* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-color-1);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 600;
  letter-spacing: -0.02em;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* Allow text selection in chat messages and input boxes */
.chat-messages .msg-content,
.profile-edit-form input,
.profile-edit-form textarea,
.auth-card input,
.url-bar-section input,
.chat-input-bar textarea,
.palette-header input {
  user-select: text;
}

/* Custom Scrollbar - Slim & Modern */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Noise overlay config */
.noise-overlay {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23noise)' opacity='0.025'/%3E%3C/svg%3E");
  opacity: 1;
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: overlay;
}

/* Base structural setups for PWA iOS bounce fixes */
body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  /* Safe area insets for notched iPhones */
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

/* Font size preferences scaling */
body.font-size-small .msg-content {
  font-size: 0.825rem;
}

body.font-size-normal .msg-content {
  font-size: 0.93rem;
}

body.font-size-large .msg-content {
  font-size: 1.05rem;
}

/* Reduced Motion overrides */
body.reduced-motion *,
body.reduced-motion *::before,
body.reduced-motion *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
  scroll-behavior: auto !important;
}