/* Telegram-inspired light theme, soft blue accents. Dark mode via [data-theme=dark]. */
:root{
  --bg:#e7ebf0; --panel:#fff; --side:#fff; --ink:#222b33; --muted:#707991;
  --accent:#2aabee; --accent-dark:#229ed9; --danger:#e53935;
  --bubble-in:#fff; --bubble-out:#e3f2fd; --tick-read:#2aabee;
  --border:#e3e7ec; --shadow:0 1px 2px rgba(16,35,47,.08);
  --radius:12px; --font:16px/1.45 -apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
[data-theme=dark]{
  --bg:#0e1621; --panel:#17212b; --side:#17212b; --ink:#e8edf2; --muted:#8a99a8;
  --accent:#2aabee; --accent-dark:#229ed9;
  --bubble-in:#182533; --bubble-out:#2b5278; --tick-read:#5fc9f8;
  --border:#232e3c; --shadow:0 1px 2px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:var(--font)}
.hidden{display:none!important}
button{font:inherit;cursor:pointer}
button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.muted{color:var(--muted)}.small{font-size:12px}.err{color:var(--danger);min-height:1.2em}
.primary{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:10px 18px;font-weight:600}
.primary:hover{background:var(--accent-dark)}
.ghost{background:transparent;border:1px solid var(--border);color:var(--ink);border-radius:10px;padding:8px 14px}
.danger{background:var(--danger);color:#fff;border:none;border-radius:10px;padding:8px 14px}
.icon-btn{background:transparent;border:none;font-size:18px;padding:8px;border-radius:50%;line-height:1;color:var(--ink)}
.icon-btn:hover{background:rgba(127,140,153,.15)}
.danger-ghost{color:var(--danger)}
.row{display:flex;align-items:center;gap:8px;margin:6px 0}
.gap{gap:8px}

/* login */
.view{min-height:100dvh;display:flex}
#view-login{align-items:center;justify-content:center;padding:16px}
.login-card{background:var(--panel);padding:32px;border-radius:16px;max-width:400px;width:100%;box-shadow:var(--shadow)}
.brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.logo{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#6ec6f5);color:#fff;font-size:20px}
.login-card h1{font-size:20px;margin:0}
.login-card p{margin:4px 0 0}
.login-card label{display:block;margin:12px 0;font-size:14px}
.login-card input{width:100%;margin-top:4px;padding:11px 12px;border-radius:10px;border:1px solid var(--border);background:var(--panel);color:var(--ink)}
#btn-login{width:100%;margin-top:6px}

/* main two-column */
#view-chat{flex:1;align-items:stretch;justify-content:flex-start;padding:0;max-width:1200px;margin:0 auto;height:100dvh;background:var(--panel)}
#sidebar{width:340px;min-width:300px;border-right:1px solid var(--border);background:var(--side);display:flex;flex-direction:column;padding:12px;gap:10px}
.me-card{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius);background:var(--bg)}
.me-info{flex:1;display:flex;flex-direction:column}
.avatar{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#7b9ff5,#2aabee);color:#fff;font-weight:700;font-size:18px;flex:none}
.avatar.sm{width:38px;height:38px;font-size:16px}
.search-row input{width:100%;padding:9px 14px;border-radius:99px;border:1px solid var(--border);background:var(--bg);color:var(--ink)}
#conv-list{display:flex;flex-direction:column;gap:4px;overflow:auto}
.conv{display:flex;gap:10px;align-items:center;text-align:left;background:transparent;border:none;border-radius:var(--radius);padding:10px;width:100%;color:var(--ink)}
.conv:hover{background:rgba(127,140,153,.12)}
.conv.active{background:var(--accent);color:#fff}
.conv.active .muted{color:rgba(255,255,255,.85)}
.conv-main{flex:1;min-width:0}
.conv-top,.conv-sub{display:flex;justify-content:space-between;align-items:center;gap:8px}
#conv-preview{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:180px}
.badge{background:var(--accent);color:#fff;border-radius:99px;min-width:22px;height:22px;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;padding:0 6px}
.conv.active .badge{background:#fff;color:var(--accent)}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:8px}
