*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#0f0f13;--sur:#1a1a24;--sur2:#22222f;
  --acc:#6c63ff;--acc2:#a78bfa;
  --txt:#e8e8f0;--muted:#888899;
  --bme:#6c63ff;--bthem:#22222f;
  --bdr:#2a2a3a;--red:#ff5c5c;
  --r:16px;--f:'Segoe UI',system-ui,-apple-system,sans-serif;
  /* Safe area insets for notch/home bar on iOS */
  --sat: env(safe-area-inset-top, 0px);
  --sab: env(safe-area-inset-bottom, 0px);
  --sal: env(safe-area-inset-left, 0px);
  --sar: env(safe-area-inset-right, 0px);
}

/* Use min-height instead of height to avoid iOS keyboard issues */
html{ height: -webkit-fill-available; }
body{
  background:var(--bg);color:var(--txt);font-family:var(--f);
  min-height:100vh;
  min-height:-webkit-fill-available;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  -webkit-text-size-adjust:100%; /* prevent iOS font scaling */
}

/* ── Join ── */
#join-screen{display:flex;align-items:center;justify-content:center;width:100%;height:100%;padding:20px;padding-bottom:calc(20px + var(--sab))}
.join-box{background:var(--sur);border:1px solid var(--bdr);border-radius:var(--r);padding:40px 36px;width:100%;max-width:400px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.logo{font-size:48px;margin-bottom:12px}
.join-box h1{font-size:28px;font-weight:700;background:linear-gradient(135deg,var(--acc),var(--acc2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}
.join-box p{color:var(--muted);font-size:14px;margin-bottom:28px;line-height:1.5}
/* font-size:16px prevents iOS auto-zoom on input focus */
.join-box input{width:100%;padding:14px 16px;background:var(--sur2);border:1px solid var(--bdr);border-radius:10px;color:var(--txt);font-size:16px;outline:none;transition:border-color .2s;margin-bottom:12px;-webkit-appearance:none;appearance:none}
.join-box input:focus{border-color:var(--acc)}
/* min 44px touch target */
.join-box button{width:100%;padding:14px;min-height:44px;background:var(--acc);color:#fff;border:none;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;transition:background .2s;-webkit-tap-highlight-color:transparent}
.join-box button:active{opacity:.85}
#join-error{display:block;color:var(--red);font-size:13px;margin-top:10px;min-height:18px}

/* ── Chat screen ── */
#chat-screen{
  display:flex;flex-direction:column;
  width:100%;max-width:700px;
  /* Fill viewport accounting for iOS safe areas */
  height:100vh;
  height:-webkit-fill-available;
  padding-top:var(--sat);
  padding-bottom:var(--sab);
  padding-left:var(--sal);
  padding-right:var(--sar);
}
.hidden{display:none!important}

/* ── Header ── */
header{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 16px;background:var(--sur);
  border-bottom:1px solid var(--bdr);flex-shrink:0;gap:6px;
  min-height:54px;
}
.header-left{display:flex;align-items:center;gap:6px;flex-shrink:0}
.logo-icon{font-size:20px}
.room-name{font-weight:700;font-size:15px;color:var(--txt);white-space:nowrap}
#conn-dot{flex-shrink:0}
.header-center{display:flex;align-items:center;justify-content:center;flex:1;padding:0 6px}
.header-right{display:flex;align-items:center;gap:5px;flex-shrink:0}

/* ── Header icon buttons — 44px min touch target ── */
.hbtn{
  width:38px;height:38px;min-width:38px;min-height:38px;
  border-radius:10px;border:1px solid var(--bdr);
  cursor:pointer;display:flex;align-items:center;justify-content:center;
  font-size:15px;background:var(--sur2);color:var(--muted);
  flex-shrink:0;-webkit-tap-highlight-color:transparent;
  transition:background .15s,box-shadow .15s;
}
.hbtn:active{opacity:.7}
.hbtn-divider{width:1px;height:20px;background:var(--bdr);margin:0 2px;flex-shrink:0}

/* Voice call — green glow */
.call-voice{background:rgba(52,211,153,.12);color:#34d399;border-color:rgba(52,211,153,.4)}
.call-voice:active{background:rgba(52,211,153,.3)}
@media(hover:hover){
  .call-voice:hover{background:rgba(52,211,153,.25);border-color:rgba(52,211,153,.7);box-shadow:0 0 16px rgba(52,211,153,.5)}
}

