/* Modern QR Code Generator Styles */

* {
    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;
    color: #333;
    line-height: 1.6;
}

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

/* Header Styles */
header {
    margin-bottom: 30px;
    padding: 30px 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-text {
    text-align: left;
}

.header-text h1 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.header-text p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    gap: 8px;
}

.lang-btn {
    padding: 8px 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.lang-btn.active {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
}

/* Input Section */
.input-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Tab Buttons */
.tab-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 25px;
}

.tab-btn {
    padding: 12px 8px;
    border: none;
    background: #f8f9fa;
    color: #666;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.tab-btn:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Form Elements */
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

input, textarea, select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    margin-bottom: 20px;
    transition: all 0.3s ease;
    background: #fff;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

textarea {
    min-height: 80px;
    resize: vertical;
}

/* Options */
.options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

.option-group label {
    margin-bottom: 5px;
}

/* Generate Button */
.generate-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

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

/* Output Section */
.output-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

/* QR Container */
.qr-container {
    margin-bottom: 25px;
    position: relative;
}

#qr-placeholder {
    background: #f8f9fa;
    border: 3px dashed #dee2e6;
    border-radius: 15px;
    padding: 60px 20px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-content {
    text-align: center;
}

.qr-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: 20px;
}

.placeholder-content h3 {
    color: #666;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.placeholder-content p {
    color: #999;
    font-size: 0.95rem;
}

#qr-canvas {
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 100%;
    height: auto;
}

/* Download Section */
.download-section {
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

.download-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.4);
    margin-bottom: 10px;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.6);
}

.download-info {
    color: #666;
    font-size: 0.9rem;
}

/* Footer */
footer {
    margin-top: 50px;
    text-align: center;
    padding: 30px 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-content p {
    color: white;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.social-links a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .tab-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .options {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .header-text {
        text-align: center;
    }
    
    .header-text h1 {
        font-size: 2rem;
    }
    
    .input-section, .output-section {
        padding: 20px;
    }
    
    .social-links {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .tab-btn {
        font-size: 0.8rem;
        padding: 10px 6px;
    }
    
    header {
        padding: 20px 0;
    }
    
    .header-text h1 {
        font-size: 1.8rem;
    }
    
    .language-switcher {
        flex-direction: row;
        justify-content: center;
    }
    
    .lang-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
}

/* Animation Classes */
.pulse {
    animation: pulse 2s infinite;
}

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

.shake {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Success Animation */
.success-flash {
    animation: successFlash 0.6s ease;
}

@keyframes successFlash {
    0% { background-color: rgba(40, 167, 69, 0); }
    50% { background-color: rgba(40, 167, 69, 0.2); }
    100% { background-color: rgba(40, 167, 69, 0); }
}