/* ---------- shared helpers (landing styles live in landing.css) ---------- */
.small { font-size: 13px; }
.list-reset { list-style: none; margin: 0; padding: 0; }
.measure { max-width: 64ch; }
.h2 { font-size: clamp(22px, 3vw, 30px); margin-bottom: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .14em; font-size: 14px; color: var(--text); text-decoration: none; }
.brand:hover { color: var(--text); }
.brand-mark { width: 18px; height: 18px; border: 2px solid var(--sage); border-radius: 50%; position: relative; flex: none; }
.brand-mark::after { content: ''; position: absolute; inset: 3px; border-radius: 50%; background: var(--gold); }
.brand.small { font-size: 12px; }
.navlink { color: var(--text-2); text-decoration: none; padding: 6px 10px; font-weight: 550; font-size: 14px; }
.navlink:hover { color: var(--text); }

/* ---------- knowledge graph ---------- */
.gv { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; min-height: 280px; }
.gv-svg { width: 100%; height: 100%; display: block; cursor: grab; touch-action: none; }
.gv.compact .gv-svg { cursor: default; touch-action: auto; }
.gv-svg.panning { cursor: grabbing; }
.gv-controls { position: absolute; right: 10px; top: 10px; display: grid; gap: 6px; }
.gv-edge { fill: none; stroke: var(--line-strong); }
.gv-edge.hl-up { stroke: var(--sage); stroke-dasharray: 7 5; animation: edge-flow 1.2s linear infinite; }
.gv-edge.hl-down { stroke: var(--gold); stroke-dasharray: 7 5; animation: edge-flow 1.2s linear infinite reverse; }
@keyframes edge-flow { to { stroke-dashoffset: -24; } }
@media (prefers-reduced-motion: reduce) { .gv-edge.hl-up, .gv-edge.hl-down { animation: none; stroke-dasharray: none; } }
.gv-edge.dim { opacity: .25; }
.gv-edge.broken { stroke: var(--gap); stroke-dasharray: 6 5; }
.gv-arrow { fill: var(--line-strong); }
.gv-node { cursor: pointer; --c: var(--line-strong); --bgc: var(--elev); }
.gv-node .gv-base { fill: var(--surface); stroke: none; }
.gv-node .gv-card { fill: var(--bgc); stroke: var(--c); stroke-width: 1.5; }
.gv-node .glyph-bg { fill: var(--c); }
.gv-node .glyph { fill: var(--bg); font: 700 13px var(--font-ui); }
.gv-node .name { fill: var(--text); font: 600 12.5px var(--font-ui); }
.gv-node .lab { fill: var(--text-2); font: 11px var(--font-ui); }
.gv-node .pval { fill: var(--text-2); font: 11px var(--font-mono); }
.gv-node.st-MASTERED { --c: var(--mastered); --bgc: var(--mastered-bg); }
.gv-node.st-NOT_ASSESSED { --c: var(--text-3); --bgc: var(--elev); }
.gv-node.st-LEARNING_IN_PROGRESS, .gv-node.st-READY_FOR_REASSESSMENT { --c: var(--sage); --bgc: var(--elev); }
.gv-node.st-READY_FOR_REASSESSMENT .gv-card { stroke-dasharray: 3 3; }
.gv-node.st-NEEDS_VERIFICATION { --c: var(--verify); --bgc: var(--verify-bg); }
.gv-node.st-SUSPECTED_GAP { --c: var(--suspect); --bgc: var(--suspect-bg); }
.gv-node.st-CONFIRMED_GAP { --c: var(--gap); --bgc: var(--gap-bg); }
.gv-node.st-BLOCKED { --c: var(--blocked); --bgc: var(--blocked-bg); }
.gv-node.st-BLOCKED .gv-card { stroke-dasharray: 5 4; }
.gv-node.target .gv-card { stroke-width: 2.5; }
.gv-node.sel .gv-card { stroke: var(--text); stroke-width: 3; }
.gv-node.dim { opacity: .35; }
.gv-node:focus { outline: none; }
.gv-node:focus-visible .gv-card { stroke: var(--focus); stroke-width: 3.5; }
.gv-node:hover .gv-card { filter: brightness(1.15); }

