/* Global Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    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: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

header .attribution {
    font-size: 1rem;
    font-style: italic;
    opacity: 0.8;
    margin-top: 0.5rem;
}

/* Section Styles */
section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
}

section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--light-color);
}

section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Route Selector */
.route-selector {
    text-align: center;
}

.route-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.route-btn {
    padding: 1rem 2rem;
    font-size: 1rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
    font-weight: bold;
}

.route-btn:hover {
    background-color: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
}

.route-btn.active {
    background-color: var(--secondary-color);
    color: white;
    box-shadow: var(--box-shadow);
}

/* Shipping Options */
.shipping-options {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
}

.filters {
    grid-row: span 2;
}

.filter-group {
    margin-bottom: 1.5rem;
}

.filter-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.filter-group input[type="range"] {
    width: 100%;
    margin-bottom: 0.5rem;
}

.filter-group select {
    width: 100%;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    border: 1px solid #ddd;
}

/* Visualization */
.visualization {
    margin-bottom: 2rem;
}

.chart-container {
    height: 300px;
    position: relative;
}

/* Results */
.sort-options {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.sort-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

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

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

.shipping-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.shipping-card {
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.shipping-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.shipping-card .provider {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.shipping-card .method {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: var(--light-color);
    border-radius: 4px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.shipping-card .price {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.shipping-card .delivery-time {
    margin-bottom: 1rem;
}

.shipping-card .features {
    margin-bottom: 1rem;
}

.shipping-card .feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.shipping-card .feature i {
    color: var(--success-color);
}

.shipping-card .select-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.shipping-card .select-btn:hover {
    background-color: var(--primary-color);
}

.shipping-card .best-value {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--success-color);
    color: white;
    padding: 0.25rem 1rem;
    transform: rotate(45deg) translate(20%, -50%);
    transform-origin: top right;
    font-size: 0.8rem;
    font-weight: bold;
}

.shipping-card .fastest {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--info-color);
    color: white;
    padding: 0.25rem 1rem;
    transform: rotate(45deg) translate(20%, -50%);
    transform-origin: top right;
    font-size: 0.8rem;
    font-weight: bold;
}

.shipping-card .cheapest {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--warning-color);
    color: white;
    padding: 0.25rem 1rem;
    transform: rotate(45deg) translate(20%, -50%);
    transform-origin: top right;
    font-size: 0.8rem;
    font-weight: bold;
}

/* Comparison Table */
.comparison-table {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

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

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

.comparison-table th {
    background-color: var(--light-color);
    color: var(--primary-color);
    font-weight: 600;
}

.comparison-table tr:hover {
    background-color: rgba(236, 240, 241, 0.5);
}

.export-options {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.export-btn, .clear-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

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

.export-btn:hover {
    background-color: #1a252f;
}

.clear-btn {
    background-color: var(--light-color);
    color: var(--dark-color);
}

.clear-btn:hover {
    background-color: #ddd;
}

/* Shipping Details */
.details-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    border: 1px solid #ddd;
}

.dimensions-inputs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dimensions-inputs input {
    flex: 1;
}

.dimensions-inputs span {
    color: #777;
}

.update-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    grid-column: 1 / -1;
    justify-self: start;
}

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

/* Sources Section */
.sources-list {
    margin-top: 1rem;
}

.sources-list ul {
    list-style-type: none;
    margin-bottom: 1.5rem;
}

.sources-list li {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

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

.sources-list .provider-name {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.sources-list .source-link {
    display: block;
    margin-top: 0.25rem;
    color: var(--secondary-color);
    word-break: break-all;
}

.sources-list .disclaimer {
    font-style: italic;
    color: #777;
    margin-top: 1rem;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

footer p {
    margin-bottom: 0.5rem;
}

footer .disclaimer {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .shipping-options {
        grid-template-columns: 1fr;
    }
    
    .filters {
        grid-row: auto;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    section {
        padding: 1.5rem;
    }
    
    .route-buttons {
        flex-direction: column;
    }
    
    .shipping-cards {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.shipping-card {
    animation: fadeIn 0.5s ease forwards;
}

.shipping-card:nth-child(2) {
    animation-delay: 0.1s;
}

.shipping-card:nth-child(3) {
    animation-delay: 0.2s;
}

.shipping-card:nth-child(4) {
    animation-delay: 0.3s;
}

.shipping-card:nth-child(5) {
    animation-delay: 0.4s;
}

.shipping-card:nth-child(6) {
    animation-delay: 0.5s;
}