/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links li {
    margin: 0;
}

.nav-category {
    margin-left: 1rem;
    margin-right: 0.5rem;
}

.nav-category:first-child {
    margin-left: 0;
}

.nav-category span {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.5rem;
    border-left: 2px solid rgba(255, 255, 255, 0.3);
    padding-left: 0.75rem;
}

.nav-links li:not(.nav-category) {
    margin-left: 0.5rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
}

/* Search Section */
.search-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.search-section h2 {
    margin-bottom: 1.5rem;
    color: #667eea;
}

.search-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: end;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    width: 100%;
}

.form-group {
    flex: 1;
    min-width: 150px;
}

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

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* Quote Section */
.quote-section {
    margin-bottom: 2rem;
}

.quote-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.quote-card h3 {
    margin-bottom: 1rem;
    color: #333;
}

.quote-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.price {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
}

.change {
    font-size: 1.2rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
}

.change.positive {
    color: #10b981;
    background-color: #d1fae5;
}

.change.negative {
    color: #ef4444;
    background-color: #fee2e2;
}

/* Chart Container */
.chart-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    height: 500px;
    position: relative;
}

/* Data Table */
.data-table-container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.data-table-container h3 {
    margin-bottom: 1rem;
    color: #667eea;
}

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

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

.data-table thead {
    background-color: #667eea;
    color: white;
}

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

.data-table tbody tr:hover {
    background-color: #f9f9f9;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

/* Results Section */
.results-section {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.results-section h3 {
    margin-bottom: 1.5rem;
    color: #667eea;
}

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

.result-card {
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s;
}

.result-card:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
    transform: translateY(-2px);
}

.result-card h4 {
    margin-bottom: 0.5rem;
}

.result-card h4 a {
    color: #667eea;
    text-decoration: none;
}

.result-card h4 a:hover {
    text-decoration: underline;
}

.result-card .company-name {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.result-card .exchange,
.result-card .country {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

/* Footer */
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: auto;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

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

    .form-group {
        width: 100%;
    }

    .quote-info {
        flex-direction: column;
        align-items: flex-start;
    }

    .chart-container {
        height: 400px;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }
}

/* News Cards Hover Effect */
.news-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

/* Research Cards Hover Effect */
.research-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}