@media (max-width: 900px) { .hide-sm { display: none; } }

/* ---------- app shell ---------- */
.app { display: grid; grid-template-columns: var(--sidebar) 1fr; min-height: 100vh; }
.sidebar { position: sticky; top: 0; height: 100vh; border-right: 1px solid var(--line); padding: 20px 14px; display: flex; flex-direction: column; gap: 24px; background: var(--bg); }
.navlist { display: grid; gap: 2px; }
.navitem { display: flex; align-items: center; gap: 12px; padding: 9px 12px; border-radius: var(--r-sm); color: var(--text-2); text-decoration: none; font-weight: 550; }
.navitem:hover { background: var(--elev); color: var(--text); }
.navitem.active { background: var(--elev); color: var(--text); box-shadow: inset 2px 0 0 var(--gold); }
.sidebar-foot { margin-top: auto; display: grid; gap: 10px; }
.profile-chip { display: flex; gap: 10px; align-items: center; padding: 10px; border: 1px solid var(--line); border-radius: var(--r); }
.pname { font-weight: 600; word-break: break-word; }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--elev); border: 1px solid var(--line-strong); display: grid; place-items: center; font-weight: 700; color: var(--gold); flex: none; }
.main-col { min-width: 0; }
.mobilebar { display: none; align-items: center; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--bg); z-index: 30; }
.app-main { padding: 28px 32px 64px; max-width: 1180px; margin: 0 auto; display: grid; gap: 20px; }
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.h1 { font-family: var(--font-display); font-weight: 600; font-size: clamp(30px, 3.6vw, 46px); line-height: 1.05; letter-spacing: -0.025em; }
.nav-scrim { display: none; }
.two { grid-template-columns: 1fr 1fr; align-items: start; }
.stats { grid-template-columns: repeat(4, 1fr); }
.mastered-text { color: var(--mastered); }
.verify-text { color: var(--verify); }
.gap-text { color: var(--gap); }
.next { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; border-color: var(--gold); }
.next h2 { margin: 4px 0; font-size: 20px; }
.subj { display: grid; gap: 14px; }
.subj .meter { margin-top: 6px; }

/* ---------- auth ---------- */
.auth { position: relative; min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; isolation: isolate; overflow: hidden; }
.auth-bg { position: absolute; inset: 0; z-index: -1; background: var(--bg); opacity: .8; -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.35) 0%, #000 90%); mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.35) 0%, #000 90%); }
.auth-card { width: 100%; max-width: 460px; display: grid; gap: 16px; }
.auth-card .h2 { font-family: var(--font-display); font-size: 34px; letter-spacing: -0.02em; margin: 0; }
.profiles { display: grid; gap: 8px; }
.profile-btn { width: 100%; display: flex; align-items: center; gap: 12px; text-align: left; padding: 10px 12px; background: var(--bg); border: 1px solid var(--line-strong); border-radius: var(--r-sm); cursor: pointer; }
.profile-btn:hover { border-color: var(--sage); }
.profile-btn > svg { margin-left: auto; color: var(--text-3); }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 50; left: 0; top: 0; width: min(280px, 86vw); transform: translateX(-102%); transition: transform .2s; }
  .nav-open .sidebar { transform: none; box-shadow: var(--shadow); }
  .nav-open .nav-scrim { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, .55); z-index: 40; }
  .mobilebar { display: flex; }
  .app-main { padding: 20px 16px 56px; }
  .two { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
}

/* ---------- workspace ---------- */
.ws { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); grid-template-areas: 'left tour' 'left stage'; grid-template-rows: auto 1fr; gap: 20px; align-items: start; }
.ws-left { grid-area: left; }
.ws-tour { grid-area: tour; }
.ws-tour:empty { display: none; }
.ws-stage { grid-area: stage; }
.selectors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.h3 { font-size: 17px; }
.quote { margin: 0; padding: 10px 12px; background: var(--bg); border: 1px solid var(--line); border-left: 3px solid var(--gold); border-radius: var(--r-sm); font: 13.5px/1.5 var(--font-mono); white-space: pre-wrap; word-break: break-word; }
.stepper { list-style: none; display: flex; gap: 6px; padding: 0; margin: 0; }
.stepper li { flex: 1; padding: 6px 10px; text-align: center; border-bottom: 3px solid var(--line-strong); font-size: 13px; font-weight: 600; color: var(--text-3); }
.stepper li.now { color: var(--text); border-color: var(--gold); }
.stepper li.done { color: var(--mastered); border-color: var(--mastered); }
.demo { border-color: var(--gold); display: grid; gap: 10px; }
.demo .cur { color: var(--text); font-weight: 650; }
.ws .gv { height: 340px; }
details > summary { cursor: pointer; }
@media (max-width: 1000px) { .ws { grid-template-columns: 1fr; grid-template-areas: 'tour' 'left' 'stage'; grid-template-rows: auto; } .selectors { grid-template-columns: 1fr; } }

