:root {
  --tutorial-brand: #a61e3a;
  --tutorial-brand-dark: #741229;
  --tutorial-navy: #173a60;
  --tutorial-ink: #1d2025;
  --tutorial-muted: #68707a;
  --tutorial-line: #ded8d1;
  --tutorial-paper: #f7f4ef;
  --tutorial-white: #fff;
  --tutorial-radius: 22px;
}

.tutorial-page {
  background:
    radial-gradient(circle at 4% 3%, rgba(166, 30, 58, .09), transparent 30rem),
    var(--tutorial-paper);
}

.tutorial-page main {
  width: min(1280px, calc(100% - 40px));
}

.tutorial-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(38px, 7vw, 84px);
  border: 1px solid var(--tutorial-line);
  border-radius: 28px;
  background:
    linear-gradient(112deg, rgba(255, 255, 255, .98), rgba(251, 247, 244, .92)),
    var(--tutorial-white);
  box-shadow: 0 26px 72px rgba(50, 39, 34, .09);
}

.tutorial-hero::after {
  position: absolute;
  top: -110px;
  right: -90px;
  width: 360px;
  height: 360px;
  border: 1px solid rgba(166, 30, 58, .13);
  border-radius: 50%;
  box-shadow:
    0 0 0 58px rgba(166, 30, 58, .035),
    0 0 0 116px rgba(166, 30, 58, .02);
  content: '';
  pointer-events: none;
}

.tutorial-eyebrow,
.tutorial-example {
  margin: 0 0 10px;
  color: var(--tutorial-brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.tutorial-hero h1 {
  position: relative;
  z-index: 1;
  max-width: 900px;
  font-size: clamp(38px, 6vw, 72px);
  letter-spacing: -.05em;
  line-height: 1.08;
}

.tutorial-lede {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 24px 0 0;
  color: #40464f;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.75;
}

.tutorial-hero-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.tutorial-primary-cta,
.tutorial-secondary-cta,
.tutorial-tool-cta {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.tutorial-primary-cta,
.tutorial-tool-cta {
  color: #fff;
  background: var(--tutorial-navy);
}

.tutorial-secondary-cta {
  border-color: rgba(29, 32, 37, .2);
  background: rgba(255, 255, 255, .8);
  color: var(--tutorial-ink);
}

.tutorial-primary-cta:hover,
.tutorial-tool-cta:hover {
  background: #0d2c4c;
  transform: translateY(-2px);
}

.tutorial-secondary-cta:hover {
  border-color: rgba(29, 32, 37, .4);
  transform: translateY(-2px);
}

.tutorial-primary-cta:focus-visible,
.tutorial-secondary-cta:focus-visible,
.tutorial-tool-cta:focus-visible,
.tutorial-chapter-nav a:focus-visible,
.tutorial-image-button:focus-visible,
.tutorial-lightbox-close:focus-visible {
  outline: 3px solid rgba(166, 30, 58, .35);
  outline-offset: 3px;
}

.tutorial-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 860px;
  margin: 42px 0 0;
  padding: 0;
  border-top: 1px solid var(--tutorial-line);
}

.tutorial-meta > div {
  display: grid;
  gap: 3px;
  padding: 18px 18px 0 0;
}

.tutorial-meta dt {
  color: var(--tutorial-muted);
  font-size: 11px;
}

.tutorial-meta dd {
  margin: 0;
  color: var(--tutorial-ink);
  font-size: 14px;
  font-weight: 750;
}

.tutorial-chapter-nav {
  position: sticky;
  z-index: 8;
  top: 82px;
  margin: 22px 0 0;
  padding: 10px;
  border: 1px solid rgba(222, 216, 209, .9);
  border-radius: 16px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 12px 34px rgba(51, 43, 38, .08);
  backdrop-filter: blur(16px);
}

.tutorial-chapter-nav ol {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tutorial-chapter-nav a {
  min-height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: #555e68;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: color 140ms ease, background 140ms ease;
}

.tutorial-chapter-nav a:hover,
.tutorial-chapter-nav a.is-active {
  color: var(--tutorial-brand);
  background: rgba(166, 30, 58, .08);
}

.tutorial-content {
  display: grid;
  gap: 28px;
  margin: 28px 0 64px;
}

.tutorial-chapter {
  scroll-margin-top: 154px;
  padding: clamp(24px, 4.5vw, 54px);
  border: 1px solid var(--tutorial-line);
  border-radius: var(--tutorial-radius);
  background: var(--tutorial-white);
  box-shadow: 0 16px 54px rgba(54, 42, 36, .065);
}

