:root {
  --bg: #050608;
  --bg-alt: #111522;
  --fg: #f5f5f5;
  --accent: #ff7a18;
  --accent-soft: rgba(255, 122, 24, 0.15);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: radial-gradient(circle at top, #171b2f 0, #050608 45%, #000 100%);
  color: var(--fg);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(5, 6, 8, 0.9), rgba(5, 6, 8, 0.7));
  border-bottom: 1px solid var(--border-subtle);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}

.logo {
  font-size: 1.1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.main-nav a {
  margin-left: 1rem;
  font-size: 0.95rem;
  opacity: 0.9;
}
.main-nav a:hover {
  opacity: 1;
}

/* Hero */

.hero {
  padding: 6rem 0 4rem;
}

.hero h2 {
  font-size: clamp(2.3rem, 4vw, 3rem);
  margin-bottom: 0.75rem;
}

.hero p {
  max-width: 32rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  margin-top: 1.75rem;
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #ff7a18, #af002d 70%);
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.85rem;
  border: none;
}
.btn:hover {
  filter: brightness(1.1);
  text-decoration: none;
}

/* Sections */

.section {
  padding: 3.5rem 0;
  background: transparent;
}

.section-alt {
  background: radial-gradient(circle at top left, var(--accent-soft), transparent 60%);
}

.section h2 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
}

/* Cards */

.card-grid {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.card {
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: rgba(8, 10, 18, 0.9);
  border: 1px solid var(--border-subtle);
}
.card h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}
.card p {
  margin: 0;
  opacity: 0.9;
}

/* Timeline */

.timeline {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-left: 2px solid var(--border-subtle);
}
.timeline li {
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
}
.timeline-date {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  opacity: 0.75;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 1.75rem 0 2rem;
  font-size: 0.85rem;
  opacity: 0.85;
}

/* Responsive */

@media (max-width: 640px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
  .main-nav {
    display: flex;
    flex-wrap: wrap;
  }
  .main-nav a {
    margin: 0.25rem 0.75rem 0.25rem 0;
  }
}