/* ==========================================================================
   Pixel Academy V2 — Visual Foundation
   Design tokens + shared primitives (buttons, forms, cards, chips, modals,
   alerts, tables, navigation). Arabic-first, RTL, mobile-first.
   Loaded AFTER modified_style.css so it safely overrides the legacy theme.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand — Pixel purple */
  --pa-primary: #6c3bf4;
  --pa-primary-600: #5a2ae0;
  --pa-primary-700: #4a20bd;
  --pa-primary-100: #ebe4ff;
  --pa-primary-050: #f4f0ff;

  /* Learning environment — deep indigo */
  --pa-indigo-900: #0d0a24;
  --pa-indigo-800: #141032;
  --pa-indigo-700: #1d1745;
  --pa-indigo-600: #2a2160;

  /* Accent — controlled cyan */
  --pa-accent: #22d3ee;
  --pa-accent-600: #0da5c0;
  --pa-accent-050: #e6fbff;

  /* Surfaces */
  --pa-bg: #f6f6fb;
  --pa-surface: #ffffff;
  --pa-surface-2: #fbfaff;
  --pa-surface-3: #f1f0f8;

  /* Text */
  --pa-text: #16132e;
  --pa-text-2: #43406a;
  --pa-text-muted: #6d6a89;
  --pa-text-invert: #ffffff;
  --pa-text-invert-muted: rgba(255, 255, 255, 0.72);

  /* Lines */
  --pa-border: #e7e5f2;
  --pa-border-strong: #d5d2e6;
  --pa-border-invert: rgba(255, 255, 255, 0.14);

  /* Status */
  --pa-success: #16a34a;
  --pa-success-bg: #e9f8ef;
  --pa-danger: #e11d48;
  --pa-danger-bg: #fdecf1;
  --pa-warning: #d97706;
  --pa-warning-bg: #fdf3e4;
  --pa-info: #0e7490;
  --pa-info-bg: #e6f7fb;

  /* Radii */
  --pa-radius-sm: 10px;
  --pa-radius: 14px;
  --pa-radius-lg: 18px;
  --pa-radius-xl: 20px;
  --pa-radius-pill: 999px;

  /* Shadows — restrained */
  --pa-shadow-xs: 0 1px 2px rgba(20, 16, 50, 0.06);
  --pa-shadow-sm: 0 2px 8px rgba(20, 16, 50, 0.06);
  --pa-shadow: 0 6px 20px rgba(20, 16, 50, 0.08);
  --pa-shadow-lg: 0 16px 40px rgba(20, 16, 50, 0.14);

  /* Spacing scale */
  --pa-space-1: 4px;
  --pa-space-2: 8px;
  --pa-space-3: 12px;
  --pa-space-4: 16px;
  --pa-space-5: 20px;
  --pa-space-6: 24px;
  --pa-space-8: 32px;
  --pa-space-10: 40px;

  /* Typography */
  --pa-font: "Cairo", "Baloo 2", "Segoe UI", system-ui, -apple-system, sans-serif;
  --pa-fs-xs: 0.75rem;   /* 12 */
  --pa-fs-sm: 0.8125rem; /* 13 */
  --pa-fs-md: 0.9375rem; /* 15 */
  --pa-fs-lg: 1.0625rem; /* 17 */
  --pa-fs-xl: 1.25rem;   /* 20 */
  --pa-fs-2xl: 1.5rem;   /* 24 */
  --pa-lh-tight: 1.3;
  --pa-lh: 1.7;

  /* Motion */
  --pa-t-fast: 150ms;
  --pa-t: 180ms;
  --pa-t-slow: 250ms;
  --pa-ease: cubic-bezier(0.2, 0, 0.2, 1);

  /* Controls */
  --pa-touch: 44px;
  --pa-focus: 0 0 0 3px rgba(108, 59, 244, 0.35);
}

