:root {
    --primary-color: #6A11CB;
    --secondary-color: #2575FC;
    --bg-gradient: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--bg-gradient);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);
    background-color: #1a1a2e; /* Dark fallback */
    color: #ffffff;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.app-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
    background: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: #cbd5e1;
    font-size: 1rem;
}

/* Glassmorphism Panel */
.glass-panel {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex: 1;
    display: grid;
    grid-template-columns: 400px 1fr;
    overflow: hidden;
}

@media (max-width: 768px) {
    .glass-panel {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }
}

.controls-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
    overflow-y: auto;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
}

.category-section {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.category-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #4facfe;
    margin: 0 0 0.5rem 0;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.flex-row {
    display: flex;
    gap: 1rem;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: #e2e8f0;
}

/* Dropzone Logo */
.dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 1.2rem;
    text-align: center;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    color: #cbd5e1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.dropzone:hover, .dropzone.dragover {
    background: rgba(79, 172, 254, 0.1);
    border-color: #4facfe;
    color: #ffffff;
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

input[type="text"], select {
    padding: 0.8rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: white;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

input[type="text"]::placeholder {
    color: #94a3b8;
}

input[type="text"]:focus, select:focus {
    border-color: #4facfe;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.2);
}

select option {
    background: #1a1a2e;
    color: white;
}

/* Color Picker Customization */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.color-picker-wrapper.disabled {
    opacity: 0.4;
    filter: grayscale(100%);
    pointer-events: none;
    background: rgba(0, 0, 0, 0.2);
}

input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(255,255,255,0.2);
}

.color-value {
    font-family: monospace;
    font-size: 1rem;
    color: #e2e8f0;
}

/* Button */
.primary-btn {
    margin-top: 1rem;
    padding: 1rem;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: #000;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79, 172, 254, 0.4);
}

.primary-btn:active {
    transform: translateY(0);
}

/* Preview Section */
.preview-section {
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    padding: 2rem;
    border: 1px dashed rgba(255, 255, 255, 0.3);
}

.qr-container {
    background: #ffffff;
    padding: 0; /* Contrôlé entierement par le slider JS */
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.1s ease-out, border-radius 0.2s ease, padding 0.2s ease;
    cursor: grab;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.qr-container:active {
    cursor: grabbing;
}

/* Forcer le SVG en block pour supprimer le gap baseline inline */
#qr-code svg {
    display: block;
}

/* Custom CSS to make sure canvas from library is responsive */
#qr-code canvas {
    max-width: 100%;
    height: auto !important;
    display: block;
}

/* Custom Toggle Switch */
.toggle-container {
    margin-top: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.15);
    transition: .3s;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: .3s cubic-bezier(0.4, 0.0, 0.2, 1);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: #4facfe;
    border-color: #4facfe;
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.9rem;
    cursor: pointer;
    color: #e2e8f0;
    user-select: none;
}