/* TapChart design system. Shared by every page.
   Contrast (WCAG 2.2): navy on white 12.4:1, secondary text on white 5.2:1 and on page background 4.8:1,
   dark pink on white 6.3:1, white on dark pink 6.3:1, field borders 4.0:1, status text on its tint 5.7–6.8:1.
   Bright logo pink (#E64A83, 3.7:1) is decoration only: never small text, never a control. */
:root{
  --navy:#203457; --navy-900:#162640; --pink:#E64A83; --pink-dark:#B71F5B; --pink-darker:#8B1545;
  --text:#203457; --text-2:#55708B; --bg:#F5F8FB; --surface:#FFFFFF; --border:#D5E0E9; --field-border:#6B8299;
  --info-bg:#EAF0F7; --pink-bg:#FDEEF4;
  --ok:#1E6B46; --ok-bg:#E7F4EC; --warn:#7A4B00; --warn-bg:#FFF4DB; --bad:#A3262A; --bad-bg:#FCEAEA;
  --left:#2B6CB0; --right:#B71F5B;
  --focus:#203457;
  --radius:12px; --radius-sm:8px;
  --shadow:0 1px 2px rgba(32,52,87,.06),0 4px 16px rgba(32,52,87,.06);
  --font:"Atkinson Hyperlegible Next","Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:400 1.125rem/1.6 var(--font);overflow-wrap:break-word}
img,svg,video,canvas{max-width:100%}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;font-weight:700;color:var(--navy);letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.6vw,2.75rem)}
h2{font-size:clamp(1.45rem,3.2vw,1.9rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
a{color:var(--navy);text-decoration:underline;text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
strong,b{font-weight:700}
small,.small{font-size:1rem}
.muted{color:var(--text-2)}
.lede{font-size:1.25rem;color:var(--text);max-width:40ch}
.mono,code{font-family:var(--mono);font-size:.95em}
ul,ol{padding-left:1.4em;margin:0 0 1em}
li+li{margin-top:.35em}

/* Focus: always visible, never removed */
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}
/* headings receive focus from script after a view change; they aren't controls, so no ring */
[tabindex="-1"]:focus{outline:none}
.on-dark :focus-visible{outline-color:#FFFFFF}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:16px;top:-100px;background:var(--navy);color:#fff;padding:12px 18px;border-radius:var(--radius-sm);z-index:100;font-weight:700}
.skip:focus{top:12px;color:#fff}

/* Layout */
.container{width:100%;max-width:1120px;margin:0 auto;padding-inline:16px}
.container.narrow{max-width:760px}
@media (min-width:720px){.container{padding-inline:24px}}
main{display:block;padding-block:24px 56px}
.stack>*+*{margin-top:1rem}
.stack-lg>*+*{margin-top:1.75rem}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.grid{display:grid;gap:16px}
.grid-2{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.grid-3{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr))}
section{scroll-margin-top:16px}

/* Header / footer */
.site-header{background:var(--surface);border-bottom:1px solid var(--border)}
.site-header .container{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;padding-block:10px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;min-height:48px}
.brand img{width:40px;height:40px;flex:none}
.wordmark{font-weight:800;font-size:1.4rem;letter-spacing:.04em;line-height:1}
.wordmark .tap{color:var(--navy)} .wordmark .chart{color:var(--pink-dark)}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px 6px;align-items:center}
.site-nav li+li{margin-top:0}
.site-nav a{display:inline-flex;align-items:center;min-height:44px;padding:6px 10px;border-radius:var(--radius-sm);text-decoration:none;font-weight:700}
.site-nav a:hover{background:var(--info-bg)}
.site-nav a[aria-current="page"]{background:var(--info-bg);box-shadow:inset 0 -3px 0 var(--pink-dark)}
.account{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;font-size:1rem}
.account .who{color:var(--text-2);max-width:26ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media (max-width:719px){
  .site-header .container{gap:4px 12px;padding-block:6px}
  .brand img{width:34px;height:34px} .wordmark{font-size:1.2rem}
  .account{margin-left:auto} .account .who{display:none}
  .account .btn{min-height:44px;padding:6px 14px;font-size:1rem}
  .site-nav{order:3;width:100%} .site-nav a{min-height:44px;padding:6px 10px}
}
.site-footer{background:var(--navy-900);color:#fff;padding-block:40px 32px;font-size:1rem}
.site-footer a{color:#fff}
.site-footer .muted{color:#C9D6E3}
.site-footer .cols{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}
.site-footer h2{color:#fff;font-size:1.1rem}
.site-footer ul{list-style:none;padding:0}
.site-footer .wordmark .tap{color:#fff} .site-footer .wordmark .chart{color:#F4A6C3}

