:root{
  --text:#f2f3f7;
  --text-dim:#9aa0ab;
  --accent:#3ddc84;         /* call green */
  --accent-2:#2fb8ff;       /* cool cyan */
  --blue:#4aa3ff;
  --red:#ff4d43;
  --glass:rgba(255,255,255,.07);
  --glass-strong:rgba(255,255,255,.12);
  --edge:rgba(255,255,255,.16);
  --spring:cubic-bezier(.34,1.56,.64,1);
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:#05070a;color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI",system-ui,sans-serif;
  overflow:hidden;overscroll-behavior:none;letter-spacing:-.01em}

/* ---------- living background ---------- */
#bg{position:fixed;inset:0;z-index:-2;overflow:hidden;background:
  radial-gradient(120% 120% at 50% -10%,#0e1622 0%,#05070a 55%)}
.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55;mix-blend-mode:screen}
.b1{width:60vh;height:60vh;background:#2f7dff;left:-15vh;top:-10vh;animation:drift1 18s ease-in-out infinite}
.b2{width:55vh;height:55vh;background:#00d4a0;right:-18vh;top:18vh;animation:drift2 22s ease-in-out infinite}
.b3{width:50vh;height:50vh;background:#7a4dff;left:20vh;bottom:-20vh;animation:drift3 20s ease-in-out infinite}
.grain{position:absolute;inset:0;opacity:.05;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
@keyframes drift1{50%{transform:translate(18vh,12vh) scale(1.15)}}
@keyframes drift2{50%{transform:translate(-14vh,10vh) scale(1.1)}}
@keyframes drift3{50%{transform:translate(10vh,-12vh) scale(1.2)}}

/* ---------- liquid-glass material ---------- */
.glass{background:var(--glass);
  backdrop-filter:blur(30px) saturate(180%);-webkit-backdrop-filter:blur(30px) saturate(180%);
  border:1px solid var(--edge);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.22), inset 0 -1px 0 rgba(0,0,0,.25), 0 12px 40px rgba(0,0,0,.4)}

/* ---------- screens & transitions ---------- */
.screen{position:fixed;inset:0;display:none;flex-direction:column;
  padding-top:var(--safe-top);padding-bottom:var(--safe-bottom)}
.screen.active{display:flex;animation:screen-in .45s var(--spring)}
@keyframes screen-in{from{opacity:0;transform:scale(1.03)}to{opacity:1;transform:none}}

/* ---------- home ---------- */
.home-top{display:flex;align-items:center;justify-content:space-between;padding:14px 20px}
.wordmark{font-size:19px;font-weight:600;letter-spacing:-.02em;color:var(--text)}
.wordmark b{font-weight:600;background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.icon-btn{background:var(--glass);border:1px solid var(--edge);border-radius:50%;
  width:40px;height:40px;display:grid;place-items:center;color:var(--text-dim);cursor:pointer;
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:transform .2s var(--spring)}
.icon-btn:active{transform:scale(.9);color:#fff}

.home-body{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.hero{position:relative;width:180px;height:180px;display:grid;place-items:center;margin-bottom:8px}
.hero-ring{position:absolute;inset:0;border-radius:50%;
  background:conic-gradient(from 0deg,var(--accent),var(--accent-2),#7a4dff,var(--accent));
  filter:blur(14px);opacity:.6;animation:spin 8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.avatar-badge{position:relative;width:132px;height:132px;border-radius:50%;
  background:linear-gradient(160deg,#3a4a5c,#1b232e);display:grid;place-items:center;
  font-size:52px;font-weight:600;color:#fff;
  box-shadow:inset 0 2px 6px rgba(255,255,255,.18),0 16px 50px rgba(0,0,0,.55);
  border:1px solid rgba(255,255,255,.14)}
.home-body h1{font-size:36px;font-weight:600;margin:20px 0 0;letter-spacing:-.03em}
.subtitle{display:flex;align-items:center;gap:7px;color:var(--text-dim);margin:6px 0 0;font-size:15px}
.dot-live{width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 0 rgba(61,220,132,.6);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 8px rgba(61,220,132,0)}}

