:root {
  --ink: #111827;
  --muted: #596273;
  --paper: #f7f8f4;
  --surface: #ffffff;
  --line: #dfe4dc;
  --blue: #1456e8;
  --blue-dark: #0b369d;
  --lime: #d9ff00;
  --coral: #f06449;
  --max: 1180px;
  --radius: 8px;
  --shadow: 0 18px 48px rgba(17, 24, 39, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Manrope", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.72;
  letter-spacing: 0;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; letter-spacing: 0; }
button { color: inherit; }
h1, h2, h3, .button, .section-label, .hero-meta, .toc, dt {
  font-family: "Plus Jakarta Sans", "Manrope", Arial, sans-serif;
  letter-spacing: 0;
}
h1, h2, h3, p { overflow-wrap: anywhere; }
h2 { margin: 0; font-size: 38px; line-height: 1.16; }
h3 { margin: 0; font-size: 20px; line-height: 1.3; }
p { margin: 0; }

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 9999;
  height: 4px;
  background: transparent;
}
.reading-progress span { display: block; width: 0; height: 100%; background: var(--lime); }

.article-hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
  background: #18213a;
}
.article-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8, 14, 30, 0.92) 0%, rgba(8, 14, 30, 0.72) 48%, rgba(8, 14, 30, 0.2) 100%); }
.hero-inner { position: relative; z-index: 1; width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 150px 0 68px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 30px; font-size: 13px; font-weight: 700; color: rgba(255,255,255,.76); }
.breadcrumbs a:hover { color: var(--lime); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-bottom: 20px; font-size: 12px; font-weight: 800; text-transform: uppercase; }
.hero-meta span:first-child { color: var(--lime); }
.article-hero h1 { max-width: 920px; margin: 0; font-size: 64px; line-height: 1.04; font-weight: 800; letter-spacing: 0; }
.article-hero p { max-width: 820px; margin-top: 24px; color: rgba(255,255,255,.86); font-size: 20px; line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 34px; }
.lang-link { display: inline-flex; align-items: center; min-height: 46px; padding: 0 4px; border-bottom: 2px solid rgba(255,255,255,.42); font-weight: 800; }
.lang-link:hover { color: var(--lime); border-color: var(--lime); }

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
}
.button-accent { background: var(--lime); color: #101827; }
.button-accent:hover { background: #ecff75; }
.button-secondary { border-color: #cdd5c9; background: #fff; color: var(--ink); }
.button-secondary:hover { border-color: var(--blue); color: var(--blue); }

.article-shell { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 64px; padding: 70px 0 110px; }
.toc { position: sticky; top: 94px; align-self: start; display: grid; gap: 4px; padding: 18px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 700; }
.toc > span { margin-bottom: 8px; color: var(--muted); text-transform: uppercase; font-size: 11px; }
.toc a { padding: 8px 10px; border-left: 2px solid transparent; color: #60697a; line-height: 1.35; }
.toc a:hover, .toc a.is-active { border-left-color: var(--blue); color: var(--blue); background: #eef3ff; }
.article-content { min-width: 0; display: grid; gap: 92px; }

.answer-box { padding: 36px 38px; border-left: 6px solid var(--lime); background: var(--ink); color: #fff; box-shadow: var(--shadow); }
.answer-box > p { margin-top: 18px; font-size: 24px; line-height: 1.55; font-weight: 600; }
.section-label { display: inline-block; color: var(--blue); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.answer-box .section-label, .cta-band .section-label { color: var(--lime); }
.data-note { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 28px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.7); font-size: 13px; }
.data-note strong { color: #fff; }

.content-section { min-width: 0; }
.section-head { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 18px; align-items: start; margin-bottom: 32px; }
.section-head .section-label { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid #bbc6ba; border-radius: 50%; }
.section-head p { max-width: 760px; margin-top: 12px; color: var(--muted); }

.insight-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.insight-item { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 14px; padding: 26px 24px 26px 0; border-bottom: 1px solid var(--line); }
.insight-item:nth-child(odd) { padding-right: 34px; }
.insight-item:nth-child(even) { padding-left: 34px; border-left: 1px solid var(--line); }
.insight-item > span { color: var(--coral); font-family: "Plus Jakarta Sans", sans-serif; font-size: 11px; font-weight: 800; }
.insight-item p { margin-top: 8px; color: var(--muted); font-size: 15px; line-height: 1.65; }

