:root{--kv4-bg:#0A0F17;--kv4-bg-2:#0F1620;--kv4-surface:#141B26;--kv4-surface-2:#1A2330;--kv4-elev:#1F2A39;--kv4-line:#2A3441;--kv4-line-soft:#1F2730;--kv4-line-strong:#3A4654;--kv4-fg:#F2F4F7;--kv4-muted:#B8C0CC;--kv4-dim:#7A8595;--kv4-em:oklch(72% 0.16 250);--kv4-em-deep:oklch(48% 0.19 252);--kv4-em-ink:oklch(99% 0.005 240);--kv4-em-tint:color-mix(in oklch,var(--kv4-em) 18%,transparent);--kv4-em-tint-2:color-mix(in oklch,var(--kv4-em) 10%,transparent);--kv4-em-glow:color-mix(in oklch,var(--kv4-em) 40%,transparent);--kv4-co:oklch(76% 0.15 38);--kv4-co-deep:oklch(58% 0.18 32);--kv4-co-glow:color-mix(in oklch,var(--kv4-co) 40%,transparent);--kv4-sans:var(--font-inter,"Inter"),-apple-system,BlinkMacSystemFont,system-ui,sans-serif;--kv4-mono:var(--font-geist-mono,"JetBrains Mono"),ui-monospace,Menlo,monospace;--kv4-display:var(--font-inter,"Inter"),-apple-system,BlinkMacSystemFont,system-ui,sans-serif;--kv4-display-feat:"tnum","cv11","ss03","ss01","cv05"}.kv4-login{min-height:100vh;display:grid;grid-template-columns:1.15fr 1fr;background:var(--kv4-bg);color:var(--kv4-fg);font-family:var(--kv4-sans)}.kv4-login-left{position:relative;overflow:hidden;display:flex;flex-direction:column;padding:44px 56px;background:radial-gradient(ellipse 70% 50% at 70% 80%,var(--kv4-em-tint),transparent 60%),radial-gradient(ellipse 60% 40% at 20% 10%,color-mix(in oklch,var(--kv4-em-deep) 35%,transparent),transparent 60%),linear-gradient(180deg,var(--kv4-bg-2),var(--kv4-bg))}.kv4-login-vault{position:absolute;inset:50% auto auto 50%;width:min(72vw,680px);height:min(72vw,680px);transform:translate(-50%,-50%);opacity:.32;pointer-events:none}.kv4-login-vault .kv4-ring{fill:none;stroke:var(--kv4-em);stroke-width:.8;opacity:.3}.kv4-login-vault .kv4-pulse-ring{animation:kv4-vault-pulse 3.5s ease-in-out infinite}.kv4-login-vault .kv4-core{fill:var(--kv4-em-tint);stroke:var(--kv4-em);stroke-width:1}.kv4-login-vault text{fill:var(--kv4-em);font-family:var(--kv4-mono);font-size:11px;letter-spacing:.2em}.kv4-login-vault line{stroke:var(--kv4-em);stroke-width:.5;stroke-dasharray:3 4;opacity:.3}.kv4-login-particles{position:absolute;z-index:0;inset:0;pointer-events:none;overflow:hidden;opacity:.88;background:radial-gradient(ellipse 42% 38% at 50% 46%,rgba(7,12,22,.88),transparent 70%),radial-gradient(ellipse 70% 80% at 18% 72%,color-mix(in oklch,var(--kv4-em) 10%,transparent),transparent 68%),radial-gradient(ellipse 66% 70% at 88% 28%,color-mix(in oklch,var(--kv4-co) 11%,transparent),transparent 70%);mask-image:radial-gradient(ellipse 86% 80% at 50% 50%,#000 0,#000 58%,transparent 96%)}.kv4-login-particles:after,.kv4-login-particles:before{content:"";position:absolute;inset:0;pointer-events:none}.kv4-login-particles:before{background:linear-gradient(115deg,transparent 0 42%,rgba(95,211,255,.035) 42.4% 42.8%,transparent 43.2%),linear-gradient(145deg,transparent 0 54%,rgba(126,105,255,.04) 54.3% 54.7%,transparent 55.2%);filter:blur(18px);animation:kv4-login-particle-glow 16s ease-in-out infinite}.kv4-login-particles:after{background:radial-gradient(ellipse 44% 46% at 52% 44%,rgba(7,12,22,.58),transparent 68%),linear-gradient(90deg,rgba(7,12,22,.36),transparent 26%,transparent 74%,rgba(7,12,22,.42))}.kv4-login-particle{position:absolute;--size:4px;--x:0px;--y:0px;--duration:18s;--delay:0s;width:var(--size);height:var(--size);border-radius:999px;background:radial-gradient(circle at 34% 28%,rgba(255,255,255,.92),color-mix(in