/* ---------- map ---------- */
.mapgrid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(300px, 1fr); gap: 20px; align-items: start; }
.mapgrid .gv { height: min(620px, 70vh); }
.legend { display: grid; gap: 8px; margin-top: 10px; }
.legend li { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.legend-line { display: inline-block; width: 22px; height: 0; border-top: 3px solid; vertical-align: middle; margin: 0 4px 0 10px; }
.legend-line.up { border-color: var(--sage); }
.legend-line.down { border-color: var(--gold); }
.linkbtn { background: none; border: 0; padding: 0; color: var(--sage); font-weight: 600; cursor: pointer; text-align: left; text-decoration: underline; text-underline-offset: 3px; }
.linkbtn:hover { color: var(--text); }
@media (max-width: 1000px) { .mapgrid { grid-template-columns: 1fr; } }

/* ---------- charts ---------- */
.chart { width: 100%; height: auto; display: block; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .tick { fill: var(--text-3); font: 11px var(--font-mono); }
.chart .thr { stroke: var(--text-3); stroke-dasharray: 4 4; }
.chart .thr.ok, .chart .tick.ok { stroke: var(--mastered); fill: var(--mastered); }
.chart .thr.bad, .chart .tick.bad { stroke: var(--gap); fill: var(--gap); }
.chart .series { fill: none; stroke: var(--sage); stroke-width: 2.5; stroke-linejoin: round; }
.chart .pt { fill: var(--bg); stroke: var(--sage); stroke-width: 2; }
.strip { display: flex; flex-wrap: wrap; gap: 6px; }
.cell { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 6px; font: 700 12px var(--font-mono); border: 1px solid var(--line-strong); }
.cell.mastered { color: var(--mastered); background: var(--mastered-bg); border-color: var(--mastered); }
.cell.verify { color: var(--verify); background: var(--verify-bg); border-color: var(--verify); }
.cell.gap { color: var(--gap); background: var(--gap-bg); border-color: var(--gap); }

/* ---------- explorer ---------- */
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line-strong); background: transparent; color: var(--text-2); cursor: pointer; font-weight: 550; }
.chip:hover { color: var(--text); border-color: var(--text-3); }
.chip[aria-pressed='true'] { background: var(--elev); color: var(--text); border-color: var(--gold); }

/* ---------- ask anything ---------- */
.textarea.prose { font-family: var(--font-ui); font-size: 15px; min-height: 96px; }

.gv-edge.uncertain { stroke-dasharray: 2 5; opacity: .75; }

/* ---------- guided demo ---------- */
.tour { border-color: var(--gold); display: grid; gap: 12px; }
.tour-top { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.tour-count { font: 600 12px var(--font-mono); color: var(--text-2); letter-spacing: .06em; text-transform: uppercase; }
.tour-hide { margin-left: auto; }
.tour-dots { display: flex; gap: 5px; }
.tour-dots span { flex: 1; height: 4px; border-radius: 99px; background: var(--line-strong); }
.tour-dots .done { background: var(--sage); }
.tour-dots .now { background: var(--gold); }
.tour-title { font-family: var(--font-display); font-size: clamp(22px, 2.2vw, 28px); line-height: 1.12; letter-spacing: -0.015em; }
.tour-body { color: var(--text); font-size: 15.5px; }
.tour-why { color: var(--text-2); font-size: 14px; }
.tour-why strong { color: var(--gold); }
.tour-list { margin: 0; padding-left: 20px; display: grid; gap: 4px; color: var(--text-2); font-size: 14.5px; }
.tour-cta { display: grid; gap: 10px; justify-items: start; }
.tour-act { display: grid; gap: 4px; justify-items: start; }
.tour-hint { color: var(--sage); min-height: 1.2em; }
.tour-collapsed { display: flex; justify-content: flex-end; }
.tour-focus { outline: 2px solid var(--gold) !important; outline-offset: 5px; border-radius: var(--r-sm); box-shadow: 0 0 0 9px rgba(199, 164, 103, .12); }
.modes-more { border: 1px solid var(--line); border-radius: var(--r); padding: 10px 14px; }
.modes-more > summary { cursor: pointer; color: var(--text-2); font-size: 14px; font-weight: 550; }
.modes-more[open] > summary { margin-bottom: 10px; }
.plain { background: var(--elev); border-left: 3px solid var(--sage); padding: 10px 12px; border-radius: var(--r-sm); font-size: 15px; }

