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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: #1a1a2e;
    color: #e0e0e0;
    min-height: 100vh;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    color: #b388ff;
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

body > p {
    color: #999;
    margin-bottom: 2rem;
}

form {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

fieldset {
    border: 1px solid #2d2d44;
    border-radius: 8px;
    padding: 1.25rem;
    background-color: #22223a;
}

legend {
    color: #b388ff;
    font-weight: 600;
    padding: 0 0.5rem;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem 1.5rem;
}

fieldset label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 0;
    font-size: 0.95rem;
}

input[type="number"] {
    width: 80px;
    padding: 0.4rem 0.5rem;
    border: 1px solid #3d3d5c;
    border-radius: 4px;
    background-color: #1a1a2e;
    color: #e0e0e0;
    font-size: 0.95rem;
    text-align: center;
}

input[type="number"]:focus {
    outline: none;
    border-color: #b388ff;
}

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #b388ff;
    margin-right: 0.5rem;
}

fieldset:last-of-type label {
    justify-content: flex-start;
}

.button-row {
    display: flex;
    gap: 1rem;
}

.button-row button {
    flex: 1;
    padding: 0.75rem;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

button[type="submit"] {
    background-color: #7c4dff;
    color: #fff;
}

button[type="submit"]:hover {
    background-color: #651fff;
}

#randomize {
    background-color: #2d2d44;
    color: #e0e0e0;
}

#randomize:hover {
    background-color: #3d3d5c;
}

#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    display: none;
}

#modal-overlay.visible {
    display: flex;
}

#modal {
    background-color: #22223a;
    border: 1px solid #7c4dff;
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

#modal h2 {
    font-size: 1.2rem;
    font-weight: 400;
    color: #999;
}

#cr-value {
    color: #b388ff;
    font-size: 3.5rem;
    font-weight: 700;
}

#modal-close {
    margin-top: 0.5rem;
    padding: 0.5rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    background-color: #7c4dff;
    color: #fff;
    transition: background-color 0.2s;
}

#modal-close:hover {
    background-color: #651fff;
}

@media (max-width: 480px) {
    body {
        padding: 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    fieldset {
        padding: 1rem;
    }

    input[type="number"] {
        width: 65px;
    }
}