:root{
  --ink:#1b1d1f;
  --paper:#f6f4ef;
  --panel:#fffdf9;
  --line:#e2ddd1;
  --accent:#2f6f5e;
  --accent-soft:#e5efe9;
  --bubble-me:#2f6f5e;
  --bubble-me-text:#fbfaf6;
  --bubble-them:#efece3;
  --muted:#7c7a72;
  --danger:#a5432f;
}
html[data-theme="dark"]{
  --ink:#eceae4;
  --paper:#17191a;
  --panel:#1f2224;
  --line:#33373a;
  --accent:#4fae92;
  --accent-soft:#223a33;
  --bubble-me:#2f6f5e;
  --bubble-me-text:#f3fbf7;
  --bubble-them:#2a2d2f;
  --muted:#9a978e;
  --danger:#d9705a;
}
*{box-sizing:border-box;}
html,body{height:100%;margin:0;}
body{
  font-family:'Iowan Old Style','Georgia',serif;
  background:var(--paper);
  color:var(--ink);
  transition:background .15s ease, color .15s ease;
}
.hidden{ display:none !important; }
button{ font-family:inherit; }

/* ---------- Auth screen ---------- */
#auth-screen{
  height:100vh;
  height:100dvh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:16px;
}
#auth-card{
  width:340px;
  max-width:100%;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:14px;
  padding:32px 28px;
}
#auth-card h1{ margin:0 0 2px; font-size:26px; font-weight:600; }
.tagline{ margin:0 0 22px; color:var(--muted); font-size:13px; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
#auth-tabs{ display:flex; gap:4px; margin-bottom:18px; background:var(--paper); border-radius:10px; padding:4px; }
.tab-btn{
  flex:1; border:none; background:none; padding:8px; border-radius:8px;
  cursor:pointer; font-size:13.5px; color:var(--muted);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
.tab-btn.active{ background:var(--panel); color:var(--ink); font-weight:600; box-shadow:0 1px 2px rgba(0,0,0,.06); }
.auth-form{ display:flex; flex-direction:column; gap:10px; }
.auth-form input{
  padding:12px 13px; border:1px solid var(--line); border-radius:9px;
  font-size:16px; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--paper); color:var(--ink);
}
.auth-form input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.auth-form button[type=submit]{
  margin-top:4px; padding:11px; border:none; border-radius:9px;
  background:var(--accent); color:#fff; font-size:14px; font-weight:600; cursor:pointer;
}
.auth-form button[type=submit]:hover{ opacity:.9; }
.auth-error{ color:var(--danger); font-size:12.5px; min-height:16px; margin:2px 0 0; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }

/* ---------- App shell ---------- */
:root{ box-sizing:border-box; }
#app{
  display:flex;
  height:100vh;
  height:100dvh;
  max-width:960px;
  margin:0 auto;
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
  background:var(--panel);
}
#sidebar{ width:300px; flex-shrink:0; border-right:1px solid var(--line); display:flex; flex-direction:column; }
#sidebar-head{
  padding:18px 18px 12px; border-bottom:1px solid var(--line);
  display:flex; align-items:center; justify-content:space-between;
}
#sidebar-head h1{ font-size:19px; margin:0; font-weight:600; }
#me-username{ margin:2px 0 0; font-size:12px; color:var(--muted); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
#logout-btn{
  border:none; background:none; font-size:16px; color:var(--muted); cursor:pointer;
  width:30px; height:30px; border-radius:8px;
}
#logout-btn:hover{ background:var(--paper); color:var(--danger); }

#new-chat-box{ padding:12px 14px; border-bottom:1px solid var(--line); position:relative; }
#user-search{
  width:100%; padding:9px 12px; border:1px solid var(--line); border-radius:9px;
  font-size:13.5px; background:var(--paper); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#user-search:focus{ outline:2px solid var(--accent); outline-offset:1px; }
#user-results{
  position:absolute; left:14px; right:14px; top:48px; z-index:5;
  background:var(--panel); border:1px solid var(--line); border-radius:9px;
  box-shadow:0 6px 18px rgba(0,0,0,.08); overflow:hidden;
}
.user-result{
  padding:9px 12px; cursor:pointer; font-size:13.5px;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  display:flex; align-items:center; gap:9px;
}
.user-result:hover{ background:var(--accent-soft); }

