/* ==========================================================================
   DEUTSCHLERNEN - LESEN STUDIO & INTERACTIVE READER (READLANG + TODAII HYBRID)
   B1 Leseverstehen Exam Prep, Instant Tap-to-Translate & Comprehension Studio
   ========================================================================== */

:root {
  --ls-bg-primary: #0a0e17;
  --ls-bg-card: rgba(18, 24, 38, 0.78);
  --ls-bg-card-hover: rgba(26, 34, 53, 0.9);
  --ls-bg-input: rgba(15, 23, 42, 0.7);
  --ls-border-card: rgba(255, 255, 255, 0.08);
  --ls-border-accent: rgba(59, 130, 246, 0.35);

  --ls-text-main: #f8fafc;
  --ls-text-muted: #94a3b8;
  --ls-text-gold: #fbbf24;

  --ls-accent-primary: #3b82f6;
  --ls-accent-glow: rgba(59, 130, 246, 0.35);
  --ls-accent-success: #10b981;
  --ls-accent-danger: #ef4444;
  --ls-accent-warning: #f59e0b;
  --ls-accent-purple: #8b5cf6;

  --ls-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --ls-radius-sm: 8px;
  --ls-radius-md: 14px;
  --ls-radius-lg: 20px;
  --ls-radius-full: 9999px;
  --ls-transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  --ls-shadow-pop: 0 16px 36px -8px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.12);
}

[data-theme="light"], body.light-mode {
  --ls-bg-primary: #f8fafc;
  --ls-bg-card: rgba(255, 255, 255, 0.92);
  --ls-bg-card-hover: #ffffff;
  --ls-bg-input: #f1f5f9;
  --ls-border-card: rgba(0, 0, 0, 0.08);
  --ls-border-accent: rgba(59, 130, 246, 0.5);

  --ls-text-main: #0f172a;
  --ls-text-muted: #475569;
  --ls-text-gold: #b45309;

  --ls-shadow-pop: 0 16px 36px -8px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.08);
}

/* Base Body */
body.ls-body {
  margin: 0;
  padding: 0;
  background-color: var(--ls-bg-primary);
  background-image:
    radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(16, 185, 129, 0.08) 0%, transparent 45%);
  background-attachment: fixed;
  color: var(--ls-text-main);
  font-family: var(--ls-font-sans);
  line-height: 1.6;
  min-height: 100vh;
}

.ls-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px 20px 80px;
}

/* Header & Top Bar */
.ls-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--ls-border-card);
  margin-bottom: 24px;
}

.ls-brand-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ls-brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, #10b981, #059669);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

.ls-brand-title {
  font-size: 20px;
  font-weight: 800;
  margin: 0;
  color: var(--ls-text-main);
  letter-spacing: -0.02em;
}

.ls-brand-subtitle {
  font-size: 12px;
  color: var(--ls-text-muted);
  margin: 2px 0 0;
  font-weight: 500;
}

.ls-nav-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ls-nav-link {
  color: var(--ls-text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 11px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  transition: var(--ls-transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.ls-nav-link:hover {
  color: var(--ls-text-main);
  background: var(--ls-bg-card);
  border-color: var(--ls-border-card);
  transform: none;
}

.ls-lang-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--ls-bg-card);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  padding: 3px;
  gap: 2px;
}

.ls-lang-btn {
  background: transparent;
  border: none;
  color: var(--ls-text-muted);
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--ls-transition);
}

.ls-lang-btn:hover {
  color: var(--ls-text-main);
}

.ls-lang-btn.active {
  background: var(--ls-accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--ls-accent-glow);
}

.ls-btn-icon {
  background: transparent;
  border: 1px solid transparent;
  color: var(--ls-text-muted);
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: var(--ls-transition);
}

.ls-btn-icon:hover {
  color: var(--ls-text-main);
  background: var(--ls-bg-card);
  border-color: var(--ls-border-card);
}

/* Part Tabs Navigation */
.ls-part-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.ls-part-btn {
  background: var(--ls-bg-card);
  border: 1px solid var(--ls-border-card);
  color: var(--ls-text-muted);
  padding: 10px 18px;
  border-radius: var(--ls-radius-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: var(--ls-transition);
}

