/*
  NexiThera website styles
  Inspired by biotech and AI ventures, blending greens for life sciences
  and purples for advanced technology. Use modern, readable typography
  with ample whitespace and responsive design.
*/

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: #f3f4f6;
  background-color: #0f172a;
}

a { text-decoration: none; color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #34d399;
  color: #0f172a;
  padding: 0.5rem 0.75rem;
  border-radius: 0 0 0.25rem 0.25rem;
  z-index: 300;
}

.skip-link:focus { left: 1rem; }

.container { width: 90%; max-width: 1100px; margin: auto; }

.navbar {
  position: sticky; top: 0; width: 100%;
  background-color: rgba(15, 23, 42, 0.95);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  z-index: 100;
}

.nav-container {
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; padding: 1rem 0; flex-wrap: wrap;
}

.logo { font-size: 1.8rem; font-weight: bold; color: #34d399; display: inline-flex; align-items: center; gap: 0.5rem; }
.logo-mark { width: 1.8rem; height: 1.8rem; display: inline-block; }

.nav-links { list-style: none; display: flex; gap: 1.2rem; flex-wrap: wrap; }
.nav-links a { color: #c4d2f5; font-size: 1rem; transition: color 0.3s ease; }
.nav-links a:hover { color: #8b5cf6; }

.hero {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.8), rgba(139, 92, 246, 0.8));
  padding: 5rem 0; text-align: center; color: #0f172a;
}
.hero h1 { font-size: 2.8rem; margin-bottom: 1rem; font-weight: 700; }
.hero p { font-size: 1.2rem; margin-bottom: 2rem; max-width: 700px; margin-left: auto; margin-right: auto; }

.btn-primary {
  padding: 0.8rem 2rem; background-color: #8b5cf6; color: #ffffff;
  border-radius: 9999px; font-weight: 500; transition: background-color 0.3s ease;
}
.btn-primary:hover { background-color: #7c3aed; }

.section { padding: 4rem 0; }
.section h2 { font-size: 2rem; margin-bottom: 1.5rem; color: #34d399; text-align: center; }
.section p { font-size: 1rem; color: #dbeafe; margin-bottom: 1rem; line-height: 1.6; }

.about { background-color: #14213d; }
.platform, .news, .careers, .contact, .legal { background-color: #1e293b; }
.programs { background-color: #14213d; }

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

.platform-item, .program-list li {
  background-color: #14213d; padding: 1.5rem; border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.platform-item h3 { color: #8b5cf6; margin-bottom: 0.5rem; font-size: 1.2rem; }
.program-list h4 { color: #34d399; margin-bottom: 0.5rem; font-size: 1.2rem; }
.news p, .careers p, .contact p, .legal p { text-align: center; }
.contact a { color: #8b5cf6; text-decoration: underline; }

.footer {
  background-color: #0f172a; padding: 2rem 0; text-align: center;
  color: #94a3b8; font-size: 0.9rem; border-top: 1px solid #1e293b;
}
.footer a { color: #8b5cf6; margin: 0 0.5rem; transition: color 0.3s ease; }
.footer a:hover { color: #a78bfa; }

@media (min-width: 768px) {
  .hero h1 { font-size: 3.5rem; }
  .hero p { font-size: 1.25rem; }
  .logo { font-size: 2rem; }
}