/* --------------------------------------------------------------------------
   2. Base
   -------------------------------------------------------------------------- */
body.pixel-v2 {
  font-family: var(--pa-font);
  font-size: var(--pa-fs-md);
  line-height: var(--pa-lh);
  color: var(--pa-text);
  background-color: var(--pa-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body.pixel-v2 h1,
body.pixel-v2 h2,
body.pixel-v2 h3,
body.pixel-v2 h4,
body.pixel-v2 h5,
body.pixel-v2 h6 {
  font-family: var(--pa-font);
  font-weight: 700;
  line-height: var(--pa-lh-tight);
  color: var(--pa-text);
  margin: 0 0 var(--pa-space-3);
}

body.pixel-v2 p {
  margin: 0 0 var(--pa-space-3);
  color: var(--pa-text-2);
}

body.pixel-v2 a {
  color: var(--pa-primary);
  text-decoration: none;
  transition: color var(--pa-t) var(--pa-ease);
}

body.pixel-v2 a:hover {
  color: var(--pa-primary-600);
}

body.pixel-v2 img {
  max-width: 100%;
  height: auto;
}

body.pixel-v2 ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Visible, consistent focus for keyboard users */
body.pixel-v2 :focus-visible {
  outline: none;
  box-shadow: var(--pa-focus);
  border-radius: var(--pa-radius-sm);
}

.pa-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   3. Buttons
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-btn,
body.pixel-v2 .th-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--pa-space-2);
  min-height: var(--pa-touch);
  padding: 10px var(--pa-space-5);
  font-family: var(--pa-font);
  font-size: var(--pa-fs-md);
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  color: var(--pa-text-invert);
  background: var(--pa-primary);
  background-image: none;
  border: 1px solid transparent;
  border-radius: var(--pa-radius);
  box-shadow: var(--pa-shadow-xs);
  cursor: pointer;
  transition: background-color var(--pa-t) var(--pa-ease),
    transform var(--pa-t) var(--pa-ease), box-shadow var(--pa-t) var(--pa-ease),
    border-color var(--pa-t) var(--pa-ease), color var(--pa-t) var(--pa-ease);
}

body.pixel-v2 .pa-btn::before,
body.pixel-v2 .pa-btn::after,
body.pixel-v2 .th-btn::before,
body.pixel-v2 .th-btn::after {
  content: none;
}

body.pixel-v2 .pa-btn:hover,
body.pixel-v2 .th-btn:hover {
  color: var(--pa-text-invert);
  background: var(--pa-primary-600);
  box-shadow: var(--pa-shadow-sm);
}

body.pixel-v2 .pa-btn:active,
body.pixel-v2 .th-btn:active {
  transform: translateY(1px);
  box-shadow: none;
}

body.pixel-v2 .pa-btn:disabled,
body.pixel-v2 .pa-btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* Secondary / outline */
body.pixel-v2 .pa-btn--secondary {
  color: var(--pa-primary);
  background: var(--pa-primary-050);
  border-color: var(--pa-primary-100);
}

body.pixel-v2 .pa-btn--secondary:hover {
  color: var(--pa-primary-700);
  background: var(--pa-primary-100);
}

body.pixel-v2 .pa-btn--ghost {
  color: var(--pa-text-2);
  background: transparent;
  border-color: var(--pa-border);
  box-shadow: none;
}

body.pixel-v2 .pa-btn--ghost:hover {
  color: var(--pa-primary);
  background: var(--pa-surface-3);
  border-color: var(--pa-border-strong);
}

body.pixel-v2 .pa-btn--accent {
  color: var(--pa-indigo-900);
  background: var(--pa-accent);
}

body.pixel-v2 .pa-btn--accent:hover {
  color: var(--pa-indigo-900);
  background: var(--pa-accent-600);
}

body.pixel-v2 .pa-btn--block {
  display: flex;
  width: 100%;
}

body.pixel-v2 .pa-btn--sm {
  min-height: 38px;
  padding: 8px var(--pa-space-4);
  font-size: var(--pa-fs-sm);
  border-radius: var(--pa-radius-sm);
}

/* Icon-only control */
body.pixel-v2 .pa-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--pa-touch);
  height: var(--pa-touch);
  padding: 0;
  color: var(--pa-text-2);
  background: transparent;
  border: 1px solid var(--pa-border);
  border-radius: var(--pa-radius-sm);
  cursor: pointer;
  transition: background-color var(--pa-t) var(--pa-ease),
    color var(--pa-t) var(--pa-ease), border-color var(--pa-t) var(--pa-ease);
}

body.pixel-v2 .pa-icon-btn:hover {
  color: var(--pa-primary);
  background: var(--pa-surface-3);
  border-color: var(--pa-border-strong);
}

