/* IYT Test hi-fi flows: the viewer around the phones, and test UI pieces on top of app.css.
   Look: Merriweather Light display, Carlito caps kickers, one blue accent) + Telegram mini-app chrome. */

/* ---------- page tokens (the viewer, not the app) ---------- */
:root { --page: #eef1f4; --page-ink: #0b1014; --page-muted: #5d6b72; --page-card: #ffffff; --page-line: #dde3e7; --page-acc: #0290d7; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --page: #0b0e11; --page-ink: #eef3f6; --page-muted: #93a3ad; --page-card: #151a1f; --page-line: #252d34; --page-acc: #35b0f2; } }
:root[data-theme="dark"] { --page: #0b0e11; --page-ink: #eef3f6; --page-muted: #93a3ad; --page-card: #151a1f; --page-line: #252d34; --page-acc: #35b0f2; }
html, body { background: var(--page); color: var(--page-ink); }
body { font-family: 'Merriweather', Georgia, serif; margin: 0; }
.k { font: 700 13px 'Carlito', Arial, sans-serif; text-transform: uppercase; letter-spacing: 0.02em; color: var(--page-muted); }

/* top bar */
.vbar { position: sticky; top: 0; z-index: 50; height: 60px; display: flex; align-items: center; gap: 16px; padding: 0 20px; background: var(--page); border-bottom: 1px solid var(--page-line); box-sizing: border-box; }
.vbar .ttl { font: 300 20px 'Merriweather', Georgia, serif; letter-spacing: -0.01em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.vbar .sp { flex: 1; }
.switch { display: inline-flex; gap: 4px; background: var(--page-card); border: 1px solid var(--page-line); border-radius: 40px; padding: 3px; flex: none; }
.switch button { font: 700 12px 'Carlito', Arial, sans-serif; text-transform: uppercase; border: 0; background: transparent; color: var(--page-muted); border-radius: 40px; height: 32px; padding: 0 14px; cursor: pointer; }
.switch button.on { background: var(--page-ink); color: var(--page); }
.vtabs { display: inline-flex; gap: 4px; flex: none; }
.vtabs a { font: 700 12px 'Carlito', Arial, sans-serif; text-transform: uppercase; color: var(--page-muted); text-decoration: none; height: 32px; padding: 0 12px; border-radius: 40px; display: inline-flex; align-items: center; border: 1px solid transparent; }
.vtabs a.on { color: var(--page-ink); background: var(--page-card); border-color: var(--page-line); }
.menu-btn { display: none; border: 1px solid var(--page-line); background: var(--page-card); color: var(--page-ink); border-radius: 40px; height: 38px; padding: 0 14px; font: 700 12px 'Carlito', Arial, sans-serif; text-transform: uppercase; cursor: pointer; }

