html,body{margin:0}*{box-sizing:border-box}
.minimal-login{--login-paper:#fbfbfc;--login-ink:#242731;--login-muted:#696d78;--login-line:#d8dbe2;--login-accent:#323846;--login-wash:#ffffff;position:relative;isolation:isolate;min-height:100dvh;width:100%;margin:0!important;display:flex;align-items:center;justify-content:flex-end;padding:110px max(9vw,40px) 110px 40px;overflow:hidden;background:var(--login-paper);color:var(--login-ink);font-family:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif}
.minimal-login[data-site=doubao]{--login-accent:#4955a0;--login-paper:#fafbfe;--login-line:#d9dfeb}
.minimal-login[data-site=tkdata]{--login-accent:#126d64;--login-paper:#f9fcfb;--login-line:#d6e2df}
.minimal-login *{box-sizing:border-box}.minimal-login a{color:inherit;text-decoration:none}.minimal-login:before,.minimal-login:after{display:none!important}
.minimal-login-brand{position:absolute;top:36px;left:48px;display:flex;align-items:center;gap:12px;font-size:17px;font-weight:650;letter-spacing:-.3px;z-index:2}
.minimal-login-brand svg{width:24px;height:24px;color:var(--login-accent)}
.minimal-login-form{position:relative;z-index:2;width:min(100%,360px);margin:0 2vw 0 0;padding:0;background:transparent;border:0;box-shadow:none;text-align:left}
.minimal-login-form h1{font-size:32px;line-height:1.35;font-weight:600;letter-spacing:-1px;margin:0 0 40px;color:var(--login-ink);text-wrap:balance}
.minimal-login-form h1 span{display:block;font-size:17px;font-weight:400;letter-spacing:0;margin-top:8px;color:var(--login-muted)}
.minimal-login-form form{display:grid;gap:22px;margin:0}.minimal-login-form label{display:block;color:var(--login-ink);font-size:13px;font-weight:500;margin:0 0 8px;line-height:1.5}
.minimal-login-form input:not([type=hidden]){width:100%;height:50px;min-height:50px;padding:12px 14px;border:1px solid var(--login-line);border-radius:7px;background:var(--login-wash);color:var(--login-ink);font-family:inherit;font-size:16px;font-weight:400;line-height:1.5;box-shadow:none;outline:none;transition:border-color 160ms}
.minimal-login-form input:focus{border-color:var(--login-accent);outline:2px solid color-mix(in srgb,var(--login-accent) 18%,transparent);outline-offset:2px}
.minimal-login-form input::placeholder{color:#9296a1}.minimal-password{position:relative;display:block}.minimal-password input{padding-right:60px!important}
.minimal-password button{position:absolute;right:3px;top:3px;height:44px;min-width:50px;padding:0 10px;background:transparent;border:0;border-radius:5px;color:var(--login-muted);font-family:inherit;font-size:13px;cursor:pointer}
.minimal-submit{width:100%;min-height:50px;border:1px solid var(--login-accent);border-radius:7px;padding:12px 18px;background:var(--login-accent);color:white;font-family:inherit;font-size:15px;font-weight:550;line-height:1.4;box-shadow:none;cursor:pointer;transition:filter 150ms,transform 150ms;margin-top:2px;text-align:center;display:flex;align-items:center;justify-content:center}
.minimal-submit:hover{filter:brightness(1.1)}.minimal-submit:active{transform:scale(.99)}.minimal-submit:disabled{opacity:.45;cursor:not-allowed}
.minimal-login-form .field{margin:0}.minimal-login-form .error-text,.minimal-login-form [role=alert]{font-size:13px;color:#b3394d;margin:0;line-height:1.6}.minimal-login-form [role=alert]:empty{display:none}
.minimal-login-help{font-size:12px;color:var(--login-muted);line-height:1.7;margin:22px 0 0}.minimal-login-form [hidden]{display:none!important}
.minimal-login :focus-visible{outline:2px solid var(--login-accent);outline-offset:4px}
