:root {
  --green-50: #f0fdf4;
  --green-100: #dcfce7;
  --green-600: #16a34a;
  --green-700: #15803d;
  --green-800: #166534;
  --green-900: #14532d;
  --amber-50: #fffbeb;
  --amber-100: #fef3c7;
  --amber-600: #d97706;
  --amber-700: #b45309;
  --red-50: #fef2f2;
  --red-100: #fee2e2;
  --red-600: #dc2626;
  --blue-50: #eff6ff;
  --blue-100: #dbeafe;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--gray-800);
  line-height: 1.6;
  background: #fff;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  border-bottom: 1px solid var(--gray-200);
  padding: 1rem 0;
  background: var(--gray-50);
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--green-800);
}

header h1 a {
  color: inherit;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1.25rem;
}

nav a {
  color: var(--gray-600);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

nav a:hover,
nav a.active {
  color: var(--green-700);
}

/* Hero */
.hero {
  padding: 3rem 0;
  text-align: center;
}

.hero h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.1rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.install-box {
  display: inline-block;
  background: var(--gray-900);
  color: #a5f3fc;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.15s;
}

.card:hover {
  border-color: var(--green-600);
}

.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--gray-900);
}

.card p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 1rem;
}

.card a {
  font-size: 0.9rem;
  color: var(--green-700);
  text-decoration: none;
  font-weight: 600;
}

.card a:hover {
  text-decoration: underline;
}

/* Data table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--gray-200);
}

.data-table th {
  font-weight: 600;
  color: var(--gray-600);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table tbody tr:hover {
  background: var(--gray-50);
}

/* Badges / pills */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-national {
  background: var(--blue-100);
  color: var(--blue-600);
}

.badge-state {
  background: var(--amber-100);
  color: var(--amber-700);
}

.badge-school {
  background: var(--green-100);
  color: var(--green-700);
}

.badge-long {
  background: var(--red-100);
  color: var(--red-600);
}

/* State selector */
.state-selector {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.state-btn {
  padding: 0.4rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: all 0.15s;
}

.state-btn:hover {
  border-color: var(--green-600);
  color: var(--green-700);
}

.state-btn.active {
  background: var(--green-700);
  color: #fff;
  border-color: var(--green-700);
}

/* Sections */
section {
  padding: 2rem 0;
}

section h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: 1.5rem 0 0.75rem;
}

section p {
  color: var(--gray-600);
  margin-bottom: 1rem;
}

/* Checklist */
.checklist-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.toggle-btn {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--gray-300);
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--gray-600);
  transition: all 0.15s;
}

.toggle-btn.on {
  background: var(--green-100);
  border-color: var(--green-600);
  color: var(--green-800);
}

.checklist-category {
  margin: 1.5rem 0;
}

.checklist-category h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 0.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--green-100);
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.35rem 0;
  font-size: 0.9rem;
}

.checklist-item input[type="checkbox"] {
  margin-top: 0.3rem;
  accent-color: var(--green-600);
}

.checklist-item .reason {
  font-size: 0.8rem;
  color: var(--amber-600);
  font-style: italic;
}

.checklist-item .essential-tag {
  font-size: 0.7rem;
  color: var(--red-600);
  font-weight: 600;
}

/* CTA */
.cta-box {
  background: var(--green-50);
  border: 1px solid var(--green-100);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  margin: 2rem 0;
}

.cta-box p {
  color: var(--gray-700);
  margin-bottom: 0.75rem;
}

.cta-box a {
  display: inline-block;
  background: var(--green-700);
  color: #fff;
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s;
}

.cta-box a:hover {
  background: var(--green-800);
}

/* Footer */
footer {
  border-top: 1px solid var(--gray-200);
  padding: 1.5rem 0;
  margin-top: 2rem;
  text-align: center;
  color: var(--gray-400);
  font-size: 0.85rem;
}

footer a {
  color: var(--green-700);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Print styles for checklist */
@media print {
  header, nav, .state-selector, .checklist-toggles, .cta-box, footer {
    display: none;
  }
  .checklist-item {
    break-inside: avoid;
  }
}

/* Responsive */
@media (max-width: 640px) {
  .hero h2 {
    font-size: 1.5rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .install-box {
    font-size: 0.85rem;
    padding: 0.6rem 1rem;
  }
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }
}