#contacts{ overflow-y:auto; flex:1; }
.contact{
  display:flex; align-items:center; gap:11px; padding:12px 18px; cursor:pointer;
  border-bottom:1px solid var(--line); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
.contact:hover{ background:#faf8f2; }
.contact.active{ background:var(--accent-soft); }
.avatar{
  width:38px; height:38px; border-radius:50%; background:var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:14px; font-weight:600; flex-shrink:0;
  position:relative;
}
.avatar .presence{
  position:absolute; bottom:-1px; right:-1px; width:10px; height:10px; border-radius:50%;
  background:#9c9891; border:2px solid var(--panel);
}
.avatar .presence.online{ background:#3fa66b; }
.contact-meta{ min-width:0; flex:1; }
.contact-name{ font-size:14px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.contact-preview{ font-size:12.5px; color:var(--muted); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; margin-top:2px; }
.contact-time{ font-size:11px; color:var(--muted); flex-shrink:0; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
.unread-badge{
  background:var(--accent); color:#fff; font-size:10.5px; font-weight:700;
  min-width:17px; height:17px; border-radius:9px; display:flex; align-items:center; justify-content:center;
  padding:0 5px; flex-shrink:0;
}

/* ---------- Chat pane ---------- */
#chat{ flex:1; display:flex; flex-direction:column; min-width:0; position:relative; }
#empty-state{
  flex:1; display:flex; align-items:center; justify-content:center; color:var(--muted);
  font-size:14px; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; text-align:center; padding:40px;
}
#chat-active{ display:flex; flex-direction:column; height:100%; min-height:0; }
#chat-head{ padding:15px 22px; border-bottom:1px solid var(--line); display:flex; align-items:center; gap:12px; flex-shrink:0; }
#chat-head .avatar{ width:34px; height:34px; font-size:13px; }
#chat-head-name{ font-size:15.5px; font-weight:600; }
#chat-head-status{ font-size:12px; color:var(--muted); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
#back-to-list-btn{
  display:none; border:none; background:none; font-size:20px; cursor:pointer; color:var(--ink);
  width:36px; height:36px; border-radius:50%; flex-shrink:0; align-items:center; justify-content:center;
}
#back-to-list-btn:hover{ background:var(--paper); }

#messages{ flex:1; min-height:0; overflow-y:auto; -webkit-overflow-scrolling:touch; padding:22px; display:flex; flex-direction:column; gap:10px; }
.msg-row{ display:flex; }
.msg-row.me{ justify-content:flex-end; }
.msg-row > div{ max-width:65%; min-width:0; }
.bubble{
  display:block; width:fit-content; max-width:100%; padding:9px 14px; border-radius:16px;
  font-size:14.5px; line-height:1.42; white-space:pre-wrap; overflow-wrap:anywhere;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
.msg-row.me > div{ display:flex; flex-direction:column; align-items:flex-end; }
.msg-row.them .bubble{ background:var(--bubble-them); color:var(--ink); border-bottom-left-radius:4px; }
.msg-row.me .bubble{ background:var(--bubble-me); color:var(--bubble-me-text); border-bottom-right-radius:4px; }
.msg-time{ font-size:10.5px; color:var(--muted); margin-top:3px; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
.msg-row.me .msg-time{ text-align:right; }

#typing-indicator{
  padding:0 22px 8px; font-size:12px; color:var(--muted); font-style:italic;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}

#composer{
  display:flex; align-items:flex-end; gap:10px; padding:14px 18px; border-top:1px solid var(--line);
  padding-bottom:calc(14px + env(safe-area-inset-bottom, 0px));
}
#msg-input{
  flex:1; resize:none; border:1px solid var(--line); background:var(--paper); border-radius:18px;
  padding:10px 16px; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  font-size:16px; max-height:120px; line-height:1.4; color:var(--ink);
}
#msg-input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
#send-btn{
  background:var(--accent); color:#fff; border:none; border-radius:50%; width:40px; height:40px;
  flex-shrink:0; cursor:pointer; display:flex; align-items:center; justify-content:center;
}
#send-btn:hover{ opacity:.88; }
#send-btn:active{ transform:scale(0.94); }

#messages::-webkit-scrollbar, #contacts::-webkit-scrollbar{ width:8px; }
#messages::-webkit-scrollbar-thumb, #contacts::-webkit-scrollbar-thumb{ background:var(--line); border-radius:4px; }

@media (max-width:640px){
  #app{
    border-left:none; border-right:none; max-width:100vw;
    padding-top:env(safe-area-inset-top, 0px);
  }

  /* Single-pane navigation: sidebar and chat occupy the same space,
     JS toggles .mobile-chat-open on #app to switch between them. */
  #sidebar{ width:100vw; flex-shrink:0; }
  #chat{ width:100vw; }
  #app.mobile-chat-open #sidebar{ display:none; }
  #app:not(.mobile-chat-open) #chat{ display:none; }
  #back-to-list-btn{ display:flex; }

  #sidebar-head{ padding:14px 14px 10px; padding-top:calc(14px + env(safe-area-inset-top, 0px)); }
  #sidebar-head h1{ font-size:18px; }
  #chat-head{ padding:12px 14px; padding-top:calc(12px + env(safe-area-inset-top, 0px)); }

