:root {
  color-scheme: dark;
  --bg: #07080c;
  --surface: #101219;
  --surface-soft: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.075);
  --text: #f5f7fb;
  --muted: #b8c0ce;
  --line: rgba(255, 255, 255, 0.12);
  --gold: #f3c766;
  --silver: #d8e2ec;
  --green: #67d7b0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 84% 10%, rgba(103, 215, 176, 0.11), transparent 30rem),
    radial-gradient(circle at 12% 2%, rgba(243, 199, 102, 0.13), transparent 32rem),
    linear-gradient(180deg, #07080c 0%, #0a0c12 46%, #0d0d12 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  margin: 0;
  min-width: 320px;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(18px);
  background: rgba(7, 8, 12, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  height: 68px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(14px, 4vw, 54px);
  position: sticky;
  right: 0;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 15px;
  font-weight: 850;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  background: linear-gradient(135deg, var(--gold), var(--silver));
  border-radius: 11px;
  color: #14120b;
  display: grid;
  height: 32px;
  place-items: center;
  width: 32px;
}

.top-links {
  display: flex;
  gap: 8px;
}

.top-links a,
.primary-link,
.secondary-link {
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
}

.top-links a {
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(244, 247, 251, 0.9);
  font-size: 13px;
  padding: 9px 13px;
}

.hero {
  display: grid;
  gap: clamp(32px, 6vw, 84px);
  grid-template-columns: minmax(0, 1fr) minmax(320px, 470px);
  min-height: calc(100svh - 68px);
  overflow: hidden;
  padding: clamp(54px, 8vw, 104px) clamp(18px, 5vw, 72px);
  position: relative;
}

.hero::before {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.032) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px);
  background-size: 88px 88px;
  content: "";
  inset: 0;
  mask-image: linear-gradient(180deg, #000 76%, transparent);
  position: absolute;
}

.hero-copy,
.guide-map {
  align-self: center;
  position: relative;
  z-index: 1;
}

.hero-copy {
  max-width: 900px;
}

.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
  margin: 0 0 18px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(48px, 7vw, 96px);
  letter-spacing: 0;
  line-height: 0.96;
  margin-bottom: 28px;
}

h2 {
  font-size: clamp(34px, 4.4vw, 58px);
  letter-spacing: 0;
  line-height: 1.04;
  margin-bottom: 20px;
}

h3 {
  font-size: 21px;
  line-height: 1.2;
  margin-bottom: 8px;
}

p,
li,
small {
  color: var(--muted);
  line-height: 1.62;
}

.hero-copy > p:not(.eyebrow),
.section-heading > p {
  color: var(--silver);
  font-size: clamp(18px, 2vw, 23px);
  max-width: 780px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  font-size: 15px;
  justify-content: center;
  padding: 13px 18px;
}

.primary-link {
  background: linear-gradient(135deg, rgba(243, 199, 102, 0.96), rgba(216, 226, 236, 0.9));
  color: #16120a;
}

.secondary-link {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.guide-map {
  background:
    linear-gradient(135deg, rgba(243, 199, 102, 0.11), transparent 42%),
    rgba(17, 19, 27, 0.82);
  border: 1px solid rgba(243, 199, 102, 0.22);
  border-radius: 28px;
  display: grid;
  gap: 0;
  overflow: hidden;
}

.map-row {
  display: grid;
  gap: 18px;
  grid-template-columns: 52px minmax(0, 1fr);
  padding: 22px;
}

.map-row + .map-row {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.map-number {
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.map-row strong,
.map-row span:last-child {
  display: block;
}

.map-row strong {
  font-size: 18px;
}

.map-row span:last-child {
  color: var(--muted);
  margin-top: 4px;
}

.section {
  padding: clamp(62px, 8vw, 108px) clamp(18px, 5vw, 72px);
}

.section-heading {
  max-width: 920px;
}

.decision,
.app-solutions,
.faq {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.decision-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 34px;
}

.decision-grid a {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  min-height: 210px;
  padding: 20px;
  text-decoration: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.decision-grid a:hover {
  background: var(--surface-strong);
  border-color: rgba(243, 199, 102, 0.34);
  transform: translateY(-2px);
}

.decision-grid span,
.solution-row span {
  color: var(--gold);
  display: block;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.decision-grid strong {
  display: block;
  font-size: 22px;
  line-height: 1.12;
  margin-bottom: 14px;
}

.decision-grid small {
  display: block;
  font-size: 15px;
}

.article-shell {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: 220px minmax(0, 920px);
  justify-content: center;
  padding: clamp(62px, 8vw, 108px) clamp(18px, 5vw, 72px);
}

.toc {
  align-self: start;
  position: sticky;
  top: 96px;
}

.toc p {
  color: var(--gold);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.toc a {
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--muted);
  display: block;
  font-size: 14px;
  font-weight: 750;
  padding: 9px 0 9px 14px;
  text-decoration: none;
}

