/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Language Selector */
.language-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.language-selector select {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 20px;
    padding: 8px 15px;
    font-size: 14px;
    color: #333;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.language-selector select:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header-top {
    margin-bottom: 20px;
}

.store-link {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.store-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Test Container */
.test-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    flex: 1;
    position: relative;
}

/* Screen Styles */
.screen {
    display: none;
    padding: 40px;
    min-height: 500px;
    animation: fadeIn 0.5s ease-in-out;
}

.screen.active {
    display: block;
}

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

/* Welcome Screen */
.welcome-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.test-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.welcome-content h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 20px;
    font-weight: 600;
}

.welcome-content p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #666;
    font-size: 0.9rem;
}

.feature-icon {
    font-size: 1.2rem;
}

.start-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* Welcome CTA */
.welcome-cta {
    margin-top: 30px;
    padding: 20px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 15px;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.welcome-cta p {
    color: #666;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.welcome-store-btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    padding: 10px 25px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

.welcome-store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.5);
}

/* Question Screen */
.progress-bar {
    width: 100%;
    height: 6px;
    background: #f0f0f0;
    border-radius: 3px;
    margin-bottom: 20px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 3px;
    transition: width 0.3s ease;
    width: 0%;
}

.question-counter {
    text-align: center;
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.question-text {
    font-size: 1.4rem;
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 500;
    line-height: 1.6;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.option {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 15px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    font-size: 1rem;
    color: #333;
}

.option:hover {
    border-color: #667eea;
    background: #f0f2ff;
    transform: translateY(-2px);
}

.option.selected {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.next-btn {
    background: #6c757d;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    display: block;
    margin: 0 auto;
}

.next-btn:enabled {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.next-btn:enabled:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* Question CTA */
.question-cta {
    text-align: center;
    margin-top: 20px;
    padding: 15px;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 10px;
}

.question-store-link {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.question-store-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

/* Result Screen */
.result-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.result-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.result-title {
    font-size: 2rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.result-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.8;
}

.result-details {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    text-align: left;
}

.result-details h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
}

.result-details ul {
    list-style: none;
    padding: 0;
}

.result-details li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.result-details li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

.result-details p {
    color: #666;
    line-height: 1.6;
}

/* Share Section */
.share-section {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
}

.share-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.2rem;
    font-weight: 600;
}

.share-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.share-btn {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    padding: 10px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.share-btn.facebook:hover {
    border-color: #1877f2;
    color: #1877f2;
}

.share-btn.twitter:hover {
    border-color: #1da1f2;
    color: #1da1f2;
}

.share-btn.wechat:hover {
    border-color: #07c160;
    color: #07c160;
}

.share-btn.copy:hover {
    border-color: #667eea;
    color: #667eea;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
}

.cta-section h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
}

.cta-section p {
    margin-bottom: 20px;
    opacity: 0.9;
    line-height: 1.6;
}

.cta-btn {
    display: inline-block;
    background: white;
    color: #667eea;
    text-decoration: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.retake-btn {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.retake-btn:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Result Footer */
.result-footer {
    margin-top: 30px;
    padding: 20px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 15px;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.result-footer p {
    color: #666;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.result-store-btn {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.result-store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .screen {
        padding: 25px;
    }
    
    .features {
        flex-direction: column;
        gap: 15px;
    }
    
    .share-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .share-btn {
        width: 200px;
        justify-content: center;
    }
    
    .language-selector {
        top: 15px;
        right: 15px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .question-text {
        font-size: 1.2rem;
    }
    
    .option {
        padding: 15px;
        font-size: 0.9rem;
    }
    
    .result-title {
        font-size: 1.6rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
button:focus,
.option:focus,
select:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .option {
        border-width: 3px;
    }
    
    .option.selected {
        border-width: 4px;
    }
}