/* ============================================================
   LngGo GAME ENGINE — CSS المشترك لمحترف الحساب ومحترف الكيمياء
   الهويّة الداكنة (MathMaster-Design-Specs-v4.md) والشاشات كلّها:
   الافتتاح، والقائمة، والإعدادات، والمسرح، والسبّورة، والنتائج.
   كلّ لعبة تضيف بعده في <style> قواعدها وحدها. يحمّله القالب بـ?ver=filemtime
   (ls_app_engine_assets في inc/ls-apps.php).
   ============================================================ */

/* ── §38 Master Variables ─────────────────────────────────── */
:root {
  --primary:        #4a148c;
  --primary-light:  #7c43bd;
  --primary-glow:   rgba(74, 20, 140, 0.35);
  --secondary:      #5a9e5e;
  --secondary-light:#81c784;
  --secondary-dark: #388e3c;

  --success:        #388e3c;
  --success-light:  rgba(56, 142, 60, 0.20);
  --success-glow:   rgba(56, 142, 60, 0.35);
  --danger:         #c62828;
  --danger-light:   rgba(198, 40, 40, 0.20);
  --danger-glow:    rgba(198, 40, 40, 0.35);
  --warning:        #e65100;
  --warning-light:  rgba(230, 81, 0, 0.20);
  --warning-glow:   rgba(230, 81, 0, 0.35);
  --info:           #0277bd;
  --info-light:     rgba(2, 119, 189, 0.20);

  --gold:           #ffd700;
  --gold-dark:      #ffb700;

  --bg-dark:        #0f0f1a;
  --text-primary:   #f0f0ff;
  --text-secondary: #b0bec5;
  --text-muted:     #7986cb;

  --glass:          rgba(255, 255, 255, 0.06);
  --glass-hover:    rgba(255, 255, 255, 0.11);
  --glass-border:   rgba(255, 255, 255, 0.09);
  --glass-strong:   rgba(255, 255, 255, 0.13);

  --shadow-soft:    0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-medium:  0 12px 40px rgba(74, 20, 140, 0.25);
  --shadow-strong:  0 20px 50px rgba(0, 0, 0, 0.55);

  --radius-sm:   12px;
  --radius-md:   16px;
  --radius-lg:   24px;
  --radius-xl:   32px;
  --radius-full: 9999px;

  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 15px;
  --text-md:   16px;
  --text-lg:   18px;
  --text-xl:   22px;
  --text-2xl:  26px;
  --text-3xl:  32px;
  --weight-light:   300;
  --weight-regular: 400;
  --weight-bold:    700;
  --weight-black:   800;

  --transition:    0.25s ease;
  --ease-bounce:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-slide:    cubic-bezier(0.86, 0, 0.07, 1);

  --z-base:     1;
  --z-raised:   10;
  --z-backdrop: 1100;
  --z-modal:    1200;
  --z-overlay:  1300;
  --z-flash:    1400;
  --z-intro:    1500;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Almarai", "Cairo", sans-serif;
}

/* ── Body ─────────────────────────────────────────────────── */
body {
  min-height: 100vh;
  background: var(--bg-dark);
  color: var(--text-primary);
  overflow-x: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

/* ── Decorative Background ────────────────────────────────── */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 25% 8%,  rgba(74, 20, 140, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse at 82% 92%, rgba(90, 158, 94, 0.20) 0%, transparent 50%),
    #0f0f1a;
}
.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 20, 140, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 20, 140, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
}
.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 18s ease-in-out infinite;
}
.shape-1 {
  width: 520px; height: 520px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  top: -180px; right: -100px;
  opacity: 0.18;
}
.shape-2 {
  width: 380px; height: 380px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  bottom: -100px; left: -80px;
  opacity: 0.13;
  animation-delay: -7s;
}
.shape-3 {
  width: 240px; height: 240px;
  background: linear-gradient(135deg, #ff6b6b, #e65100);
  top: 55%; left: 65%;
  opacity: 0.08;
  animation-delay: -12s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(18px, -25px) scale(1.04); }
  66%       { transform: translate(-12px, 12px) scale(0.97); }
}
/* اللمس: الأشكال (blur 80px) تتحرّك بلا توقّف تحت بطاقات backdrop-filter، فيعيد الجهاز التمويهين في كلّ إطار
   ويتأخّر رسم استجابة النقر. على الجوّال تثبت، وحركتها بطيئة لا تكاد تُرى (18 ثانية، ~25px). */
@media (hover: none), (pointer: coarse) {
  .shape { animation: none; }
}

