/**
 * NEW BASIC — login.css
 * 스플릿 로그인: 좌 비주얼(잉크 + 애시드) / 우 폼. 플랫 · 그림자 없음.
 * 애니메이션은 transform 만 사용(GPU) — CPU 부하 없음. 다크모드: html.dark
 */
*,*::before,*::after{box-sizing:border-box}
html{--lg-bg:#fffefa;--lg-bg2:#f3f2ed;--lg-text:#20231f;--lg-mute:#6d6f66;--lg-line:#dedfd7;--lg-hot:#c23a22;--lg-btn:var(--lg-ink);--lg-btn-t:#fff}
html.dark{--lg-bg:#1e293b;--lg-bg2:#0f172a;--lg-text:#f1f5f9;--lg-mute:#94a3b8;--lg-line:#334155;--lg-hot:#ff775e;--lg-btn:var(--lg-acid);--lg-btn-t:#20231f}
body.lg-body{margin:0;font-family:'DM Sans','Pretendard',-apple-system,BlinkMacSystemFont,'Noto Sans KR',sans-serif;letter-spacing:-.025em;background:var(--lg-bg);color:var(--lg-text);-webkit-font-smoothing:antialiased;line-height:1.5}
a{color:inherit;text-decoration:none}
.lg{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-height:100vh;min-height:100dvh}

/* ═══ 좌: 비주얼 ═══ */
.lg-visual{position:relative;overflow:hidden;background:var(--lg-ink);color:#fff;display:flex;flex-direction:column;justify-content:space-between;padding:44px 52px;isolation:isolate}
html.dark .lg-visual{background:#11140f}
.lg-art{position:absolute;inset:0;z-index:-1;--o:min(38vh,26vw)}
.lg-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:radial-gradient(ellipse at 70% 40%,#000 15%,transparent 72%);mask-image:radial-gradient(ellipse at 70% 40%,#000 15%,transparent 72%)}
.lg-orb{position:absolute;right:-9%;top:13%;width:var(--o);aspect-ratio:1;border-radius:50%;background:var(--lg-acid)}
.lg-ring{position:absolute;right:calc(-9% - 7%);top:calc(13% - 7%);width:calc(var(--o) * 1.14);aspect-ratio:1;border-radius:50%;
  background:conic-gradient(from 0deg,var(--lg-acid) 0 22%,transparent 22% 100%);
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));mask:radial-gradient(farthest-side,transparent calc(100% - 3px),#000 calc(100% - 3px));
  animation:lgSpin 28s linear infinite;will-change:transform}
.lg-ring-2{width:calc(var(--o) * 1.34);right:calc(-9% - 17%);top:calc(13% - 17%);opacity:.45;animation-duration:46s;animation-direction:reverse;
  background:conic-gradient(from 90deg,#fff 0 9%,transparent 9% 100%)}
.lg-dx{position:absolute;right:-2%;bottom:5%;font-size:clamp(140px,21vw,320px);font-weight:800;letter-spacing:-.09em;line-height:.8;color:transparent;-webkit-text-stroke:1.5px rgba(255,255,255,.16);user-select:none}
@keyframes lgSpin{to{transform:rotate(360deg)}}

.lg-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.lg-shade{position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(17,19,16,.55) 0%,rgba(17,19,16,.15) 40%,rgba(17,19,16,.78) 100%)}

.lg-brand{display:inline-flex;align-items:center;gap:14px;align-self:flex-start}
.lg-sym{display:grid;place-items:center;width:50px;height:50px;border-radius:50%;background:var(--lg-acid);color:#20231f;font-weight:800;font-size:16px;letter-spacing:-.04em}
.lg-brand-t{display:flex;flex-direction:column;line-height:1.1}
.lg-brand-t small{font-size:10px;font-weight:800;letter-spacing:.2em;color:rgba(255,255,255,.6)}
.lg-brand-t b{font-size:20px;font-weight:800;letter-spacing:-.06em;margin-top:3px}

.lg-copy{max-width:520px}
.lg-copy h2{margin:0;font-size:clamp(38px,4.6vw,68px);font-weight:800;letter-spacing:-.07em;line-height:1.08}
.lg-copy h2 span{display:block}
.lg-copy h2 .is-acid{color:var(--lg-acid)}
.lg-copy p{margin:22px 0 0;font-size:15px;line-height:1.8;color:rgba(255,255,255,.7);max-width:420px}
.lg-foot{display:flex;justify-content:space-between;gap:16px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.5)}

/* ═══ 우: 폼 ═══ */
.lg-panel{position:relative;display:flex;align-items:center;justify-content:center;padding:84px 40px 48px;background:var(--lg-bg)}
.lg-back{position:absolute;top:34px;right:40px;display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--lg-mute);transition:color .15s}
.lg-back:hover{color:var(--lg-text)}
.lg-back i{font-size:11px}
.lg-box{width:100%;max-width:400px}
.lg-eyebrow{display:flex;align-items:center;gap:8px;font-size:10px;font-weight:800;letter-spacing:.2em;color:var(--lg-mute)}
.lg-eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--lg-acid);border:1px solid var(--lg-text)}
.lg-box h1{margin:12px 0 0;font-size:42px;font-weight:800;letter-spacing:-.06em;line-height:1.05}
.lg-sub{margin:12px 0 30px;font-size:14px;color:var(--lg-mute)}

