.support-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: none;
    z-index: 9999;
}

.support-modal {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(360px, calc(100vw - 24px));
    max-height: 50vh;
    overflow: auto;
    background: rgba(20, 20, 28, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 14px;
    color: #fff;
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.45);
    padding: 14px;
    box-sizing: border-box;
    color-scheme: dark;
}

.support-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 6px;
    padding: 10px 12px;
    margin-left: -14px;
    margin-right: -14px;
    margin-top: -14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
    background: rgba(255, 255, 255, 0.06);
    cursor: move;
    cursor: grab;
    user-select: none;
}

.support-modal-header:active {
    cursor: grabbing;
}

.support-modal-header h2 {
    margin: 0;
    font-size: 18px;
}

.support-modal-header .support-close {
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(0, 0, 0, 0.25);
    color: #fff;
    border-radius: 10px;
    width: 36px;
    height: 32px;
    padding: 0;
    cursor: pointer;
}

.support-modal-header .support-close:hover {
    background: rgba(255, 255, 255, 0.12);
}

.support-form {
    display: grid;
    /* PC/共通: 左列(日付)を少し広め、右列(ルート/便名)を少し狭める */
    grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
    gap: 8px 8px;
    margin-top: 10px;
}

.support-field {
    display: grid;
    /* 分割ラインを少し左へ */
    grid-template-columns: 2.8em minmax(0, 1fr);
    column-gap: 3px;
    row-gap: 0;
    align-items: center;
}

.support-field.span-2 {
    grid-column: 1 / -1;
}

.support-field label {
    color: #ccc;
    font-size: 12px;
    white-space: nowrap;
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
}

.support-field label::after {
    content: '：';
}

.support-field input[type="text"],
.support-field select,
.support-field textarea {
    min-width: 0;
}

.support-airline-wrap {
    position: relative;
    width: 100%;
}

.support-airline-wrap #support-airline-display {
    padding-right: 30px;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%2716%27%20height%3D%2716%27%20viewBox%3D%270%200%2024%2024%27%20fill%3D%27none%27%20stroke%3D%27white%27%20stroke-width%3D%272%27%20stroke-linecap%3D%27round%27%20stroke-linejoin%3D%27round%27%3E%3Cpolyline%20points%3D%276%209%2012%2015%2018%209%27%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 14px 14px;
}

.support-airline-wrap select {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.001;
    cursor: pointer;
}

.support-field textarea,
.support-field select {
    align-self: start;
}

.support-modal .support-note {
    color: #bbb;
    font-size: 13px;
    line-height: 1.4;
    margin: 10px 0 8px 0;
}

.support-modal input[type="text"],
.support-modal select,
.support-modal textarea {
    width: 100%;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
    padding: 6px 8px;
    box-sizing: border-box;
}

.support-modal select {
    color-scheme: dark;
}

.support-modal select option {
    background: rgba(20, 20, 28, 0.98);
    color: #fff;
}

.support-modal select.support-select {
    width: 100%;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
    padding: 6px 8px;
    box-sizing: border-box;
}

.support-date-wrap {
    position: relative;
    width: 100%;
}

.support-date-wrap #support-flight-date-display {
    padding-right: 30px;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%2716%27%20height%3D%2716%27%20viewBox%3D%270%200%2024%2024%27%20fill%3D%27none%27%20stroke%3D%27white%27%20stroke-width%3D%272%27%20stroke-linecap%3D%27round%27%20stroke-linejoin%3D%27round%27%3E%3Crect%20x%3D%273%27%20y%3D%274%27%20width%3D%2718%27%20height%3D%2718%27%20rx%3D%272%27%20ry%3D%272%27%2F%3E%3Cline%20x1%3D%278%27%20y1%3D%272%27%20x2%3D%278%27%20y2%3D%276%27%2F%3E%3Cline%20x1%3D%2716%27%20y1%3D%272%27%20x2%3D%2716%27%20y2%3D%276%27%2F%3E%3Cline%20x1%3D%273%27%20y1%3D%2710%27%20x2%3D%2721%27%20y2%3D%2710%27%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 16px 16px;
}

.support-date-wrap input[type="date"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.001;
    cursor: pointer;
}

.support-modal input[readonly] {
    color: #ddd;
}

.support-modal textarea {
    height: 2.6em;
    min-height: 2.6em;
    resize: vertical;
}

.support-modal .support-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 8px;
}

.support-modal .support-actions button {
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 9px 12px;
    cursor: pointer;
}

.support-modal .btn-cancel {
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
}

.support-modal .btn-submit {
    background: #007bff;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.0);
    min-width: 120px;
}

.support-modal .btn-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (max-width: 520px) {
    .support-modal-backdrop {
        background: rgba(0, 0, 0, 0.25);
    }

    .support-modal {
        width: calc(100vw - 16px);
        max-height: 50vh;
        padding: 10px;
        top: 18%;
        transform: translate(-50%, 0);
    }

    .support-modal-header {
        margin-left: -10px;
        margin-right: -10px;
        margin-top: -10px;
        padding: 6px 8px;
    }

    .support-modal-header h2 {
        font-size: 14px;
    }

    .support-modal-header .support-close {
        width: 32px;
        height: 28px;
        border-radius: 8px;
    }

    .support-form {
        /* モバイル: 右列(ルート/便名)を少し狭め、左列(日付)を少し広めに */
        grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
        gap: 8px;
    }

    .support-field label {
        font-size: 11px;
    }

    .support-field {
        /* ラベル幅を少し縮めて、入力側の幅を確保 */
        grid-template-columns: 2.4em minmax(0, 1fr);
        column-gap: 3px;
    }

    .support-modal input[type="text"],
    .support-modal select,
    .support-modal textarea {
        padding-left: 6px;
        padding-right: 6px;
    }


    /* モバイル: 日付が切れないように少し詰める */
    .support-date-wrap #support-flight-date-display {
        font-size: 0.95em;
        padding-right: 26px;
        background-position: right 6px center;
    }

    .support-modal .support-note {
        font-size: 12px;
        line-height: 1.35;
    }
}