/* Base styles: reset, typography, focus, form controls, motion preferences. */

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

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--line-height);
}

h1,
h2,
h3,
p,
ul,
ol,
figure {
  margin: 0;
}

h1 {
  font-size: var(--text-xl);
  line-height: var(--line-height-tight);
}

h2 {
  font-size: var(--text-lg);
  line-height: var(--line-height-tight);
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

code,
kbd,
pre,
.mono {
  font-family: var(--font-mono);
}

a {
  color: var(--color-accent);
}

/* Focus: visible for keyboard users only, at least 3:1 against both surfaces. */
:focus {
  outline: none;
}

:focus-visible {
  outline: var(--focus-ring-width) solid var(--color-focus);
  outline-offset: 2px;
}

/* Hidden visually but read by screen readers. */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

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

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--touch-target);
  min-width: var(--touch-target);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

button:hover {
  border-color: var(--color-accent);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.button--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-contrast);
}

input,
select,
textarea {
  min-height: var(--touch-target);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

/* Plain messages: loading, not built yet, unsupported browser. */
.notice {
  max-width: 40rem;
  margin: var(--space-6) auto;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-raised);
  display: grid;
  gap: var(--space-3);
}

.notice--unsupported {
  border-color: var(--color-danger);
}

.notice__list {
  padding-left: var(--space-5);
  display: grid;
  gap: var(--space-2);
}

@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;
  }
}