/* SolveTrace — one stylesheet, organised by what it dresses.
   Serious, restrained, typographic. One accent, one radius, borders over
   shadows. No gradients, no glass, no gamification.                         */

/* ---------------------------------------------------------------- tokens - */
:root{
  color-scheme:light;
  --page-bg:#f8f9fb;--surface:#fff;--surface-raised:#fbfcfd;
  --text:#18202b;--text-secondary:#4d5968;--text-muted:#576473;
  --border:#d8dee7;--border-subtle:#e8ecf1;
  --accent:#2457a6;--accent-hover:#1d4789;--accent-soft:#edf3fb;
  --success:#26704c;--success-soft:#edf7f1;
  --warning:#8a5b15;--warning-soft:#fbf5e9;
  --danger:#a23a3a;--danger-soft:#fbefef;
  --radius-sm:4px;--radius:4px;
  --space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;
  --content-width:1040px;
  --focus-ring:0 0 0 3px rgba(36,87,166,.2);
}

/* ------------------------------------------------------------ base reset - */
*{box-sizing:border-box}
html{min-width:320px}
body{margin:0;background:var(--page-bg);color:var(--text);font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:2px}
a:hover{color:var(--accent-hover)}
button,input,textarea,select{font:inherit}
code,.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.skip-link{position:fixed;z-index:100;top:8px;left:8px;transform:translateY(-160%);padding:8px 12px;background:var(--text);color:#fff;border-radius:var(--radius-sm)}
.skip-link:focus{transform:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
details>summary{cursor:pointer}

h1,h2,h3,p{margin-top:0}
h1{margin-bottom:8px;font-size:clamp(24px,3vw,28px);line-height:1.2;letter-spacing:-.025em;font-weight:680}
h2{margin:0;font-size:17px;line-height:1.35;letter-spacing:-.01em;font-weight:650}
h3{margin-bottom:8px;font-size:15px;line-height:1.4;font-weight:650}
p{margin-bottom:12px;overflow-wrap:anywhere}
ul{margin:12px 0;padding-left:22px}
li+li{margin-top:8px}

/* ------------------------------------------------------------- app shell - */
.wrap{width:min(100%,calc(var(--content-width) + 40px));margin-inline:auto;padding-inline:20px}
.top{position:sticky;z-index:20;top:0;border-bottom:1px solid var(--border);background:#fff}
.top .wrap{min-height:58px;display:flex;align-items:center;gap:24px}
.brand{display:inline-flex;align-items:center;gap:9px;color:var(--text);text-decoration:none;font-size:16px;font-weight:700;letter-spacing:-.02em;white-space:nowrap}
.brand-mark{width:22px;height:22px;display:grid;place-items:center;border:1px solid var(--accent);border-radius:var(--radius-sm);color:var(--accent);font:700 13px/1 ui-monospace,SFMono-Regular,Menlo,monospace}
.desktop-nav{display:flex;align-self:stretch;gap:4px;margin-left:auto}
.desktop-nav a{display:inline-flex;align-items:center;padding:0 11px;border-bottom:2px solid transparent;color:var(--text-secondary);text-decoration:none;font-size:14px;font-weight:520}
.desktop-nav a:hover{color:var(--text);background:var(--surface-raised)}
.desktop-nav a.active{color:var(--accent);border-bottom-color:var(--accent)}
.mobile-nav{display:none;margin-left:auto}
.mobile-nav summary{cursor:pointer;list-style:none;padding:7px 10px;border:1px solid var(--border);border-radius:var(--radius);color:var(--text-secondary);font-size:14px;font-weight:600}
.mobile-nav summary::-webkit-details-marker{display:none}
.mobile-nav[open] nav{position:absolute;top:52px;right:16px;width:min(250px,calc(100vw - 32px));display:grid;padding:8px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:none}
.mobile-nav a{padding:10px 12px;border-radius:var(--radius-sm);color:var(--text-secondary);text-decoration:none}
.mobile-nav a.active{color:var(--accent);background:var(--accent-soft);font-weight:650}
.app-main{padding-top:32px;padding-bottom:72px}
.app-footer{display:flex;flex-wrap:wrap;align-items:center;gap:20px;padding-block:20px;border-top:1px solid var(--border);color:var(--text-secondary);font-size:14px}
.app-footer form{margin:0}
.developer-menu{margin-left:auto}
.developer-menu summary{font-size:13px}
.developer-menu nav{display:flex;flex-wrap:wrap;gap:12px;padding-top:12px}

/* ------------------------------------------------- page rhythm and width - */
.page-header{margin-bottom:32px}
.page-header.compact{margin-bottom:24px}
.eyebrow{margin-bottom:8px;color:var(--text-muted);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.sub{max-width:720px;margin:0;color:var(--text-secondary);font-size:14px}
.section{margin-top:32px}
.section[id]{scroll-margin-top:80px}
.section-header{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:12px}
.section-note{margin:0;color:var(--text-muted);font-size:14px}
/* One reading width for every solve/review surface. */
.work-page{max-width:820px}
.narrow{max-width:620px;margin:24px auto}
.header-actions{display:flex;align-items:center;justify-content:space-between;gap:24px}
.header-actions>.btn{flex-shrink:0}
.rule{height:1px;margin:24px 0;border:0;background:var(--border-subtle)}

