:root {
    --bg-dark: #0a0a0a;
    --card-bg: #141414;
    --accent-green: #00ff33;
    --accent-dark-green: #00881b;
    --text-white: #e0e0e0;
    --text-dim: #a0a0a0;
    --border: #333;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 1400px;
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 40px;
    border: 1px solid var(--border);
}

@media (max-width: 1000px) {
    .container {
        grid-template-columns: 1fr;
    }
}

h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--accent-green);
    letter-spacing: -1px;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 14px;
    color: var(--text-dim);
    font-weight: 500;
}

input[type="text"], 
select {
    background: #1f1f1f;
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: 10px;
    color: var(--text-white);
    font-size: 14px;
    transition: all 0.2s;
}

/* Color Picker Styling - Fixed "Dash" issue */
input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 100%;
    height: 45px;
    cursor: pointer;
    background: #1f1f1f;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 4px;
}

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

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 6px;
}

input[type="text"]:focus, select:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(0, 255, 51, 0.1);
}

/* Switch Toggle Styling */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #333;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-green);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--accent-green);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.file-upload {
    position: relative;
    background: #1f1f1f;
    border: 2px dashed var(--border);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s;
}

.file-upload:hover {
    border-color: var(--accent-green);
}

.file-upload input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.btn {
    background-color: var(--accent-green);
    color: #000;
    border: none;
    padding: 14px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
    margin-top: 10px;
}

.btn:hover {
    background-color: #00e62e;
}

.btn:active {
    transform: scale(0.98);
}

.preview-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    background: #000;
    border-radius: 15px;
    padding: 40px;
    min-height: 500px;
    border: 1px solid var(--border);
}

.qr-preview {
    width: 100%;
    max-width: 650px;
    aspect-ratio: 1/1;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 60px rgba(0, 255, 51, 0.05);
}

.qr-preview svg {
    width: 100%;
    height: 100%;
}

.status-badge {
    margin-top: 30px;
    padding: 10px 24px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.status-valid {
    background: rgba(0, 255, 51, 0.1);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}

.status-invalid {
    background: rgba(255, 68, 68, 0.1);
    color: #ff4444;
    border: 1px solid #ff4444;
}

.validation-report {
    margin-top: 30px;
    width: 100%;
    max-width: 400px;
    font-size: 14px;
    color: var(--text-dim);
}

.report-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #222;
}

.report-val {
    color: var(--text-white);
    font-weight: 500;
}