:root {
  color-scheme: light;
  --bg: #f4f6fa;
  --paper: #ffffff;
  --surface-soft: #fbfcfe;
  --ink: #111827;
  --ink-soft: #526071;
  --strong: #17233b;
  --deep-surface: #17233b;
  --on-deep: #ffffff;
  --blue: #2457c5;
  --blue-dark: #173f99;
  --blue-soft: #eef3fc;
  --line: #dfe5ee;
  --line-strong: #cbd4e1;
  --header-bg: rgba(255, 255, 255, .94);
  --header-border: rgba(203, 212, 225, .75);
  --card-border: rgba(203, 212, 225, .76);
  --body-glow: rgba(36, 87, 197, .10);
  --hero-orb: rgba(36, 87, 197, .055);
  --featured-border: #cbd9f5;
  --status-border: #c8d6f2;
  --usu-start: #ffffff;
  --usu-end: #f9fbff;
  --primary-ink: #ffffff;
  --footer-text: #dbe4f2;
  --footer-muted: #b8c3d4;
  --footer-border: rgba(255, 255, 255, .13);
  --focus: rgba(36, 87, 197, .36);
  --shadow: 0 16px 42px rgba(23, 35, 59, .08);
  --shadow-small: 0 8px 24px rgba(23, 35, 59, .06);
  --radius: 20px;
  --radius-small: 13px;
  --shell: 1100px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #07101f;
  --paper: #0d1728;
  --surface-soft: #111d30;
  --ink: #f3f6fc;
  --ink-soft: #b4c0d1;
  --strong: #edf3ff;
  --deep-surface: #162642;
  --on-deep: #f8fbff;
  --blue: #78a8ff;
  --blue-dark: #a9c6ff;
  --blue-soft: #142747;
  --line: #263752;
  --line-strong: #3a4c69;
  --header-bg: rgba(7, 16, 31, .94);
  --header-border: rgba(58, 76, 105, .72);
  --card-border: rgba(58, 76, 105, .72);
  --body-glow: rgba(83, 133, 238, .14);
  --hero-orb: rgba(83, 133, 238, .08);
  --featured-border: #36558c;
  --status-border: #36558c;
  --usu-start: #0d1728;
  --usu-end: #101d32;
  --primary-ink: #07101f;
  --footer-text: #e4ebf7;
  --footer-muted: #acb9cd;
  --footer-border: rgba(255, 255, 255, .15);
  --focus: rgba(120, 168, 255, .48);
  --shadow: 0 18px 46px rgba(0, 0, 0, .30);
  --shadow-small: 0 9px 26px rgba(0, 0, 0, .22);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% -120px, var(--body-glow), transparent 420px),
    var(--bg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
a { color: inherit; }
button { font: inherit; }
img { max-width: 100%; height: auto; }

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  transform: translateY(-150%);
  padding: 9px 14px;
  color: var(--ink);
  background: var(--paper);
  border: 2px solid var(--blue);
  border-radius: 9px;
  font-weight: 700;
  text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 5px;
}

.page { min-height: 100vh; display: flex; flex-direction: column; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.nav-shell {
  position: relative;
  max-width: var(--shell);
  min-height: 70px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -.01em;
  text-decoration: none;
  white-space: nowrap;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--on-deep);
  background: var(--deep-surface);
  border-radius: 9px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .07em;
}
.brand-name { font-size: .98rem; }
.header-controls {
  display: flex;
  align-items: center;
  gap: 11px;
}
.primary-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}
.primary-nav a {
  color: var(--ink-soft);
  font-size: .88rem;
  font-weight: 650;
  text-decoration: none;
  transition: color .16s ease;
}
.primary-nav a:hover { color: var(--blue); }
.primary-nav .nav-contact {
  padding: 8px 14px;
  color: var(--on-deep);
  background: var(--deep-surface);
  border-radius: 8px;
}
.primary-nav .nav-contact:hover { color: var(--on-deep); background: var(--blue-dark); }

.theme-toggle {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  padding: 0;
  display: grid;
  place-items: center;
  color: var(--ink-soft);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  cursor: pointer;
  transition: color .16s ease, border-color .16s ease, background .16s ease, transform .16s ease;
}
.theme-toggle:hover {
  color: var(--blue-dark);
  border-color: var(--blue);
  background: var(--blue-soft);
  transform: translateY(-1px);
}
.theme-icon {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
html[data-theme="light"] .theme-icon-sun { display: none; }
html[data-theme="dark"] .theme-icon-moon { display: none; }

