:root {
    --bg: #1E1E1E;
    --card: #2C2C2C;
    --accent: #C6B06A;
    --text: #EBEBEB;
    --text-sec: #A3A0A0;
    --border: #3A3A3A;
}
body.light-theme {
    --bg: #F5F5F5;
    --card: #FFFFFF;
    --text: #1E1E1E;
    --text-sec: #6B6B6B;
    --border: #E0E0E0;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); height: 100vh; overflow: hidden; transition: 0.3s; }
.screen { display: none; height: 100vh; width: 100%; background: var(--bg); }
.screen.active { display: flex; flex-direction: column; }
.login-card { background: var(--card); border-radius: 24px; padding: 32px; margin: auto; width: 90%; max-width: 400px; }
.logo { font-size: 32px; font-weight: 700; color: var(--accent); text-align: center; margin-bottom: 16px; }
.network-status { text-align: center; font-size: 12px; color: var(--text-sec); margin-bottom: 24px; padding: 8px; background: var(--bg); border-radius: 12px; }
.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-size: 13px; color: var(--text-sec); margin-bottom: 6px; }
.input-group input { width: 100%; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; color: var(--text); }
.code-group { display: flex; gap: 8px; }
.code-group input { flex: 1; }
.btn-primary { width: 100%; padding: 12px; background: var(--accent); color: var(--bg); border: none; border-radius: 12px; font-weight: 600; cursor: pointer; }
.btn-icon { padding: 10px 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; cursor: pointer; }
.btn-danger { width: 100%; padding: 12px; background: var(--accent); color: var(--bg); border: none; border-radius: 12px; cursor: pointer; margin-top: 12px; }
.error-message { color: var(--text-sec); font-size: 12px; text-align: center; }
.hint { font-size: 11px; color: var(--text-sec); text-align: center; margin-top: 8px; }
.app-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; background: var(--card); border-bottom: 1px solid var(--border); }
.app-logo { font-size: 22px; font-weight: 700; color: var(--accent); }
.header-right { display: flex; align-items: center; gap: 12px; }
.theme-toggle-btn { background: none; border: none; font-size: 20px; cursor: pointer; }
.connection-status { display: flex; align-items: center; gap: 6px; }
.status-dot { width: 8px; height: 8px; background: #6B8C5C; border-radius: 50%; }
.filter-tabs { display: flex; gap: 8px; padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border); justify-content: center; }
.filter-tab { padding: 6px 16px; background: none; border: none; color: var(--text-sec); cursor: pointer; border-radius: 20px; }
.filter-tab.active { background: var(--accent); color: var(--bg); }
.search-bar { display: flex; align-items: center; gap: 10px; padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border); }
.search-bar input { flex: 1; background: none; border: none; color: var(--text); }
.connection-panel { padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border); }
.bottom-nav { display: flex; background: var(--card); border-top: 1px solid var(--border); padding: 8px 16px; }
.nav-btn { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; background: none; border: none; color: var(--text-sec); cursor: pointer; padding: 8px; }
.nav-btn.active { color: var(--accent); }
.nav-btn span:first-child { font-size: 20px; }
.nav-btn span:last-child { font-size: 11px; }
.content-area { flex: 1; overflow-y: auto; padding: 16px; }
.view { display: none; }
.view.active { display: block; }
.info-card { background: var(--card); border-radius: 16px; padding: 16px; margin-bottom: 16px; border: 1px solid var(--border); }
.info-card h3 { margin-bottom: 12px; font-size: 16px; }
.info-row { display: flex; justify-content: space-between; margin-bottom: 12px; }
.crypto-value { font-family: monospace; font-size: 11px; background: var(--bg); padding: 6px 10px; border-radius: 8px; color: var(--accent); }
.chats-list, .peers-list, .groups-list { display: flex; flex-direction: column; gap: 8px; }
.chat-item, .peer-item, .group-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: var(--card); border-radius: 12px; cursor: pointer; border: 1px solid var(--border); }
.chat-item:hover, .peer-item:hover { border-color: var(--accent); }
.chat-name, .peer-name { font-weight: 600; }
.chat-preview, .peer-id { font-size: 11px; color: var(--text-sec); }
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: var(--bg); z-index: 1000; flex-direction: column; }
.modal.active { display: flex; }
.chat-header-modal { display: flex; align-items: center; gap: 16px; padding: 16px; background: var(--card); border-bottom: 1px solid var(--border); }
.back-btn { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text); }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.message { display: flex; margin-bottom: 4px; }
.message.incoming { justify-content: flex-start; }
.message.outgoing { justify-content: flex-end; }
.message-bubble { max-width: 75%; padding: 8px 12px; border-radius: 16px; }
.message.incoming .message-bubble { background: var(--card); border: 1px solid var(--border); }
.message.outgoing .message-bubble { background: var(--accent); color: var(--bg); }
.message-text { font-size: 14px; }
.message-time { font-size: 9px; margin-top: 4px; color: var(--text-sec); }
.message-input-area { display: flex; gap: 12px; padding: 12px 16px; background: var(--card); border-top: 1px solid var(--border); }
.message-input-area input { flex: 1; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 24px; color: var(--text); }
.send-btn { width: 44px; height: 44px; background: var(--accent); border: none; border-radius: 44px; cursor: pointer; font-size: 20px; }
.empty-state { text-align: center; padding: 40px; color: var(--text-sec); }
@media (max-width: 600px) { .code-group { flex-direction: column; } .code-group button { width: 100%; } }