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

:root {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-border: #334155;
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-text: #f1f5f9;
  --color-muted: #94a3b8;
  --radius: 0.75rem;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  line-height: 1.6;
}

.header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.logo {
  height: 2rem;
  width: auto;
  filter: drop-shadow(0 0 8px var(--color-primary));
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.main {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary-hover);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card p, .card ul {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card ul li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.card ul li:last-child {
  border-bottom: none;
}

.stat-value {
  font-weight: 700;
  color: var(--color-primary-hover);
  font-size: 1.1rem;
}

button {
  margin-top: 1rem;
  padding: 0.6rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: var(--color-primary-hover);
}