.container {
    width: 90%;
    max-width: 960px;
    margin: 0 auto;
}

/* メインコンテンツ */
main {
    flex: 1;
    padding: 20px 0;
}

.container>h2 {
    font-size: 1.8em;
    margin-top: 0;
}

.modal-content h3,
.modal-content h4 {
    margin-top: 0;
}

.modal-content .form-group {
    display: flex;
    align-items: center;
}

.modal-content .form-group label {
    width: 120px;
    min-width: 120px;
    margin-right: 10px;
}

.modal-content .form-group input[type="range"] {
    flex-grow: 1;
}

.modal-content .form-group span {
    margin-left: 10px;
    width: 20px;
    text-align: right;
}

.form-group {
    margin-bottom: 15px;
}

#participants-container .item-input,
#items-container .item-input {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

#participants-container label,
#items-container label {
    width: 80px;
}

#items-container label,
#participants-container label {
    min-width: 80px;
    /* ラベルが縮まないように */
    margin-right: 10px;
}

input[type="number"],
input[type="text"] {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #2980b9;
}

/* あみだくじエリア */
#amida-wrapper {
    display: flex;
    box-sizing: border-box;
    flex-direction: column;
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
}

.points-container {
    display: flex;
    width: 100%;
    box-sizing: border-box;
    height: auto;
    min-height: 1.5em;
    position: relative;
}

#amida-canvas {
    cursor: pointer;
    background-color: #fafafa;
    border: 1px solid #eee;
    max-width: 100%;
    height: auto;
    display: block;
}

.amida-label {
    word-break: break-word;
    position: absolute;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

#result-display {
    text-align: center;
    font-size: 1.5em;
    margin-top: 20px;
    font-weight: bold;
    min-height: 1.5em;
    /* Prevent layout shift when text appears */
    word-break: break-word;
    /* Allow long names to wrap */
    color: #e74c3c;
}


/* Responsive Styles */
@media (max-width: 640px) {
    .container {
        width: 95%;
        padding: 10px 0;
    }

    .modal-content {
        margin: 20px auto;
        padding: 20px;
        width: 95%;
    }

    .container>h2 {
        font-size: 1.5em;
    }

    #result-display {
        font-size: 1.2em;
    }

    .modal-content .form-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .modal-content .form-group label {
        width: auto;
        min-width: 0;
    }

    #amida-wrapper {
        padding: 20px 5px;
    }

    .points-container .amida-label {
        font-size: 0.8em;
        /* スマートフォンではラベルの文字を小さくする */
    }

    #settings .item-input {
        flex-direction: column;
        align-items: flex-start;
    }

    #settings .item-input label {
        width: auto;
        margin-bottom: 5px;
    }
}