/**
 * Base Styles - Henson Engineering Timesheet PWA
 * Reset, typography, and layout primitives.
 */

/* ============================================================================
   CSS Reset
   ============================================================================ */

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

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-height: 100%;
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-app);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

/* Allow text selection in inputs but not elsewhere (kiosk mode) */
body {
  -webkit-touch-callout: none;
  user-select: none;
}

input, textarea, [contenteditable] {
  -webkit-touch-callout: default;
  user-select: text;
}

/* Prevent overscroll bounce on iOS */
html, body {
  overscroll-behavior: none;
}

/* ============================================================================
   Typography
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

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

a:hover {
  text-decoration: underline;
}

strong, b {
  font-weight: var(--font-semibold);
}

small {
  font-size: var(--text-sm);
}

/* ============================================================================
   Layout Primitives
   ============================================================================ */

/* Full viewport app container */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh; /* Dynamic viewport height for mobile */
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}

/* Screen container */
#screen-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Base screen layout */
.screen {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--content-padding);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  animation: screenFadeIn 0.2s ease-out;
}

@keyframes screenFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Content wrapper for max-width constraint */
.screen-content {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

/* Text alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Text colors */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-brand { color: var(--brand-gold); }

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }

/* Spacing utilities */
.mt-auto { margin-top: auto; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Width utilities */
.w-full { width: 100%; }

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

/* Hide scrollbar but allow scrolling */
.hide-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.hide-scrollbar::-webkit-scrollbar {
  display: none;
}

/* ============================================================================
   Focus Styles
   ============================================================================ */

:focus {
  outline: none;
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ============================================================================
   Reduced Motion
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}