.qr-page {
    max-width: 1180px;
    margin: 0 auto;
}

.qr-generator-card {
    padding: 24px;
}

.qr-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    gap: 24px;
    align-items: start;
}

.qr-form-area,
.qr-preview-area {
    min-width: 0;
}

/* 탭 */
.qr-type-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.qr-type-btn {
    border: 1px solid #dbe1ea;
    background: #f8fafc;
    color: #475569;
    border-radius: 999px;
    padding: 9px 16px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.18s ease;
}

.qr-type-btn:hover {
    background: #eef2ff;
    border-color: #c7d2fe;
    color: #4338ca;
}

.qr-type-btn.active {
    background: #0f172a;
    border-color: #0f172a;
    color: #fff;
}

/* 입력 영역 */
.qr-form-panel {
    display: none;
}

.qr-form-panel.active {
    display: block;
}

.qr-form-panel .utility-field-label {
    margin-top: 16px;
}

.qr-form-panel .utility-field-label:first-child {
    margin-top: 0;
}

.qr-textarea {
    min-height: 150px;
    resize: vertical;
    line-height: 1.65;
}

.qr-option-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 22px;
}

/* 버튼 영역 */
.utility-btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.utility-btn-row .utility-btn {
    min-width: 118px;
    height: 46px;
    padding: 0 18px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: none;
    transition: 0.18s ease;
}

.utility-btn-row .utility-btn:hover {
    transform: translateY(-1px);
}

.utility-btn-primary {
    background: #0f172a;
    border-color: #0f172a;
    color: #fff;
    box-shadow: none;
}

.utility-btn-primary:hover {
    background: #111827;
    border-color: #111827;
}

#downloadQrBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* 메시지 */
.qr-message {
    min-height: 22px;
    margin-top: 14px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.5;
    color: #475569;
}

.qr-message.is-error {
    color: #dc2626;
}

.qr-message.is-success {
    color: #2563eb;
}

/* 미리보기 */
.qr-preview-area {
    position: sticky;
    top: 90px;
}

.qr-preview-box {
    border: 1px solid #e5e7eb;
    border-radius: 22px;
    background: #ffffff;
    min-height: 324px;
    padding: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#qrPreview {
    width: 100%;
    min-height: 246px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#qrPreview canvas,
#qrPreview img {
    max-width: 100%;
    height: auto;
    background: #ffffff;
    border-radius: 16px;
    padding: 10px;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

.qr-preview-empty {
    border: 1px dashed #cbd5e1;
    border-radius: 18px;
    color: #94a3b8;
    font-size: 13px;
    font-weight: 600;
    background: #fff;
}

/* 안내 박스 */
.qr-preview-info {
    margin-top: 14px;
    padding: 16px 18px;
    border-radius: 18px;
    background: #f8fafc;
    border: 1px solid #e5e7eb;
}

.qr-preview-info strong {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #111827;
}

.qr-preview-info p {
    margin: 0;
    font-size: 13px;
    line-height: 1.65;
    color: #64748b;
}

/* 도움말 */
.help-panel {
    margin-top: 32px;
}

.help-panel h2 {
    margin-bottom: 18px;
}

.help-panel .help-box + .help-box {
    margin-top: 18px;
}

/* 반응형 */
@media (max-width: 960px) {
    .qr-generator-card {
        padding: 22px;
    }

    .qr-layout {
        grid-template-columns: 1fr;
    }

    .qr-preview-area {
        position: static;
    }

    .qr-preview-box {
        min-height: 280px;
    }
}

@media (max-width: 640px) {
    .qr-generator-card {
        padding: 18px;
    }

    .qr-option-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .qr-type-btn {
        flex: 1 1 calc(50% - 8px);
        text-align: center;
    }

    .utility-btn-row {
        flex-direction: column;
        gap: 10px;
    }

    .utility-btn-row .utility-btn {
        width: 100%;
        min-width: 100%;
        height: 44px;
    }

    .qr-preview-box {
        padding: 18px;
        border-radius: 20px;
    }

    #qrPreview canvas,
    #qrPreview img {
        padding: 8px;
    }
}