:root{--accent:#0866ff;--bg:#f7f9fc;--panel:#fff;--text:#111827;--muted:#64748b;--border:#dbe3ef;--sidebar:#061426;--sidebar2:#0b1e35;--incoming:#eef1f6;--shadow:0 10px 30px rgba(15,23,42,.08)}
*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:Inter,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text)}button,input,textarea,select{font:inherit}button{cursor:pointer}.app{height:100%;display:grid;grid-template-columns:330px 1fr}.sidebar{background:linear-gradient(180deg,#061426,#07101e);color:#fff;padding:22px 18px;display:flex;flex-direction:column;gap:16px;overflow:hidden}.brand{display:flex;gap:14px;align-items:center;padding:0 4px}.brand img{width:62px;height:62px;object-fit:contain}.brand strong{font-size:29px}.brand strong span,.auth-card h1 span{color:var(--accent)}.brand small{display:block;color:#d6deea;margin-top:4px}.new-chat,.primary,.send{background:linear-gradient(135deg,var(--accent),#0a7cff);border:0;color:#fff;border-radius:14px;padding:15px 18px;font-weight:700;box-shadow:0 8px 20px color-mix(in srgb,var(--accent) 28%,transparent)}.sidebar-search,.sidebar input{width:100%;background:#08192c;border:1px solid #33455e;color:#fff;padding:14px 16px;border-radius:13px;outline:none}.sidebar-search:focus{border-color:var(--accent)}.sidebar-search::placeholder{color:#9fb0c7}.conversation-list{display:flex;flex-direction:column;gap:9px;overflow:auto;min-height:0}.conversation{display:grid;grid-template-columns:48px 1fr auto;gap:11px;align-items:center;padding:12px;border-radius:14px;background:#0b1d33;color:#fff;border:1px solid transparent}.conversation:hover{background:#102846}.conversation.active{background:#eef5ff;color:#101828;border-color:#a7c8ff}.conversation .avatar,.chat-header .avatar{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),#1e3a8a);color:#fff;font-weight:800;font-size:20px;flex:0 0 auto}.conversation strong{display:block;color:inherit}.conversation small{display:block;color:#c5d0df;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px;margin-top:4px}.conversation.active small{color:#52637a}.conversation time{font-size:12px;color:#b7c5d8}.conversation.active time{color:#52637a}.sidebar-spacer{flex:1}nav{display:grid;gap:7px}.nav{border:0;background:transparent;color:#fff;text-align:left;padding:13px 14px;border-radius:12px;font-weight:700}.nav:hover,.nav.active{background:#10233c;color:#54a1ff}.network-card{border:1px solid #2b3e56;border-radius:14px;padding:13px;display:flex;align-items:center;gap:12px}.network-card small{display:block;color:#b9c6d7;margin-top:3px}.dot{width:12px;height:12px;border-radius:50%;background:#f59e0b;display:inline-block}.dot.online{background:#16c55d;box-shadow:0 0 12px rgba(22,197,93,.7)}.version{font-size:13px;color:#d8e1ec;display:flex;justify-content:space-between}.version span{color:#91a3ba}.main{min-width:0;display:flex;flex-direction:column;height:100%}.topbar{height:92px;display:flex;align-items:center;justify-content:center;padding:12px 28px;position:relative;background:rgba(255,255,255,.88);border-bottom:1px solid var(--border);backdrop-filter:blur(14px)}.network-pill{border:1px solid #b8c7dc;border-radius:16px;padding:10px 22px;text-align:center;line-height:1.25;background:#fff;box-shadow:var(--shadow)}.network-pill span{display:block;color:#16a34a;font-size:13px;margin-top:3px}.network-pill .dot{width:10px;height:10px;margin-right:6px}.top-actions{position:absolute;right:24px;display:flex;gap:10px}.top-actions button,.ghost{background:#fff;border:1px solid var(--border);border-radius:12px;padding:11px 16px;color:var(--text)}.page{flex:1;min-height:0}.chat-page{display:grid;grid-template-rows:auto 1fr