tml {
  box-sizing: border-box;
  font-size: 16px;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  padding: 0;
  background: #0B0E13;
  color: #E5E7EB;
  font-family: "Inter", system-ui, -apple-system, Arial, sans-serif;
  line-height: 1.6;
}

/* Comfort / Large Text Mode */
body.large-text {
  font-size: 1.1rem;
}

/* Layout */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

/* Semantics */
main {
  display: block;
}

/* Typography */
h1, h2, h3 {
  font-weight: 600;
  letter-spacing: 0.4px;
}

h1 {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

h2 {
  font-size: 1.8rem;
  margin-top: 28px;
}

h3 {
  font-size: 1.3rem;
  margin-top: 18px;
}

p {
  margin-top: 10px;
  color: #D1D5DB;
}

.section {
  margin-top: 32px;
  padding-top: 12px;
  border-top: 1px solid #1F2937;
}

.callout {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid #1F2937;
  padding: 14px 16px;
  border-radius: 10px;
  margin-top: 12px;
}

/* Columns */
.columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 16px;
}

.columns div {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid #1F2937;
  border-radius: 10px;
  padding: 14px;
}

/* Responsive */
@media (max-width: 768px) {
  .columns {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }
}

/* Links and Focus Styles */
a {
  color: #93C5FD;
  text-decoration: none;
}

a:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid #FBBF24;
  outline-offset: 2px;
}

/* Buttons */
button {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid #1F2937;
  background: #111827;
  color: #E5E7EB;
  cursor: pointer;
}

button:hover {
  background: #1F2937;
}

/* Header + Footer */
header {
  border-bottom: 1px solid #1F2937;
  padding: 10px 0;
}

.nav-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

nav[role="navigation"] {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.nav-left a {
  color: #9CA3AF;
  font-size: 0.95rem;
}

.nav-left a:hover {
  color: #FFFFFF;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Footer */
footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid #1F2937;
  text-align: center;
  color: #6B7280;
  font-size: 0.9rem;
}

/* Utility text */
.small-text {
  font-size: 0.9rem;
  color: #9CA3AF;
}