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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-dark);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

body.nav-open,
body.lightbox-open {
  overflow: hidden;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
}

button,
input,
textarea {
  font: inherit;
}

section[id] {
  scroll-margin-top: var(--scroll-margin);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

@media (min-width: 1440px) {
  .container {
    max-width: var(--container-wide);
  }

  .site-nav {
    max-width: var(--container-wide);
  }
}

@media (min-width: 1600px) {
  :root {
    --container-wide: 1520px;
  }
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-bg-teal);
  margin: 0 0 2rem;
  line-height: 1.3;
}

.grayscale-photo {
  filter: grayscale(100%);
  transition: filter 0.4s ease;
}

@media (hover: hover) {
  .grayscale-photo:hover {
    filter: grayscale(0%);
  }
}

.binary-bg {
  background-color: var(--color-white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='24' viewBox='0 0 120 24'%3E%3Ctext x='0' y='16' font-family='monospace' font-size='10' fill='%230a2f4a' fill-opacity='0.08'%3E01010101%3C/text%3E%3C/svg%3E");
  background-size: 120px 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.2s, border-color 0.2s;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-cta);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-cta-hover);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn--ghost:hover {
  border-color: var(--color-white);
  background: rgba(255, 255, 255, 0.08);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}