.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 24px;
  height: 80px;
  padding: 18px clamp(12px, 3vw, 32px);
  line-height: 1.2;
  background: rgba(8, 11, 18, 0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border, var(--border));
  z-index: 10;
}

.logo {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 12px;
  color: var(--color-text, var(--muted-strong));
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.2;
  letter-spacing: 0.04em;
}

.logo img,
.logo__mark {
  display: block;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
}

.logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent, var(--accent)), var(--color-highlight, var(--highlight)));
  color: #08110e;
  font-weight: 800;
}

.derksen-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  color: var(--color-text-muted, var(--muted));
  line-height: 1.2;
  border: 1px solid var(--color-border, var(--border));
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  transition: color 0.2s ease;
}

.derksen-home-link:hover {
  color: var(--color-text, var(--muted-strong));
  border-color: rgba(63, 191, 136, 0.48);
  background: rgba(255, 255, 255, 0.07);
}

.derksen-home-link::before {
  content: '';
  width: 18px;
  height: 18px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M3 10.5 12 3l9 7.5V21a1 1 0 0 1-1 1h-5.5v-6h-5v6H4a1 1 0 0 1-1-1V10.5Z'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M3 10.5 12 3l9 7.5V21a1 1 0 0 1-1 1h-5.5v-6h-5v6H4a1 1 0 0 1-1-1V10.5Z'/%3E%3C/svg%3E") center / contain no-repeat;
}

.app-menu,
.nav-dropdown {
  position: relative;
}

.app-menu {
  flex: 0 0 auto;
}

.app-menu summary,
.nav-dropdown summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted, var(--muted));
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.app-menu summary {
  justify-content: center;
  width: 96px;
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--color-border, var(--border));
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.nav-dropdown summary {
  position: relative;
  font-size: 0.95rem;
  padding: 8px 0;
}

.app-menu summary::-webkit-details-marker,
.nav-dropdown summary::-webkit-details-marker {
  display: none;
}

.app-menu summary::after,
.nav-dropdown summary::after {
  content: '';
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.2s ease;
}

.app-menu[open] summary,
.app-menu summary:hover {
  color: var(--color-text, var(--muted-strong));
  border-color: rgba(63, 191, 136, 0.48);
  background: rgba(255, 255, 255, 0.07);
}

.nav-dropdown[open] summary,
.nav-dropdown summary:hover {
  color: var(--color-text, var(--muted-strong));
}

.app-menu[open] summary::after,
.nav-dropdown[open] summary::after {
  transform: translateY(2px) rotate(225deg);
}

.app-menu__panel,
.nav-dropdown__panel {
  position: absolute;
  top: calc(100% + 12px);
  min-width: 190px;
  padding: 10px;
  border: 1px solid var(--color-border, var(--border));
  border-radius: 16px;
  background: rgba(8, 11, 18, 0.98);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.32);
}

.app-menu__panel {
  left: 0;
}

.nav-dropdown__panel {
  right: 0;
  min-width: 210px;
}

.app-menu__panel a,
.nav-dropdown__panel a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--color-text-muted, var(--muted));
  font-weight: 500;
  line-height: 1.2;
}

.app-menu__panel a:hover,
.nav-dropdown__panel a:hover {
  background: var(--color-accent-soft, var(--accent-soft));
  color: var(--color-text, var(--muted-strong));
}

.nav__links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 0 0 0 auto;
  padding: 0;
}

.nav__links a {
  position: relative;
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted, var(--muted));
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.2;
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: transparent;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.nav__links a:hover,
.nav__links a.is-active {
  color: var(--color-text, var(--muted-strong));
}

.nav__links a.is-active::after {
  background: var(--color-accent, var(--accent));
  opacity: 1;
  transform: translateY(0);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  margin-left: auto;
  border: 1px solid var(--color-border, var(--border));
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.nav__toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text, var(--muted-strong));
}

@media (max-width: 900px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: absolute;
    top: 72px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(8, 11, 18, 0.96);
    border: 1px solid var(--color-border, var(--border));
    border-radius: 16px;
    padding: 16px 24px;
    width: min(240px, calc(100vw - 32px));
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .nav-dropdown__panel {
    position: static;
    min-width: 0;
    margin-top: 8px;
    box-shadow: none;
  }

  .nav__links.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}

@media (max-width: 520px) {
  .nav {
    gap: 24px;
  }

  .app-menu summary {
    width: 92px;
    padding-inline: 12px;
  }

  .logo {
    gap: 8px;
    font-size: 0.98rem;
  }

  .logo img,
  .logo__mark {
    flex-basis: 30px;
    width: 30px;
    height: 30px;
  }
}