/**
 * Item Exchange Platform - Dark Theme
 * WCAG 2.1 AA compliant dark color scheme
 */

/* ============================================
   Dark Theme Color Palette
   ============================================ */
:root {
  /* Background Colors */
  --color-bg-primary: #1a1a1a;
  --color-bg-secondary: #2a2a2a;
  --color-bg-tertiary: #333333;

  /* Text Colors - Meeting WCAG AA Contrast Requirements */
  --color-text-primary: #ffffff;       /* Contrast ratio: 18.7:1 on #1a1a1a */
  --color-text-secondary: #e0e0e0;     /* Contrast ratio: 13.9:1 on #1a1a1a */
  --color-text-tertiary: #b0b0b0;      /* Contrast ratio: 8.3:1 on #1a1a1a */
  --color-text-muted: #808080;         /* Contrast ratio: 4.6:1 on #1a1a1a */

  /* Primary Colors - Purple accent like arcforge.org */
  --color-primary: #8b5cf6;            /* Purple - arcforge.org accent color */
  --color-primary-hover: #7c3aed;
  --color-primary-light: #a78bfa;
  --color-primary-dark: #6d28d9;
  --color-primary-alpha: rgba(139, 92, 246, 0.2);
  --color-primary-text: #ffffff;

  /* Status Badge Colors - High Contrast */
  --color-looking-for: #FF9800;        /* Orange - Contrast ratio: 5.1:1 on #1a1a1a */
  --color-looking-for-bg: rgba(255, 152, 0, 0.15);
  --color-looking-for-border: rgba(255, 152, 0, 0.3);
  --color-looking-for-text: #FFB74D;

  --color-have-extra: #4CAF50;         /* Green - Contrast ratio: 4.8:1 on #1a1a1a */
  --color-have-extra-bg: rgba(76, 175, 80, 0.15);
  --color-have-extra-border: rgba(76, 175, 80, 0.3);
  --color-have-extra-text: #81C784;

  /* Semantic Colors */
  --color-success: #4CAF50;
  --color-success-bg: rgba(76, 175, 80, 0.1);
  --color-success-border: rgba(76, 175, 80, 0.3);

  --color-warning: #FF9800;
  --color-warning-bg: rgba(255, 152, 0, 0.1);
  --color-warning-border: rgba(255, 152, 0, 0.3);

  --color-error: #F44336;
  --color-error-bg: rgba(244, 67, 54, 0.1);
  --color-error-border: rgba(244, 67, 54, 0.3);

  --color-info: #2196F3;
  --color-info-bg: rgba(33, 150, 243, 0.1);
  --color-info-border: rgba(33, 150, 243, 0.3);

  /* Border and Divider Colors */
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-light: rgba(255, 255, 255, 0.06);
  --color-border-strong: rgba(255, 255, 255, 0.2);

  /* Link Colors */
  --color-link: #2196F3;
  --color-link-hover: #64B5F6;
  --color-link-visited: #9C27B0;

  /* Shadow Colors */
  --shadow-color: rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 2px 4px var(--shadow-color);
  --shadow-md: 0 4px 8px var(--shadow-color);
  --shadow-lg: 0 8px 16px var(--shadow-color);
  --shadow-xl: 0 12px 24px var(--shadow-color);

  /* Overlay Colors */
  --overlay-light: rgba(0, 0, 0, 0.4);
  --overlay-medium: rgba(0, 0, 0, 0.6);
  --overlay-heavy: rgba(0, 0, 0, 0.8);
}

/* ============================================
   High Contrast Mode Support
   ============================================ */
@media (prefers-contrast: high) {
  :root {
    --color-bg-primary: #000000;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #2a2a2a;

    --color-text-primary: #ffffff;
    --color-text-secondary: #ffffff;
    --color-text-tertiary: #e0e0e0;

    --color-border: rgba(255, 255, 255, 0.3);
    --color-border-strong: rgba(255, 255, 255, 0.5);

    /* Stronger status colors for high contrast */
    --color-looking-for: #FFB74D;
    --color-have-extra: #81C784;
    --color-primary: #64B5F6;
  }
}

/* ============================================
   Base Theme Styles
   ============================================ */
body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-family-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Item Card Dark Theme
   ============================================ */
.exchange-item-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
}

