:root {
  --bg-color: #0d0d0d;
  --bg-color-soft: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --spotify-green: #1DB954;
  --spotify-green-hover: #1ed760;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
}

header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.5rem 2rem;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(12px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo img {
  width: 32px;
  height: 32px;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav a:hover, nav a.active {
  color: var(--text-primary);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8rem 2rem 4rem;
}

section {
  padding: 6rem 0;
  text-align: center;
}

.hero {
  padding: 10rem 0 6rem;
}

.association-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(29, 185, 84, 0.1);
  color: var(--spotify-green);
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2rem;
  border: 1px solid rgba(29, 185, 84, 0.2);
}

.hero h1 {
  font-size: 4.5rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--spotify-green);
  color: #000;
  padding: 1rem 2rem;
  border-radius: 30px;
  font-weight: 600;
  text-decoration: none;
  font-size: 1.1rem;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.cta-button:hover {
  background-color: var(--spotify-green-hover);
  transform: translateY(-2px);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.features, .tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card, .tech-card {
  background: var(--bg-color-soft);
  padding: 3rem 2rem;
  border-radius: 20px;
  transition: transform 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.feature-card:hover, .tech-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.1);
}

.feature-icon {
  color: var(--spotify-green);
  margin-bottom: 1.5rem;
}

.feature-card h3, .tech-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.feature-card p, .tech-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

footer {
  text-align: center;
  padding: 3rem 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  margin-top: 4rem;
}

footer a {
  color: var(--spotify-green);
  text-decoration: none;
}

/* Animations */
.reveal-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  will-change: opacity, transform;
}

body.has-animations .reveal-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-section {
    transition: none;
    opacity: 1;
    transform: none;
  }
}