@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-color: #0f172a;
  --text-color: #f8fafc;
  --text-muted: #94a3b8;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --glass-bg: rgba(15, 23, 42, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --card-bg: #1e293b;
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-menu a:hover {
  color: #fff;
}

.nav-menu a:hover::after {
  width: 100%;
}

.nav-actions .btn {
  background: var(--gradient-primary);
  color: white;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: inline-block;
  border: none;
  cursor: pointer;
}

.nav-actions .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.lang-select {
  background: var(--glass-bg);
  color: var(--text-color);
  border: 1px solid var(--glass-border);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s ease;
}

.lang-select:hover, .lang-select:focus {
  border-color: var(--accent-color);
}

.lang-select option {
  background-color: var(--card-bg);
  color: var(--text-color);
}

/* Main Layout */
.main-content {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 72px);
}

/* Editor Section */
.editor-section {
  width: 100%;
  height: calc(100vh - 72px);
  display: flex;
  background-color: #1e1e1e; /* Editor typically looks dark */
  position: relative;
  overflow: hidden;
}

.editor-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Content Sections Container */
.content-container {
  max-width: 1000px;
  margin: 4rem auto;
  padding: 0 2rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  text-align: center;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Introduction Section */
.intro-section {
  margin-bottom: 5rem;
  background: var(--card-bg);
  padding: 3rem;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.intro-section p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.intro-section p:last-child {
  margin-bottom: 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  padding: 2rem;
  border-radius: 12px;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.05);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: #fff;
}

.feature-card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* FAQ Section */
.faq-section {
  margin-bottom: 5rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(59, 130, 246, 0.5);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.5rem;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
}

.faq-icon {
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background-color: var(--accent-color);
  transition: transform 0.3s ease;
}

.faq-icon::before {
  top: 11px;
  left: 4px;
  width: 16px;
  height: 2px;
}

.faq-icon::after {
  top: 4px;
  left: 11px;
  width: 2px;
  height: 16px;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-item.active .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 0 1.5rem;
  color: var(--text-muted);
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding-bottom: 1.5rem;
}

/* Footer */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--glass-border);
  padding: 3rem 0;
  text-align: center;
}

.footer-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #fff;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Media Queries */
@media (max-width: 768px) {
  .nav-menu {
    display: none; /* Hide for mobile for simplicity, or implement a hamburger */
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .intro-section {
    padding: 2rem;
  }
}