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--paper);
  cursor: pointer;
}
.menu-toggle span:not(.sr-only) {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
  border-radius: 99px;
  transition: transform .18s ease, opacity .18s ease;
}
.menu-toggle[aria-expanded="true"] span:nth-of-type(2) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-of-type(3) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-of-type(4) { transform: translateY(-7px) rotate(-45deg); }

.site-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 34px 22px 48px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}
.card {
  padding: 34px;
  background: var(--paper);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.section-label {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: .74rem;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
h1, h2, h3, p { overflow-wrap: break-word; }
h1, h2, h3 { color: var(--ink); }
h1 {
  max-width: 980px;
  margin: 0;
  font-size: clamp(2.45rem, 5vw, 4.05rem);
  line-height: 1.04;
  letter-spacing: -.047em;
  font-weight: 760;
}
h2 {
  margin: 0 0 16px;
  font-size: clamp(1.85rem, 3.3vw, 2.65rem);
  line-height: 1.13;
  letter-spacing: -.035em;
  font-weight: 750;
}
h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  line-height: 1.35;
  font-weight: 730;
}
p { margin: 0 0 14px; color: var(--ink-soft); }
p:last-child { margin-bottom: 0; }
.lead { color: var(--ink); font-size: 1.05rem; line-height: 1.72; }
.two-column { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 34px; }
.section-heading { max-width: 780px; margin-bottom: 26px; }

.hero-card {
  position: relative;
  overflow: hidden;
  padding-top: 39px;
  border-top: 4px solid var(--blue);
}
.hero-card::after {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  right: -220px;
  top: -220px;
  border-radius: 50%;
  background: var(--hero-orb);
  pointer-events: none;
}
.hero-copy { max-width: 880px; margin-top: 24px; }
.hero-copy p { color: var(--ink); font-size: 1.075rem; line-height: 1.75; }
.hero-copy .hero-lead {
  max-width: 900px;
  font-size: 1.18rem;
  line-height: 1.68;
  font-weight: 630;
}
.inline-link {
  color: var(--blue-dark);
  font-weight: 730;
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--blue) 45%, transparent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}
.inline-link:hover { color: var(--blue); }
.external-mark { margin-left: 3px; font-size: .94em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 27px; }
.hero-actions.compact { margin-top: 22px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 45px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: .93rem;
  font-weight: 720;
  text-decoration: none;
  transition: transform .14s ease, background .14s ease, border-color .14s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { color: var(--primary-ink); background: var(--blue); }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { color: var(--ink); background: var(--paper); border-color: var(--line-strong); }
.button-secondary:hover { border-color: var(--blue); color: var(--blue-dark); }
.hero-principles {
  margin-top: 34px;
  padding-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  border-top: 1px solid var(--line);
}
.hero-principles span { display: flex; flex-direction: column; gap: 3px; }
.hero-principles strong { color: var(--strong); font-size: .94rem; }
.hero-principles small { color: var(--ink-soft); font-size: .83rem; }

.intro-grid { align-items: start; }
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.benefit-grid article {
  min-height: 176px;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface-soft);
}
.number {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .10em;
}
.benefit-grid p { font-size: .92rem; line-height: 1.6; }

.example-grid { align-items: center; }
.example-visual {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--blue-soft);
}
.example-step {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 11px;
}
.example-step > span {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  color: var(--on-deep);
  background: var(--deep-surface);
  border-radius: 8px;
  font-size: .79rem;
  font-weight: 800;
}
.example-step div, .example-results div { display: flex; flex-direction: column; gap: 2px; }
.example-step strong, .example-results strong { color: var(--ink); font-size: .93rem; }
.example-step small, .example-results small { color: var(--ink-soft); font-size: .79rem; line-height: 1.45; }
.example-arrow { padding: 4px 0; text-align: center; color: var(--blue); font-weight: 800; }
.example-results { display: grid; gap: 8px; }
.example-results div {
  padding: 13px 14px;
  border-left: 3px solid var(--blue);
  background: var(--paper);
  border-radius: 8px;
}

.example-aspiration {
  margin-top: 20px;
  padding: 15px 16px;
  color: var(--ink-soft);
  background: var(--blue-soft);
  border-left: 3px solid var(--blue);
  border-radius: 9px;
  font-size: .94rem;
  line-height: 1.6;
}
.example-aspiration strong { color: var(--strong); }

.method-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}
.method-steps li {
  min-height: 214px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface-soft);
}
.method-steps li > span {
  display: grid;
  place-items: center;
  width: 31px;
  height: 31px;
  margin-bottom: 17px;
  color: white;
  background: var(--blue);
  border-radius: 8px;
  font-size: .78rem;
  font-weight: 800;
}
.method-steps h3 { font-size: 1rem; }
.method-steps p { font-size: .88rem; line-height: 1.55; }

