:root {
  --ink: #26312f;
  --paper: #f6f0e3;
  --paper-light: #fffdf7;
  --orange: #e96d38;
  --orange-dark: #c95024;
  --sage: #bdcabd;
  --line: rgba(38, 49, 47, .17);
  --muted: #66716e;
  --shadow: 0 28px 70px rgba(38, 49, 47, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 85% 10%, rgba(189, 202, 189, .45), transparent 28rem),
    var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.55;
}

button, input { font: inherit; }

.topbar,
main,
.site-footer {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.topbar {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand img { width: 38px; height: 38px; }
.topbar__label { color: var(--muted); font-size: 12px; }

.intro {
  min-height: 540px;
  display: grid;
  grid-template-columns: .86fr 1.14fr;
  align-items: center;
  gap: clamp(40px, 8vw, 110px);
  padding: 62px 0 52px;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--orange-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .17em;
  text-transform: uppercase;
}

h1, h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-weight: 500; line-height: .95; }
h1 { font-size: clamp(64px, 9vw, 118px); letter-spacing: -.065em; }
h1 span { color: var(--orange); }
h2 { font-size: clamp(40px, 5vw, 65px); letter-spacing: -.045em; }

.intro__lead { max-width: 530px; margin: 28px 0 16px; color: #46514e; font-size: clamp(17px, 2vw, 21px); }
.fineprint { margin: 0; color: var(--muted); font-size: 11px; }

.mini-certificate {
  position: relative;
  aspect-ratio: 1.414 / 1;
  padding: 17px;
  background: var(--paper-light);
  border: 1px solid rgba(38,49,47,.24);
  box-shadow: var(--shadow);
  transform: rotate(2deg);
}

.mini-certificate::before,
.mini-certificate::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 12px -10px -10px 12px;
  border: 1px solid rgba(38,49,47,.18);
  background: #e9dfcd;
}

.mini-certificate::after { inset: 23px -19px -19px 23px; background: #d7e0d5; }

.mini-certificate__inner {
  height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: clamp(28px, 5vw, 64px);
  border: 2px solid var(--ink);
}

.mini-certificate__kicker { color: var(--orange-dark); font-size: 11px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; }
.mini-certificate strong { margin: 15px 0 18px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(36px, 5vw, 68px); font-weight: 500; line-height: .88; letter-spacing: -.055em; }
.mini-certificate__line { width: 45%; height: 1px; margin-bottom: 10px; background: var(--ink); }
.mini-certificate small { color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.mini-certificate__seal { position: absolute; right: 8%; bottom: 10%; width: 84px; height: 84px; display: grid; place-content: center; color: white; background: var(--orange); border-radius: 50%; text-align: center; font-family: Georgia, "Times New Roman", serif; font-size: 22px; line-height: .85; transform: rotate(-8deg); }
.mini-certificate__seal small { color: white; font: 700 9px Arial, sans-serif; letter-spacing: .12em; }

.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps__item { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; font-weight: 700; }
.steps__item b { width: 27px; height: 27px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; }
.steps__item--active { color: var(--ink); }
.steps__item--active b { color: white; background: var(--ink); }
.steps__line { width: 55px; height: 1px; background: var(--line); }

.workbench { padding: 88px 0 100px; }
.workbench__heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; }
.progress { display: flex; align-items: baseline; gap: 9px; }
.progress strong { color: var(--orange-dark); font: 500 clamp(38px, 5vw, 62px)/1 Georgia, serif; }
.progress span { max-width: 70px; color: var(--muted); font-size: 11px; line-height: 1.2; text-transform: uppercase; }
.exercise-intro { max-width: 670px; margin: 30px 0 36px; color: var(--muted); font-size: 17px; }