oklch,var(--kv4-em) 68%,white) 28%,color-mix(in oklch,var(--kv4-em) 58%,transparent) 54%,transparent 76%);box-shadow:0 0 0 1px color-mix(in oklch,var(--kv4-em) 14%,transparent),0 0 calc(var(--size) * 4.8) color-mix(in oklch,var(--kv4-em) 32%,transparent);opacity:.68;transform:translateZ(0);animation:kv4-login-particle-flight var(--duration) ease-in-out infinite;animation-delay:var(--delay);mix-blend-mode:screen}.kv4-login-particle:after{content:"";position:absolute;top:50%;right:70%;width:calc(var(--size) * 10);height:max(1px,calc(var(--size) * .24));border-radius:999px;background:linear-gradient(90deg,transparent,color-mix(in oklch,var(--kv4-em) 34%,transparent));transform:translateY(-50%) rotate(-18deg);opacity:.46}.kv4-login-particle:nth-child(3n){background:radial-gradient(circle at 34% 28%,rgba(255,255,255,.88),color-mix(in oklch,var(--kv4-co) 62%,white) 26%,color-mix(in oklch,var(--kv4-co) 46%,transparent) 56%,transparent 76%);box-shadow:0 0 0 1px color-mix(in oklch,var(--kv4-co) 14%,transparent),0 0 calc(var(--size) * 4.8) color-mix(in oklch,var(--kv4-co) 28%,transparent)}.kv4-login-particle:nth-child(4n){filter:blur(.4px);opacity:.42}.kv4-login-particle:nth-child(5n){filter:blur(.8px);opacity:.28}.kv4-login-particle-1{top:8%;left:12%;--size:4px;--x:90px;--y:70px;--duration:18s;--delay:-4s}.kv4-login-particle-2{top:14%;left:38%;--size:2.5px;--x:-80px;--y:110px;--duration:24s;--delay:-12s}.kv4-login-particle-3{top:10%;left:72%;--size:5px;--x:-120px;--y:80px;--duration:20s;--delay:-8s}.kv4-login-particle-4{top:22%;left:18%;--size:3px;--x:140px;--y:-30px;--duration:28s;--delay:-17s}.kv4-login-particle-5{top:26%;left:50%;--size:6px;--x:80px;--y:120px;--duration:21s;--delay:-10s}.kv4-login-particle-6{top:24%;left:84%;--size:2px;--x:-130px;--y:-20px;--duration:31s;--delay:-24s}.kv4-login-particle-7{top:36%;left:9%;--size:5px;--x:120px;--y:90px;--duration:22s;--delay:-6s}.kv4-login-particle-8{top:40%;left:32%;--size:2.5px;--x:-60px;--y:-100px;--duration:26s;--delay:-15s}.kv4-login-particle-9{top:38%;left:64%;--size:4px;--x:120px;--y:-70px;--duration:19s;--delay:-11s}.kv4-login-particle-10{top:42%;left:91%;--size:3px;--x:-160px;--y:80px;--duration:27s;--delay:-20s}.kv4-login-particle-11{top:54%;left:16%;--size:2px;--x:80px;--y:-130px;--duration:32s;--delay:-28s}.kv4-login-particle-12{top:57%;left:45%;--size:5px;--x:-100px;--y:90px;--duration:23s;--delay:-3s}.kv4-login-particle-13{top:54%;left:78%;--size:3px;--x:-80px;--y:-100px;--duration:29s;--delay:-18s}.kv4-login-particle-14{top:66%;left:7%;--size:3.5px;--x:170px;--y:20px;--duration:20s;--delay:-7s}.kv4-login-particle-15{top:70%;left:30%;--size:7px;--x:110px;--y:-80px;--duration:25s;--delay:-14s}.kv4-login-particle-16{top:68%;left:58%;--size:2px;--x:-130px;--y:70px;--duration:34s;--delay:-22s}.kv4-login-particle-17{top:72%;left:88%;--size:4px;--x:-100px;--y:-110px;--duration:21s;--delay:-9s}.kv4-login-particle-18{top:82%;left:18%;--size:2.5px;--x:130px;--y:-60px;--duration:30s;--delay:-16s}.kv4-login-particle-19{top:86%;left:48%;--size:4px;--x:-70px;--y:-130px;--duration:22s;--delay:-5s}.kv4-login-particle-20{top:84%;left:76%;--size:2px;--x:90px;--y:-90px;--duration:33s;--delay:-25s}.kv4-login-particle-21{top:18%;left:6%;--size:2px;--x:160px;--y:160px;--duration:36s;--delay:-19s}.kv4-login-particle-22{top:18%;left:62%;--size:3px;--x:-150px;--y:150px;--duration:27s;--delay:-13s}.kv4-login-particle-23{top:32%;left:74%;--size:2px;--x:-90px;--y:160px;--duration:38s;--delay:-31s}.kv4-login-particle-24{top:50%;left:4%;--size:4.5px;--x:190px;--y:-20px;--duration:24s;--delay:-2s}.kv4-login-particle-25{top:48%;left:36%;--size:2px;--x:120px;--y:120px;--duration:35s;--delay:-27s}.kv4-login-particle-26{top:60%;left:68%;--size:6px;--x:-120px;--y:-140px;--duration:26s;--delay:-21s}.kv4-login-particle-27{top:78%;left:40%;--size:2.5px;--x:150px;--y:-90px;--duration:37s;--delay:-32s}.kv4-login-particle-28{top:90%;left:62%;--size:5px;--x:-160px;--y:-120px;--duration:28s;--delay:-23s}@keyframes kv4-vault-pulse{0%,to{opacity:.16;transform:scale(.98)}50%{opacity:.48;transform:scale(1.02)}}@keyframes kv4-login-particle-flight{0%,to{transform:translateZ(0) scale(.92);opacity:.28}15%{opacity:.7}48%{transform:translate3d(calc(var(--x) * .54),calc(var(--y) * .58),0) scale(1.08);opacity:.86}78%{transform:translate3d(var(--x),var(--y),0) scale(.86);opacity:.38}}@keyframes kv4-login-particle-glow{0%,to{transform:translateZ(0) scale(1);opacity:.42}44%{transform:translate3d(2%,-1%,0) scale(1.04);opacity:.68}72%{transform:translate3d(-1%,1%,0) scale(.98);opacity:.5}}.kv4-login-top{position:relative;z-index:1;display:flex;align-items:center;gap:12px}.kv4-login .kv4-brand-mark{width:38px;height:38px;display:grid;place-items:center}.kv4-login .kv4-brand-mark img{width:36px;height:36px;object-fit:contain}.kv4-login-brand{color:var(--kv4-fg);font-size:18px;font-weight:600}.kv4-brand-sub{margin-top:2px;color:var(--kv4-dim);font-family:var(--kv4-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase}.kv4-login-pitch{position:relative;z-index:1;max-width:610px;margin:auto 0}.kv4-login-pitch h2{margin:0;font-family:var(--kv4-display);font-feature-settings:var(--kv4-display-feat);font-size:clamp(46px,7vw,82px);line-height:.94;font-weight:620;letter-spacing:-.07em}.kv4-login-pitch h2 em{color:var(--kv4-em)}.kv4-login-pitch p{max-width:500px;margin:22px 0 0;color:var(--kv4-muted);font-size:14px;line-height:1.65}.kv4-login-feats{display:grid;gap:12px;max-width:500px;margin-top:28px}.kv4-lf{display:grid;grid-template-columns:38px 1fr;gap:12px;align-items:start;padding:12px;border:1px solid var(--kv4-line-soft);border-radius:14px;background:color-mix(in oklch,var(--kv4-surface) 62%,transparent);backdrop-filter:blur(6px)}.kv4-lf .kv4-t{color:var(--kv4-fg);font-size:13px;font-weight:600}.kv4-lf .kv4-d{margin-top:3px;color:var(--kv4-dim);font-size:11.5px;line-height:1.45}.kv4-ic-w{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;font-family:var(--kv4-mono);font-size:11px;font-weight:700;background:var(--kv4-em-tint);color:var(--kv4-em)}.kv4-login-right{display:grid;place-items:center;align-content:center;gap:16px;padding:44px;background:linear-gradient(180deg,var(--kv4-surface),var(--kv4-bg))}.kv4-viewport-choice{width:min(100%,430px);padding:12px;border:1px solid color-mix(in oklch,var(--kv4-line) 84%,transparent);border-radius:20px;background:radial-gradient(ellipse 80% 90% at 100% 0,color-mix(in oklch,var(--kv4-em) 8%,transparent),transparent 65%),color-mix(in oklch,var(--kv4-surface) 78%,transparent);box-shadow:inset 0 1px 0 rgba(255,255,255,.045),0 18px 48px rgba(0,0,0,.24)}.kv4-viewport-choice .viewport-choice-head{padding:0 4px 10px;color:var(--kv4-dim);font-family:var(--kv4-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase}.kv4-viewport-choice .viewport-choice-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.kv4-viewport-choice .viewport-choice-options a{display:flex;align-items:center;gap:10px;min-width:0;padding:11px 12px;border:1px solid var(--kv4-line-soft);border-radius:15px;background:color-mix(in oklch,var(--kv4-bg-2) 72%,transparent);color:var(--kv4-muted);text-decoration:none}.kv4-viewport-choice .viewport-choice-options a.on{border-color:var(--kv4-em);background:var(--kv4-em-tint);color:var(--kv4-fg);box-shadow:0 0 18px var(--kv4-em-glow)}.kv4-viewport-choice .viewport-choice-options svg{width:18px;height:18px;color:var(--kv4-em);flex-shrink:0}.kv4-viewport-choice .viewport-choice-options span{display:grid;gap:3px;min-width:0}.kv4-viewport-choice .viewport-choice-options b{font-size:12.5px;line-height:1}.kv4-viewport-choice .viewport-choice-options small{color:var(--kv4-dim);font-size:10.5px;line-height:1.25}.kv4-auth-card{position:relative;width:min(100%,430px);padding:32px;border:1px solid color-mix(in oklch,var(--kv4-line) 84%,transparent);border-radius:24px;background:radial-gradient(ellipse 78% 58% at 100% 0,color-mix(in oklch,var(--kv4-em) 10%,transparent),transparent 64%),linear-gradient(180deg,color-mix(in oklch,var(--kv4-surface) 94%,black),color-mix(in oklch,var(--kv4-bg-2) 96%,black));box-shadow:inset 0 1px 0 rgba(255,255,255,.055),0 34px 100px rgba(0,0,0,.46)}.kv4-auth-label{color:var(--kv4-dim);font-family:var(--kv4-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase}.kv4-auth-card h1{margin:8px 0 0;color:var(--kv4-fg);font-size:28px;letter-spacing:-.04em}.kv4-auth-card p{color:var(--kv4-muted);font-size:13px;line-height:1.5}.kv4-auth-fields{display:grid;gap:14px;margin-top:18px}.kv4-auth-field-shell{display:block;position:relative;margin-top:4px}.kv4-auth-field{width:100%;min-height:52px;padding:0 15px;border:1px solid color-mix(in oklch,var(--kv4-line) 86%,transparent);border-radius:15px;background:linear-gradient(180deg,color-mix(in oklch,var(--kv4-bg) 92%,black),color-mix(in oklch,var(--kv4-bg-2) 88%,black));color:var(--kv4-fg);font:500 14px/1 var(--kv4-sans);outline:none;box-shadow:inset 0 1px 0 rgba(255,255,255,.035)}.kv4-auth-field:focus{border-color:color-mix(in oklch,var(--kv4-em) 48%,var(--kv4-line));box-shadow:inset 0 1px 0 rgba(255,255,255,.045),0 0 0 3px color-mix(in oklch,var(--kv4-em) 12%,transparent)}.kv4-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:0 16px;border:1px solid var(--kv4-line);border-radius:999px;background:var(--kv4-surface-2);color:var(--kv4-fg);cursor:pointer;font-family:inherit}.kv4-btn-primary{position:relative;overflow:hidden;background:linear-gradient(180deg,oklch(78% .16 246),oklch(54% .19 252));color:var(--kv4-em-ink);border-color:transparent;font-weight:600;box-shadow:0 16px 32px -18px var(--kv4-em-glow),inset 0 1px 0 oklch(99% .04 245/.65)}.kv4-btn:disabled{opacity:.5;cursor:not-allowed}.kv4-auth-submit{width:100%;min-height:50px;margin-top:20px}.kv4-auth-switcher{display:flex;justify-content:space-between;gap:12px;margin-top:16px}.kv4-auth-switcher button{min-height:32px;border:1px solid transparent;border-radius:999px;background:transparent;color:var(--kv4-muted);font-family:var(--kv4-mono);font-size:11px;letter-spacing:.03em;cursor:pointer;padding:0 10px}.kv4-auth-switcher button:hover{color:var(--kv4-fg);border-color:var(--kv4-line-soft);background:color-mix(in oklch,var(--kv4-surface-2) 62%,transparent)}.kv4-login-lang{position:relative;z-index:5;width:224px;margin-top:28px}.kv4-login-lang .kv4-language-label{display:none}.kv4-language-switcher{position:relative;display:grid;gap:8px;min-width:0}.kv4-language-trigger{position:relative;display:grid;grid-template-columns:28px minmax(0,1fr) 15px;align-items:center;gap:10px;width:100%;min-height:38px;border:1px solid var(--kv4-line-soft);border-radius:13px;background:color-mix(in oklch,var(--kv4-surface-2) 76%,transparent);color:var(--kv4-fg);box-shadow:inset 0 1px 0 rgba(255,255,255,.035);cursor:pointer;font:650 12px/1 var(--kv4-mono);letter-spacing:.04em;outline:none;padding:0 12px;text-align:left}.kv4-login-lang .kv4-language-trigger{min-height:44px;grid-template-columns:30px minmax(0,1fr) 15px;border-radius:14px;background:linear-gradient(180deg,color-mix(in oklch,var(--kv4-surface) 84%,transparent),color-mix(in oklch,var(--kv4-bg-2) 92%,transparent))}.kv4-language-menu{position:absolute;z-index:60;top:calc(100% + 8px);right:0;min-width:min(220px,calc(100vw - 32px));border:1px solid var(--kv4-line);border-radius:16px;background:color-mix(in oklch,var(--kv4-bg-2) 96%,black);box-shadow:0 24px 60px rgba(0,0,0,.42);max-height:min(320px,calc(100dvh - 96px));overflow:auto;padding:6px;display:grid;gap:5px}.kv4-login-lang .kv4-language-menu{top:auto;right:auto;bottom:calc(100% + 10px);left:0;width:100%;min-width:224px}.kv4-language-menu button{display:grid;grid-template-columns:30px minmax(0,1fr) 14px;align-items:center;gap:10px;border-radius:11px;border:1px solid transparent;background:transparent;color:var(--kv4-muted);cursor:pointer;min-height:40px;padding:0 10px;text-align:left;font-size:12px;font-weight:650}.kv4-language-menu button.kv4-active,.kv4-language-menu button:hover{background:var(--kv4-em-tint-2);color:var(--kv4-fg)}.kv4-language-switcher.compact .kv4-language-trigger{min-width:72px}.kv4-language-flag{display:inline-grid;place-items:center;min-width:0;font-size:22px;line-height:1}.kv4-language-name{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.kv4-language-chevron{width:15px;height:15px;color:var(--kv4-dim)}.kv4-language-check{width:14px;height:14px;color:var(--kv4-co)}@media (max-width:980px){.kv4-login{min-height:100dvh;grid-template-columns:1fr;grid-template-rows:auto 1fr;align-items:start}.kv4-login-left{align-self:start;min-height:auto;height:auto;flex-direction:row;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;border-bottom:1px solid var(--kv4-line-soft);background:radial-gradient(ellipse 70% 120% at 0 0,color-mix(in oklch,var(--kv4-em) 10%,transparent),transparent 62%),linear-gradient(180deg,var(--kv4-bg-2),var(--kv4-bg));overflow:visible}.kv4-login-particles,.kv4-login-pitch,.kv4-login-vault{display:none}.kv4-login-lang{width:auto;min-width:88px;margin-top:0}.kv4-login-lang .kv4-language-trigger{min-height:36px;grid-template-columns:24px minmax(28px,1fr) 12px;padding:0 10px;border-radius:12px}.kv4-login-lang .kv4-language-menu{top:calc(100% + 10px);right:0;bottom:auto;left:auto;width:190px;min-width:190px;max-height:min(260px,calc(100dvh - 92px));overflow:auto}.kv4-login-right{align-items:start;padding:28px 24px 36px;background:var(--kv4-bg)}}@media (max-width:560px){.kv4-login-left{padding:12px 14px;gap:12px}.kv4-login .kv4-brand-mark{width:34px;height:34px}.kv4-login .kv4-brand-mark img{width:32px;height:32px}.kv4-login-brand{font-size:16px}.kv4-brand-sub{font-size:8.5px;letter-spacing:.1em}.kv4-login-lang{min-width:82px;max-width:none}.kv4-login-right{padding:18px 16px 28px}.kv4-auth-card{padding:24px 20px;border-radius:20px}}