* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.2;
  font-weight: 600;
}

p {
  margin: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: rgb(0 0 0 / 30%);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-control);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.container {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-12);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.stack-lg {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.section {
  margin-top: var(--space-8);
}

.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.section__hint {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--space-6) var(--space-4);
  text-align: center;
}

.footer__note {
  margin-top: var(--space-1);
  opacity: 0.8;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}