.tutorial-chapter-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
}

.tutorial-chapter-index {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: #fff;
  background: var(--tutorial-brand);
  font: 800 15px/1 Consolas, "SFMono-Regular", monospace;
  letter-spacing: .08em;
}

.tutorial-chapter-copy {
  min-width: 0;
}

.tutorial-chapter-copy h2 {
  margin: 0;
  font-size: clamp(27px, 3.5vw, 42px);
  letter-spacing: -.04em;
}

.tutorial-chapter-copy > p:last-child {
  margin: 8px 0 0;
  color: var(--tutorial-muted);
  font-size: 14px;
}

.tutorial-tool-cta {
  white-space: nowrap;
}

.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 34px 0;
  padding: 0;
  list-style: none;
}

.tutorial-steps > li {
  min-width: 0;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  min-height: 116px;
  padding: 16px;
  border: 1px solid #e8e3dd;
  border-radius: 15px;
  background: #faf8f5;
}

.tutorial-step-number {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--tutorial-brand);
  font: 800 12px/1 Consolas, "SFMono-Regular", monospace;
}

.tutorial-steps h3 {
  margin: 2px 0 0;
  font-size: 15px;
  line-height: 1.35;
}

.tutorial-steps p {
  margin: 7px 0 0;
  color: #555d67;
  font-size: 12px;
  line-height: 1.65;
}

.tutorial-interpretation {
  margin: 12px 0 38px;
  padding: 28px 0 30px;
  border-top: 2px solid #30363d;
  border-bottom: 1px solid #d9dde1;
  background: #fff;
}

.tutorial-interpretation::before {
  content: none;
}

.tutorial-interpretation > header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 21px;
}

.tutorial-interpretation .tutorial-example {
  margin-bottom: 7px;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .13em;
  color: #6a737d;
}

.tutorial-interpretation h3 {
  margin: 0;
  color: #271f22;
  font-size: clamp(28px, 3vw, 36px);
  line-height: 1.08;
  letter-spacing: -.025em;
}

.tutorial-interpretation > header > span {
  padding: 0;
  color: #68717a;
  background: transparent;
  font-size: 13px;
  font-weight: 750;
  white-space: nowrap;
}

.tutorial-interpretation ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tutorial-interpretation li {
  min-width: 0;
  padding: 19px 20px;
  border: 0;
  border-left: 3px solid #8b949e;
  border-radius: 2px;
  background: #f5f6f7;
}

.tutorial-interpretation li strong {
  color: #24292f;
  font-size: 17px;
  line-height: 1.35;
}

.tutorial-interpretation li p {
  margin: 10px 0 0;
  color: #3f4147;
  font-size: 15px;
  line-height: 1.72;
}

.tutorial-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
  gap: 14px;
}

.tutorial-figure {
  min-width: 0;
  margin: 0;
}

.tutorial-image-button {
  position: relative;
  width: 100%;
  display: block;
  overflow: hidden;
  border: 1px solid #d7d1cb;
  border-radius: 15px;
  background: #eae7e2;
  padding: 0;
  cursor: zoom-in;
  box-shadow: 0 9px 28px rgba(35, 31, 29, .08);
}

.tutorial-image-button img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  object-position: top center;
  background: #f4f1ef;
  transition: transform 220ms ease;
}

.tutorial-image-button:hover img {
  transform: scale(1.012);
}

.tutorial-zoom-hint {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 5px 9px;
  border-radius: 999px;
  color: #fff;
  background: rgba(23, 58, 96, .88);
  font-size: 10px;
  font-weight: 700;
  pointer-events: none;
}

.tutorial-figure figcaption {
  margin-top: 9px;
  color: var(--tutorial-muted);
  font-size: 11px;
  line-height: 1.55;
}

.tutorial-chapter-note,
.tutorial-risk-note {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 13px;
  margin-top: 28px;
  padding: 17px 19px;
  border-left: 4px solid var(--tutorial-brand);
  border-radius: 0 12px 12px 0;
  background: #f8edef;
}

.tutorial-chapter-note strong,
.tutorial-risk-note strong {
  color: var(--tutorial-brand-dark);
  font-size: 13px;
}

.tutorial-chapter-note p,
.tutorial-risk-note p {
  margin: 0;
  color: #55505a;
  font-size: 13px;
  line-height: 1.65;
}

.tutorial-risk-note {
  margin-top: 0;
  border: 1px solid #e5d8d9;
  border-left: 4px solid var(--tutorial-brand);
  background: #fff9f9;
}

.tutorial-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.tutorial-lightbox {
  width: min(1500px, calc(100vw - 32px));
  max-width: none;
  max-height: calc(100vh - 32px);
  overflow: visible;
  border: 0;
  border-radius: 18px;
  background: transparent;
  padding: 0;
}

