:root {
  --navy-950: #061526;
  --navy-900: #07192f;
  --navy-800: #0c2848;
  --blue-700: #164f87;
  --yellow: #ffd328;
  --yellow-dark: #e6b800;
  --ink: #102033;
  --muted: #536276;
  --line: #dbe3ec;
  --panel: #f4f7fa;
  --white: #ffffff;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 30px;
  --shadow: 0 20px 55px rgba(7, 25, 47, 0.12);
  --content: min(1120px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 12px 16px;
  color: var(--navy-950);
  background: var(--yellow);
  border-radius: 8px;
  font-weight: 800;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1001;
  height: 4px;
  background: transparent;
}
.reading-progress span { display: block; width: 0; height: 100%; background: var(--yellow); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: var(--white);
  background: rgba(6, 21, 38, 0.96);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(14px);
}
.nav-shell {
  width: var(--content);
  min-height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.brand img { border-radius: 12px; }
.brand span { display: flex; flex-direction: column; line-height: 1.05; }
.brand strong { font-size: 0.82rem; letter-spacing: 0.1em; }
.brand small { color: var(--yellow); font-size: 0.72rem; font-weight: 900; letter-spacing: 0.34em; }
.primary-nav { display: flex; align-items: center; gap: 8px; }
.primary-nav a {
  padding: 10px 13px;
  color: #dce7f4;
  border-radius: 9px;
  font-size: 0.93rem;
  font-weight: 700;
  text-decoration: none;
}
.primary-nav a:hover, .primary-nav a:focus-visible { color: var(--navy-950); background: var(--yellow); outline: none; }
.primary-nav a[aria-current="page"] { color: var(--navy-950); background: var(--yellow); }
.menu-button { display: none; }

.hero {
  position: relative;
  min-height: 690px;
  overflow: hidden;
  display: grid;
  align-items: center;
  color: var(--white);
  background: var(--navy-950);
}
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 58% center; }
.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4,15,28,0.97) 0%, rgba(4,15,28,0.88) 35%, rgba(4,15,28,0.3) 70%, rgba(4,15,28,0.08) 100%),
    linear-gradient(0deg, rgba(4,15,28,0.78) 0%, transparent 35%);
}
.hero-content { position: relative; z-index: 2; width: var(--content); margin: auto; padding: 88px 0 76px; }
.eyebrow, .section-kicker {
  margin: 0 0 14px;
  color: var(--yellow);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3.2rem, 7vw, 6.7rem);
  line-height: 0.94;
  letter-spacing: -0.065em;
  text-wrap: balance;
}
.hero h1 span { color: var(--yellow); }
.hero-summary { max-width: 660px; margin: 28px 0 0; color: #e3ebf4; font-size: clamp(1.08rem, 1.8vw, 1.3rem); line-height: 1.6; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 11px;
  font-weight: 850;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, border 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: var(--navy-950); background: var(--yellow); }
.button-primary:hover { background: #ffe26a; }
.button-secondary { color: var(--white); border-color: rgba(255,255,255,0.35); background: rgba(6,21,38,0.45); }
.button-secondary:hover { border-color: var(--white); background: rgba(6,21,38,0.8); }
.hero-facts {
  max-width: 720px;
  margin: 50px 0 0;
  padding: 24px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255,255,255,0.22);
  list-style: none;
}
.hero-facts li { display: flex; flex-direction: column; gap: 2px; padding-right: 22px; }
.hero-facts strong { color: var(--yellow); font-size: 1.5rem; line-height: 1.2; }
.hero-facts span { color: #dce7f4; font-size: 0.88rem; }

.safety-ribbon {
  position: relative;
  z-index: 3;
  width: min(920px, calc(100% - 40px));
  margin: -36px auto 0;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  gap: 17px;
  color: var(--navy-950);
  background: var(--yellow);
  border-radius: 16px;
  box-shadow: 0 15px 40px rgba(7,25,47,0.24);
}
.safety-ribbon p { margin: 0; line-height: 1.5; }
.safety-icon {
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--yellow);
  background: var(--navy-950);
  border-radius: 50%;
  font-weight: 950;
  font-size: 1.35rem;
}