  /* Touch-friendly tap targets (44px minimum, Apple/Google guidance) */
  .contact{ padding:13px 14px; min-height:44px; }
  .icon-btn, #logout-btn, #theme-toggle-btn, #new-group-btn, #group-invite-btn,
  #attach-btn, #voice-btn, #emoji-btn{
    min-width:40px; min-height:40px;
  }
  #send-btn{ width:44px; height:44px; }

  .bubble{ max-width:100%; }
  .msg-row > div{ max-width:82%; }

  #messages{ padding:14px; }
  #composer{ padding:10px 12px; padding-bottom:calc(10px + env(safe-area-inset-bottom, 0px)); }

  /* Popups/panels that assumed desktop space */
  #new-chat-box, #search-messages-box{ padding-left:12px; padding-right:12px; }
  #user-results, #message-search-results{ left:12px; right:12px; }
  #new-group-panel{ padding-top:env(safe-area-inset-top, 0px); }
  #new-group-body{ padding:14px; }
  #group-member-results{ left:14px; right:14px; }

  .reaction-picker-popup{ max-width:calc(100vw - 24px); }

  #notification-prompt{
    left:12px; right:12px; transform:none; top:calc(12px + env(safe-area-inset-top, 0px));
    flex-wrap:wrap;
  }
}

@media (max-width:380px){
  #auth-card{ padding:24px 18px; }
  .contact-time, .contact-preview{ font-size:11.5px; }
}

/* ========== v2 additions: groups, attachments, reactions, presence, typing ========== */

.head-actions{ display:flex; gap:4px; align-items:center; }
#new-group-btn{
  border:none; background:none; font-size:15px; color:var(--muted); cursor:pointer;
  padding:5px 7px; border-radius:8px;
}
#new-group-btn:hover{ background:var(--paper); color:var(--accent); }

/* New group panel */
#new-group-panel{
  position:absolute; inset:0; background:var(--panel); z-index:20; display:flex; flex-direction:column;
}
#new-group-panel.hidden{ display:none; }
#new-group-head{ padding:16px 18px; border-bottom:1px solid var(--line); display:flex; align-items:center; gap:14px; }
#new-group-head button{ border:none; background:none; font-size:18px; cursor:pointer; color:var(--ink); }
#new-group-head h2{ margin:0; font-size:16px; }
#new-group-body{ padding:16px 18px; display:flex; flex-direction:column; gap:10px; position:relative; }
#new-group-body input{ padding:10px 13px; border:1px solid var(--line); border-radius:9px; font-size:14px; font-family:inherit; }
#new-group-body input:focus{ outline:2px solid var(--accent); outline-offset:1px; }
#group-member-results{
  position:absolute; left:18px; right:18px; top:104px; z-index:5;
  background:var(--panel); border:1px solid var(--line); border-radius:9px;
  box-shadow:0 6px 18px rgba(0,0,0,.08); max-height:220px; overflow-y:auto;
}
#group-selected-members{ display:flex; flex-wrap:wrap; gap:6px; }
.member-chip{
  background:var(--accent-soft); color:var(--accent); border-radius:14px; padding:5px 10px;
  font-size:12.5px; display:inline-flex; align-items:center; gap:6px; font-family:inherit;
}
.member-chip button{
  border:none; background:none; color:var(--accent); font-size:14px; cursor:pointer; line-height:1; padding:0;
}
#create-group-btn{
  padding:10px; border:none; border-radius:9px; background:var(--accent); color:#fff;
  font-weight:600; font-size:14px; cursor:pointer; margin-top:6px;
}

/* Presence dot reused from contact list, also used in chat header via JS text */
#group-invite-btn{
  margin-left:auto; border:none; background:none; font-size:17px; cursor:pointer;
  color:var(--muted); width:32px; height:32px; border-radius:50%;
}
#group-invite-btn:hover{ background:var(--paper); color:var(--accent); }
#group-invite-btn.hidden{ display:none; }

/* Sender label in group chats */
.msg-sender{
  font-size:11.5px; font-weight:600; color:var(--accent); margin:0 2px 2px;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}

/* Message actions (edit/delete/react) */
.bubble-toolbar{
  display:flex; gap:4px; opacity:.55; transition:opacity .12s ease; margin-top:2px;
  justify-content:flex-end;
}
.msg-row.them .bubble-toolbar{ justify-content:flex-start; }
.msg-row:hover .bubble-toolbar, .bubble-toolbar:focus-within{ opacity:1; }
.msg-actions{ display:flex; gap:2px; }
.msg-action-btn{
  border:none; background:var(--paper); color:var(--muted); font-size:13px; cursor:pointer;
  border-radius:6px; padding:5px 9px; line-height:1.6; min-height:28px;
}
.msg-action-btn:hover{ background:var(--line); color:var(--ink); }

.edited-tag{ font-size:10px; color:var(--muted); font-style:italic; }
.deleted-text{ font-style:italic; color:var(--muted); }

