:root {
  --bg:      #1a1a2e;
  --card-bg: #16213e;
  --accent:  #4ade80;
  --text:    #e2e8f0;
  --muted:   #94a3b8;
  --border:  #2d3748;
}

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

body {
  font-family: 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 3rem 1.5rem;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

h1 {
  font-size: 2rem;
  color: var(--accent);
}

h2 {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

h3 {
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 1rem;
  margin-bottom: 0.4rem;
}

section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

p { line-height: 1.7; font-size: 0.95rem; }

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

.muted { color: var(--muted); }
.small { font-size: 0.8rem; }

.back {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.2s;
  align-self: flex-start;
}
.back:hover { opacity: 0.8; text-decoration: none; }