.article { padding: 54px 0 0; }
.content-shell { width: min(920px, calc(100% - 40px)); margin-inline: auto; }
.intro-copy { padding: 34px 0 72px; }
.intro-copy p { max-width: 820px; }
.direct-answer {
  margin: 0 0 30px;
  padding: 26px 28px 26px 31px;
  background: var(--panel);
  border-left: 5px solid var(--yellow);
  border-radius: 0 14px 14px 0;
  font-size: 1.12rem;
}
.content-section { padding: 76px 0; scroll-margin-top: 80px; }
.content-section:nth-of-type(even) { position: relative; }
.content-section:nth-of-type(even)::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0 calc((100vw - 100%) / -2);
  background: var(--panel);
}
.section-heading { max-width: 780px; margin-bottom: 28px; }
.section-kicker { color: var(--blue-700); }
.content-section h2 {
  margin: 0;
  color: var(--navy-950);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
  text-wrap: balance;
}
.content-section > p, .step-body p, .faq-answer p { color: #35465a; }
.content-section h3 { margin: 36px 0 12px; color: var(--navy-900); font-size: 1.35rem; line-height: 1.3; }
.content-section strong { color: var(--navy-950); }

.section-visual {
  margin: 30px 0 38px;
  padding: 0;
}
.visual-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 21 / 11;
  background: #dbe3ec;
  border-radius: 22px;
  box-shadow: 0 22px 55px rgba(7,25,47,0.14);
}
.visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}
.section-visual:hover .visual-frame img { transform: scale(1.018); }
.visual-corner {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 86px;
  height: 10px;
  background: var(--yellow);
  border-radius: 12px 0 0;
}
.section-visual figcaption {
  margin-top: 12px;
  padding: 0 3px;
  display: flex;
  justify-content: flex-start;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
}

.section-key-takeaways { padding-top: 56px; }
.takeaway-grid {
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  list-style: none;
}
.takeaway-grid li {
  min-height: 116px;
  padding: 20px;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 13px;
  align-items: start;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(7,25,47,0.05);
}
.check {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: var(--navy-950);
  background: var(--yellow);
  border-radius: 50%;
  font-weight: 950;
}

.table-scroll { margin: 30px 0 12px; overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 8px 28px rgba(7,25,47,0.06); }
table { width: 100%; min-width: 680px; border-collapse: collapse; background: var(--white); font-size: 0.95rem; }
th, td { padding: 16px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
thead th { color: var(--white); background: var(--navy-900); font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; }
tbody th { width: 34%; color: var(--navy-900); background: #f8fafc; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }

.section-how-do-you-change-a-tire {
  width: min(1180px, calc(100% - 40px));
  color: var(--white);
}
.section-how-do-you-change-a-tire::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0 calc((100vw - 100%) / -2);
  background:
    radial-gradient(circle at 12% 8%, rgba(22,79,135,0.55), transparent 28%),
    linear-gradient(145deg, #07192f 0%, #061526 56%, #0a223d 100%);
}
.section-how-do-you-change-a-tire .section-heading,
.section-how-do-you-change-a-tire > p { max-width: 920px; margin-left: auto; margin-right: auto; }
.section-how-do-you-change-a-tire .section-kicker { color: var(--yellow); }
.section-how-do-you-change-a-tire h2 { color: var(--white); }
.section-how-do-you-change-a-tire > p { color: #d7e2ee; }
.section-how-do-you-change-a-tire .section-visual-featured { max-width: 1040px; margin: 34px auto 44px; }
.section-how-do-you-change-a-tire .visual-frame { border: 1px solid rgba(255,255,255,0.15); box-shadow: 0 24px 70px rgba(0,0,0,0.3); }
.section-how-do-you-change-a-tire .section-visual figcaption { color: #aebdd0; }
.step-phase {
  position: relative;
  margin: 34px 0;
  padding: 30px;
  overflow: hidden;
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(255,255,255,0.13);
  border-radius: 28px;
  box-shadow: 0 22px 65px rgba(0,0,0,0.2);
}
.step-phase::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 115px;
  height: 7px;
  background: var(--yellow);
  border-radius: 0 0 0 10px;
}
.phase-header {
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 20px;
  align-items: start;
}
.phase-number {
  color: var(--yellow);
  font-size: 3.1rem;
  font-weight: 950;
  line-height: 1;
  letter-spacing: -0.08em;
}
.phase-range {
  color: var(--yellow);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.phase-header h3 {
  margin: 3px 0 5px;
  color: var(--white);
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.12;
}
.phase-header p { max-width: 740px; margin: 0; color: #bfcddd; }
.phase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.road-step {
  position: relative;
  min-width: 0;
  padding: 25px;
  color: var(--ink);
  background: var(--white);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 18px;
  box-shadow: 0 13px 32px rgba(0,0,0,0.16);
}
.road-step-top { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; }
.step-label {
  color: var(--blue-700);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.step-number {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--navy-950);
  background: var(--yellow);
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 950;
}
.road-step h3 { margin: 0 0 12px; color: var(--navy-950); font-size: 1.36rem; line-height: 1.25; }
.road-step p { color: #405166; }
.road-step p:last-child { margin-bottom: 0; }