/* Reactions */
.reactions-row{ display:flex; flex-wrap:wrap; gap:4px; margin-top:3px; }
.reaction-chip{
  border:1px solid var(--line); background:var(--panel); border-radius:12px; font-size:11.5px;
  padding:2px 7px; cursor:pointer; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
.reaction-chip.mine{ background:var(--accent-soft); border-color:var(--accent); }
.reaction-chip:hover{ opacity:.85; }

.reaction-picker-popup{
  position:absolute; background:var(--panel); border:1px solid var(--line); border-radius:20px;
  padding:6px 8px; display:flex; gap:4px; box-shadow:0 6px 18px rgba(0,0,0,.14); z-index:30;
}
.reaction-picker-popup button{
  border:none; background:none; font-size:18px; cursor:pointer; border-radius:50%; padding:3px;
}
.reaction-picker-popup button:hover{ background:var(--paper); }

/* Attachments */
.msg-image{ max-width:260px; max-height:320px; border-radius:8px; display:block; margin-bottom:2px; }
.msg-audio{ max-width:230px; height:36px; }
.msg-file{
  display:flex; align-items:center; gap:6px; color:inherit; text-decoration:none; font-size:13.5px;
  padding:2px 0;
}
.msg-file:hover{ text-decoration:underline; }

#attach-btn, #voice-btn{
  border:none; background:none; font-size:19px; cursor:pointer; flex-shrink:0; width:36px; height:36px;
  border-radius:50%; display:flex; align-items:center; justify-content:center;
}
#attach-btn:hover, #voice-btn:hover{ background:var(--paper); }
#voice-btn.recording{ background:#fbe4e0; color:var(--danger); }

#voice-recording-ui{
  display:flex; align-items:center; gap:8px; padding:8px 18px; font-size:13px; color:var(--danger);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; border-top:1px solid var(--line);
}
#voice-recording-ui.hidden{ display:none; }
.rec-dot{
  width:9px; height:9px; border-radius:50%; background:var(--danger); animation:pulse 1s infinite;
}
@keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:.3; } }
#voice-cancel{
  margin-left:auto; border:none; background:none; color:var(--muted); font-size:12.5px; cursor:pointer;
  text-decoration:underline;
}

#typing-indicator{
  padding:4px 22px; font-size:12px; color:var(--muted); font-style:italic; min-height:20px;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#typing-indicator.hidden{ visibility:hidden; }

/* ========== v3 additions: dark mode toggle, message search, notifications ========== */

#theme-toggle-btn{
  border:none; background:none; font-size:15px; color:var(--muted); cursor:pointer;
  padding:5px 7px; border-radius:8px;
}
#theme-toggle-btn:hover{ background:var(--paper); }

#search-messages-box{ padding:0 14px 10px; border-bottom:1px solid var(--line); position:relative; }
#message-search-input{
  width:100%; padding:8px 12px; border:1px solid var(--line); border-radius:9px;
  background:var(--paper); font-size:13px; color:var(--ink); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#message-search-input:focus{ outline:2px solid var(--accent); outline-offset:1px; }

#message-search-results{
  display:none; position:absolute; left:14px; right:14px; top:44px; z-index:8;
  background:var(--panel); border:1px solid var(--line); border-radius:10px;
  box-shadow:0 10px 26px rgba(0,0,0,.14); max-height:320px; overflow-y:auto;
}
#message-search-results.visible{ display:block; }
.search-result-item{
  padding:10px 13px; cursor:pointer; border-bottom:1px solid var(--line);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
.search-result-item:last-child{ border-bottom:none; }
.search-result-item:hover{ background:var(--accent-soft); }
.search-result-title{ font-size:12px; font-weight:600; color:var(--accent); margin-bottom:2px; }
.search-result-snippet{ font-size:13px; color:var(--ink); line-height:1.4; }
.search-result-snippet mark{ background:#ffe49b; color:#1b1d1f; border-radius:3px; padding:0 1px; }
html[data-theme="dark"] .search-result-snippet mark{ background:#8a6c1f; color:#fff; }
.search-result-time{ font-size:10.5px; color:var(--muted); margin-top:3px; }
.search-empty{ padding:14px; text-align:center; font-size:13px; color:var(--muted); }

#notification-prompt{
  position:fixed; top:14px; left:50%; transform:translateX(-50%); z-index:50;
  background:var(--panel); border:1px solid var(--line); border-radius:12px;
  box-shadow:0 10px 26px rgba(0,0,0,.16); padding:12px 14px; display:flex; align-items:center; gap:12px;
  font-size:13.5px; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; color:var(--ink);
}
#notification-prompt.hidden{ display:none; }
#notification-prompt button{
  border:none; border-radius:7px; padding:6px 12px; font-size:12.5px; cursor:pointer; font-family:inherit;
}
#notif-allow-btn{ background:var(--accent); color:#fff; font-weight:600; }
#notif-dismiss-btn{ background:none; color:var(--muted); }
#notif-dismiss-btn:hover{ color:var(--ink); }


