/* Global Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --danger-color: #e74c3c;
    --light-gray: #f4f4f4;
    --dark-gray: #333;
    --mid-gray: #666;
    --card-shadow: 0 2px 5px rgba(0,0,0,0.1);
    --modal-shadow: 0 5px 15px rgba(0,0,0,0.3);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: #f9f9f9;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background-color: white;
    box-shadow: var(--card-shadow);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

header h1 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.search-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    justify-content: space-between;
}

.search-container {
    display: flex;
    flex: 1;
    min-width: 200px;
}

.search-container input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px 0 0 4px;
    outline: none;
}

.search-container button {
    padding: 10px 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.search-container button:hover {
    background-color: var(--secondary-color);
}

.filter-container {
    display: flex;
    gap: 10px;
}

.filter-container select {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    outline: none;
    background-color: white;
}

/* Button Styles */
.btn-primary {
    padding: 10px 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

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

.btn-secondary {
    padding: 10px 15px;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.btn-secondary:hover {
    background-color: #e0e0e0;
}

.btn-danger {
    padding: 10px 15px;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

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

/* Cards Grid */
main {
    padding: 30px 0;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid #eee;
}

.card-image-placeholder {
    width: 100%;
    height: 180px;
    background-color: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--mid-gray);
    font-size: 2rem;
    border-bottom: 1px solid #eee;
}

.card-content {
    padding: 15px;
}

.card-content h3 {
    margin-bottom: 5px;
    color: var(--dark-gray);
}

.card-meta {
    color: var(--mid-gray);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.card-price {
    font-weight: bold;
    color: var(--primary-color);
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--card-shadow);
}

.empty-state i {
    font-size: 3rem;
    color: var(--mid-gray);
    margin-bottom: 15px;
}

.empty-state p {
    color: var(--mid-gray);
    max-width: 400px;
    margin: 0 auto;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 20;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow-y: auto;
}

.modal-content {
    background-color: white;
    margin: 50px auto;
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--modal-shadow);
    width: 90%;
    max-width: 800px;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--mid-gray);
}

#modal-title {
    margin-bottom: 20px;
    color: var(--primary-color);
}

/* Form Styles */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    outline: none;
}

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

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

/* Card Detail View */
.card-detail-container {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.card-image-container {
    flex: 1;
    min-width: 250px;
}

#view-card-image {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: var(--card-shadow);
}

.card-info-container {
    flex: 2;
    min-width: 300px;
}

.card-info-container h2 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.card-info-container p {
    margin-bottom: 10px;
}

.notes-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.notes-section h3 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.card-actions {
    margin-top: 30px;
    display: flex;
    gap: 10px;
}

#no-image-text {
    text-align: center;
    color: var(--mid-gray);
    padding: 30px;
    background-color: var(--light-gray);
    border-radius: 4px;
}

/* Footer */
footer {
    background-color: white;
    padding: 20px 0;
    margin-top: 50px;
    box-shadow: 0 -2px 5px rgba(0,0,0,0.05);
}

footer p {
    text-align: center;
    color: var(--mid-gray);
}

/* Utility Classes */
.hidden {
    display: none;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .search-filter {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-container {
        width: 100%;
    }
    
    #add-card-btn {
        width: 100%;
        margin-top: 10px;
    }
    
    .card-detail-container {
        flex-direction: column;
    }
}