@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #3B82F6;
    --accent-color: #EC4899;
    --bg-color: #F8F9FA;
    --surface-color: #FFFFFF;
    --text-color: #212529;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    height: 100vh;
    margin: 0;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    box-shadow: 0 0 25px rgba(0,0,0,0.05);
    background-color: var(--surface-color);
}

.chat-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    font-size: 1.25rem;
    border-bottom: 1px solid #dee2e6;
}

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

.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    padding: 0.75rem 1.25rem;
    border-radius: 1rem;
    line-height: 1.5;
}

.message.user {
    background-color: var(--primary-color);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 0.25rem;
}

.message.bot {
    background-color: #E9ECEF;
    color: var(--text-color);
    align-self: flex-start;
    border-bottom-left-radius: 0.25rem;
}

.message-sender {
    font-weight: 600;
    font-size: 0.8rem;
    margin-bottom: 0.25rem;
    opacity: 0.8;
}

.chat-input-form {
    display: flex;
    padding: 1rem;
    border-top: 1px solid #dee2e6;
    background-color: var(--surface-color);
}

.chat-input {
    flex-grow: 1;
    border: 1px solid #ced4da;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    margin-right: 0.5rem;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.25);
}

.send-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.send-button:hover {
    background-color: #2563EB;
}