/* ===========================
   Chat Interface Styles
   =========================== */

#chat {
    padding: 4rem 0;
    background: var(--white);
}

.chat-container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    border: 1px solid var(--border);
}

.chat-header {
    padding: 2rem 2.5rem;
    background: linear-gradient(135deg, var(--accent) 0%, #0052a3 100%);
    color: var(--white);
}

.chat-header h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--white);
    text-align: left;
}

.chat-header p {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
}

.chat-starters {
    padding: 1.5rem 2.5rem;
    background: var(--light);
    border-bottom: 1px solid var(--border);
}

.starter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
}

.starter-btn {
    padding: 0.875rem 1rem;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    line-height: 1.4;
}

.starter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.1);
}

.starter-btn:active {
    transform: translateY(0);
}

.chat-window {
    display: flex;
    flex-direction: column;
    height: 500px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 2.5rem;
    background: var(--white);
}

.welcome-message {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 0.5s ease;
}

.message-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.message-content {
    flex: 1;
}

.message-content p {
    margin: 0;
    padding: 0.875rem 1.25rem;
    background: var(--light);
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--primary);
}

.message {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 0.3s ease;
}

.message.user {
    flex-direction: row-reverse;
}

.message.user .message-avatar {
    background: var(--accent);
}

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

.message.user .message-content p {
    background: var(--accent);
    color: var(--white);
    border-radius: 12px 12px 4px 12px;
    max-width: 80%;
}

.message.assistant .message-content p {
    background: var(--light);
    color: var(--primary);
    border-radius: 12px 12px 12px 4px;
    max-width: 85%;
}

.chat-input-area {
    padding: 1.25rem 2.5rem;
    background: var(--light);
    border-top: 1px solid var(--border);
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--secondary);
    opacity: 0.8;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--secondary);
    border-radius: 50%;
    opacity: 0.4;
    animation: dotPulse 1.4s infinite;
}

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

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

.input-wrapper {
    display: flex;
    gap: 0.75rem;
}

#chatInput {
    flex: 1;
    padding: 0.875rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--white);
    color: var(--primary);
    transition: border-color 0.2s;
}

#chatInput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

#chatInput::placeholder {
    color: var(--secondary);
    opacity: 0.6;
}

#chatSend {
    padding: 0.875rem 1.5rem;
    background: var(--accent);
    color: var(--white);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

#chatSend:hover {
    background: #0052a3;
}

#chatSend:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

@keyframes dotPulse {
    0%, 60%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    30% {
        opacity: 1;
        transform: scale(1.2);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .chat-container {
        margin: 0 1rem;
    }
    
    .chat-header,
    .chat-starters,
    .chat-messages,
    .chat-input-area {
        padding: 1.5rem;
    }
    
    .starter-grid {
        grid-template-columns: 1fr;
    }
    
    .chat-window {
        height: 450px;
    }
    
    .message.user .message-content p,
    .message.assistant .message-content p {
        max-width: 90%;
    }
}

@media (max-width: 480px) {
    .chat-window {
        height: 400px;
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
        font-size: 0.7rem;
    }
    
    .message {
        gap: 0.75rem;
    }
}