:root{
  --bg:#000;
  --surface:#141416;
  --surface-2:#1c1c1e;
  --border:rgba(255,255,255,.08);
  --text:#f5f5f7;
  --text-dim:#a1a1a6;
  --text-mute:#6e6e73;
  --accent:#0a84ff;
  --accent-grad:linear-gradient(180deg,#3aa0ff 0%,#0a84ff 100%);
  --green:#30d158;
  --red:#ff453a;
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bot:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
[hidden]{display:none !important}
html,body{
  height:100%;background:#000;color:var(--text);overflow:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue","Segoe UI",sans-serif;
  font-size:15px;user-select:none;
}
input,textarea{user-select:text;-webkit-user-select:text}
button{font-family:inherit;background:none;border:none;color:inherit;cursor:pointer}

.screen-full{position:fixed;inset:0;z-index:100;background:#000;display:flex;flex-direction:column}

/* ---------- LOGIN ---------- */
#login{
  align-items:center;justify-content:center;padding:40px 24px;
  background:radial-gradient(1000px 500px at 50% 30%,#0a1a2e 0%,#000 60%);
}
.login-card{width:100%;max-width:360px;text-align:center}
.login-logo{margin-bottom:22px;display:flex;justify-content:center}
.login-title{font-size:40px;font-weight:600;letter-spacing:-.03em;margin-bottom:6px}
.login-sub{color:var(--text-dim);font-size:15px;margin-bottom:26px}
#token-input{
  width:100%;background:var(--surface);border:.5px solid var(--border);
  color:var(--text);font-size:16px;padding:14px 18px;border-radius:14px;
  outline:none;text-align:center;font-family:ui-monospace,Menlo,Consolas,monospace;
  letter-spacing:.05em;
}
#token-input:focus{border-color:var(--accent)}
#token-go{
  margin-top:12px;width:100%;background:var(--accent-grad);color:#fff;
  padding:14px;font-size:16px;font-weight:600;border-radius:14px;
}
.login-hint{margin-top:16px;font-size:12px;color:var(--text-mute)}

/* ---------- APP LAYOUT ---------- */
#app{position:fixed;inset:0;display:flex;flex-direction:column}
.view{position:absolute;inset:0;display:none;flex-direction:column;background:#000}
#chat-view{display:flex}

/* ---------- CHAT HEADER ---------- */
.chat-header{
  display:flex;align-items:center;gap:8px;
  padding:calc(var(--safe-top) + 8px) 14px 12px;
  border-bottom:.5px solid var(--border);
  background:rgba(0,0,0,.75);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  z-index:5;
}
.hb{
  width:36px;height:36px;border-radius:50%;color:var(--accent);
  display:flex;align-items:center;justify-content:center;
}
.hb:active{background:rgba(255,255,255,.08)}
.chat-name{flex:1;text-align:center;padding:0 4px}
.cn-name{font-size:17px;font-weight:600;letter-spacing:-.01em}
.cn-status{font-size:12px;color:var(--text-mute);margin-top:1px}
.cn-status.online{color:var(--green)}

/* ---------- MESSAGES ---------- */
.messages{
  flex:1;overflow-y:auto;padding:14px 12px;
  display:flex;flex-direction:column;gap:2px;
  -webkit-overflow-scrolling:touch;
}
.date-sep{
  text-align:center;color:var(--text-mute);font-size:11px;margin:14px 0 6px;
  font-weight:500;
}
.date-sep b{color:var(--text-dim);font-weight:600}

.msg{max-width:78%;display:flex;flex-direction:column;margin-top:2px;animation:pop .18s ease-out}
.msg.first{margin-top:8px}
@keyframes pop{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

.bubble{
  padding:8px 14px;border-radius:20px;font-size:15px;line-height:1.35;
  word-wrap:break-word;overflow-wrap:anywhere;
}
.msg.them{align-self:flex-start}
.msg.them .bubble{background:var(--surface-2);color:#fff;border-bottom-left-radius:6px}
.msg.them.grouped .bubble{border-bottom-left-radius:20px;border-top-left-radius:6px}
.msg.me{align-self:flex-end;align-items:flex-end}
.msg.me .bubble{background:var(--accent-grad);color:#fff;border-bottom-right-radius:6px}
.msg.me.grouped .bubble{border-bottom-right-radius:20px;border-top-right-radius:6px}
.time{font-size:10px;color:var(--text-mute);margin-top:4px;padding:0 6px}
.msg.me .time{text-align:right}

.msg .att{border-radius:18px;overflow:hidden;max-width:240px;background:var(--surface-2)}
.msg .att img,.msg .att video{display:block;width:100%;height:auto;max-height:320px;object-fit:cover}

/* typing indicator */
.typing-row{padding:0 14px 4px;display:flex}
.typing{background:var(--surface-2);padding:10px 14px;border-radius:20px;border-bottom-left-radius:6px;display:flex;gap:4px}
.typing span{width:6px;height:6px;background:var(--text-mute);border-radius:50%;animation:tp 1.4s infinite ease-in-out both}
.typing span:nth-child(2){animation-delay:.16s}
.typing span:nth-child(3){animation-delay:.32s}
@keyframes tp{0%,80%,100%{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}

