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

body {
    background-color: #121212;
    color: white;
    font-family: Arial, sans-serif;
    height: 100vh;
    overflow: hidden;
    transition: background 0.3s, color 0.3s;
}

.light-mode {
    background-color: #f5f5f5;
    color: black;
}

.dropdown {
    position: absolute;
    top: -200px;
    left: 0;
    width: 100%;
    background: rgba(20, 20, 20, 0.95);
    padding: 10px;
    transition: top 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-bottom: 2px solid #444;
    z-index: 1000;
}

.symbol-row,
.button-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.dropdown input {
    width: 150px;
    padding: 5px;
    margin: 5px;
    background: #222;
    color: white;
    border: 1px solid #555;
    text-align: center;
}

.light-mode .dropdown input {
    background: #fff;
    color: #000;
    border: 1px solid #999;
}

.dropdown button {
    margin: 5px;
    padding: 8px 12px;
    background: #333;
    color: white;
    border: none;
    cursor: pointer;
}

.dropdown button:hover {
    background: #555;
}

.light-mode .dropdown button {
    background: #ddd;
    color: #000;
}

.light-mode .dropdown button:hover {
    background: #bbb;
}

.grid-container {
    display: grid;
    width: 100%;
    height: 100%;
    padding: 10px;
    gap: 10px;
}

.chart {
    width: 100%;
    height: 100%;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: transparent;
}