/* ================================
   1. CSS 변수 정의
   ================================ */
:root {
  /* 색상 팔레트 */
  --primary: #C9884D;
  --primary-dark: #A0632E;
  --primary-light: #E8D4C4;
  --secondary: #2C2C2C;
  --secondary-light: #4A4A4A;
  --accent: #D4A574;
  --bg: #FEFDFB;
  --bg-light: #F5F3F0;
  --text: #2C2C2C;
  --text-light: #6B6B6B;
  --text-lighter: #999999;
  --border: #E8E3DC;
  --border-dark: #D4CCC3;
  --white: #FFFFFF;
  --success: #6BA587;
  --warning: #D4A574;
  --error: #C66B6B;
  
  /* 그림자 */
  --shadow: 0 2px 8px rgba(44, 44, 44, 0.08);
  --shadow-md: 0 4px 16px rgba(44, 44, 44, 0.12);
  --shadow-lg: 0 8px 24px rgba(44, 44, 44, 0.15);
  --shadow-inner: inset 0 2px 4px rgba(44, 44, 44, 0.05);
  
  /* 스페이싱 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* 보더 */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  
  /* 트랜지션 */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.5s ease;
  
  /* 타이포그래피 */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-serif: 'Georgia', 'Garamond', serif;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
}

/* ================================
   2. 기본 스타일 리셋
   ================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg);
  color: var(--text);
  line-height: var(--line-height-normal);
  letter-spacing: 0.3px;
}

/* ================================
   3. 타이포그래피 시스템
   ================================ */
/* 제목 */
h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: -0.5px;
  margin-bottom: var(--spacing-lg);
  color: var(--secondary);
}

h2 {
  font-size: 36px;
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: -0.3px;
  margin-bottom: var(--spacing-lg);
  color: var(--secondary);
}

h3 {
  font-size: 28px;
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  color: var(--secondary);
}

h4 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--secondary);
}

h5 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--secondary);
}

h6 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--secondary);
}

/* 본문 */
p {
  font-size: 16px;
  line-height: var(--line-height-normal);
  margin-bottom: var(--spacing-md);
  color: var(--text);
}

.text-large {
  font-size: 18px;
  line-height: var(--line-height-relaxed);
}

.text-small {
  font-size: 14px;
  line-height: var(--line-height-normal);
  color: var(--text-light);
}

.text-caption {
  font-size: 12px;
  font-weight: 500;
  line-height: var(--line-height-tight);
  color: var(--text-lighter);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.text-light {
  color: var(--text-light);
}

.text-lighter {
  color: var(--text-lighter);
}

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

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

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

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

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

/* ================================
   4. 레이아웃 시스템
   ================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-sm {
  max-width: 768px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-lg {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Flexbox 유틸리티 */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-start {
  display: flex;
  align-items: flex-start;
}

.flex-end {
  display: flex;
  align-items: flex-end;
}

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

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
}

.flex-grow {
  flex: 1;
}

/* Grid 시스템 */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

/* 스페이싱 유틸리티 */
.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); }

.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); }

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.my-auto {
  margin-top: auto;
  margin-bottom: auto;
}

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

.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }

.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

/* ================================
   5. 버튼 컴포넌트
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
  user-select: none;
}

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background-color: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn-primary:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--secondary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background-color: var(--secondary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background-color: var(--bg-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Button Sizes */
.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 18px;
}

.btn-block {
  width: 100%;
  display: flex;
}

.btn-icon {
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: 50%;
}

/* ================================
   6. 카드 컴포넌트
   ================================ */
.card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--primary-light);
}

.card-sm {
  padding: var(--spacing-md);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  margin: 0;
}

.card-body {
  margin-bottom: var(--spacing-md);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border);
}

/* ================================
   7. 배지 컴포넌트
   ================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.badge-new {
  background-color: #FFE5CC;
  color: var(--primary-dark);
}

.badge-sale {
  background-color: #FFE5E5;
  color: var(--error);
}

.badge-hot {
  background-color: #FFE5CC;
  color: var(--primary-dark);
  animation: pulse-badge 2s infinite;
}

.badge-success {
  background-color: #E5F2EB;
  color: var(--success);
}

@keyframes pulse-badge {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* ================================
   8. 폼 요소
   ================================ */
.form-group {
  margin-bottom: var(--spacing-lg);
}

label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.3px;
}

.input,
.select,
.textarea {
  width: 100%;
  padding: 12px var(--spacing-md);
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: var(--border-radius-md);
  background-color: var(--white);
  color: var(--text);
  font-family: var(--font-primary);
  transition: var(--transition);
}

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

.input:focus,
.select:focus,
.textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(201, 136, 77, 0.1);
  background-color: var(--white);
}

