/**
 * Main Stylesheet
 * Pricetag.co.za - Enterprise E-commerce Platform
 *
 * Mobile-first, clean, tech-confident design.
 */

/* Import design system tokens */
@import url('design-system.css');

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* =========================================================================
   CSS RESET & BASE
   ========================================================================= */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  scrollbar-gutter: stable;
}

main {
  flex: 1;
}

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

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

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

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

/* =========================================================================
   UTILITY CLASSES
   ========================================================================= */

/* Container */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-inline: var(--space-6);
  }
}

/* Visually hidden (accessible) */
.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;
}

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

.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }

.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }

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

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.py-4 { padding-block: var(--space-4); }
.py-6 { padding-block: var(--space-6); }
.py-8 { padding-block: var(--space-8); }
.py-12 { padding-block: var(--space-12); }
.py-16 { padding-block: var(--space-16); }

/* Flexbox utilities */
.flex { display: flex; }
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.flex-shrink-0 { flex-shrink: 0; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Responsive flex utilities */
@media (min-width: 640px) {
  .sm\:flex-row { flex-direction: row; }
}

@media (min-width: 1024px) {
  .lg\:flex-row { flex-direction: row; }
  .lg\:w-64 { width: 16rem; }
  .lg\:w-72 { width: 18rem; }
  .lg\:w-80 { width: 20rem; }
}

/* Grid utilities */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* =========================================================================
   BUTTONS
   ========================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--button-padding-y) var(--button-padding-x);
  font-size: var(--text-sm);
  font-weight: var(--button-font-weight);
  line-height: 1;
  border-radius: var(--button-radius);
  transition: var(--transition-all);
  white-space: nowrap;
  cursor: pointer;
  border: var(--border-2) solid transparent;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary button */
.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--color-primary-700);
  color: #ffffff;
}

.btn-primary:active {
  background-color: var(--color-primary-800);
  color: #ffffff;
}

/* Secondary button */
.btn-secondary {
  background-color: var(--color-background-elevated);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-background-hover);
  border-color: var(--color-neutral-500);
}

/* Outline button */
.btn-outline {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-outline:hover {
  background-color: var(--color-background-alt);
  border-color: var(--color-neutral-300);
}

/* Ghost button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
}

.btn-ghost:hover {
  background-color: var(--color-background-hover);
}

/* Accent button */
.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-neutral-900);
}

.btn-accent:hover {
  background-color: var(--color-accent-600);
}

/* Danger button */
.btn-danger {
  background-color: var(--color-danger);
  color: var(--color-text-inverse);
}

.btn-danger:hover {
  background-color: var(--color-danger-600);
}

/* Button sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* Full width button */
.btn-block {
  width: 100%;
}

/* Icon button */
.btn-icon {
  padding: var(--space-3);
  width: var(--input-height);
  height: var(--input-height);
}

.btn-icon.btn-sm {
  width: var(--input-height-sm);
  height: var(--input-height-sm);
  padding: var(--space-2);
}

/* Loading state */
.btn.is-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-primary.is-loading::after {
  border-color: var(--color-text-inverse);
  border-right-color: transparent;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* =========================================================================
   FORM ELEMENTS
   ========================================================================= */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.form-label.required::after {
  content: '*';
  color: var(--color-danger);
  margin-left: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  height: var(--input-height);
  padding: 0 var(--input-padding-x);
  font-size: var(--text-base);
  background-color: var(--input-background);
  border: var(--border-1) solid var(--input-border-color);
  border-radius: var(--input-border-radius);
  transition: var(--transition-colors), box-shadow var(--duration-150) var(--ease-in-out);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--input-border-color-focus);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-input.is-invalid,
.form-select.is-invalid,
.form-textarea.is-invalid {
  border-color: var(--color-danger);
}

.form-input.is-invalid:focus {
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.1);
}

.form-textarea {
  height: auto;
  min-height: 120px;
  padding: var(--space-3) var(--input-padding-x);
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%23a1a1aa' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3E%3C/svg%3E");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 20px;
  padding-right: var(--space-10);
}

.form-error {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-danger);
}

.form-hint {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Price Range Slider */
.price-range-slider {
  position: relative;
  height: 6px;
  margin: 20px 0;
}

.price-range-track {
  position: absolute;
  width: 100%;
  height: 6px;
  background: var(--color-background-elevated);
  border-radius: 3px;
}

