:root {
  --color-bg: #09111f;
  --color-bg-soft: #101a2d;
  --color-surface: #141f34;
  --color-surface-strong: #1b2942;
  --color-card: rgba(255, 255, 255, 0.065);
  --color-card-border: rgba(178, 197, 255, 0.18);
  --color-text: #eef3ff;
  --color-muted: #aab7d2;
  --color-heading: #ffffff;
  --color-accent: #7c5cff;
  --color-accent-2: #22d3ee;
  --color-accent-3: #f6c85f;
  --color-positive: #61e6a8;
  --color-danger: #ff7a90;
  --color-link: #8ee7ff;
  --color-button-text: #08111f;
  --font-sans: "Inter", "Manrope", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Space Grotesk", "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --container: 1160px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-soft: 0 24px 80px rgba(0, 0, 0, 0.32);
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.22);
  --gradient-main: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  --gradient-warm: linear-gradient(135deg, rgba(246, 200, 95, 0.18), rgba(124, 92, 255, 0.12));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background:
    radial-gradient(circle at 12% 8%, rgba(124, 92, 255, 0.22), transparent 30%),
    radial-gradient(circle at 90% 14%, rgba(34, 211, 238, 0.15), transparent 28%),
    linear-gradient(180deg, var(--color-bg), #0b1324 45%, #080d18 100%);
  min-height: 100vh;
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}

img,
svg {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

a:hover {
  color: #ffffff;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.55);
  outline-offset: 3px;
}

p {
  margin: 0 0 1rem;
  color: var(--color-muted);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  color: var(--color-heading);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(2.55rem, 6vw, 5.7rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

h3 {
  font-size: clamp(1.25rem, 2.3vw, 1.75rem);
}

ul,
ol {
  color: var(--color-muted);
}

.container {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(22px);
  background: rgba(9, 17, 31, 0.78);
  border-bottom: 1px solid rgba(178, 197, 255, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 78px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.04em;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 16px;
  color: var(--color-button-text);
  background: var(--gradient-main);
  box-shadow: 0 12px 36px rgba(34, 211, 238, 0.2);
  font-family: var(--font-mono);
  font-weight: 800;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.075);
}

.header-cta {
  display: inline-flex;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  font-weight: 750;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
}

.button-primary {
  color: var(--color-button-text);
  background: var(--gradient-main);
  box-shadow: 0 18px 36px rgba(124, 92, 255, 0.25);
}

.button-primary:hover {
  color: var(--color-button-text);
  transform: translateY(-2px);
  box-shadow: 0 22px 44px rgba(34, 211, 238, 0.22);
}

.button-secondary {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(178, 197, 255, 0.2);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.hero,
.page-hero {
  padding: clamp(4.8rem, 9vw, 8rem) 0 clamp(3.5rem, 7vw, 6rem);
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(320px, 0.94fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.2rem;
  padding: 0.42rem 0.72rem;
  border-radius: 999px;
  color: #dce8ff;
  border: 1px solid rgba(178, 197, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.92rem;
}

.eyebrow::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background: var(--color-positive);
  box-shadow: 0 0 0 6px rgba(97, 230, 168, 0.12);
}

.lead {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: #d0dcf4;
  max-width: 720px;
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  margin-top: 2.3rem;
}

.stat-card {
  padding: 1rem;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.055);
}

.stat-card strong {
  display: block;
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 1.5rem;
}

.stat-card span {
  color: var(--color-muted);
  font-size: 0.88rem;
}

.visual-card {
  position: relative;
  border: 1px solid rgba(178, 197, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 1rem;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.visual-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -30% 20%;
  height: 160px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.25), transparent 68%);
  pointer-events: none;
}

.visual-card img {
  display: block;
  border-radius: 22px;
}

.section {
  padding: clamp(3.4rem, 7vw, 6rem) 0;
}

.section-muted {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0));
}

.section-header {
  max-width: 760px;
  margin-bottom: 2.4rem;
}

.section-kicker {
  margin-bottom: 0.8rem;
  color: var(--color-accent-2);
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

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

.card,
.prompt-card,
.info-panel,
.quote-panel {
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  background: var(--color-card);
  box-shadow: var(--shadow-card);
}

.card,
.prompt-card,
.info-panel {
  padding: clamp(1.15rem, 2vw, 1.55rem);
}

.card {
  min-height: 100%;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 1.1rem;
  border-radius: 17px;
  color: #ffffff;
  background: rgba(124, 92, 255, 0.18);
  border: 1px solid rgba(178, 197, 255, 0.15);
  font-family: var(--font-mono);
}

.card p:last-child,
.prompt-card p:last-child,
.info-panel p:last-child {
  margin-bottom: 0;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.2rem 0 0;
}

.tag,
.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid rgba(178, 197, 255, 0.17);
  background: rgba(255, 255, 255, 0.06);
  color: #dce8ff;
  font-size: 0.82rem;
  line-height: 1;
}

.tag {
  padding: 0.45rem 0.65rem;
}

.badge {
  padding: 0.36rem 0.55rem;
  color: var(--color-accent-2);
}

.prompt-card {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.prompt-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.1rem;
}