/* pages mode: index | stage | notes */
.pages { display: grid; grid-template-columns: 270px minmax(0, 1fr) 340px; height: calc(100vh - 60px); }
.index { overflow-y: auto; padding: 16px 12px 32px; border-right: 1px solid var(--page-line); }
.index h4 { margin: 18px 10px 6px; font: 700 12px 'Carlito', Arial, sans-serif; text-transform: uppercase; letter-spacing: 0.03em; color: var(--page-muted); }
.index h4:first-child { margin-top: 4px; }
.index a { display: flex; gap: 10px; align-items: baseline; padding: 7px 10px; border-radius: 10px; color: var(--page-ink); text-decoration: none; font-size: 14px; line-height: 1.3; cursor: pointer; }
.index a span { font: 700 12px 'Carlito', Arial, sans-serif; color: var(--page-muted); width: 24px; flex: none; }
.index a:hover { background: var(--page-card); }
.index a.on { background: var(--page-ink); color: var(--page); }
.index a.on span { color: var(--page); opacity: 0.7; }
.stage { position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; padding: 20px; box-sizing: border-box; }
.stage-box { flex: none; }
.stage-box .scaler { transform-origin: 0 0; }
.notes { overflow-y: auto; padding: 28px 24px; border-left: 1px solid var(--page-line); display: flex; flex-direction: column; gap: 14px; }
.notes h2 { margin: 0; font: 300 30px/1.05 'Merriweather', Georgia, serif; letter-spacing: -0.02em; }
.notes p { margin: 0; font-size: 15px; line-height: 1.6; color: var(--page-muted); }
.notes code, .cap code, .doc code { font-size: 12px; background: var(--page-card); border: 1px solid var(--page-line); border-radius: 6px; padding: 1px 5px; color: var(--page-ink); font-family: ui-monospace, Menlo, monospace; }
.notes .who { display: inline-flex; align-self: flex-start; font: 700 12px 'Carlito', Arial, sans-serif; text-transform: uppercase; border-radius: 8px; padding: 4px 8px; background: var(--page-card); border: 1px solid var(--page-line); }
.notes .who.web { background: var(--page-ink); color: var(--page); border-color: var(--page-ink); }
.pager { display: flex; gap: 8px; margin-top: 8px; }
.pager button { flex: 1; height: 44px; border-radius: 40px; border: 2px solid var(--page-line); background: var(--page-card); color: var(--page-ink); font: 15px 'Merriweather', Georgia, serif; cursor: pointer; }
.pager button.next { background: var(--page-acc); border-color: var(--page-acc); color: #fff; }
.pager button:disabled { opacity: 0.35; cursor: default; }
.counter { font: 700 12px 'Carlito', Arial, sans-serif; text-transform: uppercase; color: var(--page-muted); }
.kbd { font: 12px 'Carlito', Arial, sans-serif; color: var(--page-muted); }

/* overview mode: lanes */
.overview { display: none; }
body.mode-overview .pages { display: none; }
body.mode-overview .overview { display: block; }
.doc { max-width: 1240px; margin: 0 auto; padding: 40px 24px 8px; }
.doc h1 { font-weight: 300; font-size: 44px; letter-spacing: -0.025em; line-height: 1; margin: 12px 0 16px; }
.doc p { font-size: 16px; line-height: 1.55; color: var(--page-muted); max-width: 760px; margin: 0 0 12px; }
.legend { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 24px 0 8px; }
.legend div { background: var(--page-card); border: 1px solid var(--page-line); border-radius: 18px; padding: 16px 18px; font-size: 14px; line-height: 1.5; color: var(--page-muted); }
.legend b { display: block; font: 700 13px 'Carlito', Arial, sans-serif; text-transform: uppercase; color: var(--page-ink); margin-bottom: 4px; }
.flow { padding: 32px 0 8px; }
.flow-head { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.flow-head h2 { font-weight: 300; font-size: 32px; letter-spacing: -0.02em; margin: 6px 0 8px; }
.flow-head p { font-size: 15px; line-height: 1.55; color: var(--page-muted); max-width: 760px; margin: 0; }
.lane { display: flex; gap: 28px; overflow-x: auto; padding: 24px max(24px, calc((100vw - 1240px) / 2 + 24px)) 32px; }
.art { flex: none; width: 390px; display: flex; flex-direction: column; gap: 14px; }
.art.wide { width: 1280px; }
.art .screen, .stage .screen { border-radius: 44px; box-shadow: 0 1px 0 var(--page-line), 0 24px 60px rgba(0, 0, 0, 0.12); height: 844px; }
.art .screen.long, .stage .screen.long { height: auto; min-height: 844px; }
.art .desk, .stage .desk { border-radius: 20px; box-shadow: 0 1px 0 var(--page-line), 0 24px 60px rgba(0, 0, 0, 0.12); }
.cap { font-size: 14px; line-height: 1.5; color: var(--page-muted); padding: 0 8px; }
.cap b { display: block; font: 700 14px 'Carlito', Arial, sans-serif; text-transform: uppercase; color: var(--page-ink); margin-bottom: 2px; }

