.openai-chat {
    border: none;
    border-radius: 0;
    overflow: hidden;
    background: #fff;
    margin: 0;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
}

.openai-header {
    padding: 24px 32px;
    color: #fff;
    background: #667eea;
    flex-shrink: 0;
}

.openai-header h3 { 
    margin: 0; 
    font-size: 24px; 
    color: #fff; 
    font-weight: 700;
}

.openai-header p { 
    margin: 8px 0 0 0; 
    font-size: 14px; 
    opacity: 0.9; 
    color: #fff; 
}

.openai-messages {
    flex: 1;
    padding: 24px 32px;
    overflow-y: auto;
    background: #f9fafb;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Scrollbar personalizzata */
.openai-messages::-webkit-scrollbar {
    width: 8px;
}

.openai-messages::-webkit-scrollbar-track {
    background: #f1f3f5;
}

.openai-messages::-webkit-scrollbar-thumb {
    background: #cbd5e0;
    border-radius: 4px;
}

.openai-messages::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

.openai-msg {
    max-width: 90%;
    display: flex;
}

.openai-msg.openai-user {
    align-self: flex-end;
    justify-content: flex-end;
}

.openai-msg.openai-assistant {
    align-self: flex-start;
}

.openai-msg-content {
    padding: 14px 18px;
    border-radius: 12px;
    font-size: 15px;
    line-height: 1.6;
    word-wrap: break-word;
}

.openai-user .openai-msg-content {
    background: #667eea;
    color: #fff;
    border-bottom-right-radius: 4px;
}

.openai-assistant .openai-msg-content {
    background: #fff;
    border: 1px solid #e5e7eb;
    color: #374151;
    border-bottom-left-radius: 4px;
    width: 100%;
}

/* Stili markdown nelle risposte */
.openai-assistant .openai-msg-content h2,
.openai-assistant .openai-msg-content h3,
.openai-assistant .openai-msg-content h4 {
    margin: 16px 0 8px 0;
    color: #1f2937;
    font-weight: 600;
}

.openai-assistant .openai-msg-content h2 { font-size: 18px; }
.openai-assistant .openai-msg-content h3 { font-size: 16px; }
.openai-assistant .openai-msg-content h4 { font-size: 15px; }

.openai-assistant .openai-msg-content h2:first-child,
.openai-assistant .openai-msg-content h3:first-child,
.openai-assistant .openai-msg-content h4:first-child {
    margin-top: 0;
}

.openai-assistant .openai-msg-content ul,
.openai-assistant .openai-msg-content ol {
    margin: 12px 0;
    padding-left: 24px;
}

.openai-assistant .openai-msg-content li {
    margin-bottom: 6px;
    line-height: 1.5;
}

/* Liste nidificate */
.openai-assistant .openai-msg-content ul ul,
.openai-assistant .openai-msg-content ol ul,
.openai-assistant .openai-msg-content ul ol,
.openai-assistant .openai-msg-content ol ol {
    margin: 6px 0;
    padding-left: 20px;
}

.openai-assistant .openai-msg-content ul ul {
    list-style-type: circle;
}

.openai-assistant .openai-msg-content ul ul ul {
    list-style-type: square;
}

.openai-assistant .openai-msg-content code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 13px;
    color: #e11d48;
}

.openai-assistant .openai-msg-content strong {
    font-weight: 600;
    color: #111827;
}

.openai-assistant .openai-msg-content em {
    font-style: italic;
}

.openai-msg.openai-error .openai-msg-content {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.openai-form {
    padding: 24px 32px;
    background: #fff;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-shrink: 0;
}

.openai-form textarea {
    flex: 1;
    padding: 14px 16px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    resize: none;
    max-height: 150px;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.5;
}

.openai-form textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.openai-form button {
    padding: 14px 28px;
    background: #667eea;
    color: #fff;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
    transition: transform 0.1s, background 0.2s;
    height: 50px;
}

.openai-form button:hover {
    background: #5a6fd8;
}

.openai-form button:active {
    transform: scale(0.98);
}

.openai-loading {
    display: none;
    text-align: center;
    padding: 12px;
    background: #f9fafb;
}

.openai-loading span {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: #667eea;
    border-radius: 50%;
    margin: 0 4px;
    animation: bounce 1.4s infinite ease-in-out both;
}

.openai-loading span:nth-child(1) { animation-delay: -0.32s; }
.openai-loading span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* Fix per i trial cards dentro la chat */
.openai-assistant .clinical-trials-container {
    margin-top: 16px;
    width: 100%;
}

body button.openai-upload-btn {
    background: #f9fafb !important;
    color: #374151;
    border: 1px solid #d1d5db;
    cursor: pointer;
    transition: all 0.2s;
}

body button.openai-upload-btn:hover {
    background: #f3f4f6 !important;
}

body button.openai-upload-btn.has-file {
    background: #dbeafe !important;
    border-color: #3b82f6;
    color: #1d4ed8;
}

/* System messages */
.openai-system {
    align-self: center !important;
    max-width: 80% !important;
}

.openai-system .openai-msg-content {
    background: #fef3c7 !important;
    color: #92400e !important;
    font-size: 13px;
    padding: 8px 16px !important;
    border-radius: 20px !important;
}

/* Responsive per tablet e mobile */
@media (max-width: 768px) {
    .openai-header {
        padding: 20px 20px;
    }
    
    .openai-header h3 {
        font-size: 20px;
    }
    
    .openai-messages {
        padding: 20px 16px;
    }
    
    .openai-form {
        padding: 16px 16px;
    }
    
    .openai-msg {
        max-width: 95%;
    }
}