/* Main Stylesheet for Auction Marketplace */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

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

/* Header */
header {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

header h1 {
    display: inline-block;
    margin-right: 2rem;
}

header nav {
    display: inline-block;
}

header nav a {
    color: white;
    text-decoration: none;
    margin: 0 1rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

header nav a:hover {
    background: rgba(255,255,255,0.1);
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

/* Flash Messages */
.flash-success {
    background: #d4edda;
    color: #155724;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    border-left: 4px solid #28a745;
}

.flash-error {
    background: #f8d7da;
    color: #721c24;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    border-left: 4px solid #dc3545;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.3s;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #229954;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

/* Forms */
.form-group {
    margin: 1rem 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
}

th {
    background: #34495e;
    color: white;
    font-weight: 600;
}

tr:hover {
    background: #f8f9fa;
}

/* Listing Grid */
.listing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.listing-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.listing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.listing-image {
    width: 100%;
    height: 200px;
    background: #ecf0f1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #95a5a6;
}

.listing-details {
    padding: 1rem;
}

.listing-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.listing-price {
    font-size: 1.3rem;
    color: #27ae60;
    font-weight: bold;
}

.listing-time {
    color: #e74c3c;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Wallet Display */
.wallet-balance {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.balance-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.balance-card h3 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.balance-card .amount {
    font-size: 2rem;
    font-weight: bold;
}

.balance-card .available {
    font-size: 0.9rem;
    margin-top: 0.5rem;
    opacity: 0.8;
}

/* Bid History */
.bid-list {
    max-height: 400px;
    overflow-y: auto;
}

.bid-item {
    padding: 1rem;
    border-bottom: 1px solid #ecf0f1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bid-item:last-child {
    border-bottom: none;
}

.bid-user {
    font-weight: 600;
}

.bid-amount {
    font-size: 1.2rem;
    color: #27ae60;
}

.bid-time {
    color: #95a5a6;
    font-size: 0.85rem;
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
}

footer a {
    color: #3498db;
    text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
    .listing-grid {
        grid-template-columns: 1fr;
    }
    
    header nav {
        display: block;
        margin-top: 1rem;
    }
    
    .wallet-balance {
        grid-template-columns: 1fr;
    }
}

/* Loading Spinner */
.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

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

/* Countdown Timer */
.countdown {
    font-size: 1.5rem;
    font-weight: bold;
    color: #e74c3c;
    text-align: center;
    padding: 1rem;
    background: #fff3cd;
    border-radius: 8px;
    margin: 1rem 0;
}