/* =====================================================================
   studio.css — مساحة الملاحظات وقلم التابلت فوق الشرح والقوانين
   Apple Pencil & Stylus Studio with Full Lesson Overlay
   ===================================================================== */

/* ---------- 1) الحاوية الرئيسية للاستوديو ---------- */
.studio-root {
  display: flex;
  flex-direction: column;
  position: relative;
  background: #f1f5f9;
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  height: calc(100vh - 165px);
  min-height: 650px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none !important;
  overscroll-behavior: none !important;
}

[data-theme="dark"] .studio-root {
  background: #0b1120;
}

/* ---------- 2) وضع التابلت الكامل (Tablet Fullscreen Mode) ---------- */
body.tablet-studio-active {
  overflow: hidden !important;
  height: 100vh !important;
  width: 100vw !important;
  margin: 0 !important;
  padding: 0 !important;
  touch-action: none !important;
  overscroll-behavior: none !important;
}

body.tablet-studio-active .top-navbar,
body.tablet-studio-active .sidebar,
body.tablet-studio-active aside#sidebar,
body.tablet-studio-active .view-section:not(#view-canvas),
body.tablet-studio-active .selection-popup,
body.tablet-studio-active .quick-translate-bubble {
  display: none !important;
}

body.tablet-studio-active .app-layout {
  display: block !important;
  margin: 0 !important;
  padding: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100% !important;
  overflow: hidden !important;
}

body.tablet-studio-active .main-content {
  margin: 0 !important;
  padding: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100% !important;
  overflow: hidden !important;
}

body.tablet-studio-active #view-canvas {
  display: block !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: hidden !important;
}

body.tablet-studio-active .studio-root {
  height: 100vh !important;
  width: 100vw !important;
  max-width: 100vw !important;
  border-radius: 0 !important;
  border: none !important;
  box-shadow: none !important;
  overflow: hidden !important;
}

/* زر التبديل لوضع التابلت في الشريط العلوي */
.tablet-mode-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  background: linear-gradient(135deg, #4f46e5 0%, #3b82f6 100%);
  color: #ffffff;
  border: none;
  border-radius: 20px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.tablet-mode-toggle-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.5);
}

.tablet-mode-toggle-btn.is-active {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

/* ---------- 3) شريط أدوات الآيباد العلوي الاحترافي الموحد (Docked Top Bar) ---------- */
.studio-topbar-ipad {
  position: relative;
  width: 100%;
  height: 52px;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(203, 213, 225, 0.85);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  z-index: 100;
  flex-shrink: 0;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.studio-topbar-ipad::-webkit-scrollbar {
  display: none;
}

[data-theme="dark"] .studio-topbar-ipad {
  background: rgba(15, 23, 42, 0.97);
  border-bottom-color: rgba(51, 65, 85, 0.8);
}

.topbar-group-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* زر اختيار الدرس */
.studio-topic-picker-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  padding: 5px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s ease;
  max-width: 320px;
  text-align: right;
}

[data-theme="dark"] .studio-topic-picker-btn {
  background: #1e293b;
  border-color: #475569;
}

.studio-topic-picker-btn:hover {
  background: #f1f5f9;
  border-color: #2563eb;
}

.topic-picker-icon {
  font-size: 1.15rem;
}

.topic-picker-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topic-picker-title {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--text-main, #0f172a);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topic-picker-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted, #64748b);
  white-space: nowrap;
}

.topic-picker-arrow {
  font-size: 0.65rem;
  color: #64748b;
  margin-right: 2px;
}

/* شارة المزامنة السحابية */
.studio-sync-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: 16px;
  font-size: 0.74rem;
  font-weight: 700;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  cursor: pointer;
}

.studio-sync-pill.saving {
  background: #fffbeb;
  color: #92400e;
  border-color: #fde68a;
}

.studio-sync-pill.offline {
  background: #f8fafc;
  color: #64748b;
  border-color: #cbd5e1;
}

