:root {
  --bg: #ffffff;
  --bg-soft: #f8f9fa;
  --text: #1a1a1a;
  --text-muted: #555555;
  --border: #e5e5e5;
  --accent: #2c6bed;
  --accent-hover: #1a56d6;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========== NAVBAR ========== */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg);
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.logo {
  color: var(--text);
  font-size: 1.4rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.3px;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent);
  background-color: var(--bg-soft);
}

/* ========== HERO ========== */
.hero {
  background-color: var(--bg-soft);
  text-align: center;
  padding: 4.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.6rem;
  font-weight: 700;
  color: var(--accent);
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
}

/* ========== CONTENT ========== */
.content {
  max-width: 900px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
  flex: 1;
}

/* ========== FOOTER ========== */
footer {
  background-color: var(--bg);
  color: var(--text-muted);
  text-align: center;
  padding: 1.5rem;
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
  user-select: none;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 600px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.9rem;
  }
}