:root {
    --primary: #c98845; /* Brand color */
    --primary-dark: #b07030;
    --bg-color: #f0f2f5;
    --msg-client: #dcf8c6; /* WhatsApp style outgoing */
    --msg-admin: #ffffff;
}

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

.chat-container {
    width: 100%;
    max-width: 500px;
    height: 100vh;
    background: #fff;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

@media (min-width: 576px) {
    .chat-container {
        height: 90vh;
        border-radius: 12px;
        overflow: hidden;
    }
}

.chat-header {
    background-color: var(--primary);
    color: white;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}
.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

#chat-screen {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background-color: #e5ddd5;
    background-image: url('https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png');
    display: flex;
    flex-direction: column;
}

.message {
    max-width: 80%;
    margin-bottom: 12px;
    display: flex;
    flex-direction: column;
}

.message.client {
    align-self: flex-end;
}
.message.admin {
    align-self: flex-start;
}

.message-content {
    padding: 8px 12px;
    border-radius: 8px;
    position: relative;
    font-size: 0.95rem;
    box-shadow: 0 1px 1px rgba(0,0,0,0.1);
    word-wrap: break-word;
}

.message.client .message-content {
    background-color: var(--msg-client);
    border-top-right-radius: 0;
}
.message.admin .message-content {
    background-color: var(--msg-admin);
    border-top-left-radius: 0;
}

.message-time {
    font-size: 0.7rem;
    color: #999;
    align-self: flex-end;
    margin-top: 2px;
}

.chat-input-area {
    background-color: #f0f2f5;
    padding: 10px 15px;
    border-top: 1px solid #ddd;
}

textarea#message-input {
    resize: none;
    border-radius: 20px;
    padding: 10px 15px;
    max-height: 100px;
}

.attach-btn, .send-btn {
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.file-preview-area {
    padding-bottom: 10px;
    display: flex;
    gap: 10px;
    overflow-x: auto;
}

.file-preview-item {
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 5px 10px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
}
.file-preview-item .remove-file {
    cursor: pointer;
    color: red;
}

.attachment {
    margin-top: 5px;
    display: block;
}
.attachment img {
    max-width: 100%;
    border-radius: 5px;
    cursor: pointer;
}
.attachment-link {
    display: flex;
    align-items: center;
    background: rgba(0,0,0,0.05);
    padding: 8px;
    border-radius: 5px;
    text-decoration: none;
    color: #333;
    font-size: 0.85rem;
}