:root {
  --color-bg: #f0f8ff;
  --color-surface: rgba(17, 17, 17,0.92);
  --color-surface-soft: rgba(255, 255, 255, 0.08);
  --color-surface-card: rgba(255, 255, 255, 0.78);
  --color-text: #ffffff;
  --color--text-dark: #111111;
  --color--text-muted: #c9c9c9;
  --color-accent: 336699;
  --color-accent-2: #663366;
  --color-border: rgba(255, 255, 255, 0.14);

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.9rem;
  --radius-lg: 1.4rem;

  --shadow-sm: 0 10px 26px rgba(0, 0, 0, 0.14);
  --shadow-md: 0 18px 45px rgba(0, 0, 0, 0.24);

  --max-width: 72rem;
  --transition: 200ms ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body.page {
  margin: 0;
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at top, rgba(51, 102, 153, 0.12), transparent 35%),
    var(--color-bg);
  color: var(--color-text-dark);
  line-height: 1.6;
  font-size: clamp(1rem, 0.96rem + 0.3vw, 1.08rem);
  padding-top: 4.9rem;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

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

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

.site-header {
  background: rgba(17, 17, 17, 0.9);
  box-shadow: var(--shadow-sm);
  position: fixed;
  z-index: 1100;
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
  inset: 0 0 auto 0;
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: clamp(1.05rem, 0.95rem + 0.5vw, 1.35rem);
}

.site-header__logo {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-border);
}

.site-header__name {
  white-space: nowrap;
}

.site-header__toggle {
  background: transparent !important;
  align-items: center;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0.7rem 0.9rem;
  display: inline-flex;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.site-header__toggle:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
}

.site-nav {
  position: absolute;
  inset: 100% 0 auto 0;
  display: none;
  background: rgba(17, 17, 17, 0.96);
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.site-nav--open {
  display: block;
}

.site-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

.site-nav__item {
  position: relative;
}

.site-nav__link,
.site-nav__button,
.site-nav__sublink,
.site-nav__footer-link {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  border-radius: var (--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var (--color-text);
  transition: background var (--transition), transform var(--transition), border-color var(--transition), color var(transition);
}

.site-nav__link:hover,
.site-nav__button:hover,
.site-nav__sublink:hover,
.site-nav__footer-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-border);
  transform: translateY(-1px);
}

.site-nav__link--active {
  background: rgba(51, 102, 153, 0.35);
  border-color: rgba(51, 102, 153, 0.45);
}

.site-nav__button {
  text-align: left;
  cursor: pointer;
}

.site-nav__submenu {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0 0 0 1rem;
  display: none;
}

.site-nav__submenu--open {
  display: grid;
  gap: 0.5rem;
}

.site-nav__submenu--nested {
  padding-left: 1rem;
  margin-top: 0.5rem;
  border-left: 1px solid var(--color-border);
}

.site-nav__subitem {
  position: relative;
}

.site-nav__footer {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  display: grid;
  gap: 0.5rem;
}

.main-cotent {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.section {
  display: grid;
  gap: 1.25rem;
}

.hero__content {
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  border-radius: var(--radius-lg);
  background: var(--color-surface-card);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(14px);
}

.hero__eyebrow {
  margin: 0 0 0.75rem;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero__title {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 1.4rem + 2.6vw, 4rem);
  line-height: 1.1;
  color: var(--color-text-dark);
}

.hero__text {
  margin: 0 0 1rem;
  max-width: 65ch;
  color: #333;
}

.site-footer {
  margin-top: 3rem;
  background: rgba(17, 17, 17, 0.98);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  text-align: center;
  padding: 2.5rem 1.25rem;
  display: grid;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 1.25rem;
}

.site-footer__text,
.site-footer__copy,
.site-footer__label {
  margin: 0;
}

.site-footer__link {
  color: var(--color-text);
  transition: color var(--transition), opacity var(--transition), transform var(--transition);
}

.site-footer__link:hover {
  color: var(--color-accent);
}

.site-footer__sep {
  color: #666;
  margin: 0 0.5rem;
}

.site-footer__social {
  displau: grid;
  gap: 0.75rem;
}

.site-footer__label {
  font-size: 0.88rem;
  color: #8f8f8f;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-footer__copy {
  font-size: 0.8rem;
  color: #777;
}

.form {
  background: rgba(255, 255, 255, 0.8);
  padding: 1.25rem;
  max-width: 31.25rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: var(--shadow-sm);
}

.form_group {
  margin-button: 1rem;
}

.form_label {
  display: block;
  margin-buttom: 0.5rem;
  font-weight: 700;
  color: #222;
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 0.5rem;
  background: #fff;
  color: #111;
}

.form__input:focus,
.form__textarea:focus {
  border-coor: var(--color-accent);
  outline: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.1rem;
  background: var(--color-accent-2);
  color: #fff;
  border: 0;
  border-radius: 0.5rem;;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
  background: #550055;
}

@media (min-width: 48rem) {
  body.page {
    padding-top: 5.2rem;
  }

  .site-header__toggle {
    display: none;
  }

  .site-nav {
    position: static;
    display: block;
    padding: 0;
    background: transparent;
    border: 0;
  }

  .site-nav__list {
    grid-auto-flow: column;
    align-items: center;
    gap: 0.5rem;
  }

  .site-nav__item--has-submenu {
    position: relative;
  }

  .site-nav__submenu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    min-width: 16rem;
    padding: 0.75rem;
    background: rgba(17, 17, 17, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--shadow-md);
    box-shadow: var(--shadow-md);
    display: none;
    z-index: 1200;
  }
  .site-nav__item--has-submenu:hover > .site-nav__submenu,
  .site-nav__item--has-submenu:focus-within > .site-nav__submenu {
    display: grid;
  }

  .site-nav__button {
    width: auto;
  }

  .site-nav__footer {
    display: none;
  }

  .site-footer__inner {
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    text-align: left;
  }

  .site-footer__social {
    justify-self: center;
    text-align: center;
  }

  .site-footer__copy {
    justify-self: end;
  }
}

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

.site-footer__social-item {
  margin: 0;
}

.site-footer__social-list {
  margin: 0;
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.site-footer__social-link {
  display: inline-flex;
  padding: 0.7rem 1rem;
  align-items: center;
  justify-content: center;
  border-radius: 0.55rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.88rem;
  border: 1px solid transparent;
  transition: transform 200ms ease, opacity 200ms ease, background-color 200ms ease, border-color 200ms ease;
}

.site-footer__social-link:hover {
  transform: translateY(-2px);
  opacity: 0.92;
}

.site-footer__social-link--facebook {
  background: #1877f2;
  color: #fff;
}

.site-footer__social-link--github {
  background: #333;
  color: fff;
  border-color: #555;
}
.site-footer__social-link--tiktok {
  background: #000;
  color: #ff0050;
  border color: #333;
  text-shadow: 1px 1px 0 #00f2ea;
}