[data-login-motion]{position:absolute;inset:0;z-index:-1;pointer-events:none}.minimal-motion{width:100%;height:100%}.minimal-motion canvas{display:block;width:100%;height:100%;mask-image:linear-gradient(90deg,#000 0%,#000 26%,transparent 70%);opacity:.8}
.minimal-motion-button{position:fixed;right:48px;bottom:28px;z-index:5;pointer-events:auto;display:flex;align-items:center;gap:8px;min-height:44px;border:0;background:transparent;color:var(--login-muted);padding:8px 0 8px 12px;font-size:12px;font-family:inherit;cursor:pointer}
.minimal-login-status{position:absolute;left:48px;bottom:42px;font-size:12px;color:var(--login-muted);margin:0}
.minimal-login .auth-preview{margin-top:20px;border:0;background:transparent;color:var(--login-accent);font-size:13px;padding:0;min-height:44px;cursor:pointer}
body:has(.minimal-login){margin:0;background:var(--login-paper,#fbfbfc)}body:has(.minimal-login):before,body:has(.minimal-login):after{display:none!important}.login-wrap:has(.minimal-login){width:100%;padding:0;margin:0}.login-wrap:has(.minimal-login)>.alert{position:fixed;z-index:10;top:20px;left:50%;transform:translateX(-50%);max-width:calc(100% - 32px)}
@media(min-width:1800px){.minimal-login-form{margin-right:8vw;width:400px}.minimal-login-form h1{font-size:36px}.minimal-motion canvas{mask-image:linear-gradient(90deg,#000,transparent 70%)}}
@media(max-width:800px){.minimal-login{justify-content:center;padding:112px 28px 100px}.minimal-login-form{margin:0;width:min(100%,360px)}.minimal-login-brand{top:26px;left:28px;font-size:16px}.minimal-login-form h1{font-size:29px;margin-bottom:32px}.minimal-motion canvas{mask-image:linear-gradient(180deg,#000,transparent 28%,transparent 85%,#000);opacity:.55}.minimal-motion-button{right:28px;bottom:16px}.minimal-login-status{left:28px;bottom:30px}.minimal-login-form form{gap:20px}}
@media(prefers-reduced-motion:reduce){.minimal-login *{animation:none!important;transition:none!important}}

/* night-studio-20260908-180844: UI-only theme */
/* Night studio — appearance only; all existing layout and behavior stay intact. */
:root {
  --night-canvas: #0b1014;
  --night-panel: #121b22;
  --night-inset: #0e161c;
  --night-raised: #1a2730;
  --night-text: #ebf3f6;
  --night-secondary: #bac8cf;
  --night-muted: #9aaeb9;
  --night-line: rgba(179,210,220,.14);
  --night-control-line: #4d646f;
  --night-accent: #63dccb;
  --night-accent-hover: #91eadc;
  --night-accent-ink: #092c28;
  --night-selection: #183c38;
  --night-warning: #efc37a;
  --night-warning-bg: #332b1d;
  --night-danger: #ff9cae;
  --night-danger-bg: #34222b;
  color-scheme: dark;
  accent-color: var(--night-accent);
}
html, body { background-color: var(--night-canvas); color: var(--night-text); }
::selection { background: var(--night-accent); color: var(--night-accent-ink); }
input, textarea, select { caret-color: var(--night-accent); color-scheme: dark; }
select option { background: var(--night-panel); color: var(--night-text); }
input::placeholder, textarea::placeholder { color: var(--night-muted); opacity: 1; }
:focus-visible { outline-color: var(--night-accent); }
input:autofill { background: var(--night-inset); color: var(--night-text); }
input:-webkit-autofill, input:-webkit-autofill:hover, input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--night-text);
  caret-color: var(--night-accent);
  -webkit-box-shadow: 0 0 0 1000px var(--night-inset) inset;
}
dialog::backdrop { background: rgba(2,7,10,.78); }
button:disabled, input:disabled, select:disabled { cursor: not-allowed; }
@media (forced-colors: active) {
  :root { --night-accent: Highlight; --night-text: CanvasText; }
}

/* Reuse the existing canvas, motion toggle, form and markup. No new JS. */
.minimal-login,
