/* WeldForms auth: dark workshop rail + steel ground, white sheet card. Mirrors the main app tokens. */
:root{
  --bg:#ECEEF1;--surface:#FFFFFF;--surface-2:#F6F7F9;--ink:#1B1F24;--muted:#59626E;--line:#D8DCE1;--line-strong:#B9C0C8;
  --accent:#FF5E1F;--accent-hover:#E64E12;--accent-soft:#FFF0E9;--accent-soft-ink:#A63208;
  --side:#1B1F24;--side-2:#262C33;--side-ink:#E4E7EB;--side-muted:#A3ACB7;
  --ok:#1E6B3A;--ok-soft:#E4F2E9;--bad:#A11D1D;--bad-soft:#FBE7E7;--warn:#8A4B00;--warn-soft:#FFF1DC;
  --f-sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-cond:"IBM Plex Sans Condensed","IBM Plex Sans",sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#111418;--surface:#1A1E23;--surface-2:#20252B;--ink:#E7EAEE;--muted:#9DA6B1;--line:#2D333A;--line-strong:#434B55;
  --accent-soft:#402318;--accent-soft-ink:#FFB698;--side:#0C0E11;--side-2:#1A1E23;
  --ok:#7FD39C;--ok-soft:#173123;--bad:#F29C9C;--bad-soft:#3A1818;--warn:#F2C27A;--warn-soft:#33270F;color-scheme:dark}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;min-height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--f-sans);font-size:15px;line-height:1.5}
button,input{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
h1{margin:0;font-size:24px;line-height:1.2;font-weight:700;text-wrap:balance}
.mono{font-family:var(--f-mono)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

.shell{display:flex;min-height:100dvh}
.rail{flex:0 0 380px;background:var(--side);color:var(--side-ink);padding:36px 36px 28px;display:flex;flex-direction:column;gap:40px;position:relative;overflow:hidden}
.rail::after{content:"";position:absolute;inset:auto -60px -60px auto;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,94,31,.22),transparent 65%);pointer-events:none}
.rail-brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:19px}
.rail-brand img{border-radius:8px}
.rail-copy{margin-top:auto}
.rail-kicker{font-family:var(--f-cond);text-transform:uppercase;letter-spacing:.12em;font-size:12px;color:var(--accent);margin:0 0 10px}
.rail-line{font-size:22px;line-height:1.35;font-weight:500;margin:0;max-width:28ch}
.rail-bead{display:flex;gap:0;height:16px}
.rail-bead span{width:28px;height:16px;border-radius:50% 50% 50% 50%/60% 60% 40% 40%;background:linear-gradient(180deg,#5a626c,#2c3239);
  border:1px solid #6b747f;margin-right:-8px;box-shadow:inset 0 2px 0 rgba(255,255,255,.12)}
.rail-bead span:last-child{background:linear-gradient(180deg,#FF8A55,#FF5E1F);border-color:#FF8A55}
.rail-foot{margin:0;font-family:var(--f-cond);letter-spacing:.08em;text-transform:uppercase;font-size:12px;color:var(--side-muted)}

.stage{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px max(16px,env(safe-area-inset-left)) 24px;gap:16px}
.card{width:min(460px,100%);background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:28px;
  box-shadow:0 1px 2px rgba(20,24,30,.08),0 8px 28px rgba(20,24,30,.10);border-top:3px solid var(--accent);animation:rise .28s ease-out}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.card-brand{display:none;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:18px}
.card-brand img{border-radius:7px}
section{display:flex;flex-direction:column;gap:14px;animation:rise .2s ease-out}
.eyebrow{margin:0;font-family:var(--f-cond);text-transform:uppercase;letter-spacing:.1em;font-size:12px;color:var(--muted);font-weight:600}
.lede{margin:0;color:var(--muted)}
.lede b{color:var(--ink)}
form{display:flex;flex-direction:column;gap:14px;margin-top:4px}
.field{display:flex;flex-direction:column;gap:6px}
.field label,.lbl{font-size:13px;font-weight:600;color:var(--muted)}
.input{width:100%;min-height:44px;padding:9px 12px;border:1px solid var(--line-strong);border-radius:8px;background:var(--surface)}
.input:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
.input[aria-invalid="true"]{border-color:var(--bad)}
.otp{font-family:var(--f-mono);font-size:24px;letter-spacing:.45em;text-align:center;padding-left:calc(12px + .45em);font-variant-numeric:tabular-nums}
.hint{margin:0;font-size:12.5px;color:var(--muted)}
.reveal{display:flex;gap:6px}
.reveal .input{flex:1;min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 16px;border-radius:8px;border:1px solid var(--line-strong);
  background:var(--surface);font-weight:600;cursor:pointer;transition:background .15s,border-color .15s}
.btn:hover{border-color:var(--muted)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.btn.ghost{background:transparent;border-color:var(--line)}
.btn.sm{min-height:44px;padding:0 12px;font-size:13px}
.btn.block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn[aria-busy="true"]::before{content:"";width:14px;height:14px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.row{display:flex;gap:8px;flex-wrap:wrap}
.grow{flex:1}
.links{display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding-top:10px;border-top:1px solid var(--line)}
.link{background:none;border:0;padding:6px 0;color:var(--accent-soft-ink);font-weight:600;cursor:pointer;text-decoration:underline;text-underline-offset:3px;text-align:left}
@media (prefers-color-scheme:light){.link{color:#B83C0B}}
.note{margin:0;font-size:13px;padding:10px 12px;border-radius:8px;background:var(--warn-soft);color:var(--warn)}
.alert{padding:11px 14px;border-radius:8px;background:var(--bad-soft);color:var(--bad);font-size:14px;font-weight:500;margin-bottom:14px;border-left:3px solid var(--bad)}
.alert.ok{background:var(--ok-soft);color:var(--ok);border-left-color:var(--ok)}
.qr-wrap{display:flex;gap:16px;align-items:center;padding:14px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;flex-wrap:wrap}
.qr-wrap img{background:#fff;padding:8px;border-radius:6px;border:1px solid var(--line);width:184px;height:184px}
.manual{display:flex;flex-direction:column;gap:8px;align-items:flex-start;flex:1;min-width:160px}
.key{font-family:var(--f-mono);font-size:14px;word-break:break-all;background:var(--surface);border:1px dashed var(--line-strong);padding:6px 8px;border-radius:6px;user-select:all}
.codes{margin:0;padding:14px 14px 14px 40px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 20px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;font-family:var(--f-mono);font-size:15px}
.codes li::marker{color:var(--muted);font-size:12px}
.check{display:flex;gap:10px;align-items:flex-start;cursor:pointer;font-weight:500}
.check input{width:20px;height:20px;margin:1px 0 0;accent-color:var(--accent);flex:none}
.loading{display:flex;flex-direction:column;gap:12px}
.sk{height:44px;border-radius:8px;background:linear-gradient(90deg,var(--surface-2),var(--line),var(--surface-2));background-size:200% 100%;animation:sh 1.2s linear infinite}
.sk-title{height:28px;width:60%}.sk-btn{background-color:var(--accent-soft)}
@keyframes sh{to{background-position:-200% 0}}
.foot{margin:0;font-size:12.5px;color:var(--muted);text-align:center}

@media (max-width:899px){
  .rail{display:none}
  .card-brand{display:flex}
  .stage{justify-content:flex-start;padding-top:max(28px,env(safe-area-inset-top))}
}
@media (max-width:420px){
  .card{padding:20px}
  .codes{grid-template-columns:1fr}
  .qr-wrap{justify-content:center}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}