#security-box{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding:8px 10px;border:1px solid var(--border);border-radius:10px}
#diag:empty{display:none}

/* chat panel */
#chat{flex:1;display:flex;flex-direction:column;min-width:0;position:relative;background:var(--bg)}
#topbar{display:flex;align-items:center;gap:10px;padding:8px 14px;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:5}
#btn-back{display:none}
.peer-info{flex:1;min-width:0}
.peer-row{display:flex;align-items:center;gap:6px}
.pill{font-size:11px;background:#dcfce7;color:#166534;border-radius:99px;padding:1px 7px}
[data-theme=dark] .pill{background:#14532d;color:#bbf7d0}
.top-actions{display:flex;gap:2px;align-items:center}
.top-actions select{border:1px solid var(--border);border-radius:8px;padding:7px;background:var(--panel);color:var(--ink)}
.conn{background:#fef3c7;color:#92400e;text-align:center;font-size:13px;padding:5px}
.conn.warn{background:#fee2e2;color:#991b1b}
#timeline{flex:1;overflow-y:auto;padding:16px 16px 8px;display:flex;flex-direction:column;gap:4px;scroll-behavior:smooth}
.day-sep{align-self:center;background:rgba(127,140,153,.25);color:var(--muted);font-size:12px;border-radius:99px;padding:3px 12px;margin:8px 0}
.msg{max-width:min(70%,520px);padding:8px 12px;border-radius:14px;background:var(--bubble-in);box-shadow:var(--shadow);position:relative;overflow-wrap:anywhere;align-self:flex-start;border-top-left-radius:4px}
.msg.mine{align-self:flex-end;background:var(--bubble-out);border-top-left-radius:14px;border-top-right-radius:4px}
.msg .body{white-space:pre-wrap}
.msg .quote{font-size:13px;color:var(--muted);border-left:2px solid var(--accent);padding-left:8px;margin-bottom:4px}
.msg .meta{display:flex;justify-content:flex-end;gap:5px;font-size:11px;color:var(--muted);margin-top:2px;align-items:center}
.ticks{color:var(--muted)}.ticks.read{color:var(--tick-read)}
.msg .acts{display:flex;gap:2px;margin-top:2px;opacity:0;transition:.15s}
.msg:hover .acts,.msg:focus-within .acts{opacity:1}
.acts button{background:none;border:none;color:var(--muted);font-size:12px;padding:3px 6px;border-radius:6px}
.acts button:hover{background:rgba(127,140,153,.2)}
.msg .reacts{display:flex;gap:4px;margin-top:4px;flex-wrap:wrap}
.msg .reacts span{background:rgba(127,140,153,.18);border-radius:99px;padding:1px 8px;font-size:13px;cursor:pointer}
.react-quick{position:absolute;top:-38px;right:0;display:flex;gap:2px;background:var(--panel);border:1px solid var(--border);border-radius:99px;padding:3px 6px;box-shadow:var(--shadow);z-index:8}
.msg.mine .react-quick{right:auto;left:0}
.react-quick button{background:none;border:none;font-size:18px;padding:2px 4px;border-radius:50%}
.react-quick button:hover{background:rgba(127,140,153,.2)}
.msg img{max-width:100%;border-radius:8px}
.msg video{max-width:100%;border-radius:8px}
.msg.emoji-only{font-size:34px;background:transparent;box-shadow:none}
.msg.failed{outline:1px solid var(--danger)}
.retry{background:none;border:1px solid var(--danger);color:var(--danger);border-radius:8px;font-size:12px;padding:2px 8px}
#empty-state{text-align:center;color:var(--muted);padding:40px 0}
.empty-art{font-size:48px}
#scroll-bottom{position:absolute;right:18px;bottom:150px;width:42px;height:42px;border-radius:50%;border:1px solid var(--border);background:var(--panel);box-shadow:var(--shadow);font-size:18px}
#typing{padding:2px 16px}
#reply-bar{display:flex;justify-content:space-between;align-items:center;background:#fef9c3;color:#854d0e;padding:6px 12px;font-size:13px}
[data-theme=dark] #reply-bar{background:#3b2f12;color:#fde68a}
#emoji-panel{max-height:230px;overflow:auto;background:var(--panel);border-top:1px solid var(--border);padding:8px}
#emoji-panel .cat{font-size:12px;color:var(--muted);margin:6px 0 2px}
#emoji-panel button{background:none;border:none;font-size:24px;padding:4px;border-radius:8px}
#composer{display:flex;gap:6px;padding:10px 12px;background:var(--panel);border-top:1px solid var(--border);align-items:flex-end;position:sticky;bottom:0}