.series-grid {
  display: grid;
  grid-template-columns: 1.45fr 1fr 1fr;
  gap: 16px;
}
.series-card {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface-soft);
}
.featured-series { background: var(--blue-soft); border-color: var(--featured-border); }
.series-status {
  display: inline-flex;
  margin-bottom: 17px;
  padding: 6px 9px;
  color: var(--blue-dark);
  background: var(--paper);
  border: 1px solid var(--status-border);
  border-radius: 7px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.series-card p { font-size: .94rem; }
.clean-list {
  margin: 18px 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 13px;
}
.clean-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: .86rem;
  line-height: 1.45;
}
.clean-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue);
}
.text-link {
  color: var(--blue-dark);
  font-size: .9rem;
  font-weight: 720;
  text-underline-offset: 3px;
}

.reporting-grid { align-items: start; }
.reporting-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.reporting-list article {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-soft);
}
.reporting-list strong { display: block; margin-bottom: 5px; color: var(--strong); font-size: .93rem; }
.reporting-list span { display: block; color: var(--ink-soft); font-size: .84rem; line-height: 1.5; }

.usu-card { background: linear-gradient(180deg, var(--usu-start), var(--usu-end)); }
.usu-grid { align-items: center; }
.formula-card {
  padding: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--paper);
  box-shadow: var(--shadow-small);
}
.formula-card > div {
  min-height: 92px;
  padding: 13px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  text-align: center;
  background: var(--blue-soft);
  border-radius: 9px;
}
.formula-card > span { color: var(--blue); font-size: 1.25rem; font-weight: 800; text-align: center; }
.formula-card strong { color: var(--strong); font-size: .9rem; }
.formula-card small { color: var(--ink-soft); font-size: .75rem; line-height: 1.35; }
.formula-card .equals { grid-column: 1 / -1; padding: 1px 0; }
.formula-card .formula-result { grid-column: 1 / -1; min-height: 76px; background: var(--deep-surface); }
.formula-card .formula-result strong, .formula-card .formula-result small { color: var(--on-deep); }

.faq-intro { max-width: 820px; margin-bottom: 26px; }
.faq-group + .faq-group { margin-top: 28px; }
.faq-group-title {
  margin: 0 0 10px;
  padding-bottom: 9px;
  color: var(--strong);
  border-bottom: 1px solid var(--line);
  font-size: .92rem;
  letter-spacing: .035em;
  text-transform: uppercase;
}
.faq-list { display: grid; gap: 9px; }
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface-soft);
  overflow: hidden;
}
.faq-list summary {
  position: relative;
  padding: 16px 48px 16px 17px;
  color: var(--ink);
  font-size: .98rem;
  font-weight: 700;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 17px;
  top: 50%;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  transform: translateY(-50%);
  color: var(--blue);
  background: var(--blue-soft);
  border-radius: 7px;
  font-size: 1.15rem;
  font-weight: 500;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details[open] summary { color: var(--blue-dark); background: var(--paper); border-bottom: 1px solid var(--line); }
.faq-answer { padding: 16px 17px 17px; background: var(--paper); }
.faq-answer p { font-size: .93rem; line-height: 1.65; }

.contact-card-section { border-top: 4px solid var(--deep-surface); }
.contact-grid { align-items: center; }
.contact-box {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface-soft);
}
.contact-label {
  margin: 0 0 3px;
  color: var(--ink-soft);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .10em;
  text-transform: uppercase;
}
.contact-box > a {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--blue-dark);
  font-weight: 720;
  text-underline-offset: 3px;
}
.contact-links { display: flex; flex-wrap: wrap; gap: 10px; padding-top: 4px; }
.contact-links a {
  padding: 8px 11px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: .84rem;
  font-weight: 680;
  text-decoration: none;
}
.contact-links a:hover { border-color: var(--blue); color: var(--blue-dark); }

