:root {
  --bg: #0f0f13;
  --bg2: #16161e;
  --bg3: #1e1e2e;
  --border: #2a2a3e;
  --accent2: #81818f;
  --green: #4ade80;
  --text: #e2e2f0;
  --text2: #8888aa;
  --radius: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
}

.header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  line-height: 1;
  min-height: 80px;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  color: inherit;
}

.logo-link:hover .logo {
  color: var(--green);
}

.logo-link:focus-visible,
.nav-links a:focus-visible,
.nav-actions a:focus-visible,
.menu-toggle:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
  border-radius: 12px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.logo-mark {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark svg {
  width: 100%;
  height: 100%;
  fill: var(--green);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  color: var(--text2);
  font-size: 14px;
  white-space: nowrap;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
}

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 18px;
  flex-shrink: 0;
}

.menu-toggle:hover {
  border-color: var(--accent2);
  background: var(--bg3);
}

.menu-toggle-bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  position: relative;
}

.menu-toggle-bar::before,
.menu-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

.menu-toggle-bar::before {
  top: -5px;
}

.menu-toggle-bar::after {
  top: 5px;
}

.header-nav[data-open="true"] + .menu-toggle .menu-toggle-bar {
  background: transparent;
}

.header-nav[data-open="true"] + .menu-toggle .menu-toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.header-nav[data-open="true"] + .menu-toggle .menu-toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

.btn {
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--green);
  color: #000;
}

.btn-primary:hover {
  background: #3dc76e;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text);
  color: var(--text);
}

.btn-large {
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
}

footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  margin-top: 100px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

.footer-section h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-section a {
  display: block;
  color: var(--text2);
  font-size: 13px;
  margin-bottom: 8px;
  transition: color 0.2s;
}

.footer-section a:hover {
  color: var(--text);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
  color: var(--text2);
  font-size: 13px;
}

@media (max-width: 768px) {
  .header-wrapper {
    padding: 12px 16px;
    min-height: 64px;
    gap: 8px;
  }

  .header-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 16px;
    right: 16px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.24);
    padding: 14px;
    flex-direction: column;
    gap: 16px;
    z-index: 101;
  }

  .header-nav[data-open="true"] {
    display: flex;
  }

  .nav-links,
  .nav-actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .nav-links a {
    padding: 8px 0;
  }

  .menu-toggle {
    display: flex;
  }

  footer {
    padding: 24px 16px;
    margin-top: 60px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 640px) {
  .header-wrapper {
    padding: 12px;
    min-height: 56px;
  }

  .logo {
    font-size: 16px;
  }

  .logo-mark {
    width: 24px;
    height: 24px;
  }

  .menu-toggle {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
}