/* Fieldline R5 — "premium workbench": white paper on a cool canvas, ink text, cobalt for action
   only, amber for real errors only. Errors are never shown by colour alone (labels, strike, underline).
   One elevated surface: the source sheet. System fonts only (no external requests). */
:root {
  --canvas: #F5F7FB;
  --paper: #FFFFFF;
  --ink: #122032;
  --muted: #4B5A6E;
  --faint: #5F6D82;
  --line: #DCE3EC;
  --line-strong: #B9C4D3;
  --cobalt: #315BEA;
  --cobalt-strong: #2446C2;
  --cobalt-soft: #EAF0FE;
  --amber-ink: #8A4B00;
  --amber-line: #D98A1C;
  --amber-soft: #FFF4E0;
  --ok-ink: #1D6B45;
  --ok-soft: #E7F5EE;
  --r-card: 16px;
  --r-ctl: 10px;
  --font: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", "Malgun Gothic", "Apple SD Gothic Neo", "Microsoft YaHei", "PingFang SC", "Noto Sans CJK KR", "Noto Sans CJK JP", "Noto Sans CJK SC", sans-serif;
  --mono: "Cascadia Mono", "Consolas", "SFMono-Regular", "Menlo", "DejaVu Sans Mono", "Liberation Mono", monospace;
  --vvh: 100dvh;
  --vvtop: 0px;
  --kb: 0px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--canvas); color: var(--ink); font-family: var(--font); font-size: 1rem; line-height: 1.55; }
#app { max-width: 1160px; margin: 0 auto; padding: 0 max(16px, env(safe-area-inset-right)) 40px max(16px, env(safe-area-inset-left)); }
h1, h2, h3 { line-height: 1.25; margin: 0; }
/* Korean: break between words, not inside them. */
:lang(ko) h1, :lang(ko) h2, :lang(ko) .res-headline, :lang(ko) .lead, :lang(ko) .btn { word-break: keep-all; }
/* Headlines: avoid a lone last character (CJK); Japanese breaks at phrase boundaries. */
h1, .res-headline { text-wrap: balance; }
:lang(ja) h1, :lang(ja) .res-headline, :lang(ja) .lead { word-break: auto-phrase; }
h2 { font-size: 1.125rem; }
p { margin: 0; }
a { color: var(--cobalt-strong); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 2px; border-radius: 6px; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.mono, code, .val, .src, .tin { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--paper); padding: 8px 12px; z-index: 50; border-radius: 8px; }
.noscript { padding: 16px; }
.h-small { font-size: 1rem; }
.h-tiny { font-size: 0.9375rem; margin: 16px 0 6px; }

/* ---------- app shell ---------- */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(245, 247, 251, 0.96); border-bottom: 1px solid var(--line); margin: 0 -16px; padding: 0 16px; }
.header-row { min-height: 64px; display: flex; align-items: center; gap: 12px 20px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 1.0625rem; letter-spacing: -0.01em; min-height: 44px; }
.brand-mark { flex: none; }
.lane-nav { display: inline-flex; background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.seg { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border-radius: 999px; color: var(--muted); text-decoration: none; font-weight: 600; font-size: 0.9375rem; }
.seg.is-on { background: var(--ink); color: #fff; }
.seg:hover:not(.is-on) { color: var(--ink); }
.lang-wrap { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.lang-label { font-size: 0.875rem; color: var(--muted); }
select, input, textarea, button { font: inherit; color: inherit; }
select { padding: 6px 10px; border: 1px solid var(--line-strong); border-radius: var(--r-ctl); background: var(--paper); min-height: 44px; }
.site-footer { margin-top: 48px; border-top: 1px solid var(--line); padding-top: 14px; font-size: 0.875rem; color: var(--muted); }
.foot-line { margin-bottom: 6px; }
.foot-details summary, details > summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; font-weight: 600; color: var(--ink); }
.foot-details p { margin: 6px 0; }

/* ---------- controls ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 8px 18px;
  border-radius: var(--r-ctl); border: 1px solid var(--line-strong); background: var(--paper); color: var(--ink);
  text-decoration: none; cursor: pointer; font-weight: 600; font-size: 0.9375rem; text-align: center;
  transition: background-color 120ms ease, border-color 120ms ease;
}
.btn:hover { border-color: var(--ink); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn[aria-disabled="true"] { opacity:.55; cursor:wait; box-shadow:none; }
.btn-primary { background: var(--cobalt); border-color: var(--cobalt); color: #fff; }
.btn-primary:hover { background: var(--cobalt-strong); border-color: var(--cobalt-strong); }
.btn-quiet { border-color: transparent; background: transparent; color: var(--cobalt-strong); padding-left: 6px; padding-right: 6px; text-decoration: underline; text-underline-offset: 4px; }
.btn-quiet:hover { border-color: transparent; color: var(--ink); }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-danger { color: var(--amber-ink); border-color: var(--amber-line); }
.btn-lg { min-height: 52px; padding: 10px 24px; font-size: 1rem; }
.btn-small { min-height: 40px; padding: 4px 12px; font-size: 0.875rem; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.8125rem; font-weight: 600; border: 1px solid currentColor; }
.badge-ok { color: var(--ok-ink); background: var(--ok-soft); }
.badge-err { color: var(--amber-ink); background: var(--amber-soft); }
.badge-muted { color: var(--muted); background: #EEF1F6; }
.alert { padding: 10px 14px; border-radius: var(--r-ctl); border: 1px solid; margin: 10px 0; font-size: 0.9375rem; }
.alert-error { color: var(--amber-ink); background: var(--amber-soft); border-color: var(--amber-line); }
.alert-warn { color: #5E4300; background: #FBF6E4; border-color: #D9BC5A; }
.alert-ok { color: var(--ok-ink); background: var(--ok-soft); border-color: #8CC5A6; }
.radio-group { border: 0; padding: 0; margin: 12px 0; min-width: 0; }
.radio-group legend { font-weight: 600; margin-bottom: 4px; padding: 0; }
.radio-row { display: flex; flex-wrap: wrap; gap: 4px 14px; }
.radio { display: inline-flex; align-items: center; gap: 6px; min-height: 44px; }
.radio input, .check-row input, .task-opt input { width: 20px; height: 20px; accent-color: var(--cobalt); margin: 0; flex: none; }
.check-row { display: flex; align-items: center; gap: 10px; min-height: 44px; }
.field-row { display: flex; align-items: center; gap: 10px; margin: 8px 0; flex-wrap: wrap; }
.disc::before { content: "▸"; color: var(--cobalt); margin-right: 6px; }
details[open] > summary .disc::before { content: "▾"; }
details > summary { list-style: none; }
details > summary::-webkit-details-marker { display: none; }
details:not(.settings-m) > summary::before { content: "▸"; color: var(--cobalt); margin-right: 8px; }
details:not(.settings-m)[open] > summary::before { content: "▾"; }

