:root {
  --bg: #0f0f0f;
  --card: #1a1a1a;
  --border: #2a2a2a;
  --gold: #f0c040;
  --text: #e5e5e5;
  --text-dim: #888;
  --green: #22c55e;
  --red: #ef4444;
  --blue: #3b82f6;
  --msg-in: #1e1e2e;
  --msg-out: #2a2a1a;
  --sidebar-w: 1fr;
  --profile-w: 1fr;
}

[data-theme="light"] {
  --bg: #f5f5f5;
  --card: #fff;
  --border: #e0e0e0;
  --gold: #d4a017;
  --text: #1a1a1a;
  --text-dim: #666;
  --msg-in: #f0f0f0;
  --msg-out: #fdf6e3;
}

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

/* Dark scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #444; }
html { scrollbar-color: var(--border) transparent; scrollbar-width: thin; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); height: 100vh; display: flex; flex-direction: column; }

/* Header */
header { display: flex; align-items: center; gap: 16px; padding: 8px 16px; background: var(--card); border-bottom: 1px solid var(--border); flex-shrink: 0; }
.header-left h1 { font-size: 16px; color: var(--gold); white-space: nowrap; }
.tabs { display: flex; gap: 4px; flex: 1; justify-content: center; }
.tab { background: none; border: none; color: var(--text-dim); padding: 8px 16px; cursor: pointer; border-radius: 6px; font-size: 13px; transition: all .2s; }
.tab:hover { color: var(--text); background: var(--border); }
.tab.active { color: var(--gold); background: rgba(240,192,64,.1); }
.header-right { display: flex; align-items: center; gap: 8px; }
.badge { padding: 4px 10px; border-radius: 12px; font-size: 11px; font-weight: 600; text-transform: uppercase; }
.badge.online { background: rgba(34,197,94,.15); color: var(--green); }
.badge.offline { background: rgba(239,68,68,.15); color: var(--red); }
#theme-toggle, #logout-btn { background: none; border: 1px solid var(--border); color: var(--text-dim); padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 12px; }

/* Main & Tabs */
main { flex: 1; overflow: hidden; }
.tab-content { display: none; height: 100%; }
.tab-content.active { display: block; overflow-y: auto; height: 100%; }
#tab-chat.active { display: block; overflow: hidden; }

/* Chat Layout */
.chat-layout { display: grid; grid-template-columns: 280px 1fr 300px; height: 100%; }

/* Conversations Sidebar */
.conversations-sidebar { border-right: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; }
.sidebar-header { padding: 12px; border-bottom: 1px solid var(--border); }
.sidebar-header input { width: 100%; padding: 8px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 13px; }
.filters { display: flex; gap: 4px; margin-top: 8px; }
.filter { flex: 1; background: none; border: 1px solid var(--border); color: var(--text-dim); padding: 4px 8px; border-radius: 4px; cursor: pointer; font-size: 11px; }
.filter.active { border-color: var(--gold); color: var(--gold); }
.conv-list { flex: 1; overflow-y: auto; }

/* Conversation Item */
.conv-item { display: flex; gap: 10px; padding: 12px; cursor: pointer; border-bottom: 1px solid var(--border); transition: background .15s; }
.conv-item:hover { background: var(--border); }
.conv-item.active { background: rgba(240,192,64,.08); border-left: 3px solid var(--gold); }
.conv-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--border); display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 16px; flex-shrink: 0; color: var(--gold); }
.conv-info { flex: 1; min-width: 0; }
.conv-name { font-size: 13px; font-weight: 500; display: flex; justify-content: space-between; }
.conv-name .time { font-size: 11px; color: var(--text-dim); font-weight: 400; }
.conv-preview { font-size: 12px; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.conv-meta { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.unread-badge { background: var(--gold); color: #000; font-size: 10px; font-weight: 700; padding: 1px 6px; border-radius: 10px; }
.status-pill { font-size: 10px; padding: 2px 6px; border-radius: 4px; background: var(--border); }
.status-pill.new { color: var(--blue); }
.status-pill.sold, .status-pill.paid { color: var(--green); }
.status-pill.rejected { color: var(--red); }

/* Chat Main */
.chat-main { display: flex; flex-direction: column; overflow: hidden; }
.chat-header { padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 14px; display: flex; align-items: center; gap: 12px; }
.chat-header select { background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 4px 8px; border-radius: 4px; font-size: 12px; }
.messages-container { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 4px; }
.empty-state { color: var(--text-dim); text-align: center; margin: auto; font-size: 14px; }

/* Messages */
.msg { max-width: 70%; padding: 8px 12px; border-radius: 12px; font-size: 13px; line-height: 1.5; word-wrap: break-word; }
.msg.in { background: var(--msg-in); align-self: flex-start; border-bottom-left-radius: 4px; }
.msg.out { background: var(--msg-out); align-self: flex-end; border-bottom-right-radius: 4px; }
.msg.system { align-self: center; color: var(--text-dim); font-size: 11px; background: none; }
.msg .msg-time { font-size: 10px; color: var(--text-dim); margin-top: 4px; }
.msg.pending { opacity: 0.5; }
.msg img { max-width: 240px; border-radius: 8px; margin-top: 4px; cursor: pointer; }