/* ── Keyframes ────────────────────────────────────────────── */
@keyframes panelIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes introPop {
  0%   { transform: scale(0.65) translateY(20px); opacity: 0; filter: blur(10px); }
  65%  { transform: scale(1.04); opacity: 1; filter: blur(0); }
  100% { transform: scale(1); }
}
@keyframes menuPop {
  0%   { transform: scale(0.85); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes resultsSlideUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes flashPulse {
  0%, 100% { transform: scale(1); opacity: 0; }
  50%       { transform: scale(1.1); opacity: 1; }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   MAIN WRAPPER
   ============================================================ */
.math-quiz-app {
  position: relative;
  z-index: var(--z-base);
  width: 100%;
  max-width: 960px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 40px); /* داخل حشوة body (20px من كلّ جهة)؛ 100vh كانت تزيد الصفحة 40px فيظهر شريط تمرير لا يحرّك شيئًا */
  isolation: isolate;
}

/* WordPress admin bar offsets */
.math-quiz-app .menu-screen,
.math-quiz-app .results-screen,
.math-quiz-app .intro-overlay,
.math-quiz-app .flash-question,
.math-quiz-app .settings-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
}
body.admin-bar .math-quiz-app .intro-overlay,
body.admin-bar .math-quiz-app .menu-screen,
body.admin-bar .math-quiz-app .results-screen,
body.admin-bar .math-quiz-app .settings-screen,
body.admin-bar .math-quiz-app .flash-question {
  top: 32px;
  height: calc(100vh - 32px);
}
@media screen and (max-width: 782px) {
  body.admin-bar .math-quiz-app .intro-overlay,
  body.admin-bar .math-quiz-app .menu-screen,
  body.admin-bar .math-quiz-app .results-screen,
  body.admin-bar .math-quiz-app .settings-screen,
  body.admin-bar .math-quiz-app .flash-question {
    top: 46px;
    height: calc(100vh - 46px);
  }
}

/* ============================================================
   SCREEN 1 — INTRO OVERLAY
   ============================================================ */
.intro-overlay {
  background: #070712;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-intro);
}
.intro-wrap {
  text-align: center;
  padding: 44px 56px;
  border: 2px solid rgba(124, 67, 189, 0.35);
  border-radius: var(--radius-xl);
  background: rgba(74, 20, 140, 0.10);
  backdrop-filter: blur(24px);
  box-shadow: 0 0 90px rgba(74, 20, 140, 0.28);
  animation: introPop 0.9s var(--ease-bounce) both;
}
.intro-emojis {
  font-size: 32px;
  letter-spacing: 10px;
  margin-bottom: 14px;
}
.intro-title {
  font-size: clamp(26px, 6vw, 52px);
  font-weight: var(--weight-black);
  color: var(--gold);
  line-height: 1.15;
}
.intro-sub {
  margin-top: 10px;
  color: var(--text-secondary);
  font-weight: var(--weight-bold);
  font-size: clamp(14px, 2.6vw, 20px);
}

/* ============================================================
   SCREEN 2 — MENU SCREEN
   ============================================================ */
.menu-screen {
  background: rgba(7, 7, 18, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  /* شاشة قصيرة: البطاقة أطول من النافذة، فتُمرَّر الشاشة نفسها (هي ثابتة، فتمرير الصفحة لا يحرّكها).
     safe: لا يُقصّ أعلاها بالتوسيط؛ والمتصفّح الذي لا يعرفها يبقى على center. */
  overflow-y: auto;
  align-items: safe center;
  justify-content: safe center;
  padding: 20px 0;
}
.menu-screen.show {
  opacity: 1;
  pointer-events: auto;
}
.menu-container {
  text-align: center;
  padding: 40px 32px;
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-strong);
  max-width: 420px;
  width: 90%;
  animation: menuPop 0.6s var(--ease-bounce);
  position: relative;
  overflow: hidden;
  flex-shrink: 0; /* في عمود الشاشة (مع أيقونة التطبيق) كان ينكمش فيقصّ overflow أزرارَه */
}
.menu-container::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.menu-title {
  font-size: 34px;
  font-weight: var(--weight-black);
  color: var(--gold);
  margin-bottom: 8px;
  text-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
}
.menu-subtitle {
  font-size: var(--text-md);
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.menu-btn {
  padding: 14px 28px;
  font-size: var(--text-lg);
  font-weight: var(--weight-black);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-soft);
  font-family: "Almarai", sans-serif;
}
.menu-btn.primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #111;
}
.menu-btn.secondary {
  background: linear-gradient(135deg, #7c43bd, var(--primary));
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
}
@media (hover: hover) { .menu-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.45);
} }


