:root {
  --bg-main: #050b16;
  --bg-block: #0b1528;
  --accent: #3b82f6;
  --text-main: #e5e7eb;
  --text-muted: #94a3b8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Kanit', sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
  line-height: 1.75;
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    radial-gradient(circle at top, rgba(59,130,246,0.25), transparent 50%),
    linear-gradient(180deg, #050b16, #020617);
}

.hero-inner h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.hero-tagline {
  font-size: 1.4rem;
  margin-top: 1rem;
}

.hero-line {
  width: 80px;
  height: 3px;
  background: var(--accent);
  margin: 2rem auto;
}

.hero-sub {
  color: var(--text-muted);
}

/* LAYOUT */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 4rem 1.5rem;
}

.block {
  background: var(--bg-block);
  padding: 3rem;
  border-radius: 12px;
  margin-bottom: 3rem;
}

.block.highlight {
  border-left: 4px solid var(--accent);
}

/* TEXT */
h2 {
  font-size: 2rem;
  margin-bottom: 1.2rem;
  color: var(--accent);
}

h3 {
  margin-bottom: 0.6rem;
}

.muted {
  color: var(--text-muted);
}

/* GRID */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #020617;
  padding: 1.8rem;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.05);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}