/* ==========================================================================
   Stylish English — Curriculum Map & Lesson Cards (css/curriculum.css)
   Replaces the 191 curriculum selectors that were removed from app.min.css
   (5 overlapping generations of rules, 100+ !important). Reads the shared
   --vf-* tokens from css/tokens.css. The only !important in this file is the
   prefers-reduced-motion override at the very end.

   State hooks (set by app.js — unchanged):
     .rm-zone.zone-open / .zone-active   month opened / focused
     body.month-view                     single-month screen
     body.quiz-mode                      boss-gate screen
     .lesson-card.rm-open                lesson expanded
     .lesson-card.lesson-done            lesson completed
     .lesson-card.is-current-lesson      "you are here"
     .rm-gate-content.rm-gate-open       boss gate shown

   Performance decisions (why this is lighter than before)
   - Open/close does NOT animate height. The old max-height:80000px /
     12000px / 50000px transitions re-ran layout on every frame across huge
     lesson bodies. Now a body switches display once (one layout), then its
     content fades/slides in with transform/opacity only.
   - Closed lesson bodies are display:none, so the browser no longer lays out
     36 hidden lessons full of tables and quizzes on every page reflow.
   - No backdrop-filter on cards (it was on every card: expensive GPU work on
     each scroll frame, especially on phones). Solid dark gradients instead.
   - No translateZ(0)/will-change on every card (it forced dozens of GPU
     layers to stay in memory permanently).
   - Hover effects apply only on devices that can hover, so taps on phones
     never leave a card stuck "lifted".
   ========================================================================== */

/* 1. MONTHS GRID (home) ---------------------------------------------------- */
.rm-months-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}
@media (min-width: 1024px) {
  .rm-months-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
  .rm-zone.zone-open { grid-column: 1 / -1; }
}

/* 2. MONTH (ZONE) ---------------------------------------------------------- */
.rm-zone {
  contain: layout style;
  font-family: var(--vf-font-ar);
  line-height: var(--vf-lh);
}
.rm-zone-header {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 10px;
  padding: 22px 24px;
  border-radius: var(--vf-radius-lg);
  background: linear-gradient(135deg, #1d1433 0%, var(--vf-surface) 100%);
  border: 1px solid var(--vf-border-strong);
  color: var(--vf-text);
  font-family: var(--vf-font-head);
  font-size: 18px;
  font-weight: 800;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--vf-fast) var(--vf-ease), border-color var(--vf-med) var(--vf-ease);
}
.rm-zone-header small {
  flex-basis: 100%;
  color: var(--vf-text-2);
  font-family: var(--vf-font-ar);
  font-size: 13px;
  font-weight: 500;
}
.rm-zone-icon { font-size: 22px; color: var(--vf-accent-2); }
.rm-zone-chevron {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 11px;
  transition: transform var(--vf-med) var(--vf-ease), background-color var(--vf-med) var(--vf-ease);
}
.rm-zone.zone-open .rm-zone-chevron { transform: rotate(90deg); background: rgba(167, 139, 250, 0.2); }
.rm-zone-progress-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid var(--vf-border-strong);
  color: #e9e3ff;
  font-size: 12px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.rm-zone.zone-open .rm-zone-header { border-radius: var(--vf-radius-lg) var(--vf-radius-lg) 0 0; }
@media (hover: hover) {
  .rm-zone-header:hover { transform: translateY(-2px); border-color: var(--vf-accent-2); }
}
.rm-zone-header:active { transform: scale(0.99); }
@media (min-width: 1024px) {
  .rm-zone-header { flex-direction: column; min-height: 100%; }
}
@media (max-height: 500px) and (orientation: landscape) {
  .rm-zone-header { padding: 14px 20px; }
}

/* Zone body: shown/hidden in one step, content fades in (no height animation) */
.rm-zone-body { display: none; }
.rm-zone.zone-open .rm-zone-body {
  display: block;
  padding: 16px 8px 12px;
  border: 1px solid var(--vf-border);
  border-top: 0;
  border-radius: 0 0 var(--vf-radius-lg) var(--vf-radius-lg);
  background: rgba(255, 255, 255, 0.015);
}

/* 3. MONTH VIEW (single month screen) --------------------------------------- */
body.month-view .rm-zone:not(.zone-active) { display: none; }
body.month-view .rm-zone.zone-active .rm-zone-header { display: none; }
body.month-view .rm-zone.zone-active .rm-zone-body {
  display: block;
  padding: 0;
  border: 0;
  background: none;
}
.month-view-title {
  display: none;
  padding: 12px 20px 20px;
  color: var(--vf-text);
  font-family: var(--vf-font-head);
  font-size: clamp(20px, 5vw, 26px);
  font-weight: 800;
  text-align: center;
  direction: rtl;
}
body.month-view .month-view-title { display: block; animation: cur-fade-up var(--vf-med) var(--vf-ease) backwards; }
.month-view-title .mvt-sub {
  display: block;
  margin-top: 4px;
  color: var(--vf-text-2);
  font-family: var(--vf-font-ar);
  font-size: 13px;
  font-weight: 400;
}

