:root{
  --purple-900:#1a0b2e;
  --purple-800:#241041;
  --purple-700:#2f1557;
  --purple-600:#4a1d8a;
  --purple-500:#6d28d9;
  --purple-400:#8b5cf6;
  --purple-300:#a78bfa;
  --purple-200:#c4b5fd;
  --purple-100:#ede9fe;
  --accent:#b026ff;
  --bubble-out:#6d28d9;
  --bubble-in:#2f1557;
  --bg:#0f0620;
  --panel:#1a0b2e;
  --text:#f3e8ff;
  --muted:#a78bfa;
  --danger:#ff4d6d;
  --warn:#ffb020;
  --ok:#22c55e;
  --radius:16px;
  --shadow:0 8px 30px rgba(109,40,217,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:'Segoe UI',system-ui,-apple-system,sans-serif;
  background:radial-gradient(1200px 800px at 20% -10%,#3b0f6e 0%,var(--bg) 55%);
  color:var(--text);overflow:hidden;
}
.app{display:grid;grid-template-columns:340px 1fr;height:100vh}

/* ---------- Sidebar ---------- */
.sidebar{background:var(--panel);border-right:1px solid rgba(139,92,246,.2);display:flex;flex-direction:column;min-width:0}
.brand{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid rgba(139,92,246,.15)}
.logo{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--purple-500),var(--accent));display:grid;place-items:center;font-size:22px;box-shadow:var(--shadow)}
.brand h1{font-size:18px;letter-spacing:.3px}
.brand small{color:var(--muted);font-size:11px;display:block}
.tabs{display:flex;gap:6px;padding:12px 14px}
.tab{flex:1;padding:9px;border-radius:10px;background:transparent;border:1px solid rgba(139,92,246,.25);color:var(--muted);cursor:pointer;font-size:12px;font-weight:600;transition:.2s}
.tab.active{background:linear-gradient(135deg,var(--purple-600),var(--purple-500));color:#fff;border-color:transparent}
.tab:hover{color:#fff}
.search{padding:0 14px 10px}
.search input{width:100%;padding:10px 14px;border-radius:10px;border:1px solid rgba(139,92,246,.25);background:rgba(255,255,255,.04);color:var(--text);outline:none}
.search input:focus{border-color:var(--purple-400)}
.list{flex:1;overflow-y:auto;padding:6px 8px}
.chat-item{display:flex;gap:12px;padding:12px;border-radius:12px;cursor:pointer;transition:.15s;align-items:center}
.chat-item:hover{background:rgba(139,92,246,.12)}
.chat-item.active{background:rgba(139,92,246,.2)}
.avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--purple-400),var(--accent));display:grid;place-items:center;font-weight:700;flex-shrink:0}
.chat-meta{flex:1;min-width:0}
.chat-meta .name{font-weight:600;font-size:14px}
.chat-meta .last{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badge{background:var(--accent);color:#fff;font-size:11px;padding:2px 7px;border-radius:10px;font-weight:700}

/* ---------- Main ---------- */
.main{display:flex;flex-direction:column;min-width:0;background:linear-gradient(180deg,rgba(26,11,46,.6),rgba(15,6,32,.9))}
.topbar{display:flex;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid rgba(139,92,246,.15);background:rgba(26,11,46,.7);backdrop-filter:blur(8px)}
.topbar .name{font-weight:700}
.topbar .status{font-size:12px;color:var(--ok)}
.topbar .spacer{flex:1}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid rgba(139,92,246,.25);background:rgba(255,255,255,.03);color:var(--purple-200);cursor:pointer;font-size:16px;display:grid;place-items:center;transition:.2s}
.icon-btn:hover{background:rgba(139,92,246,.2);color:#fff}
.icon-btn.on{background:linear-gradient(135deg,var(--purple-500),var(--accent));color:#fff;border-color:transparent}

.messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:10px}
.msg{max-width:62%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.45;position:relative;word-wrap:break-word;animation:pop .18s ease}
@keyframes pop{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.out{align-self:flex-end;background:linear-gradient(135deg,var(--purple-600),var(--purple-500));border-bottom-right-radius:4px}
.msg.in{align-self:flex-start;background:var(--bubble-in);border-bottom-left-radius:4px}
.msg .time{font-size:10px;color:rgba(255,255,255,.6);margin-top:4px;text-align:right}
.msg .lock{font-size:10px;color:var(--purple-200);margin-right:4px}
.msg.flagged{outline:2px solid var(--danger);outline-offset:2px}
.msg .flag{position:absolute;top:-9px;right:8px;background:var(--danger);color:#fff;font-size:9px;padding:2px 6px;border-radius:8px;font-weight:700}

.composer{display:flex;gap:10px;padding:14px 20px;border-top:1px solid rgba(139,92,246,.15);background:rgba(26,11,46,.7)}
.composer input{flex:1;padding:12px 16px;border-radius:24px;border:1px solid rgba(139,92,246,.25);background:rgba(255,255,255,.04);color:var(--text);outline:none}
.composer input:focus{border-color:var(--purple-400)}
.send{width:48px;height:48px;border-radius:50%;border:none;background:linear-gradient(135deg,var(--purple-500),var(--accent));color:#fff;font-size:18px;cursor:pointer;box-shadow:var(--shadow)}
.send:hover{filter:brightness(1.1)}

/* ---------- Panels (VPN / Agents) ---------- */
.panel-view{flex:1;overflow-y:auto;padding:28px}
.panel-view h2{font-size:22px;margin-bottom:6px}
.panel-view .sub{color:var(--muted);font-size:13px;margin-bottom:22px}
.card{background:rgba(255,255,255,.03);border:1px solid rgba(139,92,246,.2);border-radius:var(--radius);padding:20px;margin-bottom:16px}
.card h3{font-size:15px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid rgba(139,92,246,.1)}
.row:last-child{border-bottom:none}
.row .label{font-size:13px}
.row .val{font-size:12px;color:var(--muted);font-family:monospace}
.switch{position:relative;width:48px;height:26px;flex-shrink:0}
.switch input{opacity:0;width:0;height:0}
.slider{position:absolute;inset:0;background:#3b2a5a;border-radius:26px;cursor:pointer;transition:.25s}
.slider:before{content:"";position:absolute;width:20px;height:20px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.25s}
input:checked+.slider{background:linear-gradient(135deg,var(--purple-500),var(--accent))}
input:checked+.slider:before{transform:translateX(22px)}
.btn{padding:11px 18px;border-radius:10px;border:none;background:linear-gradient(135deg,var(--purple-600),var(--purple-500));color:#fff;font-weight:600;cursor:pointer;font-size:13px}
.btn:hover{filter:brightness(1.1)}
.btn.ghost{background:transparent;border:1px solid rgba(139,92,246,.35);color:var(--purple-200)}
.btn.danger{background:linear-gradient(135deg,#b91c4b,var(--danger))}
textarea{width:100%;min-height:90px;padding:12px;border-radius:10px;border:1px solid rgba(139,92,246,.25);background:rgba(255,255,255,.04);color:var(--text);outline:none;font-family:inherit;resize:vertical}
textarea:focus{border-color:var(--purple-400)}
pre{background:#0b0418;border:1px solid rgba(139,92,246,.2);border-radius:10px;padding:14px;overflow-x:auto;font-size:12px;color:var(--purple-200);white-space:pre-wrap;word-break:break-all}

.agent-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.agent-card{background:rgba(255,255,255,.03);border:1px solid rgba(139,92,246,.2);border-radius:var(--radius);padding:16px;cursor:pointer;transition:.2s}
.agent-card:hover{border-color:var(--purple-400);transform:translateY(-2px)}
.agent-card .ico{font-size:26px;margin-bottom:8px}
.agent-card .t{font-weight:700;font-size:14px}
.agent-card .d{color:var(--muted);font-size:12px;margin-top:4px}

