/* Public Key Cryptography Lesson Styles */

/* Visual Demos */
.visual-demo {
    background: #f8f9fa;
    border: 2px solid #4a90e2;
    border-radius: 8px;
    padding: 2rem;
    margin: 2rem 0;
}

.scenario-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0;
    gap: 1rem;
}

.participant {
    flex: 1;
    text-align: center;
}

.participant .avatar {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.channel {
    flex: 2;
    position: relative;
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 2rem 1rem;
    background: #fff;
}

.channel-label {
    text-align: center;
    color: #666;
    font-style: italic;
    margin-top: 1rem;
}

.message {
    background: #4a90e2;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-align: center;
    margin: 0.5rem 0;
}

.message.encrypted {
    background: #2c5aa0;
}

.interceptor {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    background: #fff;
    padding: 0.5rem;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.interceptor .avatar {
    font-size: 2rem;
}

.interceptor .small {
    font-size: 0.8rem;
    color: #e74c3c;
    margin: 0;
}

.problem-text {
    text-align: center;
    color: #e74c3c;
    font-weight: bold;
    margin-top: 1rem;
}

.solution-text {
    text-align: center;
    color: #27ae60;
    font-weight: bold;
    margin-top: 1rem;
}

.key-display {
    background: #e3f2fd;
    padding: 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.key-display.private {
    background: #ffebee;
}

/* Key Concept Boxes */
.key-concept {
    background: #e8f4f8;
    border-left: 4px solid #4a90e2;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.key-concept h3 {
    color: #2c5aa0;
    margin-top: 0;
}

/* Formula Boxes */
.formula-box {
    background: #f0f4ff;
    border: 2px solid #4a90e2;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
    font-family: 'Georgia', serif;
}

.formula-box h3 {
    color: #2c5aa0;
    margin-top: 0;
}

.formula-box p {
    font-size: 1.1rem;
    margin: 0.8rem 0;
}

/* RSA Demo */
.demo-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.demo-note {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    font-size: 0.9rem;
}

.key-display-area {
    margin-top: 1rem;
}

.key-pair {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.key-section {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    font-family: monospace;
}

.keys-display {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.public-key, .private-key {
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.public-key {
    background: #e3f2fd;
    border: 2px solid #2196f3;
}

.private-key {
    background: #ffebee;
    border: 2px solid #f44336;
}

.public-key h4, .private-key h4 {
    margin-top: 0;
    font-size: 1.2rem;
}

.key-note {
    font-size: 0.85rem;
    font-style: italic;
    color: #666;
    margin-top: 0.5rem;
}

/* Digital Signature */
.signature-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
}

.flow-step {
    background: white;
    border: 2px solid #4a90e2;
    border-radius: 8px;
    padding: 1.5rem;
    width: 100%;
    max-width: 500px;
}

.flow-step h4 {
    color: #2c5aa0;
    margin-top: 0;
}

.flow-content {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
    font-family: monospace;
}

.flow-arrow {
    font-size: 2rem;
    color: #4a90e2;
}

.flow-result {
    background: #d4edda;
    border: 2px solid #28a745;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

/* Applications Grid */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.app-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border-color: #4a90e2;
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.app-card h3 {
    color: #2c5aa0;
    margin: 0.5rem 0;
}

.app-card p {
    color: #666;
    font-size: 0.9rem;
}

/* Analogy Box */
.analogy-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.analogy-box h3 {
    color: white;
    margin-top: 0;
}

.analogy-box ol {
    margin: 1rem 0;
}

/* Diffie-Hellman Visualization */
.dh-visualization {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin: 2rem 0;
    gap: 1rem;
}

.dh-party, .dh-public {
    text-align: center;
}

.color-box {
    width: 100px;
    height: 100px;
    border: 3px solid #333;
    border-radius: 8px;
    margin: 1rem auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.dh-result {
    margin-top: 2rem;
    text-align: center;
}

.shared-secret {
    display: inline-block;
}

/* Security Table */
.table-container {
    overflow-x: auto;
    margin: 2rem 0;
}

.security-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.security-table th,
.security-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.security-table th {
    background: #4a90e2;
    color: white;
    font-weight: bold;
}

.security-table tr:hover {
    background: #f5f5f5;
}

/* Result styling */
.result {
    margin-top: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
    font-family: monospace;
}

.result h4 {
    margin-top: 0;
}

.result .success {
    color: #28a745;
    font-weight: bold;
}

.result .error {
    color: #dc3545;
    font-weight: bold;
}

.result .warning {
    color: #ffc107;
    font-weight: bold;
}

.info-text {
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
    .scenario-display {
        flex-direction: column;
    }
    
    .keys-display {
        grid-template-columns: 1fr;
    }
    
    .applications-grid {
        grid-template-columns: 1fr;
    }
    
    .dh-visualization {
        flex-direction: column;
    }
    
    .interceptor {
        position: relative;
        top: 0;
        transform: none;
        margin: 1rem 0;
    }
}

@media (max-width: 480px) {
    .visual-demo {
        padding: 1rem;
    }
    
    .participant .avatar {
        font-size: 2rem;
    }
    
    .app-icon {
        font-size: 2rem;
    }
    
    .color-box {
        width: 80px;
        height: 80px;
    }
}