:root {
  color-scheme: light dark;
  --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, sans-serif;
  --color-bg: #f4f6fb;
  --color-bg-elevated: #ffffff;
  --color-bg-muted: #e8ecf4;
  --color-text: #12151c;
  --color-text-muted: #5c6575;
  --color-accent: #4f7bff;
  --color-accent-hover: #3b66e8;
  --color-accent-muted: #e8eeff;
  --color-border: #d5dbe6;
  --color-border-strong: #b8c0ce;
  --color-border-focus: #4f7bff;
  --color-dot: rgb(18 21 28 / 8%);
  --color-glow: rgb(79 123 255 / 35%);
  --max-width: 64rem;
  --radius: 0.25rem;
  --transition: 0.15s ease-in-out;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #07080b;
    --color-bg-elevated: #0e1117;
    --color-bg-muted: #161a22;
    --color-text: #f4f6fb;
    --color-text-muted: #99a3b4;
    --color-accent: #4f7bff;
    --color-accent-hover: #6b90ff;
    --color-accent-muted: #16213d;
    --color-border: #20262f;
    --color-border-strong: #2e3742;
    --color-border-focus: #4f7bff;
    --color-dot: rgb(255 255 255 / 3.5%);
    --color-glow: rgb(79 123 255 / 50%);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  color-scheme: light dark;
  -webkit-text-size-adjust: 100%;
}

html,
body {
  overscroll-behavior: none;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  background-image: radial-gradient(
    circle,
    var(--color-dot) 1px,
    transparent 1px
  );
  background-size: 22px 22px;
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  z-index: 50;
  transform: translateY(-150%);
  border-radius: var(--radius);
  background: var(--color-accent);
  color: #ffffff;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  transform: none;
}

header {
  background: color-mix(in srgb, var(--color-bg-elevated) 80%, transparent);
  backdrop-filter: blur(8px);
  border-top: 2px solid var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem;
}

.header-container,
.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

@media (min-width: 640px) {
  header {
    padding: 1rem 1.5rem;
  }
}

.brand {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: color var(--transition);
}

@media (hover: hover) and (pointer: fine) {
  .brand:hover,
  nav a:hover {
    color: var(--color-text);
  }
}

nav a.active {
  color: var(--color-accent);
}

main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
}

@media (min-width: 640px) {
  main {
    padding: 2rem 1.5rem 2.5rem;
  }
}

.animate-fade-up {
  animation: fade-up 0.35s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .animate-fade-up {
    animation: none;
  }
}

.about-hero {
  padding: 0.25rem 0 1.75rem;
}

.about-identity {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

@media (min-width: 640px) {
  .about-identity {
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
  }
}

.avatar {
  width: 4.5rem;
  height: 4.5rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgb(79 123 255 / 55%),
    0 10px 34px -12px var(--color-glow);
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.about-hero h1,
h2 {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

.about-hero h1 {
  font-size: 1.85rem;
  line-height: 1.15;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.about-hero p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  max-width: 40rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.15rem;
  justify-content: center;
}

@media (min-width: 640px) {
  .hero-actions {
    justify-content: flex-start;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition:
    background-color var(--transition),
    box-shadow var(--transition),
    transform 150ms ease-out;
  font-size: 0.875rem;
}

.btn:active {
  transform: scale(0.96);
}

@media (hover: hover) and (pointer: fine) {
  .btn:hover {
    background-color: var(--color-accent-hover);
    box-shadow:
      0 0 0 1px rgb(79 123 255 / 55%),
      0 10px 34px -12px var(--color-glow);
  }
}

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

@media (hover: hover) and (pointer: fine) {
  .btn-secondary:hover {
    background-color: var(--color-accent-muted);
    color: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: none;
  }
}

.link-list {
  list-style: none;
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
}

.link-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding: 0.75rem 0.9rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.link-list a {
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.link-list span {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

footer {
  background: color-mix(in srgb, var(--color-bg-elevated) 80%, transparent);
  border-top: 1px solid var(--color-border-strong);
  padding: 2rem 1rem;
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 640px) {
  footer {
    padding: 2rem 1.5rem;
    padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
  }
}

.footer-container {
  flex-direction: column;
  text-align: center;
}

@media (min-width: 640px) {
  .footer-container {
    flex-direction: row;
    text-align: left;
  }
}

.footer-brand {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

footer a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.75rem;
}

@media (hover: hover) and (pointer: fine) {
  footer a:hover {
    color: var(--color-text);
  }
}

button,
a[href],
[role="button"] {
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}