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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #ffd700;
}

/* Main Content */
main {
    margin-top: 80px;
    padding: 2rem 0;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 4rem 0;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background: #ffd700;
    color: #333;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: #ffed4a;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}

.btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
}

/* Services Grid */
.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    color: white;
}

/* Cards */
.card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.card h3 {
    color: #667eea;
    margin-bottom: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

select.form-control {
    background: white;
    cursor: pointer;
}

/* Progress Bar */
.progress {
    background: #e2e8f0;
    border-radius: 10px;
    height: 20px;
    overflow: hidden;
    margin: 1rem 0;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    transition: width 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Status Timeline */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    position: relative;
}

.timeline-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    margin-right: 1rem;
    z-index: 2;
}

.timeline-icon.completed {
    background: #10b981;
}

.timeline-icon.current {
    background: #f59e0b;
}

.timeline-icon.pending {
    background: #6b7280;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Pricing Table */
.pricing-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.pricing-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border: 3px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-5px);
}

.pricing-card.featured {
    border-color: #667eea;
    transform: scale(1.05);
}

.pricing-card h3 {
    color: #667eea;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 1rem;
}

.price span {
    font-size: 1rem;
    color: #666;
}

.features {
    list-style: none;
    margin-bottom: 2rem;
}

.features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f4f8;
}

.features li:last-child {
    border-bottom: none;
}

/* Calculator */
.calculator {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

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

.calc-result {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    margin-top: 2rem;
}

.calc-result h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.table th {
    background: #f8fafc;
    font-weight: 600;
    color: #667eea;
}

.table tbody tr:hover {
    background: #f8fafc;
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

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

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

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
}

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

.modal-content {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

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

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
}

.close:hover {
    color: #333;
}

/* Footer */
footer {
    background: #2d3748;
    color: white;
    text-align: center;
    padding: 3rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #ffd700;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #ffd700;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .calc-row {
        grid-template-columns: 1fr;
    }
    
    .pricing-table {
        grid-template-columns: 1fr;
    }
    
    .services {
        grid-template-columns: 1fr;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Notification */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    z-index: 1500;
    animation: slideInRight 0.3s ease;
}

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

.notification.error {
    background: #ef4444;
}

.notification.warning {
    background: #f59e0b;
}

.notification.info {
    background: #3b82f6;
}

/* eBay Market Analysis Styles */
.main-content {
    margin-top: 80px; /* 헤더 높이만큼 여백 추가 */
}

.status-section {
    margin-bottom: 2rem;
}

.status-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-dot.connected {
    background: #10b981;
}

.status-dot.disconnected {
    background: #ef4444;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.last-update {
    color: #6b7280;
    font-size: 0.9rem;
}

/* Search Section */
.search-section {
    margin-bottom: 2rem;
}

.search-container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.search-form h2 {
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.search-input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: #667eea;
}

.search-filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-filters select {
    padding: 0.5rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    background: white;
    font-size: 0.9rem;
}

/* Trending Section */
.trending-section {
    margin-bottom: 2rem;
}

.trending-section h2 {
    margin-bottom: 1.5rem;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.trending-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.trending-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.trending-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.card-image {
    height: 150px;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.card-info {
    padding: 1.5rem;
}

.card-info h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.card-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.current-price {
    font-size: 1.3rem;
    font-weight: bold;
    color: #1f2937;
}

.price-change {
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: bold;
}

.price-change.positive {
    background: #dcfce7;
    color: #166534;
}

.price-change.negative {
    background: #fee2e2;
    color: #dc2626;
}

.market-data {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #6b7280;
}

/* Search Results */
.search-results {
    margin-bottom: 2rem;
}

.results-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.results-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.results-count {
    font-weight: 600;
    color: #1f2937;
}

.sort-options select {
    padding: 0.5rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    background: white;
}

.results-grid {
    padding: 1.5rem;
}

.result-card {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    margin-bottom: 1rem;
    transition: box-shadow 0.3s;
}

.result-card:hover {
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
}

.result-image {
    width: 100px;
    height: 100px;
    background: #f3f4f6;
    border-radius: 6px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.result-info {
    flex: 1;
}

.result-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.result-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.result-price .current-price {
    font-size: 1.2rem;
    font-weight: bold;
    color: #1f2937;
}

.bid-count {
    color: #6b7280;
    font-size: 0.9rem;
}

.result-details {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #6b7280;
}

.seller-info {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #6b7280;
}

.result-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.tag.condition {
    background: #dbeafe;
    color: #1e40af;
}

.tag.grade {
    background: #fef3c7;
    color: #92400e;
}

/* Chart Section */
.chart-section {
    margin-bottom: 2rem;
}

.chart-container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.chart-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.chart-tab {
    padding: 0.5rem 1rem;
    border: 2px solid #e5e7eb;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.chart-tab.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.chart-container canvas {
    max-height: 400px;
}

/* Market Stats */
.market-stats {
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.stat-info {
    flex: 1;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: #1f2937;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: #6b7280;
    margin-bottom: 0.25rem;
}

.stat-change {
    font-size: 0.8rem;
    font-weight: 600;
}

.stat-change.positive {
    color: #10b981;
}

.stat-change.negative {
    color: #ef4444;
}

/* Category Analysis */
.category-analysis {
    margin-bottom: 2rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.category-card h3 {
    margin-bottom: 1rem;
    color: #1f2937;
}

.category-stats {
    margin-bottom: 1.5rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.stat-row .price {
    font-weight: bold;
    color: #1f2937;
}

.stat-row .positive {
    color: #10b981;
    font-weight: 600;
}

.stat-row .negative {
    color: #ef4444;
    font-weight: 600;
}

.category-chart {
    height: 100px;
    position: relative;
}

/* Alert Section */
.alert-section {
    margin-bottom: 2rem;
}

.alert-form {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.alert-list {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.alert-list h3 {
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.alert-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-info {
    flex: 1;
}

.alert-card {
    display: block;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 0.25rem;
}

.alert-condition {
    font-size: 0.9rem;
    color: #6b7280;
}

/* Responsive Design */
@media (max-width: 768px) {
    .search-input-group {
        flex-direction: column;
    }
    
    .search-filters {
        flex-direction: column;
    }
    
    .trending-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .result-card {
        flex-direction: column;
    }
    
    .result-image {
        width: 100%;
        height: 150px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .chart-tabs {
        flex-wrap: wrap;
    }
    
    .results-header {
        flex-direction: column;
        gap: 1rem;
    }
}