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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f9fafb;
    color: #111827;
    line-height: 1.6;
}

body.rtl {
    direction: rtl;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    background-color: white;
    border-bottom: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: #111827;
    text-decoration: none;
}

.logo svg {
    width: 2rem;
    height: 2rem;
    color: #2563eb;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.lang-selector {
    position: relative;
}

.lang-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background-color 0.2s;
}

.lang-button:hover {
    background-color: #f9fafb;
}

.lang-dropdown {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    min-width: 12rem;
    display: none;
    z-index: 50;
}

.lang-dropdown.show {
    display: block;
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
    text-decoration: none;
    color: #111827;
}

.lang-option:hover {
    background-color: #f9fafb;
}

.lang-option.active {
    background-color: #eff6ff;
}

.hero {
    background: linear-gradient(to right, #2563eb, #1d4ed8);
    color: white;
    padding: 3rem 1.5rem;
    border-radius: 0.5rem;
    margin: 2rem 0;
}

.hero h2 {
    font-size: 1.875rem;
    font-weight: bold;
    margin-bottom: 0.75rem;
}

.hero p {
    font-size: 1.125rem;
    color: #bfdbfe;
}

.search-bar {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 250px;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cpath d='m21 21-4.35-4.35'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 0.75rem center;
}

.search-input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.category-select {
    padding: 0.5rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
    background: white;
    cursor: pointer;
}

.category-select:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.datasets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.dataset-card {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    padding: 1.5rem;
    transition: all 0.3s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.dataset-card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.dataset-icon {
    width: 3rem;
    height: 3rem;
    background-color: #dbeafe;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.dataset-icon svg {
    width: 1.5rem;
    height: 1.5rem;
    color: #2563eb;
}

.dataset-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #111827;
}

.dataset-card p {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.dataset-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    color: #6b7280;
}

.dataset-category {
    background-color: #f3f4f6;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background-color: #2563eb;
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: white;
    color: #374151;
    border: 1px solid #d1d5db;
}

.btn-secondary:hover {
    background-color: #f9fafb;
}

.detail-header {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.detail-header h2 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.detail-header p {
    color: #6b7280;
    margin-bottom: 1rem;
}

.filters-section, .preview-section {
    background: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin: 2rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.filters-section h3, .preview-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.filter-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.25rem;
}

.filter-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.table-container {
    overflow-x: auto;
}

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

thead {
    background-color: #f9fafb;
}

th {
    padding: 0.75rem 1.5rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 500;
    color: #6b7280;
    text-transform: uppercase;
    border-bottom: 1px solid #e5e7eb;
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.875rem;
}

tbody tr:hover {
    background-color: #f9fafb;
}

.download-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-bottom: 1rem;
}

.login-container {
    max-width: 28rem;
    margin: 4rem auto;
    background: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.login-container h2 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.25rem;
}

.form-group input {
    width: 100%;
    padding: 0.5rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.error-message {
    background-color: #fef2f2;
    color: #dc2626;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.success-message {
    background-color: #f0fdf4;
    color: #16a34a;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

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

.mt-4 {
    margin-top: 1rem;
}

.link {
    color: #2563eb;
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

.no-data {
    text-align: center;
    padding: 3rem;
    color: #6b7280;
}

@media (max-width: 768px) {
    .datasets-grid {
        grid-template-columns: 1fr;
    }

    .search-bar {
        flex-direction: column;
    }

    .search-input {
        width: 100%;
    }
}