/* ExoSeed Africa — restrained dark, single emerald accent */
:root {
  --bg: #0f172a;
  --surface: #1e2937;
  --text: #e8eef6;
  --text-secondary: #94a3b8;
  --border: #263349;
  --accent: #f9d000;
  --accent-ink: #0f172a;
  --maxw: 880px;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --z-progress: 60;
  --z-nav: 50;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Scroll progress hairline */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: var(--z-progress);
  background: transparent;
  transform-origin: 0 50%;
  transform: scaleX(0);
}

.progress span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--text);
  border-color: var(--accent);
  background-color: rgba(16, 185, 129, 0.08);
}

/* Hero */
.hero {
  padding-top: 200px;
  padding-bottom: 160px;
  text-align: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 640px;
  height: 420px;
  max-width: 100vw;
  background: radial-gradient(closest-side, rgba(249, 208, 0, 0.08), transparent);
  pointer-events: none;
}

.hero-title {
  font-family: 'Sora', 'Inter', system-ui, sans-serif;
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.02;
  margin-bottom: 36px;
  color: var(--text);
  text-wrap: balance;
}

.hero-description {
  max-width: 620px;
  margin: 0 auto;
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  line-height: 1.5;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}

.hero-cta {
  margin-top: 52px;
}

.btn {
  display: inline-block;
  padding: 15px 36px;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent-ink);
  background-color: var(--accent);
  text-decoration: none;
  border: none;
  border-radius: 999px;
  transition: transform 0.25s var(--ease-out-expo), box-shadow 0.25s ease, background-color 0.2s ease;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
  will-change: transform;
}

.btn:hover {
  background-color: #d9b400;
  color: var(--accent-ink);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.5);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: var(--text);
}

/* Responsive */
@media (max-width: 640px) {
  .hero {
    padding-top: 150px;
    padding-bottom: 110px;
  }

  .container,
  .nav-inner,
  .footer-inner {
    padding-left: 20px;
    padding-right: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}