:root {
  /* Site name and menu. Also considered: "Caveat Brush", "Permanent Marker". */
  --script: "Kalam", "Segoe UI", cursive;
  --bg: #fff;
  --fg: #0a0a0a;
  --muted: #737373;
  --line: #e5e5e5;
  --soft: #f5f5f5;
  --link: #2563eb;
  /* Substack publication accent, from --color_theme_accent. */
  --accent: #0f766e;
  --swoosh: var(--accent);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0a0a0a;
    --fg: #fafafa;
    --muted: #a1a1a1;
    --line: #ffffff1a;
    --soft: #171717;
    --link: #60a5fa;
    --accent: #0f766e;
    --swoosh: #5eead4;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0a0a0a;
  --fg: #fafafa;
  --muted: #a1a1a1;
  --line: #ffffff1a;
  --soft: #171717;
  --link: #60a5fa;
  --accent: #0f766e;
  --swoosh: #5eead4;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #fff;
  --fg: #0a0a0a;
  --muted: #737373;
  --line: #e5e5e5;
  --soft: #f5f5f5;
  --link: #2563eb;
  --accent: #0f766e;
  --swoosh: var(--accent);
  color-scheme: light;
}

@font-face {
  font-family: "Kalam";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/fonts/kalam-700.woff2") format("woff2");
}

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

html {
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 1.05rem;
  line-height: 1.55;
}

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

a {
  color: var(--fg);
  text-underline-offset: 0.18em;
}

a:not(.button):not(.skip-link):not(.socials a) {
  transition: color 0.15s ease;
}

a:not(.button):not(.skip-link):not(.socials a):hover,
a:not(.button):not(.skip-link):not(.socials a):focus-visible {
  color: var(--link);
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0;
  transform: translateY(-120%);
  background: var(--fg);
  color: var(--bg);
  padding: 0.45rem 0.7rem;
  z-index: 20;
  text-decoration: none;
}

.skip-link:focus {
  transform: none;
  top: 0.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  width: min(68rem, calc(100% - 3rem));
  margin: 0 auto;
  padding: 1.15rem 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}

.brand,
nav a {
  font-family: var(--script);
  font-weight: 700;
}

.brand {
  letter-spacing: 0.01em;
  text-decoration: none;
  font-size: 2.15rem;
  line-height: 1;
  color: var(--fg);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin-left: auto;
}

.menu-toggle {
  display: none;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--fg);
  place-items: center;
  cursor: pointer;
  padding: 0;
}

.menu-toggle svg {
  width: 1.2rem;
  height: 1.2rem;
}

.menu-toggle .icon-close {
  display: none;
}

.menu-toggle[aria-expanded="true"] .icon-open {
  display: none;
}

.menu-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

nav ul {
  display: flex;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

nav a {
  text-decoration: none;
  color: var(--fg);
  font-size: 1.55rem;
  line-height: 1;
}

nav a[aria-current="page"] {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.22em;
}

.theme-toggle {
  width: 2.35rem;
  height: 2.35rem;
  border: 0;
  border-radius: 0.7rem;
  background: #fff;
  color: #0a0a0a;
  box-shadow: 0 1px 2px rgba(10, 10, 10, 0.06), 0 4px 12px rgba(10, 10, 10, 0.08);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
}

:root[data-theme="dark"] .theme-toggle {
  background: #171717;
  color: #fafafa;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 14px rgba(0, 0, 0, 0.35);
}

.theme-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
}

.icon-sun,
.icon-moon {
  display: none;
}

:root[data-theme="light"] .icon-sun,
:root:not([data-theme]) .icon-sun {
  display: block;
}

:root[data-theme="dark"] .icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle {
    background: #171717;
    color: #fafafa;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 14px rgba(0, 0, 0, 0.35);
  }

  :root:not([data-theme]) .icon-sun {
    display: none;
  }

  :root:not([data-theme]) .icon-moon {
    display: block;
  }
}

main {
  width: min(40rem, calc(100% - 3rem));
  margin: 0 auto;
  padding: 2.25rem 0 4rem;
  animation: rise 0.45s ease both;
}

main.home,
main.page {
  width: min(68rem, calc(100% - 3rem));
}

main.home {
  display: grid;
  grid-template-columns: minmax(16rem, 22rem) minmax(0, 1fr);
  column-gap: 4.5rem;
  align-items: start;
}

main.page > * {
  max-width: 40rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

h1 {
  margin: 0 0 0.45rem;
  font-size: clamp(2rem, 6vw, 2.7rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 700;
}

h2 {
  margin: 2.25rem 0 0.75rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.lede {
  margin: 0;
  font-size: 1.12rem;
}

