:root{
  --bg:#070b12; --panel:#0e141c; --panel-2:#131b26; --line:#1e2732;
  --ink:#e7edf3; --ink-dim:#7d8b9a;
  --teal:#17e0b0; --teal-dim:#0d8f70;
  --violet:#8b7bff; --violet-dim:#6a5adf;
  --coral:#ff6b8b; --gold:#ffd166; --sky:#4fb8ff;
  --amber:#ffb454; --red:#ff5c72;
  --bubble-me:#103a34; --bubble-you:#141c27;
  --font-display:'Trebuchet MS', 'Segoe UI', sans-serif;
  --font-body:system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
*{box-sizing:border-box;}
html,body{height:100%;margin:0;}
body{ background:var(--bg); color:var(--ink); font-family:var(--font-body); overflow:hidden; position:relative; }
#bgMesh{ position:fixed; inset:0; z-index:0; overflow:hidden; pointer-events:none; }
#bgMesh span{ position:absolute; border-radius:50%; filter:blur(90px); opacity:.28; }
#bgMesh span:nth-child(1){ width:520px; height:520px; background:var(--violet); top:-160px; left:-120px; animation:float-a 22s ease-in-out infinite; }
#bgMesh span:nth-child(2){ width:460px; height:460px; background:var(--teal); bottom:-180px; right:-100px; animation:float-b 26s ease-in-out infinite; }
#bgMesh span:nth-child(3){ width:340px; height:340px; background:var(--coral); top:35%; right:8%; opacity:.16; animation:float-c 30s ease-in-out infinite; }
#bgMesh span:nth-child(4){ width:300px; height:300px; background:var(--sky); bottom:10%; left:12%; opacity:.14; animation:float-a 34s ease-in-out infinite reverse; }
@keyframes float-a{ 0%,100%{ transform:translate(0,0) scale(1);} 50%{ transform:translate(60px,40px) scale(1.12);} }
@keyframes float-b{ 0%,100%{ transform:translate(0,0) scale(1);} 50%{ transform:translate(-50px,-30px) scale(1.08);} }
@keyframes float-c{ 0%,100%{ transform:translate(0,0);} 50%{ transform:translate(-40px,50px);} }
#bgShimmer{ position:fixed; inset:-50%; z-index:0; pointer-events:none;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(139,123,255,0.06) 30deg, transparent 60deg, rgba(23,224,176,0.05) 120deg, transparent 180deg, rgba(79,184,255,0.04) 240deg, transparent 360deg);
  animation: spin 60s linear infinite; mix-blend-mode: screen; opacity:.8;
}
@keyframes spin { to { transform: rotate(360deg); } }
#authScreen, #appShell, .toast-wrap, #bootOverlay { position:relative; z-index:1; }
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:var(--line);border-radius:8px;}
::-webkit-scrollbar-track{background:transparent;}
button{font-family:inherit; cursor:pointer;}
input,textarea{font-family:inherit;}
.hidden{display:none !important;}

