/* ========================================================
   شرح العقائد النسفية - Design System & Modern UI
   Vanilla CSS with rich aesthetics, glassmorphism & responsive layouts
======================================================== */

:root {
  /* Classical Dars / Parchment Palette */
  --bg-primary: #0d131a;
  --bg-secondary: #141d27;
  --bg-card: rgba(26, 38, 52, 0.75);
  --bg-glass: rgba(22, 33, 46, 0.65);
  --border-color: rgba(212, 175, 55, 0.22);
  --border-focus: #e6ca65;
  
  /* Text Colors */
  --text-main: #f0f4f8;
  --text-muted: #9fb0c3;
  --text-arabic: #fdfaf2;
  --text-accent: #e5c05d; /* Golden parchment */
  
  /* Highlights & Status */
  --gold-glow: rgba(229, 192, 93, 0.25);
  --gold-primary: #d4af37;
  --teal-accent: #2dd4bf;
  --blue-accent: #38bdf8;
  --purple-accent: #c084fc;
  --red-alert: #f87171;
  --green-success: #34d399;
  
  /* Fonts */
  --font-arabic: 'Amiri', serif;
  --font-urdu: 'Noto Nastaliq Urdu', 'Noto Sans Arabic', serif;
  --font-ui: 'Noto Sans Arabic', 'Outfit', sans-serif;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.45);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light / Classical Scholar Theme */
body.theme-light {
  --bg-primary: #f8f6f0;
  --bg-secondary: #f0ebe1;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.75);
  --border-color: rgba(180, 140, 40, 0.25);
  --border-focus: #b8860b;
  --text-main: #23272d;
  --text-muted: #5e6875;
  --text-arabic: #1a1e24;
  --text-accent: #9b6d08;
  --gold-glow: rgba(180, 140, 40, 0.15);
  --shadow-sm: 0 4px 12px rgba(90, 70, 20, 0.08);
  --shadow-lg: 0 12px 32px rgba(90, 70, 20, 0.14);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-ui);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.8;
  min-height: 100vh;
  direction: rtl;
  text-align: right;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(212, 175, 55, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(56, 189, 248, 0.03) 0%, transparent 40%);
/* LMS Top Navigation Utility Bar */
.lms-top-nav {
  background: rgba(10, 15, 22, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 175, 55, 0.18);
  font-family: var(--font-ui);
  padding: 0.45rem 1.5rem;
  position: relative;
  z-index: 101;
  font-size: 0.86rem;
}

body.theme-light .lms-top-nav {
  background: rgba(243, 239, 230, 0.95);
  border-bottom: 1px solid rgba(180, 140, 40, 0.22);
}

.lms-nav-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.lms-nav-links {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.lms-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  text-decoration: none !important;
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}

.lms-nav-btn .lms-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.lms-btn-topics {
  background: rgba(229, 192, 93, 0.12);
  color: var(--text-accent) !important;
  border-color: rgba(229, 192, 93, 0.3);
}

.lms-btn-topics:hover {
  background: rgba(229, 192, 93, 0.22);
  border-color: var(--gold-primary);
  transform: translateY(-1px);
  box-shadow: 0 2px 10px rgba(229, 192, 93, 0.2);
}

.lms-btn-home {
  background: rgba(45, 212, 191, 0.1);
  color: #2dd4bf !important;
  border-color: rgba(45, 212, 191, 0.25);
}

body.theme-light .lms-btn-home {
  color: #0d9488 !important;
  background: rgba(13, 148, 136, 0.1);
  border-color: rgba(13, 148, 136, 0.25);
}

.lms-btn-home:hover {
  background: rgba(45, 212, 191, 0.2);
  border-color: #2dd4bf;
  transform: translateY(-1px);
  box-shadow: 0 2px 10px rgba(45, 212, 191, 0.2);
}

.lms-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.lms-breadcrumb .crumb-root {
  font-weight: 700;
  color: var(--text-accent);
}

