.si{--si-sky-h:330px;--si-night:#0a2b29;--si-night-2:#0f3b39;position:relative;isolation:isolate;display:flex;flex-direction:column;min-block-size:100svh;overflow-x:clip;background:var(--background);color:var(--text)}.si:after,.si:before{content:"";position:absolute;inset-inline:0;inset-block-start:0;block-size:var(--si-sky-h);z-index:-1;pointer-events:none}.si:before{border-block-end:4px solid var(--coral);background:var(--si-night)}.si:after{background-image:linear-gradient(#ffffff0d 1px,transparent 0),linear-gradient(90deg,#ffffff0d 1px,transparent 0);background-size:40px 40px;mask-image:radial-gradient(80% 70% at 50% 20%,#000 15%,transparent 75%);-webkit-mask-image:radial-gradient(80% 70% at 50% 20%,#000 15%,transparent 75%)}[data-theme=dark] .si:before{background:var(--si-night-2)}.si-top{display:flex;justify-content:space-between;gap:var(--space-3);padding-block:max(12px,env(safe-area-inset-top)) 4px;padding-inline:var(--gutter);color:#ffffff}.si-brand,.si-top{align-items:center}.si-brand{display:inline-flex;min-block-size:var(--touch);color:inherit;text-decoration:none}.si-logo-ground,.si-stack-ground{display:none}.si-tools{display:flex;align-items:center;gap:var(--space-1)}.si-tool{display:inline-flex;align-items:center;justify-content:center;min-block-size:var(--touch);min-inline-size:var(--touch);padding-inline:var(--space-3);border-radius:var(--radius-pill);color:inherit;font-weight:var(--weight-semibold);text-decoration:none}.si .si-tool.stak-button{border:0;background:transparent;box-shadow:none;color:inherit}.si-tool:hover{background:#ffffff1f}.si-tool:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.si-tools .stak-lang{--lang-button-hover:#ffffff1f}.si-tools .stak-lang-button{min-block-size:var(--touch);padding-inline:var(--space-3)}.si-tools .stak-lang-button:focus-visible{outline-color:var(--accent)}.si-theme-sun{display:none}[data-theme=dark] .si-theme-sun{display:block}[data-theme=dark] .si-theme-moon{display:none}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .si-theme-sun{display:block}:root:not([data-theme=light]) .si-theme-moon{display:none}}.si .demo-banner{margin-inline:var(--gutter)}.si-main{flex:1;display:grid;grid-template-columns:minmax(0,1fr);padding-inline:var(--gutter);padding-block-end:max(24px,env(safe-area-inset-bottom))}.si-panel{display:grid;align-content:start;gap:var(--space-4);inline-size:100%;max-inline-size:560px;margin-inline:auto;min-inline-size:0}.si-showcase{display:none}.si-hero{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:var(--space-3);min-block-size:168px;padding-block:var(--space-2) 0}.si-figure{position:relative;display:grid;justify-items:center;align-content:end;inline-size:112px;block-size:160px}.si-staki{position:relative;z-index:1;animation:si-hover-in .62s var(--ease-spring) backwards .52s}.si-hero[data-mascot] .si-figure{block-size:auto;align-content:start}.si-stack{display:grid;justify-items:center;inline-size:104px}.si-hero:not([data-mascot]) .si-figure{align-content:center}.si-hero:not([data-mascot]) .si-stack .stak-logo-img{block-size:84px;inline-size:auto}.si-stack-mark{animation:si-drop .7s var(--ease-spring) backwards .24s}@keyframes si-drop{0%{opacity:0;transform:translateY(-34px) scaleX(.7)}}@keyframes si-hover-in{0%{opacity:0;transform:translateY(26px) scale(.6)}}.si-bubble{position:relative;justify-self:start;max-inline-size:320px;padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);border-end-start-radius:6px;background:var(--surface);color:var(--text);box-shadow:var(--shadow-float);transform-origin:0 100%;animation:si-bubble .46s var(--ease-spring) backwards .76s}[dir=rtl] .si-bubble{transform-origin:100% 100%}.si-bubble-title{margin:0;font-family:var(--font-display);font-size:var(--text-xl);font-weight:var(--weight-heavy);line-height:1.25}.si-bubble-body{margin:2px 0 0;color:var(--muted);font-size:var(--text-md);line-height:1.5}@keyframes si-bubble{0%{opacity:0;transform:scale(.7) translateY(10px)}}.si-hero[data-step=code] .si-bubble{animation-delay:60ms}.si-hero[data-step=code] .si-stack-mark,.si-hero[data-step=code] .si-staki,.si-hero[data-step=code]~.si-card{animation:none}.si-card{display:grid;gap:var(--space-4);padding:clamp(20px,4vw,32px);border:var(--border-width) solid