/* ============================================================
   SCREEN 3 — SETTINGS SCREEN (MODAL)
   ============================================================ */
.settings-screen {
  background: rgba(5, 5, 16, 0.80);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
  padding: 20px;
}
.settings-screen.show {
  opacity: 1;
  pointer-events: auto;
}
.settings-container {
  position: relative;
  background: rgba(20, 10, 40, 0.92);
  border: 1px solid rgba(124, 67, 189, 0.35);
  border-radius: var(--radius-xl);
  padding: 28px 32px;
  max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  width: 100%;
  box-shadow: var(--shadow-strong);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.settings-container::-webkit-scrollbar { display: none; }
.settings-container::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

/* ✕ Close Button */
.settings-close-btn {
  position: absolute;
  top: 14px;
  left: 16px;
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition);
  font-family: "Almarai", sans-serif;
}
@media (hover: hover) { .settings-close-btn:hover {
  background: rgba(198, 40, 40, 0.30);
  color: #fff;
} }

.settings-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-black);
  color: var(--gold);
  margin-bottom: 22px;
  text-align: center;
}
.setting-item { margin-bottom: 16px; }
.setting-label {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  margin-bottom: 6px;
  display: block;
}
.setting-input {
  width: 100%;
  padding: 10px 14px;
  font-size: var(--text-sm);
  border: 1px solid rgba(124, 67, 189, 0.40);
  border-radius: var(--radius-sm);
  background: rgba(74, 20, 140, 0.15);
  color: var(--text-primary);
  font-family: "Almarai", sans-serif;
  font-weight: var(--weight-bold);
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}
.setting-input:focus {
  border-color: var(--primary-light);
  background: rgba(74, 20, 140, 0.28);
}
.setting-input option {
  background: #1a0a2e;
  color: var(--text-primary);
}
.settings-actions {
  display: flex;
  gap: 10px;
  margin-top: 22px;
}
.settings-btn {
  flex: 1;
  padding: 13px;
  font-size: var(--text-md);
  font-weight: var(--weight-black);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  font-family: "Almarai", sans-serif;
}
.settings-btn.start {
  background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
  color: #fff;
}
.settings-btn.back {
  background: rgba(255,255,255,0.10);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.15);
}
@media (hover: hover) { .settings-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
} }