.ls-part-btn:hover {
  color: var(--ls-text-main);
  background: var(--ls-bg-card-hover);
}

.ls-part-btn.active {
  background: var(--ls-accent-primary);
  border-color: var(--ls-accent-primary);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Split Grid Layout */
.ls-layout-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 24px;
  align-items: start;
}

@media (min-width: 993px) {
  #reader-card {
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    scrollbar-width: thin;
  }
  #studio-panel {
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    scrollbar-width: thin;
    position: sticky;
    top: 20px;
  }
}

@media (max-width: 992px) {
  .ls-layout-grid {
    grid-template-columns: 1fr;
  }
}

/* Cards */
.ls-card {
  background: var(--ls-bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-lg);
  padding: 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  margin-bottom: 24px;
  transition: var(--ls-transition);
}

/* Reader Card Header & Toolbar */
.ls-reader-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ls-border-card);
}

.ls-meta-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ls-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--ls-radius-full);
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.ls-badge.badge-level {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.3);
}

.ls-badge.badge-time {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.3);
}

.ls-reader-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ls-tool-btn {
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  color: var(--ls-text-muted);
  padding: 6px 12px;
  border-radius: var(--ls-radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--ls-transition);
}

.ls-tool-btn:hover {
  color: var(--ls-text-main);
  border-color: var(--ls-accent-primary);
}

.ls-tool-btn.active {
  background: var(--ls-accent-primary);
  color: #ffffff;
  border-color: var(--ls-accent-primary);
}

/* Reader Typography & Interactive Tokens */
.ls-article-title {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--ls-text-main);
}

.ls-article-summary {
  font-size: 14px;
  color: var(--ls-text-muted);
  line-height: 1.6;
  margin: 0 0 20px;
  padding: 12px 16px;
  background: var(--ls-bg-input);
  border-radius: var(--ls-radius-md);
  border-left: 3px solid var(--ls-accent-primary);
}

.ls-article-body {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ls-text-main);
  user-select: text;
}

.ls-article-body.font-lg {
  font-size: 18px;
  line-height: 1.95;
}

.ls-article-body.font-xl {
  font-size: 20px;
  line-height: 2.1;
}

.ls-paragraph {
  margin-bottom: 20px;
  padding: 8px 12px;
  border-radius: var(--ls-radius-md);
  transition: background-color 0.4s ease, border-left 0.4s ease;
}

.ls-paragraph.highlight-target {
  background-color: rgba(245, 158, 11, 0.18);
  border-left: 4px solid var(--ls-accent-warning);
  animation: pulseHighlight 2s cubic-bezier(0.4, 0, 0.6, 1);
}

@keyframes pulseHighlight {
  0%, 100% { background-color: rgba(245, 158, 11, 0.18); }
  50% { background-color: rgba(245, 158, 11, 0.32); }
}

/* Word Token (Readlang Interactive Tap-to-Lookup) */
.w-tok {
  display: inline;
  padding: 2px 2px;
  margin: 0 -1px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.w-tok:hover {
  background: rgba(59, 130, 246, 0.25);
  color: #60a5fa;
}

.w-tok.has-glossary {
  border-bottom: 1.5px dotted rgba(16, 185, 129, 0.65);
}

.w-tok.saved-word {
  background: rgba(245, 158, 11, 0.22);
  color: var(--ls-text-gold);
  border-bottom: 1.5px solid var(--ls-text-gold);
}

.w-tok.active-speaking {
  background: rgba(16, 185, 129, 0.35);
  color: #ffffff;
}

.w-tok.active-lookup {
  background: rgba(99, 102, 241, 0.38);
  color: #ffffff;
  border-radius: 4px;
  box-shadow: 0 0 0 2px rgba(129, 140, 248, 0.85);
}

/* Right Studio Panel: Tabs */
.ls-studio-tabs {
  display: flex;
  background: var(--ls-bg-input);
  border-radius: var(--ls-radius-md);
  padding: 4px;
  margin-bottom: 18px;
  gap: 4px;
}

.ls-studio-tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--ls-text-muted);
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--ls-transition);
}

.ls-studio-tab-btn:hover {
  color: var(--ls-text-main);
}

.ls-studio-tab-btn.active {
  background: var(--ls-bg-card);
  color: var(--ls-text-main);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