.question-list fieldset { margin: 0; padding: 0; border: 0; }
.question-list legend { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.question-item { display: grid; grid-template-columns: 50px 1fr 30px; align-items: center; min-height: 82px; border-top: 1px solid var(--line); cursor: pointer; transition: background .18s ease, padding .18s ease; }
.question-item:last-child { border-bottom: 1px solid var(--line); }
.question-item:hover { padding-inline: 12px; background: rgba(255,255,255,.38); }
.question-item__number { color: var(--orange-dark); font: italic 18px Georgia, serif; }
.question-item__text { font-family: Georgia, "Times New Roman", serif; font-size: clamp(17px, 2vw, 21px); line-height: 1.25; }
.question-item input { position: absolute; opacity: 0; pointer-events: none; }
.question-item__check { width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid var(--ink); border-radius: 50%; }
.question-item__check::after { content: "✓"; opacity: 0; color: white; font-size: 13px; transform: scale(.5); transition: opacity .15s, transform .15s; }
.question-item:has(input:checked) { color: #727b78; }
.question-item:has(input:checked) .question-item__text { text-decoration: line-through; text-decoration-thickness: 1px; }
.question-item input:checked + .question-item__check { background: var(--ink); }
.question-item input:checked + .question-item__check::after { opacity: 1; transform: scale(1); }
.question-item:has(input:focus-visible) { outline: 3px solid rgba(233,109,56,.35); outline-offset: 2px; }
.question-item:has(input:disabled) { cursor: not-allowed; opacity: .46; }
.question-item:has(input:disabled):hover { padding-inline: 0; background: transparent; }

.exercise-finish { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-top: 36px; }
.exercise-finish p { margin: 0; color: var(--muted); font-size: 13px; }
.button { min-height: 55px; display: inline-flex; align-items: center; justify-content: center; gap: 32px; padding: 0 24px; border: 1px solid transparent; border-radius: 2px; cursor: pointer; font-weight: 800; transition: transform .16s, background .16s, opacity .16s; }
.button:hover:not(:disabled) { transform: translateY(-2px); }
.button--primary { color: white; background: var(--orange); }
.button--primary:hover:not(:disabled) { background: var(--orange-dark); }
.button:disabled { cursor: not-allowed; opacity: .38; }

.details,
.certificate-stage { padding: 88px 0 100px; }

.details__heading { max-width: 720px; margin-bottom: 54px; }
.details__heading > p:last-child,
.certificate-stage__heading > p { max-width: 570px; margin: 24px 0 0; color: var(--muted); font-size: 17px; }

.details-form { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 34px; padding: clamp(28px, 5vw, 58px); background: rgba(255,253,247,.72); border: 1px solid var(--line); box-shadow: var(--shadow); }
.field { display: flex; flex-direction: column; gap: 9px; }
.field--wide { grid-column: 1 / -1; }
.field > span { font-size: 12px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.field input { width: 100%; min-height: 57px; padding: 0 16px; color: var(--ink); background: var(--paper-light); border: 1px solid rgba(38,49,47,.32); border-radius: 0; }
.field input:focus { outline: 3px solid rgba(233,109,56,.28); border-color: var(--orange-dark); }
.field input[aria-invalid="true"] { border-color: #a52f21; }
.field small { color: var(--muted); font-size: 11px; }
.score-input { display: flex; align-items: center; border: 1px solid rgba(38,49,47,.32); background: var(--paper-light); }
.score-input:focus-within { outline: 3px solid rgba(233,109,56,.28); border-color: var(--orange-dark); }
.score-input input { border: 0; outline: 0 !important; font: 500 30px/1 Georgia, serif; }
.score-input b { flex: 0 0 auto; padding-right: 18px; color: var(--muted); }
.form-error { grid-column: 1 / -1; margin: 0; color: #8e291d; font-weight: 700; }
.details-form__actions { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 18px; padding-top: 16px; }
.button--secondary { color: var(--ink); border-color: var(--ink); background: transparent; }

