/* NAS customer sign-up portal — MOCKUP (fable, 2026-10-24). Public-facing NAS brand: every colour
   is a BRAND.md / brand.css token (verbatim); Saira self-hosted; flat chrome rule = the signature.
   Layout is from STRUCTURE (one column → grid on wide screens); nothing depends on font widths,
   scrollbar width, zoom or one engine. Mock only: no NAS server code. */

@font-face{font-family:'Saira';font-style:normal;font-weight:100 900;font-stretch:100%;font-display:swap;src:url("fonts/saira-latin-normal.woff2") format("woff2")}
@font-face{font-family:'Saira';font-style:italic;font-weight:100 900;font-stretch:100%;font-display:swap;src:url("fonts/saira-latin-italic.woff2") format("woff2")}

/* ---- brand tokens, verbatim from brand.css ---- */
:root[data-theme="dark"]{
  --nas-bg:#1c2138; --nas-bg-deep:#141830;
  --nas-surface:linear-gradient(180deg, rgba(104,120,184,.22), rgba(56,64,112,.22));
  --nas-surface-hover:linear-gradient(180deg, rgba(168,176,216,.3), rgba(56,64,112,.3));
  --nas-border:#6878b8; --nas-border-hover:#a8b0d8;
  --nas-text:#e9ebf5; --nas-text-display:#f4f5fb; --nas-text-strong:#ffffff;
  --nas-text-muted:#a8b0d8; --nas-text-faint:#767fa8; --nas-text-emphasis:#c9cfe8;
  --nas-link:#a8b0d8; --nas-link-hover:#ffffff; --nas-link-rule:#384070; --nas-focus:#f8f8f8;
  --nas-chrome-h:linear-gradient(90deg,#384070,#6878b8 30%,#f8f8f8 50%,#6878b8 70%,#384070);
  --nas-ok:#7dd4a8; --nas-ok-bg:rgba(70,163,117,.18); --nas-ok-border:#46a375;
  --nas-warn:#ffd98a; --nas-warn-bg:rgba(217,161,60,.16); --nas-warn-border:#d9a13c;
  --nas-danger:#f09a99; --nas-danger-bg:rgba(196,80,79,.18); --nas-danger-border:#c4504f;
  --nas-disabled:#767fa8; --nas-disabled-bg:rgba(118,127,168,.12); --nas-disabled-border:rgba(118,127,168,.35);
  /* as the live driver app (driver.css, mirrored in the approved driver mocks) */
  --nas-cta:#384070; --nas-cta-hover:#4a5490; --nas-cta-text:#ffffff;
  --nas-fill:rgba(104,120,184,.14); --nas-fill-strong:rgba(104,120,184,.30);
  --nas-card-shadow:0 1px 2px rgba(0,0,0,.5), 0 8px 26px rgba(0,0,0,.55);
  --nas-input-bg:#141830; /* = --nas-bg-deep */
  --logo:url("img/nas-logo.png");
}
:root[data-theme="light"]{
  --nas-bg:#fdfdfe; --nas-bg-deep:#eef0f7;
  --nas-surface:#ffffff; --nas-surface-hover:#f4f5fa;
  --nas-border:#d4d9ea; --nas-border-hover:#6878b8;
  --nas-text:#3c4466; --nas-text-display:#2a3160; --nas-text-strong:#21253a;
  --nas-text-muted:#6a7193; --nas-text-faint:#7b82a6; --nas-text-emphasis:#2a3160;
  --nas-link:#2a3160; --nas-link-hover:#6878b8; --nas-link-rule:#a8b0d8; --nas-focus:#6878b8;
  --nas-chrome-h:linear-gradient(90deg,#384070,#6878b8 30%,#f8f8f8 50%,#6878b8 70%,#384070);
  --nas-ok:#1e7a4d; --nas-ok-bg:#e3f3ea; --nas-ok-border:#46a375;
  --nas-warn:#8a5f13; --nas-warn-bg:#faf0da; --nas-warn-border:#d9a13c;
  --nas-danger:#9e3331; --nas-danger-bg:#f9e7e7; --nas-danger-border:#c4504f;
  --nas-disabled:#9aa1bd; --nas-disabled-bg:#f0f1f6; --nas-disabled-border:#d4d9ea;
  --nas-cta:#2a3160; --nas-cta-hover:#384070; --nas-cta-text:#ffffff;
  --nas-fill:#eef0f7; --nas-fill-strong:#e1e5f2;
  --nas-card-shadow:0 1px 2px rgba(0,0,0,.06), 0 4px 10px rgba(0,0,0,.07), 0 14px 30px rgba(0,0,0,.07);
  --nas-input-bg:#ffffff;
  --logo:url("img/nas-logo-light.png");
}
:root{ --nas-font:'Saira', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; --pad:22px; }

