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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  background: #f4f7fb;
  color: #1f2937;
  line-height: 1.6;
}

.container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0f172a, #1d3b8b);
  color: white;
  padding: 80px 0;
}

.badge {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  margin-bottom: 20px;
  font-size: 14px;
}

h1 {
  font-size: 54px;
  line-height: 1.12;
  max-width: 900px;
  margin-bottom: 22px;
}

.highlight {
  color: #93c5fd;
}

.subtitle {
  max-width: 820px;
  font-size: 20px;
  color: #dbeafe;
  margin-bottom: 30px;
}

.actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.section {
  padding: 80px 0;
}

.light-section {
  background: #f4f7fb;
}

.dark-section {
  background: #0f172a;
  color: white;
}

.section-heading {
  margin-bottom: 34px;
}

.section-heading h2 {
  font-size: 38px;
  margin-bottom: 10px;
}

.section-heading p {
  font-size: 17px;
  color: inherit;
  opacity: 0.85;
}

.tool-grid,
.gpt-grid {
  display: grid;
  gap: 24px;
}

.tool-grid {
  grid-template-columns: repeat(2, 1fr);
}

.gpt-grid {
  grid-template-columns: repeat(3, 1fr);
}

.tool-card,
.gpt-card {
  border-radius: 20px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.tool-card {
  background: white;
  border: 1px solid #e5e7eb;
}

.gpt-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.tool-card h3,
.gpt-card h3 {
  font-size: 28px;
  margin-bottom: 14px;
}

.tool-card p,
.gpt-card p {
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 22px;
}

.gpt-card p {
  color: #dbeafe;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 14px 22px;
  border-radius: 12px;
  font-weight: bold;
  transition: 0.2s ease;
}

.btn-primary {
  background: white;
  color: #0f172a;
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-secondary {
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.btn-dark {
  background: #0f172a;
  color: white;
}

.btn-dark:hover {
  opacity: 0.92;
}

@media (max-width: 992px) {
  h1 {
    font-size: 42px;
  }

  .tool-grid,
  .gpt-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .hero {
    min-height: auto;
    padding: 60px 0;
  }

  h1 {
    font-size: 34px;
  }

  .subtitle {
    font-size: 18px;
  }

  .section-heading h2 {
    font-size: 30px;
  }

  .tool-card h3,
  .gpt-card h3 {
    font-size: 24px;
  }

  .tool-card p,
  .gpt-card p {
    font-size: 17px;
  }
}