.certificate-stage__heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 46px; }
.certificate-stage__heading > p { margin: 0; }
.certificate-wrap { padding: 26px; background: #ded8cb; overflow-x: auto; box-shadow: var(--shadow); }
.certificate { min-width: 900px; aspect-ratio: 1.414 / 1; padding: 16px; color: #202a28; background: #fffdf7; }
.certificate__frame { height: 100%; position: relative; display: flex; flex-direction: column; padding: 34px 44px 25px; border: 2px solid #26312f; box-shadow: inset 0 0 0 7px #fffdf7, inset 0 0 0 8px rgba(38,49,47,.26); overflow: hidden; }
.certificate__frame::before { content: "21"; position: absolute; right: -28px; top: 34px; color: rgba(189,202,189,.25); font: 500 230px/.7 Georgia, serif; letter-spacing: -.1em; pointer-events: none; }
.certificate__header { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; }
.certificate__brand { display: flex; align-items: center; gap: 10px; font-size: 10px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.certificate__brandmark { width: 32px; height: 32px; flex: 0 0 auto; }
.certificate__serial { color: #69736f; font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.certificate__body { position: relative; z-index: 1; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; max-width: 740px; margin: 0 auto; text-align: center; }
.certificate__eyebrow { margin: 10px 0 7px; color: var(--orange-dark); font-size: 9px; font-weight: 800; letter-spacing: .19em; text-transform: uppercase; }
.certificate h3 { margin: 0; font: 500 59px/.95 Georgia, serif; letter-spacing: -.055em; }
.certificate__declares { margin: 15px 0 4px; color: #66716e; font: italic 13px Georgia, serif; }
.certificate__name { min-width: 470px; max-width: 710px; margin: 0; padding: 2px 20px 5px; border-bottom: 1px solid #26312f; font: italic 500 34px/1.15 Georgia, serif; overflow-wrap: anywhere; }
.certificate__copy { max-width: 620px; margin: 10px 0 6px; font: 13px/1.45 Georgia, serif; }
.certificate__score { display: flex; align-items: baseline; gap: 5px; color: var(--orange-dark); }
.certificate__score strong { font: 500 42px/.9 Georgia, serif; }
.certificate__score span { font: 700 11px Arial, sans-serif; }
.certificate__verdict { margin: 5px 0 0; font-size: 8px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.certificate__footer { position: relative; display: grid; grid-template-columns: 1fr 1fr 94px; align-items: end; gap: 28px; padding-top: 15px; border-top: 1px solid rgba(38,49,47,.3); }
.certificate__meta { display: flex; flex-direction: column; gap: 5px; font: 11px Georgia, serif; }
.certificate__signature { display: flex; flex-direction: column; gap: 3px; text-align: center; }
.certificate__signature span { font: italic 25px Georgia, serif; }
.certificate__signature b { font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
.certificate__seal { width: 80px; height: 80px; position: absolute; right: 5px; bottom: -7px; display: grid; align-content: center; color: white; background: var(--orange); border: 3px double rgba(255,255,255,.85); border-radius: 50%; text-align: center; transform: rotate(-7deg); }
.certificate__seal span { font: 500 20px/1 Georgia, serif; }
.certificate__seal b { margin-top: 3px; font-size: 8px; line-height: 1; letter-spacing: .08em; text-transform: uppercase; }
.certificate__disclaimer { margin: 15px 0 0; color: #7a837f; font-size: 7px; letter-spacing: .05em; text-align: center; }
.certificate-actions { display: flex; justify-content: flex-end; gap: 16px; margin-top: 30px; }

.site-footer { min-height: 100px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.site-footer a { color: inherit; }
.steps__item--done b { color: white; background: var(--sage); border-color: var(--sage); }
.certificate__name--long { font-size: 28px; }
.certificate__name--very-long { font-size: 23px; }

@media (max-width: 760px) {
  .topbar__label { display: none; }
  .intro { min-height: auto; grid-template-columns: 1fr; gap: 48px; padding-top: 48px; }
  .mini-certificate { width: min(100%, 560px); }
  .steps { gap: 8px; }
  .steps__item { font-size: 0; gap: 0; }
  .steps__item b { font-size: 12px; }
  .steps__line { width: 36px; }
  .workbench { padding-top: 62px; }
  .workbench__heading { align-items: flex-start; flex-direction: column; }
  .question-item { grid-template-columns: 40px 1fr 30px; padding: 14px 0; }
  .question-item:hover { padding-inline: 6px; }
  .exercise-finish { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .details-form { grid-template-columns: 1fr; }
  .field--wide { grid-column: auto; }
  .field { grid-column: 1; }
  .details-form__actions { flex-direction: column-reverse; }
  .certificate-stage__heading { align-items: flex-start; flex-direction: column; }
  .certificate-wrap { margin-inline: -20px; padding: 14px 20px; }
  .certificate-actions { align-items: stretch; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

@page { size: A4 landscape; margin: 0; }

@media print {
  body { background: white; }
  body > :not(main),
  main > :not(#certificate-section),
  .certificate-stage__heading,
  .certificate-actions { display: none !important; }
  main, #certificate-section { width: 100%; margin: 0; padding: 0; }
  #certificate-section[hidden] { display: none !important; }
  .certificate-wrap { width: 297mm; height: 210mm; padding: 10mm; background: white; box-shadow: none; overflow: hidden; }
  .certificate { width: 277mm; min-width: 0; height: 190mm; padding: 5mm; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  .certificate__frame { padding: 8mm 11mm 5mm; }
}