/* =====================================================
   QR CODE GENERATOR - Professional Styles
   ===================================================== */

/* Container */
.qr-generator-container {
    background: #f7f8fa;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    text-align: left;
}

/* Typography - Einheitliche Schriftgrößen */
.qr-generator-container h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.5rem;
}

.qr-generator-container h6 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #495057;
    margin-bottom: 1rem;
}

.qr-generator-container p.fw-semibold {
    font-size: 0.9rem;
    color: #495057;
}

.qr-generator-container small {
    font-size: 0.8rem;
    color: #6c757d;
}

/* =====================================================
   Tab Navigation (Apple-Stil Pills)
   ===================================================== */
.qr-generator-container .nav-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    border-bottom: none;
    padding-bottom: 0.75rem;
    justify-content: flex-start;
}

.qr-generator-container .nav-tabs .nav-item {
    margin-bottom: 0.25rem;
}

.qr-generator-container .nav-tabs .nav-link {
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: #495057;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.qr-generator-container .nav-tabs .nav-link:hover {
    background: #f8f9fa;
    border-color: #adb5bd;
    color: #212529;
}

.qr-generator-container .nav-tabs .nav-link.active {
    background: #212529 !important;
    color: #fff !important;
    border-color: #212529 !important;
}

.qr-generator-container .nav-tabs .nav-link i {
    margin-right: 0.35rem;
}

/* =====================================================
   Tab Content Area
   ===================================================== */
.qr-generator-container .tab-content {
    background: #fff;
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid #dee2e6;
    min-height: 180px;
}

/* =====================================================
   Form Elements
   ===================================================== */
.qr-generator-container .form-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: #495057;
    margin-bottom: 0.5rem;
    display: block;
}

.qr-generator-container .form-control,
.qr-generator-container .form-select {
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    border: 1px solid #dee2e6;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.qr-generator-container .form-control:focus,
.qr-generator-container .form-select:focus {
    border-color: #212529;
    box-shadow: 0 0 0 3px rgba(33, 37, 41, 0.1);
    outline: none;
}

.qr-generator-container .form-control::placeholder {
    color: #adb5bd;
}

/* =====================================================
   Frame Selection
   ===================================================== */
.frames-preview {
    gap: 0.5rem;
}

.frames-preview img {
    width: 52px;
    height: 52px;
    object-fit: contain;
    margin: 0.25rem;
    cursor: pointer;
    border-radius: 8px;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    background: #fff;
    padding: 4px;
}

.frames-preview img:hover {
    transform: scale(1.1);
    border-color: #adb5bd;
}

.frames-preview img.selected-frame {
    border: 2px solid #212529;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* =====================================================
   Color Picker
   ===================================================== */
.color-picker-wrapper label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-picker-wrapper input[type="color"] {
    width: 40px;
    height: 40px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    cursor: pointer;
    padding: 2px;
    transition: border-color 0.2s;
}

.color-picker-wrapper input[type="color"]:hover {
    border-color: #212529;
}

/* =====================================================
   Calendar Placeholder
   ===================================================== */
.calendar-placeholder {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: #adb5bd;
    font-size: 0.9rem;
}

/* =====================================================
   QR Preview Area
   ===================================================== */
.qr-preview {
    margin-top: 0.5rem;
    text-align: center;
}

#qrcodePreviewDesign {
    background: #f8f9fa;
    border-radius: 12px;
    border: 2px dashed #dee2e6;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

#qrcodePreviewDesign canvas {
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

#qrcodePreviewDesign img {
    border-radius: 8px;
}

/* =====================================================
   Buttons
   ===================================================== */

/* Generate Button */
.btn-generate {
    font-size: 1.25rem !important;
    font-weight: 600 !important;
    padding: 0.9rem 2rem !important;
    border-radius: 10px !important;
    transition: all 0.2s ease !important;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(33, 37, 41, 0.25);
}

/* Size & Error Level Buttons */
.qr-generator-container .btn-group {
    border-radius: 8px;
    overflow: hidden;
}

.qr-generator-container .btn-group .btn {
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-color: #dee2e6;
}

