* {
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'VT323', monospace;
  font-size: 18px;
  background-color: #f5fff5;
  color: #1a1a1a;
  transition: background 0.3s, color 0.3s;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  background-color: #e6ffe6;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 10;
  border-bottom: 2px solid #6ee76e;
}

.logo {
  font-size: 1.4rem;
  font-weight: bold;
}

.nav-btn {
  margin-left: 15px;
  padding: 6px 12px;
  border: 2px solid #6ee76e;
  border-radius: 6px;
  text-decoration: none;
  color: #1a1a1a;
  transition: all 0.3s;
}

.nav-btn:hover {
  background-color: #6ee76e;
  color: white;
}

.hero {
  padding: 160px 20px 120px;
  text-align: center;
  background: linear-gradient(to bottom, #e6ffe6, #f5fff5);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.hero button {
  background-color: #6ee76e;
  color: white;
  border: none;
  padding: 12px 25px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.3s;
}

.hero button:hover {
  background-color: #58c458;
}

section {
  padding: 80px 20px;
  max-width: 900px;
  margin: auto;
}

h2 {
  font-size: 2rem;
  color: #3c8c3c;
  margin-bottom: 15px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.feature {
  background-color: #e6ffe6;
  border: 2px solid #6ee76e;
  padding: 20px;
  border-radius: 10px;
  transition: transform 0.3s, background 0.3s;
}

.feature:hover {
  transform: scale(1.05);
  background-color: #dfffdf;
}

ol, ul {
  text-align: left;
  margin: 20px auto;
  max-width: 700px;
}

blockquote {
  border-left: 4px solid #6ee76e;
  padding-left: 10px;
  margin: 15px auto;
  max-width: 700px;
  font-style: italic;
}

form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 400px;
  margin: 0 auto;
}

input, textarea {
  font-family: 'VT323', monospace;
  padding: 10px;
  border: 2px solid #6ee76e;
  border-radius: 6px;
}

button[type='submit'] {
  background-color: #6ee76e;
  color: white;
  border: none;
  padding: 10px;
  border-radius: 6px;
  cursor: pointer;
}

button[type='submit']:hover {
  background-color: #58c458;
}

footer {
  text-align: center;
  padding: 20px;
  background-color: #e6ffe6;
  border-top: 2px solid #6ee76e;
}

.hidden {
  display: none;
}

.dark-theme {
  background-color: #1a1a1a;
  color: #f5fff5;
}

.dark-theme header, .dark-theme footer {
  background-color: #2e2e2e;
}

.dark-theme .feature {
  background-color: #333;
  border-color: #58c458;
}

.dark-theme .nav-btn {
  border-color: #58c458;
  color: #f5fff5;
}