/* ---------- home ---------- */
.hero { display: grid; grid-template-columns: 7fr 5fr; gap: 48px; align-items: center; padding: 48px 0 40px; }
.hero-title { font-size: clamp(2rem, 1.2rem + 2.6vw, 3rem); font-weight: 800; letter-spacing: -0.025em; line-height: 1.12; max-width: 16em; }
.lead { font-size: 1.125rem; color: var(--muted); margin-top: 14px; max-width: 34em; }
.set-line { margin-top: 24px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; font-size: 0.9375rem; }
.set-tag { color: var(--cobalt-strong); font-weight: 700; }
.set-meta { color: var(--muted); font-size: 0.875rem; font-variant-numeric: tabular-nums; }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-top: 14px; }
.trust { margin-top: 14px; color: var(--muted); font-size: 0.875rem; }

/* the signature element: real order sheet with caret in the active cell */
.sheet { margin: 0; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 18px 18px 14px; box-shadow: 0 1px 2px rgba(18, 32, 50, 0.06), 0 12px 32px -12px rgba(18, 32, 50, 0.22); }
.sheet figcaption { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; font-size: 0.8125rem; color: var(--muted); margin-bottom: 10px; }
.sheet-name { color: var(--ink); font-weight: 600; }
.sheet-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 1.0625rem; }
.sheet-table th { font-size: 0.75rem; font-weight: 600; color: var(--muted); text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.sheet-table td { padding: 10px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; position: relative; }
.sheet-table tbody tr:last-child td, .sheet-table tbody tr:last-child th { border-bottom: 0; }
.sheet-table .sheet-no { width: 1.8em; color: var(--faint); font-weight: 500; font-size: 0.8125rem; }
.sheet-table td.is-active { background: var(--cobalt-soft); box-shadow: inset 0 0 0 2px var(--cobalt); border-radius: 8px; }
.caret { display: inline-block; width: 2px; height: 1.15em; background: var(--cobalt); vertical-align: -0.2em; margin-left: 2px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.sheet-note { margin-top: 10px; font-size: 0.8125rem; color: var(--muted); }
.sets { padding: 8px 0 0; }
.sets > h2 { margin-bottom: 12px; }
.set-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 32px; border-top: 1px solid var(--line); }
.set-item { display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); }
.set-head { display: flex; flex-wrap: wrap; gap: 2px 10px; align-items: baseline; }
.set-head h3 { font-size: 1rem; }
.set-sample { grid-column: 1; color: var(--muted); font-size: 0.9375rem; overflow-wrap: anywhere; }
.set-sample.mono { white-space: normal; }
.set-open { grid-column: 2; grid-row: 1 / span 2; min-height: 44px; display: inline-flex; align-items: center; font-weight: 600; }
.how { margin-top: 36px; }
.how-steps { margin: 12px 0 0; padding: 0; list-style: none; counter-reset: s; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.how-steps li { counter-increment: s; padding-top: 10px; border-top: 2px solid var(--ink); font-weight: 600; }
.how-steps li::before { content: counter(s); display: block; color: var(--cobalt-strong); font-variant-numeric: tabular-nums; font-size: 0.875rem; margin-bottom: 4px; }
.example { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin-top: 16px; font-size: 0.9375rem; padding: 10px 12px; border: 1px dashed var(--line-strong); border-radius: var(--r-ctl); background: var(--paper); }
.example-tag { font-size: 0.8125rem; color: var(--muted); }
.example-typed { text-decoration: underline wavy var(--amber-line); }
.example-op { color: var(--amber-ink); font-weight: 600; }
.pc-bottom { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 36px; align-items: start; }
.history, .setup { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px 16px; }
.history .h-small { margin-bottom: 4px; }
.hist-list { list-style: none; padding: 0; margin: 4px 0; }
.hist-list li { display: flex; flex-wrap: wrap; gap: 2px 10px; padding: 8px 0; border-top: 1px solid var(--line); font-size: 0.875rem; align-items: center; }
.hist-when { color: var(--muted); font-variant-numeric: tabular-nums; }
.hist-num { font-variant-numeric: tabular-nums; }
.setup > summary { font-weight: 600; }
.setup-body { padding-top: 4px; }
.setup .history { border: 0; padding: 8px 0 0; border-top: 1px solid var(--line); border-radius: 0; margin-top: 8px; }

/* mobile home */
.home-mobile .hero { display: block; padding: 14px 0 8px; }
.home-mobile .hero-title { font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2rem); }
.home-mobile .lead { font-size: 1rem; margin-top: 8px; }
.m-rec { margin-top: 12px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px; box-shadow: 0 10px 24px -14px rgba(18, 32, 50, 0.25); }
.m-rec .set-line { margin-top: 0; }
.m-preview { margin: 8px 0 10px; }
.m-preview figcaption { font-size: 0.8125rem; color: var(--muted); margin-bottom: 6px; }
.m-values { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; margin: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.m-values div { padding: 8px 10px; border-bottom: 1px solid var(--line); }
.m-values div:nth-child(odd) { border-right: 1px solid var(--line); }
.m-values div:nth-last-child(-n+2) { border-bottom: 0; }
.m-values dt { font-size: 0.75rem; color: var(--muted); }
.m-values dd { margin: 0; font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: 1.125rem; font-weight: 600; white-space: nowrap; }
.m-rec .btn-primary { width: 100%; min-height: 52px; }
.home-mobile .trust { margin-top: 10px; }
.m-alt { margin-top: 14px; padding: 14px 0; border-top: 1px solid var(--line); display: grid; gap: 4px; }
.m-alt h2 { font-size: 1rem; }
.reply-sample { font-size: 1rem; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 8px 12px; margin: 4px 0 2px; }
.m-alt .btn { justify-self: start; min-height: 44px; }
.home-mobile .setup { margin-top: 8px; }
.home-mobile .how { margin-top: 20px; }
.home-mobile .how-steps { grid-template-columns: 1fr; gap: 10px; }

/* ---------- practice: page + session preview ---------- */
.page-title { font-size: 1.5rem; margin-top: 22px; letter-spacing: -0.01em; }
.page-sub { color: var(--muted); font-size: 0.875rem; margin-top: 4px; }
.practice-body { margin-top: 16px; }
.describe { display: grid; grid-template-columns: 7fr 5fr; gap: 24px; align-items: start; }
.preview-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 20px; display: grid; gap: 10px; }
.preview-name { font-size: 1.25rem; }
.preview-sample .sheet-mini { font-size: 1rem; }
.preview-lines { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.preview-lines li { display: grid; gap: 2px; padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--r-ctl); }
.line-label { font-size: 0.75rem; color: var(--muted); }
.line-val { font-size: 1.0625rem; overflow-wrap: anywhere; }
.strict { color: var(--muted); font-size: 0.9375rem; }
.preview-card .actions { margin: 4px 0 0; }
.task-pick { border: 0; padding: 0; margin: 0; display: grid; gap: 8px; min-width: 0; }
.task-pick legend { font-weight: 600; margin-bottom: 6px; padding: 0; }
.task-opt { display: grid; grid-template-columns: auto 1fr; gap: 0 10px; align-items: center; padding: 10px 12px; min-height: 52px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-ctl); cursor: pointer; }
.task-opt:has(input:checked) { border-color: var(--cobalt); box-shadow: inset 0 0 0 1px var(--cobalt); }
.task-opt-name { font-weight: 600; }
.task-opt-meta { grid-column: 2; font-size: 0.8125rem; color: var(--muted); }
.rules { margin-top: 12px; font-size: 0.9375rem; }
.rules ul { margin: 4px 0 0; padding-left: 1.2em; }
.situation { font-size: 1rem; background: var(--cobalt-soft); padding: 10px 12px; border-radius: var(--r-ctl); }