.exchange-item-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-xl);
}

.exchange-item-card:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha), var(--shadow-lg);
}

/* Card Title */
.exchange-item-title {
  color: var(--color-text-primary);
}

.exchange-item-title a {
  color: var(--color-text-primary);
}

.exchange-item-title a:hover {
  color: var(--color-primary-light);
}

/* Card Metadata */
.exchange-item-meta {
  color: var(--color-text-secondary);
}

.exchange-item-meta-label {
  color: var(--color-text-tertiary);
}

/* Author Section */
.exchange-item-author {
  border-top-color: var(--color-border);
}

.exchange-item-author-name {
  color: var(--color-text-secondary);
}

/* ============================================
   Status Badges
   ============================================ */
.exchange-status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  line-height: 1.4;
  border: 1px solid transparent;
}

/* Looking For Status */
.exchange-status-badge.looking-for {
  background-color: var(--color-looking-for-bg);
  color: var(--color-looking-for-text);
  border-color: var(--color-looking-for-border);
}

.exchange-status-badge.looking-for::before {
  content: '\1F50D';
  font-size: var(--font-size-base);
}

/* Have Extra Status */
.exchange-status-badge.have-extra {
  background-color: var(--color-have-extra-bg);
  color: var(--color-have-extra-text);
  border-color: var(--color-have-extra-border);
}

.exchange-status-badge.have-extra::before {
  content: '\2713';
  font-size: var(--font-size-base);
}

/* ============================================
   Filter Controls Dark Theme
   ============================================ */
.exchange-filters {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.exchange-filters-title {
  color: var(--color-text-primary);
}

.exchange-filter-label {
  color: var(--color-text-secondary);
}

/* ============================================
   Form Elements Dark Theme
   ============================================ */
.exchange-input,
.exchange-select,
.exchange-textarea {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.exchange-input:hover,
.exchange-select:hover,
.exchange-textarea:hover {
  border-color: var(--color-border-strong);
}

.exchange-input:focus,
.exchange-select:focus,
.exchange-textarea:focus {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-alpha);
}

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

/* Select dropdown arrow for dark theme */
.exchange-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='%23e0e0e0' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* File Upload */
.exchange-file-upload-label {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.exchange-file-upload-label:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-primary);
}

/* ============================================
   Links
   ============================================ */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

a:visited {
  color: var(--color-link-visited);
}

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

/* ============================================
   Buttons Dark Theme
   ============================================ */
.exchange-button-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
  border: none;
}

.exchange-button-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.exchange-button-primary:active:not(:disabled) {
  background-color: var(--color-primary-dark);
}

.exchange-button-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.exchange-button-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-border-strong);
}

.exchange-button-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.exchange-button-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
}

/* ============================================
   Loading States Dark Theme
   ============================================ */
.exchange-spinner {
  border-color: var(--color-border);
  border-top-color: var(--color-primary);
}

.exchange-loading-text {
  color: var(--color-text-secondary);
}

.exchange-skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-tertiary) 0%,
    var(--color-bg-secondary) 50%,
    var(--color-bg-tertiary) 100%
  );
}

/* ============================================
   Empty State Dark Theme
   ============================================ */
.exchange-empty-state {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
}

.exchange-empty-state-title {
  color: var(--color-text-primary);
}

.exchange-empty-state-message {
  color: var(--color-text-secondary);
}

/* ============================================
   Pagination Dark Theme
   ============================================ */
.exchange-pagination-button {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.exchange-pagination-button:hover:not(:disabled):not(.active) {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-primary);
}

.exchange-pagination-button.active {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
  border-color: var(--color-primary);
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-tertiary);
  border-radius: 6px;
  border: 2px solid var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-strong);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-bg-tertiary) var(--color-bg-secondary);
}

/* ============================================
   Selection Styling
   ============================================ */
::selection {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
}

::-moz-selection {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
}

/* ============================================
   Focus Indicators (Accessibility)
   ============================================ */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ============================================
   Notification/Toast Messages
   ============================================ */
.exchange-notification {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.exchange-notification-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-text-primary);
}

.exchange-notification-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-text-primary);
}

.exchange-notification-error {
  background-color: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-text-primary);
}

