/* --- Rs Calculator Theme Variables --- */
:root {
    /* --- General Palette --- */
    --hw-primary-color: #7B5C63;
    --hw-bg-color: #F6F7F4;
    --hw-surface-color: #EFF1EB;
    --hw-accent-surface-color: #DEE3D9;
    --hw-text-primary-color: #4F4A4B;
    --hw-text-secondary-color: #837C7E;
    --hw-border-color: #D0C9CB;
    --hw-light-text-color: #EFF1EB;
    --hw-shadow-color: rgba(0, 0, 0, 0.08);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--hw-bg-color);
    color: var(--hw-text-primary-color);
    margin: 0;
    padding: 0;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

#chat-container {
    width: 100%;
    height: 100%;
    max-width: 100%; 
    background-color: var(--hw-surface-color);
    border-radius: 0;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#chat-header {
    background-color: var(--hw-primary-color);
    color: var(--hw-light-text-color);
    height: 60px;
    padding: 0 8px 0 16px;
    border-bottom: 1px solid var(--hw-border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
    flex-shrink: 0;
}

#header-title {
    line-height: 1.3;
}

#header-title h2 {
    margin: 0;
    font-size: 1.1em;
    font-weight: 600;
    color: #F6F7F4;
    margin-bottom: 2px;
}

#header-title span {
    font-size: 0.95em;
    font-weight: 400;
    color: var(--hw-light-text-color);
    opacity: 1;
}

#header-buttons {
    display: flex;
    gap: 0;
}

#header-buttons button {
    background: transparent;
    border: none;
    color: var(--hw-light-text-color);
    
    padding: 8px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}



#header-buttons button svg {
    fill: var(--hw-light-text-color);
}

#chat-window {
    flex-grow: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    background-color: var(--hw-bg-color);
}

.message {
    max-width: 85%;
    padding: 10px 15px;
    border-radius: 16px;
    margin-bottom: 10px;
    line-height: 1.5;
    word-wrap: break-word;
    font-size: 0.95em;
}

.message.sent {
    background-color: var(--hw-primary-color);
    color: var(--hw-light-text-color);
    align-self: flex-end;
    border-bottom-right-radius: 6px;
}

.message.received {
    background-color: var(--hw-surface-color);
    color: var(--hw-text-primary-color);
    align-self: flex-start;
    border-bottom-left-radius: 6px;
    border: 1px solid #E0E2DA;
}

#chat-input-container {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    border-top: 1px solid var(--hw-border-color);
    background-color: var(--hw-surface-color);
    gap: 10px;
}

#user-input {
    flex-grow: 1;
    border: 1px solid var(--hw-border-color);
    border-radius: 25px;
    padding: 12px 18px;
    font-size: 1em;
    margin-right: 0;
    background-color: #FFFFFF;
    color: var(--hw-text-primary-color);
    transition: border-color 0.2s;
}

#user-input:focus {
    outline: none;
    border-color: var(--hw-primary-color);
}

#user-input:disabled {
    background-color: var(--hw-accent-surface-color);
    cursor: not-allowed;
}

#send-btn {
    background-color: var(--hw-primary-color);
    color: var(--hw-light-text-color);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.2s;
}

#send-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--hw-light-text-color);
}

#send-btn:disabled {
    background-color: #B0A9AC; /* Muted version of primary */
    cursor: not-allowed;
    opacity: 0.7;
}

.message ul {
    padding-left: 25px;
    margin-top: 5px;
    margin-bottom: 5px;
}

.message li {
    margin-bottom: 4px;
}