var(--line);border-radius:var(--radius-sheet);background:var(--surface);box-shadow:var(--shadow-2);animation:stak-rise-in var(--motion-slow) var(--ease-out) backwards .12s}.si-card h1{margin:0;font-family:var(--font-display);font-size:clamp(28px,2.4vw + 18px,38px);font-weight:var(--weight-heavy);line-height:1.15;text-wrap:balance}.si-intro{margin:calc(var(--space-2) * -1) 0 0;color:var(--muted);font-size:var(--text-lg);line-height:1.6}.si-form{display:grid;gap:var(--space-4)}.si-form>*{animation:stak-rise-in var(--motion-slow) var(--ease-out) backwards}.si-form>:nth-child(2){animation-delay:60ms}.si-form>:nth-child(3){animation-delay:.12s}.si-form>:nth-child(4){animation-delay:.18s}.si-field{display:grid;gap:var(--space-2)}.si-label{font-weight:var(--weight-semibold);font-size:var(--text-md)}.si-skeleton{block-size:64px;border-radius:var(--radius-md)}.si-phone.stak-phone{direction:ltr;align-items:stretch;gap:0;min-block-size:64px;border:var(--border-width) solid var(--input-border);border-radius:var(--radius-md);background:var(--input-fill);transition:border-color var(--motion-fast) var(--ease-out),box-shadow var(--motion-fast) var(--ease-out)}.si-phone.stak-phone:focus-within{border-color:var(--primary);box-shadow:var(--ring)}.si-phone .stak-phone-number{min-block-size:60px;border:0;border-radius:0 var(--radius-md) var(--radius-md) 0;background:transparent;box-shadow:none;font-family:var(--font-display);font-size:22px;font-weight:var(--weight-bold);letter-spacing:.02em;text-align:start}.si-phone .stak-phone-number:focus,.si-phone .stak-phone-number:focus-visible{outline:none;box-shadow:none}.si-phone .stak-phone-number::placeholder{color:var(--subtle);font-weight:var(--weight-medium)}.si-country{display:inline-flex;align-items:center;gap:6px;flex:none;min-block-size:60px;padding-inline:14px 10px;border:0;border-inline-end:var(--border-width) solid var(--line);border-radius:var(--radius-md) 0 0 var(--radius-md);background:transparent;color:var(--text);font-family:var(--font-display);font-size:var(--text-lg);font-weight:var(--weight-bold);cursor:pointer;transition:background var(--motion-fast) var(--ease-out)}.si-phone[data-country-after] .si-country{order:-1}.si-country:hover{background:var(--surface-alt)}.si-country:active{transform:scale(.97)}.si-country:focus-visible{outline:3px solid var(--focus);outline-offset:2px}.si-flag{display:inline-grid;place-items:center;min-inline-size:28px;font-size:24px;line-height:1;font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",var(--font-body)}.si-channel,.si-country-caret{color:var(--muted)}.si-channel{display:flex;align-items:flex-start;gap:var(--space-2);margin:0;font-size:var(--text-sm);line-height:1.55}.si-channel b{color:var(--text);font-weight:var(--weight-semibold)}.si-channel svg{flex:none;margin-block-start:1px;color:var(--primary-text)}.si-channel .si-whatsapp{color:var(--success-fill)}.si-submit.stak-button{min-block-size:60px;font-size:var(--text-xl)}.si-or{display:flex;align-items:center;gap:var(--space-3);margin:0;color:var(--subtle);font-size:var(--text-sm)}.si-or:after,.si-or:before{content:"";flex:1;block-size:2px;border-radius:2px;background:var(--line)}.si-passkey.stak-button,.si-social.stak-button{min-block-size:56px}.si-returning{display:grid;gap:var(--space-4)}.si-error{padding:var(--space-3) var(--space-4);border-radius:var(--radius-sm);background:var(--danger-bg);color:var(--danger);line-height:1.55;animation:stak-pop var(--motion-sheet) var(--ease-spring) backwards}.si-error,.si-note{margin:0;font-weight:var(--weight-medium)}.si-note{color:var(--success)}.si-hint{font-size:var(--text-sm);text-align:center}.si-hint,.si-local{margin:0;color:var(--muted)}.si-local{display:flex;align-items:flex-start;gap:var(--space-2);padding:var(--space-3);border-radius:var(--radius-sm);background:var(--surface-alt);font-size:var(--text-xs);line-height:1.6}.si-local