/* ---------------------------------------------------- surfaces and lists - */
.card,.surface{margin-bottom:12px;padding:20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
.card.tight{padding:14px 16px}
.surface.flush{padding:0;overflow:hidden}
.surface>:last-child,.card>:last-child{margin-bottom:0}
.surface>.empty-state,.card>.empty-state{padding:4px 0;border:0;background:none}
.surface.flush>.empty-state{padding:20px}
.surface.flush>p.meta{padding:12px 16px;margin:0}
.item-row{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:16px;padding:16px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}
.item-row+.item-row{margin-top:8px}
.item-title{margin-bottom:3px;color:var(--text);font-weight:650;overflow-wrap:anywhere}
.item-title a{color:inherit;text-decoration:none}
.item-title a:hover{color:var(--accent)}
.item-meta,.meta{color:var(--text-muted);font-size:14px}
.helper{color:var(--text-secondary);font-size:14px;font-weight:400}
/* A queue is a list of work, not a stack of cards. */
.queue{border-block:1px solid var(--border);background:#fff}
.queue .item-row{border:0;border-bottom:1px solid var(--border-subtle);border-radius:0;margin:0;padding:16px}
.queue .item-row:last-child{border-bottom:0}
.queue p{margin:4px 0 0}
.training-list{list-style:none;margin:0;padding:0}
.training-empty{margin-bottom:20px}
.next-action{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 0;border-block:1px solid var(--border)}
.next-action p{margin:6px 0 0}
.reasoning-signal{padding-block:20px;border-top:1px solid var(--border)}
.repair-line{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px;padding:12px 0;border-top:1px solid var(--border-subtle)}

/* --------------------------------------------------- the problem surface - */
.statement{max-width:780px;white-space:pre-wrap;font-family:Georgia,'Times New Roman',serif;font-size:21px;line-height:1.7;letter-spacing:-.008em;overflow-wrap:anywhere}
.problem-surface{padding:clamp(22px,4vw,38px)}
.problem-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.mode-note{max-width:760px;margin:0;padding-left:12px;border-left:3px solid var(--accent);color:var(--text-secondary);font-size:14px}
.solution{margin:0;padding:16px;overflow-x:auto;white-space:pre-wrap;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:var(--surface-raised);color:var(--text);font:14px/1.65 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.provenance{max-width:780px;margin:20px 0 0;padding-top:12px;border-top:1px solid var(--border-subtle);color:var(--text-muted);font-size:12px}
.provenance a{color:var(--text-muted);text-decoration:underline}
.provenance a:hover{color:var(--accent)}

/* ------------------------------------------------- labels, chips, states - */
/* A chip is one short label: it never breaks mid-word and never shouts. */
.tag,.pill,.status{display:inline-flex;align-items:center;width:fit-content;min-height:24px;padding:2px 7px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-raised);color:var(--text-secondary);font-size:12px;font-weight:650;line-height:1.3;letter-spacing:0;text-transform:none;overflow-wrap:normal;word-break:keep-all;white-space:nowrap}
.pill.correct,.status.success{border-color:#bddacb;background:var(--success-soft);color:var(--success)}
.pill.partial,.status.warning{border-color:#e5d2ae;background:var(--warning-soft);color:var(--warning)}
.pill.incorrect,.status.danger{border-color:#e8c3c3;background:var(--danger-soft);color:var(--danger)}
.pill.type,.status.accent{border-color:#c7d7ed;background:var(--accent-soft);color:var(--accent)}
.status.neutral{color:var(--text-muted)}
.empty-state{padding:22px;border:1px dashed var(--border);border-radius:var(--radius);background:var(--surface-raised)}
.empty-title{margin-bottom:4px;font-weight:650}
.empty-copy{margin:0;color:var(--text-secondary);font-size:14px}
.flash,.notice{position:relative;margin:0 0 16px;padding:12px 14px 12px 38px;border:1px solid;border-radius:var(--radius);font-size:14px}
.flash:before,.notice:before{position:absolute;left:14px;font-weight:800;content:"i"}
.flash.error{border-color:#e8c3c3;background:var(--danger-soft);color:#7f2c2c}
.flash.error:before{content:"!"}
.flash.success{border-color:#bddacb;background:var(--success-soft);color:#205c40}
.flash.success:before{content:"✓"}
.notice{border-color:#e5d2ae;background:var(--warning-soft);color:#68440f}

/* --------------------------------------------------- forms and controls - */
.form-section+.form-section{margin-top:32px;padding-top:24px;border-top:1px solid var(--border-subtle)}
.form-section-header{margin-bottom:16px}
.form-section-header p{margin:3px 0 0;color:var(--text-muted);font-size:13px}
.field{min-width:0}
.field+.field{margin-top:16px}
.field select{max-width:100%}
label,legend{display:block;margin:0 0 6px;color:var(--text);font-size:14px;font-weight:650}
.hint{color:var(--text-muted);font-weight:400}
input[type=text],input[type=email],input[type=password],input[type=number],textarea,select{width:100%;min-height:42px;padding:9px 11px;border:1px solid #cbd3de;border-radius:var(--radius-sm);background:var(--surface);color:var(--text);transition:border-color 120ms ease,box-shadow 120ms ease}
textarea{min-height:96px;resize:vertical}
input::placeholder,textarea::placeholder{color:#929aa5}
input:hover,textarea:hover,select:hover{border-color:#aeb8c5}
input:focus,textarea:focus,select:focus{outline:0;border-color:var(--accent);box-shadow:var(--focus-ring)}
input[type=checkbox],input[type=radio]{width:16px;height:16px;margin:1px 0 0;accent-color:var(--accent)}
.choice{display:flex;align-items:flex-start;gap:9px;margin:0;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);cursor:pointer;font-weight:520}
.choice+.choice{margin-top:8px}
.choice:hover{border-color:#b8c3d0;background:var(--surface-raised)}
.choice:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.choice input{flex-shrink:0;margin-top:3px}
.confidence-control{padding:12px 0}
.confidence-head{display:flex;justify-content:space-between;gap:12px;margin-bottom:8px}
.confidence-value{color:var(--accent);font-weight:700}
input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}
.range-labels{display:flex;justify-content:space-between;color:var(--text-muted);font-size:12px}
.partial-choice{margin-top:16px;border:0;padding:8px 0;background:none;font-size:13px}
.row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.row>.field+.field{margin-top:0}
.row+.field,.row+.row{margin-top:16px}
.actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:24px}
.inline-form{display:inline}
.field-error{margin:6px 0 0;color:var(--danger);font-size:13px}
.form-error{margin:0 0 16px;padding:12px 14px;border:1px solid #e8c3c3;border-radius:var(--radius);background:var(--danger-soft);color:#7f2c2c;font-size:14px}