.lms-breadcrumb .crumb-sep {
  opacity: 0.45;
  font-size: 0.75rem;
}

.lms-breadcrumb .crumb-active {
  color: var(--text-main);
  font-weight: 600;
}

.lms-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.28);
  color: #34d399;
  font-size: 0.78rem;
  font-weight: 600;
}

body.theme-light .lms-status-badge {
  color: #059669;
  background: rgba(5, 150, 105, 0.1);
  border-color: rgba(5, 150, 105, 0.25);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  animation: pulseDotAnim 2s infinite;
}

body.theme-light .pulse-dot {
  background: #059669;
}

@keyframes pulseDotAnim {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 6px rgba(52, 211, 153, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(52, 211, 153, 0);
  }
}

@media (max-width: 768px) {
  .lms-breadcrumb {
    display: none;
  }
  .lms-nav-container {
    justify-content: space-between;
  }
}

/* App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem 0.5rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.badge-islamic {
  display: inline-block;
  background: rgba(212, 175, 55, 0.15);
  color: var(--text-accent);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  padding: 0.2rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.main-title {
  font-family: var(--font-arabic);
  font-size: 2.1rem;
  color: var(--text-accent);
  margin-top: 0.2rem;
  font-weight: 700;
  text-shadow: 0 2px 8px var(--gold-glow);
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 700px;
}

.header-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.action-btn:hover {
  border-color: var(--border-focus);
  box-shadow: 0 0 12px var(--gold-glow);
  transform: translateY(-2px);
}

.action-btn.secondary {
  background: transparent;
  color: var(--text-muted);
}
.action-btn.secondary:hover {
  color: var(--text-main);
}

/* Navigation Tabs */
.nav-tabs {
  max-width: 1300px;
  margin: 0.8rem auto 0 auto;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.3rem;
  scrollbar-width: thin;
}

.nav-tabs::-webkit-scrollbar {
  height: 4px;
}
.nav-tabs::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.nav-btn {
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 0.6rem 1.1rem;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.nav-btn:hover {
  color: var(--text-accent);
  background: rgba(212, 175, 55, 0.05);
}

.nav-btn.active {
  color: var(--text-accent);
  border-bottom-color: var(--text-accent);
  background: rgba(212, 175, 55, 0.08);
}

.nav-btn.highlight-tab {
  color: var(--teal-accent);
  background: rgba(45, 212, 191, 0.07);
}
.nav-btn.highlight-tab.active {
  border-bottom-color: var(--teal-accent);
}

/* Container */
.main-container {
  max-width: 1300px;
  margin: 1.8rem auto 3rem auto;
  padding: 0 1.5rem;
}

/* Tab Panels */
.tab-pane {
  display: none;
  animation: fadeIn 0.3s ease;
}
.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero Section */
.hero-card {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), rgba(20, 30, 42, 0.85));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.8rem;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: '﷽';
  position: absolute;
  left: 2%;
  bottom: -20px;
  font-family: var(--font-arabic);
  font-size: 8rem;
  opacity: 0.04;
  pointer-events: none;
  color: var(--gold-primary);
}

.hero-tag {
  background: var(--gold-primary);
  color: #111;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 0.6rem;
}

.hero-content h2 {
  font-size: 1.8rem;
  color: var(--text-arabic);
  margin-bottom: 0.7rem;
}

.hero-desc {
  max-width: 780px;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.hero-stats {
  display: flex;
  gap: 1.2rem;
}

.stat-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.4rem;
  text-align: center;
  min-width: 105px;
}

.stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-accent);
  font-family: var(--font-arabic);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Grids & Cards */
.grid-3-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.grid-2-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.5rem;
}

.mt-4 { margin-top: 2rem; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

.card:hover {
  border-color: var(--border-focus);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 0.8rem;
}

.feature-card h3 {
  font-size: 1.3rem;
  color: var(--text-accent);
  margin-bottom: 0.6rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

.badge-mini {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.78rem;
  background: rgba(212, 175, 55, 0.1);
  color: var(--text-accent);
  border-radius: 6px;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--border-color);
}