.compare-tools { display: grid; grid-template-columns: minmax(0, 1fr) 44px auto; gap: 10px; align-items: end; margin: 0 0 18px 74px; }
.compare-tools label { display: grid; gap: 7px; color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.compare-tools input { width: 100%; min-height: 46px; padding: 10px 14px; border: 1px solid #cbd3ca; border-radius: 4px; background: #fff; color: var(--ink); }
.compare-tools input:focus { outline: 3px solid rgba(20,86,232,.16); border-color: var(--blue); }
.icon-button { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid #cbd3ca; border-radius: 4px; background: #fff; cursor: pointer; font-size: 24px; }
.icon-button:hover { color: var(--blue); border-color: var(--blue); }
.compare-tools > span { min-width: 44px; height: 44px; display: grid; place-items: center; background: var(--ink); color: #fff; border-radius: 4px; font-weight: 800; }
.compare-list { display: grid; gap: 12px; }
.compare-card { display: grid; grid-template-columns: 46px minmax(180px, .85fr) minmax(0, 1.4fr) 34px; gap: 18px; align-items: start; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 8px 22px rgba(17,24,39,.04); }
.compare-card[hidden] { display: none; }
.compare-rank { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: #edf2ff; color: var(--blue); font-family: "Plus Jakarta Sans", sans-serif; font-size: 12px; font-weight: 800; }
.compare-main .eyebrow { color: var(--coral); font-size: 11px; font-weight: 800; text-transform: uppercase; }
.compare-main h3 { margin-top: 4px; }
.compare-main p { margin-top: 8px; color: var(--muted); font-size: 14px; line-height: 1.55; }
.compare-card dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 18px; margin: 0; }
.compare-card dl div { min-width: 0; }
.compare-card dt { color: #788191; font-size: 10px; font-weight: 800; text-transform: uppercase; }
.compare-card dd { margin: 3px 0 0; font-size: 13px; line-height: 1.5; }
.text-link { display: inline-flex; align-items: center; gap: 5px; color: var(--blue); font-size: 13px; font-weight: 800; }
.text-link:hover { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 4px; }
.compare-card > .text-link { width: 34px; height: 34px; justify-content: center; border: 1px solid #d5ddd2; border-radius: 50%; font-size: 0; }
.compare-card > .text-link span { font-size: 16px; }

.detail-list { display: grid; border-top: 1px solid var(--line); }
.detail-item { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 20px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.detail-number { color: var(--coral); font-family: "Plus Jakarta Sans", sans-serif; font-size: 12px; font-weight: 800; }
.detail-item p { margin: 10px 0 12px; color: #4e5868; }

.split-section { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(260px, .7fr); gap: 42px; align-items: start; }
.step-list { list-style: none; display: grid; gap: 12px; padding: 0; margin: 0; }
.step-list li { display: grid; grid-template-columns: 48px 1fr; gap: 16px; padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.step-list li > span { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: var(--lime); font-family: "Plus Jakarta Sans", sans-serif; font-size: 11px; font-weight: 800; }
.step-list p { margin-top: 6px; color: var(--muted); font-size: 14px; }
.mistake-panel { position: sticky; top: 94px; padding: 26px; border-top: 5px solid var(--coral); border-radius: var(--radius); background: #fff1ed; }
.mistake-panel h2 { font-size: 23px; }
.mistake-panel ul { display: grid; gap: 12px; margin: 18px 0 0; padding-left: 20px; color: #5f4038; font-size: 14px; }

.checklist-section { padding: 34px; border: 1px solid #cbd3ca; border-radius: var(--radius); background: #eef2e8; }
.checklist { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.checklist label { position: relative; display: grid; grid-template-columns: 28px 1fr; gap: 12px; align-items: center; min-height: 64px; padding: 13px; border: 1px solid #d5dccf; border-radius: 6px; background: #fff; cursor: pointer; font-weight: 700; line-height: 1.4; }
.checklist input { position: absolute; opacity: 0; pointer-events: none; }
.checkmark { width: 24px; height: 24px; display: grid; place-items: center; border: 2px solid #9aa599; border-radius: 4px; }
.checklist input:checked + .checkmark { border-color: var(--blue); background: var(--blue); }
.checklist input:checked + .checkmark::after { content: "✓"; color: #fff; font-size: 15px; font-weight: 800; }
.checklist label:has(input:checked) { border-color: #9bb4f3; background: #f2f6ff; }
.checklist-footer { display: flex; justify-content: space-between; align-items: center; gap: 18px; margin-top: 22px; }
.check-progress { flex: 1; font-size: 13px; font-weight: 800; }
.check-progress i { display: block; width: 100%; height: 6px; margin-top: 8px; overflow: hidden; background: #d7ded2; border-radius: 3px; }
.check-progress b { display: block; width: 0; height: 100%; background: var(--blue); }

