:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --accent-color: #38bdf8;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  padding-bottom: 2rem;
}

/* Header & Nav */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 5%;
  background-color: #0d1322;
  border-bottom: 1px solid #334155;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 1px;
}

.logo span {
  color: var(--accent-color);
}

nav {
  display: flex;
  gap: 0.5rem;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-btn:hover, .nav-btn.active {
  color: var(--text-main);
  background-color: #1e293b;
}

/* Hero Section */
.hero-container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 5%;
}

.hero-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 2.5rem;
  border-left: 5px solid var(--accent-color);
}

.hero-card h1 {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.hero-card a {
  color: var(--text-main);
  text-decoration: none;
}

.hero-card a:hover {
  color: var(--accent-color);
}

/* Grid Layout */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
}

main h2 {
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
  color: var(--text-muted);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.news-card {
  background-color: var(--card-bg);
  border-radius: 10px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid #334155;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.news-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-color);
}

.news-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.news-card h3 a {
  color: var(--text-main);
  text-decoration: none;
}

.meta-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 4rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}