/* AUTH */
#authScreen{ position:fixed; inset:0; display:flex; align-items:center; justify-content:center; z-index:40; }
.auth-card{ width:380px; max-width:90vw; background:rgba(14,20,28,0.72); backdrop-filter:blur(18px); border:1px solid var(--line); border-radius:20px; padding:34px 30px; box-shadow:0 30px 80px rgba(0,0,0,.55); animation:card-in .5s cubic-bezier(.16,.9,.24,1.12); }
@keyframes card-in{ from{opacity:0; transform:translateY(22px) scale(.94) rotateX(6deg);} to{opacity:1; transform:none;} }
.auth-mark{ display:flex; align-items:center; gap:10px; margin-bottom:22px; }
.auth-mark .sq{ width:34px;height:34px;border-radius:9px; background:linear-gradient(135deg,var(--teal),var(--violet)); display:flex;align-items:center;justify-content:center;font-weight:700;color:#08111a;font-family:var(--font-display); animation: blob-morph 8s ease-in-out infinite; }
@keyframes blob-morph{
  0%,100%{ border-radius:46% 54% 60% 40% / 45% 40% 60% 55%; }
  33%{ border-radius:60% 40% 45% 55% / 55% 60% 40% 45%; }
  66%{ border-radius:40% 60% 55% 45% / 40% 45% 55% 60%; }
}
.auth-mark h1{ font-family:var(--font-display); font-size:1.15rem; margin:0; letter-spacing:.3px; }
.auth-mark span{ font-size:.7rem; color:var(--ink-dim); font-family:var(--font-mono); }
h2.auth-title{ font-family:var(--font-display); font-size:1.3rem; margin:4px 0 4px; font-weight:600; }
.auth-sub{ color:var(--ink-dim); font-size:.82rem; margin:0 0 18px; line-height:1.5; }
.field{ margin-bottom:12px; }
.field label{ font-size:.72rem; color:var(--ink-dim); display:block; margin-bottom:5px; font-family:var(--font-mono); text-transform:uppercase; letter-spacing:.5px; }
.field-wrap{ position:relative; }
.field-err{ color:var(--red); font-size:.72rem; margin-top:4px; display:none; }
.field-err.show{ display:block; }
.field-hint{ color:var(--ink-dim); font-size:.68rem; margin-top:4px; }
input[type=text],input[type=password],textarea{ width:100%; background:var(--panel-2); border:1px solid var(--line); color:var(--ink); padding:11px 12px; border-radius:10px; font-size:.9rem; outline:none; transition:border-color .15s; font-family: inherit; }
input[type=text]:focus,input[type=password]:focus,textarea:focus{ border-color:var(--teal); }
.eye{ position:absolute; right:10px; top:50%; transform:translateY(-50%); background:none; border:none; color:var(--ink-dim); font-size:.95rem; }
.btn-primary{ width:100%; padding:12px; border:none; border-radius:10px; margin-top:8px; font-weight:600; font-size:.86rem; color:#06110d; background:linear-gradient(135deg,var(--teal),#3ff0c8); transition:transform .12s ease, box-shadow .12s ease; }
.btn-primary:hover{ transform:translateY(-1px); box-shadow:0 8px 24px rgba(23,224,176,.28); }
.btn-primary:active{ transform:scale(.98); }
.btn-primary:disabled{ opacity:.45; cursor:not-allowed; transform:none !important; box-shadow:none !important; }
.btn-ghost{ width:100%; padding:9px; border:1px solid var(--line); background:transparent; color:var(--ink-dim); border-radius:10px; margin-top:8px; font-size:.78rem; }
.btn-ghost:hover{ color:var(--ink); border-color:var(--teal-dim); }
.switch-row{ text-align:center; margin-top:16px; font-size:.8rem; color:var(--ink-dim); }
.switch-row b{ color:var(--teal); cursor:pointer; }
.strength-bar{ height:5px; border-radius:3px; background:var(--line); margin-top:7px; overflow:hidden; }
.strength-fill{ height:100%; width:0%; border-radius:3px; transition:width .25s ease, background-color .25s ease; }
.strength-label{ font-size:.68rem; margin-top:4px; font-family:var(--font-mono); color:var(--ink-dim); }
.gen-len-row{ display:flex; align-items:center; gap:8px; margin:2px 0 8px; }
.gen-len-row input[type=range]{ flex:1; accent-color:var(--teal); }
.gen-len-row span{ font-size:.72rem; color:var(--ink-dim); font-family:var(--font-mono); width:34px; text-align:right; }