/* ---------- trainer shared ---------- */
.tin { width: 100%; min-height: 48px; padding: 8px 12px; border: 1.5px solid var(--line-strong); border-radius: var(--r-ctl); background: var(--paper); font-size: 1.125rem; }
.tin:focus { border-color: var(--cobalt); outline: 3px solid var(--cobalt-soft); outline-offset: 0; }
.tin[aria-invalid="true"] { border-color: var(--amber-line); border-style: dashed; background: #FFFBF3; }
.tin[readonly] { background: #EEF1F6; color: var(--muted); }
textarea.tin, .tin.tin-text { font-family: var(--font); }
.field-err { color: var(--amber-ink); font-size: 0.875rem; margin: 4px 0 0; }
.field-err::before { content: "⚠ "; }
.msg { min-height: 1.5em; margin: 8px 0; font-size: 0.9375rem; }
.msg-on { padding: 6px 12px; border-radius: var(--r-ctl); background: var(--cobalt-soft); }
.msg-error { background: var(--amber-soft); color: var(--amber-ink); border: 1px solid var(--amber-line); }
.progress { font-weight: 700; margin: 0; font-variant-numeric: tabular-nums; }
.trainer.is-paused .pairs, .trainer.is-paused .m-card { opacity: 0.55; }

/* PC trainer */
.trainer-pc .strict { margin-bottom: 4px; }
.train-bar { position: sticky; top: 64px; z-index: 5; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; background: var(--canvas); padding: 10px 0; border-bottom: 1px solid var(--line); }
.train-bar .actions { margin: 0; }
.pairs { display: grid; gap: 6px; margin-top: 4px; }
.pair { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; padding: 8px 10px; border-radius: 12px; border: 1px solid transparent; }
.pair.current { background: var(--paper); border-color: var(--cobalt); box-shadow: 0 0 0 1px var(--cobalt); }
.now-tag { position: absolute; top: -10px; left: 12px; background: var(--cobalt); color: #fff; font-size: 0.75rem; font-weight: 700; padding: 1px 8px; border-radius: 999px; }
.pair-head { padding-bottom: 0; }
.pair-head h2 { font-size: 0.9375rem; color: var(--muted); }
.cells { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; align-items: center; }
.col-src.cells { grid-template-columns: 2em repeat(3, minmax(0, 1fr)); }
.pair-cols span { font-size: 0.8125rem; color: var(--muted); font-weight: 600; }
.rowno, .lineno { color: var(--faint); font-size: 0.8125rem; font-variant-numeric: tabular-nums; }
.src { font-size: 1.125rem; background: #EEF2F8; padding: 10px 12px; border-radius: 8px; overflow-wrap: anywhere; }
.pair.current .src { background: var(--cobalt-soft); color: var(--ink); font-weight: 600; }
.src-line { margin: 2px 0 0; font-family: var(--font); }
.cell { display: block; }
.rowno-spacer { display: none; }
.cells .src { white-space: nowrap; overflow-wrap: normal; }
@media (max-width: 899px) {
  .pair, .pair-head { grid-template-columns: 1fr; gap: 6px; }
  .pair-cols, .pair-head { display: none; }
  .cells { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .col-src.cells { grid-template-columns: 1.8em repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .col-src.cells, .col-in.cells { grid-template-columns: 1.4em repeat(3, minmax(0, 1fr)); gap: 4px; }
  .col-in.cells .rowno-spacer { display: block; }
  .tin { padding: 8px 6px; font-size: 1rem; }
  .cells .src { font-size: 0.875rem; padding: 6px 5px; }
}

/* Mobile trainer: pinned to the visual viewport; source, input, next and pause stay above the keyboard */
.m-training body { overflow: hidden; }
.trainer-m {
  position: fixed; left: 0; right: 0; top: var(--vvtop); height: var(--vvh);
  display: flex; flex-direction: column; background: var(--canvas); z-index: 20;
  padding: env(safe-area-inset-top) max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left));
}
.m-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--line); flex: 0 0 auto; }
.m-mid { flex: 1 1 auto; overflow-y: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; padding: 12px 0; }
.m-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 14px; }
.m-label { display: block; font-weight: 600; color: var(--muted); font-size: 0.875rem; }
.m-src { margin: 6px 0 12px; padding: 10px 12px; background: var(--cobalt-soft); border-radius: var(--r-ctl); }
.m-target { font-size: 1.375rem; margin: 0; overflow-wrap: anywhere; line-height: 1.35; font-weight: 600; }
.m-chips { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.chip { min-width: 44px; min-height: 44px; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--paper); font-weight: 600; font-variant-numeric: tabular-nums; }
.chip.filled { background: #EEF1F6; }
.chip.current { background: var(--ink); color: #fff; border-color: var(--ink); }
.m-bar { flex: 0 0 auto; display: grid; grid-template-columns: 1fr 1.5fr; gap: 10px; padding: 10px 0 max(10px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); background: var(--canvas); }
.m-bar .btn { min-height: 48px; }
.m-bar .btn[hidden] { display: none; }
.m-sheet { position: absolute; left: 10px; right: 10px; top: 52px; bottom: 76px; overflow: auto; z-index: 3; background: var(--paper); border: 2px solid var(--cobalt); border-radius: var(--r-card); padding: 14px; }
.m-sheet[hidden] { display: none; }
.vv-compact .m-chips { display: none; }
.vv-compact .m-src { margin: 2px 0 6px; padding: 6px 10px; }
.vv-compact .m-target { font-size: 1.0625rem; }
.vv-compact .m-top { padding: 4px 0; }
.vv-compact .m-card { padding: 8px; }
.vv-compact .m-bar .btn { min-height: 44px; }
.vv-compact .m-bar { padding-top: 6px; padding-bottom: max(6px, env(safe-area-inset-bottom)); }
.vv-compact .m-mid { padding: 4px 0; }
.vv-compact .msg { margin: 4px 0; }

/* transfer */
.transfer { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 18px; display: grid; gap: 10px; }
/* R10: .actions sets display:flex, which overrides the UA [hidden] rule; keep the next actions truly hidden until a valid check. */
.transfer .transfer-next[hidden] { display: none; }
.token-list { list-style: none; padding: 0; margin: 0; }
.tok-ok .tok-mark { color: var(--ok-ink); font-weight: 700; }
.tok-miss .tok-mark { color: var(--amber-ink); font-weight: 700; }
.big { font-size: 1.25rem; font-weight: 700; }

