:root {
  --ink: #1d2433;
  --muted: #5a6275;
  --line: #d9dde5;
  --bg: #fbfaf7;
  --card: #ffffff;
  --accent: #0f6e6a;
  --accent-dark: #0a4f4c;
  --accent-soft: #e3f1ef;
  --warn: #8a4b00;
  --warn-soft: #fff3df;
  --ok: #1d6b2f;
  --ok-soft: #e6f4e8;
  --err: #a1251b;
  --err-soft: #fdeceb;
  --radius: 10px;
  --max: 980px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif; color: var(--ink); background: var(--bg); }
a { color: var(--accent-dark); text-underline-offset: 2px; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0.4em 0 0.5em; letter-spacing: -0.01em; }
h2 { font-size: 1.4rem; line-height: 1.25; margin: 1.8em 0 0.6em; }
h3 { font-size: 1.1rem; margin: 1.4em 0 0.4em; }
p, ul, ol { margin: 0 0 1em; }
li { margin-bottom: 0.35em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 8px; top: 8px; background: #fff; padding: 8px; z-index: 10; }
:focus-visible { outline: 3px solid #f0b429; outline-offset: 2px; }

/* Top notice: private service + free official preparation + beta */
.notice { background: var(--ink); color: #fff; font-size: 0.9rem; }
.notice .wrap { padding-top: 8px; padding-bottom: 8px; }
.notice a { color: #fff; }
.beta-pill { display: inline-block; background: var(--warn-soft); color: var(--warn); border: 1px solid #f0c98a; border-radius: 999px; padding: 2px 10px; font-size: 0.85rem; font-weight: 600; }

header.site { border-bottom: 1px solid var(--line); background: #fff; }
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px; padding-top: 12px; padding-bottom: 12px; }
.brand { font-weight: 800; font-size: 1.25rem; color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: 8px; }
.brand svg { width: 28px; height: 28px; }
nav.main ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 0; padding: 0; }
nav.main a { text-decoration: none; font-size: 0.95rem; }
nav.main a[aria-current="page"] { font-weight: 700; text-decoration: underline; }

main { padding: 8px 0 48px; }
.lead { font-size: 1.15rem; color: #2f3747; }
.small { font-size: 0.9rem; }
.muted { color: var(--muted); }
.hint { font-size: 0.88rem; color: var(--muted); }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin: 0 0 16px; }
.callout { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 14px 18px; border-radius: 0 var(--radius) var(--radius) 0; margin: 0 0 18px; }
.callout-warn { border-left-color: #d98b1e; background: var(--warn-soft); }
.callout p:last-child, .card p:last-child { margin-bottom: 0; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: 16px; }
.free-vs-paid h3 { margin-top: 0; }

.btn, button.btn { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 11px 18px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--accent-dark); color: #fff; }
.btn.secondary, button.secondary { background: #fff; color: var(--accent-dark); border: 1px solid var(--accent); }
.btn.secondary:hover { background: var(--accent-soft); color: var(--accent-dark); }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0; }
button { font: inherit; }

.price { font-size: 1.6rem; font-weight: 800; margin: 0.2em 0; }
.price s { font-size: 1rem; font-weight: 400; color: var(--muted); }
.offers { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.offer h3 { margin-top: 0; }

table { border-collapse: collapse; width: 100%; margin: 0 0 1em; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 7px 9px; text-align: left; vertical-align: top; }
th { background: #f1f3f6; }
.table-wrap { overflow-x: auto; }

details { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin: 0 0 10px; background: #fff; }
summary { cursor: pointer; font-weight: 600; }

/* Forms (also the shared checkout form) */
.field { display: block; margin: 0 0 12px; }
.field span { display: block; font-weight: 600; margin-bottom: 4px; font-size: 0.95rem; }
input[type=text], input[type=email], input[type=number], input[type=date], select, textarea { width: 100%; max-width: 100%; padding: 9px 10px; border: 1px solid #b9c0cc; border-radius: 6px; font: inherit; background: #fff; }
textarea { min-height: 80px; }
.check { display: flex; gap: 10px; align-items: flex-start; margin: 10px 0; }
.check input { margin-top: 5px; }
fieldset.field-group { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin: 0 0 14px; }
legend { font-weight: 700; padding: 0 4px; }
.status { padding: 10px 12px; border-radius: 6px; }
.status.ok { background: var(--ok-soft); color: var(--ok); }
.status.err { background: var(--err-soft); color: var(--err); }
.checkout-form { max-width: 640px; }
.pay-button { background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 13px 20px; font-weight: 700; cursor: pointer; width: 100%; margin: 10px 0; }
.pay-button:disabled { opacity: 0.55; cursor: not-allowed; }
.product-choice label { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; margin-bottom: 8px; background: #fff; cursor: pointer; }
.product-choice input { margin-top: 5px; }

