:root {
    --bg-main: #1e1e2e;
    --bg-card: #252536;
    --bg-input: #2f2f42;
    --primary: #10b981;
    /* Emerald */
    --primary-hover: #059669;
    --text-main: #ffffff;
    --text-muted: #94a3b8;
    --border: #3f3f50;
    --radius: 12px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, #10b981 0%, #064e3b 100%);
    padding: 2rem 0;
    color: white;
    text-align: center;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.2);
    margin-bottom: 2rem;
}

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.header-logo {
    height: 50px;
    width: auto;
    border-radius: 8px;
    /* Optional: smooth corners */
}

.brand-text {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.brand h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0;
    line-height: 1;
}

.badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    align-self: flex-start;
    margin-top: 0.5rem;
}

/* Layout */
.generator-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
}

@media (max-width: 900px) {
    .generator-layout {
        grid-template-columns: 1fr;
    }
}

/* Controls Panel */
.controls-panel {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 2rem;
    box-shadow: var(--shadow);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    background: var(--bg-input);
    padding: 0.5rem;
    border-radius: var(--radius);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.8rem 1rem;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.tab-btn:hover:not(.active) {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

/* Inputs */
.input-group {
    display: none;
    animation: fadeIn 0.3s ease;
}

.input-group.active {
    display: block;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 1rem;
}

label:first-child {
    margin-top: 0;
}

input,
textarea,
select {
    width: 100%;
    padding: 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    transition: border-color 0.2s;
    appearance: none;
    /* Remove default arrow */
}

/* Custom Select Arrow */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.2rem;
    padding-right: 2.5rem;
    cursor: pointer;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
}

small {
    display: block;
    margin-top: 0.5rem;
    background: var(--bg-input);
    color: var(--text-muted);
}

/* Customization Section */
.customization {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.customization h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-input);
    padding: 0.4rem;
    /* Tighter padding for cleaner look */
    border-radius: 8px;
    border: 1px solid var(--border);
    position: relative;
    cursor: pointer;
    overflow: hidden;
    height: 54px;
    /* Fixed height to match inputs */
}

.color-picker-wrapper:hover {
    border-color: var(--text-muted);
}

.color-value {
    font-family: monospace;
    font-size: 1rem;
    color: var(--text-main);
    margin-left: 3.5rem;
    /* Space for the color swatch */
    pointer-events: none;
    z-index: 1;
}

input[type="color"] {
    position: absolute;
    left: 0.4rem;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 6px;
    /* Slightly rounded swatch */
    cursor: pointer;
    background: none;
    z-index: 2;
}

/* Color swatch specific overrides */
input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.presets {
    display: flex;
    gap: 0.5rem;
}

.color-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid var(--border);
    cursor: pointer;
    transition: transform 0.2s;
}

.color-btn:hover {
    transform: scale(1.1);
    border-color: white;
}

/* Styled File Upload */
.file-upload-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-input-hidden {
    display: none;
}

.file-upload-btn {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    transition: all 0.2s;
}

.file-upload-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(16, 185, 129, 0.05);
}

.file-name {
    color: var(--text-muted);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}

/* Preview Panel */
.preview-card {
    background: white;
    /* QR needs contrast likely, but we can style the container dark and keep the QR on white/transp card if needed. Actually let's make the card white or dark with white bg for QR. Let's stick to a clean card.*/
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    position: sticky;
    top: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.status-dot {
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary);
}

.qr-canvas-wrapper {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    display: inline-block;
    margin-bottom: 2rem;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.05);
}

.actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.2s;
}

.primary-btn:hover {
    background: var(--primary-hover);
}

#download-format {
    width: auto;
    background: var(--bg-input);
}

/* Footer */
footer {
    margin-top: auto;
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}

.socials {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.socials a {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: color 0.2s;
}

.socials a:hover {
    color: var(--primary);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}