/* ========== v7 additions: read receipts ========== */

.ticks{
  display:inline-block; margin-left:5px; font-size:11px; letter-spacing:-2px; cursor:pointer;
  user-select:none; vertical-align:baseline; padding:2px 4px 2px 0;
  color:rgba(251,250,246,.6);
}
.ticks-some{ color:rgba(251,250,246,.95); }
.ticks-all{ color:#8fd3ff; }
.ticks:hover{ opacity:.8; }

.readby-popup{
  position:fixed; z-index:40; min-width:150px; max-width:240px; max-height:260px; overflow-y:auto;
  background:var(--panel); color:var(--ink); border:1px solid var(--line); border-radius:12px;
  box-shadow:0 10px 26px rgba(0,0,0,.18); padding:10px 14px;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
.readby-title{ font-size:11px; font-weight:700; letter-spacing:.03em; text-transform:uppercase; color:var(--accent); margin-bottom:4px; }
.readby-title-2{ margin-top:10px; color:var(--muted); }
.readby-name{ font-size:13.5px; padding:2px 0; }
.readby-empty{ font-size:13px; color:var(--muted); padding:2px 0; }

/* ========== v8 additions: voice & video calls ========== */

#call-audio-btn, #call-video-btn{
  border:none; background:none; font-size:17px; cursor:pointer; color:var(--muted);
  width:36px; height:36px; border-radius:50%; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
}
#call-audio-btn{ margin-left:auto; }
#call-audio-btn:hover, #call-video-btn:hover{ background:var(--paper); color:var(--accent); }
#call-audio-btn.hidden, #call-video-btn.hidden{ display:none; }

.call-btn{
  width:56px; height:56px; border-radius:50%; border:none; cursor:pointer; font-size:22px;
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
  background:rgba(255,255,255,.16); color:#fff; font-family:inherit; line-height:1;
}
.call-btn:hover{ background:rgba(255,255,255,.26); }
.call-btn.off{ background:#fff; color:#1b1d1f; }
.call-btn-red{ background:#d64b3a; }
.call-btn-red:hover{ background:#e25c4b; }
.call-btn-green{ background:#2fa36b; }
.call-btn-green:hover{ background:#38b77b; }
.call-btn.hidden{ display:none; }

/* Incoming call banner */
#incoming-call{
  position:fixed; top:14px; left:50%; transform:translateX(-50%); z-index:130;
  width:min(420px, calc(100vw - 24px)); background:#1f2224; color:#fff; border-radius:16px;
  padding:12px 14px; display:flex; align-items:center; gap:12px;
  box-shadow:0 14px 36px rgba(0,0,0,.35);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  top:calc(14px + env(safe-area-inset-top, 0px));
}
#incoming-call.hidden{ display:none; }
#incoming-call .incoming-text{ flex:1; min-width:0; }
#incoming-name{ font-size:15px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
#incoming-type{ font-size:12.5px; color:#b9b6ac; margin-top:2px; }
#incoming-call .call-btn{ width:46px; height:46px; font-size:19px; }

/* Active call screen */
#call-overlay{
  position:fixed; inset:0; z-index:120; background:#0f1112; color:#fff;
  display:flex; flex-direction:column; align-items:center; justify-content:center; overflow:hidden;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#call-overlay.hidden{ display:none; }
#remote-video{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; background:#0f1112; }
#call-audio-card{ position:relative; z-index:1; display:none; align-items:center; justify-content:center; }
#call-overlay:not(.connected) #call-audio-card,
#call-overlay.audio-only #call-audio-card{ display:flex; }
.call-avatar{ width:120px; height:120px; font-size:40px; }

/* Audio-only: keep the (invisible) video element alive so the remote audio still plays */
#call-overlay.audio-only #remote-video{ inset:auto; width:2px; height:2px; opacity:0; }
#call-overlay.audio-only #local-video{ display:none; }

#call-top{
  position:absolute; top:calc(22px + env(safe-area-inset-top, 0px)); left:0; right:0; z-index:2;
  text-align:center; text-shadow:0 1px 6px rgba(0,0,0,.6);
}
#call-peer-name{ font-size:20px; font-weight:600; }
#call-status{ font-size:14px; margin-top:4px; color:#d6d3c9; font-variant-numeric:tabular-nums; }

#local-video{
  position:absolute; z-index:2; right:16px; bottom:calc(110px + env(safe-area-inset-bottom, 0px));
  width:108px; height:150px; object-fit:cover; border-radius:12px; background:#222;
  border:1px solid rgba(255,255,255,.25); transform:scaleX(-1); box-shadow:0 6px 18px rgba(0,0,0,.4);
}

#call-controls{
  position:absolute; z-index:3; left:0; right:0; bottom:calc(26px + env(safe-area-inset-bottom, 0px));
  display:flex; justify-content:center; gap:20px;
}

