body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0b0c10;
    color: #eaeaea;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
}

.card {
    background: #15171c;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

.controls {
    display: flex;
    gap: 20px;
    align-items: center;
    justify-content: space-between;
}

select,
input {
    background: #1f2228;
    border: none;
    color: white;
    padding: 8px;
    border-radius: 6px;
}

button {
    background: #00d1ff;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background: #00aacc;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
}

.metric {
    background: #15171c;
    padding: 15px;
    border-radius: 10px;
}

.metric h3 {
    margin: 0;
    font-size: 14px;
    color: #aaa;
}

.metric p {
    font-size: 18px;
    margin: 5px 0 0;
}

.sheet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

.sheet-card {
    background: #1f2228;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: 0.2s;
}

.sheet-card:hover {
    background: #2a2f38;
}

.sheet-card.selected {
    background: #00d1ff;
    color: black;
    font-weight: bold;
}