/* =================================================================
   Base styles — Reset, body, scrollbar, PWA native-feel
   ================================================================= */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font: var(--md-sys-typescale-body-large);
  background: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  min-height: 100vh;
  overflow-x: hidden;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
}

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

/* iOS native-feel: disable long-press and text selection on UI elements */
.sidebar, .topbar, .bottom-nav, .nav-item, .btn, .icon-btn, .toggle-switch {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--md-sys-color-outline-variant);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--md-sys-color-outline);
}

/* Selection */
::selection {
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* Material icons sizing */
.material-icons-round,
.material-symbols-rounded {
  font-size: 20px;
  line-height: 1;
  vertical-align: middle;
}

/* Offline toast */
.offline-toast {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-120%);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
  border-radius: var(--radius-xl);
  font: var(--md-sys-typescale-label-large);
  z-index: 10000;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.offline-toast.visible {
  transform: translateX(-50%) translateY(0);
}