/* Toast for call results (declined, missed, failed ...) */
#call-toast{
  position:fixed; left:50%; transform:translateX(-50%); z-index:140;
  bottom:calc(28px + env(safe-area-inset-bottom, 0px));
  max-width:min(440px, calc(100vw - 32px)); background:#1f2224; color:#fff; padding:11px 16px;
  border-radius:12px; font-size:13.5px; text-align:center; line-height:1.4;
  box-shadow:0 10px 26px rgba(0,0,0,.3); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#call-toast.hidden{ display:none; }

@media (max-width:640px){
  #call-audio-btn, #call-video-btn{ width:40px; height:40px; }
  #local-video{ width:92px; height:128px; right:12px; }
}

/* ========== v9 additions: settings + chat backgrounds ========== */

#settings-btn{
  border:none; background:none; font-size:15px; color:var(--muted); cursor:pointer;
  padding:5px 7px; border-radius:8px;
}
#settings-btn:hover{ background:var(--paper); }

/* Background layer sits behind the messages and never takes clicks */
#messages-wrap{ position:relative; flex:1; min-height:0; display:flex; flex-direction:column; overflow:hidden; }
#chat-bg{ position:absolute; inset:0; z-index:0; pointer-events:none; background-position:center; background-size:cover; }
#messages-wrap #messages{ position:relative; z-index:1; }
/* Names above bubbles (group chats) get a small pill so they stay readable on any background */
#messages-wrap.has-bg .msg-sender{
  display:inline-block; background:var(--panel); padding:1px 8px; border-radius:8px; margin-bottom:3px;
}

/* Settings window */
#settings-modal{
  position:fixed; inset:0; z-index:110; background:rgba(10,12,13,.55);
  display:flex; align-items:center; justify-content:center; padding:16px;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#settings-modal.hidden{ display:none; }
.settings-card{
  width:100%; max-width:520px; max-height:92vh; max-height:92dvh; display:flex; flex-direction:column;
  background:var(--panel); color:var(--ink); border:1px solid var(--line); border-radius:16px;
  box-shadow:0 20px 50px rgba(0,0,0,.3); overflow:hidden;
}
.settings-head{ display:flex; align-items:center; justify-content:space-between; padding:16px 18px; border-bottom:1px solid var(--line); }
.settings-head h2{ margin:0; font-size:17px; font-weight:600; }
#settings-close{ border:none; background:none; font-size:17px; cursor:pointer; color:var(--muted); width:34px; height:34px; border-radius:50%; }
#settings-close:hover{ background:var(--paper); color:var(--ink); }
.settings-body{ padding:16px 18px; overflow-y:auto; display:flex; flex-direction:column; gap:14px; }
.settings-hint{ margin:0; font-size:12.5px; color:var(--muted); line-height:1.45; }
.settings-foot{ display:flex; align-items:center; gap:8px; padding:12px 18px; border-top:1px solid var(--line); padding-bottom:calc(12px + env(safe-area-inset-bottom, 0px)); }
.settings-foot .spacer{ flex:1; }

.settings-btn{
  border:1px solid var(--line); background:var(--paper); color:var(--ink); border-radius:9px;
  padding:9px 14px; font-size:13.5px; cursor:pointer; font-family:inherit;
}
.settings-btn:hover{ border-color:var(--accent); }
.settings-btn:disabled{ opacity:.45; cursor:not-allowed; }
.settings-btn-primary{ background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600; }
.settings-btn-primary:hover{ opacity:.9; }

.seg{ display:flex; gap:4px; background:var(--paper); border-radius:10px; padding:4px; }
.seg button{
  flex:1; border:none; background:none; padding:8px; border-radius:8px; cursor:pointer;
  font-size:13.5px; color:var(--muted); font-family:inherit;
}
.seg button.active{ background:var(--panel); color:var(--ink); font-weight:600; box-shadow:0 1px 2px rgba(0,0,0,.08); }
.seg button.hidden{ display:none; }

/* Live preview */
#bg-preview{
  position:relative; height:150px; border-radius:12px; overflow:hidden; border:1px solid var(--line);
  background:var(--panel); display:flex; flex-direction:column; justify-content:center; gap:8px; padding:14px;
}
#bg-preview-layer{ position:absolute; inset:0; z-index:0; background-position:center; background-size:cover; }
.pv-msg{ position:relative; z-index:1; max-width:72%; padding:8px 12px; border-radius:14px; font-size:13.5px; line-height:1.35; }
.pv-them{ align-self:flex-start; background:var(--bubble-them); color:var(--ink); border-bottom-left-radius:4px; }
.pv-me{ align-self:flex-end; background:var(--bubble-me); color:var(--bubble-me-text); border-bottom-right-radius:4px; }