.size-btn.active,
.error-btn.active {
    background-color: #212529 !important;
    color: #fff !important;
    border-color: #212529 !important;
}

.size-btn:hover:not(.active),
.error-btn:hover:not(.active) {
    background-color: #f8f9fa;
    color: #212529;
}

/* Download & Copy Buttons */
.btn-download {
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.btn-download:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(25, 135, 84, 0.3);
}

.btn-copy {
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.btn-copy:hover {
    background-color: #212529;
    color: #fff;
}

/* Options Panel */
.qr-generator-container .col-lg-4 .border {
    border-radius: 12px !important;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

/* =====================================================
   Horizontal Rule
   ===================================================== */
.qr-generator-container hr {
    border-color: #dee2e6;
    opacity: 0.5;
    margin: 0.75rem 0;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

/* Tablet (< 992px) */
@media (max-width: 991px) {
    .qr-generator-container .col-lg-4 {
        margin-top: 2rem;
    }
    
    .qr-generator-container .col-lg-8 {
        padding-right: 0;
    }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
    .qr-generator-container {
        padding: 1.25rem;
        border-radius: 10px;
    }
    
    .qr-generator-container .tab-content {
        padding: 1.25rem;
    }

    /* Tabs kompakter */
    .qr-generator-container .nav-tabs .nav-link {
        font-size: 0.8rem;
        padding: 0.45rem 0.7rem;
    }
    
    .qr-generator-container .nav-tabs .nav-link i {
        font-size: 0.95rem;
    }

    /* Touch-optimierte Inputs (min 44px) */
    .qr-generator-container .form-control,
    .qr-generator-container .form-select {
        font-size: 1rem;
        padding: 0.7rem 0.85rem;
        min-height: 48px;
    }

    /* Generate Button */
    .btn-generate {
        font-size: 1.1rem !important;
        padding: 0.85rem 1.5rem !important;
        width: 100%;
    }
    
    /* Button Groups */
    .qr-generator-container .btn-group .btn {
        padding: 0.55rem 0.5rem;
        font-size: 0.8rem;
        min-height: 44px;
    }
    
    /* Frames */
    .frames-preview img {
        width: 46px;
        height: 46px;
    }
    
    /* Color Picker Touch-optimiert */
    .color-picker-wrapper input[type="color"] {
        width: 48px;
        height: 48px;
    }
    
    /* Preview */
    #qrcodePreviewDesign {
        min-height: 200px;
    }
    
    /* Action Buttons */
    .btn-download,
    .btn-copy {
        padding: 0.8rem 1rem !important;
        font-size: 1rem !important;
    }
    
    /* Typography */
    .qr-generator-container h5 {
        font-size: 1.05rem;
    }
    
    .qr-generator-container h6 {
        font-size: 0.9rem;
    }
}

/* Small Mobile (< 480px) */
@media (max-width: 480px) {
    .qr-generator-container {
        padding: 1rem;
    }
    
    .qr-generator-container .tab-content {
        padding: 1rem;
    }

    /* Tabs: Icon oben, Text unten */
    .qr-generator-container .nav-tabs .nav-link {
        font-size: 0.7rem;
        padding: 0.4rem 0.55rem;
        text-align: center;
    }
    
    .qr-generator-container .nav-tabs .nav-link i {
        display: block;
        margin-right: 0;
        margin-bottom: 3px;
        font-size: 1rem;
    }
    
    /* Button Groups vertikal */
    .qr-generator-container .btn-group {
        flex-direction: column;
    }
    
    .qr-generator-container .btn-group .btn {
        border-radius: 6px !important;
        margin-bottom: 6px;
        width: 100%;
    }
    
    .qr-generator-container .btn-group .btn:last-child {
        margin-bottom: 0;
    }
    
    /* Frames kleiner */
    .frames-preview img {
        width: 42px;
        height: 42px;
    }
    
    /* Typography */
    .qr-generator-container h5 {
        font-size: 1rem;
    }
    
    .qr-generator-container p.fw-semibold {
        font-size: 0.85rem;
    }
    
    /* Labels */
    .qr-generator-container .form-label {
        font-size: 0.85rem;
    }
}