.result{margin-top:14px}
.pill{display:inline-block;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700;margin:3px 4px 3px 0}
.pill.high{background:rgba(255,77,109,.2);color:#ff8fa3;border:1px solid var(--danger)}
.pill.med{background:rgba(255,176,32,.2);color:#ffd27a;border:1px solid var(--warn)}
.pill.low{background:rgba(34,197,94,.2);color:#7ee2a8;border:1px solid var(--ok)}
.meter{height:10px;border-radius:6px;background:#2a1a45;overflow:hidden;margin:8px 0}
.meter>div{height:100%;border-radius:6px;transition:width .4s}

.empty{display:grid;place-items:center;height:100%;color:var(--muted);text-align:center;gap:10px}
.empty .big{font-size:52px}
.hidden{display:none!important}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-thumb{background:rgba(139,92,246,.35);border-radius:8px}

/* ---------- Modals ---------- */
.modal{position:fixed;inset:0;background:rgba(8,3,18,.82);backdrop-filter:blur(6px);display:grid;place-items:center;z-index:100;padding:20px}
.modal-box{background:linear-gradient(180deg,var(--purple-800),var(--purple-900));border:1px solid rgba(139,92,246,.35);border-radius:20px;padding:28px;max-width:460px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,.6)}
.modal-box.wide{max-width:760px}
.modal-box h2{font-size:20px;margin-bottom:8px}
.modal-box .sub{color:var(--muted);font-size:13px;margin-bottom:18px;line-height:1.5}
.paperkey{font-family:'Courier New',monospace;font-size:26px;letter-spacing:3px;text-align:center;padding:20px;background:#0b0418;border:1px dashed var(--purple-400);border-radius:12px;color:var(--purple-200);margin-bottom:0;
  user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;transition:filter .15s}
.paperkey.blurred{filter:blur(14px) saturate(0);color:transparent;text-shadow:0 0 0 rgba(196,181,253,.001)}
.no-select{user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.paperkey-guard{position:relative;margin-bottom:10px;border-radius:12px;overflow:hidden}
.paperkey-cover{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  background:rgba(11,4,24,.72);backdrop-filter:blur(2px);border-radius:12px;cursor:pointer;
  border:1px solid rgba(139,92,246,.35);transition:opacity .15s;-webkit-user-select:none;user-select:none;touch-action:none}
.paperkey-cover .pk-lock{font-size:26px}
.paperkey-cover .pk-hint{font-size:13px;font-weight:700;color:var(--purple-100)}
.paperkey-cover .pk-hint-sub{font-size:10.5px;color:var(--muted);text-align:center;padding:0 18px;line-height:1.4}
.paperkey-guard.revealed .paperkey-cover{opacity:0}
.pk-warn{background:rgba(255,77,109,.12);border:1px solid var(--danger);color:#ff8fa3;font-size:11.5px;border-radius:8px;padding:8px 10px;margin-bottom:10px;text-align:center}
.pk-eye{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;font-size:16px;padding:4px;color:var(--muted)}
.keyinput-wrap{position:relative}
.invite-qr{display:flex;justify-content:center;align-items:center;background:#fff;border-radius:14px;padding:16px}
.invite-qr svg{width:220px;height:220px;display:block}
#inviteScanCanvas{display:none}
.keyinput{width:100%;padding:14px;font-family:'Courier New',monospace;font-size:20px;letter-spacing:3px;text-align:center;border-radius:12px;border:1px solid rgba(139,92,246,.35);background:rgba(255,255,255,.05);color:var(--text);outline:none;margin-bottom:8px}
.keyinput:focus{border-color:var(--purple-400)}
.viewer-body{min-height:220px;display:grid;place-items:center;background:#0b0418;border-radius:12px;margin:14px 0;overflow:hidden;position:relative}
.viewer-body img{max-width:100%;max-height:60vh;display:block}
.viewer-body .watermark{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;color:rgba(255,255,255,.08);font-size:40px;font-weight:800;transform:rotate(-25deg)}
.file-chip{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:12px;background:rgba(139,92,246,.15);border:1px solid rgba(139,92,246,.3);cursor:pointer;margin-top:4px}
.file-chip .fi{font-size:22px}
.file-chip .fn{font-size:13px;font-weight:600}
.file-chip .fs{font-size:11px;color:var(--muted)}
.file-chip .lock{font-size:11px;color:var(--purple-200)}
.revoked{opacity:.5;text-decoration:line-through}

