.tutorial-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--color-border);
  background:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    var(--color-bg);
  background-size: 48px 48px;
}

.tutorial-hero::before {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 42%;
  content: "";
  border-left: 2px solid var(--color-accent-line);
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-transparent));
  clip-path: polygon(var(--cut-medium) 0, 100% 0, 100% 100%, 0 100%, 0 var(--cut-medium));
}

.tutorial-hero-grid {
  position: relative;
  z-index: 1;
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(440px, 0.78fr);
  align-items: center;
  gap: clamp(40px, 6vw, 92px);
  padding-top: clamp(72px, 9vw, 120px);
  padding-bottom: clamp(72px, 9vw, 120px);
}

.tutorial-hero-copy {
  max-width: 720px;
}

.tutorial-hero-copy .eyebrow {
  margin-bottom: 24px;
}

.tutorial-hero-copy h1 {
  max-width: 680px;
}

.tutorial-hero-copy .lead {
  max-width: 670px;
  margin: 28px 0 0;
}

.tutorial-hero-copy .button-row {
  margin-top: 32px;
}

.tutorial-hero-chips {
  margin-top: 28px;
}

.tutorial-route-board {
  position: relative;
  min-height: 450px;
  padding: 28px;
  overflow: hidden;
  border: 3px solid var(--color-border-bright);
  background: var(--color-panel);
  box-shadow: var(--shadow-accent);
  clip-path: polygon(0 0, calc(100% - var(--cut-medium)) 0, 100% var(--cut-medium), 100% 100%, var(--cut-medium) 100%, 0 calc(100% - var(--cut-medium)));
}

.tutorial-route-board::before {
  position: absolute;
  inset: 14px;
  content: "";
  border: 1px solid var(--color-border);
  pointer-events: none;
}

.tutorial-route-board::after {
  position: absolute;
  right: -70px;
  bottom: -105px;
  width: 290px;
  height: 290px;
  content: "";
  border: 18px solid var(--color-border);
  transform: rotate(45deg);
}

.tutorial-route-head {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.1em;
}

.tutorial-route-state {
  color: var(--color-success);
}

.tutorial-route-line {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  margin-top: 70px;
}

.tutorial-route-node {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  border: 3px solid var(--color-text);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  box-shadow: 0 0 0 6px var(--color-text-faint);
}

.tutorial-route-node.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  box-shadow: 0 0 0 6px var(--color-accent-soft);
}

.tutorial-route-node.is-end {
  border-color: var(--color-success);
  background: var(--color-success);
  box-shadow: 0 0 0 6px var(--color-success-soft);
}

.tutorial-route-segment {
  height: 5px;
  min-width: 0;
  flex: 1 1 auto;
  background: linear-gradient(90deg, var(--color-accent), var(--color-border-bright));
}

.tutorial-route-labels {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 14px 0 0;
  padding: 0;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  list-style: none;
  text-align: center;
}

.tutorial-route-labels li:first-child {
  text-align: left;
}

.tutorial-route-labels li:last-child {
  text-align: right;
}

.tutorial-gate-mark {
  position: absolute;
  right: 48px;
  bottom: 12px;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  color: var(--color-transparent);
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 0.8;
  -webkit-text-stroke: 5px var(--color-border);
}

.tutorial-gate-zero {
  font-size: 190px;
}

.tutorial-gate-three {
  margin-left: -24px;
  font-size: 154px;
  transform: translateY(-4px);
}

.tutorial-intro {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.tutorial-intro .callout {
  margin-top: 0;
  margin-bottom: 0;
}

.tutorial-content-section {
  position: relative;
}

.guide-frame {
  position: relative;
}

.guide-frame > .toc-tabs {
  margin-bottom: 58px;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 320px);
  align-items: start;
  gap: clamp(34px, 5vw, 72px);
}

.guide-main {
  min-width: 0;
  counter-reset: guide-step;
}

.guide-step {
  position: relative;
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: clamp(70px, 9vw, 118px);
  counter-increment: guide-step;
}

.guide-step:last-child {
  padding-bottom: 0;
}

.guide-step::before {
  position: absolute;
  top: 44px;
  bottom: 0;
  left: 21px;
  width: 5px;
  content: "";
  background: linear-gradient(var(--color-accent), var(--color-border));
}

.guide-step:last-child::before {
  display: none;
}

.guide-step-marker {
  position: relative;
  z-index: 2;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 3px solid var(--color-accent);
  background: var(--color-bg);
  box-shadow: 5px 5px 0 var(--color-accent-dark);
}

.guide-step-marker::before {
  content: counter(guide-step);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 850;
}

.guide-step-body {
  min-width: 0;
  padding: clamp(24px, 3vw, 38px);
  border: 2px solid var(--color-border);
  background: var(--color-panel);
  box-shadow: var(--shadow-hard);
  clip-path: polygon(0 0, calc(100% - var(--cut-medium)) 0, 100% var(--cut-medium), 100% 100%, var(--cut-medium) 100%, 0 calc(100% - var(--cut-medium)));
}

.guide-step-body::before {
  display: block;
  width: 68px;
  height: 5px;
  margin: calc(clamp(24px, 3vw, 38px) * -1) 0 clamp(22px, 3vw, 34px);
  content: "";
  background: var(--color-accent);
}

.guide-step-label,
.platform-instruction-code,
.guide-side-label,
.verification-state {
  display: inline-block;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.guide-step-body h2 {
  margin-top: 8px;
}

.guide-step-body > p,
.platform-instruction p,
.verification-item p {
  color: var(--color-text-soft);
}

