@font-face {
  font-family: "Literata";
  src: url("/fonts/literata-cyrillic.woff2") format("woff2");
  font-display: swap;
  font-style: normal;
  font-weight: 400 800;
}

:root {
  --question-canvas: #f5f7f5;
  --question-paper: #ffffff;
  --question-ink: #172019;
  --question-muted: #5f6b64;
  --question-line: #dce3de;
  --question-green: #0b7a53;
  --question-green-dark: #086341;
  --question-green-soft: #e9f6ef;
  --question-yellow: #f1d751;
  --question-red-line: rgba(193, 79, 66, 0.36);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--question-canvas);
  color: var(--question-ink);
  font-family: "Segoe UI Variable Text", "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--question-green-dark);
}

.question-header,
.question-footer,
.question-page main {
  width: min(1160px, calc(100% - 48px));
  margin-inline: auto;
}

.question-header {
  min-height: 76px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  border-bottom: 1px solid var(--question-line);
}

.question-brand {
  color: var(--question-green);
  font-family: "Literata", Georgia, serif;
  font-size: 1.45rem;
  font-weight: 720;
  text-decoration: none;
}

.question-header nav,
.question-footer nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.question-header nav {
  justify-content: center;
}

.question-header nav a,
.question-footer nav a {
  color: var(--question-ink);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

.question-header nav a:hover,
.question-footer nav a:hover {
  color: var(--question-green);
}

.question-header-action {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 17px;
  border-radius: 8px;
  background: var(--question-green);
  color: #fff;
  font-weight: 750;
  text-decoration: none;
}

.question-header-action:hover,
.self-check button:hover,
.question-cta > a:hover {
  background: var(--question-green-dark);
}

.question-page main {
  padding-block: 24px 80px;
}

.question-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--question-muted);
  font-size: 0.86rem;
  overflow-x: auto;
  scrollbar-width: none;
  white-space: nowrap;
}

.question-breadcrumbs::-webkit-scrollbar {
  display: none;
}

.question-breadcrumbs a {
  color: inherit;
}

.question-hero {
  max-width: 1080px;
  padding: 54px 0 36px;
}

.question-kicker,
.section-label {
  margin: 0 0 12px;
  color: var(--question-green);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.question-hero h1 {
  max-width: 1080px;
  margin: 0;
  font-family: "Literata", Georgia, serif;
  font-size: clamp(2.55rem, 4.9vw, 4.65rem);
  font-weight: 620;
  letter-spacing: -0.025em;
  line-height: 1.04;
  text-wrap: balance;
}

.question-intro {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--question-muted);
  font-size: 1.16rem;
}

.answer-ledger {
  position: relative;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  min-height: 248px;
  overflow: hidden;
  border: 1px solid var(--question-line);
  border-radius: 12px;
  background-color: var(--question-paper);
  background-image: linear-gradient(to bottom, transparent 47px, rgba(220, 227, 222, 0.55) 48px);
  background-size: 100% 48px;
}

.answer-ledger::after {
  position: absolute;
  inset: 0 auto 0 91px;
  width: 2px;
  background: var(--question-red-line);
  content: "";
}

.answer-number {
  position: relative;
  z-index: 1;
  padding-top: 28px;
  color: var(--question-muted);
  font-family: "Literata", Georgia, serif;
  font-size: 1.1rem;
  text-align: center;
}

.answer-ledger > div:last-child {
  position: relative;
  z-index: 1;
  align-self: center;
  padding: 32px 52px;
}

.answer-label {
  margin: 0;
  color: var(--question-muted);
  font-size: 0.82rem;
  font-weight: 750;
}

.answer-value {
  display: inline;
  margin: 0;
  font-family: "Literata", Georgia, serif;
  font-size: clamp(3.4rem, 7vw, 6.4rem);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.08;
  background-image: linear-gradient(transparent 82%, var(--question-yellow) 82%);
}

.answer-copy {
  max-width: 780px;
  margin: 22px 0 0;
  font-size: 1.08rem;
}

.question-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 80px;
  align-items: start;
  margin-top: 84px;
}

.question-article {
  min-width: 0;
}

.question-article section {
  scroll-margin-top: 24px;
}

.question-article section + section {
  margin-top: 72px;
  padding-top: 68px;
  border-top: 1px solid var(--question-line);
}

.question-article h2,
.question-sources h2,
.question-cta h2 {
  margin: 0;
  font-family: "Literata", Georgia, serif;
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  font-weight: 620;
  letter-spacing: -0.02em;
  line-height: 1.1;
  text-wrap: balance;
}

.question-article section > p:not(.section-label) {
  max-width: 74ch;
  font-size: 1.07rem;
}

.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 30px 0;
  border: 1px solid var(--question-line);
  border-radius: 10px;
  background: var(--question-paper);
  overflow: hidden;
}

.comparison > div {
  min-width: 0;
  padding: 24px;
}

.comparison > div + div {
  border-left: 1px solid var(--question-line);
}

.comparison span {
  display: block;
  margin-bottom: 16px;
  color: var(--question-muted);
  font-family: "Literata", Georgia, serif;
  font-size: 1.8rem;
  font-weight: 680;
}

