:root {
  /* Light mode: "paper" */
  --bg: #fbfaf6;
  --ink: #0b0c0f;
  --muted: #5b5e67;
  --faint: #7a7f8b;
  --border: #e6e7eb;
  --card: #ffffff;
  --soft: #f6f7f9;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 0 rgba(10, 12, 15, 0.04), 0 10px 30px rgba(10, 12, 15, 0.06);

  --container: 1040px;

  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-serif: Fraunces, ui-serif, Georgia, "Times New Roman", serif;

  /* Subtle paper grain + soft vignette */
  --bg-texture: radial-gradient(
      1200px 800px at 20% 8%,
      rgba(11, 12, 15, 0.03),
      transparent 60%
    ),
    radial-gradient(
      900px 700px at 85% 0%,
      rgba(11, 12, 15, 0.02),
      transparent 55%
    ),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' filter='url(%23n)' opacity='.055'/%3E%3C/svg%3E");
}

/* Dark mode variables (explicit toggle) */
:root[data-theme="dark"] {
  --bg: #000000;
  --ink: #f2f4f7;
  --muted: #b2b6c0;
  --faint: #8d93a0;
  --border: rgba(255, 255, 255, 0.12);
  --card: rgba(255, 255, 255, 0.04);
  --soft: rgba(255, 255, 255, 0.06);
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.35), 0 14px 40px rgba(0, 0, 0, 0.35);
  --bg-texture: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #000000;
    --ink: #f2f4f7;
    --muted: #b2b6c0;
    --faint: #8d93a0;
    --border: rgba(255, 255, 255, 0.12);
    --card: rgba(255, 255, 255, 0.04);
    --soft: rgba(255, 255, 255, 0.06);
    --shadow: 0 1px 0 rgba(0, 0, 0, 0.35), 0 14px 40px rgba(0, 0, 0, 0.35);
    --bg-texture: none;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image: var(--bg-texture);
  background-repeat: no-repeat, no-repeat, repeat;
  background-size: auto, auto, 220px 220px;
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.6;
  letter-spacing: -0.005em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 8px;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
  color: var(--muted);
}

.muted {
  color: var(--muted);
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.6rem 0.8rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transform: translateY(-140%);
  transition: transform 160ms ease;
  z-index: 9999;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding-block: 0.85rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  white-space: nowrap;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 2.15rem;
  height: 2.15rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.brand-text {
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-nav {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.85rem;
  padding-bottom: 0.25rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  font-size: 0.95rem;
  color: var(--muted);
  padding: 0.35rem 0.15rem;
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover {
  color: var(--ink);
  text-decoration: none;
}

.theme-toggle {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.65rem;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  box-shadow: none;
}

.theme-toggle:hover {
  box-shadow: var(--shadow);
}

.theme-toggle__label {
  font-size: 0.92rem;
  font-weight: 500;
}

.theme-toggle__icon {
  font-size: 1rem;
  line-height: 1;
  opacity: 0.9;
}

.section {
  padding-block: 3.25rem;
}

.section[id] {
  scroll-margin-top: 5rem;
}

.hero {
  padding-block: 3.75rem 3.25rem;
}

.eyebrow {
  margin: 0 0 0.75rem 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.hero-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  font-size: clamp(2rem, 3.8vw, 3.2rem);
}

.hero-subtitle {
  margin: 1rem 0 0 0;
  color: var(--muted);
  max-width: 68ch;
  font-size: 1.05rem;
}

.hero-actions {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-note {
  margin: 1.5rem 0 0 0;
  color: var(--faint);
  max-width: 72ch;
  font-size: 0.98rem;
}

h2 {
  margin: 0 0 0.5rem 0;
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-size: 1.55rem;
}

h3 {
  margin: 0 0 0.35rem 0;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 1.05rem;
}

.lede {
  margin: 0.35rem 0 1.5rem 0;
  color: var(--muted);
  max-width: 78ch;
}

.grid {
  display: grid;
  gap: 1rem;
}

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

.card {
  display: block;
  padding: 1.1rem 1.05rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: none;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.card p {
  margin: 0.35rem 0 0.65rem 0;
  color: var(--muted);
}

.card-meta {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--faint);
}

.card:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  border-color: var(--ink);
  border-color: color-mix(in srgb, var(--border) 55%, var(--ink));
}

.card--static:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--border);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--bg);
  border: 1px solid color-mix(in srgb, var(--ink) 65%, var(--border));
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.button:hover {
  text-decoration: none;
  filter: brightness(0.98);
}

.button--quiet {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}

.button--quiet:hover {
  background: var(--soft);
}

.two-col {
  display: grid;
  gap: 1.25rem;
}

.aside {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.05rem;
}

.aside h3 {
  margin-top: 0.2rem;
}

.list {
  margin: 0.6rem 0 1.1rem 0;
  padding-left: 1.1rem;
}

.list--spaced li {
  margin-block: 0.35rem;
}

.item-title {
  font-weight: 600;
}

.item-note {
  margin-left: 0.45rem;
  color: var(--muted);
}

.link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.shelves {
  grid-template-columns: 1fr;
}

.shelf {
  padding: 1.1rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.photo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.photo {
  margin: 0;
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
}

.photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--soft);
}

.photo figcaption {
  padding: 0.75rem 0.9rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.links {
  grid-template-columns: 1fr;
}

.link-card {
  display: grid;
  gap: 0.25rem;
  padding: 1.05rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.link-card:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.link-card__title {
  font-weight: 600;
}

.link-card__meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.callout {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  background: linear-gradient(
    180deg,
    var(--card),
    color-mix(in srgb, var(--card) 88%, var(--soft))
  );
  padding: 1.15rem 1.1rem;
}

.callout-title {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.callout-body {
  margin: 0.5rem 0 0 0;
  color: var(--muted);
  max-width: 78ch;
}

.site-footer {
  padding-block: 2.25rem;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  gap: 0.35rem;
}

@media (min-width: 720px) {
  .header-inner {
    grid-template-columns: auto 1fr auto;
  }

  .site-nav {
    grid-column: auto;
    justify-content: center;
    padding-bottom: 0;
  }

  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .photo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .two-col {
    grid-template-columns: 1.25fr 0.75fr;
    align-items: start;
  }

  .shelves {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .photo-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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