#input{flex:1;padding:10px 14px;border-radius:14px;border:1px solid var(--border);background:var(--bg);color:var(--ink);resize:none;font:inherit;max-height:120px}
#btn-send{border-radius:50%;width:44px;height:44px;padding:0;font-size:18px;flex:none}
#btn-send.sending{opacity:.6;pointer-events:none}
/* voice recording bar */
#record-bar{display:flex;gap:10px;align-items:center;padding:10px 12px;background:var(--panel);border-top:1px solid var(--border);position:sticky;bottom:0}
#rec-dot{color:var(--danger);font-size:12px}
#rec-dot.blink{animation:blink 1s infinite}
@keyframes blink{50%{opacity:.2}}
#rec-time{font-variant-numeric:tabular-nums;font-size:13px;min-width:44px}
#rec-wave{flex:1;height:32px;max-width:220px}
/* stickers */
#sticker-panel{max-height:240px;overflow:auto;background:var(--panel);border-top:1px solid var(--border);padding:8px}
#sticker-panel .cat{font-size:12px;color:var(--muted);margin:6px 0 2px}
.sticker-row{display:flex;flex-wrap:wrap;gap:4px}
.sticker{background:none;border:none;font-size:32px;padding:4px;border-radius:10px;line-height:1}
.sticker:hover{background:rgba(127,140,153,.15)}
.msg.sticker-msg{background:transparent!important;box-shadow:none;font-size:64px;line-height:1;padding:2px}
.msg.sticker-msg .acts,.msg.sticker-msg .meta{opacity:.9}
/* voice player */
.voice-player{display:flex;align-items:center;gap:8px;min-width:200px;margin-top:4px}
.vp-play{width:38px;height:38px;border-radius:50%;border:none;background:var(--accent);color:#fff;font-size:15px;flex:none}
.vp-bar{flex:1;height:34px;border-radius:8px;background:linear-gradient(to right,var(--accent) var(--p,0%),rgba(127,140,153,.25) var(--p,0%));cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:0 8px;color:#fff;font-size:11px;font-variant-numeric:tabular-nums}
.vp-bar .vp-dur{opacity:.85}
.vp-rate{border:1px solid var(--border);border-radius:8px;background:var(--panel);color:var(--ink);font-size:12px;padding:6px 8px;flex:none}

/* call overlay */
#call-overlay{position:fixed;inset:0;background:#0e1621;color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:50;gap:10px}
#remote-video{width:min(720px,94vw);max-height:56dvh;background:#000;border-radius:12px}
#local-video{width:130px;position:absolute;top:14px;right:14px;border-radius:10px;background:#000}
#call-info{text-align:center}
#call-controls{display:flex;gap:12px;margin-top:6px}
#call-controls button{background:#263445;color:#fff;border:none;border-radius:50%;width:54px;height:54px;font-size:20px}
#call-end{background:var(--danger)!important}
#call-incoming{display:flex;gap:12px;margin-top:6px}
#call-incoming button{min-width:120px}

/* settings */
#settings{position:fixed;top:0;right:0;bottom:0;width:min(380px,94vw);background:var(--panel);padding:18px;overflow:auto;z-index:40;box-shadow:-8px 0 30px rgba(0,0,0,.15)}
.set-head{display:flex;justify-content:space-between;align-items:center}
#settings h3{margin:16px 0 6px;font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
#safety{white-space:pre-wrap;font-size:13px;background:var(--bg);padding:10px;border-radius:8px}
#pinned-bar{display:flex;justify-content:space-between;align-items:center;background:var(--panel);border-bottom:1px solid var(--border);padding:6px 12px;font-size:13px;cursor:pointer}
#pinned-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#select-bar{display:flex;gap:8px;align-items:center;background:var(--panel);border-bottom:1px solid var(--border);padding:6px 12px;font-size:13px}
#select-bar .danger,#select-bar .ghost{padding:5px 12px;font-size:13px}
.msg .sel-box{display:none;margin-right:8px}
body.selecting .msg .sel-box{display:inline-block}
body.selecting .msg .acts{display:none}
#lock-screen{position:fixed;inset:0;background:rgba(10,15,22,.72);z-index:100;display:flex;align-items:center;justify-content:center;padding:16px}