@media (max-width: 1100px) {
  .pages { grid-template-columns: minmax(0, 1fr) 320px; }
  .index { display: none; position: fixed; top: 60px; left: 0; bottom: 0; width: 290px; background: var(--page); z-index: 40; box-shadow: 0 0 40px rgba(0,0,0,0.2); }
  body.index-open .index { display: block; }
  .menu-btn { display: inline-flex; align-items: center; }
}
@media (max-width: 760px) {
  .vbar { gap: 8px; padding: 0 12px; }
  .vbar .ttl { display: none; }
  .pages { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto auto; height: auto; }
  .stage { padding: 16px; }
  .notes { border-left: 0; border-top: 1px solid var(--page-line); padding: 20px 16px 40px; }
}

/* ---------- phone chrome: iOS status bar + Telegram mini app header + main button ---------- */
.sb { height: 44px; padding: 0 28px; display: flex; align-items: center; justify-content: space-between; font: 600 15px -apple-system, 'Helvetica Neue', Arial, sans-serif; color: var(--ink); flex: none; }
.sb i { display: inline-flex; gap: 5px; align-items: center; }
.tgh { height: 44px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; font: 400 17px -apple-system, 'Helvetica Neue', Arial, sans-serif; color: var(--accent); flex: none; }
.tgh b { font-weight: 600; color: var(--ink); font-size: 16px; }
.tgh .dots { color: var(--ink); }
.tgmain { padding: 10px 16px 30px; background: var(--bg); border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; flex: none; }
.tgmain .b { height: 50px; border-radius: 12px; background: var(--accent); color: var(--on-accent); font: 600 17px -apple-system, 'Helvetica Neue', Arial, sans-serif; display: flex; align-items: center; justify-content: center; gap: 8px; }
.tgmain .b2 { background: var(--band); color: var(--accent); }
.tgmain .b3 { background: var(--band); color: var(--danger); }
.tgmain .b.off { background: var(--band); color: var(--faint); }
.tgmain .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.tgmain .hint { text-align: center; font: 400 12px -apple-system, Arial, sans-serif; color: var(--muted); }

/* ---------- layout helpers ---------- */
.stack { display: flex; flex-direction: column; }
.g4 { gap: 4px; } .g8 { gap: 8px; } .g12 { gap: 12px; } .g16 { gap: 16px; } .g20 { gap: 20px; } .g24 { gap: 24px; }
.sb-between { justify-content: space-between; }
.scroll { flex: 1 1 0; min-height: 0; overflow: hidden; display: flex; flex-direction: column; gap: 22px; padding: 4px 24px 24px; }
.scroll > * { flex-shrink: 0; }
.scroll > .grow { flex: 1 1 0; }
.long .scroll { flex: 1 0 auto; }
.hint { margin: 0; }
.acc { color: var(--accent); }
.right { text-align: right; }
.body-s { font-family: 'Merriweather', Georgia, serif; font-size: 15px; line-height: 1.45; color: var(--ink); margin: 0; }

/* ---------- test UI pieces ---------- */
/* progress: one segment per question (practice), or a thin bar (topic mastery) */
.progress { display: flex; gap: 4px; }
.progress span { flex: 1; height: 4px; border-radius: 2px; background: var(--tag-line); }
.progress span.on { background: var(--ink); }
.progress span.ok { background: var(--accent); }
.progress span.bad { background: var(--danger); }
.progress span.now { background: var(--ink); height: 6px; margin-top: -1px; }
.bar { height: 6px; border-radius: 3px; background: var(--tag-line); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.bar.ink i { background: var(--ink); }

