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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:root {
    --chat-header-bg: #000000;
    --chat-header-text: #ffffff;
    --chat-accent: #f0b90b;
    --chat-accent-hover: #e4a700;
    --chat-accent-text: #1a1a1a;
    --chat-body-bg: #f5f5f5;
    --chat-panel-bg: #ffffff;
    --chat-border: #e5e5e5;
    --chat-text: #1a1a1a;
    --chat-text-muted: #666666;
    --chat-agent-bg: #f0f0f0;
    --chat-user-bg: var(--chat-accent);
    --chat-user-text: var(--chat-accent-text);
    --chat-online: #22c55e;
}

html, body.chat-page {
    height: 100%;
    height: 100dvh;
    max-height: 100dvh;
    overflow: hidden;
}

body.chat-page {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    background: var(--chat-body-bg);
    color: var(--chat-text);
}

.chat-header {
    background: var(--chat-header-bg);
    color: var(--chat-header-text);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    top: 0;
    z-index: 30;
    flex-shrink: 0;
}

.chat-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--chat-header-text);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    padding: 5px 8px;
    border-radius: 8px;
    transition: background-color 0.15s, opacity 0.15s;
    flex-shrink: 0;
}

.chat-back:hover {
    background: rgba(255, 255, 255, 0.1);
    text-decoration: none;
    color: var(--chat-header-text);
}

.chat-header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
}

.chat-header-logo {
    max-width: 80px;
    height: 26px;
    object-fit: contain;
    flex-shrink: 0;
}

.chat-header-logo[src=""] {
    display: none;
}

.chat-header-info h1 {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-header-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    opacity: 0.85;
    margin-top: 1px;
}

.chat-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--chat-online);
    flex-shrink: 0;
}

.chat-window {
    flex: 1;
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    padding: 10px 14px 12px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    background: var(--chat-panel-bg);
    border: 1px solid var(--chat-border);
    border-radius: 16px;
    padding: 14px;
    margin-bottom: 8px;
    min-height: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    -webkit-overflow-scrolling: touch;
}

.chat-message {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 14px;
    line-height: 1.45;
    word-wrap: break-word;
}

.chat-message-agent {
    align-self: flex-start;
    background: var(--chat-agent-bg);
    color: var(--chat-text);
    border-bottom-left-radius: 4px;
}

.chat-message-user {
    align-self: flex-end;
    background: var(--chat-user-bg);
    color: var(--chat-user-text);
    border-bottom-right-radius: 4px;
}

.chat-message-time {
    display: block;
    font-size: 10.5px;
    opacity: 0.65;
    margin-top: 3px;
}

.chat-typing {
    align-self: flex-start;
    display: none;
    align-items: center;
    gap: 4px;
    padding: 10px 14px;
    background: var(--chat-agent-bg);
    border-radius: 14px;
    border-bottom-left-radius: 4px;
}

.chat-typing.visible {
    display: inline-flex;
}

.chat-typing span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--chat-text-muted);
    animation: chat-bounce 1.2s infinite ease-in-out;
}

.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes chat-bounce {
    0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
    40% { transform: translateY(-5px); opacity: 1; }
}

.chat-input-bar {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-shrink: 0;
    background: var(--chat-panel-bg);
    border: 1px solid var(--chat-border);
    border-radius: 14px;
    padding: 6px 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.chat-input-bar input {
    flex: 1;
    padding: 8px 10px;
    border: none;
    outline: none;
    font-size: 14px;
    font-family: inherit;
    background: transparent;
    color: var(--chat-text);
    min-width: 0;
}

.chat-input-bar input:focus {
    box-shadow: none;
}

.chat-send {
    padding: 9px 18px;
    background: var(--chat-accent);
    color: var(--chat-accent-text);
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    font-family: inherit;
    transition: background-color 0.15s, opacity 0.15s;
    flex-shrink: 0;
}

.chat-send:hover {
    background: var(--chat-accent-hover);
}

.chat-send:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.chat-hold-banner {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-left: 4px solid #f59e0b;
    border-radius: 10px;
    padding: 8px 12px;
    margin-bottom: 8px;
    color: #92400e;
    font-size: 12px;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.chat-hold-banner .hold-bar-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.chat-hold-banner .hold-bar-btn {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    border: 1px solid rgba(0,0,0,0.1);
    background: rgba(255,255,255,0.7);
    color: #78350f;
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color 0.15s;
}

.chat-hold-banner .hold-bar-btn:hover {
    background: #ffffff;
}

.chat-hold-banner .hold-bar-details {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px dashed rgba(0, 0, 0, 0.12);
}

@media (max-width: 600px) {
    .chat-header {
        padding: 8px 12px;
    }
    .chat-header-info h1 {
        font-size: 13px;
    }
    .chat-window {
        padding: 6px 8px 8px;
    }
    .chat-messages {
        padding: 10px;
        margin-bottom: 6px;
        gap: 8px;
        border-radius: 12px;
    }
    .chat-message {
        padding: 8px 12px;
        font-size: 13px;
        border-radius: 12px;
        max-width: 90%;
    }
    .chat-input-bar {
        padding: 4px 6px;
        border-radius: 12px;
    }
    .chat-input-bar input {
        padding: 8px;
        font-size: 13px;
    }
    .chat-send {
        padding: 8px 14px;
        font-size: 12.5px;
        border-radius: 8px;
    }
    .chat-attach-btn {
        padding: 4px !important;
    }
    .chat-attach-btn svg {
        width: 18px;
        height: 18px;
    }
    .chat-hold-banner {
        padding: 6px 10px;
        font-size: 11px;
    }
}

.chat-message-sender {
    align-self: flex-start;
    background: #eef2ff;
    color: #312e81;
    border: 1px solid #c7d2fe;
    border-radius: 14px;
    border-bottom-left-radius: 4px;
}

.chat-message-sender .chat-message-sender-name {
    font-size: 11px;
    font-weight: 700;
    color: #4f46e5;
    margin-bottom: 4px;
    display: block;
}

.chat-message-agent .chat-message-sender-name {
    font-size: 11px;
    font-weight: 700;
    color: var(--chat-accent-hover, var(--chat-accent));
    margin-bottom: 4px;
    display: block;
}