:root {
  /* Light Theme (Default) */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --success-color: #10b981;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  
  /* Options Colors (Scale) */
  --opt-strongly-agree: #059669;
  --opt-agree: #34d399;
  --opt-neutral: #94a3b8;
  --opt-disagree: #f87171;
  --opt-strongly-disagree: #dc2626;

  /* Fonts */
  --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  /* Sizing & Spacing */
  --max-width: 800px;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-sm: 4px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.3);
  --shadow-glow: 0 0 15px rgba(37, 99, 235, 0.4);

  /* Hover background */
  --hover-bg: #f1f5f9;
}

[data-theme="dark"] {
  --primary-color: #60a5fa;
  --primary-hover: #93c5fd;
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #334155;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -1px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5), 0 4px 6px -2px rgba(0,0,0,0.3);
  --shadow-focus: 0 0 0 3px rgba(96, 165, 250, 0.4);
  --shadow-glow: 0 0 20px rgba(96, 165, 250, 0.3);

  --hover-bg: #334155;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.app-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

/* Typography */
h1, h2, h3, h4 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

h1 { font-size: 2.25rem; margin-bottom: 0; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
p { margin-top: 0; margin-bottom: var(--spacing-sm); }

.subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
  margin-top: var(--spacing-xs);
}

.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }

/* Material Icons */
.material-symbols-rounded {
  vertical-align: middle;
  font-size: 24px;
}
.icon-large {
  font-size: 48px;
  margin-bottom: var(--spacing-sm);
  display: inline-block;
}

/* Layout Elements */
header {
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 100%;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
  position: absolute;
  right: 0;
}

.btn-icon:hover {
  background-color: var(--hover-bg);
}

footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: auto;
}

main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Views & Transitions */
.view {
  display: none;
  animation: fadeIn 0.4s ease-out;
}
.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  margin-bottom: var(--spacing-md);
  transition: box-shadow 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-content {
  padding: var(--spacing-xl);
}

/* Hero Section (Landing) */
.hero-section {
  padding: var(--spacing-xl) var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

.hero-icon-wrapper {
  background: var(--primary-color);
  color: white;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  margin-bottom: var(--spacing-xs);
}

.hero-icon {
  font-size: 40px;
}

.hero-title {
  font-size: 2.2rem;
  margin-bottom: 0;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  margin: var(--spacing-md) 0;
}

.badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  color: var(--text-main);
}

.badge .material-symbols-rounded {
  color: var(--primary-color);
  font-size: 20px;
}

.party-icons-decoration {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin: var(--spacing-sm) 0;
}

.party-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
  transition: transform 0.2s;
}

.party-dot:hover {
  transform: scale(1.3);
}

.party-dot.dp { background-color: #004ea1; }  /* 더불어민주당 */
.party-dot.ppp { background-color: #e61e2b; } /* 국민의힘 */
.party-dot.rkp { background-color: #003366; } /* 조국혁신당 */
.party-dot.nrp { background-color: #ff7d00; } /* 개혁신당 */
.party-dot.jp { background-color: #d6001c; }  /* 진보당 */

.mobile-break {
  display: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff; /* Explicit white to avoid text-main override in dark mode */
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-glow {
  box-shadow: var(--shadow-glow);
}

.btn-glow:hover {
  box-shadow: 0 0 25px rgba(37, 99, 235, 0.6);
}

[data-theme="dark"] .btn-glow:hover {
  box-shadow: 0 0 30px rgba(96, 165, 250, 0.5);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover:not(:disabled) {
  background-color: rgba(37, 99, 235, 0.1);
}

[data-theme="dark"] .btn-outline:hover:not(:disabled) {
    background-color: rgba(96, 165, 250, 0.1);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  border-radius: 50px; /* More rounded modern look */
}

.actions-container {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-lg);
}
.actions-container.center {
    justify-content: center;
}
.actions-container.action-column {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}
.actions-container.action-column .btn {
    width: 100%;
    max-width: 300px;
}

/* Progress Bar */
.progress-container {
  margin-bottom: var(--spacing-lg);
}

.progress-bar {
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--primary-color);
  width: 0%;
  transition: width 0.4s ease-out;
}

.progress-text {
  text-align: right;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* Quiz Options Container */
.question-text {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xl);
  text-align: center;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.options-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.option-btn {
  display: block;
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--card-bg);
  text-align: left;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-main);
  position: relative;
  overflow: hidden;
}

.option-btn:hover {
  background-color: var(--hover-bg);
  border-color: var(--text-muted);
}

.option-btn.selected {
  border-color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.05);
  font-weight: 600;
  box-shadow: 0 0 0 1px var(--primary-color);
}

[data-theme="dark"] .option-btn.selected {
    background-color: rgba(96, 165, 250, 0.1);
}

/* Loading Spinner */
.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--spacing-md);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Results Section */
.results-header {
  margin-bottom: var(--spacing-xl);
}

.type-badge {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 2px;
  margin: var(--spacing-md) 0 var(--spacing-xs);
  box-shadow: var(--shadow-sm);
}

.type-name {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.summary-text {
  font-size: 1.125rem;
  color: var(--text-muted);
  font-style: italic;
}

.type-details {
  background-color: var(--hover-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.detail-section h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--spacing-xs);
  color: var(--text-main);
  font-size: 1.1rem;
}

.detail-section h4 .material-symbols-rounded {
  color: var(--primary-color);
}

.detail-section p {
  color: var(--text-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.highlight-text {
  font-weight: 600;
  color: var(--text-main) !important;
  font-size: 1.1rem;
}

.detail-row {
  display: flex;
  gap: var(--spacing-md);
}

.detail-row .detail-section {
  flex: 1;
  background-color: var(--card-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.match-good h4 .material-symbols-rounded { color: #e11d48; }
.match-bad h4 .material-symbols-rounded { color: #94a3b8; }

.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 0.9rem;
  font-weight: 600;
}

.chart-title {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.chart-container {
  position: relative;
  height: 350px;
  width: 100%;
  margin: 0 0 var(--spacing-xl) 0;
}

.dimension-breakdown {
  margin-top: var(--spacing-xl);
}

.dimension-item {
  margin-bottom: var(--spacing-md);
}

.dim-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.dim-bar-bg {
  height: 12px;
  background-color: var(--border-color);
  border-radius: var(--radius-sm);
  position: relative;
}

.dim-bar-fill {
  height: 100%;
  border-radius: var(--radius-sm);
  position: absolute;
  top: 0;
  left: 0;
  transition: width 1s ease-out;
}

.dim-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Media Queries (Responsive adjustments) */
@media (max-width: 600px) {
  .app-container {
    padding: var(--spacing-xs);
  }
  
  .card-content {
    padding: var(--spacing-md);
  }

  h1 { font-size: 1.875rem; }
  .header-content { justify-content: center; }
  .btn-icon { position: absolute; right: var(--spacing-xs); }
  
  .hero-title { font-size: 1.75rem; }
  .hero-section { padding: var(--spacing-md) 0; }
  .feature-badges { flex-direction: column; gap: var(--spacing-xs); width: 100%; }
  .badge { justify-content: center; }
  .mobile-break { display: block; }
  
  .question-text { font-size: 1.25rem; min-height: 60px; }
  .btn-large { width: 100%; }
  
  .actions-container {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  .actions-container .btn {
    width: 100%;
  }
  #prev-btn { order: 2; }
  #next-btn { order: 1; }

  .detail-row {
    flex-direction: column;
  }
}