:root{
  --bg:#0d0e12;            /* obsidian app bg */
  --bg-elev:#16181f;       /* panels / modals */
  --surface:#1b1e26;       /* tiles, inputs */
  --surface-2:#232733;     /* buttons */
  --surface-3:#2c313f;     /* hover */
  --line:rgba(255,255,255,.07);
  --line-2:rgba(255,255,255,.12);
  --accent:#8b5cf6; --accent-2:#6366f1;
  --grad:linear-gradient(135deg,#8b5cf6,#6366f1);
  --green:#2fb37a; --green-2:#1f9d68;
  --red:#e5484d; --red-h:#c93b40;
  --txt:#ecedf2; --muted:#9aa1ad; --muted-2:#6f7682;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;color:var(--txt);
  font-family:"Inter","gg sans","Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  background:radial-gradient(120% 100% at 50% -20%,#1a1530 0%,#0d0e12 55%),var(--bg);
  -webkit-font-smoothing:antialiased;
}

/* ---- buttons (hover = cheap transform only) ---- */
.btn{cursor:pointer;border:none;border-radius:10px;padding:12px 22px;font-size:15px;font-weight:600;color:#fff;background:var(--grad);
  box-shadow:0 8px 24px rgba(99,102,241,.28),inset 0 1px 0 rgba(255,255,255,.12);transition:transform .12s ease}
.btn:hover{transform:translateY(-1px);filter:brightness(1.08)}
.btn:active{transform:translateY(0)}
.btn.join{background:linear-gradient(135deg,#34c98a,#1f9d68);box-shadow:0 8px 24px rgba(47,179,122,.28),inset 0 1px 0 rgba(255,255,255,.14)}
.btn.ghost{background:var(--surface-2);border:1px solid var(--line);box-shadow:none;color:var(--txt)}
.btn.ghost:hover{background:var(--surface-3);filter:none}
.btn.big-btn{padding:14px 28px;font-size:16px}

/* ---- Landing ---- */
.landing{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px}
.landing .logo{font-size:62px;margin-bottom:10px;filter:drop-shadow(0 6px 24px rgba(124,92,246,.4))}
.landing h1{font-size:28px;margin:6px 0;font-weight:700;letter-spacing:-.01em}
.landing p{color:var(--muted);max-width:430px;margin:0 0 28px;line-height:1.55}

/* ---- Call stage ---- */
.stage{position:fixed;inset:0;overflow:hidden;background:var(--bg)}
.tiles{position:absolute;inset:0;display:grid;gap:14px;padding:18px}
.tiles.equal{grid-template-columns:1fr 1fr}
@media (max-width:820px){.tiles.equal{grid-template-columns:1fr;grid-template-rows:1fr 1fr}}
.tile{position:relative;border-radius:14px;overflow:hidden;background:var(--surface);border:1px solid var(--line);box-shadow:0 12px 40px rgba(0,0,0,.4)}
.tile video{width:100%;height:100%;object-fit:contain;background:#000;display:block;transform:scaleX(-1)}
.tile.remote video{transform:none}
.nametag{position:absolute;left:12px;bottom:12px;z-index:2;padding:4px 11px;border-radius:8px;background:rgba(10,11,15,.8);border:1px solid var(--line);font-size:13px;font-weight:600;color:#fff}

/* spotlight mode: remote fullscreen, local = draggable PiP */
.tiles.spotlight{display:block;padding:0}
.tiles.spotlight .tile.remote{position:absolute;inset:0;border-radius:0;border:none;box-shadow:none}
.tiles.spotlight .tile.local{
  position:absolute;width:210px;height:130px;border-radius:14px;z-index:5;cursor:grab;
  border:1px solid var(--line-2);box-shadow:0 12px 36px rgba(0,0,0,.6);
  transition:left .18s ease,top .18s ease,right .18s ease,bottom .18s ease;
}
.tiles.spotlight .tile.local.dragging{transition:none;cursor:grabbing}
@media (max-width:820px){.tiles.spotlight .tile.local{width:122px;height:164px}}

/* top chips — auto-hide during call (no backdrop-filter for perf) */
.chips{position:absolute;top:16px;left:16px;display:flex;gap:8px;z-index:6;transition:opacity .25s}
.chip{display:flex;align-items:center;gap:7px;padding:7px 13px;border-radius:10px;font-size:13px;font-weight:500;color:var(--txt);background:rgba(24,26,33,.92);border:1px solid var(--line)}
.chip.btn-chip{cursor:pointer}
.chip.btn-chip:hover{background:rgba(36,40,52,.95);border-color:var(--line-2)}
.chip .dot{width:8px;height:8px;border-radius:50%;background:var(--green)}
.chip .dot.bad{background:var(--red)}