/* BOOT OVERLAY */
#bootOverlay{ position:fixed; inset:0; z-index:45; display:flex; align-items:center; justify-content:center; background:rgba(5,8,14,0.92); backdrop-filter:blur(8px); opacity:0; pointer-events:none; transition:opacity .25s ease; }
#bootOverlay.show{ opacity:1; pointer-events:all; }
.boot-ring{ width:64px; height:64px; border-radius:50%; background: conic-gradient(from 0deg, var(--teal), var(--violet), var(--coral), var(--teal)); position:relative; animation: spin 1.6s linear infinite; box-shadow: 0 0 60px rgba(139,123,255,.45); }
.boot-ring::after{ content:""; position:absolute; inset:6px; background:var(--bg); border-radius:50%; }
.boot-text{ position:absolute; bottom:-30px; left:50%; transform:translateX(-50%); font-family:var(--font-mono); color:var(--ink-dim); font-size:.78rem; white-space:nowrap; letter-spacing:.5px; }
.boot-text .dots::after{ content:""; display:inline-block; width:1em; text-align:left; animation: dots 1.2s steps(4) infinite; }
@keyframes dots { 0%{content:""} 25%{content:"."} 50%{content:".."} 75%{content:"..."} }

/* APP SHELL */
#appShell{ height:100vh; display:flex; opacity:0; transition: opacity .35s ease; }
#appShell.visible{ opacity:1; }
.view{ width:100%; height:100%; display:flex; }
#listView.hidden, #chatView.hidden{ display:none; }
#listView{ animation: slide-from-left .3s cubic-bezier(.2,.85,.25,1.1); }
#chatView{ animation: slide-from-right .3s cubic-bezier(.2,.85,.25,1.1); }
@keyframes slide-from-left { from{ opacity:0; transform: translateX(-18px);} to{opacity:1; transform:none;} }
@keyframes slide-from-right { from{ opacity:0; transform: translateX(18px);} to{opacity:1; transform:none;} }
.sidebar{ width:100%; height:100%; background:rgba(14,20,28,0.82); backdrop-filter:blur(14px); display:flex; flex-direction:column; }
.sidebar-head{ padding:16px 18px; border-bottom:1px solid var(--line); display:flex; align-items:center; justify-content:space-between; }
.notification-strip{ padding:7px 16px; border-bottom:1px solid rgba(30,39,50,.8); color:var(--ink-dim); background:rgba(19,27,38,.64); font-family:var(--font-mono); font-size:.65rem; letter-spacing:.35px; text-transform:uppercase; }
.who{ display:flex; align-items:center; gap:10px; }
.avatar{ width:36px;height:36px;border-radius:10px; background:linear-gradient(135deg,var(--violet),var(--teal)); display:flex;align-items:center;justify-content:center; font-weight:700; font-family:var(--font-display); color:#08111a; font-size:.85rem; flex-shrink:0; transition:transform .2s cubic-bezier(.3,1.4,.5,1); box-shadow:0 3px 10px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.25); animation: blob-morph 12s ease-in-out infinite; }
.who-name{ font-weight:600; font-size:.9rem; }
.who-sub{ font-size:.68rem; color:var(--teal); font-family:var(--font-mono); display:flex; align-items:center; gap:5px; }
.who-sub::before{ content:""; width:6px; height:6px; border-radius:50%; background: var(--teal); box-shadow: 0 0 0 0 rgba(23,224,176,.6); animation: pulse-dot 1.8s ease-in-out infinite; }
@keyframes pulse-dot { 0%,100%{ box-shadow: 0 0 0 0 rgba(23,224,176,.6);} 50%{ box-shadow: 0 0 0 6px rgba(23,224,176,0);} }
.icon-btn{ background:var(--panel-2); border:1px solid var(--line); color:var(--ink-dim); width:34px;height:34px;border-radius:9px; display:flex;align-items:center;justify-content:center; transition:all .15s; }
.icon-btn:hover{ color:var(--ink); border-color:var(--teal-dim); }
.new-chat-box{ padding:14px 16px; border-bottom:1px solid var(--line); display:flex; flex-direction:column; gap:7px; }
.new-chat-box input{ font-size:.82rem; padding:9px 10px; }
.new-chat-box button{ background:var(--teal); border:none; color:#06110d; font-weight:600; font-size:.78rem; padding:8px; border-radius:8px; transition: transform .15s, box-shadow .15s, background .15s; }
.new-chat-box button:hover{ background:#3ff0c8; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(23,224,176,.3); }
.new-chat-box button:active{ transform: scale(.97); }
.section-label{ font-family:var(--font-mono); font-size:.66rem; letter-spacing:1px; text-transform:uppercase; color:var(--teal); padding:12px 16px 4px; }
.chat-list{ flex:1; overflow-y:auto; }
.invite-item{ margin:8px 12px; padding:10px 12px; background:rgba(255,180,84,0.08); border:1px solid rgba(255,180,84,0.35); border-radius:10px; font-size:.78rem; animation: invite-pop .35s cubic-bezier(.2,1.3,.4,1); }
@keyframes invite-pop { from{ opacity:0; transform: scale(.9) translateY(-4px);} to{ opacity:1; transform:none;} }
.invite-actions{ display:flex; gap:6px; margin-top:8px; }
.invite-actions button{ flex:1; border:none; border-radius:7px; padding:6px; font-size:.72rem; font-weight:600; }
.invite-actions .accept{ background:var(--teal); color:#06110d; }
.invite-actions .reject{ background:var(--red); color:#210608; }
.chat-item{ display:flex; align-items:center; gap:10px; padding:12px 16px; border-left:2px solid transparent; transition:background .15s, transform .15s, border-color .15s; cursor:pointer; }
.chat-item:hover{ background:rgba(255,255,255,0.03); transform:translateX(3px); border-left-color: var(--teal-dim); }
.chat-item:hover .avatar{ transform:scale(1.08) rotate(-3deg) translateY(-1px); }
.chat-item:active{ transform:translateX(3px) scale(.99); }
.chat-item .avatar{ width:38px;height:38px; font-size:.85rem; }
.chat-item .meta{ min-width:0; flex: 1; }
.chat-item .name{ font-size:.9rem; font-weight:500; }
.chat-item .preview{ font-size:.74rem; color:var(--ink-dim); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:220px; }
.chat-item .pair-dot{ font-size: .65rem; padding: 2px 6px; border-radius: 20px; font-family: var(--font-mono); margin-left: auto; flex-shrink: 0; }
.chat-item .pair-dot.paired{ background: rgba(23,224,176,0.1); color: var(--teal); border: 1px solid rgba(23,224,176,0.3); }
.chat-item .pair-dot.unpaired{ background: rgba(255,180,84,0.1); color: var(--amber); border: 1px solid rgba(255,180,84,0.3); }
.unread-count{ min-width:19px; height:19px; padding:0 6px; border-radius:12px; display:inline-flex; align-items:center; justify-content:center; background:var(--violet); color:#fff; font-size:.65rem; font-family:var(--font-mono); font-weight:700; line-height:1; box-shadow:0 0 0 2px rgba(14,20,28,.9); }
.empty-list{ padding:14px 16px; color:var(--ink-dim); font-size:.78rem; }
.ripple{ position:relative; overflow:hidden; }
.ripple-dot{ position:absolute; border-radius:50%; background:rgba(255,255,255,0.5); transform:scale(0); animation:ripple-anim .6s ease-out; pointer-events:none; }
@keyframes ripple-anim{ to{ transform:scale(2.6); opacity:0; } }
.skeleton{ background: linear-gradient(90deg, var(--line) 0%, rgba(125,139,154,.25) 50%, var(--line) 100%); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; border-radius: 6px; height: 12px; width: 60%; }
@keyframes shimmer { from{ background-position: 200% 0;} to{ background-position: -200% 0;} }

