:root {
  --paper: #f4eee7;
  --paper-deep: #ece3da;
  --surface: rgba(255, 251, 246, 0.82);
  --surface-soft: rgba(255, 251, 246, 0.64);
  --surface-strong: rgba(255, 251, 246, 0.94);
  --ink: #23181f;
  --muted: #655861;
  --soft: #8a7d86;
  --brand: #5b3d68;
  --brand-strong: #452a51;
  --brand-line: rgba(91, 61, 104, 0.22);
  --brand-wash: rgba(91, 61, 104, 0.08);
  --accent: #9d6d4b;
  --accent-deep: #81563b;
  --line: rgba(55, 37, 48, 0.12);
  --line-strong: rgba(55, 37, 48, 0.2);
  --shadow-lg: 0 30px 80px rgba(49, 33, 40, 0.12);
  --shadow-md: 0 16px 36px rgba(49, 33, 40, 0.08);
  --page-width: 1320px;
  --font-display: "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Mono", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.75;
  background:
    radial-gradient(circle at 14% 10%, rgba(91, 61, 104, 0.1), transparent 24%),
    radial-gradient(circle at 86% 16%, rgba(157, 109, 75, 0.08), transparent 20%),
    repeating-linear-gradient(
      0deg,
      rgba(91, 61, 104, 0.04) 0,
      rgba(91, 61, 104, 0.04) 1px,
      transparent 1px,
      transparent 88px
    ),
    linear-gradient(180deg, #faf6f0 0%, var(--paper) 44%, var(--paper-deep) 100%);
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0, rgba(91, 61, 104, 0.025) 50%, transparent 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 18%);
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -56px;
  z-index: 20;
  padding: 10px 14px;
  border: 1px solid var(--brand-line);
  background: var(--surface-strong);
  color: var(--brand-strong);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: var(--shadow-md);
}

.skip-link:focus-visible {
  top: 16px;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.08;
  text-wrap: balance;
}

code,
pre,
.mono {
  font-family: var(--font-mono);
}

.page {
  width: min(calc(100% - 32px), var(--page-width));
  margin: 16px auto 24px;
}

.page-frame {
  position: relative;
  overflow: hidden;
  padding: 28px clamp(18px, 2.8vw, 36px) 42px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.58), rgba(255, 251, 246, 0.46));
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
}

.page-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(91, 61, 104, 0.025) 0,
      rgba(91, 61, 104, 0.025) 1px,
      transparent 1px,
      transparent 108px
    );
}

.frame-corner {
  position: absolute;
  width: 24px;
  height: 24px;
  border-style: solid;
  border-color: var(--accent);
  opacity: 0.78;
}

.frame-corner.tl {
  top: 12px;
  left: 12px;
  border-width: 2px 0 0 2px;
}

.frame-corner.tr {
  top: 12px;
  right: 12px;
  border-width: 2px 2px 0 0;
}

.frame-corner.bl {
  bottom: 12px;
  left: 12px;
  border-width: 0 0 2px 2px;
}

.frame-corner.br {
  bottom: 12px;
  right: 12px;
  border-width: 0 2px 2px 0;
}

.issue-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-strong);
}

.issue-block,
.issue-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.issue-meta {
  justify-content: flex-end;
}

.issue-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--brand-line);
  background: var(--brand-wash);
  color: var(--brand-strong);
}

.issue-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}

.issue-kicker {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
  font-weight: 700;
}

.issue-note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--soft);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 16px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--brand-line);
  background: linear-gradient(160deg, var(--brand), var(--brand-strong));
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  box-shadow: 0 12px 26px rgba(69, 42, 81, 0.18);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong {
  font-size: 0.96rem;
  font-weight: 700;
}

.brand-copy span {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--soft);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
}

.nav-links a {
  padding: 8px 0;
  text-decoration: none;
  font-size: 0.92rem;
  color: var(--muted);
  border-bottom: 1px solid transparent;
}

.nav-links a:hover {
  color: var(--brand-strong);
  border-color: var(--brand-line);
}

a:focus-visible,
.btn:focus-visible,
.card-link:focus-visible,
.brand-link:focus-visible {
  outline: 3px solid rgba(91, 61, 104, 0.45);
  outline-offset: 3px;
}

.nav-links a[aria-current="page"] {
  color: var(--ink);
  border-color: var(--ink);
}

.nav-links .nav-cta {
  padding: 10px 14px;
  border: 1px solid var(--brand-line);
  background: rgba(255, 255, 255, 0.56);
  color: var(--brand-strong);
}

.editorial-main {
  padding-top: 24px;
}

.hero {
  padding: 6px 0 34px;
}

.hero-grid,
.spotlight-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(310px, 0.88fr);
  gap: 16px;
}

