/* ==========================================================================
   NEARBY CHAT — BASE STYLES & RESET
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-app);
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Chat Page Viewport Lock: Eliminates double-scroll and keeps composer pinned */
body.is-chat-page {
  height: 100vh;
  height: 100dvh;
  min-height: 0;
  max-height: 100dvh;
  overflow: hidden;
}

@media (max-width: 767px) {
  body.is-chat-page {
    position: fixed;
    inset: 0;
    width: 100%;
  }
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }

p {
  color: var(--text-secondary);
}

/* Screen reader only helper */
.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 visibility for accessibility */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}