/* ---------- results ---------- */
.res-headline { font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.25rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; margin: 6px 0 10px; }
.results .page-title { font-size: 1rem; color: var(--muted); font-weight: 600; }
.res-done { font-weight: 600; margin: 6px 0; }
.res-main { display: grid; grid-template-columns: 5fr 7fr; gap: 28px; align-items: start; margin-top: 4px; }
.res-summary { display: grid; gap: 10px; }
.res-focus { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 18px; }
.res-focus .h-small { margin-bottom: 8px; }
.success { font-size: 1.125rem; font-weight: 600; color: var(--ok-ink); }
.actions-primary { margin-top: 16px; }
.stats-compact { display: flex; flex-wrap: wrap; gap: 0; margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.stats-compact .stat { flex: 1 1 140px; padding: 10px 14px; border-right: 1px solid var(--line); }
.stats-compact .stat:last-child { border-right: 0; }
.stat dt { color: var(--muted); font-size: 0.8125rem; }
.stat dd { margin: 2px 0 0; font-size: 1.125rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat dd.stat-note { font-size: 0.75rem; font-weight: 400; color: var(--muted); }
.res-more { margin-top: 16px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); padding: 6px 16px 12px; }
.res-more .stats-compact { margin-top: 6px; }
.err-counts { list-style: none; padding: 0; margin: 0; display: flex; gap: 18px; flex-wrap: wrap; font-weight: 600; }
.op-label { font-weight: 700; }
.op-del, .op-sub, .op-ins { color: var(--amber-ink); }
.op-pos { color: var(--muted); font-size: 0.8125rem; }
.diff-list { padding-left: 1.2em; margin: 0; }
.diff-list > li { margin: 10px 0; }
.pair-diff .diff-head { margin: 0 0 6px; }
.diff-lines { display: grid; gap: 4px; }
.diff-lines p { display: flex; gap: 10px; align-items: baseline; }
.dl-k { flex: 0 0 5.5em; color: var(--muted); font-size: 0.8125rem; }
.dline { font-family: var(--mono); font-size: 1.125rem; overflow-wrap: anywhere; }
.dline del, .dline ins, .dline mark { color: var(--amber-ink); background: var(--amber-soft); text-decoration-thickness: 2px; padding: 0 2px; border-radius: 3px; }
.dline del { text-decoration: line-through; }
.dline ins { text-decoration: underline; }
.dline mark { text-decoration: underline wavy; }
.ops { margin: 8px 0 0; padding-left: 1.1em; font-size: 0.9375rem; }
.ops code { border: 1px solid var(--line); background: #fff; padding: 0 5px; border-radius: 4px; font-size: 1rem; }
.cond-list { margin: 0; padding-left: 1.2em; font-size: 0.875rem; }
.empty { font-size: 1.125rem; margin-top: 10px; }

dialog.dlg { border: 1px solid var(--line); border-radius: var(--r-card); padding: 20px; max-width: min(420px, 92vw); color: var(--ink); }
dialog.dlg::backdrop { background: rgba(18, 32, 50, 0.35); }
.dlg-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 14px; }

.root-pick { padding: 40px 0; }
.lang-list { list-style: none; padding: 0; display: grid; gap: 10px; margin-top: 16px; }
.lang-list a { display: block; padding: 14px 16px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-card); text-decoration: none; color: var(--ink); font-weight: 600; }

/* ---------- responsive ---------- */
@media (max-width: 899px) {
  .hero { grid-template-columns: 1fr; gap: 24px; padding: 28px 0 24px; }
  .describe, .res-main, .pc-bottom { grid-template-columns: 1fr; }
  .res-focus { order: -1; }
  .set-list { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .lang-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .header-row { min-height: 56px; gap: 8px 10px; }
  .seg { padding: 0 11px; }
  .how-steps { grid-template-columns: 1fr; }
  .page-title { margin-top: 14px; }
}
/* R6 compact header: the brand name stays visible. One row down to 400px; below that the
   PC/Phone switch moves to its own full-width row (still 44px targets, no overflow). */
@media (max-width: 440px) {
  .header-row { flex-wrap: nowrap; gap: 8px; }
  .brand { font-size: 1rem; gap: 6px; }
  .seg { padding: 0 10px; font-size: 0.875rem; }
  .lang-wrap select { max-width: 116px; padding: 6px 6px; }
}
@media (max-width: 399px) {
  .header-row { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "brand lang" "seg seg"; gap: 2px 8px; padding: 4px 0 6px; }
  .brand { grid-area: brand; }
  .lang-wrap { grid-area: lang; }
  .lane-nav { grid-area: seg; display: grid; grid-template-columns: 1fr 1fr; }
  .seg { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

/* R6 headline phrasing: one block per meaning line; units never break internally. */
.hl-line { display: block; }
.hl-unit { white-space: nowrap; }
/* R6 diagnosis of look-alike differences */
.diag { margin: 8px 0 0; padding: 8px 12px; border-radius: var(--r-ctl); background: var(--amber-soft); color: var(--amber-ink); border: 1px solid var(--amber-line); font-size: 0.9375rem; display: grid; gap: 2px; }
.diag-detail { color: var(--ink); }
.diag code { border: 1px solid var(--line); background: #fff; padding: 0 5px; border-radius: 4px; font-size: 1.0625rem; }

