body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.chat-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    background: #eeeeee; /* dark-ish */
}

.msg-row {
    display: flex;
    margin: 10px 0;
    flex-direction: column; /* so options can appear under bubble */
    gap: 8px;
}

.msg-row.user { align-items: flex-end; }
.msg-row.assistant { align-items: flex-start; }

.bubble {
    max-width: 78%;
    padding: 10px 12px;
    border-radius: 14px;
    white-space: pre-wrap;
    line-height: 1.25rem;
}

.bubble.user {
    background: #333333;
    color: #fff;
    border-bottom-right-radius: 6px;
}

.bubble.assistant {
    background: #666666;
    color: #e5e7eb;
    border-bottom-left-radius: 6px;
}

.options-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.option-btn {
    border: 1px solid #111111;
    background: #55c5aa;
    color: #e5e7eb;
    padding: 8px 10px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
}

.option-btn:hover {
    background: #88c5cc;
}

.composer {
    display: flex;
    gap: 10px;
    padding: 10px;
    border-top: 1px solid rgba(0,0,0,0.15);
    background: #ffffff;
}

.composer input {
    flex: 1;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid #cccccc;
    background: #ffffff;
    color: #000000;
    outline: none;
}

.composer button {
    padding: 10px 14px;
    border-radius: 10px;
    border: none;
    background: #22c55e;
    color: #06210f;
    font-weight: 600;
    cursor: pointer;
}