/* Exam Timer Strip */
.ls-timer-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  padding: 10px 16px;
  margin-bottom: 18px;
}

.ls-timer-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ls-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ls-timer-digits {
  font-family: monospace;
  font-size: 18px;
  font-weight: 800;
  color: var(--ls-text-gold);
}

.ls-timer-btn {
  background: transparent;
  border: 1px solid var(--ls-border-card);
  color: var(--ls-text-main);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--ls-transition);
}

.ls-timer-btn:hover {
  border-color: var(--ls-accent-primary);
}

/* Questions Arena */
.ls-q-card {
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  padding: 16px;
  margin-bottom: 16px;
  transition: var(--ls-transition);
}

.ls-q-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}

.ls-q-number {
  font-size: 12px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.ls-btn-locate {
  background: transparent;
  border: 1px solid var(--ls-border-card);
  color: var(--ls-text-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--ls-transition);
}

.ls-btn-locate:hover {
  color: var(--ls-accent-warning);
  border-color: var(--ls-accent-warning);
}

.ls-q-prompt {
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ls-text-main);
  margin-bottom: 12px;
}

.ls-q-prompt-de {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ls-text-main);
}

.ls-q-prompt-sub {
  font-size: 13px;
  color: var(--ls-text-muted);
  margin-top: 8px;
  font-weight: 500;
  background: rgba(59, 130, 246, 0.08);
  border-left: 3px solid var(--ls-accent-primary);
  border-radius: var(--ls-radius-sm);
  padding: 6px 10px;
  line-height: 1.5;
  animation: lsFadeIn 0.2s ease-in-out;
}

.ls-btn-trans-toggle {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--ls-transition);
}

.ls-btn-trans-toggle:hover {
  background: rgba(59, 130, 246, 0.25);
  color: #ffffff;
  transform: translateY(-1px);
}

@keyframes lsFadeIn {
  from { opacity: 0; transform: translateY(-3px); }
  to { opacity: 1; transform: translateY(0); }
}

.ls-options-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ls-opt-btn {
  background: var(--ls-bg-card);
  border: 1px solid var(--ls-border-card);
  color: var(--ls-text-main);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  transition: var(--ls-transition);
  position: relative;
}

.ls-opt-btn:hover:not(.locked) {
  background: var(--ls-bg-card-hover);
  border-color: var(--ls-accent-primary);
  transform: translateX(2px);
}

.ls-opt-btn.locked,
.ls-opt-btn:disabled {
  pointer-events: none;
  cursor: default;
}

.ls-opt-btn.selected-correct {
  background: rgba(16, 185, 129, 0.15) !important;
  border-color: var(--ls-accent-success) !important;
  color: #34d399 !important;
  font-weight: 700;
}

.ls-opt-btn.selected-wrong {
  background: rgba(239, 68, 68, 0.15) !important;
  border-color: var(--ls-accent-danger) !important;
  color: #f87171 !important;
  font-weight: 700;
}

.ls-opt-letter {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--ls-bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 1px;
}

.ls-opt-content {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  text-align: left;
}

.ls-opt-text {
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ls-text-main);
}

.ls-opt-trans {
  font-size: 12px;
  font-weight: 400;
  color: var(--ls-text-muted);
  line-height: 1.35;
}

.ls-explanation-box {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.1);
  border-left: 3px solid var(--ls-accent-primary);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ls-text-main);
}

/* Readlang Popover Dialog / Tooltip */
.ls-lookup-modal {
  box-sizing: border-box;
  position: fixed;
  z-index: 9999;
  background: var(--ls-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--ls-border-accent);
  border-radius: var(--ls-radius-lg);
  box-shadow: var(--ls-shadow-pop);
  width: 360px;
  max-width: 92vw;
  max-height: 85vh;
  overflow-y: auto;
  padding: 18px;
  display: none;
  animation: popIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.ls-lookup-modal::-webkit-scrollbar {
  width: 5px;
}

.ls-lookup-modal::-webkit-scrollbar-track {
  background: transparent;
}

.ls-lookup-modal::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  border-radius: 4px;
}

.ls-lookup-modal.active {
  display: block;
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.95) translateY(6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.ls-lookup-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.ls-lookup-word {
  font-size: 20px;
  font-weight: 800;
  color: var(--ls-text-main);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ls-art-badge {
  font-size: 11px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: lowercase;
}

