/* Reset e Variáveis */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1e3a5f;
    --secondary-color: #2c5282;
    --accent-color: #4a90e2;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --border-color: #e2e8f0;
    --agent-message-bg: #edf2f7;
    --user-message-bg: #4a90e2;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 40px);
}

/* Cabeçalho */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    opacity: 0.95;
    font-style: italic;
    line-height: 1.5;
}

/* Chat Container */
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    background: var(--bg-color);
    scroll-behavior: smooth;
}

/* Scrollbar customization */
.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* Mensagens */
.message {
    margin-bottom: 24px;
    animation: fadeIn 0.3s ease-in;
}

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

.message-content {
    max-width: 85%;
    padding: 16px 20px;
    border-radius: 12px;
    line-height: 1.6;
}

.agent-message .message-content {
    background: var(--agent-message-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

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

.user-message .message-content {
    background: var(--user-message-bg);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Formatação de conteúdo nas mensagens */
.message-content p {
    margin-bottom: 12px;
}

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

.message-content strong {
    font-weight: 600;
    color: var(--primary-color);
}

.user-message .message-content strong {
    color: white;
}

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

.message-content li {
    margin-bottom: 8px;
}

.message-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 16px 0 8px 0;
    color: var(--secondary-color);
}

.message-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 12px 0 6px 0;
    color: var(--text-primary);
}

/* Área de Input */
.chat-input-container {
    background: var(--card-bg);
    padding: 20px 30px;
    border-top: 2px solid var(--border-color);
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    resize: none;
    min-height: 50px;
    max-height: 150px;
    transition: border-color 0.2s, box-shadow 0.2s;
    line-height: 1.5;
}

.chat-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.chat-input::placeholder {
    color: var(--text-light);
}

.send-button {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: var(--shadow-sm);
    min-width: 100px;
}

.send-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0);
}

.send-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 16px 20px;
    background: var(--agent-message-bg);
    border-radius: 12px;
    max-width: 80px;
    border: 1px solid var(--border-color);
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--text-light);
    border-radius: 50%;
    animation: typingAnimation 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingAnimation {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-8px);
    }
}

/* Responsividade Mobile */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        border-radius: 12px;
        min-height: calc(100vh - 20px);
    }

    .header {
        padding: 30px 20px;
    }

    .title {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .chat-messages {
        padding: 20px 15px;
    }

    .message-content {
        max-width: 90%;
        padding: 12px 16px;
        font-size: 0.95rem;
    }

    .chat-input-container {
        padding: 15px;
        gap: 8px;
    }

    .chat-input {
        padding: 12px 14px;
        font-size: 0.9rem;
    }

    .send-button {
        padding: 12px 20px;
        font-size: 0.9rem;
        min-width: 80px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.3rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .chat-input-container {
        flex-direction: column;
        align-items: stretch;
    }

    .send-button {
        width: 100%;
    }
}