/* ─── Reset CSS ─────────────────────────────────────────────────
   Tailored for Dr. Quan & Associates static site.
   Loaded before style.css on every page.
──────────────────────────────────────────────────────────────── */

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

/* 2. Root defaults */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  tab-size: 4;
}

/* 3. Body */
body {
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 4. Typography */
h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
  line-height: 1.2;
}

p, li, blockquote {
  line-height: 1.6;
}

/* 5. Links */
a {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

/* 6. Lists */
ul, ol {
  list-style: none;
}

/* 7. Media */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
  border-style: none;
}

/* 8. Forms & interactive elements */
button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

button {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

textarea {
  resize: vertical;
}

/* 9. Tables */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* 10. Misc */
hr {
  border: none;
  border-top: 1px solid currentColor;
  opacity: 0.2;
}

/* Remove tap highlight on mobile */
a,
button,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* Hidden utility */
[hidden] {
  display: none !important;
}