:root {
    --bg-main: #0f172a;
    --bg-sidebar: #1e293b;
    --bg-panel: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --success: #22c55e;
    --message-client: #334155;
    --message-manager: #3b82f6;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 350px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.status-indicator .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
}

.status-indicator.online .dot {
    background-color: var(--success);
    box-shadow: 0 0 8px var(--success);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
}

.chat-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    gap: 12px;
}

.chat-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.chat-item.active {
    background-color: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--primary);
}

.chat-item.unread .chat-item-name {
    font-weight: 600;
    color: #fff;
}

.chat-item.unread::after {
    content: '';
    width: 10px;
    height: 10px;
    background-color: var(--primary);
    border-radius: 50%;
    align-self: center;
    margin-left: auto;
}

.chat-item-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.chat-item-details {
    flex: 1;
    overflow: hidden;
}

.chat-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.chat-item-name {
    font-size: 0.95rem;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.chat-item-last-msg {
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.empty-state {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-main);
    background-image: radial-gradient(circle at center, rgba(59, 130, 246, 0.03) 0%, transparent 70%);
}

.chat-header {
    padding: 15px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-panel);
    backdrop-filter: blur(10px);
}

.client-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.client-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--message-client);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.client-info h3 {
    font-size: 1.1rem;
    font-weight: 500;
}

.client-status {
    font-size: 0.8rem;
    color: var(--success);
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.2s;
    padding: 8px;
}

.btn-icon:hover {
    color: #ef4444;
}

.chat-messages {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 0.95rem;
    line-height: 1.5;
    position: relative;
    word-break: break-word;
}

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

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

.chat-msg-actions {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: -70px;
    background: transparent;
    border: none;
    box-shadow: none;
    display: none;
    padding: 0;
    z-index: 10;
    gap: 4px;
}
.message-manager .chat-msg-actions {
    right: auto;
    left: -70px;
    flex-direction: row-reverse;
}
.message:hover .chat-msg-actions { display: flex; }
.chat-action-btn { cursor: pointer; padding: 6px; font-size: 16px; border-radius: 50%; background: var(--bg-panel); color: var(--text-muted); box-shadow: 0 2px 5px rgba(0,0,0,0.2); transition: all 0.2s; }
.chat-action-btn:hover { background: var(--primary); color: #fff; transform: scale(1.1); }

.reply-preview-box {
    background: rgba(0,0,0,0.15);
    border-left: 3px solid var(--primary);
    padding: 6px 10px;
    font-size: 0.8rem;
    margin-bottom: 6px;
    border-radius: 0 4px 4px 0;
    opacity: 0.9;
}

.reactions-badge {
    position: absolute;
    bottom: -10px;
    right: -10px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2px 6px;
    font-size: 14px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    display: flex;
    gap: 4px;
}
.message-manager .reactions-badge {
    right: auto;
    left: -10px;
}

.reaction-popover {
    position: absolute;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    display: none;
    padding: 4px 8px;
    z-index: 100;
    gap: 8px;
}
.reaction-popover-btn { cursor: pointer; padding: 4px; border-radius: 50%; font-size: 20px; transition: transform 0.2s; user-select: none; }
.reaction-popover-btn:hover { transform: scale(1.3); }

.reply-banner {
    padding: 10px 24px;
    font-size: 0.85rem;
    border-left: 3px solid var(--primary);
    background: rgba(59, 130, 246, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
}
.reply-banner-close { cursor: pointer; font-weight: bold; padding: 4px 8px; border-radius: 4px; transition: background 0.2s; }
.reply-banner-close:hover { background: rgba(255,255,255,0.1); }

.message-time {
    display: block;
    font-size: 0.7rem;
    margin-top: 6px;
    opacity: 0.7;
    text-align: right;
}

.chat-input-area {
    padding: 20px 24px;
    background-color: var(--bg-panel);
    border-top: 1px solid var(--border-color);
}

#send-form {
    display: flex;
    gap: 12px;
}

#message-input {
    flex: 1;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 12px 20px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}

#message-input:focus {
    border-color: var(--primary);
}

.btn-send {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background-color: var(--primary);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: background-color 0.2s, transform 0.1s;
}

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

.btn-send:active {
    transform: scale(0.95);
}

.no-chat-selected {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.no-chat-selected .icon-placeholder {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.2;
}

.no-chat-selected h2 {
    font-size: 1.5rem;
    color: var(--text-main);
    margin-bottom: 8px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Typing Indicator */
.typing-indicator {
    padding: 10px 24px;
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(59, 130, 246, 0.05);
    border-top: 1px solid var(--border-color);
}

.typing-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

.typing-text-preview {
    margin-left: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 80%;
}