/* ============================================================
   SCREEN 4 — RESULTS SCREEN
   ============================================================ */
.results-screen {
  background: rgba(7, 7, 18, 0.88);
  /* بلا backdrop-filter: كان يجعل الشاشة حاويةً لشريط الأزرار الثابت فيتحرّك مع التمرير */
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  padding: 40px 20px 110px; /* مساحة لشريط الأزرار الثابت */
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.results-screen.show {
  opacity: 1;
  pointer-events: auto;
}
.results-container {
  max-width: 900px;
  width: 100%;
  animation: resultsSlideUp 0.6s ease;
}
.results-header {
  text-align: center;
  margin-bottom: 24px;
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  padding: 24px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-strong);
  position: relative;
  overflow: hidden;
}
.results-header::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
}
.results-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-black);
  color: var(--gold);
  margin-bottom: 10px;
}
.results-score {
  font-size: var(--text-xl);
  font-weight: var(--weight-black);
  color: var(--text-primary);
  margin-bottom: 6px;
}
.results-percentage {
  font-size: var(--text-2xl);
  font-weight: var(--weight-black);
  color: var(--gold);
}
.results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}
.result-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: transform 0.2s ease;
  backdrop-filter: blur(12px);
}
@media (hover: hover) { .result-item:hover { transform: translateX(-4px); } }
.result-item.correct {
  border-color: rgba(56, 142, 60, 0.60);
  background: var(--success-light);
}
.result-item.wrong {
  border-color: rgba(198, 40, 40, 0.50);
  background: var(--danger-light);
}
.result-item.timeout {
  border-color: rgba(230, 81, 0, 0.60);
  background: var(--warning-light);
}
.result-question {
  direction: ltr;
  unicode-bidi: isolate;
  text-align: right;
  font-size: var(--text-xl);
  font-weight: var(--weight-black);
  color: var(--text-primary);
  margin-bottom: 10px;
}
.result-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: var(--text-sm);
}
.result-detail-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.result-label {
  font-weight: var(--weight-bold);
  color: var(--text-muted);
  min-width: 120px;
}
.result-value { color: var(--text-primary); font-weight: var(--weight-bold); }
.result-value.correct-answer { color: var(--secondary-light); }
.result-value.wrong-answer   { color: #ef9a9a; }
.result-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-weight: var(--weight-black);
  font-size: var(--text-xs);
}
.result-status.correct  { background: var(--secondary); color: #fff; }
.result-status.wrong    { background: var(--danger); color: #fff; }
.result-status.timeout  { background: var(--warning); color: #fff; }
/* شريط أزرار النتائج — مطابق لمحترف اللغة (2026-10-13) */
.results-actions {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 16px 20px;
  background: rgba(15, 15, 26, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--glass-border);
  z-index: 1001;
}
.results-btn {
  padding: 16px 32px;
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  font-family: "Almarai", sans-serif;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
@media (hover: hover) { .results-btn:hover  { transform: translateY(-3px); } }
.results-btn:active { transform: scale(0.98); }

.results-btn.home {
  background: var(--glass-strong);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}
.results-btn.replay {
  background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  box-shadow: 0 8px 24px var(--primary-glow);
}
@media (hover: hover) { .results-btn.replay:hover { box-shadow: 0 14px 32px var(--primary-glow); } }

/* ============================================================
   FLASH QUESTION
   ============================================================ */
.flash-question {
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: var(--z-flash);
}
.flash-question.show {
  opacity: 1;
  pointer-events: auto;
}
.flash-content { text-align: center; animation: flashPulse 2s ease-in-out; }
.flash-text {
  font-size: 80px;
  font-weight: var(--weight-black);
  color: var(--gold);
  text-shadow: 0 0 40px rgba(255, 215, 0, 0.8);
  letter-spacing: 0;
}

/* ============================================================
   GAME STAGE
   ============================================================ */
.stage {
  width: 760px;
  max-width: 95vw;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  padding: 22px;
  box-shadow: var(--shadow-strong);
  position: relative;
  overflow: hidden;
  animation: panelIn 0.5s var(--ease-bounce) both;
}
.stage::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* ── Header ───────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
  margin-bottom: 10px;
}
.left-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.round-counter {
  width: 58px; height: 58px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--primary-light), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--weight-black);
  font-size: 18px;
  color: #fff;
  box-shadow: 0 6px 20px var(--primary-glow);
  flex-shrink: 0;
}
.title-box { display: flex; flex-direction: column; }
.title-main {
  font-size: var(--text-lg);
  font-weight: var(--weight-black);
  color: var(--text-primary);
  letter-spacing: 0;
}
.level-badge {
  margin-top: 5px;
  display: inline-block;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-weight: var(--weight-bold);
  background: rgba(255, 215, 0, 0.12);
  border: 1px solid rgba(255, 215, 0, 0.30);
  color: var(--gold);
  font-size: var(--text-xs);
}

/* ── Canvas (Question + Timer Layout) ────────────────────── */
.canvas {
  display: flex;
  gap: 32px;
  align-items: center;
  justify-content: center;
  padding: 10px 0 8px;
}
.question-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.question-text {
  font-size: 56px;
  font-weight: 600;
  color: var(--text-primary);
  text-shadow: 0 6px 30px rgba(0, 0, 0, 0.6);
}
.rq {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 900;
  unicode-bidi: isolate;
}
.qbox {
  display: inline-block;
  width: 1.15em; height: 1.15em;
  line-height: 1.15em;
  border: 2px solid currentColor;
  border-radius: 8px;
  font-size: 0.9em;
  text-align: center;
  font-weight: 900;
}