svg{flex:none;color:var(--primary-text)}.si-demo{display:flex;align-items:center;justify-content:center;gap:var(--space-2);min-block-size:var(--touch);color:var(--muted);font-size:var(--text-sm);text-decoration:none}.si-demo:hover{color:var(--primary-text)}.si-phone-shown{color:var(--text);font-weight:var(--weight-semibold);white-space:nowrap}.si-link{display:inline-flex;align-items:center;gap:4px;min-block-size:32px;padding:0;border:0;background:none;color:var(--primary-text);font:inherit;font-weight:var(--weight-semibold);cursor:pointer;text-decoration:underline;text-underline-offset:4px}.si-link:disabled{opacity:.5}.si-resend{display:flex;justify-content:center;margin:0;min-block-size:var(--touch);align-items:center;color:var(--muted);font-size:var(--text-sm);font-variant-numeric:tabular-nums}.si-otp{position:relative;inline-size:100%;max-inline-size:420px;margin-inline:auto}.si-otp-input{position:absolute;inset:0;z-index:1;inline-size:100%;block-size:100%;margin:0;padding:0;border:0;background:transparent;color:transparent;caret-color:transparent;font-size:16px;letter-spacing:3em;outline:none;cursor:text;-webkit-text-fill-color:transparent}.si-otp-input::selection{background:transparent}.si-otp-boxes{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:clamp(6px,1.6vw,10px)}.si-otp-boxes[data-shake]{animation:si-shake .42s var(--ease-out) backwards}.si-otp-box{position:relative;display:grid;place-items:center;aspect-ratio:5/6;max-block-size:76px;border:var(--border-width) solid var(--input-border);border-radius:var(--radius-sm);background:var(--input-fill);font-family:var(--font-display);font-size:clamp(26px,5vw,34px);font-weight:var(--weight-heavy);font-variant-numeric:tabular-nums;transition:border-color var(--motion-fast) var(--ease-out),background var(--motion-fast) var(--ease-out),transform var(--motion-fast) var(--ease-out),box-shadow var(--motion-fast) var(--ease-out)}.si-otp-box[data-filled]{border-color:color-mix(in srgb,var(--primary) 45%,var(--line));background:var(--surface)}.si-otp-box[data-active]{border-color:var(--primary);box-shadow:var(--ring);transform:translateY(-2px)}.si-otp-digit{animation:si-digit .26s var(--ease-spring) backwards}@keyframes si-digit{0%{opacity:0;transform:translateY(10px) scale(.6)}}.si-otp-caret{inline-size:2px;block-size:40%;border-radius:2px;background:var(--primary);animation:si-caret 1s steps(1) infinite}@keyframes si-caret{50%{opacity:0}}.si-otp[data-state=checking] .si-otp-box{animation:stak-pulse .9s var(--ease-in-out) infinite;animation-delay:calc(var(--i) * 70ms)}.si-otp[data-state=error] .si-otp-box{border-color:var(--danger-fill)}.si-otp[data-state=done] .si-otp-box{border-color:var(--success-fill);background:var(--success-fill);color:#ffffff;animation:si-done .42s var(--ease-spring) backwards;animation-delay:calc(var(--i) * 45ms)}@keyframes si-done{40%{transform:translateY(-8px) scale(1.06)}}@keyframes si-shake{15%,55%{transform:translateX(-8px)}35%,75%{transform:translateX(8px)}}.si-trust{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-2) var(--space-4);margin:0;padding:0;list-style:none;color:var(--muted);font-size:var(--text-sm)}.si-trust li{display:inline-flex;align-items:center;gap:6px}.si-trust svg{color:var(--success-fill)}.si-country-sheet.stak-dialog{display:grid;grid-template-rows:auto auto minmax(0,1fr);gap:var(--space-3);overflow:hidden}.si-country-search{position:relative;display:block}.si-country-search svg{position:absolute;inset-block-start:50%;inset-inline-start:14px;translate:0 -50%;color:var(--muted);pointer-events:none}.si-country-search .stak-input{inline-size:100%;min-block-size:52px;padding-inline-start:44px;font-size:16px}.si-country-groups{display:grid;align-content:start;gap:var(--space-4);min-block-size:0;overflow-y:auto;overscroll-behavior:contain;margin-inline:calc(var(--space-2) * -1);padding-inline:var(--space-2);padding-block-end:var(--space-4)}.si-country-groups h3{margin:0 0 var(--space-2);color:var(--muted);font-size:var(--text-xs);font-weight:var(--weight-semibold);letter-spacing:.04em;text-transform:uppercase}.si-country-list{display:grid;gap:2px;margin:0;padding:0;list-style:none}.si-country-row{display:grid;grid-template-columns:36px minmax(0,1fr) auto 20px;align-items:center;gap:var(--space-3);inline-size:100%;min-block-size:52px;padding-inline:var(--space-3);border:0;border-radius:var(--radius-sm);background:transparent;color:var(--text);font:inherit;text-align:start;cursor:pointer}.si-country-row:hover{background:var(--surface-alt)}.si-country-row:focus-visible{outline:3px