.guide-step-body > p {
  margin-bottom: 20px;
}

.guide-step-body > p:last-of-type {
  margin-bottom: 0;
}

.guide-step-body > .button-row {
  margin-top: 30px;
}

.guide-step-body pre {
  margin: 24px 0;
}

.guide-step-body a:not(.button) {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.platform-instruction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 32px;
}

.platform-instruction {
  min-width: 0;
  padding: 24px;
  border: 2px solid var(--color-border);
  background:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    var(--color-panel-strong);
  background-size: 28px 28px;
  box-shadow: 6px 6px 0 var(--color-black);
}

.platform-instruction-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.platform-instruction-head h3 {
  margin: 3px 0 0;
  font-size: 23px;
}

.platform-instruction p {
  margin-bottom: 16px;
  font-size: 14px;
}

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

.verification-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 32px;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: var(--shadow-hard);
}

.verification-item {
  min-width: 0;
  padding: 22px;
  border-left: 1px solid var(--color-border);
}

.verification-item:first-child {
  border-left: 0;
}

.verification-state {
  margin-bottom: 10px;
  color: var(--color-success);
}

.verification-item strong {
  display: block;
  margin-bottom: 8px;
}

.verification-item p {
  margin-bottom: 0;
  font-size: 13px;
}

.guide-side {
  position: sticky;
  top: calc(var(--toc-top) + var(--toc-height) + 24px);
}

.guide-side-panel {
  position: relative;
  padding: 26px;
  border: 2px solid var(--color-border);
  background: var(--color-panel-strong);
  box-shadow: var(--shadow-accent);
  clip-path: polygon(0 0, calc(100% - var(--cut-medium)) 0, 100% var(--cut-medium), 100% 100%, var(--cut-medium) 100%, 0 calc(100% - var(--cut-medium)));
}

.guide-side-panel::before {
  position: absolute;
  top: -2px;
  left: 24px;
  width: 72px;
  height: 5px;
  content: "";
  background: var(--color-accent);
}

.guide-side-panel h2 {
  margin: 8px 0 22px;
  font-size: 26px;
}

.guide-facts {
  margin: 0 0 24px;
}

.guide-facts div {
  padding: 14px 0;
  border-top: 1px solid var(--color-border);
}

.guide-facts dt {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.guide-facts dd {
  margin: 5px 0 0;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
}

.guide-side-panel .button {
  width: 100%;
}

@media (max-width: 1080px) {
  .tutorial-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(370px, 0.72fr);
  }

  .guide-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-side {
    position: static;
  }

  .guide-side-panel {
    max-width: 760px;
    margin-left: 92px;
  }
}

@media (max-width: 860px) {
  .tutorial-hero::before {
    width: 100%;
    border-left: 0;
    opacity: 0.5;
  }

  .tutorial-hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .tutorial-route-board {
    min-height: 360px;
  }

  .tutorial-gate-zero {
    font-size: 154px;
  }

  .tutorial-gate-three {
    font-size: 126px;
  }

  .platform-instruction-grid,
  .verification-strip {
    grid-template-columns: 1fr;
  }

  .verification-item {
    border-top: 1px solid var(--color-border);
    border-left: 0;
  }

  .verification-item:first-child {
    border-top: 0;
  }
}

@media (max-width: 768px) {
  .tutorial-gate-mark {
    display: none;
  }

  .tutorial-route-board {
    min-height: 300px;
  }

  .tutorial-route-line {
    margin-top: 60px;
  }

  .guide-frame > .toc-tabs {
    margin-bottom: 42px;
  }
}

@media (max-width: 640px) {
  .tutorial-hero-grid {
    gap: 36px;
    padding-top: 52px;
    padding-bottom: 58px;
  }

  .tutorial-route-board {
    min-height: 250px;
    padding: 22px;
    box-shadow: 6px 6px 0 var(--color-accent-dark);
  }

  .tutorial-route-head {
    font-size: 9px;
  }

  .tutorial-route-line {
    margin-top: 48px;
  }

  .tutorial-route-node {
    width: 15px;
    height: 15px;
  }

  .tutorial-route-labels {
    font-size: 9px;
  }

  .guide-step {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
  }

  .guide-step::before {
    top: 38px;
    left: 16px;
    width: 3px;
  }

  .guide-step-marker {
    width: 36px;
    height: 36px;
    border-width: 2px;
    box-shadow: 3px 3px 0 var(--color-accent-dark);
  }

  .guide-step-marker::before {
    font-size: 14px;
  }

  .guide-step-body {
    padding: 20px;
    box-shadow: 5px 5px 0 var(--color-black);
  }

  .guide-step-body::before {
    width: 52px;
    margin: -20px 0 22px;
  }

  .platform-instruction {
    padding: 20px;
    box-shadow: 4px 4px 0 var(--color-black);
  }

  .platform-instruction-head {
    align-items: flex-start;
  }

  .guide-side-panel {
    margin-left: 54px;
    padding: 22px;
    box-shadow: 6px 6px 0 var(--color-accent-dark);
  }
}

@media (max-width: 390px) {
  .tutorial-route-labels {
    display: none;
  }

  .guide-step {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 9px;
  }

  .guide-step::before {
    left: 13px;
  }

  .guide-step-marker {
    width: 30px;
    height: 30px;
  }

  .guide-step-marker::before {
    font-size: 12px;
  }

  .guide-step-body {
    padding: 18px;
  }

  .guide-step-body::before {
    margin: -18px 0 20px;
  }

  .guide-side-panel {
    margin-left: 43px;
  }
}