.bg-panel{ display:flex; flex-direction:column; gap:12px; }
.bg-panel.hidden{ display:none; }
#bg-presets{ display:grid; grid-template-columns:repeat(6, 1fr); gap:8px; }
.bg-swatch{ aspect-ratio:1; border-radius:10px; border:2px solid transparent; cursor:pointer; padding:0; box-shadow:inset 0 0 0 1px rgba(0,0,0,.08); }
.bg-swatch:hover{ transform:scale(1.05); }
.bg-swatch.selected{ border-color:var(--accent); box-shadow:0 0 0 2px var(--panel) inset; }
.bg-row{ display:flex; align-items:center; gap:10px; flex-wrap:wrap; font-size:13.5px; }
.bg-row > label:first-child{ min-width:62px; color:var(--muted); }
.bg-row input[type=color]{ width:44px; height:34px; padding:2px; border:1px solid var(--line); border-radius:8px; background:var(--paper); cursor:pointer; }
.bg-row input[type=color]:disabled{ opacity:.35; cursor:not-allowed; }
.bg-row input[type=range]{ flex:1; min-width:120px; accent-color:var(--accent); }
.bg-check{ display:flex; align-items:center; gap:6px; color:var(--ink); font-size:13px; cursor:pointer; }
.bg-val{ min-width:44px; text-align:right; color:var(--muted); font-variant-numeric:tabular-nums; }

@media (max-width:640px){
  #settings-modal{ padding:0; align-items:flex-end; }
  .settings-card{ max-width:none; max-height:94vh; max-height:94dvh; border-radius:16px 16px 0 0; }
  #bg-presets{ grid-template-columns:repeat(4, 1fr); }
  #settings-btn{ min-width:40px; min-height:40px; }
}

/* ========== v10: Startbildschirm, Kacheln, Befehle, buntes Design ========== */

/* Bunter: sanfter Verlauf im Hintergrund der Startseite und Akzentfarben */
:root{
  --grad-a:#4f7cff; --grad-b:#7c5cff; --grad-c:#22c3a6;
  --pop-pink:#ff5e8a; --pop-amber:#ffb84d;
}
html[data-theme="dark"]{ --grad-a:#5b8cff; --grad-b:#8f6cff; --grad-c:#2fd3b3; }

#home-screen{
  position:fixed; inset:0; z-index:5; overflow-y:auto;
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(79,124,255,.22), transparent 60%),
    radial-gradient(800px 500px at 110% 10%, rgba(255,94,138,.18), transparent 60%),
    radial-gradient(700px 500px at 50% 120%, rgba(34,195,166,.18), transparent 60%),
    var(--paper);
  padding:max(24px, env(safe-area-inset-top)) 18px max(24px, env(safe-area-inset-bottom));
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
#home-screen.hidden{ display:none; }
.home-inner{ max-width:760px; margin:0 auto; display:flex; flex-direction:column; align-items:center; gap:14px; }
.home-logo{ width:min(420px, 80vw); height:auto; margin-top:8px; }
.home-powered{ margin:0 0 10px; font-size:13px; color:var(--muted); letter-spacing:.02em; }

.home-tiles{
  width:100%; display:grid; grid-template-columns:repeat(3, 1fr); gap:12px;
}
.home-tile{
  border:none; cursor:pointer; border-radius:18px; padding:18px 10px 16px;
  display:flex; flex-direction:column; align-items:center; gap:8px; color:#fff;
  font-family:inherit; box-shadow:0 8px 20px rgba(0,0,0,.12);
  transition:transform .12s ease, box-shadow .12s ease;
  background:linear-gradient(135deg, var(--grad-a), var(--grad-b));
}
.home-tile:nth-child(3n+2){ background:linear-gradient(135deg, var(--grad-c), #1f9d86); }
.home-tile:nth-child(3n){ background:linear-gradient(135deg, var(--pop-pink), var(--pop-amber)); }
.home-tile:hover{ transform:translateY(-2px); box-shadow:0 12px 26px rgba(0,0,0,.18); }
.home-tile:active{ transform:scale(.97); }
.home-tile-icon{ font-size:30px; line-height:1; }
.home-tile-label{ font-size:14px; font-weight:600; }

.home-chats-btn{
  margin-top:8px; border:none; cursor:pointer; border-radius:999px; padding:12px 24px;
  background:var(--ink); color:var(--panel); font-size:15px; font-weight:600; font-family:inherit;
}
.home-chats-btn:hover{ opacity:.9; }