.profile h1 {
  margin: 1rem 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.5;
}

.profile p {
  margin: 0;
  color: var(--muted);
}

.profile p a {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.profile h2 {
  margin-top: 1.5rem;
}

.home-main > section:first-child h2 {
  margin-top: 0.15rem;
}

.avatar {
  width: 7rem;
  height: 7rem;
  border-radius: 50%;
  object-fit: cover;
  flex: none;
}

main.about {
  width: min(40rem, calc(100% - 3rem));
  line-height: 1.8;
}

main.about p {
  margin: 0 0 1.65rem;
}

main.about p:last-child {
  margin-bottom: 0;
}

.about-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 2.4rem;
  text-align: center;
}

.about-head .avatar {
  width: 4.5rem;
  height: 4.5rem;
}

.about-head h1 {
  margin: 0;
}

.mark {
  position: relative;
  display: inline-block;
  padding-bottom: 0.22em;
}

.swoosh {
  position: absolute;
  left: -0.12em;
  width: calc(100% + 0.35em);
  height: 0.62em;
  bottom: -0.12em;
  color: var(--swoosh);
  overflow: visible;
  pointer-events: none;
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  list-style: none;
  margin: 0.15rem 0 0;
  padding: 0;
}

.socials a {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  text-decoration: none;
  color: var(--fg);
  border-radius: 999px;
}

.socials img,
.icon-mail {
  width: 1.35rem;
  height: 1.35rem;
}

:root[data-theme="dark"] .icon-x,
:root[data-theme="dark"] .icon-github {
  filter: invert(1);
}

.newsletter p {
  margin: 0;
  color: var(--muted);
}

.newsletter-form {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.85rem;
}

.newsletter-form input {
  flex: 1;
  min-width: 0;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid color-mix(in srgb, var(--fg) 28%, transparent);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
}

.newsletter-form input::placeholder {
  color: var(--muted);
}

.newsletter-form .button {
  margin-top: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.35rem;
}

.button {
  display: inline-block;
  margin-top: 1.35rem;
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  border: 1px solid var(--fg);
  padding: 0.55rem 1.05rem;
  transition: transform 0.18s ease;
}

.actions .button {
  margin-top: 0;
}

.button-secondary {
  background: transparent;
  color: var(--fg);
}

.button:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.products {
  list-style: none;
  margin: 0;
  padding: 0;
}

.product {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 0.85rem;
  align-items: start;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
  transition: transform 0.18s ease;
}

.product:last-child {
  border-bottom: 1px solid var(--line);
}

.latest .product {
  grid-template-columns: 1fr;
}

.product-plain > div {
  grid-column: 2;
}

.product:hover {
  transform: translateY(-2px);
}

.product h3 {
  margin: 0;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}

.product h3 a {
  color: inherit;
}

.product p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.product p + p {
  margin-top: 0.55rem;
}

.logo {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.65rem;
  object-fit: cover;
  background: #fff;
}

.links {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
}

.links li + li {
  margin-top: 0.35rem;
}

.posts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.posts li {
  padding: 0.95rem 0;
}

.posts li + li {
  border-top: 1px solid var(--line);
}

.posts h3 {
  margin: 0.1rem 0 0.2rem;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.posts p {
  margin: 0;
  color: var(--muted);
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.15rem 0 1.75rem;
}

.site-footer p {
  width: min(68rem, calc(100% - 3rem));
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.08rem;
}

@media (max-width: 52rem) {
  main.home {
    grid-template-columns: 1fr;
    row-gap: 2.25rem;
  }
}

@media (max-width: 40rem) {
  .brand {
    font-size: 1.85rem;
  }

  .menu-toggle {
    display: grid;
  }

  .header-tools {
    gap: 0.55rem;
  }

  #site-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 0.35rem 0 1rem;
  }

  #site-menu.is-open {
    display: block;
  }

  #site-menu ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }

  #site-menu a {
    font-size: 1.15rem;
  }

  .newsletter-form {
    flex-direction: column;
    align-items: stretch;
  }
}

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

@media (forced-colors: active) {
  .button,
  .theme-toggle {
    border: 1px solid ButtonText;
  }
}