.home-cta{padding:0 24px calc(24px + var(--safe-bottom));display:flex;flex-direction:column;align-items:center;gap:14px}
.facetime-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;width:100%;max-width:340px;
  background:linear-gradient(180deg,#46e58c,#26b869);color:#04140b;border:0;border-radius:20px;
  padding:18px;font-size:18px;font-weight:600;cursor:pointer;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 10px 34px rgba(38,184,105,.45);
  transition:transform .18s var(--spring),filter .18s}
.facetime-btn:active{transform:scale(.97);filter:brightness(1.05)}
.hint{color:var(--text-dim);font-size:13px}

/* ---------- nav bar ---------- */
.nav-bar{display:flex;align-items:center;justify-content:space-between;
  padding:12px 14px;margin:0;border-radius:0 0 0 0;position:relative;z-index:2;
  border-left:0;border-right:0;border-top:0}
.nav-bar h2{font-size:17px;font-weight:600;margin:0}
.nav-back{background:none;border:0;color:var(--blue);cursor:pointer;padding:6px;display:grid;place-items:center}
.nav-back:active{opacity:.6}
.nav-spacer{width:34px}

/* ---------- settings ---------- */
.settings-body{overflow-y:auto;padding:6px 16px 40px;-webkit-overflow-scrolling:touch}
.group-label{color:var(--text-dim);font-size:13px;margin:24px 8px 9px;font-weight:500;letter-spacing:-.01em}
.card{border-radius:18px;overflow:hidden}
.card + .card{margin-top:10px}
.row{display:flex;align-items:center;gap:14px;padding:16px}
.row.column{flex-direction:column;align-items:stretch;gap:14px}
.row-head{display:flex;justify-content:space-between;align-items:center}
.row-title{font-size:17px;font-weight:500}
.row-icon{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none;color:#fff}
.row-icon.vision{background:linear-gradient(160deg,#2fb8ff,#2f7dff)}
.row-text{flex:1}
.row-desc{color:var(--text-dim);font-size:13px;line-height:1.45;margin:6px 0 0}
.pill{background:rgba(61,220,132,.16);color:var(--accent);font-size:14px;font-weight:600;
  padding:5px 12px;border-radius:20px;border:1px solid rgba(61,220,132,.25)}
.pill.ok{background:rgba(61,220,132,.22)} .pill.bad{background:rgba(255,107,107,.18);color:#ff6b6b;border-color:rgba(255,107,107,.3)}
#t4url{background:rgba(255,255,255,.06);border:1px solid var(--edge);border-radius:11px;color:var(--text);
  font-size:15px;padding:12px 13px;outline:none;width:100%}
#t4url::placeholder{color:var(--text-dim)}
.ft-connect{background:linear-gradient(180deg,#46e58c,#26b869);color:#04140b;border:0;border-radius:12px;
  padding:13px;font-size:16px;font-weight:600;cursor:pointer;box-shadow:inset 0 1px 0 rgba(255,255,255,.4)}
.ft-connect:active{filter:brightness(1.05)}
.scale{display:flex;justify-content:space-between;color:var(--text-dim);font-size:11px;margin-top:-4px}
.footer-note{text-align:center;color:var(--text-dim);font-size:12px;margin-top:34px}

/* range slider */
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:28px;height:28px;border-radius:50%;
  background:#fff;box-shadow:0 3px 10px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.6);cursor:pointer}

