/* 전역 스타일 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
}

/* 헤더 */
.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1920px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-dark);
}

.user-info i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

/* 컨테이너 */
.container {
    display: flex;
    margin-top: 70px;
    max-width: 1920px;
    margin-left: auto;
    margin-right: auto;
}

/* 사이드바 */
.sidebar {
    width: 250px;
    background-color: var(--white);
    border-right: 1px solid var(--border-color);
    position: fixed;
    left: 0;
    top: 70px;
    bottom: 0;
    overflow-y: auto;
    padding: 1rem 0;
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

.nav-item.active {
    background-color: #eef2ff;
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

.nav-item i {
    font-size: 1.125rem;
    width: 20px;
    text-align: center;
}

/* 메인 콘텐츠 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 2rem;
    min-height: calc(100vh - 70px);
}

.page-content {
    display: none;
}

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

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.875rem;
    font-weight: 600;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 대시보드 카드 */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.card-primary .card-icon {
    background-color: var(--primary-color);
}

.card-success .card-icon {
    background-color: var(--success-color);
}

.card-warning .card-icon {
    background-color: var(--warning-color);
}

.card-danger .card-icon {
    background-color: var(--danger-color);
}

.card-info {
    flex: 1;
}

.card-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.card-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* 콘텐츠 섹션 */
.content-section {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.content-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 테이블 */
.table-container {
    background-color: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.table-container h3 {
    padding: 1rem 1.5rem;
    background-color: var(--light-bg);
    border-bottom: 1px solid var(--border-color);
    font-size: 1.125rem;
    font-weight: 600;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background-color: var(--light-bg);
}

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 2px solid var(--border-color);
    font-size: 0.875rem;
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.data-table tbody tr:hover {
    background-color: var(--light-bg);
}

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

/* 필터 섹션 */
.filter-section {
    background-color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

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

/* 폼 컨트롤 */
.form-control {
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-family: 'Noto Sans KR', sans-serif;
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* 버튼 */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: 'Noto Sans KR', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

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

.btn-success {
    background-color: var(--success-color);
    color: var(--white);
}

.btn-success:hover {
    background-color: #059669;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-secondary:hover {
    background-color: #475569;
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-large {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

/* 판매등록 페이지 */
.sale-container {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 1.5rem;
    height: calc(100vh - 200px);
}

.sale-left, .sale-right {
    background-color: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.search-box {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
}

.search-box .form-control {
    flex: 1;
}

.product-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.product-item {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.product-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.product-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.product-item-brand {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.product-item-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.product-item-price {
    font-weight: 600;
    color: var(--primary-color);
}

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

.cart-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--light-bg);
}

.cart-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.empty-cart {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.empty-cart i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.cart-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    margin-bottom: 0.75rem;
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.cart-item-price {
    font-size: 0.75rem;
    color: var(--text-light);
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quantity-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    border-radius: 0.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.quantity-value {
    width: 40px;
    text-align: center;
    font-weight: 600;
}

.cart-item-subtotal {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 80px;
    text-align: right;
}

.remove-btn {
    color: var(--danger-color);
    cursor: pointer;
    padding: 0.25rem;
    transition: all 0.2s;
}

.remove-btn:hover {
    color: #dc2626;
    transform: scale(1.1);
}

.cart-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-bg);
}

.total-amount {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    font-size: 1.125rem;
}

.total-amount strong {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.payment-method {
    margin-bottom: 1rem;
}

.payment-method label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
}

.payment-method .form-control {
    width: 100%;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 0.75rem;
}

/* 리포트 탭 */
.report-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    cursor: pointer;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

.tab-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.report-content {
    display: none;
}

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

.report-filters {
    background-color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.summary-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.summary-value {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* 상태 배지 */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background-color: #dbeafe;
    color: #1e40af;
}

/* 모달 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s;
}

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

.modal-content {
    background-color: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s;
}

.modal-close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    transition: all 0.2s;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

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

#modal-body {
    padding: 2rem;
}

.modal-header {
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.form-group .form-control,
.form-group select,
.form-group textarea {
    width: 100%;
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

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

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 반응형 디자인 */
@media (max-width: 1024px) {
    .sidebar {
        width: 200px;
    }

    .main-content {
        margin-left: 200px;
    }

    .sale-container {
        grid-template-columns: 1fr;
        height: auto;
    }

    .sale-right {
        height: 500px;
    }

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

@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar .nav-item span {
        display: none;
    }

    .main-content {
        margin-left: 60px;
        padding: 1rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .dashboard-cards {
        grid-template-columns: 1fr;
    }

    .filter-section {
        flex-direction: column;
        align-items: stretch;
    }

    .report-tabs {
        flex-direction: column;
    }

    .report-summary {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        margin: 0.5rem;
    }
}

/* 로딩 스피너 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
}

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

/* 스크롤바 커스터마이징 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}