html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #fff;
    display: flex;
    flex-direction: column;
}

.container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Split screen into two halves */
.top-half {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 8px;
    padding: 10px;
    box-sizing: border-box;
}

/* Dashboard tiles */
.tile {
    background: #f4f4f4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
    padding: 10px;
    box-sizing: border-box;
}

/* Bottom half for Add Transaction */
.bottom-half {
    flex: 1;
    padding: 15px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.bottom-half h2 {
    margin-top: 0;
}

button, input, select {
    width: 100%;
    padding: 14px;
    margin-top: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 16px;
    box-sizing: border-box;
}

.income { color: green; }
.expense { color: red; }