.price-range-progress {
  position: absolute;
  height: 6px;
  background: var(--color-primary);
  border-radius: 3px;
}

.price-range-input {
  position: absolute;
  width: 100%;
  height: 6px;
  top: 0;
  margin: 0;
  pointer-events: none;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
}

.price-range-input::-webkit-slider-thumb {
  pointer-events: auto;
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border: 3px solid #fff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: transform 0.15s ease;
}

.price-range-input::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.price-range-input::-moz-range-thumb {
  pointer-events: auto;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border: 3px solid #fff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

.price-range-values {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.form-check-input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--text-sm);
  cursor: pointer;
}

/* =========================================================================
   CARDS
   ========================================================================= */

.card {
  background-color: var(--color-background-elevated);
  border: var(--border-1) solid var(--color-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}

.card-header {
  padding: var(--space-4) var(--card-padding);
  border-bottom: var(--border-1) solid var(--color-border-light);
}

.card-body {
  padding: var(--card-padding);
}

.card-footer {
  padding: var(--space-4) var(--card-padding);
  border-top: var(--border-1) solid var(--color-border-light);
  background-color: var(--color-background-alt);
}

/* =========================================================================
   BADGES
   ========================================================================= */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--badge-padding-y) var(--badge-padding-x);
  font-size: var(--badge-font-size);
  font-weight: var(--font-semibold);
  line-height: 1;
  border-radius: var(--badge-radius);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.badge-primary {
  background-color: rgba(139, 43, 43, 0.2);
  color: var(--color-primary-400);
}

.badge-success {
  background-color: rgba(34, 197, 94, 0.15);
  color: var(--color-success-500);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.15);
  color: var(--color-warning-500);
}

.badge-danger {
  background-color: rgba(239, 68, 68, 0.15);
  color: var(--color-danger-500);
}

.badge-accent {
  background-color: rgba(236, 72, 153, 0.15);
  color: var(--color-accent-500);
}

.badge-neutral {
  background-color: var(--color-background-hover);
  color: var(--color-text-secondary);
}

/* Solid badges */
.badge-solid-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.badge-solid-danger {
  background-color: var(--color-danger);
  color: var(--color-text-inverse);
}

.badge-solid-accent {
  background-color: var(--color-accent);
  color: var(--color-neutral-900);
}

/* =========================================================================
   ALERTS
   ========================================================================= */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: var(--border-1) solid;
  margin-bottom: var(--space-4);
}

.alert-success {
  background-color: var(--color-success-50);
  border-color: var(--color-success-200);
  color: var(--color-success-700);
}

.alert-warning {
  background-color: var(--color-warning-50);
  border-color: var(--color-warning-200);
  color: var(--color-warning-600);
}

.alert-danger {
  background-color: var(--color-danger-50);
  border-color: var(--color-danger-200);
  color: var(--color-danger-700);
}

.alert-info {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-200);
  color: var(--color-primary-700);
}

/* =========================================================================
   LOADING STATES
   ========================================================================= */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-background-elevated) 25%,
    var(--color-background-hover) 50%,
    var(--color-background-elevated) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-neutral-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* =========================================================================
   TRANSITIONS & ANIMATIONS
   ========================================================================= */

.fade-in {
  animation: fadeIn var(--duration-300) var(--ease-out);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.slide-up {
  animation: slideUp var(--duration-300) var(--ease-out);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scale-in {
  animation: scaleIn var(--duration-200) var(--ease-out);
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Counter animation */
.count-animate {
  animation: countPop var(--duration-300) var(--ease-bounce);
}

@keyframes countPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

/* =========================================================================
   RESPONSIVE VISIBILITY
   ========================================================================= */

.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: block;
  }

  .hide-desktop {
    display: none;
  }
}

/* =========================================================================
   ACCESSIBILITY
   ========================================================================= */

/* Focus visible for keyboard navigation */
:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --color-border: var(--color-neutral-400);
    --shadow-sm: none;
    --shadow-md: none;
  }
}

/* =========================================================================
   PRINT STYLES
   ========================================================================= */

@media print {
  body {
    background: white;
    color: black;
  }

  .no-print {
    display: none !important;
  }

  a[href]::after {
    content: ' (' attr(href) ')';
  }
}