.tutorial-lightbox::backdrop {
  background: rgba(9, 13, 19, .88);
  backdrop-filter: blur(4px);
}

.tutorial-lightbox-panel {
  position: relative;
  max-height: calc(100vh - 32px);
  overflow: auto;
  border-radius: 18px;
  background: #111820;
  box-shadow: 0 28px 90px rgba(0, 0, 0, .5);
}

.tutorial-lightbox img {
  width: 100%;
  height: auto;
  display: block;
}

.tutorial-lightbox p {
  margin: 0;
  padding: 13px 56px 14px 16px;
  color: #eef2f5;
  font-size: 13px;
  line-height: 1.55;
}

.tutorial-lightbox-close {
  position: sticky;
  z-index: 2;
  top: 10px;
  float: right;
  width: 40px;
  height: 40px;
  display: grid;
  margin: 10px 10px -50px 0;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .26);
  border-radius: 50%;
  color: #fff;
  background: rgba(12, 18, 25, .82);
  font-size: 25px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 980px) {
  .tutorial-meta { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tutorial-chapter-nav { top: 76px; overflow-x: auto; }
  .tutorial-chapter-nav ol { width: max-content; grid-template-columns: repeat(6, 132px); }
  .tutorial-chapter-header { grid-template-columns: auto minmax(0, 1fr); }
  .tutorial-tool-cta { grid-column: 1 / -1; justify-self: start; }
  .tutorial-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tutorial-interpretation ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tutorial-gallery { grid-template-columns: minmax(0, 1fr); }
  .tutorial-image-button img { aspect-ratio: auto; object-fit: contain; }
}

@media (max-width: 640px) {
  .tutorial-page main { width: min(100% - 24px, 1280px); }
  .tutorial-page .site-header { align-items: flex-start; padding-right: 14px; padding-left: 14px; }
  .tutorial-page .site-header nav { gap: 12px; justify-content: flex-end; }
  .tutorial-page .site-header nav a { font-size: 11px; }
  .tutorial-hero { padding: 30px 22px; border-radius: 20px; }
  .tutorial-hero::after { width: 220px; height: 220px; }
  .tutorial-hero h1 { font-size: 38px; }
  .tutorial-lede { font-size: 15px; }
  .tutorial-hero-actions { display: grid; }
  .tutorial-primary-cta,
  .tutorial-secondary-cta { width: 100%; }
  .tutorial-meta { grid-template-columns: minmax(0, 1fr); margin-top: 30px; }
  .tutorial-meta > div { grid-template-columns: 88px minmax(0, 1fr); padding-top: 11px; }
  .tutorial-chapter-nav { top: 68px; margin-top: 14px; }
  .tutorial-content { gap: 18px; margin-top: 18px; }
  .tutorial-chapter { scroll-margin-top: 130px; padding: 22px 17px; border-radius: 18px; }
  .tutorial-chapter-header { grid-template-columns: 46px minmax(0, 1fr); gap: 13px; }
  .tutorial-chapter-index { width: 46px; height: 46px; border-radius: 14px; }
  .tutorial-chapter-copy h2 { font-size: 29px; }
  .tutorial-chapter-copy > p:last-child { font-size: 12px; }
  .tutorial-example { margin-bottom: 5px; font-size: 9px; }
  .tutorial-tool-cta { width: 100%; justify-self: stretch; }
  .tutorial-steps { grid-template-columns: minmax(0, 1fr); margin: 25px 0; }
  .tutorial-steps > li { min-height: 0; }
  .tutorial-interpretation { padding: 24px 0 26px; }
  .tutorial-interpretation > header { align-items: flex-start; flex-direction: column; gap: 8px; }
  .tutorial-interpretation ul { grid-template-columns: minmax(0, 1fr); }
  .tutorial-interpretation h3 { font-size: 28px; }
  .tutorial-interpretation > header > span { font-size: 12px; white-space: normal; }
  .tutorial-interpretation li { padding: 17px; }
  .tutorial-interpretation li strong { font-size: 17px; }
  .tutorial-interpretation li p { font-size: 15px; line-height: 1.68; }
  .tutorial-chapter-note,
  .tutorial-risk-note { grid-template-columns: minmax(0, 1fr); gap: 5px; }
  .tutorial-lightbox { width: calc(100vw - 12px); max-height: calc(100vh - 12px); }
  .tutorial-lightbox-panel { max-height: calc(100vh - 12px); border-radius: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .tutorial-page html { scroll-behavior: auto; }
  .tutorial-primary-cta,
  .tutorial-secondary-cta,
  .tutorial-tool-cta,
  .tutorial-image-button img { transition: none; }
}