/* ============================================================
   指路教育 — CSS Reset
   Based on modern-normalize + tailored defaults for Chinese web
   ============================================================ */

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

/* Remove default margin */
body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd {
  margin: 0;
}

/* Remove list styles */
ul, ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Set core body defaults */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html:focus-within {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: var(--leading-normal);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-000);
  overflow-x: hidden;
}

/* Make images easier to work with */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
  font-style: italic;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Remove textarea resize handle unless explicit */
textarea {
  resize: vertical;
}

/* Anchor defaults */
a {
  color: inherit;
  text-decoration: none;
}

a:not([class]) {
  text-decoration-skip-ink: auto;
}

/* Table defaults */
table {
  border-collapse: collapse;
  border-spacing: 0;
  width: 100%;
}

th, td {
  text-align: left;
}

/* Form element normalization */
input, select, textarea {
  border: var(--border-thin);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  background: var(--color-neutral-000);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(43, 95, 138, 0.15);
}

/* Remove all animations for people who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Screen reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus visible styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}