/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  padding: 2rem 1rem;
}

h1, h2, h3, h4, .quote-text {
  font-family: 'Playfair Display', Georgia, serif;
}

/* Theme variables */
:root {
  /* Stoic Calm (Default) */
  --bg-main: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(51, 65, 85, 0.8);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-rgb: 56, 189, 248;
  --accent-secondary: #0ea5e9;
  --border: rgba(255, 255, 255, 0.08);
  --glow: rgba(56, 189, 248, 0.15);
  --correct: #10b981;
  --wrong: #ef4444;
}

[data-theme="nietzsche"] {
  --bg-main: #09090b;
  --bg-card: rgba(24, 24, 27, 0.75);
  --bg-card-hover: rgba(39, 39, 42, 0.85);
  --text-main: #fafafa;
  --text-muted: #a1a1aa;
  --accent: #ef4444;
  --accent-rgb: 239, 68, 68;
  --accent-secondary: #b91c1c;
  --border: rgba(239, 68, 68, 0.15);
  --glow: rgba(239, 68, 68, 0.2);
}

[data-theme="rationalist"] {
  --bg-main: #020617;
  --bg-card: rgba(15, 23, 42, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --text-main: #f8fafc;
  --text-muted: #64748b;
  --accent: #22d3ee;
  --accent-rgb: 34, 211, 238;
  --accent-secondary: #06b6d4;
  --border: rgba(34, 211, 238, 0.15);
  --glow: rgba(34, 211, 238, 0.2);
}

[data-theme="eastern"] {
  --bg-main: #0c120c;
  --bg-card: rgba(22, 34, 22, 0.7);
  --bg-card-hover: rgba(36, 54, 36, 0.8);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --accent: #fbbf24;
  --accent-rgb: 251, 191, 36;
  --accent-secondary: #d97706;
  --border: rgba(251, 191, 36, 0.15);
  --glow: rgba(251, 191, 36, 0.15);
}

/* Glassmorphism & Layout */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  padding: 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

header .logo h1 {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, var(--text-main), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

header .logo h1:hover {
  opacity: 0.85;
}

header .logo p {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.2rem;
}

.total-philosophers-badge {
  display: inline-block;
  font-size: 0.72rem;
  background: rgba(var(--accent-rgb), 0.12);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  color: var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  margin-left: 0.5rem;
  font-weight: 600;
  white-space: nowrap;
}

.theme-selector {
  display: flex;
  gap: 0.5rem;
}

.theme-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 0.6rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.theme-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent);
}

.theme-btn.active {
  background: rgba(var(--accent-rgb), 0.15);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--glow);
}

/* Main Dashboard */
.dashboard {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

@media (max-width: 968px) {
  .dashboard {
    grid-template-columns: 1fr;
  }
}

/* Glass Card Base */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 2rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
}

.glass-card:hover {
  border-color: rgba(var(--accent-rgb), 0.3);
  box-shadow: 0 10px 40px 0 rgba(0, 0, 0, 0.3), 0 0 20px var(--glow);
}

/* Spotlight Philosopher Card */
.spotlight-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.philosopher-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.ph-portrait-container {
  width: 85px;
  height: 85px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  background: var(--bg-card);
}

.ph-portrait-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.ph-portrait-container:hover img {
  transform: scale(1.1);
}

.ph-header-meta {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

@media (max-width: 480px) {
  .philosopher-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}

.badge-daily {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.philosopher-name-wrap {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
}

.philosopher-name {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

.philosopher-eng-name {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
}

.philosopher-period {
  font-size: 0.85rem;
  color: var(--accent);
  background: rgba(var(--accent-rgb), 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  display: inline-block;
  margin-top: 0.5rem;
}

.philosopher-body {
  flex-grow: 1;
}

.philosopher-tagline {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--accent);
  padding-left: 0.8rem;
}

.quote-container {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.quote-text {
  font-size: 1.3rem;
  font-style: italic;
  line-height: 1.5;
  margin-bottom: 0.5rem;
}

.quote-english {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.bio-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Right Column Panels */
.right-column {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.panel-title {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.panel-title::after {
  content: '';
  flex-grow: 1;
  height: 1px;
}

/* Concepts Explorer */
.concept-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.concept-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.15);
  overflow: hidden;
  cursor: pointer;
}

.concept-header {
  padding: 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.concept-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.concept-toggle-icon {
  color: var(--accent);
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.concept-item.open .concept-toggle-icon {
  transform: rotate(180deg);
}

.concept-body {
  padding: 0 1.2rem 1.2rem;
  display: none;
  animation: slideDown 0.3s forwards;
}