.chat-main{ flex:1; display:flex; flex-direction:column; min-width:0; background: radial-gradient(700px 400px at 50% 0%, rgba(139,123,255,0.04), transparent 60%), var(--bg); }
.chat-top{ height:58px; border-bottom:1px solid var(--line); display:flex; align-items:center; justify-content:space-between; padding:0 14px; background:rgba(14,20,28,0.85); backdrop-filter:blur(14px); flex-shrink:0; gap:10px; }
.chat-top .peer{ display:flex; align-items:center; gap:10px; min-width:0; }
.chat-top .peer-name{ font-weight:600; font-size:.92rem; }
.back-btn{ background:none; border:none; color:var(--ink); font-size:1.2rem; padding:4px 6px; flex-shrink:0; transition: transform .12s; }
.back-btn:hover{ transform: translateX(-2px); }
.badge{ font-size:.66rem; font-family:var(--font-mono); padding:3px 8px; border-radius:20px; display:flex; align-items:center; gap:4px; flex-shrink:0; }
.badge.encrypted{ background:rgba(23,224,176,0.1); color:var(--teal); border:1px solid rgba(23,224,176,0.3); }
.badge.encrypted::before{ content:""; width:6px; height:6px; border-radius:50%; background: var(--teal); animation: pulse-dot 1.8s ease-in-out infinite; }
.badge.unpaired{ background: rgba(255,180,84,0.1); color: var(--amber); border:1px solid rgba(255,180,84,0.3); }