.site-footer {
  margin-top: auto;
  color: var(--footer-text);
  background: var(--deep-surface);
}
.footer-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 30px 22px;
  display: grid;
  grid-template-columns: 1.2fr auto;
  gap: 18px 34px;
  align-items: start;
}
.footer-shell strong { color: var(--on-deep); }
.footer-shell p { margin: 4px 0 0; color: var(--footer-muted); font-size: .84rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; justify-content: flex-end; }
.footer-links a { color: var(--footer-text); font-size: .84rem; text-decoration: none; }
.footer-links a:hover { color: var(--on-deep); text-decoration: underline; text-underline-offset: 3px; }
.footer-legal { grid-column: 1 / -1; padding-top: 16px; border-top: 1px solid var(--footer-border); }

html[data-theme="dark"] .brand-mark,
html[data-theme="dark"] .primary-nav .nav-contact,
html[data-theme="dark"] .formula-card .formula-result,
html[data-theme="dark"] .site-footer {
  box-shadow: none;
}
html[data-theme="dark"] .hero-card,
html[data-theme="dark"] .card {
  border-color: var(--card-border);
}
html[data-theme="dark"] .button-secondary,
html[data-theme="dark"] .theme-toggle,
html[data-theme="dark"] .menu-toggle,
html[data-theme="dark"] .contact-links a,
html[data-theme="dark"] .example-step,
html[data-theme="dark"] .formula-card {
  background: var(--paper);
}
html[data-theme="dark"] .faq-list details,
html[data-theme="dark"] .benefit-grid article,
html[data-theme="dark"] .series-card,
html[data-theme="dark"] .contact-box {
  background: var(--surface-soft);
}

/* Standalone 404 page */
.not-found-page { min-height: 100vh; }
.not-found-page .site-header { position: static; }
.not-found-main {
  min-height: calc(100vh - 71px);
  padding: 32px 20px;
  display: grid;
  place-items: center;
}
.not-found-card {
  width: min(660px, 100%);
  padding: 42px;
  border: 1px solid var(--card-border);
  border-top: 4px solid var(--blue);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}
.not-found-card h1 {
  font-size: clamp(2.2rem, 7vw, 4rem);
}
.not-found-card p { margin-top: 16px; }

@media (max-width: 980px) {
  .primary-nav { gap: 14px; }
  .primary-nav a { font-size: .82rem; }
  .method-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .series-grid { grid-template-columns: 1fr 1fr; }
  .featured-series { grid-column: 1 / -1; }
  .formula-card { grid-template-columns: 1fr; }
  .formula-card > span { transform: rotate(90deg); }
  .formula-card .equals { grid-column: 1; transform: none; }
  .formula-card .formula-result { grid-column: 1; }
}

@media (max-width: 820px) {
  html { scroll-padding-top: 76px; }
  .menu-toggle { display: block; }
  .header-controls { gap: 8px; }
  .primary-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: calc(100% + 8px);
    display: none;
    padding: 10px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 13px;
    box-shadow: var(--shadow);
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav a { padding: 11px 12px; border-radius: 8px; font-size: .92rem; }
  .primary-nav a:hover { background: var(--blue-soft); }
  .primary-nav .nav-contact { color: var(--ink-soft); background: transparent; }
  .primary-nav .nav-contact:hover { color: var(--blue); background: var(--blue-soft); }
  .two-column { grid-template-columns: 1fr; }
  .hero-principles { grid-template-columns: 1fr; gap: 12px; }
  .benefit-grid { grid-template-columns: 1fr 1fr; }
  .reporting-grid { gap: 20px; }
  .footer-shell { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .footer-legal { grid-column: 1; }
}

@media (max-width: 650px) {
  body { font-size: 15px; }
  .nav-shell { min-height: 64px; padding: 0 16px; }
  .theme-toggle { width: 39px; height: 39px; }
  .brand-name { font-size: .9rem; }
  .brand-mark { width: 35px; height: 35px; }
  .site-shell { padding: 22px 14px 34px; gap: 18px; }
  .card { padding: 24px 20px; border-radius: 16px; }
  h1 { font-size: clamp(2.18rem, 12vw, 3.2rem); }
  h2 { font-size: 1.85rem; }
  .hero-copy p { font-size: 1rem; }
  .hero-copy .hero-lead { font-size: 1.07rem; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .benefit-grid { grid-template-columns: 1fr; }
  .benefit-grid article { min-height: 0; }
  .method-steps { grid-template-columns: 1fr; }
  .method-steps li { min-height: 0; }
  .series-grid { grid-template-columns: 1fr; }
  .featured-series { grid-column: auto; }
  .clean-list { grid-template-columns: 1fr; }
  .reporting-list { grid-template-columns: 1fr; }
  .example-visual { padding: 17px; }
  .formula-card { padding: 16px; }
  .faq-list summary { padding: 15px 45px 15px 14px; }
  .faq-answer { padding: 14px; }
  .contact-links { flex-direction: column; }
  .contact-links a { text-align: center; }
  .footer-links { gap: 11px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}