/* 4. LESSON GRID ------------------------------------------------------------- */
.rm-path {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 640px) { .rm-path { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; } }

/* 5. LESSON CARD — closed (tile) ------------------------------------------ */
.lesson-card {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--vf-surface-2) 0%, var(--vf-surface) 100%);
  border: 1px solid var(--vf-border);
  color: var(--vf-text);
  font-family: var(--vf-font-ar);
  line-height: var(--vf-lh);
  transition: transform var(--vf-fast) var(--vf-ease), border-color var(--vf-med) var(--vf-ease);
}
.rm-path .lesson-card { cursor: pointer; }
/* Staggered entrance when a month opens. fill-mode "backwards" (not "both"),
   so once finished the animation releases transform and hover still works. */
.rm-zone.zone-open .lesson-card,
body.month-view .zone-active .lesson-card {
  animation: cur-fade-up 360ms var(--vf-ease) backwards;
  animation-delay: calc(var(--cur-i, 0) * 28ms);
}
.rm-path .lesson-card:nth-child(2)  { --cur-i: 1; }
.rm-path .lesson-card:nth-child(3)  { --cur-i: 2; }
.rm-path .lesson-card:nth-child(4)  { --cur-i: 3; }
.rm-path .lesson-card:nth-child(5)  { --cur-i: 4; }
.rm-path .lesson-card:nth-child(6)  { --cur-i: 5; }
.rm-path .lesson-card:nth-child(7)  { --cur-i: 6; }
.rm-path .lesson-card:nth-child(8)  { --cur-i: 7; }
.rm-path .lesson-card:nth-child(9)  { --cur-i: 8; }
.rm-path .lesson-card:nth-child(10) { --cur-i: 9; }
.rm-path .lesson-card:nth-child(11) { --cur-i: 10; }
.rm-path .lesson-card:nth-child(n+12) { --cur-i: 11; }

@media (hover: hover) {
  .rm-path .lesson-card:not(.rm-open):hover { transform: translateY(-3px); border-color: var(--vf-accent-2); }
  .rm-path .lesson-card:not(.rm-open):hover .lesson-number-badge { border-color: var(--vf-listen); color: #cffafe; }
}
.rm-path .lesson-card:not(.rm-open):active { transform: scale(0.98); }

.lesson-header {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 12px 16px;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.lesson-header:focus-visible {
  outline: 2px solid var(--vf-listen);
  outline-offset: -2px;
  border-radius: 18px;
}
.lesson-number-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  height: 32px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid var(--vf-border-strong);
  color: #e9e3ff;
  font-family: var(--vf-font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transition: border-color var(--vf-med) var(--vf-ease), color var(--vf-med) var(--vf-ease);
}
.lesson-level-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--vf-font-en);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.lesson-level-badge.lesson-level-a1 { background: rgba(52, 211, 153, 0.12); border-color: rgba(52, 211, 153, 0.4); color: #6ee7b7; }
.lesson-level-badge.lesson-level-a2 { background: rgba(167, 139, 250, 0.14); border-color: rgba(167, 139, 250, 0.45); color: #c4b5fd; }
.lesson-title-ar {
  color: var(--vf-text);
  font-family: var(--vf-font-head);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.5;
}
.lesson-title-en {
  display: none;
  color: var(--vf-text-3);
  font-family: var(--vf-font-en);
  font-size: 12px;
  font-weight: 500;
  direction: ltr;
}
.lesson-goal { display: none; }
.rm-toggle { display: none; } /* chevron injected by app.js, shown when open */

/* 6. LESSON CARD — open ------------------------------------------------------ */
.rm-path .lesson-card.rm-open {
  grid-column: 1 / -1;
  cursor: default;
  border-color: var(--vf-border-strong);
  text-align: right;
}
.lesson-card.rm-open .lesson-header {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 20px 24px;
  text-align: right;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.12) 0%, transparent 100%);
  border-bottom: 1px solid var(--vf-border);
}
.lesson-card.rm-open .lesson-title-ar { font-size: 19px; }
.lesson-card.rm-open .lesson-title-en { display: block; flex-basis: 100%; text-align: right; }
.lesson-card.rm-open .lesson-goal {
  display: flex;
  gap: 8px;
  flex-basis: 100%;
  margin: 0;
  color: var(--vf-text-2);
  font-size: 14px;
  line-height: 1.7;
}
.lesson-goal::before { content: "🎯"; flex-shrink: 0; }
.lesson-card.rm-open .rm-toggle {
  position: absolute;
  top: 18px;
  inset-inline-end: 18px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: rgba(139, 92, 246, 0.14);
  color: var(--vf-accent-2);
  font-size: 12px;
  transform: rotate(90deg);
  cursor: pointer;
}