.messages{ flex:1; overflow-y:auto; padding:22px; display:flex; flex-direction:column; gap:9px; }
.msg-row{ display:flex; max-width:74%; animation:msg-in .32s cubic-bezier(.2,.85,.25,1.15); }
@keyframes msg-in{ 0%{ opacity:0; transform:translateY(14px) scale(.94);} 100%{ opacity:1; transform:none;} }
.msg-row.me{ align-self:flex-end; }
.msg-row.you{ align-self:flex-start; }
.bubble{ padding:9px 12px; border-radius:12px; font-size:.87rem; line-height:1.45; white-space:pre-wrap; word-break:break-word; }
.msg-row.me .bubble{ background:var(--bubble-me); border:1px solid rgba(23,224,176,0.18); border-bottom-right-radius:3px; }
.msg-row.you .bubble{ background:var(--bubble-you); border:1px solid var(--line); border-bottom-left-radius:3px; }
.msg-time{ font-size:.63rem; color:var(--ink-dim); margin-top:3px; text-align:right; font-family:var(--font-mono); }
.msg-row.you .msg-time{ text-align:left; }
.msg-row.me .msg-status::before{ content:"✓✓ "; color: var(--teal); }
.message-state{ display:inline-flex; align-items:center; gap:5px; color:var(--ink-dim); font-family:var(--font-mono); font-size:.63rem; }
.message-state.sending{ color:var(--amber); }
.message-state.failed{ color:var(--red); }
.message-state .sending{ color:var(--amber); }
.message-state .failed{ color:var(--red); }
.retry-btn{ margin-left:5px; padding:2px 6px; border:1px solid rgba(255,92,114,.42); border-radius:6px; background:rgba(255,92,114,.08); color:var(--red); font:inherit; font-size:.62rem; }
.retry-btn:hover{ background:rgba(255,92,114,.16); border-color:var(--red); }

.send-status{ min-height:25px; padding:6px 16px 5px; border-top:1px solid rgba(30,39,50,.55); background:rgba(14,20,28,.78); color:var(--ink-dim); font-family:var(--font-mono); font-size:.64rem; line-height:1.35; text-align:center; }
.composer{ border-top:1px solid var(--line); background:rgba(14,20,28,0.85); backdrop-filter:blur(14px); padding:12px 16px; display:flex; gap:10px; align-items:center; flex-shrink:0; }
.composer input{ flex:1; padding:11px 14px; border-radius:22px; }
.composer button{ width:42px;height:42px;border-radius:50%; border:none; background:linear-gradient(135deg,var(--teal),var(--sky)); color:#06110d; font-size:1rem; flex-shrink:0; transition:transform .18s cubic-bezier(.34,1.56,.64,1), box-shadow .18s ease, background .18s ease; box-shadow:0 4px 14px rgba(23,224,176,0.35), inset 0 1px 0 rgba(255,255,255,0.25); position:relative; overflow:hidden; }
.composer button:hover{ transform:scale(1.1) translateY(-2px); box-shadow:0 8px 22px rgba(23,224,176,0.5); }
.composer button:active{ transform:scale(.92); }
.composer button.sending{ animation: send-pop .55s ease; background: linear-gradient(135deg, var(--violet), var(--teal)); }
@keyframes send-pop {
  0%{ transform: scale(1) rotate(0); }
  30%{ transform: scale(.85) rotate(-15deg); }
  60%{ transform: scale(1.2) rotate(20deg); }
  100%{ transform: scale(1) rotate(0); }
}