*{box-sizing:border-box}
html{background:var(--nas-bg)}
body{margin:0;font:400 16px/1.5 var(--nas-font);color:var(--nas-text);background:var(--nas-bg);-webkit-font-smoothing:antialiased;min-height:100dvh}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{font-style:italic;font-weight:700;letter-spacing:-0.01em;line-height:1.08;color:var(--nas-text-display);margin:0}
h2{font-weight:600}
a{color:var(--nas-link);text-decoration:underline;text-decoration-color:var(--nas-link-rule);text-underline-offset:3px}
a:hover{color:var(--nas-link-hover);text-decoration-color:currentColor}
:focus-visible{outline:2px solid var(--nas-focus);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
[hidden]{display:none !important}

/* ---- header: logo + flat chrome rule (BRAND §5: straight line) ---- */
.hd{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px 12px;
  background-image:var(--nas-chrome-h);background-repeat:no-repeat;background-position:left bottom;background-size:100% 3px}
.hd-logo{display:block;width:120px;height:40px;background:var(--logo) no-repeat left center / contain}
.hd-help{font-size:14px;color:var(--nas-text-muted);text-decoration:none;white-space:nowrap}
.hd-help:hover{color:var(--nas-link-hover)}

/* ---- page frame: one column; two columns from 1024px (structure, not breakpoint-tuned pixels) ---- */
.pg{max-width:1120px;margin:0 auto;padding:20px 16px 48px}
.side{margin-bottom:18px}
.side h1{font-size:30px}
.side .lede{margin:8px 0 0;color:var(--nas-text-muted);font-size:15.5px;max-width:34em}
.steps{list-style:none;margin:16px 0 0;padding:0;display:none}
.card{background:var(--nas-surface);border:1px solid var(--nas-border);border-radius:14px;box-shadow:var(--nas-card-shadow);padding:var(--pad)}
.card + .card{margin-top:16px}
@media (min-width:1024px){
  .hd{padding:18px 32px 14px;background-size:100% 4px}
  .hd-logo{width:140px;height:46px}
  .pg{display:grid;grid-template-columns:minmax(260px,360px) minmax(0,680px);gap:48px;align-items:start;justify-content:center;padding:44px 32px 72px}
  .side{margin:0}
  .side h1{font-size:40px}
  .steps{display:block}
  .card{padding:28px 32px}
}

/* step rail (desktop) — the sequence IS the content, so it is numbered */
.steps li{display:grid;grid-template-columns:30px 1fr;gap:12px;align-items:center;padding:9px 0;color:var(--nas-text-muted);border-bottom:1px solid var(--nas-link-rule)}
.steps li:last-child{border-bottom:none}
.steps .n{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:14px;font-weight:600;border:1px solid var(--nas-border);color:var(--nas-text-muted);background:var(--nas-fill)}
.steps li[aria-current="step"]{color:var(--nas-text-display);font-weight:600}
.steps li[aria-current="step"] .n{background:var(--nas-cta);color:var(--nas-cta-text);border-color:var(--nas-cta)}
.steps li.done{color:var(--nas-text-muted)}
.steps li.done .n{background:var(--nas-ok-bg);color:var(--nas-ok);border-color:var(--nas-ok-border)}
.steps li.done .n svg{width:14px;height:14px}
.steps .lbl::after{content:attr(data-sub);display:block;font-size:13px;font-weight:400;color:var(--nas-text-faint)}

/* mobile progress line (structure: text + a 4-cell track) */
.prog{display:flex;align-items:center;gap:12px;margin:0 0 16px;font-size:14px;color:var(--nas-text-muted)}
.prog .track{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;flex:1;max-width:220px}
.prog .track i{display:block;height:4px;border-radius:2px;background:var(--nas-fill-strong)}
.prog .track i.on{background:var(--nas-border)}
.prog .track i.cur{background:var(--nas-text-muted)}
@media (min-width:1024px){ .prog{display:none} }