.minimal-login[data-site=doubao],
.minimal-login[data-site=tiktok],
.minimal-login[data-site=tkdata] {
  --login-paper: var(--night-canvas);
  --login-ink: var(--night-text);
  --login-muted: var(--night-muted);
  --login-line: var(--night-control-line);
  --login-accent: var(--night-accent);
  --login-wash: var(--night-inset);
  background: radial-gradient(ellipse at 22% 42%, #123c39 0%, #0d2025 26%, transparent 59%), var(--night-canvas);
  color-scheme: dark;
}
body:has(.minimal-login) { background: var(--night-canvas); }
.minimal-login-brand { color: var(--night-text); }
.minimal-login-brand svg { color: var(--night-accent); filter: drop-shadow(0 0 12px #63dccb33); }
.minimal-login-form h1 { color: var(--night-text); text-shadow: 0 2px 30px #00000033; }
.minimal-login-form h1 span { color: var(--night-secondary); }
.minimal-login-form label { color: var(--night-secondary); }
.minimal-login-form input:not([type=hidden]) {
  background: var(--night-inset);
  color: var(--night-text);
  border-color: var(--night-control-line);
  box-shadow: inset 0 1px 0 #ffffff04;
}
.minimal-login-form input::placeholder { color: var(--night-muted); }
.minimal-login-form input:focus {
  background: #111f25;
  border-color: var(--night-accent);
  outline: 2px solid #63dccb66;
}
.minimal-password button { color: var(--night-secondary); }
.minimal-password button:hover { background: var(--night-raised); color: var(--night-accent); }
.minimal-login .minimal-submit {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: linear-gradient(120deg, #91eadc, var(--night-accent) 65%);
  color: var(--night-accent-ink);
  border-color: var(--night-accent);
  box-shadow: 0 4px 24px #63dccb14, inset 0 1px 0 #ffffff66;
  transition: transform 160ms cubic-bezier(.23,1,.32,1), opacity 160ms;
}
.minimal-login .minimal-submit:not(:disabled):hover { background: var(--night-accent-hover); filter: none; }
.minimal-login .minimal-submit:disabled { opacity: .48; box-shadow: none; }
.minimal-login-form .error-text, .minimal-login-form [role=alert] { color: var(--night-danger) !important; }
.minimal-login-help, .minimal-login-status { color: var(--night-muted); }
.minimal-motion { position: relative; isolation: isolate; }
.minimal-motion::before, .minimal-motion::after {
  content: "";
  position: absolute;
  inset: -8%;
  z-index: -1;
  pointer-events: none;
}
.minimal-motion::before {
  background: radial-gradient(ellipse at 27% 44%, #51c8b84d, transparent 35%), radial-gradient(ellipse at 5% 80%, #27657444, transparent 32%);
  opacity: .7;
  animation: night-light-drift 18s ease-in-out infinite alternate;
}
.minimal-motion::after {
  background: linear-gradient(115deg, transparent 22%, #79dccc09 30%, #89eee929 30.3%, #63dccb08 31%, transparent 39%);
  mask-image: radial-gradient(ellipse at 30% 42%, #000, transparent 62%);
  opacity: .7;
  animation: night-light-sweep 22s ease-in-out infinite alternate;
}
.minimal-motion canvas { filter: brightness(3.2) saturate(.45); opacity: .9; }
.minimal-motion-button { color: var(--night-secondary); }
.minimal-motion-button:hover, .minimal-motion-button:focus-visible { color: var(--night-accent); }
.minimal-motion[data-motion=paused]::before,
.minimal-motion[data-motion=paused]::after { animation-play-state: paused; }
.minimal-login .auth-preview { color: var(--night-accent); }
@keyframes night-light-drift {
  from { transform: translate3d(-2%, -2%, 0); opacity: .45; }
  to { transform: translate3d(3%, 3%, 0); opacity: .85; }
}
@keyframes night-light-sweep {
  from { transform: translate3d(-4%, 0, 0); opacity: .35; }
  to { transform: translate3d(5%, 2%, 0); opacity: .8; }
}
@media (max-width: 800px) {
