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

:root {
    /* Основная палитра */
    --dark-indigo: #1A1F4F;
    --main-gray: #2B2F44;
    --light-gray: #E6E8EF;
    --white: #FFFFFF;
    
    /* Акцентная палитра */
    --accent-blue: #2563EB;
    --accent-blue-hover: #1E40AF;
    --bright-yellow: #F59E0B;
    --emerald: #10B981;
    --red-brick: #EF4444;
    
    /* Фоны и границы */
    --bg-light: #F9FAFB;
    --bg-lighter: #F5F7FA;
    --bg-card: #F3F4F6;
    --border-color: #E5E7EB;
    --border-light: #E2E8F0;
    
    /* Текст */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    
    /* Темный режим */
    --dark-bg: #0B1020;
    --dark-frame: #1F2A44;
    --dark-text: #E5E7EB;
    --dark-text-secondary: #A3AAC3;
    
    /* Тени */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-lighter);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--dark-indigo);
    padding: 2rem 0;
    box-shadow: var(--shadow-md);
}

header h1 {
    font-size: 2.5rem;
    color: var(--white);
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--light-gray);
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* Main */
main {
    padding: 2.5rem 0;
}

/* Stats Banner */
.stats-banner {
    background: var(--white);
    padding: 1.5rem 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--accent-blue);
}

.stats-banner strong {
    color: var(--accent-blue);
    font-size: 1.5rem;
    font-weight: 700;
}

/* Generator Section */
.generator-section {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.generator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.input-panel h3, .preview-panel h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
}

.input-panel label {
    display: block;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    margin-top: 1.5rem;
    font-size: 0.875rem;
}

/* Form Elements */
input[type="text"], select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background: var(--white);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s ease;
    font-family: inherit;
}

input[type="text"]:focus, select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="text"]::placeholder {
    color: var(--text-light);
}

.design-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.control-group {
    margin-top: 1rem;
}

input[type="color"] {
    width: 100%;
    height: 55px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

input[type="color"]:hover {
    border-color: var(--accent-blue);
}

/* Buttons */
button, .btn-primary, .btn-success, .btn-secondary {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: var(--accent-blue);
    color: var(--white);
    width: 100%;
    margin-top: 2rem;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-blue-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-success {
    background: var(--emerald);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--light-gray);
    border-color: var(--accent-blue);
}

/* QR Preview */
.qr-preview-box {
    min-height: 400px;
    background: var(--bg-lighter);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    transition: all 0.3s ease;
}

.preview-placeholder {
    color: var(--text-light);
    font-size: 1rem;
    text-align: center;
}

.qr-preview-box img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* Result Actions */
.result-actions {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tracking-info {
    background: var(--bg-lighter);
    padding: 1.5rem;
    border-radius: 6px;
    border-left: 4px solid var(--accent-blue);
}

.tracking-info label {
    display: block;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.tracking-info input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    background: var(--white);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.stats-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.stats-link:hover {
    color: var(--accent-blue-hover);
    transform: translateX(3px);
}

/* Features Section */
.features {
    background: var(--white);
    padding: 3rem 2.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
}

.features h2 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 3rem;
    font-size: 2rem;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-lighter);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--white);
}

.feature-card .icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Use Cases Section */
.use-cases {
    background: var(--white);
    padding: 3rem 2.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
}

.use-cases h2 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 3rem;
    font-size: 2rem;
    font-weight: 700;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.use-case {
    background: var(--bg-lighter);
    padding: 1.5rem;
    border-radius: 6px;
    border-left: 4px solid var(--accent-blue);
    transition: all 0.3s ease;
}

.use-case:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    background: var(--white);
}

.use-case h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.use-case p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Analytics Section */
.analytics-section {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.stats-result {
    margin-top: 2rem;
}

.stats-card {
    background: var(--bg-lighter);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.stats-card h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    gap: 1rem;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    background: var(--white);
    border-radius: 6px;
    border: 1px solid var(--border-light);
}

.stat-item.highlight {
    background: var(--accent-blue);
    color: var(--white);
    border: none;
    font-size: 1.125rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-weight: 600;
    font-size: 0.9rem;
}

.scans-list {
    max-height: 400px;
    overflow-y: auto;
}

.scan-item {
    padding: 1rem 1.25rem;
    background: var(--white);
    border-radius: 6px;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    border-left: 3px solid var(--border-color);
    transition: all 0.2s ease;
}

.scan-item:hover {
    border-left-color: var(--accent-blue);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

/* Premium Banner */
.premium-banner {
    background: linear-gradient(135deg, var(--bright-yellow) 0%, #F97316 100%);
    padding: 2.5rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.premium-banner h4 {
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    color: var(--white);
    font-weight: 700;
}

.premium-banner p {
    color: var(--white);
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.btn-premium {
    background: var(--white);
    color: var(--bright-yellow);
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.btn-premium:hover {
    background: var(--bg-lighter);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Footer */
footer {
    background: var(--dark-indigo);
    padding: 2rem 0;
    text-align: center;
    margin-top: 3rem;
}

footer p {
    color: var(--light-gray);
}

footer a {
    color: var(--accent-blue);
    text-decoration: none;
    margin: 0 1rem;
    font-weight: 600;
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--bright-yellow);
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .generator-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .design-controls {
        grid-template-columns: 1fr;
    }
    
    .features-grid, .use-cases-grid {
        grid-template-columns: 1fr;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-lighter);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue-hover);
}

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

.effects-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.effects-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

h4 {
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.logo-upload {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.logo-name {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-style: italic;
}

.btn-remove {
    background: var(--red-brick);
    color: var(--white);
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-remove:hover {
    background: #dc2626;
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 6px;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
    animation: slideIn 0.3s ease;
    font-weight: 600;
    font-size: 0.9rem;
}

.notification.success {
    background: var(--emerald);
    color: var(--white);
}

.notification.error {
    background: var(--red-brick);
    color: var(--white);
}

@keyframes slideIn {
    from { transform: translateX(400px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(400px); opacity: 0; }
}