.input:hover,
.select:hover,
.textarea:hover {
  border-color: var(--primary);
}

.input:disabled,
.select:disabled,
.textarea:disabled {
  background-color: var(--bg-light);
  color: var(--text-lighter);
  cursor: not-allowed;
}

.textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-primary);
}

.select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23C9884D' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 40px;
}

/* 입력 상태 */
.input-error {
  border-color: var(--error);
}

.input-error:focus {
  box-shadow: 0 0 0 3px rgba(198, 107, 107, 0.1);
}

.input-success {
  border-color: var(--success);
}

.form-error {
  display: block;
  font-size: 12px;
  color: var(--error);
  margin-top: 4px;
  font-weight: 500;
}

.form-help {
  display: block;
  font-size: 12px;
  color: var(--text-lighter);
  margin-top: 4px;
}

/* Checkbox & Radio */
.checkbox,
.radio {
  display: flex;
  align-items: center;
  cursor: pointer;
  margin-bottom: var(--spacing-sm);
}

.checkbox input[type="checkbox"],
.radio input[type="radio"] {
  width: 20px;
  height: 20px;
  margin-right: var(--spacing-sm);
  cursor: pointer;
  accent-color: var(--primary);
}

.checkbox label,
.radio label {
  margin-bottom: 0;
  cursor: pointer;
  font-weight: 500;
}

/* ================================
   9. 상품 카드
   ================================ */
.product-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
  border-color: var(--primary-light);
}

.product-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  background-color: var(--bg-light);
  overflow: hidden;
  position: relative;
}

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.product-card:hover .product-img img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 10;
}

.product-info {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-category {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.product-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.product-description {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
  flex: 1;
}

.product-rating {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  gap: 4px;
}

.star {
  font-size: 14px;
  color: #FFB84D;
}

.product-price {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.price-current {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.price-original {
  font-size: 16px;
  color: var(--text-lighter);
  text-decoration: line-through;
}

.product-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: auto;
}

.product-actions .btn {
  flex: 1;
}

.product-actions .btn-icon {
  flex: 0;
  width: 44px;
}

/* ================================
   10. 네비게이션
   ================================ */
.header {
  background-color: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-lg);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  letter-spacing: -0.5px;
  font-family: var(--font-serif);
}

.logo:hover {
  color: var(--primary-dark);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  letter-spacing: 0.3px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  width: 100%;
}

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

.cart-icon,
.account-icon {
  position: relative;
  font-size: 24px;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}

.cart-icon:hover,
.account-icon:hover {
  color: var(--primary);
}

.cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--error);
  color: var(--white);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text);
  cursor: pointer;
}

/* ================================
   11. 히어로 섹션
   ================================ */
.hero {
  background: linear-gradient(135deg, #2C2C2C 0%, #4A4A4A 100%);
  color: var(--white);
  padding: 120px var(--spacing-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(201, 136, 77, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(201, 136, 77, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 20px;
  font-weight: 300;
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
  opacity: 0.95;
}

.hero-btn {
  display: inline-flex;
  gap: var(--spacing-md);
}

.hero-btn .btn {
  min-width: 160px;
}

/* ================================
   12. 푸터
   ================================ */
.footer {
  background-color: var(--secondary);
  color: var(--white);
  padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: var(--spacing-lg);
  font-size: 18px;
}

.footer-section a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  transition: var(--transition);
  font-size: 14px;
}

.footer-section a:hover {
  color: var(--primary);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
  font-size: 18px;
}

.social-link:hover {
  background-color: var(--primary);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-copyright {
  text-align: center;
  flex: 1;
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: var(--transition);
  margin: 0;
  font-size: 13px;
}

.footer-links a:hover {
  color: var(--primary);
}

/* ================================
   13. 추가 컴포넌트
   ================================ */

/* 페이지네이션 */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-xl) 0;
}

.pagination-item {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border);
  background-color: var(--white);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.pagination-item:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.pagination-item.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

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

/* 알림 / Alert */
.alert {
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  border-left: 4px solid;
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert-success {
  background-color: #E5F2EB;
  border-color: var(--success);
  color: var(--success);
}

.alert-error {
  background-color: #FFE5E5;
  border-color: var(--error);
  color: var(--error);
}

.alert-warning {
  background-color: #FFF3E5;
  border-color: var(--warning);
  color: #D4A574;
}

.alert-info {
  background-color: #E5F0FF;
  border-color: #4D9FFF;
  color: #4D9FFF;
}

.alert-close {
  background: none;
  border: none;
  color: inherit;
  font-size: 20px;
  cursor: pointer;
  opacity: 0.6;
  transition: var(--transition);
  margin-left: auto;
}

.alert-close:hover {
  opacity: 1;
}

/* 모달 오버레이 */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(44, 44, 44, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