/* level cards on the home screen */
.lvl, .screen a.lvl { display: grid; grid-template-columns: 52px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 16px; border-radius: 24px; border: 2px solid var(--line); color: var(--ink); }
.lvl.on, .screen a.lvl.on { border-color: var(--ink); }
.lvl.soon { opacity: .5; }
.lvl .card-title { font-size: 17px; }
.lvl .card-meta { margin-top: 3px; }
.lvl .chev { color: var(--muted); display: inline-flex; }
/* mastery ring: conic gradient, number inside */
.ring { --v: 62; --sz: 52px; --w: 5px; width: var(--sz); height: var(--sz); border-radius: 50%; flex: none; display: flex; align-items: center; justify-content: center; position: relative; isolation: isolate;
  background: conic-gradient(var(--accent) calc(var(--v) * 1%), var(--tag-line) 0); }
.ring::before { content: ''; position: absolute; inset: var(--w); border-radius: 50%; background: var(--bg); z-index: -1; }
.ring b { font: 700 13px 'Carlito', Arial, sans-serif; color: var(--ink); letter-spacing: -.02em; }
/* large: number and label stacked and centred as one block */
.ring.l { --sz: 140px; --w: 10px; flex-direction: column; gap: 3px; } .ring.l b { font-size: 34px; line-height: 1; }
.ring.l small { font: 700 11px 'Carlito', Arial, sans-serif; line-height: 1; text-transform: uppercase; letter-spacing: .02em; color: var(--muted); }
.ring.bad { background: conic-gradient(var(--danger) calc(var(--v) * 1%), var(--tag-line) 0); }
.ring.ink { background: conic-gradient(var(--ink) calc(var(--v) * 1%), var(--tag-line) 0); }
.band .ring::before { background: var(--band); }

/* topic rows */
.topics { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.topic, .screen a.topic { display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; gap: 4px 14px; align-items: center; padding: 13px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
.topic .ico { grid-column: 1; grid-row: 1 / span 2; width: 36px; height: 36px; border-radius: 50%; background: var(--band); color: var(--ink); display: flex; align-items: center; justify-content: center; }
.topic .card-title { grid-column: 2; grid-row: 1; font-size: 16px; }
.topic .n { grid-column: 3; grid-row: 1 / span 2; font: 700 13px 'Carlito', Arial, sans-serif; color: var(--muted); text-align: right; }
.topic .n b { display: block; font-size: 17px; color: var(--ink); }
.topic .bar { grid-column: 2; grid-row: 2; width: 100%; height: 4px; }
.topic.weak .bar i { background: var(--danger); }
.topic.done .ico { background: var(--sel-bg); color: var(--sel-ink); }

/* question + options */
.q { font-family: 'Merriweather', Georgia, serif; font-weight: 400; font-size: 21px; line-height: 1.3; letter-spacing: -.01em; color: var(--ink); margin: 0; text-wrap: pretty; }
.opts { display: flex; flex-direction: column; gap: 10px; }
.opt { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 12px; align-items: center; padding: 14px 16px; border-radius: 20px; border: 2px solid var(--tag-line); background: var(--bg); font-family: 'Merriweather', Georgia, serif; font-size: 16px; line-height: 1.35; color: var(--ink); }
.opt .l { width: 30px; height: 30px; border-radius: 50%; border: 2px solid var(--tag-line); display: flex; align-items: center; justify-content: center; font: 700 13px 'Carlito', Arial, sans-serif; color: var(--muted); box-sizing: border-box; }
.opt.sel { border-color: var(--ink); } .opt.sel .l { background: var(--sel-bg); border-color: var(--sel-bg); color: var(--sel-ink); }
.opt.ok { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, var(--bg)); } .opt.ok .l { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.opt.bad { border-color: var(--danger); } .opt.bad .l { background: var(--danger); border-color: var(--danger); color: #fff; }
.opt.dim { opacity: .45; }
.opt .l svg { width: 16px; height: 16px; }
/* verdict line under the options */
.verdict { display: flex; align-items: center; gap: 10px; font: 700 15px 'Carlito', Arial, sans-serif; text-transform: uppercase; letter-spacing: .02em; }
.verdict.ok { color: var(--accent); } .verdict.bad { color: var(--danger); }
.verdict .ico { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex: none; }
.verdict.ok .ico { background: var(--accent); color: var(--on-accent); } .verdict.bad .ico { background: var(--danger); color: #fff; }
.why { padding: 18px 20px; display: flex; flex-direction: column; gap: 8px; }
.why .body-s { color: var(--ink); }
.why .ref { display: inline-flex; align-items: center; gap: 6px; }
/* flag / skip row */
.qtools { display: flex; justify-content: space-between; align-items: center; }
.qtools .mini { gap: 8px; }
.mini.on { background: var(--sel-bg); color: var(--sel-ink); border-color: var(--sel-bg); }
/* top strip of a question screen: counter left, topic chip right */
.qhead { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.timer { display: inline-flex; align-items: center; gap: 6px; font: 700 15px 'Carlito', Arial, sans-serif; font-variant-numeric: tabular-nums; color: var(--ink); }
.timer.low { color: var(--danger); }