auto;position:relative}.chat-header{background:#fff;border-bottom:1px solid var(--border);padding:14px 22px;display:flex;gap:13px;align-items:center}.chat-header strong{display:block;font-size:18px}.chat-header small{display:block;color:var(--muted);margin-top:3px}.encrypted{margin-left:auto;background:#071426;color:#4ade80;padding:10px 13px;border-radius:10px;font-weight:700}.messages{overflow:auto;padding:24px;display:flex;flex-direction:column;gap:10px;background:#fbfcfe}.empty{margin:auto;text-align:center;color:var(--muted)}.empty>div:first-child{font-size:42px}.message-row{display:flex}.message-row.out{justify-content:flex-end}.bubble{max-width:min(68%,650px);padding:11px 14px;border-radius:16px;background:var(--incoming);color:#172033;box-shadow:0 2px 7px rgba(15,23,42,.05);white-space:pre-wrap;overflow-wrap:anywhere}.message-row.out .bubble{background:linear-gradient(135deg,var(--accent),#0a78f5);color:#fff;border-bottom-right-radius:5px}.message-row.in .bubble{border-bottom-left-radius:5px}.meta{font-size:11px;opacity:.72;margin-top:5px;text-align:right}.file-card{display:grid;grid-template-columns:88px 1fr;gap:14px;min-width:300px}.file-thumb{width:88px;height:88px;border-radius:12px;object-fit:cover;background:#0b1730}.file-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}.file-actions button{border:1px solid color-mix(in srgb,currentColor 25%,transparent);background:transparent;color:inherit;border-radius:8px;padding:6px 9px}.composer{border-top:1px solid var(--border);background:#fff;padding:14px 20px;display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:end}.composer button{border:1px solid var(--border);background:#fff;border-radius:12px;padding:12px}.composer .send{border:0}.composer textarea{resize:none;max-height:140px;border:1px solid var(--border);border-radius:14px;padding:13px;outline:none}.composer textarea:focus{border-color:var(--accent)}.drop-zone{display:none;position:absolute;inset:85px 20px 90px;background:rgba(8,102,255,.12);border:2px dashed var(--accent);border-radius:20px;z-index:5;place-items:center;color:var(--accent);font-size:24px;font-weight:800}.drop-zone.show{display:grid}.panel-page{overflow:auto;padding:26px;background:#f5f8fc}.panel{max-width:850px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:18px;padding:26px;box-shadow:var(--shadow)}.panel label{display:block;font-weight:700;margin:16px 0}.panel input,.panel select{display:block;width:100%;margin-top:7px;border:1px solid var(--border);border-radius:11px;padding:12px;color:#111;background:#fff}.panel .check{display:flex;align-items:center;gap:9px}.panel .check input{width:auto;margin:0}.contact-add{display:grid;grid-template-columns:1fr auto;gap:10px}.contact{display:flex;align-items:center;justify-content:space-between;padding:13px;border-bottom:1px solid var(--border)}.contact button{border:0;background:transparent;color:var(--accent)}.auth-shell{min-height:100%;display:grid;place-items:center;background:radial-gradient(circle at top,#17335d,#061426 55%)}.auth-card{width:min(440px,92vw);background:#fff;padding:34px;border-radius:24px;text-align:center;box-shadow:0 24px 70px rgba(0,0,0,.3)}.auth-logo{width:88px;height:88px;object-fit:contain}.auth-card h1{margin:8px 0 3px}.auth-card p{color:var(--muted)}.auth-card input{width:100%;margin:9px 0;padding:13px;border:1px solid var(--border);border-radius:12px}.auth-card button{width:100%;margin-top:10px}.danger{color:#b91c1c}.saved-account{background:#f3f7fd;padding:14px;border-radius:12px;margin:13px 0}.status-line{min-height:20px;color:#b91c1c!important}body.dark{--bg:#0c1422;--panel:#121c2c;--text:#edf3fc;--muted:#9db0c7;--border:#29384d;--incoming:#1c2a3d}body.dark .main,body.dark .messages,body.dark .panel-page{background:#0c1422}body.dark .topbar,body.dark .chat-header,body.dark .composer,body.dark .panel,body.dark .network-pill,body.dark .top-actions button,body.dark .ghost{background:#121c2c;color:var(--text)}body.dark .panel input,body.dark .panel select,body.dark .composer textarea{background:#0f1928;color:#fff}body.dark .bubble{color:#fff}@media(max-width:850px){.app{grid-template-columns:96px 1fr}.brand div,.new-chat,.sidebar-search,.conversation .conv-text,.conversation time,.sidebar nav button,.network-card div,.version span{display:none}.sidebar{padding:14px 10px;align-items:center}.brand img{width:54px}.conversation{display:block;padding:9px}.conversation .avatar{margin:auto}.top-actions button:nth-child(2){display:none}.messages{padding:14px}.bubble{max-width:82%}}


/* Mobile layout fix */
@media (max-width:700px){
  html,body{height:100%;overflow:hidden}
  .app{display:block;height:100dvh;min-height:100dvh}
  .main{height:calc(100dvh - 68px);min-height:0;width:100%}
  .sidebar{position:fixed;left:0;right:0;bottom:0;top:auto;width:100%;height:68px;z-index:50;padding:7px 10px;background:rgba(6,20,38,.97);border-top:1px solid #233851;display:block;overflow:visible}
  .sidebar>.brand,.sidebar>.new-chat,.sidebar>.sidebar-search,.sidebar>.conversation-list,.sidebar>.sidebar-spacer,.sidebar>.network-card,.sidebar>.version{display:none!important}
  .sidebar nav{display:grid!important;grid-template-columns:repeat(3,1fr);gap:6px;height:100%}
  .sidebar nav .nav{display:flex!important;align-items:center;justify-content:center;text-align:center;padding:9px 6px;font-size:13px;border-radius:11px;color:#d8e5f4}
  .sidebar nav .nav.active{background:#12315a;color:#67a9ff}
  .topbar{height:72px;min-height:72px;padding:8px 10px;justify-content:flex-start;gap:8px}
  .network-pill{padding:8px 11px;border-radius:13px;min-width:0;max-width:165px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px}
  .network-pill span{font-size:12px}
  .top-actions{position:static;margin-left:auto;gap:6px}
  .top-actions button{padding:9px 11px;border-radius:11px;font-size:0}
  .top-actions button::before{font-size:19px}
  #lock::before{content:'🔒'}
  #settings-top::before{content:'⚙️'}
  .top-actions button:nth-child(2){display:none!important}
  .chat-page{height:100%;grid-template-rows:auto minmax(0,1fr) auto}
  .chat-header{padding:10px 12px;gap:10px;min-height:82px}
  .chat-header .avatar{width:44px;height:44px}
  .chat-header strong{font-size:17px}
  .chat-header small{font-size:12px;max-width:170px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .encrypted{padding:8px 9px;font-size:12px;white-space:nowrap}
  .messages{padding:12px 10px 16px;gap:8px;overscroll-behavior:contain}
  .empty{padding:20px 14px}
  .empty h2{font-size:24px;margin:8px 0}
  .empty p{font-size:15px}
  .bubble{max-width:86%;font-size:15px}
  .file-card{min-width:0;grid-template-columns:64px minmax(0,1fr)}
  .file-thumb{width:64px;height:64px}
  .composer{padding:9px 10px calc(9px + env(safe-area-inset-bottom));grid-template-columns:46px minmax(0,1fr) 58px;gap:7px;align-items:end}
  .composer button{padding:11px 8px;min-width:44px}
  .composer textarea{min-width:0;width:100%;padding:11px;max-height:100px;font-size:16px}
  .composer .send{font-size:0}
  .composer .send::after{content:'➤';font-size:20px}
  .panel-page{padding:12px 10px 20px;overflow:auto}
  .panel{padding:17px 14px;border-radius:14px;max-width:none}
  .contact-add{grid-template-columns:1fr}
  .auth-card{width:min(420px,94vw);padding:26px 20px;border-radius:20px}
  .auth-logo{width:72px;height:72px}
}