.comparison strong {
  display: block;
}

.comparison p {
  margin-bottom: 0;
  color: var(--question-muted);
}

.comparison-accent {
  background: var(--question-green-soft);
}

.comparison-accent span {
  color: var(--question-green);
}

.memory-line {
  padding-left: 20px;
  border-left: 3px solid var(--question-yellow);
}

.question-aside {
  position: sticky;
  top: 24px;
  padding: 24px;
  border-top: 4px solid var(--question-ink);
  border-bottom: 1px solid var(--question-line);
  background: var(--question-paper);
}

.aside-title {
  margin: 0;
  font-family: "Literata", Georgia, serif;
  font-size: 1.35rem;
  font-weight: 680;
  line-height: 1.2;
}

.question-aside ol {
  margin: 22px 0;
  padding-left: 23px;
}

.question-aside li + li {
  margin-top: 12px;
}

.question-aside > a {
  font-weight: 750;
}

.self-check form {
  margin-top: 28px;
}

.self-check fieldset {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  border: 0;
}

.self-check label {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  min-height: 56px;
  padding: 15px 16px;
  border: 1px solid var(--question-line);
  border-radius: 8px;
  background: var(--question-paper);
  cursor: pointer;
}

.self-check label:has(input:checked) {
  border-color: #79b99c;
  background: #f0f9f4;
}

.self-check label.is-correct {
  border-color: var(--question-green);
  background: var(--question-green-soft);
}

.self-check label.is-wrong {
  border-color: #c7786e;
  background: #fff5f4;
}

.self-check input {
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--question-green);
}

.self-check button,
.question-cta > a {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 18px;
  padding: 0 19px;
  border: 0;
  border-radius: 8px;
  background: var(--question-green);
  color: #fff;
  font: inherit;
  font-weight: 760;
  text-decoration: none;
  cursor: pointer;
}

.check-feedback {
  min-height: 1.6em;
  margin: 12px 0 0;
  font-weight: 700;
}

.check-feedback.is-correct {
  color: var(--question-green-dark);
}

.check-feedback.is-wrong,
.check-feedback.is-warning {
  color: #8f251b;
}

.question-sources {
  margin-top: 92px;
  padding-top: 68px;
  border-top: 1px solid var(--question-line);
}

.source-row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr) auto;
  gap: 24px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--question-line);
}

.source-row:first-of-type {
  margin-top: 28px;
  border-top: 1px solid var(--question-line);
}

.source-row > span {
  color: var(--question-muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.source-row p {
  margin: 0;
}

.source-row a {
  font-weight: 700;
  white-space: nowrap;
}

.source-date {
  margin-top: 18px;
  color: var(--question-muted);
  font-size: 0.88rem;
}

.question-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: center;
  margin-top: 88px;
  padding: 38px;
  border: 1px solid #c6dfd1;
  border-radius: 12px;
  background: var(--question-green-soft);
}

.question-cta p:not(.section-label) {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--question-muted);
}

.question-cta > a {
  margin-top: 0;
  white-space: nowrap;
}

.question-footer {
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-block: 26px;
  border-top: 1px solid var(--question-line);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.question-page :focus-visible {
  outline: 3px solid #9ed3b8;
  outline-offset: 3px;
}

@media (max-width: 840px) {
  .question-header {
    grid-template-columns: 1fr auto;
    padding-block: 14px;
  }

  .question-header nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    order: 3;
  }

  .question-content-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .question-aside {
    position: static;
    grid-row: 1;
  }

  .source-row {
    grid-template-columns: 110px minmax(0, 1fr);
  }

  .source-row a {
    grid-column: 2;
  }
}

@media (max-width: 600px) {
  .question-header,
  .question-footer,
  .question-page main {
    width: min(100% - 32px, 1160px);
  }

  .question-header {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .question-header-action {
    display: none;
  }

  .question-header nav {
    grid-row: 2;
    gap: 17px;
    padding-top: 4px;
  }

  .question-hero {
    padding: 48px 0 32px;
  }

  .question-hero h1 {
    font-size: 2.25rem;
  }

  .answer-ledger {
    grid-template-columns: 52px minmax(0, 1fr);
  }

  .answer-ledger::after {
    left: 51px;
  }

  .answer-number {
    font-size: 0.9rem;
  }

  .answer-ledger > div:last-child {
    padding: 28px 20px;
  }

  .answer-value {
    font-size: clamp(3rem, 18vw, 4.7rem);
  }

  .question-content-grid {
    margin-top: 58px;
  }

  .question-article section + section {
    margin-top: 54px;
    padding-top: 50px;
  }

  .comparison {
    grid-template-columns: 1fr;
  }

  .comparison > div + div {
    border-top: 1px solid var(--question-line);
    border-left: 0;
  }

  .source-row {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .source-row a {
    grid-column: 1;
  }

  .question-cta {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 26px 22px;
  }

  .question-cta > a {
    width: 100%;
  }

  .question-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}