/* figure in a question (buoy / lights drawings) */
.fig { border-radius: 24px; background: var(--band); padding: 18px; display: flex; align-items: center; justify-content: center; }
.fig svg { display: block; overflow: visible; width: 100%; height: 100%; }
.screen .fig { height: 156px; padding: 8px 12px; }
.fig svg text { font-family: 'Carlito', Arial, sans-serif; }
.fig .sea { fill: none; stroke: var(--faint); stroke-width: 2; stroke-linecap: round; }
.fig .yel { fill: #ffa800; } .fig .blk { fill: var(--ink); } .fig .red { fill: #d40000; } .fig .grn { fill: #1aa39a; } .fig .wht { fill: var(--bg); stroke: var(--ink); stroke-width: 1.5; }
.fig .cone { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linejoin: round; }
.fig.night { background: #0a1016; }
/* buoys and day shapes: the colours are the subject, so the box keeps the day tokens in the night theme (figures.js FIG_DAY) */
.fig.day { --bg: #ffffff; --ink: #000000; --muted: #6d7a7e; --faint: #b8c2c6; --band: #f2f7f9; --line: #eef2f4; --tag-line: #dfe5e8; --accent: #0290d7; --danger: #d40000; background: #f2f7f9; }
.fig .glow { filter: drop-shadow(0 0 6px currentColor); }

/* result screens */
.score { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; padding: 10px 0 0; }
.score .display { font-size: 40px; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.stat { background: var(--band); border-radius: 20px; padding: 14px 12px; display: flex; flex-direction: column; gap: 4px; align-items: center; justify-content: center; text-align: center; }
.stat b { font: 700 22px 'Carlito', Arial, sans-serif; color: var(--ink); letter-spacing: -.02em; }
.stat .meta { font-size: 11px; }
.tbars { display: flex; flex-direction: column; gap: 10px; }
.tbar { display: grid; grid-template-columns: minmax(0, 1fr) 44px; gap: 4px 12px; align-items: center; }
.tbar .card-title { font-size: 14px; font-weight: 400; color: var(--ink); }
.tbar .n { font: 700 13px 'Carlito', Arial, sans-serif; color: var(--muted); text-align: right; }
.tbar .bar { grid-column: 1 / -1; height: 4px; }
.tbar.weak .bar i { background: var(--danger); }
.pass { display: inline-flex; align-items: center; gap: 8px; height: 36px; padding: 0 16px; border-radius: 18px; background: var(--accent); color: var(--on-accent); font: 700 13px 'Carlito', Arial, sans-serif; text-transform: uppercase; letter-spacing: .04em; }
.pass.no { background: var(--band); color: var(--danger); }