.toast-wrap{ position:fixed; top:16px; left:50%; transform:translateX(-50%); z-index:60; display:flex; flex-direction:column; gap:8px; align-items:center; }
.toast{ background:var(--panel); border:1px solid var(--line); padding:10px 16px; border-radius:10px; font-size:.8rem; box-shadow:0 10px 30px rgba(0,0,0,.4); animation:toast-in .25s ease-out; }
@keyframes toast-in{ from{opacity:0; transform:translateY(-8px);} to{opacity:1; transform:none;} }
.toast.danger{ border-color:rgba(255,92,114,0.4); color:var(--red); }
.toast.warn{ border-color:rgba(255,180,84,0.4); color:var(--amber); }
.toast.info{ border-color:rgba(23,224,176,0.4); color:var(--teal); }

/* NASTAVENÍ A SOUKROMÍ */
.settings-dialog{ width:min(560px, calc(100vw - 28px)); max-height:min(780px, calc(100dvh - 28px)); margin:auto; padding:0; overflow-y:auto; color:var(--ink); background:rgba(14,20,28,.98); border:1px solid rgba(139,123,255,.45); border-radius:16px; box-shadow:0 28px 80px rgba(0,0,0,.68), 0 0 42px rgba(139,123,255,.13); }
.settings-dialog::backdrop{ background:rgba(3,7,12,.72); backdrop-filter:blur(4px); }
.settings-dialog:focus{ outline:none; }
.dialog-head{ position:sticky; top:0; z-index:1; display:flex; align-items:center; justify-content:space-between; gap:16px; padding:18px 20px 14px; background:linear-gradient(180deg, rgba(19,27,38,.99), rgba(14,20,28,.94)); border-bottom:1px solid var(--line); }
.dialog-head h2{ margin:0; color:var(--ink); font-family:var(--font-display); font-size:1.1rem; letter-spacing:.1px; }
.dialog-head form{ margin:0; }
.dialog-close{ width:30px; height:30px; display:inline-flex; align-items:center; justify-content:center; padding:0; border:1px solid var(--line); border-radius:8px; background:var(--panel-2); color:var(--ink-dim); font-size:1.35rem; line-height:1; }
.dialog-close:hover{ color:var(--ink); border-color:var(--teal-dim); }
.dialog-intro,.peer-label{ margin:16px 20px 4px; color:var(--ink-dim); font-size:.78rem; line-height:1.48; }
.peer-label strong{ color:var(--teal); font-weight:600; }
.settings-section{ margin:16px 20px 0; padding:0 0 16px; border-bottom:1px solid var(--line); }
.settings-section:last-child{ border-bottom:0; }
.settings-section h3{ margin:0 0 8px; color:var(--teal); font-family:var(--font-mono); font-size:.72rem; font-weight:600; letter-spacing:.65px; text-transform:uppercase; }
.settings-section p{ margin:7px 0; color:var(--ink-dim); font-size:.76rem; line-height:1.5; }
.settings-note{ max-width:58ch; }
.settings-action{ width:100%; margin-top:10px; }
.settings-section .settings-row{ display:flex; align-items:center; gap:9px; min-height:34px; margin-top:8px; padding:7px 9px; border:1px solid rgba(30,39,50,.9); border-radius:8px; background:rgba(19,27,38,.55); color:var(--ink); font-size:.79rem; }
.settings-row input[type=checkbox]{ width:16px; height:16px; margin:0; accent-color:var(--teal); flex:0 0 auto; }
.settings-row label{ cursor:pointer; }
.settings-label{ display:block; margin:11px 0 5px; color:var(--ink-dim); font-family:var(--font-mono); font-size:.67rem; letter-spacing:.4px; text-transform:uppercase; }
.settings-section input[type=password]{ padding:10px 11px; }
.input-hint{ margin-top:4px !important; font-family:var(--font-mono); font-size:.66rem !important; }
.settings-summary{ min-height:18px; margin-top:10px !important; color:var(--teal) !important; font-family:var(--font-mono); font-size:.68rem !important; }
.blocked-list:empty::before{ content:"Žádné blokované kontakty."; display:block; padding:9px 10px; border:1px dashed var(--line); border-radius:8px; color:var(--ink-dim); font-size:.75rem; }
.blocked-row{ display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:7px; padding:8px 10px; border:1px solid rgba(255,92,114,.2); border-radius:8px; background:rgba(255,92,114,.05); font-size:.78rem; }
.blocked-badge{ display:inline-flex; align-items:center; padding:3px 7px; border:1px solid rgba(255,92,114,.4); border-radius:20px; color:var(--red); background:rgba(255,92,114,.09); font-family:var(--font-mono); font-size:.62rem; }
.metadata-section{ margin-bottom:16px; }
.privacy-warning{ padding:9px 10px; border:1px solid rgba(255,180,84,.36); border-radius:8px; background:rgba(255,180,84,.08); color:var(--amber) !important; }
.delete-history-section{ margin-bottom:16px; }
.danger-action{ border-color:rgba(255,92,114,.45); color:var(--red); }
.danger-action:hover{ border-color:var(--red); background:rgba(255,92,114,.08); color:#ff9aaa; }
@media (max-width: 520px){
  .auth-card{ padding: 26px 22px; }
  .messages{ padding: 14px; }
  .msg-row{ max-width: 86%; }
  .settings-dialog{ width:calc(100vw - 18px); max-height:calc(100dvh - 18px); }
  .dialog-head{ padding:15px 16px 12px; }
  .dialog-intro,.peer-label{ margin-left:16px; margin-right:16px; }
  .settings-section{ margin-left:16px; margin-right:16px; }
}

