:root {
  --bg: #f5efe4;
  --paper: rgba(255, 251, 244, 0.74);
  --paper-strong: #fffaf0;
  --ink: #17221e;
  --muted: #5f645c;
  --line: rgba(23, 34, 30, 0.12);
  --accent: #0e8272;
  --accent-soft: rgba(14, 130, 114, 0.14);
  --accent-warm: #d86f38;
  --accent-warm-soft: rgba(216, 111, 56, 0.14);
  --shadow: 0 20px 60px rgba(33, 31, 27, 0.12);
  --headline: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, serif;
  --body: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(216, 111, 56, 0.15), transparent 30%),
    radial-gradient(circle at top right, rgba(14, 130, 114, 0.18), transparent 32%),
    linear-gradient(180deg, #f8f4ea 0%, #efe6d7 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(23, 34, 30, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 34, 30, 0.04) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.22), transparent 70%);
}

.page-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 72px;
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 10;
  margin-top: 16px;
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  background: rgba(255, 250, 240, 0.72);
  border: 1px solid rgba(23, 34, 30, 0.08);
  backdrop-filter: blur(18px);
  border-radius: 999px;
  box-shadow: var(--shadow);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #1a5048);
  color: #fff9f0;
  font-family: var(--headline);
  font-size: 1.15rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.86rem;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 26px;
  align-items: end;
  min-height: calc(100svh - 130px);
  padding: 56px 0 28px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.73rem;
  color: var(--accent);
  margin: 0 0 12px;
}

.hero h1,
.section-intro h2,
.compare-band h2,
.final-cta h2 {
  font-family: var(--headline);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 0.95;
  margin: 0;
}

.hero h1 {
  font-size: clamp(3.2rem, 8vw, 6.7rem);
  max-width: 9ch;
}

.hero-lead,
.section-intro + p,
.compare-band p,
.final-cta p,
.mode p,
.step p,
.assistant-panel,
.error-item p,
.micro-note {
  color: var(--muted);
}

.hero-lead {
  max-width: 60ch;
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 20px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.primary-link,
.secondary-link,
.ghost-link {
  padding: 14px 20px;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 600;
}

.primary-link {
  background: var(--ink);
  color: #fffaf0;
}

.secondary-link {
  color: var(--ink);
  background: rgba(255, 250, 240, 0.72);
  border: 1px solid var(--line);
}

.ghost-link {
  color: var(--accent);
  background: transparent;
  border: 1px solid rgba(14, 130, 114, 0.2);
}

.hero-panel,
.assistant-panel,
.final-cta,
.compare-band,
.fork-diagram,
.error-item,
.mode-strip,
.cheatsheet,
.session-map,
.section-grid {
  position: relative;
}

.hero-panel {
  padding: 26px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 250, 240, 0.84), rgba(247, 239, 226, 0.92));
  border: 1px solid rgba(23, 34, 30, 0.08);
  box-shadow: var(--shadow);
}

.status-band {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.status-band span {
  color: var(--muted);
}

.command-stack {
  display: grid;
  gap: 14px;
}

.command-stack article {
  padding: 14px 0;
  border-bottom: 1px solid rgba(23, 34, 30, 0.08);
}

.command-stack article:last-child {
  border-bottom: 0;
}

.command-stack span {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 6px;
}

code,
pre {
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
}

code {
  display: inline-block;
  background: rgba(23, 34, 30, 0.06);
  padding: 0.18rem 0.42rem;
  border-radius: 0.45rem;
  color: var(--ink);
}

.command-stack code,
.error-item code,
.step code,
.final-cta code {
  font-size: 0.9rem;
}

section {
  margin-top: 84px;
}

.section-intro {
  margin-bottom: 28px;
}

.section-intro h2,
.compare-band h2,
.final-cta h2 {
  font-size: clamp(2.1rem, 4vw, 4.2rem);
  max-width: 13ch;
}

.mode-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.mode {
  padding: 24px;
  border-top: 2px solid var(--ink);
  background: linear-gradient(180deg, rgba(255, 250, 240, 0.72), rgba(255, 250, 240, 0.32));
}

.mode h3 {
  font-family: var(--headline);
  font-size: 2rem;
  margin: 0 0 10px;
}

.mode-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  margin-bottom: 10px;
}

.mode-native {
  border-color: var(--ink);
}

.mode-glm {
  border-color: var(--accent);
}

.mode-turbo {
  border-color: var(--accent-warm);
}

.compare-band {
  padding: 32px;
  border-radius: 30px;
  background: rgba(255, 251, 244, 0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.setup-banner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
  padding: 30px 32px;
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(14, 130, 114, 0.08), rgba(216, 111, 56, 0.08));
  border: 1px solid var(--line);
}