.btn{min-height:40px;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:8px 14px;border:1px solid var(--accent);border-radius:var(--radius-sm);background:var(--accent);color:#fff;text-decoration:none;font-size:14px;font-weight:650;line-height:1.2;cursor:pointer;transition:background 120ms ease,border-color 120ms ease,transform 80ms ease}
.btn:hover{border-color:var(--accent-hover);background:var(--accent-hover);color:#fff}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:0;box-shadow:var(--focus-ring)}
.btn:disabled{cursor:wait;opacity:.65}
.btn.secondary{border-color:#c7cfd9;background:var(--surface);color:var(--text-secondary)}
.btn.secondary:hover{border-color:#aeb8c5;background:var(--surface-raised);color:var(--text)}
.btn.small{min-height:34px;padding:6px 11px;font-size:14px}
.text-button{border:0;background:none;padding:0;color:var(--accent);text-decoration:underline;cursor:pointer}
/* A quiet in-flow link where a button would compete with the primary action. */
.text-link{color:var(--accent);font-size:14px;font-weight:600;text-decoration:underline}

/* ------------------------------------------------- tables and analytics - */
.table-wrap{width:100%;overflow-x:auto;overscroll-behavior-inline:contain}
.table-wrap:focus-visible{outline-offset:-2px}
table{width:100%;border-collapse:collapse;font-size:14px}
.table-wrap table{min-width:560px}
th{padding:10px 12px;border-bottom:1px solid var(--border);background:var(--surface-raised);color:var(--text-muted);text-align:left;font-size:12px;font-weight:700;letter-spacing:.055em;text-transform:uppercase;white-space:nowrap}
td{padding:11px 12px;border-bottom:1px solid var(--border-subtle);vertical-align:middle}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fafbfd}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.table-link{color:var(--text);font-weight:600;text-decoration:none}
.table-link:hover{color:var(--accent)}
.table-actions{width:1%;white-space:nowrap}
.library-table td:first-child{min-width:200px}

.stat{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:0;margin-bottom:16px}
.stat:last-child{margin-bottom:0}
.stat+.table-wrap{margin-top:20px}
.stat>div{min-width:0;padding:2px 18px;border-left:1px solid var(--border-subtle)}
.stat>div:first-child{padding-left:0;border-left:0}
.stat .v{color:var(--text);font-size:24px;line-height:1.2;font-weight:680;letter-spacing:-.03em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.stat .v.mono{font-size:18px}
.stat .k{margin-top:4px;color:var(--text-muted);font-size:12px;line-height:1.35;font-weight:650;letter-spacing:.05em;text-transform:uppercase}
.metric-summary{margin:0 0 16px;font-size:15px}
.pattern-list{display:grid;gap:12px}
.pattern-item{padding:14px 0;border-bottom:1px solid var(--border-subtle)}
.pattern-item:first-child{padding-top:0}
.pattern-item:last-child{padding-bottom:0;border-bottom:0}
.pattern-item p{margin:5px 0 0;color:var(--text-secondary)}
.progression{white-space:nowrap}
.progression-list{display:flex;flex-direction:column;gap:6px;margin:0;padding:0;list-style:none}
.progression-list li{display:flex;align-items:center;gap:8px;font-size:13px}
.progression-step{min-width:132px;color:var(--text-secondary);font-weight:650}
.level-def{margin:0 0 10px;color:var(--text-secondary);font-size:13px}
.level-def strong{color:var(--text)}

/* -------------------------------------------- diagnosis and review flow - */
.review-steps{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0 0 24px;padding:0 0 12px;list-style:none;border-bottom:1px solid var(--border);color:var(--text-muted);font-size:13px}
.review-steps li+li{margin:0}
.review-steps [aria-current=step]{color:var(--accent);font-weight:650}
.session-context{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:12px 0;margin-bottom:20px;border-block:1px solid var(--border-subtle);font-size:14px}
.diagnosis-block+.diagnosis-block{margin-top:24px;padding-top:16px;border-top:1px solid var(--border-subtle)}
.diagnosis-label{margin-bottom:4px;color:var(--text-muted);font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.diagnosis-value{font-size:19px;font-weight:670;letter-spacing:-.015em}
/* Structured analysis, not a chat transcript: labelled blocks, one column. */
.analysis-surface .diagnosis-block+.diagnosis-block{margin-top:16px;padding-top:16px}
.analysis-surface .diagnosis-block p{margin-bottom:8px}
.analysis-note{border-top:1px solid var(--border-subtle);padding-top:12px;margin-top:16px;font-size:13px;color:var(--text-secondary)}
.correction-panel{margin-top:12px;padding:16px;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:var(--surface-raised)}
.failure-picker{border:0;margin:0 0 8px;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.failure-picker .choice{margin:0;padding:12px;align-items:flex-start}
.failure-picker .helper{display:block;margin-top:4px;font-size:13px;line-height:1.45}
.reasoning-overview .item-row{border:0;border-radius:0;border-bottom:1px solid var(--border-subtle)}
.reasoning-overview .item-row p{margin:0}
/* The one thing to DO after a diagnosis. */
.lead{margin-bottom:12px;font-size:17px;line-height:1.5;font-weight:600}
.intervention-steps{margin:0 0 12px;padding-left:22px;color:var(--text-secondary)}
.intervention-steps li+li{margin-top:6px}