/* ── Side Panel (Timer) ───────────────────────────────────── */
.side-panel {
  width: 130px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.timer-circle {
  width: 100px;
  height: 100px;
  position: relative;
}
.timer-circle svg {
  display: block;
  width: 100%;
  height: 100%;
}
.timer-number {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: var(--weight-black);
  color: var(--text-primary);
}
.side-panel > div[style] {
  font-weight: var(--weight-bold);
  font-size: var(--text-md);
  color: var(--text-secondary);
}

/* ── Options ──────────────────────────────────────────────── */
.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
  width: 100%;
}
.opt {
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 22px;
  font-weight: var(--weight-bold);
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
  user-select: none;
}
/* للفأرة وحدها: على اللمس يعلق :hover بعد النقر فيتحرّك الظلّ والرفع مع لون الإجابة في الإطار نفسه */
@media (hover: hover) {
  .opt:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.4);
    background: var(--glass-hover);
    border-color: rgba(255, 255, 255, 0.20);
  }
}
.opt .letter {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: var(--weight-black);
  font-size: 18px;
  flex: 0 0 38px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.opt .text { flex: 1; text-align: center; }
.letter.A { background: linear-gradient(135deg, var(--primary-light), var(--primary)); }
.letter.B { background: linear-gradient(135deg, #1976d2, #0d47a1); }
.letter.C { background: linear-gradient(135deg, var(--warning), #bf360c); }
.letter.D { background: linear-gradient(135deg, var(--secondary), var(--secondary-dark)); }
.opt.correct {
  background: linear-gradient(135deg, rgba(56,142,60,0.35), rgba(56,142,60,0.20));
  border-color: rgba(56,142,60,0.70);
  color: #a5d6a7;
}
.opt.wrong {
  background: linear-gradient(135deg, rgba(198,40,40,0.30), rgba(198,40,40,0.15));
  border-color: rgba(198,40,40,0.60);
  color: #ef9a9a;
}

/* ── Progress Bar ─────────────────────────────────────────── */
.progress-wrap { margin-top: 16px; width: 100%; }
.progress-bg {
  background: rgba(255,255,255,0.08);
  height: 16px;
  border-radius: var(--radius-full);
  overflow: hidden;
}

/* ── Answer Reveal ────────────────────────────────────────── */
.answer-reveal {
  margin-top: 10px;
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(255,215,0,0.20), rgba(255,183,0,0.10));
  border: 1px solid rgba(255, 215, 0, 0.40);
  color: var(--gold);
  font-size: 24px;
  font-weight: var(--weight-black);
  text-align: center;
  box-shadow: 0 8px 24px rgba(255, 215, 0, 0.15);
  opacity: 0;
  transform: translateY(-8px);
  transition: all 0.4s ease;
  pointer-events: none;
}
.answer-reveal.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ── زرّ «التالي» بعد الخطأ (nextOnWrong) ─────────────────── */
.next-btn {
  display: block;
  margin: 14px auto 0;
  min-width: 180px;
  padding: 12px 34px;
  border: none;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #111;
  font-family: "Almarai", sans-serif;
  font-size: 18px;
  font-weight: var(--weight-black);
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35);
  animation: nextIn .3s ease backwards;
}
.next-btn[hidden] { display: none; }
.next-btn:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
@media (hover: hover) { .next-btn:hover { transform: translateY(-2px); } }
@keyframes nextIn { from { transform: translateY(6px); } to { transform: none; } }

/* ── Timer Status (Whiteboard open) ──────────────────────── */
.timer-status {
  text-align: center;
  color: var(--gold);
  font-weight: var(--weight-bold);
  font-size: var(--text-md);
  margin: 10px 0;
  padding: 8px 16px;
  background: rgba(255, 215, 0, 0.10);
  border: 1px solid rgba(255, 215, 0, 0.25);
  border-radius: var(--radius-sm);
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  flex-wrap: wrap;
}
.footer button {
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: var(--weight-bold);
  cursor: pointer;
  font-family: "Almarai", sans-serif;
  font-size: var(--text-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
@media (hover: hover) { .footer button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.35);
} }