/* Terms Pills */
.terms-container {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
}

.section-title {
  font-size: 1.45rem;
  color: var(--text-accent);
  margin-bottom: 0.4rem;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}

.terms-grid {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-top: 1rem;
}

.term-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.6rem;
  transition: var(--transition);
}

.term-pill:hover {
  background: rgba(212, 175, 55, 0.08);
  border-color: var(--border-focus);
}

.term-ar {
  font-family: var(--font-arabic);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-accent);
  min-width: 140px;
}

.term-ur {
  font-size: 0.95rem;
  color: var(--text-main);
}

/* ================== TAB 2: TEXT & TRANSLATION ================== */
.section-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.view-controls {
  display: flex;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.3rem;
}

.filter-btn {
  background: transparent;
  border: none;
  padding: 0.4rem 0.9rem;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 6px;
  transition: var(--transition);
}

.filter-btn.active {
  background: var(--text-accent);
  color: #111;
}

.page-container {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.page-ribbon {
  display: inline-block;
  background: var(--text-accent);
  color: #111;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.25rem 1rem;
  border-radius: 30px;
  margin-bottom: 1.2rem;
}

.matn-box {
  background: rgba(212, 175, 55, 0.12);
  border-right: 4px solid var(--text-accent);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.5rem;
}

.matn-tag {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text-accent);
  display: block;
  margin-bottom: 0.3rem;
  letter-spacing: 0.5px;
}

.matn-text {
  font-family: var(--font-arabic);
  font-size: 1.7rem;
  font-weight: 700;
  color: #ff7675;
  line-height: 1.6;
}

.matn-ur {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-top: 0.3rem;
}

.parallel-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.8rem;
}

/* View Filtering Classes */
body.view-arabic-only .col-urdu { display: none !important; }
body.view-arabic-only .parallel-block { grid-template-columns: 1fr !important; }

body.view-urdu-only .col-arabic { display: none !important; }
body.view-urdu-only .parallel-block { grid-template-columns: 1fr !important; }

.col-arabic {
  background: rgba(15, 23, 34, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border-top: 3px solid var(--text-accent);
}

.col-urdu {
  background: rgba(15, 23, 34, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border-top: 3px solid var(--teal-accent);
}

.lang-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.arabic-p {
  font-family: var(--font-arabic);
  font-size: 1.45rem;
  line-height: 2.1;
  color: var(--text-arabic);
}

.highlight-text {
  color: #ff7675;
  font-weight: 700;
}

.footnote-ref {
  color: var(--teal-accent);
  cursor: help;
  font-weight: bold;
}

.hashiya-box {
  margin-top: 1.2rem;
  padding: 0.65rem 0.9rem;
  background: rgba(45, 212, 191, 0.08);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--teal-accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.urdu-p {
  font-size: 1.05rem;
  line-height: 2.0;
  color: var(--text-main);
  margin-bottom: 0.8rem;
}

.highlight-p {
  background: rgba(212, 175, 55, 0.07);
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  border-right: 3px solid var(--text-accent);
}

.styled-list {
  list-style: none;
  margin: 0.8rem 0;
}

.styled-list li {
  position: relative;
  padding-right: 1.5rem;
  margin-bottom: 0.7rem;
  font-size: 1rem;
  line-height: 1.8;
}

.styled-list li::before {
  content: '◄';
  position: absolute;
  right: 0;
  color: var(--teal-accent);
  font-size: 0.8rem;
}

/* ================== TAB 3: FLOWCHART ================== */
.flowchart-board {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  max-width: 900px;
  margin: 0 auto;
}

.flow-step {
  width: 100%;
}

.step-badge {
  background: var(--text-accent);
  color: #111;
  font-size: 0.82rem;
  font-weight: 800;
  padding: 0.2rem 0.9rem;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 0.4rem;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.8rem;
  box-shadow: var(--shadow-sm);
  text-align: right;
}