/* --------------------------------------------------------------------------
   4. Cards & surfaces
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-card {
  background: var(--pa-surface);
  border: 1px solid var(--pa-border);
  border-radius: var(--pa-radius-lg);
  box-shadow: var(--pa-shadow-sm);
}

body.pixel-v2 .pa-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--pa-space-3);
  padding: var(--pa-space-4) var(--pa-space-5);
  border-bottom: 1px solid var(--pa-border);
}

body.pixel-v2 .pa-card__title {
  margin: 0;
  font-size: var(--pa-fs-lg);
  font-weight: 700;
}

body.pixel-v2 .pa-card__body {
  padding: var(--pa-space-5);
}

/* --------------------------------------------------------------------------
   5. Chips / badges
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--pa-space-2);
  max-width: 100%;
  padding: 6px var(--pa-space-3);
  font-size: var(--pa-fs-sm);
  font-weight: 600;
  color: var(--pa-text-2);
  background: var(--pa-surface-3);
  border: 1px solid var(--pa-border);
  border-radius: var(--pa-radius-pill);
  white-space: nowrap;
}

body.pixel-v2 .pa-chip i {
  color: var(--pa-primary);
  font-size: var(--pa-fs-sm);
}

body.pixel-v2 .pa-chip--accent {
  color: var(--pa-info);
  background: var(--pa-accent-050);
  border-color: rgba(34, 211, 238, 0.3);
}

body.pixel-v2 .pa-chip--accent i {
  color: var(--pa-accent-600);
}

body.pixel-v2 .pa-chip strong {
  color: var(--pa-text);
  font-weight: 800;
}

/* --------------------------------------------------------------------------
   6. Forms
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-field {
  margin-bottom: var(--pa-space-4);
}

body.pixel-v2 .pa-label {
  display: block;
  margin-bottom: var(--pa-space-2);
  font-size: var(--pa-fs-sm);
  font-weight: 700;
  color: var(--pa-text-2);
}

body.pixel-v2 .pa-input,
body.pixel-v2 .pa-select,
body.pixel-v2 .pa-textarea {
  display: block;
  width: 100%;
  min-height: var(--pa-touch);
  padding: 10px var(--pa-space-4);
  font-family: var(--pa-font);
  font-size: var(--pa-fs-md);
  color: var(--pa-text);
  background: var(--pa-surface);
  border: 1px solid var(--pa-border-strong);
  border-radius: var(--pa-radius);
  transition: border-color var(--pa-t) var(--pa-ease),
    box-shadow var(--pa-t) var(--pa-ease);
}

body.pixel-v2 .pa-input::placeholder,
body.pixel-v2 .pa-textarea::placeholder {
  color: var(--pa-text-muted);
}

body.pixel-v2 .pa-input:focus,
body.pixel-v2 .pa-select:focus,
body.pixel-v2 .pa-textarea:focus {
  outline: none;
  border-color: var(--pa-primary);
  box-shadow: var(--pa-focus);
}

body.pixel-v2 .pa-textarea {
  min-height: 120px;
  line-height: var(--pa-lh);
  resize: vertical;
}

body.pixel-v2 .pa-help {
  margin: var(--pa-space-2) 0 0;
  font-size: var(--pa-fs-sm);
  color: var(--pa-text-muted);
}

/* --------------------------------------------------------------------------
   7. Alerts / messages
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--pa-space-3);
  padding: var(--pa-space-4);
  font-size: var(--pa-fs-md);
  border: 1px solid transparent;
  border-radius: var(--pa-radius);
}

body.pixel-v2 .pa-alert--info {
  color: var(--pa-info);
  background: var(--pa-info-bg);
  border-color: rgba(14, 116, 144, 0.18);
}

body.pixel-v2 .pa-alert--success {
  color: var(--pa-success);
  background: var(--pa-success-bg);
  border-color: rgba(22, 163, 74, 0.18);
}

body.pixel-v2 .pa-alert--warning {
  color: var(--pa-warning);
  background: var(--pa-warning-bg);
  border-color: rgba(217, 119, 6, 0.18);
}

body.pixel-v2 .pa-alert--danger {
  color: var(--pa-danger);
  background: var(--pa-danger-bg);
  border-color: rgba(225, 29, 72, 0.18);
}

