/* ── responsive ── */

@media (max-width: 700px) {
    .settings {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 540px) {
    .app {
        padding: 24px 16px 28px;
        border-radius: 16px;
    }

    .app-header h1 {
        font-size: 22px;
    }

    .app-header h1 span {
        font-size: 14px;
        display: block;
        margin-left: 0;
        margin-top: 2px;
    }

    .bg-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .bg-controls .color-picker-wrap {
        min-width: auto;
    }

    .bg-controls .quick-buttons {
        justify-content: center;
    }

    .platform-selector {
        gap: 8px 16px;
    }

    .platform-selector .label-group {
        font-size: 14px;
        padding: 2px 8px 2px 4px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
        flex: 1 1 100%;
        min-width: 80px;
    }

    .controls {
        flex-direction: column;
    }

    .preview-area {
        padding: 14px 16px;
        gap: 12px;
    }

    .preview-area .preview-img-wrap {
        width: 50px;
        height: 50px;
    }

    .drop-zone {
        padding: 30px 16px 26px;
    }

    .drop-zone .drop-title {
        font-size: 15px;
    }
}

@media (max-width: 400px) {
    .platform-selector .label-group {
        font-size: 13px;
    }

    .platform-selector .label-group .count-badge {
        font-size: 10px;
        padding: 0 6px;
    }

    .bg-controls .color-hex {
        font-size: 12px;
        min-width: 60px;
    }
}