solid var(--focus);outline-offset:-3px}.si-country-row[aria-pressed=true]{background:var(--primary-soft);font-weight:var(--weight-semibold)}.si-country-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.si-country-dial{color:var(--muted);font-variant-numeric:tabular-nums}.si-country-check{color:var(--primary-text)}.si-country-none{margin:var(--space-4) 0;color:var(--muted);text-align:center}@media (max-width:420px){.si-hero[data-joining]{grid-template-columns:minmax(0,1fr);min-block-size:0}.si-hero[data-joining] .si-figure{display:none}.si{--si-sky-h:300px}.si-hero{min-block-size:150px;gap:var(--space-2)}.si-figure{inline-size:92px;block-size:142px}.si-hero[data-mascot] .si-figure{block-size:auto}.si-staki{inline-size:80px!important;block-size:88px!important}.si-stack{inline-size:86px}.si-stack .stak-logo-img{block-size:52px;inline-size:auto}.si-bubble-title{font-size:var(--text-lg)}.si-bubble-body{font-size:var(--text-sm)}.si-card{padding:20px}.si-phone .stak-phone-number{font-size:20px}}@media (min-width:700px) and (orientation:portrait){.si{--si-sky-h:420px}.si-panel{padding-block-start:var(--space-5);gap:var(--space-5)}.si-hero{min-block-size:210px;gap:var(--space-5)}.si-figure{inline-size:140px;block-size:200px}.si-staki{inline-size:116px!important;block-size:128px!important}.si-stack{inline-size:128px}.si-stack .stak-logo-img{block-size:76px;inline-size:auto}.si-bubble{max-inline-size:380px;padding:var(--space-4) var(--space-5)}.si-bubble-title{font-size:var(--text-2xl)}.si-bubble-body{font-size:var(--text-lg)}.si-card{padding:36px}}@media (min-width:1000px) and (orientation:landscape){.si:after,.si:before{display:none}.si-top{color:var(--text)}.si-tool:hover{background:var(--surface-alt)}.si-tools .stak-lang{--lang-button-hover:var(--surface-alt)}.si-tools .stak-lang-button:focus-visible{outline-color:var(--focus)}.si-brand{color:var(--text)}.si-logo-sky,.si-stack-sky{display:none}.si-logo-ground,.si-stack-ground{display:inline-flex}.si-main{grid-template-columns:minmax(400px,.92fr) minmax(0,1.08fr);gap:clamp(16px,2.4vw,40px);padding-inline:clamp(16px,2.4vw,32px) 16px;padding-block-end:16px}[dir=rtl] .si-main{padding-inline:16px clamp(16px,2.4vw,32px)}.si-panel{align-content:center;max-inline-size:500px;padding-block:var(--space-2) var(--space-4)}.si-hero{min-block-size:0}.si-figure{inline-size:96px;block-size:140px}.si-staki{inline-size:84px!important;block-size:92px!important}.si-stack{inline-size:90px}.si-stack .stak-logo-img{block-size:60px;inline-size:auto}.si-bubble{border:var(--border-width) solid var(--line)}.si-card{padding:28px}.si-card h1{font-size:clamp(28px,1.4vw + 16px,36px)}.si-showcase{position:relative;display:block;min-block-size:calc(100svh - 76px);overflow:hidden;border-radius:var(--radius-md);background:var(--si-night)}[data-theme=dark] .si-showcase{border:1px solid #ffffff14}}.si-card.security-verify>h1{display:flex;align-items:center;gap:var(--space-3)}.si-card.security-verify>h1>svg{flex:none;color:var(--primary-text)}.si-help{justify-content:center;min-block-size:var(--touch);inline-size:100%;font-size:var(--text-sm);text-align:center;text-wrap:balance}.si-email{inline-size:100%;min-block-size:56px;font-size:var(--text-lg)}.rc-card{display:grid;gap:var(--space-2);padding:var(--space-4);border:1px solid var(--border);border-radius:var(--radius-card);background:var(--surface)}.rc-card h2{display:flex;align-items:center;gap:var(--space-2);margin:0;font-size:var(--text-lg)}.rc-card p{margin:0;color:var(--muted);font-size:var(--text-sm)}.rc-sessions{display:grid;gap:var(--space-2);margin:0;padding:0;list-style:none}.rc-sessions li{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3)}.rc-sessions small{display:block;color:var(--muted)}.rc-current{margin-inline-start:var(--space-2);color:var(--success-fill);font-size:var(--text-xs);font-style:normal}.si-passkey-link{display:inline-flex;align-items:center;gap:6px}.si-plan-note{margin-block:8px 0;padding:8px 12px;border-inline-start:3px solid var(--primary);background:var(--surface-alt);border-radius:var(--radius-md);line-height:1.6}