/* ===== PŘIDÁNO: burst částic při odeslání zprávy ===== */
.send-particle{
  position:fixed; width:6px; height:6px; border-radius:50%;
  background: var(--teal); pointer-events:none; z-index:70;
  animation: send-particle-fly .55s cubic-bezier(.2,.8,.3,1) forwards;
}
@keyframes send-particle-fly{
  0%{ transform:translate(0,0) scale(1); opacity:1; }
  100%{ transform:translate(var(--dx,0px), var(--dy,-40px)) scale(0); opacity:0; }
}


/* Stabilní mobilní výška a respektování omezeného pohybu. */
#appShell{height:100dvh;}
#authScreen{overflow-y:auto;padding:20px 0;}
.auth-card{margin:auto;max-height:calc(100dvh - 32px);overflow-y:auto;}
.eye{font-size:.65rem;}
.field-wrap input{padding-right:65px;}
.local-note{font-size:.7rem;color:var(--ink-dim);line-height:1.5;margin:16px 0 0;padding-top:12px;border-top:1px solid var(--line);}
.new-chat-box .field-hint{line-height:1.5;}
button:focus-visible,[role=button]:focus-visible{outline:2px solid var(--teal);outline-offset:3px;}
.switch-row b:focus-visible{outline:2px solid var(--teal);}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important;}#bgShimmer{display:none;}}

.blocked-row button{width:auto;margin:0;padding:6px 10px;flex-shrink:0;}
.settings-dialog a{color:var(--teal);text-underline-offset:3px;}