.prompt-box {
  padding: 1rem;
  margin: 0.3rem 0;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid rgba(178, 197, 255, 0.12);
  color: #e8f4ff;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.65;
}

.prompt-card footer {
  margin-top: auto;
}

.inline-link {
  font-weight: 750;
  border-bottom: 1px solid rgba(142, 231, 255, 0.35);
}

.feature-list {
  display: grid;
  gap: 0.85rem;
  padding: 0;
  margin: 1.4rem 0 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 2rem;
  color: #d4def2;
}

.feature-list li::before {
  content: "↳";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent-2);
  font-family: var(--font-mono);
}

.steps {
  display: grid;
  gap: 1rem;
  counter-reset: steps;
}

.step {
  position: relative;
  padding: 1.25rem 1.25rem 1.25rem 4.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  background: rgba(255, 255, 255, 0.05);
}

.step::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  left: 1.25rem;
  top: 1.25rem;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 14px;
  background: var(--gradient-main);
  color: var(--color-button-text);
  font-family: var(--font-mono);
  font-weight: 900;
}

.category-list {
  display: grid;
  gap: 1rem;
}

.category-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: start;
  padding: 1.25rem;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.052);
}

.category-item h3 {
  margin-bottom: 0.45rem;
}

.category-item .tag-row {
  margin-top: 0.85rem;
}

.category-arrow {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: var(--color-button-text);
  background: var(--gradient-main);
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.28fr);
  gap: 2rem;
  align-items: start;
}

.article-body {
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.05);
  padding: clamp(1.3rem, 3vw, 2.2rem);
}

.article-body h2 {
  margin-top: 2.2rem;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  margin-top: 1.7rem;
}

.article-body code {
  padding: 0.12rem 0.35rem;
  border-radius: 8px;
  color: #ffffff;
  background: rgba(124, 92, 255, 0.18);
  font-family: var(--font-mono);
}

.side-nav {
  position: sticky;
  top: 100px;
  padding: 1.1rem;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.055);
}

.side-nav p {
  margin-bottom: 0.65rem;
  color: #ffffff;
  font-weight: 750;
}

.side-nav a {
  display: block;
  padding: 0.5rem 0;
  color: var(--color-muted);
}

.side-nav a:hover {
  color: #ffffff;
}

.quote-panel {
  padding: clamp(1.4rem, 3vw, 2rem);
  background: var(--gradient-warm);
}

.quote-panel blockquote {
  margin: 0;
  font-family: var(--font-display);
  color: #ffffff;
  font-size: clamp(1.35rem, 2.7vw, 2rem);
  line-height: 1.25;
}

.quote-panel cite {
  display: block;
  margin-top: 1rem;
  color: var(--color-muted);
  font-style: normal;
}

.cta-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 2rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: calc(var(--radius-lg) + 8px);
  border: 1px solid rgba(178, 197, 255, 0.2);
  background:
    radial-gradient(circle at 90% 10%, rgba(34, 211, 238, 0.23), transparent 35%),
    linear-gradient(135deg, rgba(124, 92, 255, 0.24), rgba(255, 255, 255, 0.06));
  box-shadow: var(--shadow-soft);
}

.cta-panel h2 {
  margin-bottom: 0.6rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.2rem;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.breadcrumbs a {
  color: var(--color-muted);
}

.breadcrumbs span {
  color: #ffffff;
}

.footer {
  padding: 3rem 0;
  border-top: 1px solid rgba(178, 197, 255, 0.12);
  background: rgba(0, 0, 0, 0.16);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(160px, 0.4fr));
  gap: 2rem;
}

.footer p {
  max-width: 580px;
}

.footer-links {
  display: grid;
  gap: 0.55rem;
}

.footer small {
  display: block;
  margin-top: 2rem;
  color: var(--color-muted);
}

.check-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-card-border);
}

.check-table th,
.check-table td {
  padding: 0.85rem;
  border-bottom: 1px solid rgba(178, 197, 255, 0.12);
  text-align: left;
  vertical-align: top;
}

.check-table th {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.065);
}

.check-table tr:last-child td {
  border-bottom: 0;
}

.notice {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(34, 211, 238, 0.25);
  border-radius: var(--radius-md);
  background: rgba(34, 211, 238, 0.08);
  color: #d9f8ff;
}

@media (max-width: 980px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .nav-list {
    width: max-content;
  }

  .header-cta {
    display: none;
  }

  .hero-grid,
  .split-grid,
  .content-layout,
  .cta-panel,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .side-nav {
    position: static;
  }

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

@media (max-width: 680px) {
  body {
    line-height: 1.65;
  }

  .container {
    width: min(100% - 24px, var(--container));
  }

  .hero,
  .page-hero {
    padding-top: 3.7rem;
  }

  .hero-stats,
  .card-grid,
  .card-grid.two {
    grid-template-columns: 1fr;
  }

  .category-item {
    grid-template-columns: 1fr;
  }

  .category-arrow {
    display: none;
  }

  .button {
    width: 100%;
  }

  .hero-actions,
  .section-actions {
    width: 100%;
  }

  .step {
    padding: 4.25rem 1.1rem 1.1rem;
  }

  .step::before {
    left: 1.1rem;
    top: 1.1rem;
  }

  .check-table {
    display: block;
    overflow-x: auto;
  }
}