/* styles.css */
/* Premium design system */

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

:root {
  /* Color palette - deep blue gradient with teal accents */
  --primary-h: 210;   /* hue */
  --primary-s: 60%;
  --primary-l: 30%;
  --accent-h: 170;
  --accent-s: 55%;
  --accent-l: 45%;

  --bg-gradient: linear-gradient(135deg, hsl(var(--primary-h), var(--primary-s), 20%), hsl(var(--accent-h), var(--accent-s), 25%));
  --card-bg: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  --text-color: #ffffff;
  --link-color: hsl(var(--accent-h), var(--accent-s), 70%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: var(--bg-gradient);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
}

/* Navigation */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}
.nav .logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  text-decoration: none;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s;
}
.nav-links a:hover {
  color: var(--link-color);
}

/* Hero */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 80vh;
  text-align: center;
  background: var(--bg-gradient);
}
.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}
.hero-content .tagline {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  opacity: 0.9;
}
.cta-button {
  padding: 0.8rem 1.6rem;
  background: var(--link-color);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s, transform 0.2s;
}
.cta-button:hover {
  background: hsl(var(--accent-h), var(--accent-s), 55%);
  transform: translateY(-2px);
}

/* Card Sections */
.section {
  max-width: 800px;
  margin: 2rem auto;
  padding: 2rem;
  border-radius: 12px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--card-shadow);
  border: 1px solid rgba(255,255,255,0.1);
}
.section h2 {
  margin-bottom: 1rem;
  font-size: 2rem;
  color: var(--link-color);
}
.section ul,
.section ol {
  margin-left: 1.5rem;
}
.section a {
  color: var(--link-color);
  text-decoration: underline;
}

/* Footer */
.footer {
  text-align: center;
  padding: 1rem;
  opacity: 0.7;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2.2rem;
  }
  .nav {
    flex-direction: column;
    gap: 0.5rem;
  }
  .nav-links {
    flex-direction: column;
    gap: 0.5rem;
  }
}