/* --- Root Variables for Easy Theming --- */
:root {
    --primary-color: #0073aa;
    --primary-hover: #005f8c;
    --secondary-color: #6c757d;
    --secondary-hover: #5a6268;
    --border-color: #e5e7eb;
    --background-color: #f9fafb;
    --card-background: #ffffff;
    --text-color: #1f2937;
    --muted-text: #6b7280;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* --- Main Container --- */
.qrcg-pro-container {
    max-width: 900px;
    margin: 2rem auto;
    font-family: var(--font-family);
    display: flex;
    flex-wrap: wrap;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

/* --- Options Panel (Left Side) --- */
.qrcg-pro-options {
    flex: 1;
    min-width: 340px;
    padding: 1.5rem 2rem;
    border-right: 1px solid var(--border-color);
    background: var(--card-background);
}
.qrcg-pro-title {
    margin-top: 0;
    margin-bottom: 2rem;
    color: var(--text-color);
    font-size: 1.75rem;
    font-weight: 700;
}
.qrcg-pro-group {
    margin-bottom: 1.5rem;
}
.qrcg-pro-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #374151;
    font-size: 0.9rem;
}
.qrcg-pro-input,
.qrcg-pro-select,
.qrcg-pro-input-color-text {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.qrcg-pro-input:focus,
.qrcg-pro-select:focus,
.qrcg-pro-input-color-text:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 115, 170, 0.2);
}

/* --- Accordion Styling --- */
.qrcg-pro-accordion {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}
.qrcg-pro-accordion summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    cursor: pointer;
    font-weight: 600;
    background-color: #f9fafb;
    list-style: none; /* Remove default marker */
}
.qrcg-pro-accordion summary::-webkit-details-marker { display: none; }
.qrcg-pro-accordion[open] > summary {
    border-bottom: 1px solid var(--border-color);
}
.accordion-content {
    padding: 1.5rem;
}
.accordion-icon::before {
    content: '+';
    font-size: 1.5rem;
    color: var(--muted-text);
    transition: transform 0.2s ease-in-out;
}
.qrcg-pro-accordion[open] .accordion-icon::before {
    transform: rotate(45deg);
}


/* --- Custom Controls --- */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.qrcg-pro-input-color {
    width: 48px;
    height: 48px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    padding: 4px;
    background-color: white;
}
.qrcg-pro-input-color-text {
    flex-grow: 1;
}

/* --- Logo Upload --- */
.visually-hidden { display: none; }
#logo-preview-container {
    position: relative;
    width: 100px;
    height: 100px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    padding: 5px;
    box-sizing: border-box;
}
#logo-preview {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
#remove-logo-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--text-color);
    color: white;
    border: none;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.qrcg-pro-btn-upload {
    width: 100%;
    padding: 0.75rem;
    background-color: #fff;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
}
.qrcg-pro-btn-upload:hover {
    background-color: var(--primary-color);
    color: #fff;
}

/* --- Preview Panel (Right Side) --- */
.qrcg-pro-preview {
    flex: 1;
    min-width: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: var(--background-color);
}
#qr-code-canvas, #qr-code-canvas canvas {
    border-radius: 8px;
}

/* --- Download Buttons --- */
.qrcg-pro-download-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}
.qrcg-pro-btn {
    flex: 1;
    padding: 0.8rem 1rem;
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}
.qrcg-pro-btn.primary { background-color: var(--primary-color); }
.qrcg-pro-btn.primary:hover { background-color: var(--primary-hover); }
.qrcg-pro-btn.secondary { background-color: var(--secondary-color); }
.qrcg-pro-btn.secondary:hover { background-color: var(--secondary-hover); }

/* --- Responsive Layout --- */
@media (max-width: 768px) {
    .qrcg-pro-container { flex-direction: column; }
    .qrcg-pro-options { border-right: none; border-bottom: 1px solid var(--border-color); }
}