.sync-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
}

.studio-sync-pill.saving .sync-dot {
  background: #f59e0b;
  animation: pulse-sync 1s infinite alternate;
}

@keyframes pulse-sync {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

/* زر المتابعة الحية مع الكمبيوتر */
.studio-follow-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: 16px;
  font-size: 0.74rem;
  font-weight: 700;
  background: #eff6ff;
  color: #1e40af;
  border: 1px solid #bfdbfe;
  cursor: pointer;
  transition: all 0.2s ease;
}

.studio-follow-btn.active {
  background: #2563eb;
  color: #ffffff;
  border-color: #1d4ed8;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}

/* ---------- 4) مركز الأدوات (الألوان، الأقلام، والسماكات مرتبة أفقياً) ---------- */
.topbar-group-center {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tool-segmented-group {
  display: inline-flex;
  align-items: center;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  padding: 3px;
  border-radius: 10px;
  gap: 2px;
}

[data-theme="dark"] .tool-segmented-group {
  background: #1e293b;
  border-color: #334155;
}

.ipad-bar-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: #475569;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.16s ease;
}

[data-theme="dark"] .ipad-bar-tool-btn {
  color: #94a3b8;
}

.ipad-bar-tool-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  color: #0f172a;
}

[data-theme="dark"] .ipad-bar-tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.ipad-bar-tool-btn.active {
  background: #2563eb !important;
  color: #ffffff !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}

.topbar-divider {
  width: 1px;
  height: 20px;
  background: rgba(148, 163, 184, 0.4);
  margin: 0 3px;
}

/* لوحة الألوان */
.topbar-palette {
  display: flex;
  align-items: center;
  gap: 5px;
}

.topbar-color-circle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease;
  padding: 0;
  outline: none;
}

.topbar-color-circle:hover {
  transform: scale(1.18);
}

.topbar-color-circle.active {
  border-color: #ffffff;
  box-shadow: 0 0 0 2px #2563eb;
  transform: scale(1.12);
}

.topbar-custom-color {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  padding: 0;
  background: transparent;
}

/* السماكات */
.topbar-sizes {
  display: flex;
  align-items: center;
  gap: 4px;
}

.topbar-size-btn {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

[data-theme="dark"] .topbar-size-btn {
  border-color: #475569;
}

.topbar-size-btn.active {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.12);
}

.size-dot {
  border-radius: 50%;
  background: currentColor;
  color: #334155;
}

[data-theme="dark"] .size-dot {
  color: #e2e8f0;
}

/* أزرار الإجراءات السريعة (تراجع، إعادة، مسح) */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.icon-btn-compact {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

[data-theme="dark"] .icon-btn-compact {
  background: #1e293b;
  border-color: #475569;
}

.icon-btn-compact:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
}

/* ---------- 5) المجموعة اليسرى (الزووم، العرض، والملء) ---------- */
.topbar-group-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.zoom-pill-group {
  display: inline-flex;
  align-items: center;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  overflow: hidden;
}

[data-theme="dark"] .zoom-pill-group {
  background: #1e293b;
  border-color: #475569;
}

.zoom-pill-btn {
  padding: 4px 8px;
  border: none;
  background: transparent;
  color: #334155;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
}

[data-theme="dark"] .zoom-pill-btn {
  color: #e2e8f0;
}

.zoom-pill-btn:hover {
  background: rgba(0, 0, 0, 0.06);
}

.zoom-pill-btn.fit-btn {
  font-size: 0.74rem;
  font-weight: 700;
  color: #2563eb;
  border-right: 1px solid #cbd5e1;
}

.zoom-pill-label {
  padding: 4px 6px;
  font-size: 0.76rem;
  font-weight: 700;
  color: #64748b;
  border: none;
  background: transparent;
  cursor: pointer;
  min-width: 38px;
  text-align: center;
}

.sheet-mode-select {
  padding: 5px 8px;
  border-radius: 8px;
  border: 1px solid #cbd5e1;
  background: #ffffff;
  color: #334155;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

