:root {
    --primary-color: #2C3E50;
    --secondary-color: #34495E;
    --success-color: #27AE60;
    --danger-color: #E74C3C;
    --warning-color: #F39C12;
    --light-bg: #ECF0F1;
    --dark-text: #2C3E50;
    --light-text: #FFFFFF;
    --disabled-color: #95A5A6;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Roboto', 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light-bg);
    color: var(--dark-text);
    font-size: 14px;
}

.stock-simulator-container {
    max-width: 100%;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.simulator-header {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 10px;
    margin-bottom: 0;
    box-shadow: var(--shadow);
}

.simulator-header h1 {
    margin: 0;
    font-size: 1.2em;
    font-weight: 300;
    color: var(--light-text);
}

.simulator-main {
    display: flex;
    flex-direction: column;
}

.overview-section, .chart-section, .controls-section {
    background-color: var(--light-text);
    box-shadow: var(--shadow);
    padding: 10px;
    margin-bottom: 10px;
}

.chart-section {
    position: relative;
}

.chart-container {
    height: 60vh;
    width: 100%;
    position: relative;
}

.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}

#chart-options-menu {
    background-color: var(--light-bg);
    border-radius: 4px;
    padding: 10px;
}

#chart-options-menu label {
    display: block;
    margin-bottom: 5px;
}

.automatic-signals {
    margin-top: 10px;
    border-top: 1px solid var(--primary-color);
    padding-top: 10px;
}

.automatic-signals h4 {
    margin-top: 0;
    margin-bottom: 5px;
}

.index-selection, .index-display {
    margin-bottom: 10px;
}

.index-selection select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg fill="%232C3E50" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px;
}

.index-info {
    font-size: 1.1em;
    font-weight: bold;
    margin-top: 5px;
}

.chart-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.portfolio-summary {
    background-color: var(--light-bg);
    padding: 10px;
    border-radius: 4px;
    font-size: 14px;
    text-align: center;
    width: 100%;
}

.portfolio-summary p {
    margin: 3px 0;
}

.trading-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    width: 100%;
}

.trade-button {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    font-size: 14px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    font-weight: bold;
    color: var(--light-text);
    box-shadow: var(--shadow);
    min-width: 70px;
}

.trade-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.buy-button {
    background-color: var(--success-color);
}

.sell-button {
    background-color: var(--danger-color);
}

.close-all-button {
    background-color: var(--warning-color);
    color: var(--dark-text);
}

.close-all-button:disabled {
    background-color: var(--disabled-color);
    color: var(--dark-text);
    cursor: not-allowed;
}

.close-all-button:disabled:hover {
    transform: none;
    box-shadow: var(--shadow);
}

.shares-to-trade-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
}

.shares-to-trade-controls button {
    background-color: var(--primary-color);
    color: var(--light-text);
    border: none;
    border-radius: 4px;
    padding: 5px 10px;
    cursor: pointer;
    transition: var(--transition);
}

.shares-to-trade-controls button:hover {
    background-color: var(--secondary-color);
}

#shares-to-trade {
    width: 50px;
    text-align: center;
    margin: 0 10px;
    padding: 5px;
    border: 1px solid var(--primary-color);
    border-radius: 4px;
}

.reset-button {
    width: 100%;
    padding: 10px;
    background-color: var(--primary-color);
    color: var(--light-text);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    text-transform: uppercase;
    font-weight: bold;
    margin-top: 10px;
}

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

.trading-speed-controls {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    width: 100%;
}

.trading-speed-controls button {
    flex: 1;
    margin: 0 3px;
    background-color: var(--secondary-color);
    color: var(--light-text);
    font-size: 18px;
    padding: 8px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.news-feed, .historical-data {
    background-color: var(--light-text);
    box-shadow: var(--shadow);
    padding: 10px;
    margin-top: 10px;
}

.news-feed h2, .historical-data h2 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.news-item {
    background-color: var(--light-bg);
    padding: 10px;
    border-radius: 4px;
    margin-bottom: 10px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.news-item:hover {
    transform: translateX(3px);
    border-left-color: var(--primary-color);
}

.news-item.positive {
    border-left: 3px solid var(--success-color);
}

.news-item.negative {
    border-left: 3px solid var(--danger-color);
}

.news-item h4 {
    margin: 0 0 5px 0;
    font-size: 14px;
}

.news-item p {
    margin: 3px 0;
    font-size: 12px;
}

.positive {
    color: var(--success-color);
}

.negative {
    color: var(--danger-color);
}

.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 10px;
}

#historical-data-table {
    font-size: 12px;
    width: 100%;
}

#historical-data-table th,
#historical-data-table td {
    padding: 4px;
    text-align: right;
}

#historical-data-table th:first-child,
#historical-data-table td:first-child,
#historical-data-table th:nth-child(2),
#historical-data-table td:nth-child(2) {
    text-align: left;
}

#historical-data-table th {
    font-weight: bold;
    background-color: var(--primary-color);
    color: var(--light-text);
}

#historical-data-table tr:nth-child(even) {
    background-color: var(--light-bg);
}

#speed-indicator {
    margin-top: 10px;
    text-align: center;
    font-weight: bold;
}

.view-all-button, .export-button {
    margin-top: 10px;
    padding: 8px 16px;
    background-color: var(--secondary-color);
    color: var(--light-text);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    text-transform: uppercase;
    font-weight: bold;
    width: 100%;
}

.view-all-button:hover, .export-button:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.huge-bold {
    font-size: 19px;
    font-weight: bold;
}

/* Responsive design */
@media (max-width: 767px) {
    .stock-simulator-container {
        padding: 0;
    }

    .chart-container {
        height: 70vh;
        margin: 0;
        padding: 0;
    }

    .huge-bold {
        font-size: 17px;
    }

    #historical-data-table {
        font-size: 12px;
    }

    #historical-data-table th, #historical-data-table td {
        padding: 6px;
        font-size: 11px;
    }

    .view-all-button, .export-button {
        font-size: 12px;
        padding: 8px;
    }
}

@media (min-width: 768px) {
    .stock-simulator-container {
        padding: 0;
    }

    .chart-controls {
        flex-direction: row;
    }

    .huge-bold {
        font-size: 23px;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.stock-simulator-container {
    animation: fadeIn 0.5s ease-in-out;
}

.trade-button, .reset-button, .view-all-button, .export-button {
    transition: all 0.3s ease;
}

.trade-button:active, .reset-button:active, .view-all-button:active, .export-button:active {
    transform: scale(0.95);
}

/* Accessibility improvements */
.trade-button:focus, .reset-button:focus, .view-all-button:focus, .export-button:focus,
.trading-speed-controls button:focus, .shares-to-trade-controls button:focus, #shares-to-trade:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improved scrollbar for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Pulse animation for buy button */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(39, 174, 96, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(39, 174, 96, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(39, 174, 96, 0);
    }
}

.buy-button {
    animation: pulse 2s infinite;
}