/* review cards */
.rev { border: 2px solid var(--line); border-radius: 24px; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.rev .q { font-size: 16px; }
.rev .ans { display: grid; grid-template-columns: 22px minmax(0, 1fr); gap: 8px; align-items: start; font-family: 'Merriweather', Georgia, serif; font-size: 14px; line-height: 1.35; color: var(--ink); }
.rev .ans .l { width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.rev .ans.bad .l { background: var(--danger); color: #fff; } .rev .ans.ok .l { background: var(--accent); color: var(--on-accent); }
.rev .ans.bad { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--faint); }

/* exam overview grid */
.grid40 { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 8px; }
.grid40 span { aspect-ratio: 1; border-radius: 12px; border: 2px solid var(--tag-line); display: flex; align-items: center; justify-content: center; font: 700 13px 'Carlito', Arial, sans-serif; color: var(--muted); box-sizing: border-box; position: relative; }
.grid40 span.a { background: var(--sel-bg); border-color: var(--sel-bg); color: var(--sel-ink); }
.grid40 span.f::after { content: ''; position: absolute; top: 4px; right: 4px; width: 8px; height: 8px; border-radius: 50%; background: #ffa800; }
.grid40 span.now { border-color: var(--accent); color: var(--accent); }
.legend-row { display: flex; flex-wrap: wrap; gap: 6px 16px; }
.legend-row span { display: inline-flex; align-items: center; gap: 6px; font: 13px 'Carlito', Arial, sans-serif; color: var(--muted); }
.legend-row i { width: 14px; height: 14px; border-radius: 4px; border: 2px solid var(--tag-line); box-sizing: border-box; display: inline-block; }
.legend-row i.a { background: var(--sel-bg); border-color: var(--sel-bg); } .legend-row i.f { background: #ffa800; border-color: #ffa800; border-radius: 50%; }

/* activity (progress screen): 7 day columns */
.days { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; align-items: end; height: 84px; }
.days div { display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.days i { display: block; width: 100%; border-radius: 6px; background: var(--accent); min-height: 4px; }
.days i.z { background: var(--tag-line); }
.days span { font: 700 11px 'Carlito', Arial, sans-serif; text-transform: uppercase; color: var(--muted); }
.days .today span { color: var(--ink); }
.streak { display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 14px 0 10px; border-radius: 20px; background: var(--band); font: 700 14px 'Carlito', Arial, sans-serif; color: var(--ink); }
.streak .fire { width: 24px; height: 24px; border-radius: 50%; background: #ffa800; color: #000; display: flex; align-items: center; justify-content: center; }

/* settings rows */
.set { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.set .card-title { font-size: 16px; font-weight: 400; }
.toggle { width: 50px; height: 30px; border-radius: 15px; background: var(--tag-line); position: relative; flex: none; }
.toggle::after { content: ''; position: absolute; top: 3px; left: 3px; width: 24px; height: 24px; border-radius: 50%; background: var(--bg); box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.toggle.on { background: var(--accent); } .toggle.on::after { left: 23px; }

/* bottom nav with the active tab */
.nav a svg { width: 22px; height: 22px; }

/* band for theory notes / next level */
.promo { padding: 18px 20px; display: grid; grid-template-columns: minmax(0, 1fr) 72px; gap: 14px; align-items: center; }
.promo .photo { width: 72px; height: 72px; border-radius: 20px; }
.promo .card-title { font-size: 16px; }
.promo .src { margin-top: 6px; }

/* Telegram chat with inline keyboards */
.tg-kb { display: flex; flex-direction: column; gap: 4px; max-width: 320px; }
.tg-kb .tg-btn { max-width: none; padding: 10px 12px; border-radius: 10px; }
.tg-kb .tg-btn.app { background: var(--accent); color: var(--on-accent); }
.tg-kb.row2 { flex-direction: row; } .tg-kb.row2 .tg-btn { flex: 1; }
.tg-in .tg-q { font-weight: 600; }

