:root{
  --ground:#e4e0d4; --paper:#faf8f1; --card:#fffdf7; --tint:#f4f1e7;
  --ink:#0d1b2a; --ink-soft:#55606d; --ink-faint:#8d9099;
  --line:#e7e1d1; --night:#07182d; --cream:#fdf7ea;
  --glow:#ff8f1f; --glow-soft:#ffb763; --glow-text:#8f4a00; --good:#2f7d51; --bad:#9c3b2e;
}


.v16-auth *{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);
  font-family:"Inter",system-ui,sans-serif;font-weight:300;font-size:16px;line-height:1.5;
  -webkit-font-smoothing:antialiased;min-height:100vh}

/* ——— the page: landing shell, one sheet, the nav pill above it ——— */
.v16-auth.shell{max-width:1420px;margin:0 auto;padding:16px;min-height:100vh;display:flex;flex-direction:column}
.v16-auth nav{position:sticky;top:10px;z-index:80;display:flex;align-items:center;gap:20px;margin:0 0 14px;padding:10px 14px 10px 26px;
  background:rgba(255,253,247,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-radius:999px;
  box-shadow:0 1px 0 rgba(13,27,42,.06),0 12px 30px rgba(13,27,42,.09)}
.v16-auth nav .mark{display:flex;align-items:center}
.v16-auth nav .mark img{height:38px;width:auto;display:block}
.v16-auth nav .back{margin-left:auto;font-size:14.5px;font-weight:500;color:var(--ink-soft);text-decoration:none;display:inline-flex;align-items:center;gap:8px;padding:0 6px}
.v16-auth nav .back:hover{color:var(--ink)}
.v16-auth .sheet{background:var(--paper);border-radius:34px;flex:1;display:flex;align-items:center;justify-content:center;padding:56px 44px 72px;position:relative;overflow:hidden}
/* the ambient jet, the landing's own asset, top-right and quiet */
.v16-auth .sheet .art{position:absolute;right:-6%;top:-4%;width:46%;opacity:.16;pointer-events:none;
  -webkit-mask-image:linear-gradient(to right,transparent 0,#000 40%);mask-image:linear-gradient(to right,transparent 0,#000 40%)}
.v16-auth .sheet .art img{width:100%;height:auto;display:block}