/* Video call — purple glow */
.call-video{background:rgba(129,140,248,.12);color:#818cf8;border-color:rgba(129,140,248,.4)}
.call-video:active{background:rgba(129,140,248,.3)}
@media(hover:hover){
  .call-video:hover{background:rgba(129,140,248,.25);border-color:rgba(129,140,248,.7);box-shadow:0 0 16px rgba(129,140,248,.5)}
}

@media(hover:hover){
  .hbtn:hover{transform:translateY(-1px)}
  #refresh-btn:hover{background:rgba(108,99,255,.18);color:var(--acc2);border-color:rgba(108,99,255,.4)}
  #clear-btn:hover{background:rgba(255,92,92,.15);color:var(--red);border-color:rgba(255,92,92,.4)}
  #leave-btn:hover{background:rgba(255,92,92,.15);color:var(--red);border-color:rgba(255,92,92,.5)}
}
#leave-btn{border-color:rgba(255,92,92,.2)}

/* ── Connection dot ── */
.dot-online,.dot-offline{width:8px;height:8px;border-radius:50%;display:inline-block;transition:background .3s;flex-shrink:0}
.dot-online{background:#34d399}
.dot-offline{background:var(--red);animation:pulse 1s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

#online-badge{font-size:12px;color:var(--muted);background:var(--sur2);padding:4px 10px;border-radius:20px;white-space:nowrap;border:1px solid var(--bdr)}

/* ── Messages ── */
#messages{
  flex:1;overflow-y:auto;overflow-x:hidden;
  padding:16px;display:flex;flex-direction:column;gap:6px;
  scroll-behavior:smooth;
  -webkit-overflow-scrolling:touch; /* smooth scroll on iOS */
  overscroll-behavior:contain;
}
#messages::-webkit-scrollbar{width:4px}
#messages::-webkit-scrollbar-thumb{background:var(--bdr);border-radius:4px}

.row{display:flex;flex-direction:column;max-width:75%}
.row.me{align-self:flex-end;align-items:flex-end}
.row.them{align-self:flex-start;align-items:flex-start}
.row.pop{animation:fadeUp .2s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

.who{font-size:11px;color:var(--muted);margin-bottom:3px;padding:0 4px}
.bubble{padding:10px 14px;border-radius:14px;font-size:15px;line-height:1.5;word-break:break-word}
.me   .bubble{background:var(--bme);color:#fff;border-bottom-right-radius:4px}
.them .bubble{background:var(--bthem);color:var(--txt);border-bottom-left-radius:4px;border:1px solid var(--bdr)}
.ts{font-size:10px;color:var(--muted);margin-top:3px;padding:0 4px}
.sys{align-self:center;font-size:12px;color:var(--muted);background:var(--sur2);padding:4px 12px;border-radius:20px;margin:4px 0;text-align:center}

/* ── Typing ── */
#typing-bar{min-height:22px;padding:2px 16px;flex-shrink:0;font-size:12px;color:var(--acc2);font-style:italic}

/* ── Message form ── */
#msg-form{
  display:flex;gap:8px;
  padding:10px 16px;
  padding-bottom:calc(10px + var(--sab));
  background:var(--sur);border-top:1px solid var(--bdr);flex-shrink:0;
}
/* font-size:16px prevents iOS auto-zoom */
#msg-input{
  flex:1;padding:12px 16px;
  background:var(--sur2);border:1px solid var(--bdr);
  border-radius:24px;color:var(--txt);font-size:16px;
  outline:none;transition:border-color .2s;
  -webkit-appearance:none;appearance:none;
  min-height:44px;
}
#msg-input:focus{border-color:var(--acc)}
#msg-form button{
  padding:12px 18px;background:var(--acc);color:#fff;
  border:none;border-radius:24px;font-size:15px;font-weight:600;
  cursor:pointer;white-space:nowrap;min-height:44px;
  -webkit-tap-highlight-color:transparent;
}
#msg-form button:active{opacity:.85}

/* ── Clear modal ── */
#modal{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-box{background:var(--sur);border:1px solid var(--bdr);border-radius:var(--r);padding:28px 24px;max-width:340px;width:100%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.6)}
.modal-box p{font-size:16px;margin-bottom:20px;line-height:1.5}
.modal-btns{display:flex;gap:10px;justify-content:center}
.modal-btns button{padding:12px 24px;min-height:44px;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;-webkit-tap-highlight-color:transparent}
#modal-yes{background:var(--red);color:#fff}
#modal-no{background:var(--sur2);color:var(--txt);border:1px solid var(--bdr)}