[data-theme="dark"] .sheet-mode-select {
  background: #1e293b;
  border-color: #475569;
  color: #e2e8f0;
}

.tablet-mode-badge-btn {
  padding: 5px 10px;
  border-radius: 8px;
  background: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
}

/* ---------- 6) مسرح الشيت الدراسي الكامل (The Document Canvas Stage) ---------- */
.studio-canvas-stage {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #e2e8f0;
  touch-action: none !important;
}

[data-theme="dark"] .studio-canvas-stage {
  background: #020617;
}

.canvas-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow-y: auto;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x pan-y !important;
  overscroll-behavior: none !important;
  padding: 20px 0;
}

/* شيت الدرس الدراسي مع الهوامش */
.studio-doc-sheet {
  position: relative;
  width: 1100px;
  max-width: 96%;
  min-height: 1400px;
  background: #ffffff;
  margin: 0 auto;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
  transform-origin: top center;
  transition: transform 0.12s ease-out;

  /* خطوط الهامش المائية اللطيفة على الجانبين للملاحظات */
  background-image: 
    linear-gradient(90deg, transparent 109px, rgba(239, 68, 68, 0.22) 110px, transparent 111px),
    linear-gradient(90deg, transparent calc(100% - 111px), rgba(59, 130, 246, 0.22) calc(100% - 110px), transparent calc(100% - 109px));
}

[data-theme="dark"] .studio-doc-sheet {
  background: #0f172a;
  color: #f1f5f9;
  background-image: 
    linear-gradient(90deg, transparent 109px, rgba(239, 68, 68, 0.28) 110px, transparent 111px),
    linear-gradient(90deg, transparent calc(100% - 111px), rgba(59, 130, 246, 0.28) calc(100% - 110px), transparent calc(100% - 109px));
}

/* أنماط الورق البديلة عندما يختار المستخدم ورق مسطر أو شبكي فارغ */
.studio-doc-sheet.paper-ruled {
  background-color: #ffffff;
  background-image: 
    linear-gradient(90deg, transparent 109px, rgba(239, 68, 68, 0.25) 110px, transparent 111px),
    linear-gradient(0deg, #e2e8f0 1px, transparent 1px);
  background-size: 100% 100%, 100% 32px;
}

.studio-doc-sheet.paper-grid {
  background-color: #ffffff;
  background-image: 
    linear-gradient(#e2e8f0 1px, transparent 1px),
    linear-gradient(90deg, #e2e8f0 1px, transparent 1px);
  background-size: 24px 24px;
}

/* طبقات الرسم بالقلم والتظليل */
.canvas-drawing-layer,
.canvas-highlighter-layer,
.canvas-temp-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: transparent !important;
  touch-action: none !important;
  user-select: none !important;
  -webkit-user-select: none !important;
}

.canvas-drawing-layer {
  cursor: crosshair;
  z-index: 10;
  pointer-events: auto;
}

.canvas-highlighter-layer {
  z-index: 5;
  mix-blend-mode: multiply;
  pointer-events: none;
}

.canvas-temp-layer {
  z-index: 15;
  pointer-events: none;
}

.canvas-ref-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  pointer-events: none;
  z-index: 1;
  opacity: 0.95;
}

/* ---------- 7) محتوى الدرس والشرح المطبوع تحت القلم ---------- */
.studio-doc-content {
  display: block !important;
  padding: 40px 120px 120px 120px; /* هوامش واسعة جداً على اليمين واليسار (120px) للملاحظات */
  user-select: text;
  -webkit-user-select: text;
  pointer-events: none; /* يسمح للقلم بالرسم فوق النصوص دون تحديد الحروف بالخطأ */
  line-height: 1.75;
  color: var(--text-main, #0f172a);
}

