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

body {
  font-family: Arial, sans-serif;
  background-color: #000;
  color: #fff;
  line-height: 1.6;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background-color: #111;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
  z-index: 1000;
}

.logo {
  max-width: 50px;
  height: auto;
  display: block;
}

.nav-links {
  display: flex;
  gap: 20px;
}

.nav-links a {
  text-decoration: none;
  font-size: 16px;
  color: #00ffcc;
  transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: #00e6b3;
  outline: none;
}

.content {
  padding-top: 80px;
  padding-left: 20px;
  padding-right: 20px;
}

.header-toggle {
  display: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  width: auto;
  margin: 0;
  padding: 0.5rem;
  background: none;
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  z-index: 1002;
}

.panel-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
}

.panel-overlay.active {
  display: block;
}

.mobile-panel {
  position: fixed;
  top: 0;
  left: -100%;
  width: 80%;
  max-width: 300px;
  height: 100%;
  background-color: #111;
  transition: left 0.3s ease-in-out;
  z-index: 1001;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-panel.open {
  left: 0;
}

.close-panel {
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  align-self: flex-end;
  cursor: pointer;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.mobile-nav a {
  text-decoration: none;
  font-size: 16px;
  color: #ccc;
  transition: color 0.2s;
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: #00ffcc;
}

@media (max-width: 768px) {
  header > .nav-links {
    display: none;
  }

  .header-toggle {
    display: block;
  }

  .content {
    padding-top: 80px;
    padding-left: 5vw;
    padding-right: 5vw;
  }
}