:root {
  --primary: #004080;
  --primary-hover: #0066cc;
  --background: #f5f7fa;
  --surface: #ffffff;
  --text: #263238;
  --border: #dbe4ec;
  --soft-blue: #f2f8fd;
  --shadow: 0 8px 28px rgba(24, 54, 82, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

.site-header,
.site-footer {
  background: var(--primary);
  color: #ffffff;
  text-align: center;
}

.site-header {
  padding: 34px 20px;
}

.site-header h1,
.site-header p,
.site-footer p {
  margin: 0;
}

.site-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.site-header p {
  margin-top: 4px;
  opacity: 0.9;
}

main {
  width: min(960px, calc(100% - 32px));
  margin: 28px auto;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.section {
  margin-bottom: 36px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border);
}

.section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.intro,
.contact-card {
  padding: 24px;
  background: var(--soft-blue);
  border: 1px solid #cfe0ef;
  border-radius: 10px;
}

h2 {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 1.35rem;
}

p {
  margin: 0 0 16px;
}

ul {
  margin: 0 0 18px;
  padding-left: 24px;
}

li + li {
  margin-top: 7px;
}

.contact-card ul {
  margin-bottom: 0;
}

.site-footer {
  padding: 18px 20px;
}

.floating-wrapper {
  position: fixed;
  top: 50%;
  right: 16px;
  z-index: 9999;
  display: flex;
  align-items: center;
  transform: translateY(-50%);
}

.menu-toggle {
  display: none;
  width: 35px;
  height: 70px;
  border: 0;
  border-radius: 8px 0 0 8px;
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  font-size: 20px;
  font-weight: 700;
}

.floating-menu {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.floating-menu a {
  display: flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  font-size: 20px;
  line-height: 1;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.floating-menu a:hover,
.floating-menu a:focus-visible,
.floating-menu a[aria-current="page"] {
  background: var(--primary-hover);
  text-decoration: none;
  transform: scale(1.08);
}

.floating-wrapper.hide .floating-menu {
  display: none;
}

.floating-wrapper.hide .menu-toggle {
  display: block;
}

@media (max-width: 700px) {
  main {
    width: 100%;
    margin: 0;
    padding: 24px 18px;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .site-header {
    padding: 26px 18px;
  }

  .floating-wrapper {
    right: 8px;
  }

  .floating-menu a {
    width: 42px;
    height: 42px;
  }
}

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

  .floating-menu a {
    transition: none;
  }
}