/* bottom controls — auto-hide during call (no backdrop-filter) */
.controls{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;gap:12px;z-index:6;padding:9px 13px;border-radius:18px;background:rgba(22,24,31,.94);border:1px solid var(--line);box-shadow:0 12px 40px rgba(0,0,0,.5);transition:opacity .25s}
.ctrl{width:50px;height:50px;border-radius:50%;border:1px solid var(--line);background:var(--surface-2);color:var(--txt);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .15s ease,transform .1s ease}
.ctrl:hover{background:var(--surface-3);transform:translateY(-1px)}
.ctrl svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ctrl.off{background:var(--red);border-color:transparent;color:#fff} .ctrl.off:hover{background:var(--red-h)}
.ctrl.active{background:var(--grad);border-color:transparent;color:#fff} .ctrl.active:hover{filter:brightness(1.08)}
.ctrl.hangup{background:var(--red);border-color:transparent;color:#fff} .ctrl.hangup:hover{background:var(--red-h)}
@media (max-width:820px){.ctrl{width:46px;height:46px}}

.chips.ui-hidden,.controls.ui-hidden{opacity:0;pointer-events:none}

/* overlays + premium modal panel (no backdrop-filter) */
.overlay{position:absolute;inset:0;z-index:10;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(6,7,10,.84)}
.overlay.show{display:flex}
.panel{background:linear-gradient(180deg,#1a1d25,#15171d);border:1px solid var(--line);border-radius:18px;padding:34px 30px;text-align:center;max-width:420px;width:100%;
  box-shadow:0 24px 70px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.05);display:flex;flex-direction:column;align-items:center}
.panel .logo{font-size:54px;margin-bottom:8px;filter:drop-shadow(0 6px 22px rgba(124,92,246,.4))}
.panel .big{font-size:50px;margin-bottom:6px}
.panel h2{margin:6px 0;font-size:22px;font-weight:700;letter-spacing:-.01em}
.panel p{color:var(--muted);margin:0 0 24px;line-height:1.55}
.panel .btn{width:100%;margin-bottom:10px}
.panel .btn:last-child{margin-bottom:0}

/* waiting card — non-blocking, centered, while alone in the call */
.card{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(.98);z-index:7;display:none;flex-direction:column;align-items:center;text-align:center;
  padding:28px 30px;border-radius:18px;background:linear-gradient(180deg,#1a1d25,#15171d);border:1px solid var(--line);
  box-shadow:0 24px 70px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.05);max-width:380px;width:calc(100% - 40px);opacity:0;transition:opacity .2s,transform .2s}
.card.show{display:flex;opacity:1;transform:translate(-50%,-50%) scale(1)}
.card .big{font-size:46px;margin-bottom:6px}
.card h2{margin:4px 0;font-size:20px;font-weight:700}
.card p{color:var(--muted);margin:0 0 22px;line-height:1.55}
.card .btn{width:100%}

/* toast */
.toast{position:absolute;bottom:100px;left:50%;transform:translateX(-50%) translateY(10px);z-index:11;padding:11px 20px;border-radius:10px;
  background:rgba(24,26,33,.97);border:1px solid var(--line-2);color:#fff;font-size:14px;font-weight:500;opacity:0;pointer-events:none;
  transition:opacity .2s,transform .2s;box-shadow:0 10px 30px rgba(0,0,0,.5);max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* chat panel */
.chat{position:absolute;top:0;right:0;bottom:0;width:344px;max-width:88vw;z-index:8;display:flex;flex-direction:column;background:var(--bg-elev);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .2s;box-shadow:-8px 0 40px rgba(0,0,0,.4)}
.chat.show{transform:translateX(0)}
.chat-head{padding:16px 18px;border-bottom:1px solid var(--line);font-weight:700;font-size:16px}
.chat-msgs{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:8px}
.msg{max-width:82%;padding:9px 13px;border-radius:12px;font-size:14px;line-height:1.45;word-wrap:break-word}
.msg.me{align-self:flex-end;background:var(--grad);color:#fff}
.msg.them{align-self:flex-start;background:var(--surface-2);color:var(--txt);border:1px solid var(--line)}
.chat-form{display:flex;gap:8px;padding:14px;border-top:1px solid var(--line)}
.chat-form input{flex:1;background:var(--surface);border:1px solid var(--line);border-radius:10px;color:#fff;padding:11px 13px;font-size:14px;outline:none}
.chat-form input:focus{border-color:var(--accent)}
.chat-form input::placeholder{color:var(--muted-2)}
.chat-form button{background:var(--grad);border:none;border-radius:10px;color:#fff;padding:0 16px;cursor:pointer;font-size:16px}
.hidden{display:none !important}