/* MOBILE-UX-R1: task selection / working input / correction have distinct visual roles.
   Original vectors and actual corpus previews; no remote fonts, decorative photos or scores. */
:root { --canvas:#F4F8F7; --ink:#142E35; --muted:#486168; --faint:#566D73; --line:#D9E5E2; --line-strong:#A6BDB8; --cobalt:#08766E; --cobalt-strong:#065D57; --cobalt-soft:#E3F3EF; --amber-ink:#913E27; --amber-line:#BE7356; --amber-soft:#FFF1E9; --r-card:18px; }
.site-header { background:rgba(244,248,247,.97); }
.brand-mark { color:var(--cobalt); }
.btn-primary { box-shadow:0 3px 0 rgba(6,93,87,.14); }
.eyebrow { font-size:.75rem; font-weight:750; color:var(--cobalt-strong); letter-spacing:.055em; margin-bottom:10px; }
.task-hero { display:block; padding:24px 0 20px; }
.task-hero .hero-title { font-size:clamp(1.5rem,1.1rem + 2.2vw,2.8rem); line-height:1.25; }
.task-hero .lead { margin:10px 0 0; max-width:42em; font-size:.9375rem; }
.task-hero .trust { margin:10px 0 0; font-size:.75rem; }
.task-workbench { display:grid; grid-template-columns:1fr 1fr; gap:32px; align-items:start; }
.task-workbench>* { min-width:0; }
.task-choice>h2 { margin:0 0 12px; font-size:1rem; }
.task-rail { display:flex; gap:10px; overflow-x:auto; overflow-y:hidden; scroll-snap-type:x mandatory; scrollbar-width:none; touch-action:pan-x pan-y; overscroll-behavior-x:contain; padding:3px 3px 8px; cursor:grab; }
.task-rail::-webkit-scrollbar { display:none; }
.task-rail.is-dragging { scroll-snap-type:none; cursor:grabbing; user-select:none; }
.task-card { position:relative; flex:0 0 76%; scroll-snap-align:start; border:1px solid var(--line); border-radius:16px; background:var(--paper); display:grid; grid-template-columns:32px 1fr; gap:5px 10px; padding:14px; cursor:pointer; min-width:0; }
.task-card>input { position:absolute; opacity:0; width:1px; height:1px; }
.task-card:has(input:checked) { background:var(--cobalt-soft); border-color:var(--cobalt); box-shadow:inset 0 0 0 1px var(--cobalt); }
.task-card:has(input:focus-visible) { outline:3px solid var(--cobalt); outline-offset:2px; }
.task-icon { color:var(--cobalt-strong); grid-row:1/3; flex:none; }
.task-track { font-size:.75rem; color:var(--muted); }
.task-card strong { font-size:.9375rem; line-height:1.35; }
.task-card-meta,.task-card-sample { grid-column:1/-1; font-size:.75rem; color:var(--muted); }
.task-card-sample { font-family:var(--mono); overflow-wrap:anywhere; color:var(--ink); }
.rail-controls { display:flex; justify-content:space-between; align-items:center; padding:0 2px; }
.rail-controls>div { display:flex; gap:4px; }
.rail-position { font-size:.75rem; font-variant-numeric:tabular-nums; color:var(--muted); }
.rail-arrow { width:44px; height:44px; border:0; border-radius:50%; background:transparent; font-size:1.6rem; cursor:pointer; color:var(--ink); }
.rail-arrow:hover:not(:disabled) { background:var(--cobalt-soft); }
.rail-arrow:disabled { color:var(--line-strong); cursor:default; }
.selected-task { background:var(--paper); border:1px solid var(--line); border-radius:var(--r-card); padding:18px; box-shadow:0 8px 30px -22px #142e35; }
.selected-task .set-line { display:flex; gap:10px; align-items:center; margin:0; }
.selected-task .set-line>span { display:grid; gap:4px; }
.selected-task .set-line strong { font-size:1rem; }
.selected-task .set-meta { font-size:.75rem; color:var(--muted); }
.selected-task .btn-primary { width:100%; }
.selected-task .sheet { border:0; box-shadow:none; border-radius:0; padding:0; margin:12px 0; }
.selected-task figcaption { font-size:.75rem; color:var(--muted); margin-bottom:8px; }
.reply-preview { margin:8px 0 14px; padding:0; list-style:none; display:grid; gap:8px; }
.reply-preview li { padding:10px 12px; border-radius:12px 12px 12px 3px; background:var(--cobalt-soft); font-size:.9375rem; }
.home-options { display:grid; grid-template-columns:1fr 1fr; gap:24px; margin-top:24px; }
.home-options .setup { margin:0; border:0; background:transparent; padding:0; }
.how-compact { margin:0; }
.how-compact .how-steps { padding:0 0 0 22px; }
.describe-side { min-width:0; }
.task-pick { display:block; }
.task-pick .task-opt { flex:0 0 82%; scroll-snap-align:start; min-width:0; }
.training-task-name { font-size:.8125rem; font-weight:650; color:var(--muted); }
.m-task-context { display:grid; gap:2px; }
.m-task-context .progress { font-size:.9375rem; }
.field-progress { width:100%; height:3px; border:0; appearance:none; flex:0 0 3px; margin:0; background:var(--line); }
.field-progress::-webkit-progress-bar { background:var(--line); }
.field-progress::-webkit-progress-value { background:var(--cobalt); }
.field-progress::-moz-progress-bar { background:var(--cobalt); }
.m-card { border:0; background:transparent; padding:12px 0; }
.m-src { border-left:3px solid var(--cobalt); border-radius:0 12px 12px 0; }
.m-card .tin { min-height:54px; font-size:1.125rem; padding:12px; }
.m-top .btn-small { min-height:44px; }
.transfer-context { grid-column:2; }
.transfer-context .situation { margin-top:6px; }
.transfer-context[open] { grid-column:1/-1; }
.transfer-required { background:var(--cobalt-soft); border-left:3px solid var(--cobalt); padding:8px 10px; font-size:.875rem; }
.results .res-focus { border-top:3px solid var(--cobalt); }
.results .res-focus:has(.is-diff) { border-top-color:var(--amber-line); }
.results .res-headline { color:var(--ink); }
/* The phone lane remains the same working surface when a wide phone rotates past 899px. */
.transfer-active body { overflow:hidden; }
.transfer-active .transfer { position:fixed; z-index:20; top:var(--vvtop); left:0; right:0; height:var(--vvh); border:0; border-radius:0; padding:10px max(16px,env(safe-area-inset-right)) max(10px,env(safe-area-inset-bottom)); overflow-y:auto; overscroll-behavior:contain; display:grid; grid-template-columns:1fr auto; gap:8px; align-content:start; background:var(--canvas); }
.transfer-active .transfer>* { grid-column:1/-1; }
.transfer-active .transfer>h2 { grid-column:1; align-self:center; font-size:1rem; }
.transfer-active .transfer>.transfer-context:not([open]) { grid-column:2; }
.transfer-context summary { min-height:44px; font-size:.8125rem; }
.transfer-check-row { position:sticky; bottom:0; z-index:2; background:var(--canvas); padding:6px 0; margin:0; }
.transfer-check-row .btn { width:100%; }
.transfer-active textarea { min-height:90px; resize:vertical; }
.transfer-next .btn { width:100%; }
@media (max-width:899px) {
 .task-workbench { grid-template-columns:1fr; gap:14px; }
 .home-options { grid-template-columns:1fr; gap:8px; margin-top:18px; }
 .practice-mobile .describe { display:flex; flex-direction:column; gap:14px; }
 .practice-mobile .describe-side { order:-1; width:100%; }
 .practice-mobile .rules { margin:0; }
 .practice-mobile .preview-card { width:100%; padding:16px; }
 .task-hero { padding:20px 0 16px; }
 .task-card { flex-basis:79%; }
 .selected-task { padding:14px; }
}
@media (max-width:560px) {
 .task-card { padding:10px 12px; gap:3px 8px; }
 .task-card .task-icon { width:28px; height:28px; }
 .task-card strong { font-size:.875rem; }
 .task-card-sample { max-height:2.7em; overflow:hidden; }
 .task-home .hero-title { font-size:1.5rem; }
 .task-home .lead { font-size:.875rem; }
 .task-home .eyebrow { margin-bottom:6px; }
 .task-home .eyebrow { display:none; }
 .task-home .m-preview { margin:10px 0 12px; }
 .m-values dd { font-size:1.0625rem; }
 .site-footer { margin-top:28px; }
 .task-hero { padding:12px 0; }
 .task-home .hero-title { font-size:1.375rem; }
 .task-hero .lead { margin-top:6px; }
 .task-hero .trust { margin-top:6px; }
 .selected-task .set-line .task-icon,.selected-task .set-line .set-meta { display:none; }
 .selected-task .set-line strong { font-size:.875rem; }
 .selected-task figcaption { margin-bottom:6px; }
 .selected-task .m-values div { padding:6px 8px; }
}
@media (max-height:420px) {
 .transfer-active .transfer { gap:4px; padding-top:4px; }
 .transfer-active textarea { min-height:60px; height:60px; }
 .transfer-active .transfer-note { font-size:.75rem; }
 .transfer-active .transfer-required { padding:5px 8px; }
 .vv-compact .m-top { padding:4px 0; }
 .vv-compact .training-task-name { font-size:.75rem; }
 .vv-compact .m-card .tin { min-height:48px; padding:8px 10px; }
}

