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

:root {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --accent: #6c8ebf;
  --text: #e8e8e8;
  --muted: #888;
  --max-w: 700px;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
}

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.tagline {
  font-size: 1.2rem;
  color: var(--muted);
}

.btn {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.6rem 1.4rem;
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s, color 0.2s;
}

.btn:hover {
  background: var(--accent);
  color: #fff;
}

/* Sections */
section {
  padding: 5rem 0;
  border-top: 1px solid #222;
}

h2 {
  font-size: 1.6rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--accent);
}

p {
  color: var(--text);
  max-width: 60ch;
}

.placeholder {
  color: var(--muted);
  font-style: italic;
}

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

a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  border-top: 1px solid #222;
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}