/* Buttons: 48px minimum target, large patient variant */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 22px;border-radius:10px;
  border:2px solid transparent;font:700 1.0625rem/1.2 var(--font);text-decoration:none;cursor:pointer;text-align:center;
  background:var(--navy);color:#fff}
.btn:hover{background:var(--navy-900);color:#fff}
.btn-pink{background:var(--pink-dark);color:#fff}
.btn-pink:hover{background:var(--pink-darker)}
.btn-secondary{background:var(--surface);color:var(--navy);border-color:var(--navy)}
.btn-secondary:hover{background:var(--info-bg);color:var(--navy)}
.btn-danger{background:var(--surface);color:var(--bad);border-color:var(--bad)}
.btn-danger:hover{background:var(--bad-bg);color:var(--bad)}
.btn-danger-solid{background:var(--bad);color:#fff}
.btn-danger-solid:hover{background:#7F1D21}
.btn-quiet{background:transparent;color:var(--navy);border-color:transparent;text-decoration:underline;padding-inline:10px}
.btn-quiet:hover{background:var(--info-bg);color:var(--navy)}
.btn-lg{min-height:60px;padding:14px 28px;font-size:1.2rem;border-radius:12px}
.btn-block{width:100%}
.btn[disabled],.btn[aria-disabled="true"]{background:#C9D3DD;color:#3D5068;border-color:#C9D3DD;cursor:not-allowed}
.btn svg{flex:none}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* Cards and panels */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
@media (min-width:720px){.card{padding:28px}}
.card.flat{box-shadow:none}
.card>h2:first-child,.card>h3:first-child{margin-top:0}
.eyebrow{font-size:.95rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--pink-dark);margin:0 0 .5em}

/* Notices: icon + text, never color alone */
.notice{display:flex;gap:12px;align-items:flex-start;border-radius:var(--radius-sm);padding:14px 16px;border:1px solid var(--border);background:var(--info-bg);color:var(--navy)}
.notice .ic{flex:none;width:24px;height:24px;margin-top:2px}
.notice>div{min-width:0}
.notice.ok{background:var(--ok-bg);border-color:#9CCBB0;color:var(--ok)}
.notice.warn{background:var(--warn-bg);border-color:#E3C27A;color:var(--warn)}
.notice.bad{background:var(--bad-bg);border-color:#E4A1A3;color:var(--bad)}
.notice.sample{background:var(--pink-bg);border-color:#EDB3C9;color:var(--navy)}
.notice p{color:inherit}
.notice strong{color:inherit}

/* Status badges: text + icon */
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:3px 12px;font-size:.95rem;font-weight:700;border:1.5px solid currentColor;line-height:1.4;max-width:100%}
.badge svg{width:16px;height:16px;flex:none}
.badge.ok{color:var(--ok);background:var(--ok-bg)} .badge.warn{color:var(--warn);background:var(--warn-bg)}
.badge.bad{color:var(--bad);background:var(--bad-bg)} .badge.info{color:var(--navy);background:var(--info-bg)}
.badge.sample{color:var(--pink-dark);background:var(--pink-bg)}
.badge.neutral{color:var(--text-2);background:var(--surface)}

/* Forms */
.field{display:grid;gap:6px}
.field+.field{margin-top:16px}
label,.label{font-weight:700;color:var(--navy)}
.hint{font-size:1rem;color:var(--text-2);margin:0}
.error-text{font-size:1rem;color:var(--bad);font-weight:700;margin:0}
input[type=text],input[type=email],input[type=password],input[type=search],input[type=tel],input:not([type]),select,textarea{
  width:100%;min-height:52px;padding:12px 14px;border:2px solid var(--field-border);border-radius:var(--radius-sm);
  background:var(--surface);color:var(--text);font:400 1.125rem/1.4 var(--font)}
textarea{min-height:96px;resize:vertical}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-color:var(--navy)}
input[aria-invalid="true"]{border-color:var(--bad)}
fieldset{border:0;margin:0;padding:0;min-width:0}
legend{font-weight:700;padding:0;margin-bottom:8px;color:var(--navy)}
.choice{display:flex;gap:12px;align-items:flex-start;border:2px solid var(--field-border);border-radius:var(--radius-sm);padding:14px 16px;cursor:pointer;background:var(--surface)}
.choice+.choice{margin-top:10px}
.choice input{width:24px;height:24px;margin:2px 0 0;flex:none;accent-color:var(--navy)}
.choice:has(input:checked){border-color:var(--navy);box-shadow:inset 0 0 0 1px var(--navy);background:var(--info-bg)}
.choice .t{font-weight:700;display:block}
.choice .muted{display:block;font-weight:400}
.password-row{display:flex;gap:8px}
.password-row input{flex:1;min-width:0}