.step-card h4 {
  font-family: var(--font-arabic);
  font-size: 1.35rem;
  color: var(--text-accent);
  margin-bottom: 0.4rem;
}

.flow-arrow {
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed var(--border-color);
  color: var(--teal-accent);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.4rem 1.2rem;
  border-radius: 20px;
}

.flow-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  width: 100%;
}

.split-tag {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  display: inline-block;
  background: rgba(248, 113, 113, 0.15);
  color: var(--red-alert);
}

.split-tag.tag-success {
  background: rgba(52, 211, 153, 0.15);
  color: var(--green-success);
}

.warning-card {
  border-color: rgba(248, 113, 113, 0.35);
  background: rgba(248, 113, 113, 0.04);
}

.success-card {
  border-color: rgba(52, 211, 153, 0.35);
  background: rgba(52, 211, 153, 0.04);
}

.branch-consequence {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
}

.branch-consequence ul {
  list-style: none;
  margin-top: 0.4rem;
}

.branch-consequence li {
  margin-bottom: 0.3rem;
  padding-right: 1.2rem;
  position: relative;
}

.branch-consequence li::before {
  content: '❌';
  position: absolute;
  right: 0;
  font-size: 0.75rem;
}

.highlight-success {
  color: var(--green-success);
  font-size: 1rem;
}

.info-callout {
  background: rgba(56, 189, 248, 0.07);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
}

.callout-icon {
  font-size: 2rem;
}

.callout-body h4 {
  font-family: var(--font-arabic);
  font-size: 1.3rem;
  color: var(--blue-accent);
  margin-bottom: 0.5rem;
}

.callout-body p {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text-main);
}

/* ================== TAB 4: INTERACTIVE SIMULATOR ================== */
.simulator-wrapper {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  box-shadow: var(--shadow-lg);
}

.sim-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 2rem auto;
}

.sim-badge {
  display: inline-block;
  background: rgba(45, 212, 191, 0.15);
  color: var(--teal-accent);
  border: 1px solid rgba(45, 212, 191, 0.3);
  border-radius: 20px;
  padding: 0.25rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.sim-header h2 {
  font-size: 2rem;
  color: var(--text-accent);
  margin-bottom: 0.6rem;
}

.sim-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.visual-stage {
  background: rgba(9, 14, 20, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.8rem;
}

.series-container {
  min-width: 780px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
}

.series-row {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.series-label {
  min-width: 220px;
  text-align: right;
}

.series-name {
  display: block;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-accent);
}

.series-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.nodes-track {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  flex-grow: 1;
}

.node {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-main);
  transition: all 0.3s ease;
  position: relative;
  user-select: none;
}

.node .node-id {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.node.empty-slot {
  background: rgba(255, 255, 255, 0.02);
  border: 2px dashed rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.2);
}

.node.matched {
  background: rgba(45, 212, 191, 0.2);
  border-color: var(--teal-accent);
  color: var(--teal-accent);
  box-shadow: 0 0 14px rgba(45, 212, 191, 0.4);
  transform: scale(1.06);
}

.node.surplus {
  background: rgba(248, 113, 113, 0.25);
  border-color: var(--red-alert);
  color: var(--red-alert);
  box-shadow: 0 0 14px rgba(248, 113, 113, 0.5);
  animation: pulseSurplus 1.5s infinite alternate;
}

@keyframes pulseSurplus {
  from { transform: scale(1); }
  to { transform: scale(1.1); }
}

.node.infinite-ray {
  width: 75px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.alignment-area {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.4rem 0;
}

.tatbiq-line-guide {
  font-size: 0.85rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 0.2rem 1rem;
  border-radius: 20px;
}

/* Simulator Buttons */
.sim-controls {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.8rem;
}

.sim-btn {
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.sim-btn.primary {
  background: var(--teal-accent);
  color: #0b171e;
}
.sim-btn.primary:hover {
  background: #5eead4;
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.5);
}

.sim-btn.secondary {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-main);
}
.sim-btn.secondary:hover {
  border-color: var(--text-accent);
}