/* Fieldline Focus Studio / 2026-10-16. Presentation only; no gesture or input controller changes. */
:root { --canvas:#F7F8FC; --paper:#FFFFFF; --ink:#1B2340; --muted:#536079; --faint:#66728A; --line:#E0E4EF; --line-strong:#B6BFD3; --cobalt:#59459B; --cobalt-strong:#443379; --cobalt-soft:#F0ECFA; --amber-ink:#963D27; --amber-line:#B35A39; --amber-soft:#FFF1E9; --ok-ink:#23694F; --ok-soft:#E8F5ED; --r-card:22px; --r-ctl:12px; }
body { letter-spacing:-.012em; }
#app { max-width:1240px; padding-left:28px; padding-right:28px; }
.site-header { margin:0; padding:0; background:var(--canvas); border-bottom:1px solid var(--line); }
.header-row { min-height:82px; gap:24px; }
.brand { font-size:1.25rem; letter-spacing:-.045em; gap:10px; }
.brand-mark { width:32px; height:32px; }
.lane-nav { padding:4px; border:0; background:#ECEEF5; }
.seg { padding:0 21px; font-size:.875rem; }
.seg.is-on { background:var(--ink); box-shadow:0 2px 6px #1b234018; }
.lang-label { font-size:.75rem; }
.lang-select { background:transparent; border:0; padding-right:4px; }
.btn { border-radius:12px; font-weight:700; transition:none; }
.btn-primary { background:var(--cobalt); border-color:var(--cobalt); box-shadow:none; }
.btn-primary:hover { background:var(--cobalt-strong); }
.btn:focus-visible,.seg:focus-visible { outline-offset:4px; }
.btn-quiet { color:var(--cobalt-strong); }
.task-hero { display:grid; grid-template-columns:1fr 1fr; gap:44px; padding:38px 0 30px; align-items:center; }
.task-hero .hero-title { font-size:clamp(2rem,3.3vw,3.1rem); font-weight:800; line-height:1.2; letter-spacing:-.055em; max-width:13em; }
.task-hero .lead { font-size:1rem; line-height:1.7; max-width:32em; margin-top:18px; }
.task-hero .trust { display:inline-flex; border-left:3px solid var(--cobalt); padding-left:10px; font-size:.75rem; margin-top:20px; }
.eyebrow { letter-spacing:.05em; color:var(--cobalt-strong); font-size:.75rem; }
.studio-illustration { margin:0; min-width:0; }
.studio-art-title { display:flex; gap:8px; align-items:center; font-size:.75rem; font-weight:700; padding:0 4px 10px; color:var(--muted); }
.studio-light { width:7px; height:7px; background:var(--cobalt); border-radius:50%; }
.studio-keyboard { display:block; width:100%; height:auto; }
.art-surface { fill:#1D2440; }
.art-display { fill:#303954; }
.art-code { fill:#F7F9FF; font:600 30px var(--mono); }
.art-error { fill:#F0B798; }
.art-arrow { stroke:#909CB9; stroke-width:2; fill:none; }
.art-error-line { stroke:#F0B798; stroke-width:2; }
.art-key { fill:#3B4562; stroke:#65708C; stroke-width:.7; }
.art-key-focus,.art-signal { fill:#D9F272; }
.art-letter { fill:#D8DFED; font:500 12px var(--mono); }
.art-key-focus+.art-letter { fill:#1B2340; }
.art-phone { fill:#F8F9FC; stroke:#929EB9; stroke-width:2; }
.art-phone-notch { fill:#BAC3D5; }
.art-phone-source { fill:#E7E2F5; }
.art-phone-input { fill:white; stroke:#7762B3; stroke-width:1.5; }
.art-phone-code { fill:#2C3450; font:600 17px var(--mono); }
.art-phone-key { fill:#DDE3ED; }
.art-check { stroke:#3F7757; stroke-width:3; fill:none; stroke-linecap:round; stroke-linejoin:round; }
.studio-illustration figcaption { padding:10px 3px 0; display:flex; flex-wrap:wrap; justify-content:space-between; gap:6px; font-size:.7rem; color:var(--muted); }
.studio-illustration figcaption strong { color:var(--ink); font-weight:600; }
.task-workbench { grid-template-columns:minmax(0,1fr) minmax(0,1.12fr); gap:30px; border-top:1px solid var(--line); padding-top:28px; }
.task-choice>h2 { font-size:1.05rem; letter-spacing:-.025em; margin-bottom:16px; }
.task-card { background:transparent; border-color:var(--line-strong); border-radius:18px; padding:19px; gap:8px 12px; }
.task-card:has(input:checked) { background:var(--cobalt-soft); border-color:var(--cobalt); box-shadow:inset 0 0 0 1px var(--cobalt); }
.task-card .task-icon { background:var(--paper); padding:5px; width:40px; height:40px; border-radius:10px; }
.task-card strong { font-size:1rem; }
.task-card-sample { font-size:.875rem; color:var(--cobalt-strong); margin-top:10px; }
.rail-position { letter-spacing:.12em; font-family:var(--mono); }
.rail-arrow { font-size:1.3rem; }
.selected-task { border:0; padding:24px; box-shadow:0 10px 36px #1b23400b; }
.selected-task .set-line strong { font-size:1.05rem; }
.selected-task .sheet { margin:22px 0; }
.selected-task figcaption { margin-bottom:12px; }
.sheet-table { border-color:var(--line); }
.sheet-table th { background:#F4F5FA; color:var(--muted); font-weight:600; }
.sheet-table td.is-active { background:var(--cobalt-soft); }
.m-values { border-color:var(--line); border-radius:14px; overflow:hidden; }
.m-values dd { color:var(--ink); font-weight:600; }
.home-options { padding-top:10px; border-top:1px solid var(--line); margin-top:28px; }
.home-options summary { font-size:.875rem; }
.how-steps { gap:16px; }
.site-footer { font-size:.75rem; margin-top:36px; padding-top:18px; }
.page-title { font-size:2rem; font-weight:750; letter-spacing:-.045em; margin-top:28px; }
.page-sub { margin-top:8px; }
.practice-body { margin-top:24px; }
.preview-card { border:0; padding:28px; box-shadow:0 8px 32px #1b234009; }
.preview-name { font-size:1.3rem; letter-spacing:-.035em; }
.preview-sample { margin:20px 0; }
.describe { gap:30px; }
.task-pick legend { font-size:.875rem; margin-bottom:12px; }
.task-opt { border-radius:16px; }
.trainer-pc { background:white; border:1px solid var(--line); border-radius:22px; padding:20px; }
.train-bar { background:var(--paper); top:82px; padding:8px 0 18px; margin-bottom:12px; }
.train-bar .progress { font-size:1rem; }
.pair { padding:18px 14px; border:1px solid var(--line); border-radius:14px; gap:22px; }
.pair.current { border-color:var(--cobalt); background:#FAF8FF; box-shadow:0 0 0 1px var(--cobalt); }
.pair.current .src { background:#ECE7F8; }
.tin { background:white; border-color:var(--line-strong); border-radius:9px; min-height:48px; font-size:1.1rem; }
.tin:focus { box-shadow:0 0 0 3px #59459b18; }
.now-tag { background:var(--cobalt); }