/* ---- card content ---- */
.card h2{font-size:24px}
.card .intro{margin:6px 0 0;color:var(--nas-text-muted);font-size:15px}
.fs{border:0;padding:0;margin:0;min-width:0}
.fs + .fs{margin-top:22px;padding-top:22px;border-top:1px solid var(--nas-border)}
.intro + .fs{margin-top:18px}
.fs legend{padding:0;font-style:italic;font-weight:600;font-size:18px;color:var(--nas-text-display);margin-bottom:4px}
.fs .hint{margin:0 0 10px;font-size:14px;color:var(--nas-text-muted)}
.f{display:flex;flex-direction:column;gap:6px;margin-top:16px}
.f label,.f .lab{font-size:14.5px;font-weight:600;color:var(--nas-text-emphasis)}
.f .opt{font-weight:400;color:var(--nas-text-faint)}
.f .help{font-size:13.5px;color:var(--nas-text-muted);margin:-2px 0 0}
.in{width:100%;min-height:48px;padding:11px 14px;border:1px solid var(--nas-border);border-radius:10px;background:var(--nas-input-bg);color:var(--nas-text-strong);line-height:1.4}
.in::placeholder{color:var(--nas-text-faint)}
.in:hover{border-color:var(--nas-border-hover)}
.in:focus{outline:2px solid var(--nas-focus);outline-offset:2px}
textarea.in{min-height:112px;resize:vertical}
select.in{appearance:none;-webkit-appearance:none;padding-right:44px;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'><path d='M3 6l5 5 5-5' fill='none' stroke='%23a8b0d8' stroke-width='2' stroke-linecap='round'/></svg>");background-repeat:no-repeat;background-position:right 14px center}
.in[readonly]{background:var(--nas-fill);color:var(--nas-text);border-style:dashed}
.lock{display:flex;align-items:flex-start;gap:8px;font-size:13.5px;color:var(--nas-text-muted)}
.lock svg{width:14px;height:14px;flex:none;margin-top:3px}
.row2{display:grid;grid-template-columns:1fr;gap:0 16px}
@media (min-width:560px){ .row2{grid-template-columns:1fr 1fr} }
.pin{font-size:28px;letter-spacing:.42em;text-align:center;padding-left:calc(14px + .42em);font-variant-numeric:tabular-nums;font-weight:600;min-height:60px}
.chk{display:flex;align-items:flex-start;gap:10px;font-size:15px;margin-top:12px;color:var(--nas-text)}
.chk input{width:22px;height:22px;margin:1px 0 0;flex:none;accent-color:var(--nas-border)}

/* choice lists (trading type, VAT registered): one tappable row per option, the radio itself is the marker */
.fs.f legend.lab{font-style:normal;font-size:14.5px;font-weight:600;color:var(--nas-text-emphasis);margin:0 0 2px}
.opts{display:grid;gap:8px}
.opts-2{grid-template-columns:1fr 1fr;max-width:320px}
.opt-row{display:flex;align-items:center;gap:12px;min-height:48px;padding:10px 14px;border:1px solid var(--nas-border);border-radius:10px;background:var(--nas-input-bg);cursor:pointer;font-weight:400;color:var(--nas-text)}
.opt-row:hover{border-color:var(--nas-border-hover)}
.opt-row input{width:22px;height:22px;margin:0;flex:none;accent-color:var(--nas-cta)}
.opt-row:has(input:checked){border-color:var(--nas-border-hover);box-shadow:0 0 0 1px var(--nas-border-hover);font-weight:600;color:var(--nas-text-strong)}
.opt-row:has(input:focus-visible){outline:2px solid var(--nas-focus);outline-offset:2px}