  .minimal-login { background: radial-gradient(ellipse at 30% 0%, #123c39, transparent 48%), var(--night-canvas); }
  .minimal-motion::before, .minimal-motion::after { mask-image: linear-gradient(#000, transparent 30%, transparent 83%, #000); }
  .minimal-motion canvas { opacity: .5; }
}
@media (prefers-reduced-motion: reduce) {
  .minimal-login *, .minimal-login *::before, .minimal-login *::after {
    animation: none !important;
    transition: none !important;
  }
  .minimal-motion::before { opacity: .45; transform: none; }
  .minimal-motion::after { opacity: .3; transform: none; }
}
@media (forced-colors: active) {
  .minimal-login { background: Canvas; }
  .minimal-motion::before, .minimal-motion::after { display: none; }
  .minimal-login .minimal-submit { background: ButtonFace; color: ButtonText; border-color: ButtonText; }
}

/* identity-studio-20260908-183201: UI-only visual identities */
/* TikTok: dark screening room, pink signal and icy-blue edge lighting. */
:root {
  --night-canvas:#110e13; --night-panel:#1d1620; --night-inset:#171119;
  --night-raised:#2c202e; --night-text:#fff0f7; --night-secondary:#dcc3d2;
  --night-muted:#bda6b6; --night-line:#ffc5df20; --night-control-line:#826678;
  --night-accent:#ff91bc; --night-accent-hover:#ffbbd5; --night-accent-ink:#3b1023;
  --night-selection:#462338; --identity-shine:#8cfff1; --identity-outline:#ff91bc44;
}

/* Decorative layers only: existing fields, heading, layout and motion controls. */
.minimal-login[data-site] {
  --login-paper:var(--night-canvas); --login-wash:var(--night-inset);
  --login-ink:var(--night-text); --login-muted:var(--night-muted);
  --login-line:var(--night-control-line); --login-accent:var(--night-accent);
}
.minimal-login[data-site]::before {
  content:""; display:block !important; position:absolute; inset:0;
  z-index:-1; pointer-events:none;
}
.minimal-login-form::before {
  content:""; position:absolute; inset:-36px; z-index:-1; pointer-events:none;
  border:1px solid var(--identity-outline); border-radius:24px;
  background:color-mix(in srgb,var(--night-panel) 94%,transparent);
  box-shadow:0 30px 100px #00000060,inset 0 1px 0 #ffffff14;
}
.minimal-login-form::after {
  content:""; position:absolute; top:-36px; left:8%; width:38%; height:1px;
  background:linear-gradient(90deg,transparent,var(--identity-shine),transparent);
  box-shadow:0 0 16px var(--identity-outline); pointer-events:none;
}
.minimal-login-brand svg { filter:drop-shadow(0 0 12px var(--identity-outline)); }
.minimal-login .minimal-submit {
  background:linear-gradient(115deg,var(--night-accent-hover),var(--night-accent));
  color:var(--night-accent-ink); border-color:var(--night-accent);
  box-shadow:0 6px 30px var(--identity-outline),inset 0 1px 0 #ffffff77;
}
.minimal-login-form input:focus {
  background:var(--night-raised); border-color:var(--night-accent);
  outline:2px solid var(--identity-outline);
}
.minimal-login .minimal-submit:not(:disabled):hover { box-shadow:0 8px 36px var(--identity-outline),inset 0 1px 0 #ffffff88; }
.minimal-login-form .minimal-password button:focus-visible { outline-color:var(--night-accent); }
.minimal-motion-button { text-shadow:0 2px 10px #000; }
.minimal-motion[data-motion=paused]::before,
.minimal-motion[data-motion=paused]::after { animation-play-state:paused; }
@media(max-width:800px) {
  .minimal-login-form::before { inset:-24px -16px; border-radius:18px; }
  .minimal-login-form::after { top:-24px; }
}
@media(prefers-reduced-motion:reduce) {
  .minimal-login *, .minimal-login *::before, .minimal-login *::after {
    animation:none !important; transition:none !important;
  }
}
@media(forced-colors:active) {