/* ── Whiteboard Container ─────────────────────────────────── */
.whiteboard-container {
  display: none;
  margin: 18px 0;
  padding: 18px;
  background: #fff;
  border: 2px solid rgba(124, 67, 189, 0.50);
  border-radius: var(--radius-md);
  animation: slideDown 0.3s ease;
}
.whiteboard-container.active { display: block; }
.whiteboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e0e0e0;
}
.whiteboard-title {
  font-size: 18px;
  font-weight: var(--weight-black);
  color: #333;
}
.whiteboard-close {
  background: #e74c3c;
  color: #fff;
  border: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: var(--weight-bold);
  font-family: "Almarai", sans-serif;
  font-size: 13px;
  transition: background var(--transition);
}
@media (hover: hover) { .whiteboard-close:hover { background: #c0392b; } }
.whiteboard-tools {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 10px;
}
.tool-btn {
  padding: 7px 14px;
  border: 2px solid #ddd;
  background: white;
  border-radius: 8px;
  cursor: pointer;
  font-family: "Almarai", sans-serif;
  font-weight: 600;
  font-size: 13px;
  transition: all 0.2s ease;
  color: #333;
}
@media (hover: hover) { .tool-btn:hover { background: #f0f0f0; } }
.tool-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}
.tool-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.brush-control { display: flex; align-items: center; gap: 8px; }
.brush-slider { width: 90px; }
.color-picker { display: flex; gap: 8px; align-items: center; }
.color-btn {
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 2px solid #ddd;
  cursor: pointer;
  transition: transform 0.2s ease;
}
@media (hover: hover) { .color-btn:hover { transform: scale(1.15); } }
.color-btn.active { border: 3px solid #333; box-shadow: 0 0 0 2px white; }
.canvas-wrapper {
  border: 2px solid #ddd;
  border-radius: 8px;
  background: #f5f5f5;
  position: relative;
}
#whiteboard-canvas {
  background: white;
  cursor: crosshair;
  touch-action: none;
  display: block;
  width: 100%;
  border-radius: 6px;
}

/* ── Sticky Notes ─────────────────────────────────────────── */
.sticky-notes-container {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none; z-index: 10;
}
.sticky-note {
  position: absolute;
  width: 250px;
  min-height: 140px;
  padding: 12px;
  background: #ffd966;
  border-radius: 4px;
  box-shadow: 3px 3px 8px rgba(0,0,0,0.2);
  cursor: move;
  font-family: "Almarai", sans-serif;
  font-size: 13px;
  color: #333;
  z-index: 1;
  pointer-events: auto;
}
@media (hover: hover) { .sticky-note:hover { box-shadow: 5px 5px 15px rgba(0,0,0,0.3); z-index: 2; } }
.sticky-note.dragging { opacity: 0.8; z-index: 10; }
.sticky-note-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px; padding-bottom: 6px;
  border-bottom: 1px solid rgba(0,0,0,0.1);
}
.sticky-note-drag-handle { cursor: move; font-size: 16px; user-select: none; }
.sticky-note-delete {
  background: #e74c3c; color: white; border: none;
  border-radius: 50%; width: 22px; height: 22px;
  font-size: 14px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.sticky-note-content {
  width: 100%; min-height: 80px;
  background: transparent; border: none; outline: none;
  font-family: "Almarai", sans-serif; font-size: 13px; color: #333;
  resize: vertical; line-height: 1.4;
}
.sticky-note-footer {
  display: flex; gap: 5px; margin-top: 8px; padding-top: 8px;
  border-top: 1px solid rgba(0,0,0,0.1);
}
.note-color-btn {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.2); cursor: pointer;
}
.sticky-note-resize {
  position: absolute; bottom: 2px; left: 2px;
  width: 20px; height: 20px; cursor: nwse-resize;
  font-size: 16px; color: rgba(0,0,0,0.3); user-select: none;
  display: flex; align-items: center; justify-content: center;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .canvas {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }
  .side-panel {
    order: -1;
    width: 100%;
    flex-direction: row;
    justify-content: center;
    gap: 16px;
  }
  .question-area { width: 100%; align-items: center; }
  .question-text { font-size: 42px; text-wrap: nowrap; }
  .options { width: 100%; max-width: 480px; margin: 0 auto; }
  .progress-wrap { width: 100%; max-width: 480px; margin: 0 auto; }
  .timer-circle { width: 80px; height: 80px; }
  .timer-number { font-size: 24px; }
  .stage { padding: 14px; }
}
@media (max-width: 480px) {
  .results-btn { padding: 14px 20px; font-size: var(--text-base); }
}

/* ── §22 Accessibility ────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--primary-light);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@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;
  }
}