:root {
    --primary-color: #f5a623;
    --primary-hover: #e09000;
    --light-bg: #24282b;
    --border-color: #2d3037;
    --text-color: #ffffff;
    --text-light: #6b7280;
    --user-msg-bg: #006efd;
    --assistant-msg-bg: #454545;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 200px);
    min-height: 400px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    background-color: var(--light-bg);
}

.message {
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    max-width: 80%;
}

.message p {
    white-space: pre-line;
    margin: 0;
    overflow-wrap: anywhere;
}

.user-message {
    background-color: var(--user-msg-bg);
    align-self: flex-end;
    margin-left: auto;
}

.assistant-message {
    background-color: var(--assistant-msg-bg);
    align-self: flex-start;
}

.message-input {
    display: flex;
    padding: 0.75rem;
    border-top: 1px solid var(--border-color);
    background-color: white;
}

#user-input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    resize: none;
    min-height: 44px;
}

#send-button {
    margin-left: 0.5rem;
    padding: 0 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

#send-button:hover {
    background-color: var(--primary-hover);
}

#send-button:disabled {
    background-color: var(--text-light);
    cursor: not-allowed;
}

.typing-indicator {
    display: none;
    font-style: italic;
    color: var(--text-light);
    padding: 1rem;
}

.typing-indicator.visible {
    display: block;
}

footer {
    margin-top: 1rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
}