.hero-main,
.hero-side,
.editorial-card,
.spotlight-panel,
.module-card,
.cta-panel {
  position: relative;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.hero-main,
.spotlight-panel,
.cta-panel {
  padding: clamp(22px, 3vw, 34px);
}

.hero-side {
  display: grid;
  gap: 14px;
  padding: 18px;
  align-content: start;
}

.hero-main::before,
.hero-side::before,
.editorial-card::before,
.spotlight-panel::before,
.module-card::before,
.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-strong), rgba(91, 61, 104, 0));
}

.hero-tag,
.section-code,
.panel-label,
.card-index,
.module-key,
.detail-label,
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-strong);
}

.hero-tag::before,
.section-code::before,
.panel-label::before,
.module-key::before,
.detail-label::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-title {
  margin-top: 18px;
  max-width: 8.6ch;
  font-size: clamp(3.1rem, 7vw, 6.2rem);
  font-weight: 700;
  line-height: 1.02;
}

.title-line {
  display: block;
}

.title-strong,
.title-key {
  color: var(--brand-strong);
}

.hero-subtitle,
.section-intro,
.card-text,
.spotlight-text,
.module-desc,
.note-box,
.link-text,
.footer-note {
  color: var(--muted);
}

.hero-subtitle {
  margin-top: 18px;
  max-width: 40rem;
  font-size: clamp(1rem, 1.5vw, 1.08rem);
}

.hero-actions,
.cta-actions,
.link-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--brand-strong);
  color: #fff;
  box-shadow: 0 12px 26px rgba(69, 42, 81, 0.18);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--brand-strong);
  border-color: var(--brand-line);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.metric-card {
  padding: 14px 14px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.52);
}

.metric-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.04;
}

.metric-label {
  display: block;
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--soft);
}

.aside-panel {
  padding: 16px 16px 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.46);
}

.aside-label,
.note-box strong,
.card-link,
.summary-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-strong);
}

.editorial-list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-top: 12px;
  padding: 0;
}

.editorial-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--muted);
}

.editorial-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 0.62em;
  border-radius: 50%;
  background: var(--brand);
  flex-shrink: 0;
}

.section {
  padding: 34px 0 10px;
}

.section[id] {
  scroll-margin-top: 24px;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 30rem);
  gap: 18px;
  align-items: end;
  margin-bottom: 18px;
}

.section-heading {
  display: grid;
  gap: 10px;
}

.section-title {
  max-width: 11ch;
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.section-intro {
  max-width: 58ch;
  font-size: 1rem;
}

.card-grid,
.module-summary,
.module-list {
  display: grid;
  gap: 14px;
}

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

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

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

.grid-5,
.module-summary {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.editorial-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 100%;
  padding: 18px 18px 20px;
  background: var(--surface-soft);
}

.card-index {
  color: var(--accent-deep);
}

.card-title {
  font-size: 1.34rem;
}

.card-text,
.link-text,
.summary-copy {
  font-size: 0.95rem;
}

.spotlight-title {
  margin-top: 12px;
  max-width: 12ch;
  font-size: clamp(1.7rem, 2.2vw, 2.35rem);
}

.spotlight-text {
  margin-top: 10px;
  max-width: 48ch;
}

.chain-list {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding: 0;
}

.chain-list li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.chain-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.chain-step {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--soft);
}

.chain-body strong {
  display: block;
  font-size: 1rem;
}

.chain-body span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.92rem;
}

.tag-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.meta-chip,
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.56);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--brand-strong);
}

.summary-card {
  padding: 14px 14px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.48);
}

.summary-title {
  display: block;
  margin-bottom: 8px;
}

.summary-copy {
  color: var(--muted);
}

.module-card {
  padding: 20px 20px 18px;
}

.module-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 18px;
}

.module-meta {
  display: grid;
  align-content: start;
  gap: 10px;
  padding-right: 18px;
  border-right: 1px solid var(--line);
}

.module-title {
  font-size: 1.56rem;
}

.module-short {
  color: var(--muted);
  font-size: 0.94rem;
}

.module-copy {
  display: grid;
  gap: 12px;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.note-box {
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.52);
  font-size: 0.92rem;
}

.note-box strong {
  display: block;
  margin-bottom: 6px;
}

.link-card {
  min-height: 100%;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  text-decoration: none;
}

.card-link::after {
  content: ">";
  font-size: 0.86rem;
}

.cta-panel {
  margin-top: 18px;
}

.page-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
  color: var(--soft);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

@media (max-width: 1180px) {
  .grid-5,
  .module-summary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .module-layout {
    grid-template-columns: 1fr;
  }

  .module-meta {
    padding-right: 0;
    padding-bottom: 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 980px) {
  .issue-bar {
    grid-template-columns: 1fr;
  }

  .issue-title,
  .issue-meta {
    align-items: flex-start;
    justify-content: flex-start;
    text-align: left;
  }

