/* style.css */
* {
    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;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    color: #333;
    font-size: 2.5em;
    margin-bottom: 5px;
}

header p {
    color: #666;
    font-size: 1.1em;
}

.main-nav {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    border-bottom: 2px solid #eee;
    padding-bottom: 15px;
}

.nav-btn {
    padding: 12px 25px;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    cursor: pointer;
    background: #f0f0f0;
    color: #666;
    transition: all 0.3s;
}

.nav-btn.active {
    background: #667eea;
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.section {
    animation: fadeIn 0.5s ease;
}

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

.card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border: 1px solid #f0f0f0;
}

.card h2 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.5em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.question-box {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.question-text {
    font-size: 1.1em;
    line-height: 1.6;
    color: #333;
    margin-bottom: 15px;
}

.question-meta {
    display: flex;
    gap: 15px;
}

.badge {
    background: #667eea;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9em;
}

/* Camera Styles */
.scan-area {
    text-align: center;
}

#camera-container {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 15px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed #ddd;
}

#video, #camera-preview {
    width: 100%;
    max-width: 500px;
    border-radius: 10px;
}

#camera-preview {
    padding: 40px;
    color: #999;
    font-size: 1.2em;
}

.camera-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.2);
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

#captured-image {
    text-align: center;
    margin: 15px 0;
}

#captured-image img {
    max-width: 100%;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.action-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 15px;
}

/* Result Styles */
.result-box {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    line-height: 1.8;
}

.result-box .score {
    font-size: 2em;
    font-weight: bold;
    color: #667eea;
    text-align: center;
    margin: 10px 0;
}

.result-box .feedback {
    background: white;
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
}

/* Teacher Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group textarea,
.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-family: inherit;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group textarea:focus,
.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

#current-guide {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    min-height: 60px;
}

.loading {
    text-align: center;
    padding: 20px;
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40%, 60% { content: '..'; }
    80%, 100% { content: '...'; }
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 1.8em;
    }
    
    .main-nav {
        flex-direction: column;
    }
    
    .camera-controls {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .action-buttons {
        flex-direction: column;
    }
}