/* ============================================================
   MOBILE / iOS  (iPhone, Android phones)
   ============================================================ */
.back-btn{display:none}

@media (max-width: 820px){
  html,body{height:100%;overflow:hidden}
  .app{grid-template-columns:1fr;height:100vh;height:100dvh}

  /* Sidebar (chat list) and main are full-screen; we toggle between them */
  .sidebar{grid-column:1;grid-row:1;height:100vh;height:100dvh;border-right:none}
  .main{grid-column:1;grid-row:1;height:100vh;height:100dvh}

  /* Default: show the list, hide the chat */
  .main{display:none}
  body.show-main .sidebar{display:none}
  body.show-main .main{display:flex}

  /* Back button visible on mobile */
  .back-btn{display:grid;font-size:24px;line-height:1;padding-bottom:4px}

  /* Safe areas (notch + home indicator) */
  .brand{padding-top:calc(18px + env(safe-area-inset-top))}
  .topbar{padding-top:calc(14px + env(safe-area-inset-top))}
  .composer{padding-bottom:calc(14px + env(safe-area-inset-bottom))}
  .panel-view{padding-bottom:calc(28px + env(safe-area-inset-bottom))}
  .list{padding-bottom:calc(6px + env(safe-area-inset-bottom))}

  /* Bigger touch targets */
  .tab{padding:11px 8px}
  .icon-btn{width:42px;height:42px}
  .send{width:50px;height:50px}

  /* Prevent iOS zoom-on-focus (needs >=16px) */
  input,textarea,select{font-size:16px!important}

  /* Messages use more width on small screens */
  .msg{max-width:82%}
  .messages{padding:16px}

  /* Modals fill more of the screen */
  .modal{padding:12px;align-items:flex-end}
  .modal-box{padding:22px;max-height:92vh;max-height:92dvh;overflow-y:auto}
  .paperkey{font-size:22px;letter-spacing:2px}
  .keyinput{font-size:18px}
}

/* iOS polish (all sizes) */
*{-webkit-tap-highlight-color:transparent}
button,.tab,.chat-item,.icon-btn,.btn,.agent-card,.file-chip{touch-action:manipulation}
.list,.messages,.panel-view{-webkit-overflow-scrolling:touch}
input:not([type=checkbox]):not([type=radio]),textarea{-webkit-appearance:none;border-radius:10px}

/* Checkboxes/radios: iOS Safari hides the native tick when appearance:none
   is applied with no replacement style, so give them an explicit visible box.
   (Excludes .switch toggles, which use their own opacity:0 + .slider style.) */
input[type=checkbox]:not(.switch input),input[type=radio]:not(.switch input){
  -webkit-appearance:none;appearance:none;
  width:22px;height:22px;min-width:22px;
  border:2px solid #a78bfa;border-radius:6px;
  background:#241a3d;
  display:inline-block;vertical-align:middle;
  position:relative;cursor:pointer;flex-shrink:0;
  margin:0 8px 0 0;
}
input[type=radio]:not(.switch input){border-radius:50%}
input[type=checkbox]:not(.switch input):checked,input[type=radio]:not(.switch input):checked{
  background:#8b5cf6;border-color:#8b5cf6;
}
input[type=checkbox]:not(.switch input):checked::after{
  content:'';position:absolute;left:6px;top:2px;
  width:6px;height:11px;
  border:solid #fff;border-width:0 2px 2px 0;
  transform:rotate(45deg);
}
input[type=radio]:not(.switch input):checked::after{
  content:'';position:absolute;left:5px;top:5px;
  width:8px;height:8px;border-radius:50%;background:#fff;
}
label:has(> input[type=checkbox]:not(.switch input)){
  display:flex;align-items:center;gap:2px;cursor:pointer;
}
/* Restore the toggle-switch's own hidden-input sizing (must win over the rule above). */
.switch input{opacity:0!important;width:0!important;height:0!important;min-width:0!important;margin:0!important;border:none!important}