/* Chat Input */
.chat-input-area { border-top: 1px solid var(--border); padding: 8px 16px; }
.quick-replies { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; }
.qr-btn { background: var(--bg); border: 1px solid var(--border); color: var(--text-dim); padding: 4px 10px; border-radius: 12px; cursor: pointer; font-size: 11px; transition: all .15s; }
.qr-btn:hover { border-color: var(--gold); color: var(--gold); }
.input-row { display: flex; gap: 8px; align-items: flex-end; }
.input-row textarea { flex: 1; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 8px 12px; border-radius: 8px; font-size: 13px; resize: none; max-height: 120px; font-family: inherit; }
#send-btn { background: var(--gold); color: #000; border: none; padding: 8px 20px; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 13px; }

/* Lead Profile */
.lead-profile { border-left: 1px solid var(--border); padding: 12px; overflow-y: auto; font-size: 12px; }
.lead-profile h3 { font-size: 13px; margin-bottom: 8px; }
.profile-field { margin-bottom: 6px; }
.profile-field label { font-size: 10px; color: var(--text-dim); display: block; }
.profile-field span { font-size: 12px; }
.profile-field select { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 4px 6px; border-radius: 4px; margin-top: 2px; font-size: 12px; }
.profile-sales { margin-top: 16px; }
.profile-sales h4 { font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.sale-item { font-size: 12px; padding: 4px 0; border-bottom: 1px solid var(--border); }

/* Stats Tab */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; padding: 16px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.stat-card .label { font-size: 12px; color: var(--text-dim); }
.stat-card .value { font-size: 24px; font-weight: 700; margin-top: 4px; }
.stat-card .value.gold { color: var(--gold); }

/* Broadcast Tab */
.broadcast-form { padding: 16px; max-width: 600px; }
.broadcast-form textarea { width: 100%; min-height: 120px; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 12px; border-radius: 8px; font-size: 14px; font-family: inherit; margin-bottom: 12px; }
.broadcast-form select { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 8px 12px; border-radius: 6px; margin-bottom: 12px; }
.broadcast-form button { background: var(--gold); color: #000; border: none; padding: 10px 24px; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 14px; }
.broadcast-result { margin-top: 16px; padding: 12px; background: var(--card); border: 1px solid var(--border); border-radius: 8px; }

/* Settings Tab */
.settings-grid { padding: 16px; display: flex; flex-direction: column; gap: 16px; max-width: 500px; }
.setting-card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px; display: flex; justify-content: space-between; align-items: center; }
.setting-card .info h3 { font-size: 14px; }
.setting-card .info p { font-size: 12px; color: var(--text-dim); }
.toggle { width: 48px; height: 26px; border-radius: 13px; background: var(--border); cursor: pointer; position: relative; transition: background .2s; border: none; }
.toggle.on { background: var(--green); }
.toggle::after { content: ''; position: absolute; width: 22px; height: 22px; border-radius: 50%; background: #fff; top: 2px; left: 2px; transition: transform .2s; }
.toggle.on::after { transform: translateX(22px); }

/* Accounting Tab */
.accounting-content { padding: 16px; max-width: 700px; }
.period-selector { display: flex; gap: 8px; margin-bottom: 16px; align-items: center; }
.period-selector input { background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 6px 12px; border-radius: 6px; color-scheme: dark; }
[data-theme="light"] .period-selector input { color-scheme: light; }
input[type="date"]::-webkit-calendar-picker-indicator { cursor: pointer; opacity: 0.7; }
input[type="date"]::-webkit-calendar-picker-indicator:hover { opacity: 1; }
.period-selector button { background: var(--gold); color: #000; border: none; padding: 6px 16px; border-radius: 6px; cursor: pointer; font-weight: 600; }
.accounting-table { width: 100%; border-collapse: collapse; }
.accounting-table th, .accounting-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.accounting-table th { color: var(--text-dim); font-size: 11px; text-transform: uppercase; }
.accounting-total { margin-top: 16px; font-size: 18px; font-weight: 700; color: var(--gold); }

/* Login page */
.login-container { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 32px; width: 320px; text-align: center; }
.login-card h1 { color: var(--gold); font-size: 20px; margin-bottom: 24px; }
.login-card input { width: 100%; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 16px; text-align: center; margin-bottom: 16px; letter-spacing: 8px; }
.login-card button { width: 100%; padding: 12px; background: var(--gold); color: #000; border: none; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; }
.login-error { color: var(--red); font-size: 13px; margin-top: 8px; display: none; }

@media (max-width: 600px) {
  .chat-layout { grid-template-columns: 1fr; }
  .lead-profile { display: none !important; }
  .conversations-sidebar { display: none; }
  .conversations-sidebar.show { display: flex; position: fixed; left: 0; top: 48px; bottom: 0; width: 100%; z-index: 10; background: var(--bg); }
}