/* ------------------------------------------------ progressive disclosure - */
.secondary-detail{margin-top:16px}
.secondary-detail>summary{cursor:pointer;padding:10px 0;color:var(--accent);font-size:14px;font-weight:550}
.secondary-detail[open]>summary{margin-bottom:8px}
.secondary-detail>.section{margin-top:16px}
.evidence-detail{padding:0 16px;border-top:1px solid var(--border-subtle);margin:0}
.evidence-detail .table-wrap{margin-bottom:16px}
.reference-detail .solution{margin-top:12px}
.rationale-detail{margin:0 0 20px}
.detail-body{padding-block:4px 12px}
.profile-index{display:flex;flex-wrap:wrap;gap:16px;border-block:1px solid var(--border);padding:12px 0;font-size:14px}

/* --------------------------------------------------- library and filters - */
.filter-bar{display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px;padding:14px 16px}
.filter-bar .field{flex:1 1 150px;margin-top:0}
.filter-bar .field+.field{margin-top:0}
.filter-bar select{min-height:34px;padding:5px 9px;font-size:13px}
.filter-bar label{font-size:12px;color:var(--text-muted)}
.filter-actions{display:flex;gap:8px}

/* --------------------------------------------------- feedback and intro - */
.feedback{max-width:680px;border-top:1px solid var(--border);padding-top:24px}
.feedback h2{margin-bottom:12px}
.feedback fieldset{padding:0;margin:0 0 16px;border:0}
.feedback .actions{margin-top:12px}
.feedback-options{display:flex;flex-wrap:wrap;gap:8px}
.feedback-options .choice{margin:0;flex:1 1 120px}
.onboarding-steps{padding-left:26px}
.onboarding-steps li{padding:12px 0 12px 8px;border-bottom:1px solid var(--border)}
.onboarding-steps p{margin:8px 0 0;color:var(--text-secondary)}

/* -------------------------------------------------------------- loading - */
.loading-state{display:flex;align-items:flex-start;gap:12px;margin-top:16px;padding:14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-raised)}
.loading-state[hidden]{display:none}
.loading-spinner{width:17px;height:17px;flex:0 0 auto;margin-top:2px;border:2px solid #cbd5e2;border-top-color:var(--accent);border-radius:50%;animation:spin .85s linear infinite}
.loading-title{margin:0;font-weight:650}
.loading-detail{margin:2px 0 0;color:var(--text-muted);font-size:13px}
@keyframes spin{to{transform:rotate(360deg)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important}}

/* ----------------------------------------------------------- responsive - */
@media(max-width:820px){
  .desktop-nav{display:none}
  .mobile-nav{display:block}
  .stat{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:16px}
  .stat>div:nth-child(odd){padding-left:0;border-left:0}
  .section{margin-top:24px}
}
@media(max-width:600px){
  .wrap{padding-inline:16px}
  .top .wrap{min-height:54px}
  .app-main{padding-top:24px;padding-bottom:48px}
  .app-footer{gap:12px 20px}
  .page-header{margin-bottom:24px}
  .header-actions{align-items:flex-start;flex-direction:column;gap:16px}
  .narrow{margin-top:0}
  .row{grid-template-columns:1fr}
  .card,.surface{padding:16px}
  .surface.flush{padding:0}
  .problem-surface{padding:20px 16px}
  .statement{font-size:20px;line-height:1.65}
  .item-row{grid-template-columns:1fr;gap:12px;padding:14px}
  .item-row .btn{width:100%}
  .next-action{align-items:flex-start;flex-direction:column}
  .next-action .btn{width:100%}
  .actions .btn{flex:1 1 auto}
  .actions .meta,.actions .helper{flex-basis:100%}
  .stat{row-gap:20px}
  .stat>div{padding-inline:12px}
  .stat .v{font-size:21px}
  /* Never let a table push the page itself sideways. */
  .table-wrap{margin-inline:0;width:100%}
  .surface.flush .table-wrap{width:100%;margin-inline:0}
  th,td{padding-inline:10px}
  .profile-index{gap:10px 16px}
  .failure-picker{grid-template-columns:1fr}
  .review-steps{gap:8px 12px;font-size:12px}
  /* 16px stops iOS Safari zooming the page on focus. */
  input[type=text],input[type=email],input[type=password],input[type=number],textarea,select{font-size:16px}
  .btn.small{min-height:40px}
  .progression-list li{flex-wrap:wrap}
  .progression-step{min-width:112px}
  .developer-menu{margin-left:0}
}

/* ---------------------------------------------------------- parent view - */
/* Restrained on purpose. A parent needs a few facts in a readable order, not
   a second analytics product. No scores, no comparisons, no rankings.       */
.focus-area+.focus-area{margin-top:20px;padding-top:20px;border-top:1px solid var(--border-subtle)}
.focus-head{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:8px 12px;margin-bottom:8px}
.focus-head h3{margin:0;font-size:16px}
.focus-area p{margin-bottom:8px}
.focus-area p:last-child{margin-bottom:0}
.statement-code{margin:0 0 4px;font-size:26px;letter-spacing:.14em}
.statement-code .mono,.statement-code strong{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:700}
@media(max-width:600px){.statement-code{font-size:22px;letter-spacing:.1em}}
.evidence-list{margin:0;display:grid;gap:0}
.evidence-row{display:grid;grid-template-columns:150px minmax(0,180px) minmax(0,1fr);gap:4px 20px;align-items:baseline;padding:14px 0;border-top:1px solid var(--border-subtle)}
.evidence-row:first-child{padding-top:0;border-top:0}
.evidence-row:last-child{padding-bottom:0}
.evidence-row dt{font-weight:650}
.evidence-row dd{margin:0}
.evidence-meaning{color:var(--text-muted);font-size:14px}
.evidence-row.is-empty dt{color:var(--text-secondary)}
@media(max-width:700px){
 .evidence-row{grid-template-columns:1fr;gap:2px;padding:14px 0}
 .evidence-meaning{margin-top:4px}
}
.evidence-list+p{margin-top:18px;padding-top:14px;border-top:1px solid var(--border-subtle)}