.trainer-m { background:var(--canvas); }
.m-top { padding:12px 0; }
.training-task-name { color:var(--cobalt-strong); }
.m-label { font-size:.75rem; letter-spacing:.025em; }
.m-src { background:var(--cobalt-soft); border-left-color:var(--cobalt); padding:18px 16px; }
.m-card .tin { min-height:60px; border-radius:12px; padding:16px; font-size:1.25rem; }
.m-target { font-size:1.5rem; }
.m-chips { gap:8px; margin-top:20px; }
.chip { border-radius:10px; font-size:.875rem; }
.chip.current { background:var(--cobalt); border-color:var(--cobalt); }
.chip.filled:not(.current) { background:#E8F5ED; border-color:#9AB8A6; }
.m-bar .btn { min-height:52px; }
.field-progress { height:4px; border-radius:3px; }
.transfer-active .transfer { background:var(--canvas); }
.transfer-required { border-radius:0 10px 10px 0; }
.transfer-in,.transfer textarea { border-radius:12px; }
.transfer .big { font-size:1.2rem; }
.results .page-title { font-size:.875rem; letter-spacing:.02em; }
.res-top { padding:18px 0 12px; border-bottom:1px solid var(--line); margin-bottom:24px; }
.res-headline { font-size:2.25rem; line-height:1.2; letter-spacing:-.045em; }
.res-main { grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr); gap:30px; }
.res-summary { gap:14px; }
.studio-result-visual { display:grid; grid-template-columns:130px 1fr; grid-template-rows:auto auto; align-items:end; column-gap:14px; background:#F0ECFA; padding:20px; border-radius:22px; }
.studio-accuracy { width:130px; height:130px; grid-row:1/3; }
.accuracy-track,.accuracy-value { fill:none; stroke-width:10; }
.accuracy-track { stroke:#DBD4ED; }
.accuracy-value { stroke:var(--cobalt); transform:rotate(-90deg); transform-origin:80px 80px; stroke-linecap:round; }
.accuracy-number { fill:var(--ink); font:750 26px var(--font); }
.studio-result-visual>p { font-size:.875rem; font-weight:650; align-self:end; }
.studio-field-dots { display:flex; gap:6px; flex-wrap:wrap; align-self:start; margin-top:10px; }
.field-dot { width:23px; height:23px; border-radius:7px; display:grid; place-items:center; font:700 12px var(--font); }
.field-dot.correct { color:#305B3B; background:#D9F272; }
.field-dot.incorrect { color:var(--amber-ink); background:#FFDED0; }
.stats-compact { border-radius:16px; }
.stats-compact .stat { padding:14px 16px; }
.stat dd { font-size:1.2rem; letter-spacing:-.025em; }
.res-focus { border:0; padding:26px; box-shadow:0 8px 32px #1b234009; }
.diff-lines { margin:18px 0; gap:12px; }
.diff-lines p { display:block; padding:12px 14px; background:#F7F8FC; border-radius:10px; }
.dl-k { display:block; margin-bottom:6px; font-size:.75rem; }
.dline { font-size:1.4rem; line-height:1.5; }
.dline del,.dline ins,.dline mark { padding:0 3px; }
.res-more { border:0; border-top:1px solid var(--line); background:transparent; border-radius:0; padding:12px 0; }
.res-more>summary { font-size:.875rem; }
@media(min-width:1500px) { .task-hero { padding-top:52px; padding-bottom:42px; } }
@media(max-width:899px) {
 #app { padding-left:20px; padding-right:20px; }
 .header-row { min-height:68px; gap:10px; }
 .task-hero { grid-template-columns:1fr; gap:18px; padding:24px 0; }
 .task-hero .hero-title { font-size:2rem; max-width:20em; }
 .studio-illustration { max-width:520px; }
 .task-workbench { grid-template-columns:1fr; gap:18px; padding-top:22px; }
 .res-main { grid-template-columns:1fr; gap:20px; }
 .res-top { margin-bottom:20px; }
 .train-bar { top:68px; }
}
@media(max-width:560px) {
 #app { padding-left:16px; padding-right:16px; }
 .header-row { min-height:65px; gap:8px; flex-wrap:nowrap; }
 .brand { font-size:1.05rem; gap:6px; }
 .brand-mark { width:26px; height:26px; }
 .lane-nav { width:auto; margin:0; order:0; padding:3px; margin-left:auto; }
 .seg { min-height:40px; padding:0 10px; font-size:.75rem; }
 .lang-wrap { width:auto; margin-left:0; }
 .lang-label { display:none; }
 .lang-select { max-width:86px; font-size:.75rem; padding-left:4px; }
 .task-hero { grid-template-columns:1fr; padding:22px 0 16px; gap:0; }
 .task-hero .hero-title { font-size:1.75rem; line-height:1.25; max-width:15em; }
 .task-hero .lead { font-size:.875rem; line-height:1.65; margin-top:10px; }
 .task-hero .trust { margin-top:12px; font-size:.7rem; }
 .studio-illustration { display:none; }
 .task-workbench { padding-top:18px; gap:14px; }
 .task-choice>h2 { font-size:.9rem; margin-bottom:10px; }
 .task-card { padding:12px; gap:4px 9px; }
 .task-card .task-icon { width:34px; height:34px; }
 .task-card strong { font-size:.9rem; }
 .task-card-sample { margin-top:6px; font-size:.75rem; }
 .selected-task { padding:18px; border-radius:18px; }
 .selected-task .set-line strong { font-size:.875rem; }
 .selected-task .m-preview { margin:12px 0; }
 .selected-task .sheet { margin:14px 0; }
 .selected-task figcaption { font-size:.7rem; }
 .page-title { font-size:1.5rem; margin-top:20px; }
 .preview-card { padding:20px; }
 .practice-body { margin-top:18px; }
 .trainer-pc { padding:10px; border-radius:16px; }
 .pair { padding:15px 8px; gap:10px; }
 .cells .src { padding:8px 4px; font-size:.8rem; }
 .cells .tin { font-size:.85rem; padding:8px 4px; }
 .res-headline { font-size:1.75rem; }
 .studio-result-visual { grid-template-columns:108px 1fr; padding:16px; }
 .studio-accuracy { width:108px; height:108px; }
 .res-focus { padding:20px; border-radius:18px; }
 .dline { font-size:1.25rem; }
 .stats-compact .stat { padding:12px; }
 .site-footer { margin-top:26px; }
}
@media(max-width:359px) {
 .brand-name { font-size:.95rem; }
 .header-row { gap:5px; }
 .seg { padding:0 7px; }
 .lang-select { max-width:75px; padding-right:0; }
 .task-hero .hero-title { font-size:1.5rem; }
 .studio-result-visual { grid-template-columns:96px 1fr; }
 .studio-accuracy { width:96px; height:96px; }
}
@media(min-width:360px) and (max-width:560px) {
 .header-row { display:flex; flex-wrap:nowrap; gap:7px; }
 .brand { flex:0 0 auto; }
 .lane-nav { flex:0 0 auto; }
 .seg { padding:0 7px; }
 .lang-wrap { flex:0 1 auto; }
 .lang-select { max-width:70px; width:70px; padding-left:0; font-size:.7rem; }
}