/* Tabs as plain links/buttons with aria-current */
.segmented{display:flex;flex-wrap:wrap;gap:6px;background:var(--info-bg);border-radius:12px;padding:6px}
.segmented button,.segmented a{flex:1 1 auto;min-height:48px;border:0;border-radius:8px;background:transparent;color:var(--navy);font:700 1.0625rem var(--font);cursor:pointer;padding:8px 14px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.segmented [aria-pressed="true"],.segmented [aria-current="page"],.segmented [aria-selected="true"]{background:var(--surface);box-shadow:0 1px 3px rgba(32,52,87,.2)}

/* Stepper */
.stepper{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.stepper li{margin:0;display:flex;align-items:center;gap:8px;font-size:1rem;color:var(--text-2);padding:6px 12px 6px 6px;border-radius:999px;background:var(--surface);border:1px solid var(--border)}
.stepper .n{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--info-bg);color:var(--navy);font-weight:700}
.stepper li[aria-current="step"]{color:var(--navy);font-weight:700;border-color:var(--navy);box-shadow:inset 0 0 0 1px var(--navy)}
.stepper li[aria-current="step"] .n{background:var(--navy);color:#fff}
.stepper li.done .n{background:var(--ok);color:#fff}
.stepper li.done{color:var(--ok)}

/* Key-value and stat tiles */
.stats{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(min(100%,180px),1fr))}
.stat{border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;background:var(--surface)}
.stat .k{font-size:1rem;color:var(--text-2);margin:0}
.stat .v{font-size:1.6rem;font-weight:700;margin:2px 0 0;font-variant-numeric:tabular-nums;line-height:1.2}
.stat .v small{font-size:1rem;font-weight:400;color:var(--text-2)}
dl.kv{display:grid;grid-template-columns:minmax(0,max-content) minmax(0,1fr);gap:6px 16px;margin:0}
dl.kv dt{color:var(--text-2)} dl.kv dd{margin:0;font-weight:700}
@media (max-width:420px){dl.kv{grid-template-columns:1fr} dl.kv dd{margin-bottom:8px}}

/* Tables: scroll inside their own box, never the page */
.table-wrap{position:relative;overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}
.table-wrap:focus-visible{outline-offset:2px}
table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-size:1rem}
caption{text-align:left;font-weight:700;padding:12px 14px;color:var(--navy)}
th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:top}
thead th{background:var(--bg);font-weight:700;color:var(--navy);white-space:nowrap}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
td.num,th.num{text-align:right;white-space:nowrap}
@media (max-width:480px){th,td{padding:8px 10px}}

/* Details / disclosure */
details{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface)}
details+details{margin-top:10px}
summary{cursor:pointer;padding:14px 16px;font-weight:700;min-height:48px;display:flex;align-items:center;gap:10px;list-style:none}
summary::-webkit-details-marker{display:none}
summary::before{content:"";width:10px;height:10px;border-right:2.5px solid var(--navy);border-bottom:2.5px solid var(--navy);transform:rotate(-45deg);flex:none;margin-right:4px}
details[open]>summary::before{transform:rotate(45deg)}
details>.body{padding:0 16px 16px}

/* Dialog */
dialog{border:0;border-radius:var(--radius);padding:0;max-width:min(520px,calc(100vw - 32px));width:100%;box-shadow:0 20px 60px rgba(22,38,64,.35);color:var(--text)}
dialog::backdrop{background:rgba(22,38,64,.55)}
dialog .dlg{padding:24px}
dialog h2{font-size:1.4rem}

/* Chart */
.chart-wrap{position:relative;width:100%}
.chart-wrap .plot svg{display:block;width:100%;height:auto;overflow:visible}
.chart-wrap .plot{width:100%}
.legend{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0 0 8px;padding:0;list-style:none;font-size:1rem}
.legend li{margin:0;display:inline-flex;align-items:center;gap:8px}
.legend svg{flex:none}
.readout{margin-top:10px;border-top:1px solid var(--border);padding-top:10px;font-size:1rem;min-height:3.2em}
.readout b{font-size:1.05rem}

/* Utility */
.center{text-align:center}
.mt-0{margin-top:0}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}
.mb-0{margin-bottom:0}.mb-2{margin-bottom:1rem}
.nowrap{white-space:nowrap}
.divider{border:0;border-top:1px solid var(--border);margin:24px 0}
.pill-code{font-family:var(--mono);font-weight:500;letter-spacing:.04em;background:var(--info-bg);border-radius:6px;padding:2px 8px;white-space:nowrap}
.spinner{width:22px;height:22px;border-radius:50%;border:3px solid var(--border);border-top-color:var(--navy);animation:spin 1s linear infinite;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}
.loading{display:flex;align-items:center;gap:12px;color:var(--text-2)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .spinner{animation:none;border-top-color:var(--border);border-right-color:var(--navy)}
}
@media (forced-colors:active){
  .btn,.badge,.notice,.card,.choice{border:2px solid CanvasText}
  .stepper li[aria-current="step"]{outline:2px solid Highlight}
}
@media print{
  .site-header nav,.site-footer,.no-print{display:none!important}
  body{background:#fff}
}