/* ——— the card ——— */
.v16-auth .auth{position:relative;z-index:2;width:100%;max-width:440px}
.v16-auth .brand{text-align:left;margin:0 0 30px}
.v16-auth h1{margin:0;font-family:"Inter",system-ui,sans-serif;font-weight:400;font-size:38px;letter-spacing:-.036em;line-height:1.04}
.v16-auth .sub{margin:10px 0 0;color:var(--ink-soft);font-size:16.5px}
.v16-auth .sub b{font-weight:500;color:var(--ink)}
.v16-auth .panel{background:var(--card);border:1px solid var(--line);border-radius:26px;padding:34px 30px;
  box-shadow:0 1px 2px rgba(13,27,42,.05),0 10px 30px -12px rgba(13,27,42,.18)}
.v16-auth form{display:flex;flex-direction:column;gap:14px}
.v16-auth .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 28px;width:100%;
  border-radius:999px;border:1px solid transparent;background:var(--card);color:var(--ink);
  font-family:"Inter",sans-serif;font-weight:400;font-size:15.5px;cursor:pointer;text-decoration:none;
  box-shadow:0 1px 2px rgba(13,27,42,.12),0 8px 20px rgba(13,27,42,.14);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease}
.v16-auth .btn:hover{transform:translateY(-2px);box-shadow:0 2px 4px rgba(13,27,42,.12),0 14px 30px rgba(13,27,42,.18)}
.v16-auth .btn-glow{background:var(--glow);color:#26140a;box-shadow:0 1px 2px rgba(13,27,42,.12),0 8px 20px rgba(255,143,31,.35)}
.v16-auth .btn-glow:hover{background:#ffa03c}
.v16-auth .btn-quiet{background:var(--tint);border-color:rgba(13,27,42,.12);box-shadow:none}
.v16-auth .btn-quiet:hover{background:#ece8dc;transform:none;box-shadow:none}
.v16-auth .or{display:flex;align-items:center;gap:12px;color:var(--ink-faint);font-size:13px;margin:2px 0}
.v16-auth .or::before,.v16-auth .or::after{content:"";flex:1;border-top:1px solid var(--line)}
.v16-auth label{display:block;font-size:13.5px;font-weight:500;color:var(--ink);margin:0 0 6px}
.v16-auth .label-row{display:flex;justify-content:space-between;align-items:baseline}
.v16-auth .label-row a{font-size:13px;color:var(--ink-soft);text-decoration:none;font-weight:400}
.v16-auth .label-row a:hover{color:var(--ink)}
.v16-auth .field{width:100%;min-height:46px;border-radius:12px;border:1px solid var(--line);background:#fff;padding:0 14px;
  font:400 15.5px Inter,system-ui,sans-serif;color:var(--ink);outline:none;transition:border-color .15s,box-shadow .15s}
.v16-auth .field::placeholder{color:#b3b6bd}
.v16-auth .field:focus{border-color:var(--glow);box-shadow:0 0 0 3px rgba(255,143,31,.18)}
.v16-auth .hint{margin:6px 0 0;font-size:12.5px;color:var(--ink-faint)}
.v16-auth .msg{border-radius:12px;padding:11px 14px;font-size:14px}
.v16-auth .msg.err{background:rgba(156,59,46,.08);color:var(--bad);border:1px solid rgba(156,59,46,.18)}
.v16-auth .msg.err a{color:inherit;font-weight:500}
.v16-auth .msg.ok{background:rgba(47,125,81,.09);color:var(--good);border:1px solid rgba(47,125,81,.18)}
.v16-auth .foot{margin:18px 0 0;text-align:center;color:var(--ink-soft);font-size:14.5px}
.v16-auth .foot a{color:var(--ink);font-weight:500;text-decoration:none;border-bottom:1px solid rgba(13,27,42,.25)}
/* success state */
.v16-auth .success{text-align:center;padding:10px 4px 6px}
.v16-auth .success .tile{width:52px;height:52px;border-radius:16px;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#1d3d61,var(--night));color:var(--cream)}
.v16-auth .success h2{margin:0;font-family:"Inter",system-ui,sans-serif;font-weight:500;font-size:22px;letter-spacing:-.02em}
.v16-auth .success p{margin:8px 0 0;color:var(--ink-soft);font-size:15px}
.v16-auth .success .again{margin-top:16px;background:none;border:0;color:var(--ink);font:500 14px Inter,system-ui,sans-serif;cursor:pointer;border-bottom:1px solid rgba(13,27,42,.25);padding:0}
@media(max-width:640px){
  .v16-auth nav{margin:0 0 12px;padding:8px 10px 8px 18px}.v16-auth nav .mark img{height:30px}
  /* phones: the card sits near the top, not floating mid-screen on a tall viewport */
  .v16-auth.shell{min-height:0}.v16-auth .sheet{padding:28px 22px 48px;align-items:flex-start;min-height:calc(100vh - 80px)}.v16-auth .sheet .art{width:80%;right:-20%;top:-2%;opacity:.12}
  .v16-auth h1{font-size:32px}.v16-auth .panel{padding:24px 20px}
}
@media (prefers-reduced-motion: reduce){.v16-auth .btn{transition:none}.v16-auth .btn:hover{transform:none}}

/* ——— the gate, as this sheet's card body (system pages, 2026-09-04) ———
   The approved system-pages mockup draws the gate as its own paper card on the
   silver ground. Inside the Sign-in room the sheet has ALREADY drawn a paper
   card, and a second one inside it would be two cards deep with two wordmarks
   above them, so the sign-in error renders the gate's body only: the same
   mark, the same title, the same lead, in this sheet's own proportions. Those
   proportions are the sheet's success block, unchanged, so the error state and
   the check-your-email state are the same shape. */
.v16-auth .gate{text-align:center;padding:10px 4px 6px}
.v16-auth .gate .mark{width:44px;height:44px;margin:0 auto 14px}
.v16-auth .gate .mark svg{width:100%;height:100%}
.v16-auth .gate h2{margin:0;font-family:"Inter",system-ui,sans-serif;font-weight:500;font-size:22px;letter-spacing:-.02em}
.v16-auth .gate .lead{margin:8px 0 0;color:var(--ink-soft);font-size:15px}
.v16-auth .gate .actions{display:flex;flex-direction:column;gap:10px;margin-top:18px}