@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg-color: #0B0C10;
  --text-primary: #FFFFFF;
  --text-secondary: #9CA3AF;
  --accent-1: #667EEA;
  --accent-2: #764BA2;
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-1);
}

/* Glassmorphism utility */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--glass-bg);
  border-color: var(--text-primary);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 12, 16, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.nav-links {
  display: none;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
  }
}

/* Hero Section */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(102,126,234,0.15) 0%, rgba(11,12,16,0) 70%);
  z-index: -1;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .hero h1 {
    font-size: 4rem;
  }
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero .cta-group {
  display: flex;
  flex-direction: column;
  gap: 15px;
  align-items: center;
  justify-content: center;
}

@media (min-width: 480px) {
  .hero .cta-group {
    flex-direction: row;
  }
}

/* Sections General */
section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 50px;
  font-weight: 700;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-top: -40px;
  margin-bottom: 50px;
}

/* Grid Layouts */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Feature Cards */
.feature-card {
  padding: 30px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(102, 126, 234, 0.4);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 15px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Support & AI Banner */
.support-banner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  padding: 40px 20px;
  margin-top: 50px;
  text-align: center;
}

.support-item {
  font-weight: 600;
  padding: 10px 20px;
  background: rgba(255,255,255,0.03);
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  transition: color 0.3s ease, border-color 0.3s ease;
}

.support-item:hover {
  color: var(--text-primary);
  border-color: var(--accent-1);
}

/* Pricing */
.pricing-card {
  padding: 40px 30px;
  text-align: center;
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.popular {
  border: 1px solid var(--accent-1);
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(102, 126, 234, 0.15);
}

@media (max-width: 767px) {
  .pricing-card.popular {
    transform: none;
  }
}

.popular-badge {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.pricing-title {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 20px;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.pricing-features {
  list-style: none;
  margin-bottom: 30px;
  text-align: left;
  flex-grow: 1;
}

.pricing-features li {
  margin-bottom: 12px;
  color: var(--text-secondary);
  position: relative;
  padding-left: 25px;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-1);
  font-weight: bold;
}

/* Testimonials */
.testimonial-card {
  padding: 30px;
  font-style: italic;
  color: var(--text-secondary);
}

.testimonial-author {
  margin-top: 20px;
  font-style: normal;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.testimonial-author::before {
  content: '';
  display: inline-block;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  opacity: 0.5;
}

/* FAQ */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 15px;
  border-bottom: 1px solid var(--glass-border);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  transition: transform 0.3s ease;
  color: var(--accent-1);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-secondary);
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 20px;
}

/* Content Pages (About, Terms, etc) */
.page-header {
  padding: 80px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 50px;
}

.page-title {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.page-subtitle {
  color: var(--text-secondary);
}

.page-content {
  max-width: 800px;
  margin: 0 auto 80px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.page-content h2 {
  color: var(--text-primary);
  margin: 40px 0 20px;
  font-size: 1.5rem;
}

.page-content p {
  margin-bottom: 20px;
}

.page-content ul {
  margin-bottom: 20px;
  padding-left: 20px;
}

.page-content li {
  margin-bottom: 10px;
}

/* Footer */
footer {
  border-top: 1px solid var(--glass-border);
  padding: 40px 0;
  margin-top: 40px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

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

.footer-links a:hover {
  color: var(--text-primary);
}

.copyright {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Blog / Articles Section */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.article-image {
  height: 200px;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--accent-1);
}

.article-content {
  padding: 25px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.4;
}

.article-title a {
  color: var(--text-primary);
}

.article-title a:hover {
  color: var(--accent-1);
}

.article-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-link {
  color: var(--accent-1);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 5px;
}

.article-link:hover {
  color: var(--accent-2);
}