:root {
  --ink: #163142;
  --ink-soft: #4f6674;
  --brand: #12678f;
  --brand-dark: #0b4e70;
  --brand-light: #e8f5fa;
  --link: #12678f;
  --link-hover: #0b4e70;
  --accent: #18a6a6;
  --paper: #ffffff;
  --card: #ffffff;
  --surface: #f5fafc;
  --surface-strong: #eaf4f8;
  --border: #d4e5ec;
  --header: rgba(255, 255, 255, 0.94);
  --hero-start: #f8fcfe;
  --hero-end: #ffffff;
  --callout: #edfbfb;
  --code-background: #0f2b3b;
  --footer: #102b3a;
  --shadow: 0 18px 48px rgba(19, 55, 73, 0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 11px;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

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

a {
  color: var(--link);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--link-hover);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(24, 166, 166, 0.45);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  line-height: 1.16;
  letter-spacing: -0.025em;
}

h1 {
  margin: 0;
  font-size: clamp(2.35rem, 4.2vw, 4rem);
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.15rem);
}

h3 {
  margin: 0 0 0.55rem;
  font-size: 1.25rem;
}

p {
  margin: 0 0 1rem;
}

figure {
  margin: 0;
}

code,
pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
  font-size: 0.9em;
}

pre {
  margin: 0;
  padding: 1.2rem 1.3rem;
  border-radius: var(--radius-sm);
  color: #f5fbff;
  background: var(--code-background);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  color: #ffffff;
  background: var(--brand-dark);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--border);
  background: var(--header);
  backdrop-filter: blur(15px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--content), calc(100% - 2rem));
  min-height: 116px;
  margin: 0 auto;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  width: 96px;
  height: 96px;
  object-fit: contain;
  transition: filter 160ms ease;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--link);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0.38rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--ink);
  background: var(--card);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

main {
  overflow: hidden;
}

.hero {
  padding: clamp(3rem, 6vw, 5rem) 0 3rem;
  background:
    radial-gradient(circle at 88% 12%, rgba(24, 166, 166, 0.16), transparent 29%),
    radial-gradient(circle at 10% 32%, rgba(18, 103, 143, 0.14), transparent 25%),
    linear-gradient(180deg, var(--hero-start) 0%, var(--hero-end) 100%);
}

.hero-shell,
.section-shell,
.trust-strip {
  width: min(var(--content), calc(100% - 2rem));
  margin-inline: auto;
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3rem);
}

.hero-copy {
  max-width: 940px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
  color: var(--link);
  font-size: 0.83rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: var(--accent);
  content: "";
}

.lead {
  max-width: 760px;
  margin: 1.4rem 0 1.7rem;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.hero-byline {
  margin: 0.75rem 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.hero-byline + .lead {
  margin-top: 1rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.7rem 1rem;
  border: 1px solid var(--brand);
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #ffffff;
  background: var(--brand);
  box-shadow: 0 10px 24px rgba(18, 103, 143, 0.24);
}

.button-primary:hover {
  color: #ffffff;
  background: var(--brand-dark);
}

.button-secondary {
  color: var(--brand-dark);
  background: var(--card);
}

.button-secondary:hover {
  background: var(--brand-light);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.3rem;
}

.pill {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--ink-soft);
  background: var(--card);
  font-size: 0.82rem;
  font-weight: 750;
}

.hero-visual {
  position: relative;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card);
  box-shadow: var(--shadow);
}

.hero-screenshot-link {
  display: block;
  overflow: hidden;
  border-radius: calc(var(--radius-lg) - 9px);
  cursor: zoom-in;
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 1.58 / 1;
  object-fit: cover;
  object-position: left top;
  border-radius: calc(var(--radius-lg) - 9px);
}

.hero-visual figcaption {
  padding: 0.8rem 0.35rem 0.1rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
  text-align: center;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--border);
  overflow: hidden;
}

.trust-item {
  padding: 1rem;
  background: var(--card);
  text-align: center;
}

.trust-item strong {
  display: block;
  color: var(--brand-dark);
  font-size: 1.05rem;
}

.trust-item span {
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.section {
  padding: clamp(4.2rem, 8vw, 7rem) 0;
}

.section-tint {
  border-block: 1px solid var(--border);
  background: var(--surface);
}

.audience-section {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-block: 1px solid var(--border);
  background: var(--surface);
}

.audience-shell {
  display: grid;
  grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr);
  align-items: end;
  gap: clamp(1.5rem, 5vw, 4rem);
}

.audience-shell .eyebrow {
  margin-bottom: 0.65rem;
}

.audience-shell h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.65rem);
}

.audience-shell p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 2.2rem;
}

.section-heading p {
  margin: 1rem 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.card,
.step,
.resource-card,
.note-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
}

.card {
  padding: 1.35rem;
}

.card-number {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.85rem;
  place-items: center;
  border-radius: 50%;
  color: #ffffff;
  background: var(--brand);
  font-size: 0.82rem;
  font-weight: 850;
}

.card p,
.step p,
.resource-card p,
.note-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: clamp(1.5rem, 4vw, 3.5rem);
}

.screenshot {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
  box-shadow: var(--shadow);
}

.screenshot img {
  width: 100%;
  border-radius: var(--radius-md);
}

.code-card {
  overflow: hidden;
  border: 1px solid #224b5e;
  border-radius: var(--radius-md);
  background: var(--code-background);
  box-shadow: var(--shadow);
}