.ls-art-der { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.ls-art-die { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.ls-art-das { background: rgba(16, 185, 129, 0.2); color: #34d399; }

.ls-form-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
}

.ls-lookup-close {
  background: transparent;
  border: none;
  color: var(--ls-text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 2px 6px;
}

.ls-lookup-close:hover {
  color: var(--ls-text-main);
}

.ls-lookup-trans {
  font-size: 15px;
  font-weight: 700;
  color: var(--ls-text-gold);
  margin-bottom: 6px;
  line-height: 1.35;
}

.ls-lookup-meta {
  font-size: 12px;
  color: var(--ls-text-muted);
  margin-bottom: 12px;
}

/* Grammar Insight Box */
.ls-lookup-grammar {
  margin: 10px 0;
  padding: 10px 12px;
  background: rgba(168, 85, 247, 0.12);
  border-left: 3px solid #a855f7;
  border-radius: 8px;
}

.ls-lookup-section-title {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #c084fc;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
}

.ls-grammar-content {
  color: var(--ls-text-main);
  font-size: 12px;
  line-height: 1.45;
}

/* Multiple Example Sentences Section */
.ls-lookup-examples {
  margin: 12px 0 8px 0;
}

.ls-lookup-examples .ls-lookup-section-title {
  color: #38bdf8;
}

.ls-examples-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 6px;
}

.ls-example-item {
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--ls-border-card);
  border-radius: 6px;
  font-size: 12px;
  line-height: 1.4;
}

.ls-example-de {
  color: var(--ls-text-main);
  font-weight: 600;
  margin-bottom: 3px;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.ls-example-idx {
  color: var(--ls-text-muted);
  font-size: 10px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 4px;
  border-radius: 3px;
  flex-shrink: 0;
  margin-top: 1px;
}

.ls-example-trans {
  color: var(--ls-text-muted);
  font-size: 11.5px;
  padding-left: 20px;
  font-style: italic;
  line-height: 1.35;
}

.ls-lookup-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--ls-border-card);
}

.ls-btn-save-vocab {
  flex: 1;
  background: var(--ls-accent-primary);
  border: none;
  color: #ffffff;
  padding: 8px 12px;
  border-radius: var(--ls-radius-md);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--ls-transition);
}

.ls-btn-save-vocab.saved {
  background: var(--ls-accent-success);
}

.ls-btn-pronounce {
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  color: var(--ls-text-main);
  padding: 8px 12px;
  border-radius: var(--ls-radius-md);
  font-size: 14px;
  cursor: pointer;
  transition: var(--ls-transition);
}

.ls-btn-pronounce:hover {
  border-color: var(--ls-accent-primary);
}

/* Saved Vocabulary Deck List */
.ls-vocab-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 480px;
  overflow-y: auto;
  padding-right: 4px;
}

.ls-vocab-item {
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  transition: var(--ls-transition);
}

.ls-vocab-item:hover {
  border-color: var(--ls-border-accent);
}

.ls-vocab-de {
  font-weight: 700;
  font-size: 14px;
  color: var(--ls-text-main);
}

.ls-vocab-tr {
  font-size: 12px;
  color: var(--ls-text-gold);
  margin-top: 2px;
}

.ls-vocab-del {
  background: transparent;
  border: none;
  color: var(--ls-text-muted);
  cursor: pointer;
  padding: 4px 6px;
  font-size: 14px;
  border-radius: 4px;
}

.ls-vocab-del:hover {
  color: var(--ls-accent-danger);
}

/* RTL Support for Arabic */
[dir="rtl"] .ls-article-summary,
body[data-lang="ar"] .ls-article-summary {
  border-left: none;
  border-right: 3px solid var(--ls-accent-primary);
}

[dir="rtl"] .ls-opt-btn,
body[data-lang="ar"] .ls-opt-btn {
  text-align: right;
  flex-direction: row-reverse;
}

[dir="rtl"] .ls-opt-content,
body[data-lang="ar"] .ls-opt-content {
  text-align: right;
}

[dir="rtl"] .ls-opt-text,
body[data-lang="ar"] .ls-opt-text {
  direction: ltr;
  text-align: left;
}