.sim-btn.warning {
  background: rgba(229, 192, 93, 0.15);
  border-color: var(--text-accent);
  color: var(--text-accent);
}
.sim-btn.warning:hover {
  background: var(--text-accent);
  color: #111;
}

.sim-btn.neutral {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-muted);
}
.sim-btn.neutral:hover {
  color: var(--text-main);
  border-color: var(--text-main);
}

/* Simulation Explanation Box */
.sim-output-card {
  background: rgba(20, 30, 42, 0.85);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  text-align: right;
  transition: all 0.3s ease;
}

.output-status-pill {
  display: inline-block;
  background: rgba(212, 175, 55, 0.15);
  color: var(--text-accent);
  border-radius: 20px;
  padding: 0.2rem 0.8rem;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.sim-output-card h3 {
  font-size: 1.4rem;
  color: var(--text-accent);
  margin-bottom: 0.5rem;
}

.sim-output-card p {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-main);
}

/* Dilemma Grid */
.dilemma-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.dilemma-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  transition: var(--transition);
}

.dilemma-card.active-dilemma {
  border-color: var(--teal-accent);
  box-shadow: 0 0 20px rgba(45, 212, 191, 0.25);
  background: rgba(45, 212, 191, 0.05);
}

.fork-num {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.2rem 0.7rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  margin-bottom: 0.6rem;
}

.dilemma-card h4 {
  font-family: var(--font-arabic);
  font-size: 1.25rem;
  color: var(--text-accent);
  margin-bottom: 0.4rem;
}

.arabic-quote {
  font-family: var(--font-arabic);
  font-size: 1.35rem;
  color: #ff7675;
  margin-bottom: 0.6rem;
  font-weight: 700;
}

.fork-desc {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.math-logic-box {
  background: rgba(45, 212, 191, 0.06);
  border: 1px solid rgba(45, 212, 191, 0.25);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.6rem;
  text-align: center;
}

.math-logic-box h4 {
  color: var(--teal-accent);
  margin-bottom: 0.4rem;
}

.math-formula {
  direction: ltr;
  unicode-bidi: isolate;
  font-family: 'Cambria Math', 'STIX Two Math', 'Segoe UI Symbol', 'Noto Sans Math', 'DejaVu Sans', 'Fira Code', 'Consolas', monospace;
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--text-accent);
  margin: 0.5rem 0;
  padding: 0.6rem 1rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-sm);
  display: inline-block;
  line-height: 1.6;
}

/* ================== TAB 5: OBJECTIONS & TAWHEED ================== */
.condition-banner {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.15), rgba(56, 189, 248, 0.1));
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.condition-badge {
  display: inline-block;
  background: var(--text-accent);
  color: #111;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 0.2rem 0.9rem;
  border-radius: 20px;
  margin-bottom: 0.6rem;
}

.condition-banner h3 {
  font-family: var(--font-arabic);
  font-size: 1.7rem;
  color: var(--text-arabic);
  margin-bottom: 0.6rem;
}

.condition-banner p {
  max-width: 850px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--text-main);
  line-height: 1.8;
}

.objection-card {
  display: flex;
  flex-direction: column;
}

.obj-tag {
  background: rgba(248, 113, 113, 0.15);
  color: var(--red-alert);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.2rem 0.7rem;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: 0.4rem;
}

.obj-header h3 {
  font-size: 1.3rem;
  color: var(--text-accent);
  margin-bottom: 0.8rem;
}

.objection-text {
  background: rgba(255, 255, 255, 0.03);
  border-right: 3px solid var(--red-alert);
  padding: 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 1.2rem;
}

.answer-box {
  background: rgba(52, 211, 153, 0.06);
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: var(--radius-sm);
  padding: 1.2rem;
}

.ans-badge {
  color: var(--green-success);
  font-weight: 800;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.answer-box p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-main);
}

.tawheed-box {
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.12), rgba(20, 30, 42, 0.9));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  align-items: center;
  gap: 1.8rem;
}