/* Presentation-only request states: idle / loading / empty / error.
   These never carry backend content — only static labels and real API
   messages passed in by the page script. */
body.pixel-v2 .pa-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--pa-space-3);
  padding: var(--pa-space-8) var(--pa-space-4);
  text-align: center;
  color: var(--pa-text-muted);
  background: var(--pa-surface-2);
  border: 1px dashed var(--pa-border-strong);
  border-radius: var(--pa-radius);
}

body.pixel-v2 .pa-state > i {
  font-size: 1.75rem;
  color: var(--pa-border-strong);
}

body.pixel-v2 .pa-state p {
  margin: 0;
  max-width: 42ch;
  font-size: var(--pa-fs-md);
  color: var(--pa-text-muted);
}

body.pixel-v2 .pa-state--error {
  color: var(--pa-danger);
  background: var(--pa-danger-bg);
  border-style: solid;
  border-color: rgba(225, 29, 72, 0.22);
}

body.pixel-v2 .pa-state--error > i,
body.pixel-v2 .pa-state--error p {
  color: var(--pa-danger);
}

body.pixel-v2 .pa-state--loading {
  border-style: solid;
  border-color: var(--pa-border);
}

/* Round status badge used inside message modals */
body.pixel-v2 .pa-state__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto var(--pa-space-3);
  font-size: 1.5rem;
  color: var(--pa-primary);
  background: var(--pa-primary-050);
  border-radius: var(--pa-radius-pill);
}

body.pixel-v2 .pa-state__badge--danger {
  color: var(--pa-danger);
  background: var(--pa-danger-bg);
}

/* Spinner */
body.pixel-v2 .pa-spinner {
  display: inline-block;
  width: 26px;
  height: 26px;
  border: 3px solid var(--pa-border);
  border-top-color: var(--pa-primary);
  border-radius: var(--pa-radius-pill);
  animation: pa-spin 700ms linear infinite;
}

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

/* Skeleton placeholder — shape only, never fake content */
body.pixel-v2 .pa-skeleton {
  color: transparent !important;
  background: linear-gradient(
      90deg,
      var(--pa-surface-3) 25%,
      var(--pa-border) 37%,
      var(--pa-surface-3) 63%
    )
    var(--pa-surface-3);
  background-size: 400% 100%;
  border-color: transparent !important;
  border-radius: var(--pa-radius-sm);
  animation: pa-shimmer 1.4s ease infinite;
  user-select: none;
}

body.pixel-v2 .pa-skeleton * {
  visibility: hidden;
}

@keyframes pa-shimmer {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

/* Button loading indicator */
body.pixel-v2 .th-btn.is-loading,
body.pixel-v2 .pa-btn.is-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

body.pixel-v2 .th-btn.is-loading > *,
body.pixel-v2 .pa-btn.is-loading > * {
  visibility: hidden;
}

body.pixel-v2 .th-btn.is-loading::after,
body.pixel-v2 .pa-btn.is-loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #fff;
  border-radius: var(--pa-radius-pill);
  animation: pa-spin 700ms linear infinite;
}

body.pixel-v2 .th-btn:disabled,
body.pixel-v2 .pa-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

body.pixel-v2 .th-btn.is-loading:disabled,
body.pixel-v2 .pa-btn.is-loading:disabled {
  opacity: 0.9;
}

/* --------------------------------------------------------------------------
   8. Tables
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-table-wrap {
  width: 100%;
  overflow-x: auto;
  background: var(--pa-surface);
  border: 1px solid var(--pa-border);
  border-radius: var(--pa-radius-lg);
  -webkit-overflow-scrolling: touch;
}

body.pixel-v2 .pa-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: var(--pa-fs-md);
}

body.pixel-v2 .pa-table th,
body.pixel-v2 .pa-table td {
  padding: var(--pa-space-3) var(--pa-space-4);
  text-align: right;
  border-bottom: 1px solid var(--pa-border);
}

body.pixel-v2 .pa-table th {
  font-weight: 700;
  color: var(--pa-text-2);
  background: var(--pa-surface-3);
  white-space: nowrap;
}

body.pixel-v2 .pa-table tbody tr:last-child td {
  border-bottom: 0;
}

body.pixel-v2 .pa-table tbody tr:hover td {
  background: var(--pa-surface-2);
}

/* --------------------------------------------------------------------------
   9. Modals — centered on desktop, bottom sheet on mobile
   -------------------------------------------------------------------------- */
body.pixel-v2 .modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1200;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(13, 10, 36, 0.62);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

body.pixel-v2 .modal.is-open {
  display: block;
  animation: pa-fade var(--pa-t) var(--pa-ease);
}