[dir="rtl"] .ls-explanation-box,
body[data-lang="ar"] .ls-explanation-box {
  border-left: none;
  border-right: 3px solid var(--ls-accent-primary);
}

/* ==========================================================================
   SPRACHBAUSTEINE & TRACK SWITCHER STYLES
   ========================================================================== */
.ls-track-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--ls-bg-card);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  padding: 8px 12px;
  margin-bottom: 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.ls-track-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ls-track-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-full);
  color: var(--ls-text-muted);
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--ls-transition);
}

.ls-track-pill:hover {
  color: var(--ls-text-main);
  border-color: var(--ls-border-accent);
}

.ls-track-pill.active {
  background: var(--ls-accent-primary);
  border-color: var(--ls-accent-primary);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.ls-track-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--ls-text-gold);
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.25);
  padding: 5px 12px;
  border-radius: var(--ls-radius-full);
}

/* Inline Gap Pill in Text Template */
.sb-gap-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 90px;
  height: 28px;
  padding: 2px 10px;
  margin: 0 4px;
  background: rgba(59, 130, 246, 0.12);
  border: 1.5px dashed var(--ls-accent-primary);
  border-radius: var(--ls-radius-sm);
  color: var(--ls-accent-primary);
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  vertical-align: middle;
  transition: var(--ls-transition);
}

.sb-gap-pill:hover, .sb-gap-pill.focused {
  background: rgba(59, 130, 246, 0.25);
  border-style: solid;
  transform: translateY(-1px);
}

.sb-gap-pill.filled {
  border-style: solid;
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
}

.sb-gap-pill.correct {
  border-color: var(--ls-accent-success);
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.sb-gap-pill.incorrect {
  border-color: var(--ls-accent-danger);
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
}

/* Word Bank Chips (Teil 2) */
.sb-wordbank-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding: 14px;
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
}

.sb-word-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--ls-bg-card);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-sm);
  font-size: 13px;
  font-weight: 700;
  color: var(--ls-text-main);
  cursor: pointer;
  transition: var(--ls-transition);
}

.sb-word-chip:hover {
  border-color: var(--ls-accent-primary);
  background: rgba(59, 130, 246, 0.15);
}

.sb-word-chip.used {
  opacity: 0.45;
  text-decoration: line-through;
  cursor: not-allowed;
}

.sb-word-chip .chip-key {
  color: var(--ls-accent-primary);
  font-size: 11px;
}

/* Question / Item Card in Sidebar */
.sb-item-card {
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  padding: 14px;
  margin-bottom: 12px;
  transition: var(--ls-transition);
}

.sb-item-card.active-focus {
  border-color: var(--ls-accent-primary);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.25);
}

.sb-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 8px;
  color: var(--ls-text-muted);
}

.sb-options-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.sb-opt-pill {
  padding: 8px 10px;
  background: var(--ls-bg-card);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-sm);
  color: var(--ls-text-main);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: var(--ls-transition);
}

.sb-opt-pill:hover {
  border-color: var(--ls-border-accent);
}

.sb-opt-pill.selected {
  background: var(--ls-accent-primary);
  border-color: #2563eb;
  color: #ffffff;
}

.sb-opt-pill.opt-correct {
  background: rgba(16, 185, 129, 0.25);
  border-color: var(--ls-accent-success);
  color: #34d399;
}

.sb-opt-pill.opt-wrong {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--ls-accent-danger);
  color: #f87171;
}

.sb-rule-box {
  margin-top: 10px;
  padding: 10px 12px;
  background: rgba(251, 191, 36, 0.08);
  border-left: 3px solid var(--ls-accent-warning);
  border-radius: 4px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ls-text-main);
}

/* Active Gap Glowing Pill State */
.sb-gap-pill.active-gap {
  border-style: solid;
  border-color: #60a5fa;
  background: rgba(59, 130, 246, 0.35);
  color: #ffffff;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.45), 0 4px 14px rgba(59, 130, 246, 0.4);
  transform: translateY(-1px) scale(1.05);
  animation: pulseActiveGap 1.8s infinite ease-in-out;
}