/* Lokální uzamčení a ověření klíčů. */
.switch-row .switch-link{
  appearance:none;
  border:0;
  padding:0;
  background:transparent;
  color:var(--teal);
  font:inherit;
  font-weight:700;
  cursor:pointer;
}
.switch-row .switch-link:hover{ color:#3ff0c8; text-decoration:underline; text-underline-offset:3px; }
.sidebar-actions,.chat-actions{ display:flex; align-items:center; gap:6px; flex-shrink:0; }
.lock-btn{
  min-height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:5px;
  padding:0 9px;
  border:1px solid rgba(23,224,176,.36);
  border-radius:9px;
  background:rgba(23,224,176,.08);
  color:var(--teal);
  font-size:.7rem;
  font-weight:650;
  letter-spacing:.08px;
  transition:background .15s, border-color .15s, color .15s;
}
.lock-btn:hover{ background:rgba(23,224,176,.15); border-color:var(--teal); color:#baffed; }
.lock-btn span[aria-hidden="true"]{ font-size:.95rem; line-height:1; }
.session-security{ padding-bottom:18px; }
.settings-section select{
  width:100%;
  min-height:40px;
  padding:9px 34px 9px 11px;
  border:1px solid var(--line);
  border-radius:9px;
  background:var(--panel-2);
  color:var(--ink);
  font:inherit;
  font-size:.82rem;
  outline:none;
}
.settings-section select:focus{ border-color:var(--teal); }
.session-security .settings-row{ margin-top:9px; }
.session-security .settings-note{ margin-top:11px; }
.safety-number{
  display:block;
  width:100%;
  margin:10px 0 8px;
  padding:10px 11px;
  border:1px solid rgba(139,123,255,.42);
  border-radius:9px;
  background:rgba(139,123,255,.07);
  color:#d7d2ff;
  font-family:var(--font-mono);
  font-size:.75rem;
  line-height:1.55;
  letter-spacing:.2px;
  white-space:pre-wrap;
  overflow-wrap:anywhere;
  word-break:break-word;
}
.verification-status{
  min-height:19px;
  color:var(--teal) !important;
  font-family:var(--font-mono);
  font-size:.69rem !important;
}
.verification-row{
  display:flex;
  align-items:flex-start;
  gap:9px;
  margin-top:10px;
  padding:9px 10px;
  border:1px solid rgba(30,39,50,.9);
  border-radius:9px;
  background:rgba(19,27,38,.55);
  color:var(--ink);
  font-size:.78rem;
  line-height:1.38;
}
.verification-row input[type=checkbox]{
  width:16px;
  height:16px;
  margin:2px 0 0;
  accent-color:var(--teal);
  flex:0 0 auto;
}
.verification-row label{ cursor:pointer; }
#copySafetyBtn{ margin-top:10px; }
@media (max-width: 520px){
  .lock-btn{ width:34px; padding:0; }
  .lock-btn span:last-child{ display:none; }
  .sidebar-actions{ gap:4px; }
}

/* ONLINE stav: záměrně jen doplněk k zachovanému rozhraní. */
.connection-strip{padding:6px 16px;border-bottom:1px solid rgba(30,39,50,.8);background:rgba(7,11,18,.42);color:var(--ink-dim);font-family:var(--font-mono);font-size:.65rem;letter-spacing:.25px;}
.online-state{display:inline-flex;align-items:center;gap:6px;color:var(--teal);}
.online-state::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 8px currentColor;}
.online-state.positive{color:var(--teal);}
.online-state.offline{color:var(--amber);}

/* Online reliability and private account tools. */
.message-state.waiting { color: var(--amber); }
.message-state.restored { color: var(--teal); }
.feature-panel { margin-top: 16px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; background: rgba(23, 224, 176, .035); }
.feature-panel h4 { margin: 0 0 10px; font-size: .92rem; color: var(--ink); }
.session-list, .restored-backup-list { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.session-row, .restored-backup-row { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; }
.session-row p, .restored-backup-row p { margin: 4px 0 0; }
.session-row button, .restored-backup-row button { flex-shrink: 0; }
#restoreBackupFile { max-width: 100%; padding: 10px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; color: var(--ink); }
#restoreBackupFile::file-selector-button { color: var(--ink); border: 1px solid var(--line); border-radius: 7px; background: transparent; padding: 7px 10px; margin-right: 10px; cursor: pointer; }
@media (max-width: 480px) { .session-row, .restored-backup-row { align-items: flex-start; flex-direction: column; } .feature-panel { padding: 12px; } }

.session-row button, .restored-backup-row button { width: auto; min-width: 96px; padding-inline: 12px; }
.session-row > span, .restored-backup-row > span { min-width: 0; overflow-wrap: anywhere; font-size: .78rem; line-height: 1.5; }