/* iOS switch */
.switch{position:relative;display:inline-block;width:52px;height:32px;flex:none}
.switch input{opacity:0;width:0;height:0}
.slider-track{position:absolute;inset:0;background:rgba(120,120,128,.32);border-radius:32px;transition:.3s var(--spring)}
.slider-track::before{content:"";position:absolute;width:28px;height:28px;left:2px;top:2px;background:#fff;
  border-radius:50%;transition:.3s var(--spring);box-shadow:0 2px 6px rgba(0,0,0,.4)}
.switch input:checked + .slider-track{background:linear-gradient(180deg,#46e58c,#26b869)}
.switch input:checked + .slider-track::before{transform:translateX(20px)}

/* ---------- call ---------- */
#call{background:#0b0f14}
.avatar-stage{position:absolute;inset:0;width:100%;height:100%;
  background:radial-gradient(130% 100% at 50% 32%,#2a3f57,#0b0f14)}
.call-vignette{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,.45),transparent 22%,transparent 68%,rgba(0,0,0,.55))}
.call-top{position:absolute;top:calc(var(--safe-top) + 16px);left:0;right:0;text-align:center;z-index:3}
.call-name{font-size:18px;font-weight:600;text-shadow:0 1px 10px rgba(0,0,0,.6)}
.call-status{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:#e5e5ea;margin-top:3px}
.status-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 2s infinite}

.self-view{position:absolute;top:calc(var(--safe-top) + 66px);right:16px;width:100px;height:140px;
  border-radius:18px;object-fit:cover;transform:scaleX(-1);z-index:5;
  box-shadow:0 8px 26px rgba(0,0,0,.55);border:1px solid rgba(255,255,255,.18)}

.call-controls{position:absolute;left:50%;transform:translateX(-50%);bottom:calc(var(--safe-bottom) + 26px);
  display:flex;gap:16px;padding:12px 16px;border-radius:44px;z-index:4}
.ctrl{width:58px;height:58px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(255,255,255,.14);color:#fff;display:grid;place-items:center;
  transition:transform .18s var(--spring),background .2s}
.ctrl:active{transform:scale(.88)}
.ctrl.active-on{background:#fff;color:#111}
.ctrl.end{background:linear-gradient(180deg,#ff5b52,#e0342b);box-shadow:0 8px 22px rgba(224,52,43,.5)}

/* ---------- permission sheet ---------- */
.sheet-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:flex-end;z-index:50}
.sheet-backdrop.show{display:flex;animation:fade .25s ease}
.sheet{width:100%;border-radius:28px 28px 0 0;padding:14px 24px;text-align:center;
  padding-bottom:calc(26px + var(--safe-bottom));animation:rise .5s var(--spring)}
.grabber{display:block;width:38px;height:5px;border-radius:3px;background:rgba(255,255,255,.3);margin:0 auto 18px}
.sheet-icon{width:64px;height:64px;border-radius:18px;margin:0 auto 16px;color:#fff;
  background:linear-gradient(160deg,#3ddc84,#26b869);display:grid;place-items:center;
  box-shadow:0 10px 30px rgba(38,184,105,.45)}
.sheet h3{font-size:22px;font-weight:600;margin:0 0 12px;letter-spacing:-.02em}
.sheet p{color:#d1d1d6;font-size:15px;line-height:1.5;margin:0 0 10px}
.sheet-fineprint{color:var(--text-dim);font-size:13px}
.sheet-actions{display:flex;flex-direction:column;gap:10px;margin-top:20px}
.btn-primary{background:linear-gradient(180deg,#46e58c,#26b869);color:#04140b;border:0;border-radius:16px;
  padding:16px;font-size:17px;font-weight:600;cursor:pointer;box-shadow:inset 0 1px 0 rgba(255,255,255,.4)}
.btn-primary:active{filter:brightness(1.05)}
.btn-ghost{background:none;color:var(--blue);border:0;padding:12px;font-size:17px;font-weight:500;cursor:pointer}

.hidden{display:none!important}
@keyframes rise{from{transform:translateY(100%)}to{transform:translateY(0)}}
@keyframes fade{from{opacity:0}to{opacity:1}}

@media (prefers-reduced-motion:reduce){*{animation:none!important}}