/* Commercial beta: shared paper, ink and evidence system. */
:root{--page-bg:#f6f5f0;--surface:#fffefa;--surface-raised:#f3f3ed;--text:#202d2b;--text-secondary:#485b57;--text-muted:#596961;--border:#d2d9cf;--border-subtle:#e5e8df;--accent:#176452;--accent-hover:#104b3d;--accent-soft:#e9f1eb;--content-width:1120px;--focus-ring:0 0 0 3px #17645233}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
h1{font-size:clamp(27px,3vw,36px);font-weight:650;letter-spacing:-.035em}
h2{font-size:19px} .sub{font-size:15px;line-height:1.65}
.top{background:var(--surface)}.top .wrap{min-height:72px}.brand{font-size:19px;gap:10px}.brand-mark{width:29px;height:29px;border:0;border-radius:0;background:var(--accent);color:#fff;font:23px/1 Georgia,serif}.beta-label{align-self:center;color:var(--text-muted);font:10px/1.5 ui-monospace,monospace;letter-spacing:.06em;text-transform:uppercase;border:1px solid var(--border);padding:1px 5px;margin-left:1px}
.app-main{padding-top:44px}.page-header{margin-bottom:30px}.eyebrow,.diagnosis-label{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;letter-spacing:.09em}.eyebrow{color:var(--accent)}
.btn{min-height:44px;padding:11px 17px}.btn.small{min-height:40px}.desktop-nav a.active{background:var(--accent-soft)}
.surface,.card{background:var(--surface)}.queue{border:1px solid var(--border);border-radius:4px;background:var(--surface)}.queue .item-row{padding:21px 23px;background:var(--surface)}.queue .item-row:hover{background:var(--surface-raised)}
.next-action{padding:25px 28px;background:var(--accent-soft);border:1px solid #b7cfc1;border-left:4px solid var(--accent);border-radius:4px}.next-action h2{font-size:23px}.reasoning-signal{padding:24px;background:var(--surface);border:1px solid var(--border)}
.empty-state{padding:28px;border-style:solid;background:var(--accent-soft)}.empty-state h2{margin-bottom:8px}.empty-copy{max-width:620px;font-size:15px}
.review-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;padding:0;border:1px solid var(--border);border-radius:4px;overflow:hidden;background:var(--surface)}.review-steps li{padding:13px 14px;margin:0;border-right:1px solid var(--border)}.review-steps li:last-child{border:0}.review-steps [aria-current=step]{background:var(--accent-soft);box-shadow:inset 0 -3px var(--accent)}
.analysis-surface{padding:28px;border-top:3px solid var(--accent)}.analysis-surface .diagnosis-value{font:34px/1.2 Georgia,serif;margin:9px 0}.analysis-surface .diagnosis-block{max-width:660px}.analysis-surface .diagnosis-block+.diagnosis-block{padding-top:21px;margin-top:21px}.analysis-note{line-height:1.6}
.progression-list{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0}.progression-list li{display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:13px 9px;border-top:2px solid var(--border);margin:0}.progression-step{min-width:0;font-size:12px}.progression-list .status{white-space:normal}.profile-index{background:var(--surface);padding:12px 16px;border:1px solid var(--border);border-radius:4px}.profile-index a{text-decoration:none}.secondary-detail>summary{padding:14px 0}.evidence-detail>summary{padding:14px 0}.secondary-detail>summary:hover{color:var(--accent-hover)}
.problem-surface{border-top:3px solid var(--accent)}.problem-meta .tag{background:none;border:0;padding:0;margin-right:10px;text-transform:capitalize;font-weight:400}.statement{font-size:23px;line-height:1.7}
.evidence-row{padding:20px 0}.evidence-result strong{font-size:22px;display:block;font-variant-numeric:tabular-nums;color:var(--accent)}.focus-area{border-left:3px solid var(--accent);padding-left:18px}.focus-head h3{font-size:21px}.focus-area+.focus-area{padding-left:18px}.report-page .page-header{border-bottom:2px solid var(--accent);padding-bottom:24px}.report-page h1{font:44px/1.15 Georgia,serif}.report-page .section>.card{border:0;border-left:2px solid var(--border);padding:18px 24px}.report-page .section h2{font-size:21px}.report-page .card ul{padding-left:20px;margin-top:0}.parent-page #focus{margin-top:0}
.public-page .app-main{padding-top:0;padding-bottom:0}.public-nav a{padding-inline:12px;font-size:13px}.public-nav .nav-cta{background:var(--accent);color:#fff;align-self:center;min-height:38px;border-radius:3px;margin-left:8px;padding:9px 13px}.public-nav .nav-cta:hover{background:var(--accent-hover);color:white}
.marketing-hero{display:grid;grid-template-columns:1.03fr 1fr;gap:70px;align-items:center;padding:76px 0 80px}.hero-copy h1,.editorial-hero h1{font-family:Georgia,'Times New Roman',serif;font-size:clamp(40px,4.5vw,59px);font-weight:400;letter-spacing:-.055em;line-height:1.1;margin:22px 0}.hero-copy h1 em,.editorial-hero h1 em{font-weight:400;color:var(--accent);font-style:italic}.hero-description{max-width:500px;color:var(--text-secondary);font-size:17px;line-height:1.75}.hero-copy .actions{gap:22px;margin-top:28px}.hero-note{font-size:12px;color:var(--text-muted);margin:19px 0 0;line-height:1.65}
