:root {
  --navy: #17346f;
  --navy-dark: #0d234c;
  --blue: #2463c7;
  --green: #147a42;
  --gold: #f4c542;
  --ink: #172033;
  --muted: #5e6a7e;
  --line: #d8e0ed;
  --soft: #f4f7fb;
  --white: #ffffff;
  --danger: #a9362a;
  --shadow: 0 14px 36px rgba(23, 52, 111, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Poppins", sans-serif;
  line-height: 1.72;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--blue);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.main-nav {
  min-height: 74px;
  padding: 14px max(22px, calc((100vw - 1280px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: var(--navy);
  color: var(--white);
  position: relative;
  z-index: 20;
}

.logo {
  color: var(--white);
  text-decoration: none;
  font-size: 1.32rem;
  font-weight: 800;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-links a {
  color: #eef4ff;
  text-decoration: none;
  font-size: 0.91rem;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--gold);
}

.nav-toggle {
  width: 42px;
  height: 42px;
  display: none;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 6px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font-size: 1.1rem;
}

.article-hero {
  min-height: 610px;
  display: flex;
  align-items: center;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: var(--white);
  background-image: url("/assets/images/z83-application-guide-hero.webp");
  background-size: cover;
  background-position: center;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(8, 27, 57, 0.72);
}

.hero-inner {
  width: min(1280px, calc(100% - 44px));
  margin: 0 auto;
  padding: 70px 0 78px;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
  font-size: 0.84rem;
  color: rgba(255, 255, 255, 0.78);
}

.breadcrumbs a {
  color: var(--white);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 13px;
  color: #ffe071;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.article-hero h1 {
  margin: 0 0 20px;
  max-width: 760px;
  font-size: 3.45rem;
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-lead {
  margin: 0;
  max-width: 720px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.13rem;
}

.hero-meta {
  margin: 25px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.86rem;
  font-weight: 600;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 11px 17px;
  text-decoration: none;
  font-weight: 800;
}

.button-primary {
  color: var(--navy-dark);
  background: var(--gold);
}

.button-primary:hover {
  background: #ffe071;
}

.button-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.58);
  background: rgba(255, 255, 255, 0.1);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
}

.guide-summary {
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.guide-summary-inner {
  width: min(1160px, calc(100% - 44px));
  margin: 0 auto;
  padding: 30px 0;
  display: grid;
  grid-template-columns: 1.1fr repeat(3, minmax(0, 0.7fr));
  gap: 24px;
  align-items: center;
}

.summary-intro strong {
  display: block;
  margin-bottom: 4px;
  color: var(--navy);
  font-size: 1.05rem;
}

.summary-intro p,
.summary-stat p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.summary-stat {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.summary-stat span {
  display: block;
  color: var(--green);
  font-size: 1.42rem;
  font-weight: 800;
  line-height: 1.2;
}

.article-shell {
  width: min(1160px, calc(100% - 44px));
  margin: 0 auto;
  padding: 58px 0 80px;
  display: grid;
  grid-template-columns: 230px minmax(0, 760px);
  justify-content: space-between;
  gap: 64px;
}

.article-toc {
  align-self: start;
  position: sticky;
  top: 24px;
  padding: 3px 22px 3px 0;
  border-right: 1px solid var(--line);
}

.article-toc strong {
  display: block;
  margin-bottom: 11px;
  color: var(--navy);
  font-size: 0.82rem;
  text-transform: uppercase;
}

.article-toc ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.article-toc li {
  margin: 8px 0;
  padding-left: 3px;
}

.article-toc a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 600;
}

.article-toc a:hover {
  color: var(--blue);
  text-decoration: underline;
}

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

.article-body > p:first-child {
  margin-top: 0;
  color: #324158;
  font-size: 1.08rem;
}

.article-body h2 {
  margin: 54px 0 15px;
  color: var(--navy);
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.article-body h3 {
  margin: 30px 0 10px;
  color: var(--ink);
  font-size: 1.23rem;
  line-height: 1.35;
  letter-spacing: 0;
}

.article-body p {
  margin: 0 0 18px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 22px;
  padding-left: 25px;
}

.article-body li {
  margin: 9px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.official-note,
.warning-note,
.privacy-note {
  margin: 28px 0;
  padding: 19px 21px;
  border-radius: 6px;
}

.official-note {
  border: 1px solid #b9dfc9;
  border-left: 5px solid var(--green);
  background: #eff9f3;
}

.warning-note {
  border: 1px solid #f2d99c;
  border-left: 5px solid #d79e16;
  background: #fff9e9;
}

.privacy-note {
  border: 1px solid #c9d8ee;
  border-left: 5px solid var(--blue);
  background: #f2f7ff;
}

.official-note strong,
.warning-note strong,
.privacy-note strong {
  display: block;
  margin-bottom: 5px;
  color: var(--navy-dark);
}