.tawheed-icon {
  font-size: 3rem;
}

.tawheed-content h3 {
  font-size: 1.5rem;
  color: var(--text-accent);
  margin-bottom: 0.5rem;
}

.arabic-p-small {
  font-family: var(--font-arabic);
  font-size: 1.3rem;
  color: #ff7675;
  margin-bottom: 0.5rem;
}

/* ================== TAB 6: QUIZ ================== */
.quiz-container {
  max-width: 900px;
  margin: 0 auto;
}

.score-display {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.4rem 1.2rem;
  border-radius: 20px;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--teal-accent);
}

.quiz-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.quiz-card.answered {
  border-color: rgba(255, 255, 255, 0.15);
}

.q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.8rem;
}

.q-num {
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--text-accent);
}

.quiz-card h4 {
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
  color: var(--text-arabic);
  line-height: 1.6;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.quiz-opt-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.98rem;
  text-align: right;
  cursor: pointer;
  transition: var(--transition);
}

.quiz-opt-btn:hover:not(:disabled) {
  background: rgba(212, 175, 55, 0.12);
  border-color: var(--border-focus);
}

.quiz-opt-btn.correct {
  background: rgba(52, 211, 153, 0.2) !important;
  border-color: var(--green-success) !important;
  color: #a7f3d0 !important;
}

.quiz-opt-btn.wrong {
  background: rgba(248, 113, 113, 0.2) !important;
  border-color: var(--red-alert) !important;
  color: #fca5a5 !important;
}

.q-feedback {
  margin-top: 1rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.7;
  display: none;
}
.q-feedback.show { display: block; }
.q-feedback.success { background: rgba(52, 211, 153, 0.1); border: 1px solid var(--green-success); color: #a7f3d0; }
.q-feedback.fail { background: rgba(248, 113, 113, 0.1); border: 1px solid var(--red-alert); color: #fca5a5; }

/* Footer */
.app-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-glass);
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Clickable Hero Stat Boxes */
.stat-box.clickable {
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.stat-box.clickable:hover {
  border-color: var(--border-focus);
  background: rgba(212, 175, 55, 0.15);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--gold-glow);
}
.stat-box.clickable:active {
  transform: translateY(-1px);
}
.stat-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--teal-accent);
  margin-top: 0.3rem;
  font-weight: 700;
  opacity: 0.85;
}

/* Modern Summary Cards & Real-World Examples */
.clickable-card {
  cursor: pointer;
  transition: var(--transition);
}
.clickable-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-5px);
  box-shadow: 0 12px 30px var(--gold-glow);
}
.modern-summary-card {
  display: flex;
  flex-direction: column;
}
.card-top-badge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}
.modern-term-badge {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  font-size: 0.82rem;
  color: var(--blue-accent);
  margin: 0.6rem 0;
  direction: ltr;
  text-align: right;
}
.modern-term-badge .label {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-right: 0.4rem;
}
.card-desc {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 0.8rem;
}
.real-world-box {
  background: rgba(255, 255, 255, 0.04);
  border-right: 3px solid var(--teal-accent);
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  margin-top: auto;
  font-size: 0.88rem;
  line-height: 1.75;
}
.rw-title {
  color: var(--teal-accent);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}
.card-footer-action {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
  color: var(--text-accent);
  font-size: 0.88rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.3rem;
}
.card-footer-action:hover {
  color: var(--teal-accent);
}

/* ================== TAB: MODERN BRIDGE STYLES ================== */
.bridge-search-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  right: 1.1rem;
  font-size: 1.2rem;
  color: var(--text-muted);
}

#conceptSearchInput {
  width: 100%;
  padding: 0.85rem 3.2rem 0.85rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

#conceptSearchInput:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 12px var(--gold-glow);
}

.filter-chips {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chip {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.chip:hover, .chip.active {
  background: var(--text-accent);
  color: #111;
  border-color: var(--text-accent);
}

.modern-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 1.5rem;
}

.modern-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.modern-card:hover {
  border-color: var(--teal-accent);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(45, 212, 191, 0.15);
}