.exchange-notification-info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-text-primary);
}

/* ============================================
   Modal/Dialog Dark Theme
   ============================================ */
.exchange-modal-overlay {
  background-color: var(--overlay-medium);
  backdrop-filter: blur(4px);
}

.exchange-modal {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
}

.exchange-modal-header {
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.exchange-modal-body {
  color: var(--color-text-secondary);
}

.exchange-modal-footer {
  border-top: 1px solid var(--color-border);
}

/* ============================================
   Tooltips Dark Theme
   ============================================ */
.exchange-tooltip {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

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

/* ============================================
   Dark Theme for Code Blocks
   ============================================ */
code,
pre {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

code {
  padding: 2px 6px;
  font-size: 0.9em;
}

pre {
  padding: var(--spacing-md);
  overflow-x: auto;
}

pre code {
  border: none;
  padding: 0;
  background: none;
}

/* ============================================
   Tables Dark Theme
   ============================================ */
table {
  border-collapse: collapse;
  width: 100%;
}

th,
td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
}

tr:hover {
  background-color: var(--color-bg-tertiary);
}

/* ============================================
   Horizontal Rules
   ============================================ */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

/* ============================================
   Blockquotes
   ============================================ */
blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ============================================
   Lists
   ============================================ */
ul,
ol {
  color: var(--color-text-secondary);
}

li::marker {
  color: var(--color-text-tertiary);
}

/* ============================================
   Disabled States
   ============================================ */
:disabled,
[disabled],
.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   Inline Quantity Controls (Desktop Only)
   ============================================ */
.quick-action-group {
  position: relative;
  display: inline-block;
}

.inline-quantity-controls {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(3px);
  margin-top: 6px;
  background: rgba(26, 26, 26, 0.98);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 6px;
  padding: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(139, 92, 246, 0.1);
  z-index: 100;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.inline-quantity-controls.show {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.inline-quantity-controls::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid rgba(139, 92, 246, 0.3);
}

.inline-quantity-controls::after {
  content: '';
  position: absolute;
  top: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 5px solid rgba(26, 26, 26, 0.98);
}

.inline-quantity-controls .quantity-btn {
  width: 24px;
  height: 24px;
  min-width: 24px;
  border: 1px solid rgba(139, 92, 246, 0.3);
  background: rgba(42, 42, 42, 0.8);
  color: #c4b5fd;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  padding: 0;
}

.inline-quantity-controls .quantity-btn:hover {
  background: rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.6);
  color: #fff;
  transform: scale(1.05);
}

.inline-quantity-controls .quantity-btn:active {
  transform: scale(0.95);
}

.inline-quantity-controls .quantity-input {
  width: 40px;
  height: 24px;
  border: 1px solid rgba(139, 92, 246, 0.3);
  background: rgba(42, 42, 42, 0.8);
  color: #fff;
  border-radius: 4px;
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  padding: 0 4px;
  margin: 0 2px;
}

.inline-quantity-controls .quantity-input:focus {
  outline: none;
  border-color: rgba(139, 92, 246, 0.8);
  background: rgba(42, 42, 42, 1);
  box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.1);
}

/* Hide spinner arrows in number input */
.inline-quantity-controls .quantity-input::-webkit-inner-spin-button,
.inline-quantity-controls .quantity-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.inline-quantity-controls .quantity-input[type=number] {
  -moz-appearance: textfield;
}

.inline-quantity-controls .quantity-confirm-btn {
  width: 28px;
  height: 24px;
  min-width: 28px;
  border: none;
  background: linear-gradient(135deg, #4caf50 0%, #45a049 100%);
  color: #fff;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  padding: 0;
  margin-left: 2px;
  box-shadow: 0 2px 4px rgba(76, 175, 80, 0.3);
}

.inline-quantity-controls .quantity-confirm-btn:hover {
  background: linear-gradient(135deg, #45a049 0%, #4caf50 100%);
  transform: scale(1.08);
  box-shadow: 0 3px 8px rgba(76, 175, 80, 0.4);
}

.inline-quantity-controls .quantity-confirm-btn:active {
  transform: scale(0.95);
}

/* Hide inline controls on mobile */
@media (max-width: 768px) {
  .inline-quantity-controls {
    display: none !important;
  }
}