/* ================================================
   ACERO SHOP V2 - GLOBAL STYLES
   ================================================
   Base reset, typography defaults, utility base,
   and global element styling.
   Mobile First. All pages depend on this file.
   ================================================ */

/* ============================================
   CSS RESET
   ============================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

/* ============================================
   BODY DEFAULTS
   ============================================ */

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: #F5F5F5;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* ============================================
   TYPOGRAPHY DEFAULTS
   ============================================ */

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

h1 { font-size: var(--font-size-heading-1); }
h2 { font-size: var(--font-size-heading-2); }
h3 { font-size: var(--font-size-heading-3); }
h4 { font-size: 16px; }
h5 { font-size: 14px; }
h6 { font-size: 12px; }

p {
  margin-bottom: var(--space-12);
  line-height: var(--line-height-relaxed);
}

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

a:hover,
a:focus {
  color: var(--color-primary-dark);
  outline: none;
}

a:active {
  opacity: 0.7;
}

/* ============================================
   IMAGE DEFAULTS
   ============================================ */

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

/* Lazy loading placeholder */
img[loading="lazy"] {
  background-color: #F0F0F0;
}

/* ============================================
   LIST DEFAULTS
   ============================================ */

ul, ol {
  list-style: none;
}

/* ============================================
   FORM ELEMENT DEFAULTS
   ============================================ */

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

input,
textarea,
select {
  width: 100%;
  padding: var(--space-12) var(--space-16);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-input);
  background-color: var(--color-card-background);
  font-size: var(--font-size-body);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
  outline: none;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 184, 148, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

input:disabled,
textarea:disabled,
select:disabled {
  background-color: #F5F5F5;
  color: var(--color-text-muted);
  cursor: not-allowed;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23777777' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

/* ============================================
   BUTTON DEFAULTS
   ============================================ */

button {
  cursor: pointer;
  border: none;
  background: none;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

button:active {
  transform: scale(0.97);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ============================================
   BUTTON VARIANTS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-12) var(--space-24);
  border-radius: var(--radius-button);
  font-size: var(--font-size-button);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  white-space: nowrap;
  user-select: none;
  min-height: 44px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-white);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-primary-dark);
}

.btn-primary:active {
  background-color: #008E6F;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: rgba(0, 184, 148, 0.05);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--color-text-white);
}

.btn-danger:hover,
.btn-danger:focus {
  background-color: #C0392B;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-outline:hover,
.btn-outline:focus {
  border-color: var(--color-text-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover,
.btn-ghost:focus {
  background-color: #F5F5F5;
  color: var(--color-text-primary);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-lg {
  padding: var(--space-16) var(--space-32);
  font-size: 16px;
  min-height: 52px;
}

.btn-sm {
  padding: var(--space-8) var(--space-16);
  font-size: var(--font-size-small);
  min-height: 36px;
}

/* ============================================
   LINK STYLE RESET
   ============================================ */

a.btn {
  color: inherit;
}

a.btn-primary {
  color: var(--color-text-white);
}

a.btn-secondary {
  color: var(--color-primary);
}

/* ============================================
   HR / DIVIDER
   ============================================ */

hr {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin: var(--space-16) 0;
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

main {
  min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height));
  padding-bottom: var(--space-24);
}

/* Adjust for pages without bottom nav */
body.no-bottom-nav main {
  min-height: calc(100vh - var(--header-height));
}

/* Adjust for dashboard pages */
body.dashboard main {
  padding-top: var(--header-height);
}

/* ============================================
   SECTION DEFAULTS
   ============================================ */

.section {
  padding: var(--section-padding-y) var(--space-16);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-16);
}

.section-title {
  font-size: var(--font-size-section-title);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.section-link {
  font-size: var(--font-size-description);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   SKELETON LOADING
   ============================================ */

.skeleton {
  background: linear-gradient(90deg, #F0F0F0 25%, #E8E8E8 50%, #F0F0F0 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-card);
}

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

.skeleton-text {
  height: 14px;
  margin-bottom: var(--space-8);
  border-radius: var(--radius-small);
}

.skeleton-title {
  height: 18px;
  width: 70%;
  margin-bottom: var(--space-8);
}

.skeleton-image {
  width: 100%;
  aspect-ratio: 1 / 1;
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

/* ============================================
   TOAST / NOTIFICATION BUBBLE
   ============================================ */

.toast-container {
  position: fixed;
  top: calc(var(--header-height) + var(--space-16));
  right: var(--space-16);
  left: var(--space-16);
  z-index: var(--z-index-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  pointer-events: none;
}

.toast {
  padding: var(--space-12) var(--space-16);
  border-radius: var(--radius-button);
  font-size: var(--font-size-description);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-white);
  box-shadow: var(--shadow-elevated);
  animation: toast-in 0.3s ease;
  pointer-events: auto;
}

.toast-success { background-color: var(--color-success); }
.toast-error { background-color: var(--color-danger); }
.toast-warning { background-color: var(--color-warning); }
.toast-info { background-color: var(--color-info); }

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   MODAL BASE
   ============================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--color-overlay);
  z-index: var(--z-index-overlay);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fade-in 0.2s ease;
}

.modal {
  background-color: var(--color-card-background);
  border-radius: var(--radius-modal) var(--radius-modal) 0 0;
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--space-24);
  animation: slide-up 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-20);
}

.modal-title {
  font-size: var(--font-size-heading-3);
  font-weight: var(--font-weight-bold);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-text-secondary);
}

.modal-close:hover {
  background-color: #F5F5F5;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

/* Desktop Modal */
@media (min-width: 769px) {
  .modal-overlay {
    align-items: center;
  }

  .modal {
    border-radius: var(--radius-modal);
    max-height: 80vh;
  }
}

/* ============================================
   BADGE BASE
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-badge);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
}

.badge-primary {
  background-color: rgba(0, 184, 148, 0.1);
  color: var(--color-primary);
}

.badge-success {
  background-color: rgba(46, 204, 113, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(243, 156, 18, 0.1);
  color: var(--color-warning);
}

.badge-danger {
  background-color: rgba(231, 76, 60, 0.1);
  color: var(--color-danger);
}

.badge-flash {
  background-color: var(--color-badge-flash);
  color: var(--color-text-white);
}

/* ============================================
   EMPTY STATE BASE
   ============================================ */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-48) var(--space-24);
  text-align: center;
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--space-16);
  opacity: 0.3;
}

.empty-state-title {
  font-size: var(--font-size-heading-3);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-8);
  color: var(--color-text-primary);
}

.empty-state-description {
  font-size: var(--font-size-description);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-20);
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

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

::-webkit-scrollbar-thumb {
  background-color: #CCC;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: #AAA;
}

/* ============================================
   SELECTION
   ============================================ */

::selection {
  background-color: rgba(0, 184, 148, 0.2);
  color: var(--color-text-primary);
}

/* ============================================
   FOCUS VISIBLE (ACCESSIBILITY)
   ============================================ */

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

/* Remove focus visible for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-24);
    padding-right: var(--space-24);
  }

  .section {
    padding-left: var(--space-24);
    padding-right: var(--space-24);
  }

  .toast-container {
    left: auto;
    right: var(--space-24);
    width: 380px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-32);
    padding-right: var(--space-32);
  }

  .section {
    padding-left: 0;
    padding-right: 0;
    max-width: var(--content-max-width);
    margin-left: auto;
    margin-right: auto;
  }
}