.cta-band { display: flex; justify-content: space-between; align-items: center; gap: 36px; padding: 42px; border-radius: var(--radius); background: var(--blue-dark); color: #fff; }
.cta-band h2 { margin-top: 8px; font-size: 34px; }
.cta-band p { max-width: 650px; margin-top: 12px; color: rgba(255,255,255,.76); }
.cta-band .button { flex: 0 0 auto; }

.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; display: grid; grid-template-columns: 1fr 38px; gap: 16px; align-items: center; padding: 22px 0; border: 0; background: transparent; text-align: left; cursor: pointer; font-weight: 800; }
.faq-icon { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid #cbd3ca; border-radius: 50%; color: var(--blue); font-size: 20px; }
.faq-question[aria-expanded="true"] .faq-icon { background: var(--blue); color: #fff; transform: rotate(45deg); }
.faq-answer { height: 0; overflow: hidden; transition: height .25s ease; }
.faq-answer p { padding: 0 56px 24px 0; color: var(--muted); }

.sources-section ul { list-style: none; display: grid; gap: 9px; padding: 0; margin: 0; }
.sources-section li { display: grid; grid-template-columns: 1fr 38px; gap: 16px; align-items: center; padding: 15px 16px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.sources-section li div { display: grid; }
.sources-section li span { color: var(--muted); font-size: 12px; }
.sources-section li > a { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; background: #edf2ff; color: var(--blue); font-weight: 800; }
.editorial-note { margin-top: 18px; padding-left: 14px; border-left: 3px solid var(--lime); color: var(--muted); font-size: 13px; }

@media (max-width: 1020px) {
  .article-hero { min-height: 620px; }
  .article-hero h1 { font-size: 50px; }
  .article-shell { grid-template-columns: 1fr; gap: 32px; }
  .toc { position: static; display: flex; flex-wrap: wrap; gap: 4px; padding: 10px 0 20px; }
  .toc > span { width: 100%; }
  .toc a { border-left: 0; border-bottom: 2px solid transparent; }
  .toc a:hover, .toc a.is-active { border-bottom-color: var(--blue); }
  .split-section { grid-template-columns: 1fr; }
  .mistake-panel { position: static; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  h2 { font-size: 30px; }
  .article-hero { min-height: 660px; }
  .article-hero > img { object-position: 58% center; }
  .hero-shade { background: rgba(8,14,30,.76); }
  .hero-inner { width: min(calc(100% - 32px), var(--max)); padding: 120px 0 42px; }
  .breadcrumbs { margin-bottom: 18px; }
  .article-hero h1 { font-size: 40px; line-height: 1.08; }
  .article-hero p { font-size: 17px; }
  .article-shell { width: min(calc(100% - 32px), var(--max)); padding: 32px 0 74px; }
  .article-content { gap: 68px; }
  .answer-box { padding: 26px 22px; }
  .answer-box > p { font-size: 20px; }
  .section-head { grid-template-columns: 42px minmax(0,1fr); gap: 12px; }
  .section-head .section-label { width: 40px; height: 40px; }
  .insight-list { grid-template-columns: 1fr; }
  .insight-item, .insight-item:nth-child(odd), .insight-item:nth-child(even) { padding: 22px 0; border-left: 0; }
  .compare-tools { margin-left: 0; grid-template-columns: minmax(0,1fr) 44px auto; }
  .compare-card { grid-template-columns: 40px minmax(0,1fr) 34px; padding: 18px; }
  .compare-card dl { grid-column: 2 / -1; grid-template-columns: 1fr; padding-top: 12px; border-top: 1px solid var(--line); }
  .detail-item { grid-template-columns: 40px minmax(0,1fr); gap: 12px; }
  .checklist-section { padding: 24px 18px; }
  .checklist { grid-template-columns: 1fr; }
  .checklist-footer { align-items: stretch; flex-direction: column; }
  .cta-band { align-items: stretch; flex-direction: column; padding: 28px 22px; }
  .cta-band h2 { font-size: 28px; }
}

@media (max-width: 430px) {
  .article-hero h1 { font-size: 34px; }
  .hero-meta { gap: 7px 12px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .lang-link { justify-content: center; }
  .compare-tools { grid-template-columns: 1fr 44px; }
  .compare-tools > span { grid-column: 1 / -1; justify-self: start; }
  .compare-card { grid-template-columns: 36px minmax(0,1fr); gap: 12px; }
  .compare-card > .text-link { grid-column: 2; }
  .compare-card dl { grid-column: 1 / -1; }
  .section-head { grid-template-columns: 1fr; }
  .section-head .section-label { width: 38px; height: 38px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}