.chat-container {
    max-width: 900px;
    margin: 0 auto;
}

.chat-messages {
    height: 55vh;
    overflow-y: auto;
    background: #f8f9fa;
}

.chat-msg-student {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: #e3f2fd;
    border-radius: 12px 12px 0 12px;
    margin-left: 2rem;
}

.chat-msg-assistant {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 12px 12px 12px 0;
    margin-right: 2rem;
}

.chat-msg-header {
    margin-bottom: 0.25rem;
    font-size: 0.8rem;
    color: #6c757d;
}

.chat-msg-body p:last-child {
    margin-bottom: 0;
}

.chat-msg-body ul, .chat-msg-body ol {
    margin-bottom: 0.5rem;
}

.chat-msg-fonti {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid #dee2e6;
}

.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

.hero-section p {
    font-size: 1.2rem;
    opacity: 0.9;
}