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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f7fa;
    line-height: 1.6;
    color: #333;
}

input, button, select {
    font-size: 16px;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button {
    background: #3498db;
    color: white;
    cursor: pointer;
    border: none;
    transition: background 0.2s;
}

button:hover {
    background: #2980b9;
}

button:active {
    background: #21618c;
}

/* Navigation */
nav {
    background: #2c3e50;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

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

.nav-brand a {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    display: block;
    padding: 15px 0;
}

.nav-links {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: #ecf0f1;
    text-decoration: none;
    padding: 15px 20px;
    display: block;
    transition: background 0.2s, border-bottom 0.2s;
    border-bottom: 3px solid transparent;
}

.nav-links a:hover {
    background: #34495e;
    border-bottom: 3px solid #3498db;
}

.nav-links a.active {
    background: #3498db;
}

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

/* Chart Page */
.chart-section {
    margin-top: 10px;
}

#controls {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

#controls .control-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

#chart {
    width: 100%;
    height: 600px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: opacity 0.2s;
}

#chart.loading {
    opacity: 0.6;
}

.loading-indicator {
    display: none;
    color: #7f8c8d;
    font-size: 0.9rem;
}

.loading-indicator.show {
    display: block;
}

/* Scanner Page */
.scanner-container {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 10px;
}

.scanner-header {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 30px;
    margin-bottom: 25px;
}

.scanner-title {
    font-size: 2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 20px;
}

.scanner-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    align-items: flex-end;
}

.scanner-controls .control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 200px;
}

.scanner-controls label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.scanner-controls input,
.scanner-controls select {
    width: 100%;
}

.scan-button {
    min-width: 140px;
    padding: 10px 20px;
    font-weight: 600;
}

.scan-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.export-button {
    background: #27ae60;
}

.export-button:hover {
    background: #219150;
}

.results-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.results-header {
    background: #1a1a1a;
    color: white;
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1rem;
}

.results-count {
    background: white;
    color: #1a1a1a;
    border-radius: 20px;
    padding: 4px 14px;
    font-size: 0.85rem;
    font-weight: 600;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(750px, 1fr));
}

.result-card {
    padding: 30px;
    cursor: pointer;
    display: flex;
    gap: 25px;
    align-items: flex-start;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.15s, transform 0.15s;
}

.result-card:hover {
    background: #f8f9ff;
    transform: translateY(-1px);
}

.chart-thumbnail {
    width: 640px;
    height: auto;
    border-radius: 8px;
    object-fit: contain;
    flex-shrink: 0;
}

.chart-placeholder {
    width: 640px;
    height: 200px;
    border-radius: 8px;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: #aaa;
    flex-shrink: 0;
}

.symbol-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.symbol-name {
    font-weight: 700;
    font-size: 1.2rem;
    color: #2c3e50;
}

.symbol-company {
    color: #555;
    font-size: 0.95rem;
}

.symbol-exchange {
    color: #888;
    font-size: 0.85rem;
}

.loading-state {
    padding: 60px;
    text-align: center;
    color: #7f8c8d;
}

.scanner-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f0f0f0;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* Trade Log Page */
h1 {
    margin: 20px 0 16px;
    font-size: 1.8rem;
    color: #2c3e50;
}

.dashboard-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

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

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: #555;
}

tr:hover {
    background: #f5f7fa;
}

.action-tag {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.action-tag.buy {
    color: #27ae60;
    background: #e9f7ef;
}

.action-tag.sell {
    color: #e74c3c;
    background: #fdedec;
}

.symbol-link {
    color: #3498db;
    text-decoration: none;
    font-weight: 600;
}

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

.price-cell {
    font-family: monospace;
    font-weight: 600;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #7f8c8d;
}

/* Portfolio Page */
.portfolio-summary {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 10px;
}

.summary-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 24px;
    text-align: center;
}

.card-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #7f8c8d;
    font-weight: 600;
    margin-bottom: 8px;
}

.card-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: #2c3e50;
    font-family: monospace;
}

.positive {
    color: #27ae60 !important;
}

.negative {
    color: #e74c3c !important;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 0;
    }

    .nav-links {
        width: 100%;
        flex-direction: column;
    }

    .nav-links a {
        padding: 12px 20px;
    }

    #controls {
        flex-direction: column;
        align-items: stretch;
    }

    #controls .control-group {
        flex-direction: column;
    }

    #chart {
        height: 400px;
    }

    .scanner-controls {
        flex-direction: column;
    }

    .scanner-controls .control-group {
        min-width: 100%;
    }

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

    .result-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .chart-thumbnail {
        width: 90%;
        max-width: 480px;
    }

    .chart-placeholder {
        width: 90%;
        max-width: 480px;
    }
}