.concept-item.open .concept-body {
  display: block;
}

.concept-description {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.concept-example {
  background: rgba(var(--accent-rgb), 0.05);
  border-left: 2px solid var(--accent);
  padding: 0.8rem;
  border-radius: 0 8px 8px 0;
}

.concept-example-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.2rem;
  text-transform: uppercase;
}

.concept-example-text {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Daily Practice & Journaling */
.journal-prompt {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 1.2rem;
  line-height: 1.5;
  font-weight: 500;
}

.textarea-wrap {
  position: relative;
  margin-bottom: 1rem;
}

.journal-textarea {
  width: 100%;
  height: 120px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  resize: none;
  outline: none;
}

.journal-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--glow);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  color: #000;
  font-weight: 700;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  cursor: pointer;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px var(--glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.past-reflections {
  margin-top: 1.5rem;
}

.past-reflection-title {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.past-reflection-list {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding-right: 0.5rem;
}

.past-reflection-list::-webkit-scrollbar {
  width: 4px;
}

.past-reflection-list::-webkit-scrollbar-thumb {
  background-color: var(--border);
  border-radius: 4px;
}

.past-reflection-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem;
}

.past-reflection-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.past-reflection-philosopher {
  font-weight: 700;
}

.past-reflection-content {
  font-size: 0.85rem;
  color: var(--text-main);
  white-space: pre-wrap;
}

/* Daily Quiz Module */
.quiz-widget {
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.quiz-progress-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.quiz-progress-dot {
  flex-grow: 1;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.quiz-progress-dot.active {
  background: var(--accent);
  box-shadow: 0 0 8px var(--glow);
}

.quiz-progress-dot.correct {
  background: var(--correct);
}

.quiz-progress-dot.wrong {
  background: var(--wrong);
}

.quiz-question {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
  color: var(--text-main);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.quiz-option-btn {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1.2rem;
  text-align: left;
  color: var(--text-main);
  cursor: pointer;
  font-size: 0.95rem;
  outline: none;
}

.quiz-option-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent);
}

.quiz-option-btn.selected-correct {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--correct);
  color: #a7f3d0;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

.quiz-option-btn.selected-wrong {
  background: rgba(239, 68, 68, 0.15);
  border-color: var(--wrong);
  color: #fca5a5;
  box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}

.quiz-feedback {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 12px;
  padding: 1rem;
  margin-top: 1rem;
  border-left: 4px solid var(--accent);
}

.quiz-feedback-status {
  font-weight: 700;
  margin-bottom: 0.3rem;
  font-size: 0.9rem;
}

.quiz-feedback-status.correct {
  color: var(--correct);
}

.quiz-feedback-status.wrong {
  color: var(--wrong);
}

.quiz-feedback-explanation {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.quiz-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
}

.quiz-result-screen {
  text-align: center;
  padding: 1.5rem;
}

.quiz-result-score {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.quiz-result-text {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

/* Forest of Wisdom (Archive Grid) */
.archive-section {
  margin-top: 4rem;
}

.archive-title {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.archive-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

.archive-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  height: 220px;
  position: relative;
  overflow: hidden;
}

.archive-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
}

.archive-card:hover {
  transform: translateY(-5px);
  border-color: rgba(var(--accent-rgb), 0.4);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

.archive-card.active-spotlight {
  border-color: var(--accent);
  box-shadow: 0 0 15px var(--glow);
}

.archive-card.active-spotlight::before {
  background: var(--accent);
}

.archive-card-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  color: var(--text-main);
}

.archive-card-eng {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.archive-card-period {
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.8rem;
}

.archive-card-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  flex-grow: 1;
}

/* Animations */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

/* Custom Scrollbar for Browser */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-card);
  border-radius: 5px;
  border: 2px solid var(--bg-main);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Map Navigation Stacked Tables Styling */
.map-navigation-card {
  margin-top: 1rem;
}

.map-nav-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
}

.map-nav-title-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.map-nav-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  background: linear-gradient(to right, var(--text-main), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.search-box-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  pointer-events: none;
}

#philosopher-search-input {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.4rem 1rem 0.4rem 1.8rem;
  color: var(--text-main);
  font-size: 0.85rem;
  width: 220px;
  outline: none;
  transition: all 0.3s ease;
}

#philosopher-search-input:focus {
  border-color: var(--accent);
  background: rgba(0, 0, 0, 0.4);
  box-shadow: 0 0 10px var(--glow);
  width: 280px;
}

.map-nav-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.map-tables-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.region-table-section {
  display: flex;
  flex-direction: column;
}

.region-table-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.map-table-wrapper {
  overflow-x: auto;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.15);
}

.map-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.map-table th, .map-table td {
  padding: 1.2rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.map-table tr:last-child td {
  border-bottom: none;
}