/* composer */
.composer{
  padding:8px 12px calc(var(--safe-bot) + 12px);display:flex;gap:8px;align-items:flex-end;
  background:rgba(0,0,0,.75);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-top:.5px solid var(--border);
}
.plus-btn{
  width:32px;height:32px;border-radius:50%;background:var(--surface-2);
  color:var(--text-dim);display:flex;align-items:center;justify-content:center;
  flex-shrink:0;cursor:pointer;
}
.input-wrap{
  flex:1;background:var(--surface);border:.5px solid var(--border);
  border-radius:20px;padding:2px 4px 2px 14px;
  display:flex;align-items:center;gap:4px;min-height:36px;
}
.input-wrap input{
  flex:1;background:transparent;border:none;color:var(--text);font-size:16px;
  outline:none;padding:6px 0;font-family:inherit;
}
.send-btn{
  width:30px;height:30px;border-radius:50%;background:var(--accent-grad);
  color:#fff;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;padding-left:2px;
}

/* ---------- INCOMING CALL ---------- */
#incoming-call{align-items:center;justify-content:space-between;padding:80px 30px 60px}
.ring-bg{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(ellipse 70% 50% at 50% 30%,#3a2028 0%,transparent 60%),
    radial-gradient(ellipse 60% 40% at 50% 90%,#20102a 0%,transparent 60%),
    #08050a;
}
.ring-top{text-align:center;padding-top:20px;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.7}}
.ring-label{font-size:14px;color:var(--text-dim);margin-bottom:12px;letter-spacing:.02em}
.ring-name{font-size:38px;font-weight:600;letter-spacing:-.02em;color:#fff}
.ring-controls{display:flex;gap:80px;justify-content:center;padding-bottom:20px}
.ring-btn{
  width:70px;height:70px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.4);
}
.ring-btn.accept{background:var(--green)}
.ring-btn.decline{background:var(--red)}
.ring-btn:active{transform:scale(.94)}

/* ---------- CALL VIEW ---------- */
#call-view{background:#000;overflow:hidden}
#remote-video{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000;z-index:1;
}
#remote-audio{position:absolute;width:0;height:0;opacity:0;pointer-events:none}
.call-video-placeholder{
  position:absolute;inset:0;z-index:1;pointer-events:none;
}
.call-video-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 60% 45% at 50% 38%,#4a3a48 0%,#2a1c28 40%,#08050a 80%),
    #050508;
}
#local-video{
  position:absolute;top:calc(var(--safe-top) + 80px);right:14px;
  width:100px;height:140px;border-radius:14px;object-fit:cover;
  background:#101828;border:.5px solid rgba(255,255,255,.1);
  box-shadow:0 8px 24px rgba(0,0,0,.5);z-index:3;
  transform:scaleX(-1);
}
.call-top{
  position:absolute;top:calc(var(--safe-top) + 20px);left:0;right:0;
  z-index:2;text-align:center;padding:0 20px;
  transition:opacity .35s ease;
}
.call-name{font-size:24px;font-weight:500;color:#fff;text-shadow:0 2px 10px rgba(0,0,0,.6)}
.call-time{font-size:14px;color:rgba(255,255,255,.8);margin-top:2px;font-variant-numeric:tabular-nums;text-shadow:0 2px 6px rgba(0,0,0,.6)}
.call-status{font-size:12px;color:rgba(255,255,255,.6);margin-top:6px;text-shadow:0 1px 4px rgba(0,0,0,.6);letter-spacing:.05em;text-transform:uppercase}
.call-controls{
  position:absolute;bottom:calc(var(--safe-bot) + 30px);left:0;right:0;z-index:3;
  display:flex;justify-content:center;gap:12px;padding:0 16px;
  transition:opacity .35s ease;
}
.call-btn{
  width:60px;height:60px;border-radius:50%;
  background:rgba(255,255,255,.14);
  backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);
  border:.5px solid rgba(255,255,255,.12);
  color:#fff;display:flex;align-items:center;justify-content:center;
  transition:transform .12s,background .12s;
}
.call-btn:active{transform:scale(.94)}
.call-btn.on{background:#fff;color:#000}
.call-btn.end{background:var(--red);border-color:transparent;box-shadow:0 6px 18px rgba(255,69,58,.35)}

#call-view.hide-ui .call-top,#call-view.hide-ui .call-controls{opacity:0;pointer-events:none}

/* ---------- SETTINGS SHEET ---------- */
.sheet{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.5);display:flex;align-items:flex-end;justify-content:center;animation:fade .2s ease-out}
@keyframes fade{from{opacity:0}to{opacity:1}}
.sheet-inner{
  width:100%;max-width:500px;background:#1c1c1e;border-radius:22px 22px 0 0;
  padding:8px 22px calc(var(--safe-bot) + 22px);
  animation:slide .25s ease-out;
}
@keyframes slide{from{transform:translateY(30px)}to{transform:none}}
.sheet-handle{width:36px;height:4px;background:rgba(255,255,255,.2);border-radius:2px;margin:0 auto 14px}
.sheet-title{font-size:20px;font-weight:600;text-align:center;margin-bottom:18px;letter-spacing:-.01em}
.field{display:block;margin-bottom:14px}
.field span{display:block;font-size:12px;color:var(--text-mute);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;padding-left:2px}
.field input{
  width:100%;background:#141416;border:.5px solid var(--border);
  color:var(--text);font-size:16px;padding:12px 14px;border-radius:12px;
  outline:none;font-family:inherit;
}
.field input:focus{border-color:var(--accent)}
.sheet-btn{
  width:100%;padding:14px;border-radius:12px;background:#141416;
  color:var(--text);font-size:16px;font-weight:500;margin-bottom:8px;
}
.sheet-btn:active{background:#0a0a0c}
.sheet-btn.primary{background:var(--accent-grad);color:#fff;font-weight:600}
.sheet-btn.danger{color:var(--red)}