.product-demo,.workspace-preview,.parent-preview{background:var(--surface);border:1px solid #bfcbbf;border-radius:5px;overflow:hidden;box-shadow:10px 10px 0 #e7eae0}.demo-toolbar{display:flex;justify-content:space-between;gap:12px;background:#eef1e9;padding:13px 20px;border-bottom:1px solid var(--border);font:10px/1.5 ui-monospace,monospace;letter-spacing:.045em;color:var(--text-secondary)}.demo-content{padding:24px}.demo-problem{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:18px}.demo-problem .meta{font-size:12px}.demo-content h2{font:27px/1.25 Georgia,serif;letter-spacing:-.035em;margin-bottom:21px}.demo-student{border-left:2px solid var(--border);padding-left:14px;margin-bottom:20px}.demo-student p{font-size:14px;line-height:1.55;margin:5px 0}.demo-diagnosis{background:var(--accent-soft);padding:19px;border-left:3px solid var(--accent)}.demo-diagnosis h3{font-size:23px;font-weight:550;margin:5px 0 8px;color:var(--accent)}.demo-diagnosis p{font-size:14px;line-height:1.55}.demo-rule{display:block;border-top:1px solid #c9d9cc;padding-top:12px;font-size:12px;line-height:1.6}.demo-evidence{display:grid;grid-template-columns:1fr 1fr 1.2fr;margin-top:22px}.demo-evidence>div{border-top:2px solid var(--accent);padding:10px 7px 5px 0}.demo-evidence>div+div{padding-left:12px;border-left:1px solid var(--border-subtle)}.demo-evidence span{display:block;font-size:11px;color:var(--text-secondary)}.demo-evidence strong{font-size:12px;color:var(--accent)}.demo-evidence .pending{border-top-color:#a88749}.demo-evidence .pending strong{color:#795c2c}.demo-caption{font-size:11px;margin:13px 0 0;color:var(--text-muted)}
.marketing-section{padding:66px 0;border-top:1px solid var(--border)}.section-intro{max-width:640px;margin-bottom:35px}.section-intro h2,.audience-grid h2,.closing-cta h2{font:36px/1.2 Georgia,serif;letter-spacing:-.035em;margin:14px 0 18px}.section-intro p,.audience-grid p{font-size:16px;line-height:1.7;color:var(--text-secondary);max-width:570px}.contrast-section{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.contrast-section .section-intro{margin:0}.workflow-comparison>div{padding:22px 25px;border-left:2px solid var(--border)}.workflow-comparison p{font-size:17px;margin:8px 0 0}.workflow-comparison .complete-loop{background:var(--accent-soft);border-left-color:var(--accent);margin-top:12px;color:var(--accent)}
.transfer-track{list-style:none;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding:0;margin:40px 0 24px;gap:0}.transfer-track li{margin:0;border-top:2px solid var(--accent);padding:20px 19px 0 0;position:relative}.transfer-track li:before{content:'';width:8px;height:8px;position:absolute;top:-5px;left:0;background:var(--accent)}.track-number{font:11px/1 ui-monospace,monospace;color:var(--accent)}.transfer-track h3{margin:14px 0 8px;font-size:16px}.transfer-track p{color:var(--text-secondary);font-size:13px;line-height:1.65;max-width:175px}.track-note{font-size:12px}
.taxonomy-section{display:grid;grid-template-columns:.85fr 1.15fr;gap:65px}.taxonomy-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.taxonomy-grid article{border-top:1px solid var(--border);padding-top:18px}.taxonomy-grid span{font:11px/1.5 ui-monospace,monospace;color:var(--accent);text-transform:uppercase}.taxonomy-grid h3{font:21px/1.3 Georgia,serif;margin:13px 0 10px}.taxonomy-grid p{font-size:13px;color:var(--text-secondary)}.audience-grid{display:grid;grid-template-columns:1fr 1fr;gap:65px}.audience-grid article+article{border-left:1px solid var(--border);padding-left:50px}.closing-cta{display:flex;justify-content:space-between;align-items:center;gap:32px;padding:40px;margin:15px 0 64px;background:var(--accent-soft);border:1px solid #bfd0c2}.closing-cta h2{margin:8px 0 12px;font-size:33px}.closing-cta p{color:var(--text-secondary);font-size:14px;margin:0}.closing-cta .btn{flex-shrink:0}
.public-footer{border-top:1px solid var(--border);display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px;padding-block:36px}.public-footer p{font-size:13px;color:var(--text-muted);margin-top:15px}.public-footer nav{display:flex;flex-direction:column;align-items:flex-start;gap:10px;font-size:13px}.public-footer nav a{color:var(--text-secondary);text-decoration:none}.public-footer nav a:hover{text-decoration:underline}.public-footer .footer-note{grid-column:1/-1;font-size:11px;margin:0;padding-top:22px;border-top:1px solid var(--border-subtle)}