.map-table th {
  background: rgba(255, 255, 255, 0.03);
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

.col-era {
  width: 130px;
  min-width: 110px;
}

.col-philosophers {
  /* Takes the remaining space */
}

.cell-era-title {
  color: var(--accent);
  font-size: 0.95rem;
  text-align: center;
  border-right: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.01);
  vertical-align: middle !important;
}

.era-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
}

.era-years {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
  opacity: 0.75;
  display: inline-block;
  margin-top: 0.2rem;
}

.philosopher-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.philosopher-tag {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: 12px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.philosopher-tag:hover {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  transform: translateY(-1px);
}

.philosopher-tag.active {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.2);
  box-shadow: 0 0 10px var(--glow);
  font-weight: 700;
}

@media (max-width: 768px) {
  .map-table, .map-table tbody, .map-table tr, .map-table td, .map-table th {
    display: block;
    width: 100%;
  }
  
  .map-table thead {
    display: none;
  }
  
  .map-table tr {
    border-bottom: 2px solid var(--border);
    padding: 1rem 0;
  }
  
  .map-table tr:last-child {
    border-bottom: none;
  }
  
  .map-table td {
    border-bottom: none;
    padding: 0.6rem 1.2rem;
  }
  
  .cell-era-title {
    border-right: none;
    text-align: left;
    background: rgba(var(--accent-rgb), 0.05);
    padding: 0.5rem 1.2rem;
    margin-bottom: 0.5rem;
  }
  
  .cell-era-title br {
    display: none;
  }
  
  .cell-era-title .era-subtitle {
    margin-left: 0.5rem;
  }
}

/* Representative Works styling */
.ph-books-section {
  margin-top: 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.books-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.books-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.book-item {
  width: 100%;
}

.book-link {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.4rem;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.88rem;
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--border);
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  width: 100%;
  transition: all 0.25s ease;
}

.book-link:hover {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  color: var(--accent);
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.05);
}

.book-name {
  font-weight: 600;
}

.book-year {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-left: auto;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.book-link:hover .book-year {
  color: var(--accent);
  border-color: rgba(var(--accent-rgb), 0.3);
}

.book-link-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 0.5rem;
}

.book-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin: 0;
  text-align: left;
  transition: color 0.2s ease;
}

.book-link:hover .book-desc {
  color: var(--text-main);
}

/* SPA View Transitions & Navigation */
.view-section {
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 1;
  transform: translateY(0);
}

.view-section.hidden-view {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

.back-nav-container {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: flex-start;
}

.btn-back-dashboard {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 0.6rem 1.2rem;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-back-dashboard:hover {
  background: rgba(var(--accent-rgb), 0.1);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 15px var(--glow);
  transform: translateY(-2px);
}

.btn-back-dashboard:active {
  transform: translateY(0);
}

/* Philosophical Movements UI Styling */
.movement-tag {
  background: rgba(var(--accent-rgb), 0.05);
  border: 1px solid rgba(var(--accent-rgb), 0.2);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: 12px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.movement-tag:hover {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.15);
  box-shadow: 0 0 8px var(--glow);
  transform: translateY(-1px);
}

.movement-concept-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  transition: all 0.2s ease;
}

.movement-concept-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(var(--accent-rgb), 0.3);
}

.concept-card-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.concept-card-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.concept-card-sum {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.6rem;
}

.concept-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

.philosopher-link-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.philosopher-link-card:hover {
  border-color: var(--accent);
  background: rgba(var(--accent-rgb), 0.08);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3), 0 0 10px var(--glow);
}

.philosopher-link-card img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid var(--border);
  transition: border-color 0.3s ease;
}

.philosopher-link-card:hover img {
  border-color: var(--accent);
}

.philosopher-link-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.philosopher-link-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-main);
}

.philosopher-link-era {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Movements Table Responsive Grid Layout (No empty space) */
.movements-table {
  display: block;
}

.movements-table thead {
  display: none !important;
}

.movements-table tbody {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.2rem;
  padding: 1.2rem;
  width: 100%;
  box-sizing: border-box;
}

.movements-table tr {
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border) !important;
  border-radius: 16px;
  padding: 1.2rem !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  gap: 0.8rem;
  box-sizing: border-box;
}

.movements-table tr:hover {
  border-color: rgba(var(--accent-rgb), 0.3) !important;
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3), 0 0 10px var(--glow);
  transform: translateY(-2px);
}

.movements-table td {
  padding: 0 !important;
  border: none !important;
  background: transparent !important;
  width: 100% !important;
  text-align: left !important;
}

.movements-table .cell-era-title {
  color: var(--accent) !important;
  font-size: 0.98rem;
  font-weight: 700;
  border-right: none !important;
}