.code-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1.15rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  color: #b9dce9;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.copy-code {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  flex: 0 0 auto;
  padding: 0;
  border: 1px solid rgba(185, 220, 233, 0.5);
  border-radius: 8px;
  color: #dff4fb;
  background: rgba(255, 255, 255, 0.07);
  font: inherit;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
}

.copy-code svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.copy-code:hover {
  border-color: #70c9e8;
  background: rgba(112, 201, 232, 0.16);
}

.copy-code[data-copied="true"] {
  border-color: #55d0c8;
  color: #a7f2ed;
  background: rgba(85, 208, 200, 0.14);
}

.copy-code[data-error="true"] {
  border-color: #f0a6a6;
  color: #ffd0d0;
}

.note-card {
  padding: 1.25rem;
}

.note-card + .note-card {
  margin-top: 1rem;
}

.note-card strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--brand-dark);
}

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

.step {
  position: relative;
  padding: 1.35rem;
  overflow: hidden;
}

.step::after {
  position: absolute;
  right: -20px;
  bottom: -28px;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--brand-light);
  content: "";
}

.step-label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.gallery figure {
  margin: 0;
  padding: 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card);
}

.gallery img {
  width: 100%;
  border-radius: var(--radius-sm);
}

.gallery figcaption {
  padding: 0.65rem 0.25rem 0.15rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.check-list {
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin-bottom: 0.7rem;
  padding-left: 1.7rem;
}

.check-list li::before {
  position: absolute;
  top: 0.1rem;
  left: 0;
  color: var(--accent);
  font-weight: 900;
  content: "✓";
}

.table-wrap {
  max-width: 100%;
  margin-top: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.parameter-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: var(--card);
  font-size: 0.92rem;
}

.parameter-table th,
.parameter-table td {
  padding: 0.82rem 0.9rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.parameter-table th {
  color: var(--brand-dark);
  background: var(--surface-strong);
}

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

.parameter-table tbody tr:nth-child(even) {
  background: var(--surface);
}

.callout {
  margin-top: 1.5rem;
  padding: 1.15rem 1.25rem;
  border-left: 5px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ink-soft);
  background: var(--callout);
}

.callout strong {
  color: var(--ink);
}

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

.resource-card {
  display: flex;
  min-height: 185px;
  padding: 1.35rem;
  flex-direction: column;
}

.resource-card a {
  margin-top: auto;
  padding-top: 1.1rem;
  font-weight: 800;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: auto;
  padding-top: 1.1rem;
}

.resource-card .resource-links a {
  margin-top: 0;
  padding-top: 0;
}

.citation {
  padding: 1.3rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.citation p:last-child {
  margin-bottom: 0;
}

.site-footer {
  padding: 2.2rem 0;
  color: #c7d8e0;
  background: var(--footer);
}

.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--content), calc(100% - 2rem));
  margin: 0 auto;
  gap: 1rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: #d8f6f4;
}

html[data-theme="dark"] {
  --ink: #edf6f9;
  --ink-soft: #b6cbd4;
  --brand: #16779f;
  --brand-dark: #0f5b7a;
  --brand-light: #123b4d;
  --link: #70c9e8;
  --link-hover: #a9e5f5;
  --accent: #55d0c8;
  --paper: #08171f;
  --card: #102731;
  --surface: #0c2029;
  --surface-strong: #15333f;
  --border: #294752;
  --header: rgba(8, 23, 31, 0.95);
  --hero-start: #0b222c;
  --hero-end: #08171f;
  --callout: #0d3135;
  --code-background: #05141b;
  --footer: #050f14;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

html[data-theme="dark"] .brand img {
  filter: brightness(0) invert(1);
}

html[data-theme="dark"] .button-primary,
html[data-theme="dark"] .card-number {
  color: #ffffff;
  background: #16779f;
}

html[data-theme="dark"] .button-primary:hover {
  color: #ffffff;
  background: #0f5b7a;
}

html[data-theme="dark"] .button-secondary {
  color: #b7e7f5;
}

html[data-theme="dark"] .trust-item strong,
html[data-theme="dark"] .note-card strong,
html[data-theme="dark"] .parameter-table th {
  color: #9edff2;
}

@media (max-width: 980px) {
  .nav-shell {
    align-items: flex-start;
    padding: 0.75rem 0;
    flex-direction: column;
    gap: 0.55rem;
  }

  .nav-links {
    min-width: 0;
    width: 100%;
    padding-bottom: 0.25rem;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .nav-actions {
    width: 100%;
  }

  .nav-links {
    flex: 1 1 auto;
  }

  .theme-toggle {
    flex: 0 0 auto;
  }

  .hero-shell,
  .audience-shell,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    max-width: 780px;
  }

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

@media (max-width: 720px) {
  html {
    scroll-padding-top: 112px;
  }

  body {
    font-size: 16px;
  }

  .hero-shell,
  .section-shell,
  .trust-strip,
  .nav-shell,
  .footer-shell {
    width: min(100% - 1.25rem, var(--content));
  }

  .hero {
    padding-top: 3rem;
  }

  h1 {
    font-size: clamp(2.15rem, 10vw, 2.8rem);
  }

  .cta-group {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .trust-strip,
  .card-grid,
  .workflow,
  .resource-grid,
  .gallery {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    gap: 1px;
  }

  .section {
    padding: 4rem 0;
  }

  .hero-visual {
    padding: 0.55rem;
    border-radius: var(--radius-md);
  }

  .hero-visual img {
    aspect-ratio: 1.1 / 1;
  }

  .footer-shell {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}