/* two-way switch (Email | Post, NET | EOM): the chosen side is filled AND its word is repeated in the line below */
.seg{display:inline-grid;grid-auto-flow:column;grid-auto-columns:1fr;border:1px solid var(--nas-border);border-radius:10px;overflow:hidden;background:var(--nas-input-bg)}
.seg-opt{position:relative;display:flex;align-items:center;justify-content:center;gap:8px;min-width:96px;min-height:46px;padding:10px 18px;cursor:pointer;font-weight:600;color:var(--nas-text-muted)}
.seg-opt + .seg-opt{border-left:1px solid var(--nas-border)}
.seg-opt input{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}
.seg-opt span::before{content:"";display:inline-block;width:12px;height:12px;border-radius:50%;border:2px solid currentColor;margin-right:8px;vertical-align:-1px;box-sizing:border-box}
.seg-opt:has(input:checked){background:var(--nas-cta);color:var(--nas-cta-text)}
.seg-opt:has(input:checked) span::before{background:currentColor;box-shadow:inset 0 0 0 2px var(--nas-cta)}
.seg-opt:has(input:focus-visible){outline:2px solid var(--nas-focus);outline-offset:-3px}
.terms{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.in-days{width:96px;text-align:center;font-variant-numeric:tabular-nums}
.terms-days{color:var(--nas-text-muted);margin-right:6px}
.terms-words{color:var(--nas-text);margin-left:6px}
.f.off .seg{opacity:1}

/* a field that does not apply: disabled box + the reason in words (BRAND §2 disabled tone) */
.f.off label{color:var(--nas-text-muted)}
.f.off .in{background:var(--nas-disabled-bg);border-color:var(--nas-disabled-border);color:var(--nas-text);cursor:not-allowed} /* anything already typed stays readable */
.f.off .chk{color:var(--nas-text-muted)}
.rv-sub{color:var(--nas-text-muted);font-size:14px}
.f.off .why{display:flex;align-items:center;gap:8px;margin:0;font-size:14px;color:var(--nas-text-muted)}
.f.off .why svg{width:16px;height:16px;flex:none}

/* field error: border + icon + words (never colour alone) */
.f.err .in{border-color:var(--nas-danger-border);box-shadow:0 0 0 1px var(--nas-danger-border)}
.msg{display:flex;align-items:flex-start;gap:8px;font-size:14px;line-height:1.35;margin:0}
.msg svg{width:18px;height:18px;flex:none;margin-top:1px}
.msg-err{color:var(--nas-danger)}
.msg-ok{color:var(--nas-ok)}

/* notice box (status colours, approved): icon + words */
.note{display:grid;grid-template-columns:22px 1fr;gap:12px;align-items:start;padding:14px 16px;border-radius:12px;border:1px solid;margin:16px 0 0;font-size:15px}
.note svg{width:22px;height:22px}
.note b{display:block;font-weight:600}
.note p{margin:4px 0 0}
.note-err{background:var(--nas-danger-bg);border-color:var(--nas-danger-border);color:var(--nas-danger)}
.note-err p{color:var(--nas-text)}
.note-warn{background:var(--nas-warn-bg);border-color:var(--nas-warn-border);color:var(--nas-warn)}
.note-warn p{color:var(--nas-text)}
.note-ok{background:var(--nas-ok-bg);border-color:var(--nas-ok-border);color:var(--nas-ok)}
.note-ok p{color:var(--nas-text)}
.note-info{background:var(--nas-fill);border-color:var(--nas-border);color:var(--nas-text-emphasis)}
.note-info p{color:var(--nas-text)}
.note a{color:inherit}

/* additional contacts: one bordered block per person */
.person{border:1px solid var(--nas-border);border-radius:12px;padding:16px;margin-top:14px;background:var(--nas-fill)}
.person .ph{display:flex;align-items:center;justify-content:space-between;gap:12px}
.person .ph b{font-style:italic;font-weight:600;color:var(--nas-text-display)}
.person .f{margin-top:12px}
.btn-add{display:inline-flex;align-items:center;gap:8px;margin-top:14px;min-height:44px;padding:10px 16px;border-radius:10px;border:1px dashed var(--nas-border);background:none;color:var(--nas-link);font-weight:600;cursor:pointer}
.btn-add:hover{border-color:var(--nas-border-hover);color:var(--nas-link-hover)}
.btn-add svg{width:16px;height:16px}
.addrow{margin-top:18px}
.addrow .help{margin:8px 0 0;font-size:13.5px;color:var(--nas-text-muted)}
.btn-x{min-height:36px;padding:6px 12px;border-radius:8px;border:none;background:none;color:var(--nas-text-muted);font-size:14px;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.btn-x:hover{color:var(--nas-link-hover)}

