/* Base */
* { box-sizing: border-box; }

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #0f172a;
  color: #f1f5f9;
  line-height: 1.6;
}

a { color: inherit; }

/* Layout */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 28px 20px;
  flex: 1 0 auto;
  width: 100%;
}

.hero {
  min-height: calc(100vh - 120px); /* header+footer space */
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  margin: 0 0 10px;
}

p {
  font-size: 1.1rem;
  color: #cbd5e1;
  margin: 0;
}

/* Button */
.btn {
  display: inline-block;
  margin: 22px auto 0;
  padding: 12px 24px;
  background-color: #38bdf8;
  color: #0f172a;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: 0.2s ease;
}

.btn:hover {
  background-color: #0ea5e9;
}

/* Header + Nav */
.site-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  flex: 0 0 auto;
}

.nav {
  max-width: 900px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav__brand {
  text-decoration: none;
  font-weight: bold;
}

.nav__links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.nav__links a {
  text-decoration: none;
  color: rgba(241, 245, 249, 0.85);
}

.nav__links a:hover {
  color: #ffffff;
  text-decoration: underline;
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: #64748b;
  text-align: center;
  padding: 18px 20px;
  flex: 0 0 auto;
}