.editorial-hero{padding:64px 0 50px;max-width:780px}.editorial-hero h1{font-size:55px}.editorial-hero>p{font-size:18px;line-height:1.7;max-width:650px;color:var(--text-secondary)}.method-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:70px;border-top:1px solid var(--border);padding-top:35px}.method-steps{list-style:none;counter-reset:method;padding:0;margin:0}.method-steps li{counter-increment:method;position:relative;padding:0 0 26px 46px;margin-bottom:26px;border-bottom:1px solid var(--border)}.method-steps li:before{content:counter(method,decimal-leading-zero);position:absolute;left:0;top:1px;font:13px/1.6 ui-monospace,monospace;color:var(--accent)}.method-steps h2{font-size:20px;margin-bottom:12px}.method-steps p{font-size:15px;color:var(--text-secondary);line-height:1.75;margin:0}.method-aside{align-self:start;position:sticky;top:104px}.method-aside>p{font-size:12px;margin:25px 5px}.three-principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px}.three-principles h2{font:26px/1.25 Georgia,serif;margin:14px 0}.three-principles p{font-size:15px;line-height:1.75;color:var(--text-secondary)}.preview-focus{padding:28px;background:var(--accent-soft)}.preview-focus h2{font:29px/1.25 Georgia,serif}.preview-task{padding:24px 28px;border-top:1px solid var(--border)}.preview-task h3{margin:14px 0 8px;font-size:17px}.preview-task p{font-size:14px;margin:0;color:var(--text-secondary)}.parent-preview h2{font-size:32px}.parent-preview p{font-size:14px;color:var(--text-secondary)}.parent-demo-evidence{margin:22px 0}.parent-demo-evidence>div{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--border)}.parent-demo-evidence dt{font-size:13px;font-weight:600}.parent-demo-evidence dd{font-size:12px;color:var(--accent);margin:0;text-align:right}.demo-next{background:var(--accent-soft);padding:16px}.demo-next p{margin:6px 0 0}.linking-guide{padding:28px;border:1px solid var(--border);background:var(--surface)}.linking-guide li{font-size:15px;padding:4px 0}.linking-guide .meta{font-size:13px;margin:22px 0 0}.principle-list{max-width:880px}.principle-list article{display:grid;grid-template-columns:60px 1fr;gap:20px;border-top:1px solid var(--border);padding:28px 0}.principle-list article>span{font:14px/1.6 ui-monospace,monospace;color:var(--accent)}.principle-list h2{font-size:23px;margin-bottom:12px}.principle-list p{color:var(--text-secondary);line-height:1.75}.taxonomy-definitions{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}.taxonomy-definitions>div{padding:22px 0;border-top:1px solid var(--border)}.taxonomy-definitions dt{font-size:18px;font-weight:600;margin-bottom:8px}.taxonomy-definitions dd{margin:0;color:var(--text-secondary);font-size:14px;line-height:1.7}.method-limits{padding:30px;background:var(--surface);border:1px solid var(--border);margin-bottom:48px;max-width:880px}.method-limits h2{margin-bottom:16px}.method-limits p{color:var(--text-secondary);font-size:15px;line-height:1.7}.faq-list{max-width:840px;margin-bottom:60px}.faq-list details{border-top:1px solid var(--border);scroll-margin-top:90px}.faq-list details:last-child{border-bottom:1px solid var(--border)}.faq-list summary{font-size:18px;font-weight:550;padding:23px 0;list-style:none;display:flex;justify-content:space-between;gap:20px}.faq-list summary:after{content:'+';font:23px/1 Georgia,serif;color:var(--accent)}.faq-list details[open] summary:after{content:'−'}.faq-list summary::-webkit-details-marker{display:none}.faq-list p{max-width:750px;padding-right:30px;font-size:15px;line-height:1.75;color:var(--text-secondary);margin-bottom:22px}
.auth-layout{display:grid;grid-template-columns:.9fr 1fr;gap:80px;max-width:1020px;margin:12px auto 20px;align-items:start}.auth-story{padding-top:24px}.auth-story h1{font:43px/1.14 Georgia,serif;letter-spacing:-.045em;margin:18px 0}.auth-story .sub{font-size:16px}.auth-story .mini-loop{border-top:1px solid var(--border);margin-top:30px;padding-top:22px;color:var(--accent);font:13px/2 ui-monospace,monospace}.auth-form h2{font-size:24px;margin-bottom:22px}.auth-form .surface{padding:26px}.auth-form .actions .btn{flex:1 1 100%}.auth-form .actions{gap:15px}.auth-form .helper{font-size:12px}.auth-form .field{margin-top:16px}.auth-form .failure-picker{grid-template-columns:1fr 1fr}.auth-form .failure-picker .choice{padding:11px}.auth-form .failure-picker .helper{font-size:12px}.onboarding-panel{max-width:800px;margin:auto}.onboarding-panel h1{font:42px/1.15 Georgia,serif;margin:16px 0}.onboarding-panel .onboarding-steps{counter-reset:intro;list-style:none;padding:0;margin:28px 0}.onboarding-panel .onboarding-steps li{padding:21px 20px 21px 66px;position:relative;background:var(--surface);margin:0;border:1px solid var(--border);border-bottom:0}.onboarding-panel .onboarding-steps li:last-child{border-bottom:1px solid var(--border)}.onboarding-panel .onboarding-steps li:before{counter-increment:intro;content:counter(intro,decimal-leading-zero);position:absolute;left:22px;top:24px;color:var(--accent);font:13px/1.5 ui-monospace,monospace}.onboarding-panel .onboarding-steps p{font-size:15px}.session-options{margin-top:20px}.session-options .row{margin:15px 0}.session-options .helper{font-size:13px}
@media(max-width:1050px){.marketing-hero{gap:34px}.hero-copy h1{font-size:46px}.public-nav a{padding-inline:8px;font-size:12px}.contrast-section,.taxonomy-section,.method-layout{gap:35px}.auth-layout{gap:40px}.beta-label{display:none}}
