* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --preto: #000000;
    --branco: #FFFFFF;
    --cinza-escuro: #1a1a1a;
    --cinza-medio: #333333;
    --cinza-claro: #666666;
    --cinza-muito-claro: #f5f5f5;
    --borda: #e0e0e0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--branco);
    color: var(--cinza-medio);
    line-height: 1.6;
    min-height: 100vh;
}

.header {
    background-color: var(--preto);
    color: var(--branco);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--borda);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--branco);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info span {
    color: var(--cinza-muito-claro);
    font-size: 0.9rem;
}

.btn-logout {
    background-color: var(--cinza-escuro);
    color: var(--branco);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.btn-logout:hover {
    background-color: var(--cinza-medio);
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--preto) 0%, var(--cinza-escuro) 100%);
    padding: 2rem;
}

.auth-box {
    background-color: var(--branco);
    border-radius: 12px;
    padding: 3rem;
    max-width: 450px;
    width: 100%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.auth-box h2 {
    color: var(--preto);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--cinza-claro);
    margin-bottom: 2rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--cinza-medio);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--borda);
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--preto);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: var(--preto);
    color: var(--branco);
}

.btn-primary:hover {
    background-color: var(--cinza-escuro);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-danger {
    background-color: #dc3545;
    color: var(--branco);
}

.btn-danger:hover {
    background-color: #c82333;
}

.auth-link {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--cinza-claro);
    font-size: 0.9rem;
}

.auth-link a {
    color: var(--preto);
    text-decoration: none;
    font-weight: 600;
}

.auth-link a:hover {
    text-decoration: underline;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert-error {
    background-color: #fee;
    color: #c00;
    border: 1px solid #fcc;
}

.alert-success {
    background-color: #efe;
    color: #060;
    border: 1px solid #cfc;
}

.dashboard {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: calc(100vh - 80px);
}

.chat-section {
    display: flex;
    flex-direction: column;
}

.chat-container {
    background-color: var(--branco);
    border: 1px solid var(--borda);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 180px);
    overflow: hidden;
}

.chat-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--borda);
    background-color: var(--preto);
    color: var(--branco);
}

.chat-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.chat-header p {
    font-size: 0.9rem;
    color: var(--cinza-muito-claro);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    display: flex;
    animation: fadeIn 0.3s ease;
}

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

.user-message {
    justify-content: flex-end;
}

.system-message {
    justify-content: flex-start;
}

.message-content {
    max-width: 80%;
    padding: 1rem;
    border-radius: 12px;
    position: relative;
}

.user-message .message-content {
    background-color: var(--preto);
    color: var(--branco);
}

.system-message .message-content {
    background-color: var(--cinza-muito-claro);
    color: var(--cinza-medio);
    border: 1px solid var(--borda);
}

.message-content p {
    margin-bottom: 0.5rem;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-top: 0.5rem;
    display: block;
}

.chat-input {
    padding: 1rem;
    border-top: 1px solid var(--borda);
    background-color: var(--cinza-muito-claro);
}

.chat-input form {
    display: flex;
    gap: 0.5rem;
}

.chat-input input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--borda);
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
}

.chat-input input:focus {
    outline: none;
    border-color: var(--preto);
}

.btn-send {
    padding: 0.75rem 2rem;
    background-color: var(--preto);
    color: var(--branco);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-send:hover {
    background-color: var(--cinza-escuro);
}

.contratos-section {
    display: flex;
    flex-direction: column;
}

.contratos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background-color: var(--preto);
    color: var(--branco);
    border-radius: 12px 12px 0 0;
}

.contratos-header h3 {
    font-size: 1.25rem;
}

.badge {
    background-color: var(--branco);
    color: var(--preto);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.contratos-lista {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    background-color: var(--cinza-muito-claro);
    border: 1px solid var(--borda);
    border-top: none;
    border-radius: 0 0 12px 12px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--cinza-claro);
}

.contrato-card {
    background-color: var(--branco);
    border: 1px solid var(--borda);
    border-radius: 8px;
    padding: 1.25rem;
    transition: all 0.3s;
}

.contrato-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.contrato-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.75rem;
}

.contrato-header h4 {
    color: var(--preto);
    font-size: 1rem;
    font-weight: 600;
    margin-right: 0.5rem;
}

.contrato-badge {
    background-color: var(--preto);
    color: var(--branco);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
}

.contrato-info {
    margin-bottom: 1rem;
    color: var(--cinza-claro);
    font-size: 0.85rem;
}

.contrato-actions {
    display: flex;
    gap: 0.5rem;
}

.footer {
    background-color: var(--preto);
    color: var(--branco);
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
}

.footer p {
    font-size: 0.9rem;
    color: var(--cinza-muito-claro);
}

@media (max-width: 1024px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .contratos-section {
        max-height: 500px;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .header-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .dashboard {
        padding: 1rem;
        gap: 1rem;
    }
    
    .chat-container {
        height: 60vh;
    }
    
    .message-content {
        max-width: 90%;
    }
    
    .auth-box {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .contrato-actions {
        flex-direction: column;
    }
    
    .btn-sm {
        width: 100%;
    }
    
    .chat-input input {
        font-size: 16px;
    }
}