/* =====================================================
   밸런스 모임 - Apple MacBook Style CSS
   ===================================================== */

/* =====================================================
   1. CSS 변수 (Color System)
   ===================================================== */
:root {
  /* 라이트 모드 색상 */
  --color-bg: #f5f5f7;
  --color-bg-secondary: #ffffff;
  --color-text: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-tertiary: #aeaeb2;
  
  /* 액센트 색상 */
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-success: #34c759;
  --color-warning: #ff9500;
  --color-danger: #ff3b30;
  
  /* 보더 및 그림자 */
  --color-border: rgba(0, 0, 0, 0.1);
  --color-border-light: rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.16);
  
  /* 타이포그래피 */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  --letter-spacing: -0.02em;
  
  /* 간격 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* 반경 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* 전환 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-slow: 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
  --animation-duration: 0.8s;
  
  /* 레이아웃 */
  --max-width: 680px;
  --header-height: 60px;
}

/* 다크 모드 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #000000;
    --color-bg-secondary: #1c1c1e;
    --color-text: #f5f5f7;
    --color-text-secondary: #98989d;
    --color-text-tertiary: #636366;
    
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.6);
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  letter-spacing: var(--letter-spacing);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* =====================================================
   3. Typography
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: var(--letter-spacing);
  line-height: 1.2;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* =====================================================
   4. Layout
   ===================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.page {
  min-height: 100vh;
  padding-top: var(--header-height);
}

.page-content {
  padding: var(--spacing-xl) 0;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }

/* =====================================================
   5. Buttons
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  user-select: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
}

.btn-danger {
  background-color: var(--color-danger);
  color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(1.1);
  color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-accent);
}

.btn-ghost:hover:not(:disabled) {
  background-color: rgba(0, 113, 227, 0.1);
  color: var(--color-accent);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-block {
  width: 100%;
}

/* =====================================================
   6. Cards
   ===================================================== */
.card {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}

.card-hover {
  transition: all var(--transition-base);
}

.card-hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* =====================================================
   7. Forms
   ===================================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-error {
  font-size: var(--font-size-sm);
  color: var(--color-danger);
  margin-top: var(--spacing-xs);
}

/* =====================================================
   8. Badges
   ===================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge-primary {
  background-color: rgba(0, 113, 227, 0.1);
  color: var(--color-accent);
}

.badge-success {
  background-color: rgba(52, 199, 89, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(255, 149, 0, 0.1);
  color: var(--color-warning);
}

.badge-danger {
  background-color: rgba(255, 59, 48, 0.1);
  color: var(--color-danger);
}

.badge-secondary {
  background-color: var(--color-bg);
  color: var(--color-text-secondary);
}

/* =====================================================
   9. Progress Bar
   ===================================================== */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-bar-success .progress-bar-fill {
  background-color: var(--color-success);
}

.progress-bar-warning .progress-bar-fill {
  background-color: var(--color-warning);
}

/* =====================================================
   10. Header
   ===================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: 100;
}

@media (prefers-color-scheme: dark) {
  .header {
    background-color: rgba(0, 0, 0, 0.8);
  }
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.header-logo {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-nav-link {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.header-nav-link:hover,
.header-nav-link.active {
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  padding: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--color-text);
}

/* Mobile header actions (theme toggle + hamburger) */
.header-mobile-actions {
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Desktop: hide mobile theme toggle, show desktop theme toggle */
.theme-toggle-mobile {
  display: none;
}

.theme-toggle-desktop {
  display: flex;
}

/* 모바일 메뉴 오버레이 */
.menu-overlay {
  position: fixed;
  inset: 0;
  top: var(--header-height);
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .header-mobile-actions {
    display: flex;
  }
  
  /* Hide desktop theme toggle, show mobile theme toggle */
  .header-nav .theme-toggle-desktop {
    display: none !important;
  }
  
  .theme-toggle-mobile {
    display: flex;
  }
  
  .header-nav {
    display: none;
  }
  
  .header-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    box-shadow: var(--shadow-lg);
  }
}

/* =====================================================
   11. Modal
   ===================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  max-width: 480px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-base);
}

.modal-overlay.open .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.modal-close {
  padding: var(--spacing-sm);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-bg);
  color: var(--color-text);
}

.modal-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  margin-bottom: var(--spacing-lg);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  flex-shrink: 0;
}

/* =====================================================
   12. Toast
   ===================================================== */
.toast-container {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-danger);
}

.toast-warning {
  border-left: 4px solid var(--color-warning);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* =====================================================
   13. Loading
   ===================================================== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

/* =====================================================
   14. Choice Buttons (밸런스 게임용)
   ===================================================== */
.choice-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .choice-container {
    flex-direction: row;
  }
}

.choice-btn {
  flex: 1;
  padding: var(--spacing-2xl);
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  background-color: var(--color-bg-secondary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.choice-btn:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.choice-btn:active {
  transform: scale(0.98);
}

.choice-btn.selected {
  border-color: var(--color-accent);
  background-color: rgba(0, 113, 227, 0.1);
}

.choice-btn.option-a:hover,
.choice-btn.option-a.selected {
  border-color: var(--color-accent);
}

.choice-btn.option-b:hover,
.choice-btn.option-b.selected {
  border-color: var(--color-success);
}

