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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

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

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    animation: fadeInDown 0.6s ease-out;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: fadeInUp 0.6s ease-out;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-group label {
    font-weight: 600;
    color: #555;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
}

.hint {
    display: block;
    margin-top: 5px;
    color: #10b981;
    font-size: 0.85rem;
    font-style: italic;
}

.icon {
    font-size: 1.3rem;
}

input[type="text"],
input[type="url"] {
    padding: 15px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1.05rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

input[type="text"]:focus,
input[type="url"]:focus {
    outline: none;
    border-color: #1e3a8a;
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.btn-generate {
    padding: 15px 30px;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: 100%;
    margin-top: 10px;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.btn-generate:active {
    transform: translateY(0);
}

.btn-download {
    padding: 15px 30px;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    color: white;
    width: 100%;
    margin-top: 20px;
    opacity: 0.5;
    pointer-events: none;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(30, 58, 138, 0.4);
}

.btn-download:active {
    transform: translateY(0);
}

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

.qr-container {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    position: relative;
    border: 3px solid #cbd5e1;
    box-shadow: 0 10px 30px rgba(30, 58, 138, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.qr-container h3 {
    margin-bottom: 25px;
    color: #1e3a8a;
    font-size: 1.3rem;
    font-weight: 700;
    width: 100%;
}

#qrcode {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 25px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(30, 58, 138, 0.15);
    width: 450px;
    height: 450px;
    max-width: 100%;
    overflow: hidden;
}

#qrcode canvas {
    display: block !important;
    margin: 0 auto !important;
    width: 400px !important;
    height: 400px !important;
    max-width: 100% !important;
    max-height: 100% !important;
    image-rendering: pixelated !important;
    image-rendering: -moz-crisp-edges !important;
    image-rendering: crisp-edges !important;
}

#qrcode img {
    display: none !important;
}

#logoOverlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 14px;
    color: #667eea;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    pointer-events: none;
    z-index: 10;
    display: none;
}

.download-section {
    text-align: center;
    margin-top: 20px;
}

footer {
    text-align: center;
    color: white;
    margin-top: 30px;
    opacity: 0.9;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* Responsive Design */
@media (max-width: 968px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    #qrcode {
        width: 100%;
        height: auto;
        aspect-ratio: 1 / 1;
        max-width: 450px;
    }
    
    #qrcode canvas {
        width: 100% !important;
        height: auto !important;
        max-width: 400px !important;
        aspect-ratio: 1 / 1 !important;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    main {
        padding: 20px;
    }
    
    .qr-container {
        padding: 20px;
    }
    
    #qrcode {
        padding: 15px;
        width: 100%;
        max-width: 350px;
    }
    
    #qrcode canvas {
        width: 100% !important;
        height: auto !important;
        max-width: 100% !important;
    }
}