  .minimal-login-form::before { background:Canvas; border-color:CanvasText; }
  .minimal-login[data-site]::before, .minimal-login-form::after { display:none !important; }
  .minimal-login .minimal-submit { color:ButtonText; background:ButtonFace; box-shadow:none; }
}

/* Offset neon planes, pink/ice split edge, energetic diagonal composition. */
.minimal-login[data-site=tiktok] {
  background:radial-gradient(ellipse at 16% 63%,#8f28485c,transparent 42%),radial-gradient(ellipse at 45% 25%,#23565b44,transparent 36%),var(--night-canvas);
}
.minimal-login[data-site=tiktok]::before {
  background:repeating-linear-gradient(0deg,transparent 0 5px,#ffffff06 5px 6px);
  mask-image:linear-gradient(90deg,#000,transparent 65%); opacity:.45;
}
.minimal-login[data-site=tiktok] .minimal-motion::before {
  inset:13% 57% 18% 9%; border-radius:20px;
  border:1px solid #ff91bc66;
  background:linear-gradient(145deg,#a3336059,#1d162026 60%);
  box-shadow:inset 2px 0 0 #ff91bc,0 0 50px #ff418433,18px 18px 0 -17px #ff91bc77;
  mask-image:none; opacity:.9;
  animation:tiktok-plane-a 13s ease-in-out infinite alternate;
}
.minimal-login[data-site=tiktok] .minimal-motion::after {
  inset:23% 50% 10% 20%; border-radius:20px;
  border:1px solid #8cfff155;
  background:linear-gradient(145deg,#8cfff110,transparent 60%);
  box-shadow:inset -2px 0 0 #8cfff1bb,0 0 54px #53ddd11a;
  mask-image:none; opacity:.85;
  animation:tiktok-plane-b 16s ease-in-out infinite alternate;
}
.minimal-login[data-site=tiktok] .minimal-motion canvas {
  opacity:.36; filter:brightness(3.5) saturate(1.5);
  mask-image:linear-gradient(115deg,#000,transparent 63%);
}
.minimal-login[data-site=tiktok] .minimal-login-form::before {
  border-radius:12px; background:linear-gradient(155deg,#302031f2,#1b131ff7);
  box-shadow:0 30px 100px #00000070,inset 1px 0 0 #ff91bc88,inset -1px 0 0 #8cfff155;
}
.minimal-login[data-site=tiktok] .minimal-login-form::after { background:linear-gradient(90deg,#ff91bc,transparent,#8cfff1);width:66%;left:17%; }
.minimal-login[data-site=tiktok] .minimal-login-form h1 { font-weight:750;letter-spacing:-1.5px;text-shadow:-1px 0 #8cfff166,1px 0 #ff91bc66; }
.minimal-login[data-site=tiktok] .minimal-login-brand svg { filter:drop-shadow(2px 1px 0 #8cfff1aa); }
@keyframes tiktok-plane-a { from{transform:rotate(-13deg) translateY(-1%)}to{transform:rotate(-9deg) translateY(2%)} }
@keyframes tiktok-plane-b { from{transform:rotate(12deg) translateY(2%)}to{transform:rotate(8deg) translateY(-2%)} }
@media(max-width:800px) {
  .minimal-login[data-site=tiktok] { background:radial-gradient(ellipse at 0% 0%,#8f284877,transparent 45%),radial-gradient(ellipse at 100% 100%,#23565b66,transparent 40%),var(--night-canvas); }
  .minimal-login[data-site=tiktok] .minimal-motion::before { inset:-12% 30% 70% -8%;opacity:.55; }
  .minimal-login[data-site=tiktok] .minimal-motion::after { inset:72% -6% -22% 40%;opacity:.45; }
  .minimal-login[data-site=tiktok] .minimal-motion canvas { opacity:.16; }
}

/* Follow site-specific animation shorthands so paused state cannot be reset. */
.minimal-login[data-site] .minimal-motion[data-motion=paused]::before,
.minimal-login[data-site] .minimal-motion[data-motion=paused]::after {
  animation-play-state:paused;
}
@media(prefers-reduced-motion:reduce) {
  .minimal-login[data-site] .minimal-motion::before,
  .minimal-login[data-site] .minimal-motion::after { animation:none !important; }
}
@media(forced-colors:active) {
  .minimal-login[data-site]::before,
  .minimal-login[data-site] .minimal-motion::before,
  .minimal-login[data-site] .minimal-motion::after,
  .minimal-login-form::after { display:none !important; }
}