  .site-nav,
  .hero-grid,
  .spotlight-grid,
  .section-head {
    grid-template-columns: 1fr;
  }

  .site-nav {
    display: grid;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  html {
    scroll-behavior: auto;
  }

  .page {
    width: min(calc(100% - 18px), var(--page-width));
    margin: 10px auto 18px;
  }

  .page-frame {
    padding: 18px 16px 28px;
  }

  .hero-title {
    max-width: none;
    font-size: clamp(2.7rem, 14vw, 4.2rem);
  }

  .section-title {
    max-width: none;
  }

  .metric-row,
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5,
  .module-summary,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions,
  .cta-actions,
  .link-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .nav-links {
    gap: 8px 14px;
  }
}

/* ===== v1.1 additions ===== */

/* Terminal mockup block */
.terminal-block {
  background: #1a1a2e;
  color: #e0e0e0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  padding: 18px 20px;
  border-radius: 6px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal-block .terminal-prompt {
  color: #4ade80;
}

.terminal-block .terminal-comment {
  color: #6b7280;
}

.terminal-block .terminal-output {
  color: #94a3b8;
}

/* Artifact card structure */
.artifact-card {
  display: grid;
  gap: 16px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.artifact-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.artifact-number {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.artifact-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.artifact-meta {
  display: grid;
  gap: 10px;
}

.artifact-meta-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 12px;
  align-items: start;
}

.artifact-meta-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--soft);
  padding-top: 2px;
}

.artifact-meta-value {
  font-size: 0.94rem;
  color: var(--muted);
}

.artifact-meta-value code {
  background: rgba(91, 61, 104, 0.06);
  padding: 2px 6px;
  font-size: 0.86rem;
}

.artifact-sample {
  background: #f8f6f3;
  border: 1px solid var(--line);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* User type entry cards */
.user-type-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.user-type-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.user-type-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.user-type-icon {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.user-type-title {
  font-size: 1.3rem;
  font-weight: 700;
}

.user-type-desc {
  font-size: 0.94rem;
  color: var(--muted);
}

.user-type-action {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-strong);
}

/* Workflow chain */
.workflow-chain {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.workflow-step {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  position: relative;
}

.workflow-step::after {
  content: "→";
  position: absolute;
  right: -14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--soft);
  font-size: 0.9rem;
  z-index: 2;
}

.workflow-step:last-child::after {
  display: none;
}

.workflow-step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.workflow-step-name {
  font-size: 1.1rem;
  font-weight: 700;
}

.workflow-step-io {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Step-by-step for quickstart */
.step-list {
  display: grid;
  gap: 28px;
}

.step-item {
  display: grid;
  gap: 12px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.step-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.step-badge {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--brand-strong);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.step-body {
  padding-left: 50px;
}

.step-body p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.step-body pre {
  margin: 0;
}

/* Before/After comparison */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.compare-panel {
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.compare-panel.before {
  background: rgba(0, 0, 0, 0.02);
  border-style: dashed;
}

.compare-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 12px;
}

.compare-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 14px;
}

/* Boundary block */
.boundary-block {
  padding: 28px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.02);
}

.boundary-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
  padding: 0;
}

.boundary-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid var(--line);
}

.boundary-item::before {
  content: "×";
  color: var(--soft);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
  flex-shrink: 0;
}

.boundary-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.boundary-content strong {
  font-size: 1rem;
  color: var(--ink);
}

.boundary-content span {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Compact artifact preview for homepage */
.artifact-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.artifact-preview-card {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.artifact-preview-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin-bottom: 10px;
}

.artifact-preview-sample {
  background: #f8f6f3;
  border: 1px solid var(--line);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ink);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 180px;
  overflow-y: auto;
}

/* Responsive for v1.1 additions */
@media (max-width: 1180px) {
  .workflow-chain {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .workflow-step:nth-child(3)::after {
    display: none;
  }
  .workflow-step:nth-child(6)::after {
    display: block;
  }
  .user-type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .workflow-chain {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .workflow-step::after {
    display: none;
  }
  .workflow-step:nth-child(2n)::after {
    display: none;
  }
  .user-type-grid {
    grid-template-columns: 1fr;
  }
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .boundary-list {
    grid-template-columns: 1fr;
  }
  .artifact-preview-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .workflow-chain {
    grid-template-columns: 1fr;
  }
  .step-body {
    padding-left: 0;
    padding-top: 12px;
  }
  .step-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ===== I/O block for scenario cards ===== */
.io-block {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 8px;
}
.io-row {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 12px;
  align-items: start;
}
.io-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-strong);
  padding-top: 2px;
}
.io-value {
  font-size: 0.9rem;
  color: var(--muted);
  word-break: break-all;
}
.io-value code {
  background: rgba(91, 61, 104, 0.06);
  padding: 2px 6px;
  font-size: 0.84rem;
}