:root {
    --bg: #0d0f14;
    --sb-bg: #111318;
    --msg-bg: #1a1c24;
    --user-bg: #1a2a3e;
    --border: #262930;
    --accent: #2563eb;
    --gold: #d97706;
    --text-main: #ffffff;      /* Чистый белый для ИИ-ответов */
    --text-silver: #e5e7eb;    /* Серебряный для сносок */
    --text-muted: #9ca3af;
}
* { box-sizing: border-box; margin: 0; padding: 0; font-family: sans-serif; -webkit-font-smoothing: antialiased; }
body { background: var(--bg); color: var(--text-main); height: 100vh; display: flex; overflow: hidden; }
.overlay, .modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(5, 5, 5, 0.85); display: flex; justify-content: center; align-items: center; z-index: 10000; }
.modal { display: none; }
.survey-card, .modal-content { background: var(--msg-bg); border: 1px solid var(--border); padding: 30px; border-radius: 16px; width: 100%; max-width: 500px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; color: var(--text-silver); font-size: 14px; }
.form-group select, .form-group input { width: 100%; padding: 12px; background: var(--bg); border: 1px solid var(--border); color: var(--text-main); border-radius: 8px; }
.survey-header { text-align: center; margin-bottom: 25px; }
#submit-survey-btn, .checkout-btn { width: 100%; padding: 14px; background: var(--accent); color: #fff; border: none; border-radius: 8px; font-weight: bold; cursor: pointer; }
.app-container { display: flex; width: 100%; height: 100%; }
.sidebar { width: 280px; background: var(--sb-bg); border-right: 1px solid var(--border); padding: 20px; display: flex; flex-direction: column; }
.sub-logo { color: var(--gold); font-size: 11px; font-weight: bold; display: block; }
.new-chat-btn { padding: 12px; background: var(--accent); color: white; border: none; border-radius: 8px; cursor: pointer; font-weight: bold; margin-bottom: 20px; }
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; }
.nav-item { padding: 12px; background: transparent; border: none; color: var(--text-silver); text-align: left; border-radius: 8px; cursor: pointer; font-size: 14px; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; }
.nav-item.active, .nav-item:hover { background: var(--msg-bg); color: var(--text-main); }
.sidebar-footer { border-top: 1px solid var(--border); padding-top: 15px; }
.sync-status { font-size: 11px; color: var(--text-muted); margin-bottom: 15px; }
.tariff-box { background: var(--msg-bg); padding: 12px; border-radius: 8px; border: 1px solid var(--border); }
.tariff-box p { font-size: 12px; font-weight: bold; margin-bottom: 8px; }
.upgrade-btn { background: transparent; border: none; color: var(--gold); font-size: 11px; font-weight: bold; cursor: pointer; text-decoration: underline; }
.main-content { flex: 1; display: flex; flex-direction: column; background: var(--bg); position: relative; }
.top-bar { padding: 20px; border-bottom: 1px solid var(--border); background: var(--sb-bg); display: flex; justify-content: space-between; align-items: center; }
.chat-title-area h2 { font-size: 16px; }
.chat-title-area p { font-size: 12px; color: var(--text-muted); }
.top-bar-controls { display: flex; align-items: center; gap: 15px; }
.live-toggle-container { display: flex; align-items: center; gap: 8px; }
.live-label { font-size: 11px; font-weight: bold; color: #ef4444; }
.switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #4b5563; transition: .3s; border-radius: 34px; }
.slider:before { position: absolute; content: ""; height: 16px; width: 16px; left: 3px; bottom: 3px; background-color: white; transition: .3s; border-radius: 50%; }
input:checked + .slider { background-color: #ef4444; }
input:checked + .slider:before { transform: translateX(18px); }
#lang-selector { padding: 6px; background: var(--bg); border: 1px solid var(--border); color: var(--text-main); border-radius: 6px; }
.chat-history { flex: 1; padding: 25px; overflow-y: auto; display: flex; flex-direction: column; gap: 20px; }
.message-wrapper { display: flex; width: 100%; }
.message-wrapper.user { justify-content: flex-end; }
.message-wrapper.ai { justify-content: flex-start; }
.message { max-width: 80%; padding: 15px 20px; border-radius: 12px; font-size: 15px; line-height: 1.6; word-wrap: break-word; }
.message-wrapper.user .message { background: var(--user-bg); color: var(--text-main); border-top-right-radius: 2px; }
.message-wrapper.ai .message { background: var(--msg-bg); color: var(--text-main); border: 1px solid var(--border); border-top-left-radius: 2px; }
.live-indicator { display: flex; align-items: center; gap: 10px; padding: 15px 25px; background: rgba(239, 68, 68, 0.1); font-size: 13px; color: #f87171; }
.spinner { width: 16px; height: 16px; border: 2px solid #f87171; border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }
.input-area { padding: 20px; background: var(--bg); }
.input-wrapper { max-width: 800px; margin: 0 auto; display: flex; background: var(--msg-bg); border: 1px solid var(--border); border-radius: 12px; padding: 10px 15px; align-items: flex-end; }
#user-input-box { flex: 1; background: transparent; border: none; color: var(--text-main); resize: none; font-size: 15px; max-height: 200px; outline: none; }
.send-btn { background: var(--accent); color: white; border: none; padding: 8px 16px; border-radius: 8px; font-weight: bold; cursor: pointer; margin-left: 10px; }
.close-modal { float: right; font-size: 24px; cursor: pointer; color: var(--text-muted); }