margin-bottom: 0.4em;
}
.hero-sub { font-size: 1.05rem; max-width: 520px; margin: 0 auto 2em; }

.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.92rem;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-bright); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--blue-bright); color: var(--blue-bright); }

/* sections */
.section {
  position: relative; z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 88px 32px;
  border-top: 1px solid var(--border);
}
.section h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }

.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  align-items: start;
}
.about-photo { width: 100%; border-radius: var(--radius); object-fit: cover; aspect-ratio: 3/4; }

blockquote {
  margin: 1.5em 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--blue);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  color: var(--text);
}
blockquote span { display: block; margin-top: 8px; font-family: 'Inter', sans-serif; font-size: 0.8rem; color: var(--text-muted); }

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 32px;
}
.photo-grid figure { margin: 0; position: relative; overflow: hidden; border-radius: var(--radius); }
.photo-grid img { width: 100%; height: 100%; aspect-ratio: 4/5; object-fit: cover; display: block; transition: transform 0.4s ease; }
.photo-grid figure:hover img { transform: scale(1.05); }
.photo-grid figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 10px 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(0deg, rgba(0,9,68,0.85), transparent);
}

.design-body { max-width: 680px; margin-top: 24px; }
.design-list { list-style: none; padding: 0; margin: 24px 0; }
.design-list li {
  display: flex; gap: 16px; align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.design-list li span {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--blue-bright);
  font-size: 0.8rem;
}
.design-note {
  font-size: 0.85rem;
  font-style: italic;
  border-left: 2px solid var(--border);
  padding-left: 14px;
}

.book-card {
  margin-top: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  max-width: 680px;
}
.book-label { font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem; color: var(--blue-bright); letter-spacing: 0.1em; text-transform: uppercase; }
.also-writing { margin-top: 20px; font-size: 0.88rem; }

.contact { text-align: center; }
.contact h2 { margin-bottom: 0.3em; }
.contact p { max-width: 480px; margin-left: auto; margin-right: auto; }
.contact-links { display: flex; gap: 14px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }

.site-footer {
  position: relative; z-index: 1;
  display: flex; justify-content: space-between; align-items: center;
  padding: 28px 32px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap; gap: 10px;
}

@media (max-width: 760px) {
  .main-nav { display: none; }
  .menu-toggle { display: flex; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 200px; }
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .site-header { padding: 14px 18px; }
  .section { padding: 64px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 2px;
}