:root {
  --bg-light: #f8f9fa;
  --text-light: #212529;
  --primary-light: #ffffff;
  --accent-light: #0d6efd;

  --bg-dark: #121212;
  --text-dark: #e0e0e0;
  --primary-dark: #1f1f1f;
  --accent-dark: #0d6efd;
}

html[data-theme="light"] {
  --bg: var(--bg-light);
  --text: var(--text-light);
  --primary: var(--primary-light);
  --accent: var(--accent-light);
}

html[data-theme="dark"] {
  --bg: var(--bg-dark);
  --text: var(--text-dark);
  --primary: var(--primary-dark);
  --accent: var(--accent-dark);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}

nav {
  background-color: #000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  flex-wrap: wrap;
}

.nav-left {
  display: flex;
  align-items: center;
}

.nav-right {
  display: flex;
  align-items: center;
}

.logo {
  max-height: 56px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  transition: background 0.3s;
}

.nav-links a:hover {
  background-color: var(--accent);
  color: white;
}

#themeToggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text);
  cursor: pointer;
  margin-left: 1rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  margin-left: 1rem;
}

.hamburger div {
  width: 25px;
  height: 3px;
  background-color: var(--text);
  margin: 4px 0;
}

@media (max-width: 700px) {
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--primary);
    padding: 1rem 0;
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: flex;
  }
}

header {
  background-color: var(--primary);
  color: var(--text);
  padding: 20px;
  text-align: center;
}

.content {
  flex: 1;
  max-width: 900px;
  margin: auto;
  padding: 30px 20px;
}

section {
  display: none;
  animation: fadeIn 0.3s ease-in;
}

section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

h2 {
  color: var(--accent);
}

.newsletter {
  background: var(--primary);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  margin-top: 20px;
}

input[type="email"] {
  padding: 10px;
  width: 60%;
  max-width: 300px;
  border: 1px solid #ccc;
  border-radius: 4px;
  margin-right: 10px;
}

button.subscribe {
  padding: 10px 16px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

footer {
  background-color: var(--primary);
  color: var(--text);
  text-align: center;
  padding: 15px;
}