/* ---------- website (desk) pieces ---------- */
.desk { gap: 0; padding: 0; }
.d-wrap { width: 1180px; margin: 0 auto; padding: 0 24px; box-sizing: border-box; }
.d-head { display: flex; align-items: center; gap: 28px; min-height: 76px; padding: 12px 0; }
.d-head .logo { width: 28px; height: 28px; }
.d-head nav { display: flex; gap: 22px; font: 700 15px 'Carlito', Arial, sans-serif; color: var(--ink); }
.d-head nav a { color: var(--ink); } .d-head nav a.on { color: var(--accent); }
.d-head .sp { flex: 1; }
.d-hero { padding: 48px 0 24px; display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 56px; align-items: end; }
.d-hero .display { font-size: 60px; line-height: .98; letter-spacing: -.025em; max-width: 16ch; }
.d-lead { font-family: 'Carlito', 'Lato', Arial, sans-serif; font-size: 21px; line-height: 1.35; max-width: 56ch; margin: 0; color: var(--ink); }
.d-pills { display: flex; gap: 12px; flex-wrap: wrap; }
.d-sec { padding: 56px 0 0; display: flex; flex-direction: column; gap: 24px; }
.d-h2 { font-size: 40px; max-width: 24ch; }
.d-grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.d-grid3 { gap: 20px; }
.d-lv { border: 2px solid var(--line); border-radius: 28px; padding: 22px; display: flex; flex-direction: column; gap: 14px; min-height: 230px; }
.d-lv.on { border-color: var(--ink); }
.d-lv.soon { opacity: .55; }
.d-lv .card-title { font-size: 19px; }
.d-lv .facts { margin-top: auto; }
.d-lv .pill { height: 48px; font-size: 17px; align-self: flex-start; }
.d-step { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 16px; }
.d-step .num-ico { width: 44px; height: 44px; font-size: 18px; }
.d-step h3 { margin: 0 0 6px; font: 700 18px 'Carlito', Arial, sans-serif; color: var(--ink); }
.d-step p { margin: 0; font-size: 16px; line-height: 1.45; color: var(--muted); }
.d-foot { margin-top: 64px; border-top: 1px solid var(--line); padding: 24px 0 32px; display: flex; justify-content: space-between; font: 14px 'Carlito', Arial, sans-serif; color: var(--muted); }
.d-two { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 56px; align-items: start; }
.d-box { position: sticky; top: 24px; padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.d-topics .topic { grid-template-columns: 40px minmax(0, 1fr) auto; padding: 16px 0; }
.d-topics .topic .card-title { font-size: 17px; }
.d-q .q { font-size: 28px; line-height: 1.25; max-width: 30ch; }
.d-q .opts { gap: 12px; max-width: 760px; }
.d-q .opt { font-size: 18px; padding: 18px 20px; border-radius: 22px; }
.d-side { display: flex; flex-direction: column; gap: 16px; }
.d-side .topics .topic { grid-template-columns: minmax(0, 1fr) auto; padding: 10px 0; }
.d-side .topics .topic .card-title { grid-column: 1; font-size: 14px; font-weight: 400; }
.d-side .topics .topic .n { grid-column: 2; grid-row: 1; }
.d-side .topics .topic .n { font-size: 12px; }
.d-side .topics .topic.now .card-title { font-weight: 700; }
.d-res { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 56px; align-items: start; }
.d-res .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.d-res .tbars { gap: 14px; }
.d-res .tbar .card-title { font-size: 16px; }
.d-sample { border: 2px solid var(--line); border-radius: 28px; padding: 24px; display: flex; flex-direction: column; gap: 14px; }
.d-sample .q { font-size: 20px; }
.d-sample .opts { gap: 8px; }
.d-sample .opt { font-size: 15px; padding: 10px 14px; border-radius: 16px; }
.d-sample .opt .l { width: 26px; height: 26px; font-size: 12px; }
.d-sample .verdict { font-size: 13px; }