.modern-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px dashed var(--border-color);
}

.badge-ar {
  font-family: var(--font-arabic);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-accent);
}

.badge-en {
  font-size: 0.82rem;
  background: rgba(56, 189, 248, 0.12);
  color: var(--blue-accent);
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  font-weight: 600;
  letter-spacing: 0.3px;
  direction: ltr;
}

.concept-math {
  font-family: 'Cambria Math', 'STIX Two Math', 'Segoe UI Symbol', 'Noto Sans Math', 'DejaVu Sans', 'Fira Code', 'Consolas', monospace;
  direction: ltr;
  text-align: left;
  unicode-bidi: isolate;
  background: rgba(0, 0, 0, 0.28);
  border-left: 3px solid var(--teal-accent);
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  font-size: 0.92rem;
  color: var(--teal-accent);
  margin-bottom: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: 0.3px;
}

.math-label {
  font-weight: 700;
  color: var(--text-accent);
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.5px;
}

.math-expr {
  font-family: 'Cambria Math', 'STIX Two Math', 'Segoe UI Symbol', 'Noto Sans Math', 'Consolas', monospace;
  font-weight: 600;
  font-size: 1.08rem;
  color: #f8fafc;
  background: rgba(45, 212, 191, 0.15);
  border: 1px solid rgba(45, 212, 191, 0.35);
  padding: 0.2rem 0.6rem;
  border-radius: 5px;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  direction: ltr;
  unicode-bidi: isolate;
  vertical-align: middle;
}

.math-op {
  font-weight: bold;
  color: var(--teal-accent);
  font-size: 1.15rem;
  line-height: 1;
}

.math-quant {
  font-size: 1.12rem;
  color: #38bdf8;
  font-weight: bold;
}

.math-var {
  font-style: italic;
  font-family: 'Times New Roman', 'Cambria Math', serif;
  color: #fde047;
  font-size: 1.1rem;
}

.math-neg {
  font-weight: bold;
  color: #f87171;
  font-size: 1.1rem;
}

.math-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: 'Outfit', sans-serif;
}

.modern-explanation {
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--text-main);
  margin-bottom: 0.8rem;
}

.modern-example {
  background: rgba(212, 175, 55, 0.07);
  border-right: 3px solid var(--text-accent);
  padding: 0.65rem 0.9rem;
  border-radius: 4px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* ================== INTERACTIVE DEMOS STYLING ================== */
.interactive-demos-section {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-top: 2.5rem;
}

.demo-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  box-shadow: var(--shadow-sm);
}

.demo-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-bottom: 1.5rem;
}

.demo-info {
  max-width: 700px;
}

.demo-info h4 {
  font-size: 1.25rem;
  color: var(--text-accent);
  margin-bottom: 0.4rem;
}

.demo-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.demo-controls {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.demo-feedback-box {
  background: rgba(255, 255, 255, 0.03);
  border-right: 3px solid var(--teal-accent);
  padding: 0.9rem 1.2rem;
  border-radius: var(--radius-sm);
  margin-top: 1.2rem;
  font-size: 0.95rem;
  line-height: 1.8;
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}

.fb-tag {
  color: var(--teal-accent);
  font-weight: 800;
  white-space: nowrap;
}

/* 1. Train Animation Stage */
.train-stage {
  background: linear-gradient(180deg, #091017 0%, #15222f 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 2.5rem 1.5rem 1.8rem 1.5rem;
  position: relative;
  overflow: hidden;
  min-height: 170px;
  display: flex;
  align-items: center;
}

.rail-track {
  position: absolute;
  bottom: 30px;
  left: 0;
  right: 0;
  height: 10px;
  background: repeating-linear-gradient(90deg, #443224 0, #443224 15px, #1a1a1a 15px, #1a1a1a 30px);
  border-top: 2px solid #888;
  border-bottom: 2px solid #888;
}

