:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --card-bg: #111827;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.15);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #1f2937;
  --danger: #ef4444;
  --radius: 10px;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.45);
  --max-width: 1100px;
  --transition: 0.2s ease;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  background: radial-gradient(circle at top, #111827 0, #020617 55%, #000 100%);
  color: var(--text);
}
/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section {
  padding: 4rem 0;
}
.section.alt {
  background: rgba(15, 23, 42, 0.7);
}
.section-title {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}
.section-intro {
  max-width: 650px;
  color: var(--muted);
  margin-bottom: 2rem;
}
/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.7), transparent);
  border-bottom: 1px solid rgba(31, 41, 55, 0.8);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}
.logo {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 1rem;
}
.logo span {
  color: var(--accent);
}
.logo-img {
  height: 30px;
  width: auto;
  vertical-align: middle;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  position: relative;
  padding-bottom: 0.15rem;
  transition: color var(--transition);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover {
  color: var(--text);
}
.nav-links a:hover::after {
  width: 100%;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0.25rem 0.5rem;
  font-size: 1.1rem;
}
/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
}
.hero-content {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.3fr);
  gap: 2.5rem;
  align-items: center;
}
.hero-text h1 {
  font-size: 2.4rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.hero-text p {
  color: var(--muted);
  max-width: 600px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 0.75rem;
}
.hero-note {
  font-size: 0.9rem;
  color: var(--muted);
}
.hero-card {
  background: radial-gradient(circle at top left, #1f2937, #020617);
  border-radius: 16px;
  padding: 1.75rem 1.5rem;
  border: 1px solid rgba(55, 65, 81, 0.9);
  box-shadow: var(--shadow-soft);
}
.hero-card h2 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
}
.hero-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
}
.hero-card li::before {
  content: "•";
  color: var(--accent);
  margin-right: 0.4rem;
}
.hero-card li {
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}
.hero-card p {
  color: var(--muted);
  font-size: 0.9rem;
}
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.6rem 1.3rem;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.1s ease;
}
.btn.primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #f9fafb;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.45);
}
.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(37, 99, 235, 0.6);
}
.btn.secondary {
  background: rgba(15, 23, 42, 0.8);
  color: var(--text);
  border-color: rgba(55, 65, 81, 0.9);
}
.btn.secondary:hover {
  background: rgba(31, 41, 55, 0.9);
}
.btn.full {
  width: 100%;
}
/* Cards & grids */
.grid {
  display: grid;
  gap: 1.75rem;
  margin-top: 2rem;
}
.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--border);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.35);
}
.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}
.card p {
  color: var(--muted);
  font-size: 0.95rem;
}
.card-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0.5rem;
}
.card-list li {
  font-size: 0.93rem;
  margin-bottom: 0.25rem;
}
.card-list li::before {
  content: "▹";
  color: var(--accent);
  margin-right: 0.4rem;
}
.card-footnote {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.75rem;
}
/* Highlight box */
.highlight-box {
  margin-top: 2.5rem;
  padding: 1.5rem 1.4rem;
  border-radius: var(--radius);
  border: 1px dashed rgba(59, 130, 246, 0.7);
  background: var(--accent-soft);
}
.highlight-box h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}
.highlight-box p {
  color: var(--text);
  margin-bottom: 1rem;
}
/* Checklist */
.checklist {
  list-style: none;
  padding: 0;
  margin: 0;
}
.checklist li {
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}
.checklist li::before {
  content: "✔";
  color: var(--accent);
  margin-right: 0.4rem;
}
/* Contact */
.contact-form {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
}
.form-group {
  margin-bottom: 0.9rem;
}
.form-group label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.55rem 0.6rem;
  border-radius: 6px;
  border: 1px solid rgba(55, 65, 81, 0.9);
  background: #020617;
  color: var(--text);
  font-size: 0.9rem;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}
.contact-info h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}
.contact-info p {
  color: var(--muted);
  font-size: 0.95rem;
}
/* Footer */
.site-footer {
  border-top: 1px solid rgba(31, 41, 55, 0.9);
  padding: 1.5rem 0 2rem;
  background: #020617;
}
.footer-content {
  text-align: center;
}
.footer-content p {
  margin: 0.25rem 0;
  font-size: 0.85rem;
  color: var(--muted);
}
.footer-note {
  color: #6b7280;
}
/* Responsive */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: minmax(0, 1fr);
  }
.hero-card {
    order: -1;
  }
.grid.two {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }
.nav-links {
    position: absolute;
    right: 1.5rem;
    top: 3.1rem;
    flex-direction: column;
    background: #020617;
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 0.6rem 0.8rem;
    display: none;
  }
.nav-links.open {
    display: flex;
  }
.hero {
    padding-top: 3.5rem;
  }
.hero-text h1 {
    font-size: 2rem;
  }
}