.mistake-list {
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  list-style: none;
  counter-reset: mistakes;
}
.mistake-list li {
  counter-increment: mistakes;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  padding: 17px;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.mistake-list li::before {
  content: counter(mistakes);
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--navy-900);
  border-radius: 50%;
  font-weight: 900;
}

.faq-section { padding-bottom: 88px; }
.faq-card { margin: 12px 0; background: var(--white); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.faq-card summary {
  min-height: 72px;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--navy-900);
  cursor: pointer;
  font-weight: 850;
  list-style: none;
}
.faq-card summary::-webkit-details-marker { display: none; }
.faq-card summary:hover { background: #f8fafc; }
.faq-card[open] { border-color: #b8c7d7; box-shadow: 0 12px 32px rgba(7,25,47,0.08); }
.faq-card[open] summary { background: var(--navy-900); color: var(--white); }
.faq-icon { position: relative; flex: 0 0 24px; width: 24px; height: 24px; border-radius: 50%; background: var(--yellow); }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; inset: 11px 6px auto; height: 2px; background: var(--navy-950); }
.faq-icon::after { transform: rotate(90deg); transition: transform 180ms ease; }
.faq-card[open] .faq-icon::after { transform: rotate(0); }
.faq-answer { padding: 2px 22px 18px; }
.faq-answer p:last-child { margin-bottom: 0; }