@media(max-height:420px) {
 .vv-compact .m-top { padding:4px 0; }
 .vv-compact .m-card { padding:8px 0; }
 .vv-compact .m-src { padding:6px 10px; }
 .vv-compact .m-card .tin { min-height:48px; padding:8px 10px; font-size:1.125rem; }
 .vv-compact .m-bar .btn { min-height:44px; }
}
/* Value proof: explicit synthetic comparison, separate from live practice and history. */
.value-demo { padding:22px; background:#fff; border:1px solid #ded9ed; border-radius:22px; box-shadow:0 12px 35px #1b234007; }
.value-demo h2 { font-size:1.2rem; margin:8px 0 16px; }
.value-demo .eyebrow { display:block; }
.value-column-head { display:grid; grid-template-columns:1fr 1fr; padding:0 12px 8px; color:var(--muted); font-size:.75rem; }
.value-field { display:grid; grid-template-columns:1fr 1fr; position:relative; gap:6px 14px; padding:10px 12px; border-top:1px solid #eceaf2; }
.value-field-name { grid-column:1/-1; color:#5d6274; font-size:.7rem; font-weight:500; }
.value-field code { overflow-wrap:anywhere; min-width:0; font-size:.95rem; }
.value-field code:last-of-type { padding-right:12px; }
.value-verdict { position:absolute; right:4px; bottom:10px; font-weight:800; color:#963d27; }
.value-match .value-verdict { color:#286253; }
.value-demo del { color:#963d27; text-decoration:line-through 2px; background:#fff1e9; }
.value-demo mark { color:#963d27; background:#fff1e9; border-bottom:2px solid #963d27; }
.value-outcome { margin-top:12px; min-height:44px; color:#606579; font-size:.75rem; line-height:1.6; }
.value-outcome strong { display:block; color:#963d27; font-size:1rem; }
.value-outcome p { margin:4px 0 0; }
.value-demo-actions { display:flex; gap:8px; margin:10px 0; }
.value-demo-actions .btn { width:100%; min-height:44px; font-size:.8rem; }
.value-demo [hidden] { display:none; }
.value-start { width:100%; border:1px solid #59459b; color:#443379; background:#f5f2fc; min-height:44px; }
.value-steps { font-size:.7rem; color:#606579; margin:12px 0 0; text-align:center; }
@media(max-width:560px) {
 .task-hero { gap:16px; }
 .value-demo { padding:16px; border-radius:18px; }
 .value-demo h2 { font-size:1rem; margin-bottom:10px; }
 .value-field { padding:7px 10px; }
 .value-field code { font-size:.85rem; }
 .value-outcome { min-height:0; }
 .value-steps { font-size:.65rem; }
 .home-pc .selected-task .sheet-table { table-layout:fixed; }
 .home-pc .selected-task .sheet-table th,
 .home-pc .selected-task .sheet-table td { padding-left:4px; padding-right:4px; white-space:normal; overflow-wrap:anywhere; vertical-align:top; }
 .home-pc .selected-task .sheet-table .sheet-no { width:20px; }
}
/* Work courses reuse native trainers; only the journey and summary are new. */
.course-home{margin:40px 0 48px;padding:28px;border:1px solid #c9d7cd;border-radius:18px;background:#f2f6f1;min-width:0}
.course-heading{max-width:760px}.course-heading h2{font-size:clamp(1.55rem,3vw,2.15rem);line-height:1.3;letter-spacing:-.035em;margin:8px 0 12px}
.course-flow{font-size:.88rem;font-weight:650;color:#24513f}.course-home .field-row{max-width:520px;margin:20px 0}
.course-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.course-card{position:relative;min-width:0;background:#fff;border:1px solid #d7dfd6;border-radius:12px;padding:21px;display:flex;flex-direction:column;gap:10px}
.course-index{font-family:monospace;font-size:.78rem;color:#52635a}.course-card h3{font-size:1.25rem;margin:0}.course-card p{margin:0}.course-card .btn{margin-top:auto;min-height:44px}
.course-values{font-size:.83rem;padding:12px 0;border-top:1px solid #e3e8e1;line-height:1.8;overflow-wrap:anywhere}
.course-examples{margin:20px 0}.course-examples summary{min-height:44px;display:flex;align-items:center;cursor:pointer}.course-examples li{margin:8px 0;overflow-wrap:anywhere}
.course-home select{min-height:44px;max-width:100%}.course-saved-row{display:flex;align-items:center;gap:12px;justify-content:space-between;border-top:1px solid #d7dfd6;padding:12px 0}.course-saved-row a{min-width:0;overflow-wrap:anywhere;padding:10px 0}.course-saved-row .btn{flex-shrink:0}
.course-panel{background:#f2f6f1;border:1px solid #c9d7cd;border-radius:16px;padding:26px;margin:20px 0 28px;min-width:0}
.course-report h2{margin:0 0 10px;font-size:1.65rem}.course-kicker{color:#52635a;font-size:.85rem}.course-stages{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:12px;margin:20px 0}
.course-stage{background:#fff;border:1px solid #d7dfd6;border-radius:12px;padding:18px;min-width:0;overflow-wrap:anywhere}.course-stage h3{font-size:1rem;margin:0 0 16px}.course-stage h4{font-size:.8rem;margin:14px 0 6px;color:#52635a}.course-score{font-size:2.15rem;letter-spacing:-.04em;font-variant-numeric:tabular-nums;margin:0 0 15px}.course-score span{font-size:.75rem;letter-spacing:0;display:block;color:#52635a;margin-top:4px}
.course-metrics{margin:0}.course-metrics div{display:flex;justify-content:space-between;gap:8px;margin:6px 0;font-size:.83rem}.course-metrics dd{margin:0;font-weight:650}.course-errors{margin:0;padding-left:18px;font-size:.85rem}.course-note{line-height:1.65;font-size:.88rem;max-width:850px}.course-training-note{padding:9px 12px;background:#edf4ed;border-left:3px solid #2f694d;font-size:.86rem;margin:0 0 10px}.course-panel .actions .btn{min-height:44px;white-space:normal;text-align:center}
@media(max-width:700px){.course-cards{grid-template-columns:1fr}.course-card{padding:18px;gap:8px}.course-home{padding:20px;margin:28px 0}.course-panel{padding:18px}.course-saved-row{align-items:flex-start;flex-wrap:wrap}.course-heading h2{font-size:1.55rem}}
@media(max-width:360px){.course-home,.course-panel{padding:14px}.course-stage{padding:14px}.course-home .field-row{display:grid;gap:8px}.course-cards{gap:10px}.course-report h2{font-size:1.35rem}}
.course-stage .badge{white-space:normal;max-width:100%;line-height:1.5;overflow-wrap:anywhere}
.course-set-id{overflow-wrap:anywhere;color:#52635a}.course-privacy{max-width:850px;line-height:1.7}
.course-panel>button{margin:12px 12px 12px 0;max-width:100%;white-space:normal;min-height:44px}