.toc a:hover {
  color: var(--text);
  border-color: var(--gold);
}

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

.guide-section {
  padding: 0 0 clamp(58px, 7vw, 92px);
}

.guide-section + .guide-section {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: clamp(58px, 7vw, 92px);
}

.guide-section > p:not(.eyebrow) {
  color: var(--silver);
  font-size: clamp(17px, 1.7vw, 21px);
}

.answer-block,
.checklist,
.mark-table,
.formula,
.tool-strip,
.warning-section {
  margin-top: 28px;
}

.answer-block {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.answer-block div,
.checklist,
.warning-section {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  padding: 22px;
}

.answer-block p,
.checklist p,
.warning-section p {
  margin-bottom: 0;
}

.checklist ul {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding-left: 20px;
}

.mark-table {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  overflow: hidden;
}

.mark-table div {
  display: grid;
  gap: 16px;
  grid-template-columns: 92px minmax(0, 1fr);
  padding: 18px 22px;
}

.mark-table div + div {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.mark-table strong {
  color: var(--text);
  font-size: 28px;
}

.mark-table span {
  align-self: center;
  color: var(--muted);
}

.formula {
  align-items: center;
  background: linear-gradient(135deg, rgba(103, 215, 176, 0.12), rgba(243, 199, 102, 0.08));
  border: 1px solid rgba(103, 215, 176, 0.24);
  border-radius: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px;
}

.formula span,
.formula strong {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 10px 13px;
}

.formula strong {
  color: var(--green);
}

.tool-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tool-strip a {
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 18px;
  display: inline-flex;
  gap: 12px;
  min-height: 70px;
  padding: 10px 14px 10px 10px;
  text-decoration: none;
}

.tool-strip a:hover {
  border-color: rgba(243, 199, 102, 0.34);
}

.tool-strip img {
  border-radius: 22%;
  height: 48px;
  width: 48px;
}

.tool-strip span {
  font-weight: 850;
}

.app-solutions {
  background: rgba(255, 255, 255, 0.018);
}

.solution-list {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.solution-row {
  align-items: start;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(220px, 0.82fr) minmax(0, 1fr);
  padding: 18px;
}

.solution-row strong {
  display: block;
  line-height: 1.25;
}

.solution-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.solution-links a {
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 850;
  padding: 12px 14px;
  text-align: center;
  text-decoration: none;
}

.solution-links a:hover {
  border-color: rgba(243, 199, 102, 0.34);
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 30px;
  max-width: 980px;
}

.faq-list details {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 22px;
}

.faq-list summary {
  cursor: pointer;
  font-size: 18px;
  font-weight: 850;
}

.faq-list p {
  margin: 14px 0 0;
}

.footer {
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  padding: 30px 18px 38px;
}

.footer span {
  color: var(--text);
  font-weight: 850;
}

.footer a {
  text-decoration: none;
}

@media (max-width: 1060px) {
  .hero,
  .article-shell {
    grid-template-columns: 1fr;
  }

  .guide-map {
    max-width: 720px;
  }

  .toc {
    display: none;
  }

  .decision-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .solution-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 64px;
    padding-inline: 12px;
  }

  .brand {
    font-size: 14px;
    gap: 8px;
  }

  .brand-mark {
    border-radius: 10px;
    height: 30px;
    width: 30px;
  }

  .top-links {
    gap: 6px;
  }

  .top-links a {
    font-size: 12px;
    padding: 8px 9px;
  }

  .hero {
    min-height: auto;
    padding-inline: 18px;
    padding-top: 42px;
  }

  h1 {
    font-size: clamp(40px, 11vw, 54px);
    line-height: 1;
  }

  h2 {
    font-size: clamp(31px, 9vw, 44px);
  }

  .hero-actions {
    display: grid;
  }

  .guide-map,
  .decision-grid a,
  .answer-block div,
  .checklist,
  .mark-table,
  .formula,
  .warning-section,
  .solution-row,
  .faq-list details {
    border-radius: 18px;
  }

  .map-row {
    grid-template-columns: 46px minmax(0, 1fr);
    padding: 18px;
  }

  .decision-grid,
  .answer-block {
    grid-template-columns: 1fr;
  }

  .decision-grid a {
    min-height: auto;
  }

  .article-shell {
    padding-inline: 18px;
  }

  .mark-table div {
    gap: 10px;
    grid-template-columns: 74px minmax(0, 1fr);
    padding: 16px;
  }

  .mark-table strong {
    font-size: 24px;
  }
}

@media (max-width: 380px) {
  .site-header {
    padding-inline: 8px;
  }

  .brand span:not(.brand-mark) {
    display: none;
  }

  .top-links {
    gap: 4px;
  }

  .top-links a {
    font-size: 11px;
    padding: 8px;
  }
}