@keyframes pulseActiveGap {
  0%, 100% {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.45), 0 4px 14px rgba(59, 130, 246, 0.35);
  }
  50% {
    box-shadow: 0 0 0 5px rgba(59, 130, 246, 0.25), 0 6px 18px rgba(59, 130, 246, 0.5);
  }
}

/* Mode Switcher Pills (Interactive vs Exam) */
.ls-sb-mode-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-full);
  padding: 3px;
  gap: 2px;
}

.ls-mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: transparent;
  border: none;
  border-radius: var(--ls-radius-full);
  color: var(--ls-text-muted);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--ls-transition);
}

.ls-mode-btn:hover {
  color: var(--ls-text-main);
}

.ls-mode-btn.active {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.4);
}

/* ==========================================================================
   FLOATING WORD DOCK (MOBILE-OPTIMIZED / INTERACTIVE SPRACHBAUSTEINE)
   ========================================================================== */
.sb-floating-dock {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 850;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1.5px solid rgba(59, 130, 246, 0.45);
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
  padding-bottom: max(8px, env(safe-area-inset-bottom));
}

[data-theme="light"] .sb-floating-dock,
body.light-mode .sb-floating-dock {
  background: rgba(255, 255, 255, 0.96);
  border-top: 1.5px solid rgba(59, 130, 246, 0.45);
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.12);
}

.sb-floating-dock.dock-collapsed .sb-dock-body {
  display: none;
}

.sb-floating-dock.dock-collapsed .sb-dock-header {
  margin-bottom: 0;
}

.sb-dock-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 10px 16px 6px;
}

.sb-dock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.sb-dock-target {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sb-dock-gap-badge {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--ls-radius-full);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
  letter-spacing: 0.02em;
}

.sb-dock-curr-word {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ls-text-gold);
}

.sb-dock-nav {
  display: flex;
  gap: 4px;
}

.sb-dock-icon-btn {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ls-bg-input);
  border: 1px solid var(--ls-border-card);
  border-radius: var(--ls-radius-sm);
  color: var(--ls-text-main);
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: var(--ls-transition);
}

.sb-dock-icon-btn:hover {
  background: var(--ls-bg-card-hover);
  border-color: var(--ls-accent-primary);
}

.sb-dock-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sb-dock-btn-clear {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--ls-radius-sm);
  color: #f87171;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--ls-transition);
}

.sb-dock-btn-clear:hover {
  background: rgba(239, 68, 68, 0.25);
  border-color: #ef4444;
}

.sb-dock-body {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 8px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

/* Teil 1 Pills inside dock */
.sb-dock-opt-btn {
  flex: 1;
  min-width: 90px;
  padding: 10px 14px;
  background: var(--ls-bg-card);
  border: 1.5px solid var(--ls-border-card);
  border-radius: var(--ls-radius-md);
  color: var(--ls-text-main);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition: var(--ls-transition);
  white-space: nowrap;
}

.sb-dock-opt-btn:hover {
  border-color: var(--ls-accent-primary);
  transform: translateY(-1px);
}

.sb-dock-opt-btn.selected {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border-color: #3b82f6;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

/* Teil 2 Chips inside dock */
.sb-dock-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--ls-bg-card);
  border: 1.5px solid var(--ls-border-card);
  border-radius: var(--ls-radius-sm);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ls-text-main);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: var(--ls-transition);
}

.sb-dock-chip:hover {
  border-color: var(--ls-accent-primary);
  background: rgba(59, 130, 246, 0.15);
  transform: translateY(-1px);
}

.sb-dock-chip.selected {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border-color: #3b82f6;
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.35);
}

.sb-dock-chip.used {
  opacity: 0.4;
  text-decoration: line-through;
  background: var(--ls-bg-input);
}

.sb-dock-chip .chip-key {
  color: var(--ls-accent-primary);
  font-size: 11px;
}

.sb-dock-chip.selected .chip-key {
  color: #ffffff;
}

/* Extra bottom padding on body when dock is visible */
body.sb-dock-active .ls-container {
  padding-bottom: 200px;
}

@media (max-width: 768px) {
  .sb-dock-body {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
  }
}

@media (max-width: 768px), (pointer: coarse) {
  .ls-nav-link,
  .ls-btn-icon,
  .ls-part-btn,
  .ls-track-pill {
    min-height: 44px;
    min-width: 44px;
  }
}