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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Arial, sans-serif;
  background: #f9fafb;
  color: #111827;
  line-height: 1.6;
}

/* Layout */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 24px;
}

.flex {
  display: flex;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Typography */
h1 {
  font-size: 2.25rem;
  font-weight: 700;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: #6b7280;
  font-size: 0.95rem;
}

/* Cards */
.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 20px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-size: 0.9rem;
  text-decoration: none;
}

.btn-primary {
  background: #111;
  color: #fff;
}

.btn-outline {
  border: 1px solid #111;
  color: #111;
}

/* Spacing helpers */
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-10 { margin-top: 40px; }
.mb-4 { margin-bottom: 16px; }

/* Footer */
footer {
  border-top: 1px solid #e5e7eb;
  margin-top: 60px;
  padding: 20px;
  font-size: 0.85rem;
  color: #6b7280;
}