#vault-screen{position:fixed;inset:0;background:rgba(10,15,22,.88);z-index:110;display:flex;align-items:center;justify-content:center;padding:16px}
#vault-screen .card{background:var(--panel);padding:28px;border-radius:16px;max-width:340px;width:100%}
#vault-screen input{width:100%;padding:10px;border-radius:8px;border:1px solid var(--border);background:inherit;color:inherit}
#vault-screen button{width:100%;margin-top:8px}
body.vault-locked #timeline,body.vault-locked #composer,body.vault-locked #pinned-bar{filter:blur(14px);pointer-events:none;user-select:none}
.filter-row{display:flex;gap:6px;padding:0 2px 4px;flex-wrap:wrap}
.filter-row.date-range{align-items:center;gap:8px}
.filter-row.date-range label{display:flex;align-items:center;gap:4px}
.filter-row.date-range input[type=date]{padding:4px 6px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--ink);font-size:12px}
.strict-on #secwarn{}
.chip{background:var(--bg);border:1px solid var(--border);color:var(--ink);border-radius:99px;padding:5px 12px;font-size:12px}
.chip.active{background:var(--accent);color:#fff;border-color:var(--accent)}
#btn-saved.on{background:var(--accent);color:#fff;border-color:var(--accent)}
#search-results{max-height:200px;overflow:auto;display:flex;flex-direction:column;gap:2px}
.sr-item{text-align:left;background:transparent;border:none;border-bottom:1px solid var(--border);padding:8px;color:var(--ink);font-size:13px}
.sr-item:hover{background:rgba(127,140,153,.12)}
.sr-item mark{background:#fef08a;color:inherit;border-radius:3px}
.msg.flash{animation:flash 1.6s}
@keyframes flash{0%,40%{outline:2px solid var(--accent)}100%{outline:none}}
.fwd{font-size:12px;color:var(--muted);font-style:italic}
.translation{font-size:14px;background:rgba(127,140,153,.12);border-radius:8px;padding:6px 8px;margin-top:4px}
.transcript{font-size:13px;background:rgba(127,140,153,.12);border-radius:8px;padding:6px 8px;margin-top:4px}
.machine-tag{font-size:11px;color:var(--muted)}
/* appearance prefs */
body[data-bubble=green]{--bubble-out:#dcf8c6}
body[data-bubble=purple]{--bubble-out:#e9defb}
body[data-bubble=grey]{--bubble-out:#eef1f4}
body[data-theme=dark][data-bubble=green]{--bubble-out:#14432f}
body[data-fs=small]{font-size:14px}
body[data-fs=large]{font-size:18px}
#lock-screen .card{background:var(--panel);padding:28px;border-radius:16px;max-width:340px;width:100%}
#lock-screen input{width:100%;padding:10px;border-radius:8px;border:1px solid var(--border);background:inherit;color:inherit}
#lock-screen button{width:100%;margin-top:8px}
/* wallpapers */
#timeline[data-wall="night"]{background:linear-gradient(160deg,#1b2a4a,#0e1621)}
#timeline[data-wall="sand"]{background:linear-gradient(160deg,#f5e6c8,#e8d3a8)}
#timeline[data-wall="mint"]{background:linear-gradient(160deg,#d9f2e3,#bfe6d2)}
[data-theme=dark] #timeline[data-wall="sand"]{background:linear-gradient(160deg,#3a3226,#242019)}
[data-theme=dark] #timeline[data-wall="mint"]{background:linear-gradient(160deg,#1d2f28,#121e1a)}
#settings input[type=password],#settings input[type=text]{width:100%;padding:8px;border-radius:8px;border:1px solid var(--border);background:inherit;color:inherit}
#settings select{padding:7px;border-radius:8px;border:1px solid var(--border);background:var(--panel);color:var(--ink)}
.sys-row{align-self:center;font-size:12px;color:var(--muted);background:rgba(127,140,153,.18);border-radius:99px;padding:3px 12px;margin:4px 0}
#toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:#222b33;color:#fff;padding:10px 18px;border-radius:12px;opacity:0;transition:.2s;z-index:60;max-width:90vw}
#toast.show{opacity:1}

/* responsive */
@media (max-width:760px){
  #sidebar{position:fixed;inset:0 auto 0 0;width:min(340px,88vw);z-index:30;transform:translateX(-105%);transition:.2s;box-shadow:8px 0 30px rgba(0,0,0,.15)}
  body.nav-open #sidebar{transform:none}
  #btn-back{display:inline-block}
  #view-chat{max-width:none}
  .msg{max-width:86%}
  .top-actions .icon-btn{font-size:16px;padding:6px}
}