/* ---------- demo layout: caption, stepper and two labelled panes ---------- */
.demo-page { display: grid; gap: 20px; }
.demo-head { display: grid; gap: 4px; }
.demo-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(9, minmax(0, 1fr)); gap: 6px; }
.demo-steps li { display: grid; gap: 6px; justify-items: center; text-align: center; color: var(--text-3); }
.demo-steps .dot { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-strong); font: 600 12px var(--font-mono); background: var(--surface); transition: background .3s, border-color .3s, color .3s; }
.demo-steps .lab { font-size: 12px; font-weight: 600; letter-spacing: .02em; }
.demo-steps .done { color: var(--text-2); }
.demo-steps .done .dot { background: var(--sage); border-color: var(--sage); color: var(--sage-ink); }
.demo-steps .now { color: var(--text); }
.demo-steps .now .dot { background: var(--gold); border-color: var(--gold); color: #17110a; }
.demo-narration { padding: clamp(20px, 3vw, 32px); gap: 14px; }
.demo-narration .tour-title { font-size: clamp(28px, 3.6vw, 44px); }
.demo-narration .tour-body { font-size: clamp(16px, 1.4vw, 18px); max-width: 62ch; }
.demo-narration .tour-why { font-size: 15px; max-width: 68ch; }
.narr-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(20px, 3vw, 44px); align-items: start; }
.narr-main { display: grid; gap: 10px; align-content: start; }
.narr-side { display: grid; gap: 14px; align-content: start; padding-left: clamp(16px, 2.4vw, 32px); border-left: 1px solid var(--line); }
.demo-narration .tour-cta { justify-items: start; gap: 12px; }
.demo-panes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.pane { display: grid; gap: 14px; align-content: start; }
.pane-head { display: flex; gap: 14px; align-items: center; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.pane-num { width: 34px; height: 34px; flex: none; border-radius: 50%; display: grid; place-items: center; background: var(--elev); border: 1px solid var(--line-strong); font: 700 14px var(--font-mono); color: var(--gold); }
.pane-title { font-family: var(--font-display); font-size: 24px; font-weight: 600; letter-spacing: -0.015em; }
.pane.system .pane-num { color: var(--sage); }
.belief-list { display: grid; gap: 14px; }
.belief-list li { display: grid; gap: 6px; padding-left: 12px; border-left: 2px solid transparent; }
.belief-list li.moved { border-left-color: var(--gold); }
.demo-page .gv { height: 360px; }
@media (max-width: 1000px) {
  .demo-panes { grid-template-columns: 1fr; }
  .demo-steps .lab { display: none; }
  .demo-steps .now .lab { display: block; position: absolute; }
  .narr-grid { grid-template-columns: 1fr; }
  .narr-side { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); padding-top: 14px; }
}

/* Orientation: page intros, first-run card, guide page, map key */
.intro { display: grid; grid-template-columns: auto 1fr; gap: 14px; border-color: var(--line-strong); }
.intro-ic { color: var(--gold); margin-top: 2px; }
.intro-title { font-size: 17px; margin: 0 0 6px; }
.intro-steps { margin: 10px 0 0; padding-left: 20px; display: grid; gap: 4px; color: var(--text-2); font-size: 14px; }
.intro-foot { display: flex; gap: 18px; flex-wrap: wrap; margin: 12px 0 0; font-size: 13px; }
.intro-reopen { margin: 0; }
.intro-reopen .linkbtn { display: inline-flex; gap: 6px; align-items: center; color: var(--text-2); }
.firstrun { border-color: var(--gold); display: grid; gap: 14px; }
.fr-steps { display: grid; gap: 14px; grid-template-columns: repeat(4, 1fr); }
.fr-steps li, .gstep { display: flex; gap: 12px; align-items: flex-start; }
.gnum { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--gold); color: var(--gold); display: grid; place-items: center; font-size: 13px; font-weight: 600; }
.gsteps { display: grid; gap: 18px; margin: 16px 0; }
.gleg li { padding: 4px 0; }
.gterms { display: grid; gap: 14px; margin: 0; grid-template-columns: repeat(2, 1fr); }
.gterm dt { font-weight: 600; margin-bottom: 2px; }
.gterm dd { margin: 0; font-size: 14px; }
.gplain { display: grid; gap: 10px; }
.maphint { padding: 12px 16px; display: grid; gap: 8px; }
.keyrow { display: flex; flex-wrap: wrap; gap: 8px; }
@media (max-width: 900px) { .fr-steps { grid-template-columns: 1fr 1fr; } .gterms { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .fr-steps { grid-template-columns: 1fr; } .intro { grid-template-columns: 1fr; } .intro-ic { display: none; } }