@keyframes pa-fade {
  from {
    opacity: 0;
  }
}

/* Background must not scroll while a dialog is open */
body.pixel-v2.pa-modal-open {
  overflow: hidden;
}

body.pixel-v2 .modal .modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(500px, calc(100% - 32px));
  max-width: none;
  padding: var(--pa-space-6);
  color: var(--pa-text);
  background: var(--pa-surface);
  border: 1px solid var(--pa-border);
  border-radius: var(--pa-radius-xl);
  box-shadow: var(--pa-shadow-lg);
}

body.pixel-v2 .modal .modal-content--center {
  text-align: center;
}

body.pixel-v2 .modal .modal-content h2 {
  margin: 0 0 var(--pa-space-3);
  font-size: var(--pa-fs-xl);
}

body.pixel-v2 .modal .modal-content p {
  margin: 0 0 var(--pa-space-3);
  color: var(--pa-text-2);
}

body.pixel-v2 .modal .modal-close {
  position: absolute;
  top: 10px;
  left: 12px;
  right: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1;
  color: var(--pa-text-muted);
  background: var(--pa-surface-3);
  border: 0;
  border-radius: var(--pa-radius-pill);
  cursor: pointer;
  transition: color var(--pa-t) var(--pa-ease),
    background-color var(--pa-t) var(--pa-ease);
}

body.pixel-v2 .modal .modal-close:hover,
body.pixel-v2 .modal .modal-close:focus {
  color: var(--pa-text);
  background: var(--pa-border);
}

@media (max-width: 575.98px) {
  body.pixel-v2 .modal .modal-content {
    top: auto;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--pa-space-6) var(--pa-space-5) calc(var(--pa-space-6) + env(safe-area-inset-bottom, 0px));
    transform: none;
    border-width: 1px 0 0;
    border-radius: var(--pa-radius-xl) var(--pa-radius-xl) 0 0;
  }

  body.pixel-v2 .modal .modal-content::before {
    content: "";
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 44px;
    height: 4px;
    background: var(--pa-border-strong);
    border-radius: var(--pa-radius-pill);
  }
}

/* --------------------------------------------------------------------------
   10. Navigation / mobile menu (legacy theme drawer, restyled)
   -------------------------------------------------------------------------- */
body.pixel-v2 .th-menu-wrapper .th-menu-area {
  background: var(--pa-surface);
  border-inline-start: 1px solid var(--pa-border);
}

body.pixel-v2 .th-menu-wrapper .th-mobile-menu ul li a {
  display: flex;
  align-items: center;
  min-height: var(--pa-touch);
  padding: var(--pa-space-2) var(--pa-space-3);
  font-family: var(--pa-font);
  font-size: var(--pa-fs-md);
  font-weight: 600;
  color: var(--pa-text);
  border-radius: var(--pa-radius-sm);
  transition: background-color var(--pa-t) var(--pa-ease),
    color var(--pa-t) var(--pa-ease);
}

body.pixel-v2 .th-menu-wrapper .th-mobile-menu ul li a:hover {
  color: var(--pa-primary);
  background: var(--pa-primary-050);
}

body.pixel-v2 .th-menu-wrapper .th-menu-toggle {
  min-width: var(--pa-touch);
  min-height: var(--pa-touch);
  color: var(--pa-text-invert);
  background: var(--pa-primary);
  border: 0;
  border-radius: var(--pa-radius-pill);
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   11. Brand lock — official Pixel Academy logo primitives
   -------------------------------------------------------------------------- */
body.pixel-v2 .pa-brand-link {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  max-width: 100%;
  line-height: 0;
}

body.pixel-v2 .pa-brand-logo {
  display: block;
  width: auto;
  height: 28px;
  max-width: 180px;
  object-fit: contain;
  background: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

body.pixel-v2 .pa-brand-logo--drawer {
  height: 44px;
  max-width: 220px;
  margin-inline: auto;
}

@media (min-width: 768px) {
  body.pixel-v2 .pa-brand-logo {
    height: 34px;
    max-width: 220px;
  }

  body.pixel-v2 .pa-brand-logo--drawer {
    height: 44px;
    max-width: 220px;
  }
}

/* --------------------------------------------------------------------------
   12. Motion preferences
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  body.pixel-v2 *,
  body.pixel-v2 *::before,
  body.pixel-v2 *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}