.choice-btn.option-b.selected {
  background-color: rgba(52, 199, 89, 0.1);
}

/* =====================================================
   15. Stats Display
   ===================================================== */
.stats-bar {
  display: flex;
  height: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-bg);
}

.stats-bar-a,
.stats-bar-b {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #ffffff;
  transition: width var(--transition-slow);
}

.stats-bar-a {
  background-color: var(--color-accent);
}

.stats-bar-b {
  background-color: var(--color-success);
}

/* =====================================================
   16. Tag Chips
   ===================================================== */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tag:hover {
  color: var(--color-accent);
  background-color: rgba(0, 113, 227, 0.1);
}

.tag.active {
  color: #ffffff;
  background-color: var(--color-accent);
}

/* =====================================================
   17. Empty State
   ===================================================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl);
}

.empty-state-icon {
  font-size: 64px;
  margin-bottom: var(--spacing-lg);
}

.empty-state-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.empty-state-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* =====================================================
   18. Utilities
   ===================================================== */
.hidden { display: none !important; }
.invisible { visibility: hidden; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* =====================================================
   19. Animations
   ===================================================== */
.fade-in {
  animation: fadeIn var(--animation-duration) cubic-bezier(0.25, 0.1, 0.25, 1);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.slide-up {
  animation: slideUp var(--animation-duration) cubic-bezier(0.25, 0.1, 0.25, 1);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scale-in {
  animation: scaleIn var(--animation-duration) cubic-bezier(0.25, 0.1, 0.25, 1);
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* =====================================================
   20. 반응형 디자인
   ===================================================== */

/* 모바일 (< 768px) */
@media (max-width: 767px) {
  :root {
    --font-size-base: 15px;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .text-3xl {
    font-size: 1.75rem;
  }
  
  .text-4xl {
    font-size: 2rem;
  }
  
  /* 선택지 세로 배치 */
  .choice-container {
    flex-direction: column;
  }
  
  .choice-btn {
    min-height: 80px;
  }
  
  /* 버튼 크기 조정 */
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
  }
  
  /* 모달 전체 화면 */
  .modal {
    max-width: 100%;
    border-radius: var(--radius-xl);
    margin: var(--spacing-md);
  }
  
  /* 카드 패딩 축소 */
  .card {
    padding: var(--spacing-md);
  }
  
  /* 통계 바 높이 축소 */
  .stats-bar {
    height: 36px;
    font-size: var(--font-size-sm);
  }
}

/* 태블릿 (768px ~ 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .container {
    max-width: 720px;
  }
  
  .choice-container {
    flex-direction: row;
  }
}

/* PC (≥ 1024px) */
@media (min-width: 1024px) {
  .container {
    max-width: var(--max-width);
  }
  
  /* 호버 효과 강화 */
  .card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }
  
  .btn:hover {
    transform: translateY(-1px);
  }
}

/* 다크모드 자동 적용 */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1c1c1e;
    --color-bg-secondary: #2c2c2e;
    --color-text: #f5f5f7;
    --color-text-secondary: #8e8e93;
    --color-text-tertiary: #636366;
    --color-border: #3a3a3c;
    --color-border-light: #2c2c2e;
  }
  
  .choice-btn {
    background-color: var(--color-bg-secondary);
  }
  
  .choice-btn.selected {
    background-color: rgba(0, 113, 227, 0.2);
  }
  
  .choice-btn.option-b.selected {
    background-color: rgba(52, 199, 89, 0.2);
  }
}

/* 애니메이션 설정 - 감소된 모션 선호 사용자 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =====================================================
   21. 명시적 테마 클래스
   ===================================================== */

/* 라이트 테마 (강제) */
:root.theme-light {
  --color-bg: #f5f5f7;
  --color-bg-secondary: #ffffff;
  --color-text: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-tertiary: #aeaeb2;
  --color-border: rgba(0, 0, 0, 0.1);
  --color-border-light: rgba(0, 0, 0, 0.05);
}

:root.theme-light .header {
  background-color: rgba(255, 255, 255, 0.8);
}

:root.theme-light .choice-btn {
  background-color: var(--color-bg-secondary);
}

:root.theme-light .choice-btn.selected {
  background-color: rgba(0, 113, 227, 0.1);
}

:root.theme-light .choice-btn.option-b.selected {
  background-color: rgba(52, 199, 89, 0.1);
}

/* 다크 테마 (강제) */
:root.theme-dark {
  --color-bg: #1c1c1e;
  --color-bg-secondary: #2c2c2e;
  --color-text: #f5f5f7;
  --color-text-secondary: #8e8e93;
  --color-text-tertiary: #636366;
  --color-border: #3a3a3c;
  --color-border-light: #2c2c2e;
}

:root.theme-dark .header {
  background-color: rgba(0, 0, 0, 0.8);
}

:root.theme-dark .choice-btn {
  background-color: var(--color-bg-secondary);
}

:root.theme-dark .choice-btn.selected {
  background-color: rgba(0, 113, 227, 0.2);
}

:root.theme-dark .choice-btn.option-b.selected {
  background-color: rgba(52, 199, 89, 0.2);
}

/* 테마 토글 버튼 */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-bg);
  border-color: var(--color-accent);
}