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

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
}

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

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* 탭 */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.tab {
  padding: var(--spacing-md) 0;
  background: none;
  border: none;
  color: var(--text-light);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  white-space: nowrap;
  font-size: 16px;
}

.tab:hover {
  color: var(--primary);
}

.tab.active {
  color: var(--primary);
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ================================
   14. 스크롤 애니메이션
   ================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: var(--transition-slow);
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: var(--transition-slow);
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition: var(--transition-slow);
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* ================================
   15. 유틸리티 클래스
   ================================ */
.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

.hidden-mobile {
  display: block;
}

.visible-mobile {
  display: none;
}

.overflow-hidden {
  overflow: hidden;
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

.rounded-sm {
  border-radius: var(--border-radius-sm);
}

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

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

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

.rounded-full {
  border-radius: 50%;
}

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

.shadow-md {
  box-shadow: var(--shadow-md);
}

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

.shadow-none {
  box-shadow: none;
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

.font-medium {
  font-weight: 500;
}

.font-normal {
  font-weight: 400;
}

.font-light {
  font-weight: 300;
}

.italic {
  font-style: italic;
}

.underline {
  text-decoration: underline;
}

.no-wrap {
  white-space: nowrap;
}

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ================================
   16. 반응형 디자인 (모바일 768px 이하)
   ================================ */
@media (max-width: 768px) {
  :root {
    --spacing-2xl: 32px;
  }

  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

  h3 {
    font-size: 24px;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .grid-auto {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .hidden-mobile {
    display: none !important;
  }

  .visible-mobile {
    display: block !important;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--white);
    border-bottom: 1px solid var(--border);
    gap: 0;
    padding: var(--spacing-lg) 0;
  }

  .nav.active {
    display: flex;
  }

  .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border);
  }

  .hero {
    padding: 80px var(--spacing-md);
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .hero-btn {
    flex-direction: column;
  }

  .hero-btn .btn {
    width: 100%;
  }

  .product-img {
    height: 200px;
  }

  .product-card:hover {
    transform: translateY(-3px);
  }

  .btn {
    padding: 10px 24px;
    font-size: 15px;
  }

  .btn-lg {
    padding: 14px 32px;
    font-size: 16px;
  }

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

  .modal {
    width: 95%;
    margin: var(--spacing-md);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .tabs {
    gap: var(--spacing-md);
    overflow-x: auto;
  }

  .tab {
    padding: var(--spacing-md);
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 20px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .grid-auto {
    grid-template-columns: 1fr;
  }

  .flex-between {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
  }

  .product-actions {
    flex-direction: column;
  }

  .product-actions .btn-icon {
    width: 100%;
  }

  .pagination-item {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .alert {
    flex-direction: column;
  }

  .alert-close {
    margin-left: 0;
  }

  .modal-footer {
    flex-direction: column;
  }

  .modal-footer .btn {
    width: 100%;
  }
}

/* ================================
   17. 다크모드 지원 (선택사항)
   ================================ */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1A1A1A;
    --bg-light: #252525;
    --text: #E5E5E5;
    --text-light: #B0B0B0;
    --border: #333333;
    --white: #1A1A1A;
  }

  .card {
    background-color: var(--bg-light);
    border-color: var(--border);
  }

  .input,
  .select,
  .textarea {
    background-color: var(--bg-light);
    color: var(--text);
    border-color: var(--border);
  }

  .product-card {
    background-color: var(--bg-light);
    border-color: var(--border);
  }

  .modal {
    background-color: var(--bg-light);
  }
}

/* ================================
   18. 인쇄 스타일
   ================================ */
@media print {
  .header,
  .footer,
  .btn-primary,
  .btn-secondary,
  .menu-toggle {
    display: none !important;
  }

  body {
    background-color: var(--white);
    color: var(--text);
  }

  .card,
  .product-card {
    box-shadow: none;
    border: 1px solid var(--border);
  }
}

이제 완성도 높은 CSS 디자인 시스템이 준비되었습니다. 이 시스템의 주요 특징은:

**✨ 핵심 특징:**

1. **CSS 변수** - 모든 색상, 스페이싱, 그림자가 관리됨
2. **완성된 타이포그래피** - h1~h6, p, 본문, 캡션의 계층 구조
3. **풍부한 컴포넌트** - 버튼, 카드, 배지, 폼, 상품카드 등
4. **반응형** - 768px, 480px 브레이크포인트 포함
5. **애니메이션** - 부드러운 트랜지션과 스크롤 애니메이션
6. **접근성** - focus 상태, 폼 유효성 표시 등
7. **빈티지 감성** - 따뜻한 커피색(#C9884D)과 소박한 디자인
8. **다크모드 지원** - prefers-color-scheme 포함

모든 코드는 프로덕션 레벨의 품질을 유지하고 있습니다!