.lg-flash{display:flex;align-items:center;gap:9px;margin:0 0 18px;padding:13px 15px;border-radius:4px;font-size:13px;font-weight:700;line-height:1.45}
.lg-flash i{flex-shrink:0}
.lg-flash.is-err{background:#ffdfd6;color:#8f2a14}
.lg-flash.is-ok{background:var(--lg-acid);color:#20231f}
.lg-flash.is-info{background:var(--lg-bg2);color:var(--lg-text);border:1px solid var(--lg-line)}

.lg-form{display:flex;flex-direction:column;gap:18px}
.lg-field{display:block}
.lg-label{display:block;margin-bottom:8px;font-size:12px;font-weight:700}
.lg-input{display:flex;align-items:center;gap:12px;height:54px;padding:0 16px;border:1px solid var(--lg-line);border-radius:4px;background:var(--lg-bg2);transition:border-color .15s,background .15s}
.lg-input:focus-within{border-color:var(--lg-text);background:var(--lg-bg)}
.lg-input>i{font-size:13px;color:var(--lg-mute);width:16px;text-align:center}
.lg-input input{flex:1;min-width:0;height:100%;border:0;outline:0;background:transparent;color:var(--lg-text);font:inherit;font-size:15px;letter-spacing:-.01em}
.lg-input input::placeholder{color:var(--lg-mute);opacity:.6}
.lg-input input:-webkit-autofill{-webkit-text-fill-color:var(--lg-text);transition:background-color 9999s}
.lg-eye{border:0;background:none;color:var(--lg-mute);cursor:pointer;padding:6px;margin-right:-6px;font-size:14px;line-height:1}
.lg-eye:hover{color:var(--lg-text)}
.lg-submit{display:flex;align-items:center;justify-content:center;gap:10px;height:56px;margin-top:6px;border:0;border-radius:99px;background:var(--lg-btn);color:var(--lg-btn-t);font:inherit;font-size:15px;font-weight:800;letter-spacing:-.02em;cursor:pointer;transition:background .15s,color .15s}
.lg-submit i{font-size:13px;transition:transform .2s}
.lg-submit:hover{background:var(--lg-acid);color:#20231f}
html.dark .lg-submit:hover{background:#fff}
.lg-submit:hover i{transform:translateX(4px)}
:focus-visible{outline:2px solid var(--lg-text);outline-offset:2px}

.lg-or{display:flex;align-items:center;gap:14px;margin:30px 0 16px;font-size:12px;font-weight:700;color:var(--lg-mute)}
.lg-or::before,.lg-or::after{content:"";flex:1;height:1px;background:var(--lg-line)}
.lg-social{display:flex;flex-direction:column;gap:8px}
.lg-sbtn{display:flex;align-items:center;gap:12px;height:48px;padding:0 8px 0 8px;border:1px solid var(--lg-line);border-radius:99px;font-size:13.5px;font-weight:700;transition:border-color .15s}
.lg-sbtn:hover{border-color:var(--lg-text)}
.lg-sico{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;font-size:14px;border:1px solid rgba(0,0,0,.08)}
.lg-sico b{font-family:sans-serif;font-size:14px;font-weight:900}
.lg-reg{margin:28px 0 0;font-size:13.5px;color:var(--lg-mute);text-align:center}
.lg-reg a{color:var(--lg-text);font-weight:800;border-bottom:2px solid var(--lg-acid);padding-bottom:1px}
html.dark .lg-reg a{border-bottom-color:var(--lg-acid)}

/* ═══ 반응형 ═══ */
@media (max-width:900px){
  .lg{grid-template-columns:minmax(0,1fr);grid-template-rows:auto 1fr}
  .lg-visual{padding:26px 24px 28px;gap:34px}
  .lg-copy h2{font-size:34px}
  .lg-copy p{margin-top:14px;font-size:14px}
  .lg-foot{display:none}
  .lg-orb{width:200px;right:-70px;top:-40px}
  .lg-ring{width:228px;right:-84px;top:-54px}
  .lg-ring-2{width:268px;right:-104px;top:-74px}
  .lg-dx{display:none}
  .lg-panel{align-items:flex-start;padding:40px 24px 48px}
  .lg-back{position:static;margin:0 0 26px;align-self:flex-start;display:none}
  .lg-box h1{font-size:34px}
}
@media (prefers-reduced-motion:reduce){.lg-ring{animation:none}}
.lg-snote{margin:12px 0 0;font-size:12px;color:var(--lg-mute);text-align:center}