:root {
  --bg: #ffffff;
  --card: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --primary: #0ea5e9;
  --primary-600: #0284c7;
  --secondary: #6366f1;
  --accent: #0369a1;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.6;
  font-size: 15px;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { margin: 0 0 12px; line-height: 1.25; }
p { margin: 0 0 12px; color: var(--muted); }
ul { margin: 0; padding-left: 18px; color: var(--muted); }

h1, h2, h3 { color: var(--primary); }
.site-header h1 { color: var(--secondary); }
.card h3, .stat h3 { color: var(--accent); }
strong, b { color: var(--accent); }

.colorful-text h1,
.colorful-text h2,
.colorful-text h3,
.colorful-text .stat h3,
.colorful-text .card h3,
.colorful-text strong,
.colorful-text b {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
}
.site-header h1 { font-size: 18px; text-align: center; width: 100%; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.nav a {
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 14px;
  background: rgba(2, 6, 23, 0.04);
}
.nav a:hover { background: var(--card); }

.hero {
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(600px 200px at 20% 10%, rgba(47, 111, 237, 0.12), transparent 60%),
    radial-gradient(400px 160px at 80% 20%, rgba(35, 197, 158, 0.12), transparent 60%);
}
.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 36px 20px;
}
.hero h2 { font-size: 22px; }
.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}
.hero-card ul { margin-top: 8px; }
.hero-actions { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 12px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform .05s ease, background .2s ease, color .2s ease, border-color .2s ease;
  color: var(--text);
}
.button:hover { transform: translateY(-1px); border-color: #2a3752; }
.button.primary { background: var(--primary); border-color: var(--primary-600); color: #ffffff; }
.button.primary:hover { background: var(--primary-600); }
.button.ghost { background: transparent; }
.button.small { padding: 8px 12px; font-size: 14px; }

.section { padding: 36px 0; }
.section-alt { background: linear-gradient(180deg, rgba(241, 245, 249, 0.6), rgba(241, 245, 249, 0)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.stats {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
}
.stat h3 { font-size: 22px; }
.grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 16px 20px;
}
.card h3 { font-size: 18px; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.contact-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.contact-form input, .contact-form textarea {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(47, 111, 237, 0.2);
}
.contact-form textarea { grid-column: span 1; }
.contact-form button { grid-column: span 1; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}
.footer-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.credit-badge {
  display: inline-block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--muted);
}

@media (min-width: 480px) {
  body { font-size: 16px; }
  .site-header h1 { font-size: 20px; }
  .hero h2 { font-size: 26px; }
}

@media (min-width: 768px) {
  .header-content { flex-direction: row; align-items: center; justify-content: space-between; }
  .site-header h1 { text-align: left; width: auto; }
  .nav { justify-content: flex-end; }
  .hero-content { grid-template-columns: 1.2fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-form { grid-template-columns: 1fr 1fr; }
  .contact-form textarea, .contact-form button { grid-column: span 2; }
  .footer-content { flex-direction: row; justify-content: space-between; }
}

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