/* Practice test */
.quiz-q { font-size: 1.15rem; font-weight: 700; margin: 0 0 12px; }
.opts { list-style: none; padding: 0; margin: 0 0 12px; }
.opts li { margin: 0 0 8px; }
.opts button { width: 100%; text-align: left; background: #fff; border: 1px solid #b9c0cc; border-radius: 8px; padding: 11px 14px; cursor: pointer; color: var(--ink); }
.opts button:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.opts button.good { border-color: var(--ok); background: var(--ok-soft); }
.opts button.bad { border-color: var(--err); background: var(--err-soft); }
.opts button:disabled { cursor: default; }
.evidence { font-size: 0.92rem; border-left: 3px solid var(--line); padding: 4px 0 4px 12px; color: #333; margin: 8px 0; }
.evidence q { font-style: italic; }
.progress-line { font-size: 0.9rem; color: var(--muted); }
.kind-tag { display: inline-block; font-size: 0.78rem; border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; margin-right: 6px; color: var(--muted); }

/* Trainer area */
.tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 18px; border-bottom: 1px solid var(--line); }
.tabs button { background: none; border: 0; border-bottom: 3px solid transparent; padding: 8px 10px; cursor: pointer; color: var(--muted); font-weight: 600; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.panel[hidden] { display: none; }
.sheet { background: #fff; border: 1px solid var(--line); padding: 24px; margin: 16px 0; }
.sheet h2 { margin-top: 0; }
.sheet ol.exam { padding-left: 1.6em; }
.sheet ol.exam > li { break-inside: avoid; margin-bottom: 12px; }
.sheet ol.exam ul { list-style: none; padding-left: 0; margin: 4px 0 0; }
.grid-answers { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 4px 12px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.95rem; }
.card-q { font-size: 1.25rem; font-weight: 700; }
.timer { font-variant-numeric: tabular-nums; font-size: 1.4rem; font-weight: 700; }
.points li { list-style: none; margin-left: -1.2em; }
.screen-hidden { display: none; }
.charte { background: #f6f7f9; border-radius: 8px; padding: 12px 14px; font-size: 0.95rem; }

footer.site { border-top: 1px solid var(--line); background: #fff; padding: 24px 0 32px; font-size: 0.9rem; color: var(--muted); }
footer.site ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 18px; }

/* Lecture B2 sets (sample page + trainer area) */
.b2-context { background: #f6f7f9; border-radius: 8px; padding: 10px 14px; margin: 0 0 12px; font-size: 0.95rem; }
.b2-text { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 12px 0; margin: 0 0 12px; }
.b2-p { position: relative; padding-left: 2.4em; text-align: justify; hyphens: auto; }
.b2-n { position: absolute; left: 0; width: 1.8em; text-align: right; font-size: 0.8rem; color: var(--muted); font-variant-numeric: tabular-nums; top: 0.2em; }
.b2-item { padding-left: 3.4em; }
.b2-h { font-size: 1rem; margin: 1em 0 0.5em; }
.b2-sub { font-weight: 700; margin: 0.8em 0 0.3em; }
.b2-vocab { border: 1px solid var(--line); border-radius: 8px; padding: 8px 14px; margin: 0 0 12px; }
.b2-vocab h3 { margin-top: 0.3em; }
.b2-vocab dl { display: grid; grid-template-columns: minmax(7em, max-content) 1fr; gap: 2px 12px; margin: 0; font-size: 0.95rem; }
.b2-vocab dt { font-weight: 700; }
.b2-vocab dd { margin: 0; }
ol.b2-q > li { break-inside: avoid; margin-bottom: 10px; }
ol.b2-q ul { list-style: none; padding-left: 0; margin: 4px 0 0; }
.b2-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 4px 12px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 0.95rem; }
.product-choice label.addon { margin-left: 1.4em; }
@media (max-width: 600px) { .b2-vocab dl { grid-template-columns: 1fr; } .b2-p { text-align: left; } .product-choice label.addon { margin-left: 0.6em; } }

@media (max-width: 600px) {
  body { font-size: 16px; }
  h1 { font-size: 1.6rem; }
  .card { padding: 14px; }
  .sheet { padding: 14px; }
}

@media print {
  body { background: #fff; font-size: 11pt; }
  .notice, header.site, footer.site, nav, .no-print, .tabs, .btn-row, .card.controls { display: none !important; }
  main { padding: 0; }
  .wrap { max-width: none; padding: 0; }
  .sheet { border: 0; padding: 0; margin: 0; }
  .print-break { break-before: page; }
  body.print-only-exam .sheet:not(.sheet-exam), body.print-only-key .sheet:not(.sheet-key), body.print-only-progress .sheet:not(.sheet-progress), body.print-only-cards .sheet:not(.sheet-cards), body.print-only-b2 .sheet:not(.sheet-b2), body.print-only-b2key .sheet:not(.sheet-b2key) { display: none !important; }
  body.print-only-b2 main h1, body.print-only-b2 main > .wrap > p, body.print-only-b2key main h1, body.print-only-b2key main > .wrap > p, body.print-mode #p-b2 .card.controls { display: none !important; }
  .sheet-b2key { break-before: page; }
  body.print-mode main h1, body.print-mode #login, body.print-mode #licence-line, body.print-mode #space > .callout, body.print-mode #int-card, body.print-mode #int-summary { display: none !important; }
  body.print-only-cards .sheet-cards.screen-hidden { display: block !important; }
  .panel[hidden] { display: none !important; }
  a { color: #000; text-decoration: none; }
}