/* App-Seite (Platzhalter) */
#app-page{
  position:fixed; inset:0; z-index:6; background:var(--panel); display:flex; flex-direction:column;
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  padding-top:env(safe-area-inset-top, 0px);
}
#app-page.hidden{ display:none; }
#app-page-head{ display:flex; align-items:center; gap:12px; padding:14px 18px; border-bottom:1px solid var(--line); }
#app-page-head h2{ margin:0; font-size:17px; }
#app-page-back{ border:none; background:none; font-size:20px; cursor:pointer; color:var(--ink); width:36px; height:36px; border-radius:50%; }
#app-page-back:hover{ background:var(--paper); }
#app-page-body{ flex:1; display:flex; align-items:center; justify-content:center; padding:24px; }
.app-page-card{ text-align:center; max-width:360px; color:var(--ink); }
.app-page-icon{ font-size:56px; margin-bottom:10px; }
.app-page-card p{ margin:8px 0; font-size:14.5px; line-height:1.5; }
.app-page-hint{ color:var(--muted); font-size:13px; }

/* Befehls-Vorschlag über der Eingabe */
#cmd-suggest{
  display:flex; gap:6px; flex-wrap:wrap; padding:8px 14px; border-top:1px solid var(--line); background:var(--panel);
}
#cmd-suggest.hidden{ display:none; }
.cmd-item{
  border:1px solid var(--line); background:var(--paper); color:var(--ink); border-radius:999px;
  padding:6px 12px; font-size:13px; cursor:pointer; font-family:inherit;
}
.cmd-item:hover{ border-color:var(--accent); color:var(--accent); }

/* Bunter im Chat: Akzent-Verlauf auf eigenen Nachrichten */
.msg-row.me .bubble{ background:linear-gradient(135deg, var(--grad-a), var(--grad-b)); color:#fff; }
.msg-row.me .msg-time, .msg-row.me .ticks{ color:rgba(255,255,255,.85); }
.contact.active{ background:linear-gradient(90deg, rgba(79,124,255,.14), rgba(124,92,255,.10)); }
.avatar{ background-image:linear-gradient(135deg, var(--grad-a), var(--grad-c)); }

@media (max-width:640px){
  .home-tiles{ grid-template-columns:repeat(3, 1fr); gap:10px; }
  .home-tile{ padding:14px 6px 12px; border-radius:16px; }
  .home-tile-icon{ font-size:26px; }
  .home-tile-label{ font-size:12.5px; }
}

/* ========== v11: Authenticator + Social ========== */
.feature-wrap{ width:100%; max-width:560px; margin:0 auto; padding:4px 2px 24px; display:flex; flex-direction:column; gap:12px; color:var(--ink); font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; }
.feature-hint{ font-size:13px; color:var(--muted); margin:0; line-height:1.45; }
.feature-warn{ color:var(--danger); }
.feature-h{ font-size:14px; margin:14px 0 4px; color:var(--accent); text-transform:uppercase; letter-spacing:.04em; }
.feature-form{ display:flex; flex-direction:column; gap:8px; }
.feature-form input, .feature-form textarea{ padding:11px 13px; border:1px solid var(--line); border-radius:10px; background:var(--paper); color:var(--ink); font-size:16px; font-family:inherit; }
.feature-form input:focus, .feature-form textarea:focus{ outline:2px solid var(--accent); outline-offset:1px; }
.feature-btn{ border:none; border-radius:10px; padding:11px 16px; background:linear-gradient(135deg, var(--grad-a), var(--grad-b)); color:#fff; font-weight:600; font-size:14px; cursor:pointer; font-family:inherit; }
.feature-btn.small{ padding:7px 12px; font-size:12.5px; }
.feature-btn.ghost{ background:var(--paper); color:var(--ink); border:1px solid var(--line); }
.feature-btn:hover{ opacity:.9; }

.auth-row{ display:flex; justify-content:space-between; align-items:center; gap:12px; padding:14px 16px; border-radius:14px; background:linear-gradient(135deg, rgba(79,124,255,.10), rgba(34,195,166,.10)); border:1px solid var(--line); }
.auth-name{ font-size:14px; font-weight:600; }
.auth-code{ font-size:26px; font-weight:700; letter-spacing:.08em; font-variant-numeric:tabular-nums; color:var(--accent); margin-top:2px; }
.auth-side{ display:flex; flex-direction:column; align-items:flex-end; gap:6px; }
.auth-ring{ font-size:12px; color:var(--muted); font-variant-numeric:tabular-nums; }
.auth-del{ border:none; background:none; cursor:pointer; font-size:15px; color:var(--muted); }
.auth-del:hover{ color:var(--danger); }

.social-profile{ display:flex; align-items:center; gap:12px; }
.social-avatar{ width:56px; height:56px; font-size:18px; }
.social-name{ font-size:17px; font-weight:600; }
.social-bio{ margin:0; font-size:14px; line-height:1.5; }
.soc-row{ display:flex; align-items:center; gap:8px; padding:10px 12px; border:1px solid var(--line); border-radius:12px; background:var(--panel); flex-wrap:wrap; }
.soc-row > span{ flex:1; min-width:120px; font-size:14px; }
#soc-find-results{ display:flex; flex-direction:column; gap:6px; }