/* ── Call overlay — mini floating card ── */
#call-overlay{
  position:fixed;
  top:50%;left:50%;
  transform:translate(-50%,-50%);
  z-index:200;
  width:calc(100% - 32px);
  max-width:320px;
  pointer-events:none;
}
#call-overlay:not(.hidden){pointer-events:all}
.call-box{
  background:linear-gradient(160deg,#1a1a2e 0%,#16213e 100%);
  border:1px solid rgba(108,99,255,.3);
  border-radius:24px;
  padding:28px 24px 24px;
  width:100%;text-align:center;
  box-shadow:0 8px 40px rgba(0,0,0,.7),0 0 0 1px rgba(108,99,255,.15);
  animation:callPop .2s ease;
}
@keyframes callPop{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}

.call-avatar{
  width:80px;height:80px;border-radius:50%;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  display:flex;align-items:center;justify-content:center;
  font-size:32px;margin:0 auto 16px;
  animation:ringPulse 1.8s ease-in-out infinite;
}
@keyframes ringPulse{
  0%  {box-shadow:0 0 0 0 rgba(108,99,255,.6)}
  70% {box-shadow:0 0 0 20px rgba(108,99,255,0)}
  100%{box-shadow:0 0 0 0 rgba(108,99,255,0)}
}

.call-name{font-size:20px;font-weight:800;color:#fff;margin-bottom:4px;letter-spacing:-.02em}
.call-status{font-size:13px;color:rgba(255,255,255,.4);margin-bottom:6px}
.call-duration{font-size:20px;font-weight:700;color:var(--acc2);min-height:28px;margin-bottom:20px;font-variant-numeric:tabular-nums;letter-spacing:.06em}

.call-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.call-action-group{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.call-action-wrap{display:flex;flex-direction:column;align-items:center;gap:6px}
.call-action-label{font-size:11px;color:rgba(255,255,255,.4)}

.call-dots{display:flex;justify-content:center;gap:6px;margin-bottom:16px}
.call-dots span{width:7px;height:7px;border-radius:50%;background:var(--acc2);animation:dotBounce 1.2s infinite ease-in-out}
.call-dots span:nth-child(2){animation-delay:.2s}
.call-dots span:nth-child(3){animation-delay:.4s}
@keyframes dotBounce{0%,80%,100%{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}

/* 64px touch targets for call buttons on mobile */
.call-action-btn{
  width:64px;height:64px;border-radius:50%;border:none;
  font-size:24px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  -webkit-tap-highlight-color:transparent;
  transition:transform .15s,box-shadow .15s;
}
.call-action-btn:active{transform:scale(.92)}
@media(hover:hover){.call-action-btn:hover{transform:scale(1.1)}}

.call-action-btn.accept{background:linear-gradient(135deg,#34d399,#059669);box-shadow:0 6px 24px rgba(52,211,153,.5)}
.call-action-btn.decline{background:linear-gradient(135deg,#ff5c5c,#dc2626);box-shadow:0 6px 24px rgba(255,92,92,.5)}
.call-action-btn.hangup{background:linear-gradient(135deg,#ff5c5c,#dc2626);box-shadow:0 6px 24px rgba(255,92,92,.5)}
.call-action-btn.mute{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.15)}
.call-action-btn.cam{background:rgba(129,140,248,.12);color:#818cf8;border:1px solid rgba(129,140,248,.3)}

/* Video box */
.video-box{position:relative;width:100%;border-radius:16px;overflow:hidden;background:#000;margin-bottom:16px;aspect-ratio:4/3;box-shadow:0 8px 32px rgba(0,0,0,.6)}
#remote-video{width:100%;height:100%;object-fit:cover}
.local-video{position:absolute;bottom:8px;right:8px;width:80px;border-radius:8px;border:2px solid rgba(255,255,255,.2);box-shadow:0 4px 14px rgba(0,0,0,.5)}

/* ── Mobile overrides ── */
@media(max-width:480px){
  .join-box{padding:28px 20px}
  .row{max-width:88%}
  #msg-form button{padding:12px 14px}
  /* Hide online badge text on very small screens, keep badge */
  .header-center{display:none}
  /* Tighter header */
  header{padding:8px 12px;gap:4px}
  .room-name{font-size:14px}
}

@media(max-width:360px){
  .hbtn{width:34px;height:34px;font-size:14px}
  #refresh-btn,#clear-btn{display:none} /* hide less critical buttons on tiny screens */
}