.train-consist {
  display: flex;
  align-items: flex-end;
  gap: 0.8rem;
  position: relative;
  z-index: 2;
  transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.train-consist.running {
  animation: trainChug 2s infinite linear alternate;
}

@keyframes trainChug {
  0% { transform: translateX(0); }
  100% { transform: translateX(-45px); }
}

.train-unit {
  background: rgba(22, 33, 46, 0.9);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  text-align: center;
  min-width: 140px;
  position: relative;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  user-select: none;
}

.train-unit::after {
  content: '⚙️ ⚙️';
  position: absolute;
  bottom: -18px;
  font-size: 0.75rem;
}

.train-unit.engine {
  border-color: var(--text-accent);
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.3), rgba(20, 30, 42, 0.95));
  box-shadow: 0 0 20px var(--gold-glow);
}

.steam-bubble {
  position: absolute;
  top: -24px;
  right: 15px;
  font-size: 1.2rem;
  animation: steamRise 1s infinite alternate;
}

@keyframes steamRise {
  from { transform: translateY(0) scale(0.9); opacity: 0.6; }
  to { transform: translateY(-8px) scale(1.2); opacity: 1; }
}

.unit-icon {
  font-size: 1.8rem;
  margin-bottom: 0.2rem;
}

.unit-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.unit-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.infinity-wagon {
  background: rgba(255, 255, 255, 0.03);
  border-style: dashed;
}
.infinity-sign {
  font-size: 1.4rem;
  color: var(--text-muted);
}

/* 2. Hilbert Hotel Stage */
.hotel-rooms-row {
  display: flex;
  gap: 0.8rem;
  overflow-x: auto;
  padding: 1.2rem 0.5rem;
  scrollbar-width: thin;
}

.hotel-room {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  min-width: 100px;
  padding: 1rem 0.6rem;
  text-align: center;
  transition: all 0.4s ease;
  position: relative;
}

.hotel-room.vacant {
  border-color: var(--green-success);
  background: rgba(52, 211, 153, 0.1);
}

.hotel-room.shifted {
  transform: translateY(-8px);
  border-color: var(--teal-accent);
}

.room-num {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.4rem;
}

.room-avatar {
  font-size: 1.8rem;
  display: block;
}

.room-status {
  font-size: 0.7rem;
  font-weight: 700;
  margin-top: 0.4rem;
  display: block;
}

/* 3. Domino Stage */
.domino-stage {
  background: #090e14;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 2.2rem 1.5rem;
  overflow-x: auto;
}

.domino-track {
  display: flex;
  gap: 1.8rem;
  align-items: flex-end;
  min-width: 600px;
  padding-bottom: 0.5rem;
}

.domino-tile {
  width: 28px;
  height: 90px;
  background: linear-gradient(135deg, #e5c05d, #a37918);
  border-radius: 4px;
  box-shadow: 2px 4px 10px rgba(0, 0, 0, 0.6);
  transform-origin: bottom right;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #111;
  font-weight: 800;
  font-size: 0.7rem;
  user-select: none;
}

.domino-tile.toppled {
  transform: rotate(-72deg);
  background: linear-gradient(135deg, #2dd4bf, #0f766e);
}

.domino-tile.current-day {
  height: 105px;
  background: linear-gradient(135deg, #38bdf8, #0369a1);
  color: #fff;
  border: 2px solid #fff;
}

/* Responsive Media Queries */
@media (max-width: 900px) {
  .parallel-block { grid-template-columns: 1fr; }
  .flow-split { grid-template-columns: 1fr; }
  .dilemma-grid { grid-template-columns: 1fr; }
  .main-title { font-size: 1.7rem; }
  .hero-card { padding: 1.5rem; }
  .hero-stats { width: 100%; justify-content: space-around; }
}

@media print {
  .app-header, .nav-tabs, .sim-controls, .theme-switcher, .view-controls {
    display: none !important;
  }
  .tab-pane {
    display: block !important;
    page-break-after: always;
  }
  body {
    background: #fff !important;
    color: #000 !important;
  }
}