.page-hero {
  padding: 92px 0 86px;
  color: var(--white);
  background:
    radial-gradient(circle at 78% 18%, rgba(255,211,40,0.17), transparent 25%),
    linear-gradient(135deg, var(--navy-950), var(--navy-800));
}
.page-hero-shell { width: min(920px, calc(100% - 40px)); margin: auto; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 38px; color: #b7c6d7; font-size: 0.85rem; }
.breadcrumbs a { color: var(--yellow); font-weight: 800; text-decoration: none; }
.page-hero h1 { max-width: 790px; margin: 0; font-size: clamp(2.8rem, 7vw, 5.7rem); line-height: 0.98; letter-spacing: -0.06em; text-wrap: balance; }
.page-hero p:not(.eyebrow) { max-width: 720px; margin: 24px 0 0; color: #dce7f2; font-size: 1.15rem; }
.not-found { min-height: 580px; display: grid; align-items: center; }
.not-found .button { margin-top: 30px; }
.support-content { padding: 78px 0 96px; }
.support-content > h2 { margin: 52px 0 14px; color: var(--navy-950); font-size: clamp(1.65rem, 3vw, 2.35rem); line-height: 1.16; letter-spacing: -0.03em; }
.support-content > h2:first-child { margin-top: 0; }
.support-content h3 { color: var(--navy-900); font-size: 1.25rem; }
.support-content p { max-width: 820px; color: #3d4d61; }
.support-content a { color: var(--blue-700); font-weight: 750; text-underline-offset: 3px; }
.guide-hero {
  width: var(--content);
  margin: 0 auto;
  padding: 70px 0 56px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: 54px;
  align-items: center;
}
.guide-page main { background: linear-gradient(180deg, #f3f7fb 0, #fff 680px); }
.guide-hero-copy .breadcrumbs { margin-bottom: 30px; color: #617188; }
.guide-hero-copy .breadcrumbs a { color: var(--blue-700); }
.guide-hero-copy .eyebrow { color: var(--blue-700); }
.guide-hero h1 { margin: 0; color: var(--navy-950); font-size: clamp(3rem, 6vw, 5.9rem); line-height: .96; letter-spacing: -.062em; text-wrap: balance; }
.guide-hero-copy > p:not(.eyebrow) { max-width: 660px; margin: 25px 0 0; color: #46576b; font-size: 1.14rem; line-height: 1.65; }
.article-meta { margin-top: 30px; padding-top: 20px; display: flex; flex-wrap: wrap; gap: 8px 22px; color: #627287; border-top: 1px solid #cad5e0; font-size: .82rem; font-weight: 750; }
.guide-hero-visual { margin: 0; overflow: hidden; background: var(--navy-950); border-radius: 24px; box-shadow: var(--shadow); }
.guide-hero-visual img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.guide-hero-visual figcaption { padding: 15px 18px 17px; color: #c6d2e0; font-size: .78rem; line-height: 1.5; }
.longform { width: min(880px, calc(100% - 40px)); padding: 54px 0 96px; }
.longform > p { color: #34465a; }
.longform > h2, .faq-section > h2 { margin: 62px 0 16px; color: var(--navy-950); font-size: clamp(1.8rem, 3.3vw, 2.65rem); line-height: 1.12; letter-spacing: -.04em; text-wrap: balance; }
.longform > h2:first-of-type { margin-top: 48px; }
.longform a { color: var(--blue-700); font-weight: 800; text-underline-offset: 3px; }
.longform .direct-answer { max-width: none; margin: 0 0 30px; padding: 26px 28px; color: var(--navy-950); background: #fff5bf; border: 1px solid #efd45b; border-left: 7px solid var(--yellow-dark); border-radius: 14px; font-size: 1.12rem; line-height: 1.65; }
.checklist { margin: 25px 0 30px; padding: 0; display: grid; gap: 12px; list-style: none; }
.checklist li { position: relative; padding: 15px 18px 15px 48px; color: #34465a; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.checklist li::before { content: "✓"; position: absolute; left: 16px; top: 16px; width: 22px; height: 22px; display: grid; place-items: center; color: var(--navy-950); background: var(--yellow); border-radius: 50%; font-size: .75rem; font-weight: 950; }
.faq-section { margin-top: 76px; padding-top: 20px; border-top: 1px solid var(--line); }
.faq-section .section-kicker { margin-top: 34px; color: var(--blue-700); }
.faq-section > h2 { margin-top: 0; }
.safety-callout { margin-top: 52px; padding: 26px; color: #dce7f2; background: var(--navy-900); border-radius: 16px; border-top: 5px solid var(--yellow); }
.safety-callout strong { color: var(--yellow); font-size: 1.08rem; }
.safety-callout p { margin: 7px 0 0; color: #dce7f2; }
.guide-hub-section { width: var(--content); }
.guide-hub-intro { max-width: 760px; color: #425268; }
.guide-card-grid { margin-top: 30px; display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.guide-card { grid-column: span 2; min-height: 220px; padding: 25px; display: flex; flex-direction: column; color: var(--navy-950); background: var(--panel); border: 1px solid var(--line); border-radius: 16px; text-decoration: none; transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease; }
.guide-card:nth-child(4) { grid-column: 2 / span 2; }
.guide-card:hover, .guide-card:focus-visible { transform: translateY(-4px); border-color: #aabaca; box-shadow: 0 18px 38px rgba(7,25,47,.1); }
.guide-card > span { color: var(--blue-700); font-size: .73rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.guide-card > strong { margin-top: 16px; font-size: 1.2rem; line-height: 1.25; }
.guide-card > p { margin: auto 0 0; color: #58687b; font-size: .9rem; line-height: 1.55; }
.tool-cluster { margin-top: 76px; padding-top: 48px; border-top: 1px solid var(--line); }
.tool-cluster > .section-kicker { color: var(--blue-700); }
.tool-cluster > h2 { margin: 0 0 16px; color: var(--navy-950); font-size: clamp(1.8rem, 3.3vw, 2.65rem); line-height: 1.12; letter-spacing: -.04em; text-wrap: balance; }
.tool-cluster > p { color: #425268; }
.tool-cluster .guide-card:nth-child(4) { grid-column: span 2; }
.plain-check-list { margin: 22px 0 0; padding: 0; display: grid; gap: 11px; list-style: none; }
.plain-check-list li { position: relative; padding-left: 34px; color: #35465a; }
.plain-check-list li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 23px; height: 23px; display: grid; place-items: center; color: var(--navy-950); background: var(--yellow); border-radius: 50%; font-size: 0.78rem; font-weight: 950; }
.contact-layout { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1.2fr); gap: 58px; align-items: start; }
.contact-layout h2 { margin-top: 0; font-size: 2rem; letter-spacing: -0.035em; }
.contact-note { margin-top: 34px; padding: 22px; background: #fff8d8; border: 1px solid #f3d45a; border-radius: 14px; }
.contact-note h3 { margin: 0 0 7px; }
.contact-note p { margin: 0; color: #4d472e; }
.contact-form { padding: 30px; background: var(--panel); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); }
.field-row { margin-bottom: 18px; }
.field-row label { display: block; margin-bottom: 6px; color: var(--navy-900); font-size: 0.9rem; font-weight: 850; }
.field-row input, .field-row select, .field-row textarea { width: 100%; min-height: 48px; padding: 11px 13px; color: var(--ink); background: var(--white); border: 1px solid #b8c5d3; border-radius: 10px; font: inherit; line-height: 1.4; }
.field-row textarea { resize: vertical; }
.field-row input:focus, .field-row select:focus, .field-row textarea:focus { border-color: var(--blue-700); outline: 3px solid rgba(22,79,135,0.16); }
.form-button { width: 100%; border: 0; cursor: pointer; font-size: 1rem; }
.form-help { margin: 12px 0 0; color: var(--muted); font-size: 0.82rem; line-height: 1.5; }