.official-note p,
.warning-note p,
.privacy-note p {
  margin: 0;
}

.check-list {
  list-style: none;
  padding-left: 0 !important;
}

.check-list li {
  min-height: 34px;
  position: relative;
  padding-left: 37px;
}

.check-list li::before {
  content: "\2713";
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  position: absolute;
  top: 2px;
  left: 0;
  border-radius: 50%;
  color: var(--white);
  background: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
}

.example-line {
  margin: 15px 0 21px;
  padding: 14px 17px;
  border-left: 3px solid var(--blue);
  background: var(--soft);
  color: #33425a;
  font-size: 0.94rem;
}

.guide-cta {
  margin: 42px 0;
  padding: 27px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  border-radius: 8px;
  color: var(--white);
  background: var(--navy);
}

.guide-cta h2,
.guide-cta h3 {
  margin: 0 0 5px;
  color: var(--white);
  font-size: 1.35rem;
}

.guide-cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.93rem;
}

.guide-cta .button {
  flex: 0 0 auto;
}

.mistake-list {
  list-style: none;
  padding-left: 0 !important;
}

.mistake-list li {
  padding: 15px 0 15px 35px;
  position: relative;
  border-bottom: 1px solid var(--line);
}

.mistake-list li::before {
  content: "!";
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  position: absolute;
  top: 17px;
  left: 0;
  border-radius: 50%;
  color: var(--white);
  background: var(--danger);
  font-size: 0.75rem;
  font-weight: 800;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  padding: 18px 36px 18px 0;
  position: relative;
  cursor: pointer;
  color: var(--navy-dark);
  font-weight: 700;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 5px;
  top: 16px;
  color: var(--blue);
  font-size: 1.4rem;
}

.faq-list details[open] summary::after {
  content: "\2212";
}

.faq-list details p {
  padding: 0 36px 18px 0;
  color: var(--muted);
}

.sources {
  margin-top: 58px;
  padding-top: 31px;
  border-top: 2px solid var(--navy);
}

.sources h2 {
  margin-top: 0;
}

.sources ul {
  padding-left: 21px;
}

.sources a {
  overflow-wrap: anywhere;
  font-weight: 600;
}

.source-credit {
  margin-top: 21px;
  padding: 14px 17px;
  border-radius: 6px;
  color: #3f4d62;
  background: var(--soft);
  font-size: 0.88rem;
}

.article-disclaimer {
  color: var(--muted);
  font-size: 0.83rem;
}

.main-footer {
  padding: 34px 22px;
  color: var(--white);
  background: var(--navy-dark);
  text-align: center;
}

.footer-links {
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: #ffe071;
  text-decoration: none;
  font-weight: 600;
}

.footer-links a:hover {
  text-decoration: underline;
}

.main-footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.86rem;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: grid;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    padding: 15px 22px 20px;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    background: var(--navy-dark);
    box-shadow: 0 14px 26px rgba(13, 35, 76, 0.22);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 10px 0;
  }

  .article-hero {
    min-height: 590px;
    background-position: 62% center;
  }

  .article-hero::before {
    background: rgba(8, 27, 57, 0.76);
  }

  .article-hero h1 {
    font-size: 2.65rem;
  }

  .guide-summary-inner {
    grid-template-columns: repeat(3, 1fr);
  }

  .summary-intro {
    grid-column: 1 / -1;
  }

  .summary-stat:first-of-type {
    padding-left: 0;
    border-left: 0;
  }

  .article-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .article-toc {
    position: static;
    padding: 0 0 22px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .article-toc ol {
    columns: 2;
    column-gap: 30px;
  }
}

@media (max-width: 620px) {
  .main-nav {
    min-height: 66px;
    padding: 11px 16px;
  }

  .logo {
    font-size: 1.08rem;
  }

  .article-hero {
    min-height: 610px;
    background-position: 68% center;
  }

  .article-hero::before {
    background: rgba(8, 27, 57, 0.8);
  }

  .hero-inner,
  .guide-summary-inner,
  .article-shell {
    width: min(100% - 32px, 1160px);
  }

  .hero-inner {
    padding: 48px 0 55px;
  }

  .breadcrumbs {
    margin-bottom: 22px;
  }

  .article-hero h1 {
    font-size: 2.15rem;
    line-height: 1.13;
  }

  .hero-lead {
    font-size: 1rem;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button {
    width: 100%;
  }

  .guide-summary-inner {
    padding: 24px 0;
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .summary-intro,
  .summary-stat {
    grid-column: auto;
  }

  .summary-stat {
    padding: 13px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .article-shell {
    padding: 39px 0 58px;
  }

  .article-toc ol {
    columns: 1;
  }

  .article-body h2 {
    margin-top: 43px;
    font-size: 1.65rem;
  }

  .article-body h3 {
    font-size: 1.14rem;
  }

  .official-note,
  .warning-note,
  .privacy-note {
    padding: 16px;
  }

  .guide-cta {
    padding: 22px;
    align-items: stretch;
    flex-direction: column;
  }

  .guide-cta .button {
    width: 100%;
  }
}

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