[data-theme="dark"] .studio-doc-content {
  color: #f1f5f9;
}

.studio-doc-content * {
  user-select: text;
  -webkit-user-select: text;
}

/* ---------- 8) الشريط السفلي الاحترافي للآيباد (Dock Status Bar) ---------- */
.studio-bottombar-ipad {
  width: 100%;
  height: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(203, 213, 225, 0.85);
  font-size: 0.76rem;
  color: #64748b;
  flex-shrink: 0;
  z-index: 90;
  user-select: none;
}

[data-theme="dark"] .studio-bottombar-ipad {
  background: rgba(15, 23, 42, 0.96);
  border-top-color: rgba(51, 65, 85, 0.85);
  color: #94a3b8;
}

.bottombar-group-right,
.bottombar-group-center,
.bottombar-group-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bottombar-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 12px;
  background: #f1f5f9;
  color: #334155;
  font-weight: 600;
  font-size: 0.74rem;
}

[data-theme="dark"] .bottombar-badge {
  background: #1e293b;
  color: #cbd5e1;
}

.bottombar-hint {
  font-weight: 500;
  color: #64748b;
  font-size: 0.75rem;
}

[data-theme="dark"] .bottombar-hint {
  color: #94a3b8;
}

.bottombar-sync-label {
  font-weight: 600;
  color: #059669;
  font-size: 0.74rem;
}

/* ترويسة الدرس */
.doc-lesson-hero {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 2px dashed rgba(148, 163, 184, 0.35);
}

.doc-hero-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.doc-badge-unit {
  background: #2563eb;
  color: #ffffff;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
}

.doc-badge-pages {
  background: #f1f5f9;
  color: #475569;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid #cbd5e1;
}

[data-theme="dark"] .doc-badge-pages {
  background: #1e293b;
  color: #94a3b8;
  border-color: #475569;
}

.doc-lesson-title {
  font-size: 1.7rem;
  font-weight: 900;
  color: #0f172a;
  margin: 6px 0;
  line-height: 1.35;
}

[data-theme="dark"] .doc-lesson-title {
  color: #f8fafc;
}

.doc-lesson-subtitle {
  font-size: 0.96rem;
  color: #475569;
  margin-bottom: 14px;
}

[data-theme="dark"] .doc-lesson-subtitle {
  color: #94a3b8;
}

.doc-summary-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 0.92rem;
  color: #1e3a8a;
  margin: 14px 0;
}

[data-theme="dark"] .doc-summary-box {
  background: rgba(30, 58, 138, 0.25);
  border-color: #1e40af;
  color: #93c5fd;
}

.doc-takeaways-card {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: 10px;
  padding: 14px 18px;
  margin: 16px 0;
}

[data-theme="dark"] .doc-takeaways-card {
  background: rgba(20, 83, 45, 0.25);
  border-color: #166534;
  color: #86efac;
}

.doc-takeaways-card h4 {
  margin: 0 0 8px 0;
  color: #15803d;
  font-size: 0.95rem;
}

.doc-takeaways-card ul {
  margin: 0;
  padding-right: 20px;
  font-size: 0.9rem;
}

/* فواصل الأقسام الكبرى */
.doc-block-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 35px 0 20px 0;
  position: relative;
}

.doc-block-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: #cbd5e1;
  z-index: 1;
}

.doc-block-divider span {
  position: relative;
  z-index: 2;
  background: #ffffff;
  padding: 5px 16px;
  border-radius: 20px;
  border: 1px solid #cbd5e1;
  font-weight: 700;
  font-size: 0.88rem;
  color: #1e40af;
}

[data-theme="dark"] .doc-block-divider span {
  background: #0f172a;
  color: #60a5fa;
  border-color: #334155;
}

/* بطاقات أقسام الشرح والقوانين */
.doc-section-card {
  margin-bottom: 30px;
  padding: 20px;
  border-radius: 10px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
}

[data-theme="dark"] .doc-section-card {
  background: #1e293b;
  border-color: #334155;
}

.doc-section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.doc-sec-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #2563eb;
  color: #ffffff;
  font-weight: 700;
  font-size: 0.85rem;
}