.site-footer { padding: 64px 0 26px; color: #c9d5e3; background: var(--navy-950); }
.footer-shell { width: var(--content); margin: auto; display: grid; grid-template-columns: 1.7fr repeat(3, 1fr); align-items: start; gap: 42px; }
.footer-brand-block p { max-width: 310px; margin: 20px 0 0; color: #99aabd; font-size: 0.9rem; }
.footer-links { display: flex; flex-direction: column; gap: 9px; }
.footer-links strong { margin-bottom: 5px; color: var(--white); font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; }
.footer-links a { color: #aebdce; font-size: 0.88rem; text-decoration: none; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--yellow); }
.footer-bottom { width: var(--content); margin: 48px auto 0; padding-top: 22px; display: flex; justify-content: space-between; gap: 20px; color: #7f92a8; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.82rem; }
.footer-bottom a { color: #aebdce; text-decoration: none; }

:focus-visible { outline: 3px solid var(--yellow); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}

@media (max-width: 820px) {
  :root { --content: min(100% - 28px, 1120px); }
  body { font-size: 16px; }
  .nav-shell { min-height: 68px; }
  .menu-button {
    width: 44px;
    height: 44px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    color: var(--white);
    background: transparent;
    border: 1px solid rgba(255,255,255,0.22);
    border-radius: 10px;
  }
  .menu-button span:not(.sr-only) { display: block; width: 100%; height: 2px; background: currentColor; }
  .primary-nav {
    position: absolute;
    top: 68px;
    left: 14px;
    right: 14px;
    padding: 10px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--navy-900);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 12px;
    box-shadow: var(--shadow);
  }
  .primary-nav.is-open { display: flex; }
  .hero { min-height: 720px; align-items: end; }
  .hero-image { object-position: 66% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(4,15,28,0.98) 0%, rgba(4,15,28,0.88) 62%, rgba(4,15,28,0.22) 100%); }
  .hero-content { padding: 200px 0 72px; }
  .hero h1 { max-width: 620px; font-size: clamp(3rem, 13vw, 5rem); }
  .hero-facts { grid-template-columns: 1fr; gap: 14px; }
  .hero-facts li { display: grid; grid-template-columns: 95px 1fr; align-items: baseline; }
  .safety-ribbon { margin-top: -26px; }
  .takeaway-grid, .mistake-list { grid-template-columns: 1fr; }
  .phase-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 36px; }
  .guide-hero { padding-top: 48px; grid-template-columns: 1fr; gap: 34px; }
  .guide-hero-copy { max-width: 720px; }
  .guide-card-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-card, .guide-card:nth-child(4) { grid-column: auto; }
  .footer-shell { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .brand strong { font-size: 0.7rem; }
  .brand small { font-size: 0.65rem; }
  .hero { min-height: 700px; }
  .hero-content { padding-top: 175px; }
  .hero h1 { font-size: clamp(2.75rem, 15vw, 4rem); }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .safety-ribbon { padding: 19px; align-items: flex-start; }
  .content-shell, .section-how-do-you-change-a-tire { width: min(100% - 28px, 920px); }
  .content-section { padding: 58px 0; }
  .direct-answer { padding: 22px; }
  .visual-frame { aspect-ratio: 4 / 3; border-radius: 16px; }
  .step-phase { padding: 19px; border-radius: 20px; }
  .phase-header { grid-template-columns: 52px 1fr; gap: 13px; }
  .phase-number { font-size: 2.35rem; }
  .road-step { padding: 21px; }
  .takeaway-grid li { min-height: 0; }
  .page-hero { padding: 66px 0 62px; }
  .page-hero-shell { width: min(100% - 28px, 920px); }
  .page-hero h1 { font-size: clamp(2.6rem, 14vw, 4.4rem); }
  .support-content { padding: 56px 0 72px; }
  .guide-hero { width: min(100% - 28px, 1120px); padding: 38px 0 42px; }
  .guide-hero h1 { font-size: clamp(2.7rem, 14vw, 4.5rem); }
  .guide-hero-visual { border-radius: 16px; }
  .longform { width: min(100% - 28px, 880px); padding: 38px 0 72px; }
  .longform .direct-answer { padding: 21px; }
  .longform > h2, .faq-section > h2 { margin-top: 48px; }
  .guide-card-grid { grid-template-columns: 1fr; }
  .guide-card { min-height: 185px; }
  .contact-form { padding: 20px; }
  .footer-shell { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
}