/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #d81921;
  --primary-dark: #c62828;
  --text-color: #263238;
  --bg-dark: #21201e;
  --bg-light: #f5f5f5;
  --link-color: #1b95e0;
  --spacing: 1rem;
}

body {
  font-family: 'Helvetica', sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  padding-top: 3.5rem;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--spacing) 0;
  font-weight: 900;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--primary-color);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  height: 3.5rem;
  overflow: hidden;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing);
}

.nav-links {
  display: flex;
  justify-content: flex-end;
  list-style: none;
}

.nav-links li a {
  display: block;
  padding: 1rem;
  color: white;
  transition: background-color 0.3s;
}

.nav-links li.active a,
.nav-links li a:hover {
  background-color: var(--primary-dark);
}

/* Header */
.header {
  background-color: var(--bg-dark);
  padding: 4rem 1rem;
  text-align: center;
}

.header h1 {
  color: white;
  margin: 0 auto;
  max-width: 800px;
  font-size: 3.5rem;
  line-height: 1.2;
}

.header h2 {
  color: white;
  margin: 0.5rem auto 0;
  max-width: 800px;
  font-weight: 300;
  font-size: 1.5rem;
  opacity: 0.9;
}

/* CTA Section */
.cta {
  background-color: var(--bg-light);
  padding: 3rem 1rem;
  text-align: center;
  font-size: 1.3rem;
  font-weight: 300;
}

/* Interactive Section */
.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem var(--spacing);
}

.interactive-section {
  max-width: 800px;
  margin: 0 auto;
}

.api-input {
  display: flex;
  margin: 1rem 0;
  border: 1px solid #ddd;
  border-radius: 4px;
  overflow: hidden;
}

.api-prefix {
  padding: 0.5rem 1rem;
  background: var(--bg-light);
  border-right: 1px solid #ddd;
  white-space: nowrap;
}

#interactive {
  flex: 1;
  padding: 0.5rem;
  border: none;
  outline: none;
}

.api-input button {
  padding: 0.5rem 1.5rem;
  background: var(--link-color);
  color: white;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s;
}

.api-input button:hover {
  background-color: #1576b3;
}

.hints {
  font-size: 0.9rem;
  margin: 1rem 0;
}

.output {
  background: var(--bg-light);
  padding: 1rem;
  border-radius: 4px;
  overflow: auto;
  max-height: 400px;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .api-input {
    flex-direction: column;
  }

  .api-prefix {
    border-right: none;
    border-bottom: 1px solid #ddd;
  }
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 1rem;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: white;
  margin: 4px 0;
  transition: 0.3s;
}