@media(max-width:820px){.top .wrap{min-height:62px}.mobile-nav[open] nav{top:58px}.marketing-hero{grid-template-columns:1fr;padding:42px 0 55px;gap:38px}.hero-copy{max-width:620px}.hero-copy h1{font-size:51px}.product-demo,.workspace-preview,.parent-preview{max-width:600px;width:100%}.marketing-section{padding:44px 0}.contrast-section,.taxonomy-section{grid-template-columns:1fr;gap:25px}.taxonomy-grid{gap:20px}.method-layout{grid-template-columns:1fr}.method-aside{position:static}.transfer-track{grid-template-columns:repeat(5,minmax(0,1fr))}.transfer-track h3{font-size:14px}.three-principles{gap:24px}.three-principles h2{font-size:23px}.closing-cta{padding:28px;flex-direction:column;align-items:flex-start}.auth-layout{gap:30px}.auth-story h1{font-size:35px}.auth-form .surface{padding:20px}.auth-form .failure-picker{grid-template-columns:1fr}.progression-list{grid-template-columns:1fr}.progression-list li{flex-direction:row;justify-content:space-between;border-top:1px solid var(--border);padding:12px 0}.progression-list .status{max-width:62%}}
@media(max-width:600px){.app-main{padding-top:28px}.marketing-hero{padding-top:33px}.hero-copy h1,.editorial-hero h1{font-size:41px;line-height:1.14;margin:18px 0}.hero-description{font-size:16px;line-height:1.7}.hero-copy .actions{align-items:flex-start;gap:18px}.hero-copy .actions .btn{flex:none;width:100%}.hero-note{font-size:12px}.demo-toolbar{padding:12px 16px;font-size:9px}.demo-content{padding:20px 16px}.demo-content h2{font-size:26px}.product-demo,.workspace-preview,.parent-preview{box-shadow:5px 5px 0 #e7eae0;width:calc(100% - 5px)}.demo-evidence{grid-template-columns:1fr 1fr 1.2fr}.demo-evidence>div+div{padding-left:8px}.demo-evidence strong{font-size:11px}.section-intro h2,.audience-grid h2{font-size:31px}.section-intro p{font-size:15px}.transfer-track{grid-template-columns:1fr;margin-top:25px}.transfer-track li{padding:0 0 22px 25px;border-top:0;border-left:2px solid var(--accent)}.transfer-track li:before{top:0;left:-5px}.transfer-track li:last-child{border-left-color:transparent;padding-bottom:0}.track-number{float:right;margin-top:3px}.transfer-track h3{margin:0 0 5px;font-size:17px}.transfer-track p{max-width:none;font-size:14px;margin:0}.taxonomy-grid{grid-template-columns:1fr 1fr;gap:20px 16px}.taxonomy-grid h3{font-size:20px}.audience-grid{grid-template-columns:1fr;gap:32px}.audience-grid article+article{border:0;border-top:1px solid var(--border);padding:30px 0 0}.closing-cta{margin-bottom:40px;padding:25px 20px}.closing-cta h2{font-size:29px}.closing-cta .btn{width:100%}.public-footer{grid-template-columns:1fr 1fr;gap:25px;padding-block:28px}.public-footer>div{grid-column:1/-1}.public-footer>div p{margin-bottom:0}.public-footer .footer-note{line-height:1.7}.editorial-hero{padding:38px 0 26px}.editorial-hero>p{font-size:16px}.method-steps li{padding-left:36px}.method-steps h2{font-size:19px}.three-principles{grid-template-columns:1fr;gap:20px}.three-principles article+article{border-top:1px solid var(--border);padding-top:22px}.principle-list article{grid-template-columns:24px 1fr;gap:15px}.principle-list h2{font-size:21px}.taxonomy-definitions{grid-template-columns:1fr}.faq-list summary{font-size:16px;padding:20px 0}.faq-list p{padding-right:0}.auth-layout{grid-template-columns:1fr;gap:26px;margin:0}.auth-story{padding-top:0}.auth-story h1{font-size:35px;margin:12px 0}.auth-story .mini-loop{display:none}.auth-form .surface{padding:20px 16px}.auth-form .failure-picker{grid-template-columns:1fr 1fr}.auth-form .failure-picker .helper{display:none}.auth-form .actions>a{font-size:14px}.review-steps li{padding:12px 8px;font-size:11px}.next-action{padding:20px}.queue .item-row{padding:18px}.statement{font-size:21px}.onboarding-panel h1{font-size:35px}.onboarding-panel .onboarding-steps li{padding-left:50px}.onboarding-panel .onboarding-steps li:before{left:16px}.onboarding-panel .actions .btn{flex-basis:100%}}
@media print{.top,.app-footer,.public-footer,.actions,.profile-index,.skip-link{display:none}body{background:white;font-size:11pt}.app-main{padding:0;width:100%;max-width:none}.card,.surface{break-inside:avoid}.report-page .section{margin-top:20px}a{color:inherit;text-decoration:none}}
.auth-form .row>.field{margin-top:0}.marketing-hero{padding-top:54px;padding-bottom:62px}
@media(max-width:600px){.marketing-hero{padding-top:32px;padding-bottom:42px}}

/* History remains readable without horizontal panning on a phone. */
@media(max-width:600px){
 .table-wrap .attempt-history,.attempt-history tbody{display:block;width:100%;min-width:0}
 .attempt-history thead{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip-path:inset(50%)}
 .attempt-history tr{display:block;padding:16px;border-bottom:1px solid var(--border)}
 .attempt-history tr:last-child{border-bottom:0}
 .attempt-history td{display:flex;justify-content:space-between;align-items:baseline;gap:16px;padding:4px 0;border:0;text-align:right;white-space:normal}
 .attempt-history td::before{content:attr(data-label);color:var(--text-muted);font-size:12px;text-align:left;flex-shrink:0}
 .attempt-history td:first-child{display:block;text-align:left;padding:0 0 9px;font-size:15px}
 .attempt-history td:first-child::before{display:none}
 .attempt-history td:first-child .pill{margin-left:5px}
}