.bt-signin{min-height:100dvh;background:var(--bg)}@media (width >= 64rem){.bt-signin{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}}.bt-signin-pane{display:flex;min-height:100dvh;flex-direction:column;justify-content:center;padding:40px 16px}@media (width >= 40rem){.bt-signin-pane{padding:48px 24px}}@media (width >= 64rem){.bt-signin-pane{min-height:0;padding:48px 40px}}.bt-signin-card{width:100%;max-width:26rem;margin-inline:auto;padding:28px 22px;background:var(--surface);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow-2)}@media (width >= 40rem){.bt-signin-card{padding:32px 28px}}.bt-signin-title{font-size:var(--text-xl);font-weight:700;letter-spacing:-.01em}.bt-signin-sub{margin-top:2px;color:var(--text-2)}.bt-signin-notice{margin-top:16px;border-radius:7px;border:1px solid var(--border);background:var(--surface-2);color:var(--text-2)}.bt-signin-error,.bt-signin-notice{display:flex;align-items:flex-start;gap:8px;padding:8px 10px}.bt-signin-error{border-radius:7px;border:1px solid var(--danger-ink);background:var(--danger-soft);color:var(--danger-ink)}.bt-signin-error svg,.bt-signin-notice svg{margin-top:2px;flex-shrink:0}.bt-signin-form{display:flex;flex-direction:column;gap:16px;margin-top:24px}.bt-signin-note{margin-top:28px;padding-top:16px;border-top:1px solid var(--border);font-size:var(--text-sm);color:var(--text-3)}.bt-signin .bt-signin-input{height:48px;border-radius:7px;border:1px solid var(--text-3);background:var(--surface-3);font-size:.9375rem;color:var(--text);transition:background-color var(--dur-fast) var(--e-out),border-color var(--dur-fast) var(--e-out),box-shadow var(--dur-fast) var(--e-out)}.bt-signin .bt-signin-input>input,.bt-signin input.bt-signin-input{padding-inline:12px;color:var(--text)}.bt-signin .bt-signin-input::placeholder,.bt-signin .bt-signin-input>input::placeholder{color:var(--text-3)}.bt-signin .bt-signin-input:hover{border-color:var(--text-2);background:var(--surface-2)}.bt-signin .bt-signin-input:focus-within{border-color:var(--focus);background:var(--surface)}.bt-signin .bt-signin-input>input:focus-visible{outline:none;box-shadow:none}.bt-signin input:-webkit-autofill,.bt-signin input:-webkit-autofill:focus,.bt-signin input:-webkit-autofill:hover{-webkit-text-fill-color:var(--text);-webkit-box-shadow:inset 0 0 0 100px var(--surface-3);caret-color:var(--text)}.bt-signin .bt-signin-field>label{margin-bottom:6px;font-size:var(--text-base);font-weight:600;color:var(--text)}.bt-signin-reveal{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;margin-right:3px;border-radius:6px;color:var(--text-2);transition:background-color var(--dur-fast) var(--e-out),color var(--dur-fast) var(--e-out)}.bt-signin-reveal:hover{background:var(--surface);color:var(--text)}.bt-signin-submit{height:48px;font-size:.875rem;font-weight:600;transition:background-color var(--dur-fast) var(--e-out),border-color var(--dur-fast) var(--e-out),box-shadow var(--dur-fast) var(--e-out),translate var(--dur-fast) var(--e-out)}.bt-signin-submit:hover:not(:disabled){box-shadow:var(--shadow-2);translate:0 -1px}.bt-signin-submit:active:not(:disabled){translate:0 0;box-shadow:none}.bt-signin-art{display:none}@media (width >= 64rem){.bt-signin-art{position:relative;display:flex;flex-direction:column;justify-content:space-between;gap:32px;overflow:hidden;padding:clamp(32px,4vw,56px);background:var(--surface-invert);color:var(--invert-text);isolation:isolate}}.bt-signin-art .eyebrow{color:var(--invert-text-2)}.bt-signin-art:before{content:"";position:absolute;inset:-10%;z-index:-2;background-image:radial-gradient(currentColor 1px,transparent 1.6px),radial-gradient(currentColor 1px,transparent 1.6px);background-size:28px 28px,28px 28px;background-position:0 0,14px 14px;opacity:.07}.bt-signin-art:after{content:"";position:absolute;z-index:-1;width:62%;aspect-ratio:1;top:-12%;right:-14%;border-radius:50%;background:radial-gradient(circle,color-mix(in oklab,var(--accent) 40%,transparent) 0,transparent 68%);opacity:.5;filter:blur(10px)}.bt-signin-art-body{display:flex;min-height:0;flex-direction:column;gap:clamp(20px,3.5vh,32px)}.bt-signin-headline{max-width:18ch;font-size:clamp(1.5rem,2.4vw,2rem);font-weight:600;line-height:1.15;letter-spacing:-.02em}.bt-signin-lede{max-width:46ch;color:var(--invert-text-2);line-height:1.6}.bt-signin-flow{gap:12px}.bt-signin-flow,.bt-signin-rail{display:flex;flex-direction:column}.bt-signin-rail{position:relative;gap:2px;padding-left:20px}.bt-signin-rail:before{content:"";position:absolute;left:3px;top:12px;bottom:12px;width:1px;background:linear-gradient(to bottom,color-mix(in oklab,var(--accent) 70%,transparent),var(--invert-border));transform-origin:top}.bt-signin-step{position:relative;display:flex;align-items:center;min-height:24px;font-size:var(--text-sm);color:var(--invert-text-2)}.bt-signin-node{position:absolute;left:-20px;width:7px;height:7px;border-radius:2px;rotate:45deg;background:var(--invert-text-2);opacity:.55}.bt-signin-step:first-child{color:var(--invert-text);font-weight:600}.bt-signin-step:first-child .bt-signin-node{background:var(--accent);opacity:1}.bt-signin-step:last-child{color:var(--invert-text);font-weight:600}.bt-signin-step:last-child .bt-signin-node{background:var(--success);opacity:1}.bt-signin-foot{font-size:var(--text-xs);color:var(--invert-text-2)}@media (height < 40rem){.bt-signin-flow{display:none}}.bt-signin-enter{animation:bt-signin-rise var(--dur-slow) var(--e-out) both;animation-delay:calc(var(--bt-step, 0) * 45ms)}@keyframes bt-signin-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.bt-signin-art .bt-signin-enter{animation-name:bt-signin-fade-in}@keyframes bt-signin-fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.bt-signin-step{animation:bt-signin-fade-in var(--dur-base) var(--e-out) both}.bt-signin-step:first-child{animation-delay:.16s}.bt-signin-step:nth-child(2){animation-delay:185ms}.bt-signin-step:nth-child(3){animation-delay:.21s}.bt-signin-step:nth-child(4){animation-delay:235ms}.bt-signin-step:nth-child(5){animation-delay:.26s}.bt-signin-step:nth-child(6){animation-delay:285ms}.bt-signin-step:nth-child(7){animation-delay:.31s}.bt-signin-step:nth-child(8){animation-delay:335ms}.bt-signin-rail:before{animation:bt-signin-draw var(--dur-slow) var(--e-move) .14s both}@keyframes bt-signin-draw{0%{transform:scaleY(0)}to{transform:none}}@media (prefers-reduced-motion:reduce){.bt-signin-enter,.bt-signin-rail:before,.bt-signin-step{animation:none!important;transform:none!important}.bt-signin-submit:hover:not(:disabled){translate:0 0}}