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

html {
  color-scheme: dark;
  scroll-behavior: auto;
}

body,
h1,
h2,
h3,
p,
ul {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

body {
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
}

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

button {
  margin: 0;
  border: 0;
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.94);
}

.header-inner {
  display: flex;
  width: min(100% - var(--space-6), 1200px);
  min-height: 80px;
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  position: relative;
  z-index: 102;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
}

.brand img {
  width: 40px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-link[aria-current="page"] {
  color: var(--text-primary);
}

.button {
  display: inline-flex;
  min-height: 44px;
  padding: 10px var(--space-3);
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  line-height: 1.2;
}

.button-primary {
  background: var(--accent);
  color: var(--text-on-accent);
}

.button-primary:active {
  background-color: var(--accent-active);
}

.menu-toggle {
  position: relative;
  z-index: 102;
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
}

.menu-toggle svg {
  width: 22px;
  height: 22px;
}

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

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

main {
  min-height: 48vh;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.footer-inner {
  display: grid;
  width: min(100% - var(--space-6), 1200px);
  margin-inline: auto;
  padding-block: var(--space-7) var(--space-4);
  grid-template-columns: minmax(180px, 0.8fr) minmax(260px, 1.4fr) minmax(200px, 0.8fr);
  gap: var(--space-6);
}

.footer-brand img {
  width: 48px;
}

.footer-label {
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-details {
  display: grid;
  gap: var(--space-2);
  color: var(--text-secondary);
  font-family: var(--font-secondary);
  font-size: 0.9375rem;
}

.footer-details address {
  max-width: 42ch;
  font-style: normal;
}

.footer-details a,
.footer-legal a {
  text-decoration: underline;
  text-decoration-color: var(--text-muted);
  text-underline-offset: 4px;
}

.social-links {
  display: flex;
  gap: var(--space-2);
}

.social-link {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.social-link svg {
  width: 20px;
  height: 20px;
}

.footer-legal {
  display: flex;
  width: min(100% - var(--space-6), 1200px);
  margin-inline: auto;
  padding-block: var(--space-3);
  justify-content: space-between;
  gap: var(--space-2);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
}

@media (hover: hover) and (pointer: fine) {
  .nav-link:hover,
  .footer-details a:hover,
  .footer-legal a:hover {
    color: var(--text-primary);
  }

  .button-primary:hover {
    background-color: var(--accent-hover);
  }

  .social-link:hover {
    border-color: var(--accent);
    background-color: var(--accent-subtle-bg);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .nav-link,
  .button-primary,
  .footer-details a,
  .footer-legal a,
  .social-link {
    transition:
      color var(--dur-base) var(--ease-enter),
      background-color var(--dur-base) var(--ease-enter),
      border-color var(--dur-base) var(--ease-enter);
  }

  .button-primary {
    transition:
      color var(--dur-base) var(--ease-enter),
      background-color var(--dur-base) var(--ease-enter),
      transform var(--dur-fast) var(--ease-move);
  }

  .button-primary:active {
    transform: scale(0.97);
  }
}

@media (max-width: 767px) {
  .header-inner {
    position: relative;
    width: min(100% - var(--space-4), 1200px);
    min-height: 72px;
    justify-content: center;
  }

  .site-header .brand {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }

  .site-header .brand img {
    width: 36px;
  }

  .menu-toggle {
    position: absolute;
    right: 0;
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    z-index: 101;
    inset: 0;
    display: flex;
    padding: 112px var(--space-3) var(--space-4);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: var(--space-5);
    background: var(--bg-primary);
    clip-path: circle(0 at calc(100% - 38px) 36px);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
  }

  .site-nav.is-open {
    clip-path: circle(150vmax at calc(100% - 38px) 36px);
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-1);
  }

  .nav-link {
    display: block;
    padding-block: var(--space-1);
    color: var(--text-primary);
    font-size: clamp(1.5rem, 8vw, 2.25rem);
    font-weight: 600;
    line-height: 1.2;
  }

  .site-nav .button {
    width: 100%;
    min-height: 52px;
  }

  .footer-inner {
    width: min(100% - var(--space-4), 1200px);
    padding-block: var(--space-6) var(--space-4);
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .footer-legal {
    width: min(100% - var(--space-4), 1200px);
    flex-direction: column;
  }
}

@media (max-width: 767px) and (prefers-reduced-motion: no-preference) {
  .site-nav {
    transition:
      clip-path var(--dur-fast) var(--ease-move),
      opacity var(--dur-fast) var(--ease-move),
      visibility 0s linear var(--dur-fast);
  }

  .site-nav.is-open {
    transition:
      clip-path var(--dur-move) var(--ease-enter),
      opacity var(--dur-move) var(--ease-enter),
      visibility 0s linear 0s;
  }
}