/* actions */
.act{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:26px;padding-top:22px;border-top:1px solid var(--nas-border)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:10px;border:none;font-weight:600;cursor:pointer;text-decoration:none}
.btn-primary{background:var(--nas-cta);color:var(--nas-cta-text)}
.btn-primary:hover{background:var(--nas-cta-hover)}
.btn-primary:disabled{background:var(--nas-disabled-bg);color:var(--nas-disabled);border:1px solid var(--nas-disabled-border);cursor:not-allowed}
.btn-ghost{background:var(--nas-fill);color:var(--nas-text)}
.btn-ghost:hover{background:var(--nas-fill-strong)}
.btn-wide{width:100%}
.btn svg{width:16px;height:16px}
.act .save{font-size:14px;color:var(--nas-text-muted);flex-basis:100%}

/* review page: sections as a definition list, "Change" per section */
.rv{border:1px solid var(--nas-border);border-radius:12px;margin-top:16px;overflow:hidden}
.rv .rh{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:var(--nas-fill);border-bottom:1px solid var(--nas-border)}
.rv .rh b{font-style:italic;font-weight:600;color:var(--nas-text-display);font-size:16px}
.rv .rh a{font-size:14px}
.rv dl{margin:0;padding:6px 16px 10px;display:grid;grid-template-columns:1fr;gap:0}
.rv .kv{display:grid;grid-template-columns:1fr;padding:8px 0;border-bottom:1px solid var(--nas-link-rule)}
.rv .kv:last-child{border-bottom:none}
.rv dt{font-size:13.5px;color:var(--nas-text-muted)}
.rv dd{margin:0;color:var(--nas-text-strong);overflow-wrap:anywhere}
.rv dd.empty{color:var(--nas-text-faint);font-style:italic}
@media (min-width:560px){ .rv .kv{grid-template-columns:minmax(140px,36%) 1fr;gap:16px} }
.fine{font-size:14px;color:var(--nas-text-muted);margin:18px 0 0}

/* confirmation / terminal states */
.done .big{display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:center}
.done .big .ic{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:var(--nas-ok-bg);border:1px solid var(--nas-ok-border);color:var(--nas-ok)}
.done .big .ic svg{width:28px;height:28px}
.done .big.warn .ic{background:var(--nas-warn-bg);border-color:var(--nas-warn-border);color:var(--nas-warn)}
.done .big.info .ic{background:var(--nas-fill);border-color:var(--nas-border);color:var(--nas-text-emphasis)}
.done h2{font-size:26px}
.done .f{margin-top:22px}
.next{list-style:none;margin:20px 0 0;padding:0}
.next li{display:grid;grid-template-columns:28px 1fr;gap:12px;padding:10px 0;border-top:1px solid var(--nas-link-rule)}
.next li:last-child{border-bottom:1px solid var(--nas-link-rule)}
.next .n{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:600;background:var(--nas-fill);border:1px solid var(--nas-border);color:var(--nas-text-muted)}
.ref{display:inline-block;margin-top:4px;padding:4px 12px;border-radius:8px;background:var(--nas-fill);border:1px solid var(--nas-border);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:.06em;color:var(--nas-text-display)}

/* contact block ("no PIN?") */
.contact{display:grid;gap:12px;margin-top:16px}
.contact .c{display:grid;grid-template-columns:22px 1fr;gap:12px;align-items:start;padding:12px 14px;border-radius:12px;background:var(--nas-fill);border:1px solid var(--nas-border)}
.contact .c svg{width:22px;height:22px;color:var(--nas-text-muted)}
.contact .c b{display:block;font-weight:600;color:var(--nas-text-display)}
.contact .c a{font-size:17px}
.contact .c small{display:block;color:var(--nas-text-muted);font-size:13.5px}

footer{margin:28px auto 0;max-width:1120px;padding:0 16px;font-size:13px;color:var(--nas-text-faint)}
@media (min-width:1024px){ footer{padding:0 32px} }
@media (prefers-reduced-motion:no-preference){ .in,.btn,.steps .n{transition:background-color .15s,border-color .15s} }