.movements-table .era-subtitle {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
}

.movements-table br {
  display: none !important;
}

/* Mobile and Tablet Readability Optimizations */
@media (max-width: 768px) {
  body {
    padding: 1rem 0.5rem;
  }

  header {
    flex-direction: column;
    align-items: stretch;
    gap: 1.2rem;
    padding: 1.2rem;
    margin-bottom: 1.5rem;
  }

  header .logo {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  header .logo h1 {
    font-size: 1.7rem;
    justify-content: center;
    white-space: nowrap;
  }

  header .logo p {
    font-size: 0.85rem;
    justify-content: center;
    text-align: center;
  }

  .theme-selector {
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    width: 100%;
  }

  .theme-btn {
    padding: 0.5rem 0.8rem;
    font-size: 0.78rem;
    flex-grow: 1;
    justify-content: center;
  }

  .glass-card {
    padding: 1.5rem;
    border-radius: 20px;
  }

  .philosopher-name {
    font-size: 1.8rem;
  }

  .philosopher-tagline {
    font-size: 1rem;
  }

  .quote-text {
    font-size: 1.15rem;
  }

  .bio-text {
    font-size: 0.9rem;
  }

  /* Mobile Readability Improvements */
  .bio-text,
  .quote-text,
  .concept-desc,
  .concept-card-desc,
  .concept-example-text,
  .past-reflection-content,
  .quiz-feedback-explanation,
  .philosopher-tagline {
    word-break: keep-all;
    text-align: justify;
    line-height: 1.65;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.8rem 0.4rem;
  }

  header {
    padding: 1rem;
    border-radius: 12px;
  }

  header .logo h1 {
    font-size: 1.45rem;
  }

  header .logo p {
    font-size: 0.78rem;
  }

  .theme-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.35rem;
  }

  .theme-btn {
    padding: 0.45rem;
    font-size: 0.75rem;
  }

  #pwa-install-btn {
    grid-column: span 2;
  }

  .philosopher-header {
    flex-direction: row !important;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
  }

  .ph-portrait-container {
    width: 70px;
    height: 70px;
    border-radius: 12px;
  }

  .philosopher-name {
    font-size: 1.5rem;
  }

  .philosopher-eng-name {
    font-size: 0.9rem;
  }

  .philosopher-period {
    font-size: 0.75rem;
    padding: 0.15rem 0.45rem;
  }

  .philosopher-tagline {
    font-size: 0.95rem;
    margin-bottom: 1rem;
  }

  .quote-container {
    padding: 1rem;
    margin-bottom: 1rem;
  }

  .quote-text {
    font-size: 1.05rem;
  }

  .quote-english {
    font-size: 0.82rem;
  }

  .bio-text {
    font-size: 0.85rem;
  }

  .philosopher-tag {
    padding: 0.3rem 0.6rem;
    font-size: 0.78rem;
  }

  .cell-era-title {
    font-size: 0.88rem;
  }

  .search-box-wrap {
    width: 100%;
  }

  #philosopher-search-input {
    width: 100%;
  }

  #philosopher-search-input:focus {
    width: 100%;
  }

  .movements-table tbody {
    grid-template-columns: 1fr;
    padding: 0.5rem;
  }
}

/* Backbone Philosophers Tag Emphasis (Size Kept Identical) */
.philosopher-tag.backbone {
  border-color: rgba(var(--accent-rgb), 0.55) !important;
  background: rgba(var(--accent-rgb), 0.08) !important;
  box-shadow: 0 0 6px rgba(var(--accent-rgb), 0.12);
}

.philosopher-tag.backbone:hover {
  border-color: var(--accent) !important;
  background: rgba(var(--accent-rgb), 0.18) !important;
  box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.25);
}

.philosopher-tag.backbone.active {
  border-color: var(--accent) !important;
  background: rgba(var(--accent-rgb), 0.25) !important;
  box-shadow: 0 0 15px var(--glow) !important;
}

/* PWA Modal Styles */
.pwa-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.pwa-modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 90%;
  max-width: 420px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 15px var(--glow);
  color: var(--text-main);
}

.pwa-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.pwa-modal-header h4 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--accent);
}

.pwa-modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.pwa-modal-close-btn:hover {
  color: var(--text-main);
}

.pwa-modal-body {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-main);
}

.pwa-modal-body p {
  margin: 0 0 1rem 0;
  color: var(--text-muted);
}

.pwa-guide-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  margin-bottom: 0.75rem;
}

.pwa-guide-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.pwa-guide-item p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-main);
}

.pwa-modal-footer {
  margin-top: 1.25rem;
}