.doc-section-header h3 {
  font-size: 1.18rem;
  color: #0f172a;
  margin: 0;
}

[data-theme="dark"] .doc-section-header h3 {
  color: #f1f5f9;
}

.doc-notes-callout {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
  font-size: 0.88rem;
}

[data-theme="dark"] .doc-notes-callout {
  background: rgba(146, 64, 14, 0.25);
  border-color: #92400e;
  color: #fde68a;
}

.doc-example-card,
.doc-question-card {
  margin-bottom: 20px;
  padding: 18px;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

[data-theme="dark"] .doc-example-card,
[data-theme="dark"] .doc-question-card {
  background: #1e293b;
  border-color: #334155;
}

.doc-solution-box,
.doc-answer-box {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  font-size: 0.88rem;
}

[data-theme="dark"] .doc-solution-box,
[data-theme="dark"] .doc-answer-box {
  background: rgba(6, 95, 70, 0.25);
  border-color: #065f46;
  color: #a7f3d0;
}

.doc-footer-end {
  text-align: center;
  padding: 30px;
  color: #94a3b8;
  font-weight: 700;
  font-size: 0.88rem;
  border-top: 1px dashed #cbd5e1;
  margin-top: 40px;
}

/* نافذة اختيار الموضوع Modal */
.studio-topic-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.studio-topic-dialog {
  background: #ffffff;
  border-radius: 18px;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

[data-theme="dark"] .studio-topic-dialog {
  background: #1e293b;
  border-color: #334155;
}

.topic-dialog-header {
  padding: 14px 20px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
}

[data-theme="dark"] .topic-dialog-header {
  background: #0f172a;
  border-color: #334155;
}

.topic-search-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #cbd5e1;
  font-family: inherit;
  font-size: 0.95rem;
  margin-top: 10px;
  outline: none;
}

.topic-tabs-bar {
  display: flex;
  gap: 6px;
  padding: 10px 20px 0;
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
  overflow-x: auto;
}

[data-theme="dark"] .topic-tabs-bar {
  background: #0f172a;
  border-color: #334155;
}

.topic-tab-item {
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: #64748b;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.topic-tab-item.active {
  color: #2563eb;
  border-color: #2563eb;
}

.topic-dialog-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 20px;
}

.topic-item-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  background: #ffffff;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.16s ease;
}

[data-theme="dark"] .topic-item-card {
  background: #0f172a;
  border-color: #334155;
}

.topic-item-card:hover {
  background: #f8fafc;
  border-color: #3b82f6;
  transform: translateX(-3px);
}

.topic-item-card.is-current {
  border-color: #2563eb;
  background: #eff6ff;
}

[data-theme="dark"] .topic-item-card.is-current {
  background: rgba(37, 99, 235, 0.2);
}

.topic-item-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topic-has-notes-badge {
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 12px;
  background: #ecfdf5;
  color: #059669;
  font-weight: 700;
  border: 1px solid #a7f3d0;
}

.lesson-canvas-open-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #ffffff;
  border: none;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(217, 119, 6, 0.25);
  transition: all 0.2s ease;
}

.lesson-canvas-open-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(217, 119, 6, 0.4);
}

/* إشعار عائم Toast */
.studio-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1e293b;
  color: #ffffff;
  padding: 10px 20px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 8px;
}

.studio-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* إدخال نص مطبوع */
.canvas-inline-textbox {
  position: absolute;
  min-width: 140px;
  min-height: 40px;
  padding: 6px 10px;
  border: 2px dashed #2563eb;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  font-family: 'Cairo', sans-serif;
  font-size: 16px;
  outline: none;
  resize: both;
  overflow: auto;
  z-index: 30;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

/* التجاوب مع مختلف شاشات التابلت */
@media (max-width: 900px) {
  .studio-topbar-ipad {
    height: auto;
    padding: 6px 10px;
    gap: 6px;
  }
  .studio-topic-picker-btn {
    max-width: 200px;
  }
  .studio-doc-content {
    padding: 30px 40px;
  }
}