/* Lesson body: one display switch, then content fades in */
.lesson-body { display: none; }
.lesson-card.rm-open .lesson-body {
  display: block;
  padding: 22px 24px 26px;
  animation: cur-fade-up var(--vf-med) var(--vf-ease) backwards;
}
/* Standalone lesson cards outside the map (none today) stay readable */
.lesson-card:not(.rm-path .lesson-card) { margin-bottom: 20px; }
.lesson-card:not(.rm-path .lesson-card) .lesson-body { display: block; padding: 22px 24px; }

/* 7. COMPLETED / CURRENT ------------------------------------------------------ */
.lesson-card.lesson-done { border-color: rgba(52, 211, 153, 0.45); }
.lesson-card.lesson-done .lesson-number-badge {
  background: linear-gradient(135deg, #059669, #34d399);
  border-color: transparent;
  color: #fff;
}
.lesson-card.lesson-done::after {
  content: "✓";
  position: absolute;
  top: 10px;
  inset-inline-end: 10px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--vf-success);
  color: #06281c;
  font-size: 11px;
  font-weight: 900;
  z-index: 1;
  pointer-events: none;
  animation: cur-pop var(--vf-med) var(--vf-ease) backwards;
}
.lesson-card.rm-open.lesson-done::after { top: 22px; inset-inline-end: 60px; }

.lesson-card.is-current-lesson {
  overflow: visible;
  border-color: rgba(251, 191, 36, 0.7);
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.25), 0 12px 32px -14px rgba(251, 191, 36, 0.5);
}
.lesson-card.is-current-lesson::before {
  content: "أنت هنا";
  position: absolute;
  top: -10px;
  inset-inline-start: 16px;
  z-index: 2;
  padding: 1px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, #fbbf24, #d97706);
  color: #1c1402;
  font-family: var(--vf-font-ar);
  font-size: 11px;
  font-weight: 800;
  pointer-events: none;
}

/* 8. BOSS GATE ------------------------------------------------------------------ */
.rm-boss-gate {
  grid-column: 1 / -1;
  margin: 14px 0 6px;
  text-align: center;
}
.rm-zone.zone-open .rm-boss-gate,
body.month-view .zone-active .rm-boss-gate {
  animation: cur-fade-up 420ms var(--vf-ease) 320ms backwards;
}
.rm-gate-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: var(--vf-radius);
  background: linear-gradient(135deg, #2a1d05 0%, #1a1224 100%);
  border: 1px solid rgba(251, 191, 36, 0.5);
  color: #fde68a;
  font-family: var(--vf-font-head);
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--vf-fast) var(--vf-ease), border-color var(--vf-med) var(--vf-ease);
}
.rm-gate-icon { font-size: 18px; color: var(--vf-meaning); }
@media (hover: hover) { .rm-gate-btn:hover { transform: translateY(-2px); border-color: var(--vf-meaning); } }
.rm-gate-btn:active { transform: scale(0.97); }
.rm-gate-btn:focus-visible { outline: 2px solid var(--vf-listen); outline-offset: 3px; }

.rm-gate-content { display: none; }
.rm-gate-content.rm-gate-open {
  display: block;
  margin-top: 20px;
  animation: cur-fade-up var(--vf-med) var(--vf-ease) backwards;
}

/* 9. QUIZ MODE (boss gate screen) ---------------------------------------------- */
body.quiz-mode .rm-zone:not(.zone-open) { display: none; }
body.quiz-mode .rm-zone.zone-open .rm-zone-header,
body.quiz-mode .rm-zone.zone-open .rm-path,
body.quiz-mode .rm-zone.zone-open .rm-boss-gate { display: none; }
body.quiz-mode .rm-gate-content.rm-gate-open { display: block; }

/* 10. SMALL SCREENS ------------------------------------------------------------ */
@media (max-width: 640px) {
  .rm-zone-header { padding: 18px 16px; font-size: 16px; }
  .lesson-header { padding: 16px 8px 12px; }
  .lesson-title-ar { font-size: 13px; }
  .lesson-number-badge { min-width: 76px; height: 28px; font-size: 10px; }
  .lesson-card.rm-open .lesson-header { padding: 16px 16px; }
  .lesson-card.rm-open .lesson-title-ar { font-size: 17px; }
  .lesson-card.rm-open .lesson-body { padding: 16px 12px 20px; }
  .lesson-card.rm-open .rm-toggle { top: 14px; inset-inline-end: 12px; }
  .lesson-card.rm-open.lesson-done::after { top: 18px; inset-inline-end: 52px; }
}

/* 11. PRINT --------------------------------------------------------------------- */
@media print {
  .lesson-card { break-inside: avoid; box-shadow: none; border: 1px solid #ccc; transform: none; animation: none; }
  .lesson-body { display: block; }
}

/* KEYFRAMES / MOTION ------------------------------------------------------------- */
@keyframes cur-fade-up { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes cur-pop { from { opacity: 0; transform: scale(0.4); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .rm-months-grid *,
  .rm-months-grid *::before,
  .rm-months-grid *::after,
  .month-view-title {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
}