.auth-shell{min-height:100vh;min-height:100dvh;display:grid;place-items:center;background:radial-gradient(circle at 50% 42%,rgba(31,78,121,.26),transparent 280px),#0b2237;color:#fff;padding:24px}
.login-box{width:min(100%,440px);display:flex;flex-direction:column;align-items:center;text-align:center}
.login-logo{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(145deg,var(--accent),var(--accent-strong));color:#fff;box-shadow:0 22px 55px rgba(31,78,121,.35);margin-bottom:20px}
.login-logo svg{width:34px;height:34px}
.login-title{font-size:30px;line-height:1.05;margin:0;font-weight:850;letter-spacing:-.03em}
.login-sub{margin:7px 0 22px;color:rgba(255,255,255,.68);font-size:14px}
.login-card{width:100%;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:24px 20px;box-shadow:0 24px 70px rgba(0,0,0,.18);backdrop-filter:blur(10px)}
.login-txt{margin:0;color:rgba(255,255,255,.84);font-size:14px;line-height:1.65}
.login-note{margin:16px 0 0;color:rgba(255,255,255,.58);font-size:12.5px}
.auth-actions{display:grid;gap:10px;margin-top:18px}
.google-btn{width:100%;justify-content:center;min-height:46px;font-size:14px;background:#fff!important;color:#172033!important;border-color:#fff!important}
.google-g{width:19px;height:19px;display:inline-grid;place-items:center;border-radius:50%;background:#fff;color:#1f1f1f;font-weight:800}
.login-install{margin-top:18px;background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.33);color:#fff;min-height:42px;padding:10px 18px}
.login-install:hover{background:rgba(255,255,255,.14)}
.login-install svg{width:18px;height:18px}
.auth-error{margin:0 0 14px;padding:10px 12px;border-radius:10px;background:rgba(220,38,38,.16);color:#fecaca;font-size:13px;text-align:left}
.install-help-overlay{position:fixed;inset:0;z-index:200;background:rgba(5,12,22,.62);display:grid;place-items:center;padding:20px}
.install-help-card{width:min(100%,390px);position:relative;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--shadow-lg);text-align:left}
.install-help-card h2{margin:0 34px 6px 0;font-size:21px}
.install-help-card p{margin:0 0 14px;color:var(--ink-3);line-height:1.5}
.install-help-close{position:absolute;top:10px;right:10px}
.install-steps{margin:12px 0 18px;padding-left:20px;color:var(--ink-2)}
.install-steps li{margin:8px 0}
.install-muted{font-size:12.5px}
@media(max-width:860px){
  .auth-shell{align-items:center;padding:calc(24px + env(safe-area-inset-top)) 18px calc(24px + env(safe-area-inset-bottom))}
  .login-title{font-size:28px}
  .login-card{padding:22px 18px}
}
@media(max-width:860px) and (max-height:680px){
  .auth-shell{align-items:start;padding-top:calc(22px + env(safe-area-inset-top))}
}