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

:root {
    --primary: #00D9FF;
    --primary-dark: #00B8D4;
    --secondary: #A855F7;
    --accent: #FF6B35;
    --text-dark: #ffffff;
    --text-gray: #b4b4b4;
    --text-light: #808080;
    --bg-dark: #0a0a0f;
    --bg-card: #1a1a2e;
    --bg-glass: rgba(26, 26, 46, 0.7);
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 217, 255, 0.15);
    --shadow-lg: 0 20px 60px rgba(168, 85, 247, 0.3);
    --gradient-primary: linear-gradient(135deg, #00D9FF 0%, #A855F7 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-dark);
    background: var(--bg-dark);
    background-image: 
        radial-gradient(at 0% 0%, rgba(0, 217, 255, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
}

.generator-container {
    display: grid;
    grid-template-columns: 1fr 500px;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px;
    min-height: 100vh;
}

/* Header */
.generator-header {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.back-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    color: var(--text-gray);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    text-decoration: none;
}

.back-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(0, 217, 255, 0.1);
}

.generator-title h1 {
    font-size: 28px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.generator-title p {
    color: var(--text-gray);
    font-size: 14px;
    margin-top: 5px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

.btn-save {
    padding: 12px 24px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-save:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 217, 255, 0.5);
}

/* Form Section */
.form-section {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-gray);
    font-size: 14px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-dark);
    font-size: 15px;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 5px;
}

.btn-generate {
    width: 100%;
    padding: 16px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 217, 255, 0.5);
}

/* Preview Section */
.preview-section {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
    position: sticky;
    top: 30px;
    height: fit-content;
}

.preview-section h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.qr-preview {
    background: white;
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    margin-bottom: 20px;
}

#qrCanvas {
    max-width: 100%;
    height: auto;
}

.qr-info {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
}

.qr-info-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.qr-info-item:last-child {
    border-bottom: none;
}

.qr-info-label {
    color: var(--text-gray);
    font-size: 13px;
}

.qr-info-value {
    color: var(--text-dark);
    font-size: 13px;
    font-weight: 600;
}

.export-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.btn-export {
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-dark);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-export:hover {
    border-color: var(--primary);
    background: rgba(0, 217, 255, 0.1);
    transform: translateY(-2px);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-gray);
}

.empty-state i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

@media (max-width: 1024px) {
    .generator-container {
        grid-template-columns: 1fr;
    }
    
    .preview-section {
        position: relative;
        top: 0;
    }
}