.setup-banner-actions p {
  margin-top: 0;
  color: var(--muted);
  line-height: 1.6;
}

.compare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.compare-columns article {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.compare-columns h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.compare-columns ul,
.rule-grid,
.error-list {
  margin: 0;
  padding: 0;
}

.compare-columns li,
.rule-grid article,
.error-item div {
  list-style: none;
}

.compare-columns li + li {
  margin-top: 10px;
}

.timeline {
  display: grid;
  gap: 18px;
}

.step {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  align-items: start;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.step-no {
  font-family: var(--headline);
  font-size: 2rem;
  color: var(--accent);
}

.step h3 {
  font-size: 1.2rem;
  margin: 0 0 8px;
}

.fork-diagram {
  margin-top: 32px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: center;
}

.fork-diagram article,
.diagram-arrow {
  padding: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 251, 244, 0.78);
}

.diagram-arrow {
  border-radius: 999px;
  background: var(--accent);
  color: #fffaf0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

.diagram-label {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 8px;
}

.assistant-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding: 28px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(18, 27, 24, 0.96), rgba(30, 43, 39, 0.94));
  color: #fbf6ee;
  box-shadow: var(--shadow);
}

.assistant-panel label {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.assistant-panel span {
  color: rgba(251, 246, 238, 0.78);
  font-size: 0.88rem;
}

.assistant-panel select,
.assistant-panel input {
  width: 100%;
  border: 1px solid rgba(251, 246, 238, 0.12);
  background: rgba(251, 246, 238, 0.08);
  color: #fbf6ee;
  padding: 14px 16px;
  border-radius: 16px;
  font: inherit;
}

.command-output {
  grid-column: 1 / -1;
  padding-top: 8px;
}

.output-label {
  margin: 0 0 8px;
  color: rgba(251, 246, 238, 0.72);
}

.command-output pre {
  margin: 0;
  padding: 18px;
  border-radius: 18px;
  overflow-x: auto;
  background: rgba(255, 250, 240, 0.08);
  border: 1px solid rgba(251, 246, 238, 0.1);
}

.command-output code {
  background: transparent;
  padding: 0;
  color: #fbf6ee;
}

.cheatsheet {
  padding: 28px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.rule-grid article {
  padding: 8px 0;
}

.rule-grid h3 {
  font-family: var(--headline);
  font-size: 1.6rem;
  margin: 0 0 8px;
}

.error-list {
  display: grid;
  gap: 12px;
}

.error-item {
  background: rgba(255, 251, 244, 0.78);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}

.error-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 20px;
  font-weight: 700;
}

.error-item summary::-webkit-details-marker {
  display: none;
}

.error-item div {
  padding: 0 20px 20px;
}

.error-item code {
  display: block;
  margin-top: 10px;
  width: fit-content;
}

.final-cta {
  padding: 52px 0 12px;
  border-top: 1px solid var(--line);
}

.final-cta p:last-child {
  max-width: 64ch;
  font-size: 1.02rem;
  line-height: 1.7;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.08s;
}

.delay-2 {
  transition-delay: 0.16s;
}

.delay-3 {
  transition-delay: 0.24s;
}

.delay-4 {
  transition-delay: 0.32s;
}

.delay-5 {
  transition-delay: 0.4s;
}

.config-page {
  background:
    radial-gradient(circle at top left, rgba(14, 130, 114, 0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(216, 111, 56, 0.18), transparent 32%),
    linear-gradient(180deg, #1d201f 0%, #2b2621 100%);
  color: #f8efe1;
}

.config-page::before {
  background-image:
    linear-gradient(rgba(255, 250, 240, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 250, 240, 0.06) 1px, transparent 1px);
}

.config-header {
  background: rgba(29, 32, 31, 0.7);
  border-color: rgba(255, 250, 240, 0.08);
}

.config-page .brand,
.config-page .top-nav a,
.config-page .brand-text span,
.config-page .hero-lead,
.config-page .summary-title,
.config-page .config-summary li,
.config-page .manual-grid p,
.config-page .config-footer p {
  color: rgba(248, 239, 225, 0.8);
}

.warm {
  background: linear-gradient(135deg, var(--accent-warm), #7a2f16);
}

.config-hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 26px;
  min-height: calc(100svh - 140px);
  align-items: end;
  padding: 56px 0 24px;
}

.config-hero h1 {
  font-family: var(--headline);
  font-size: clamp(3rem, 7vw, 6rem);
  line-height: 0.96;
  letter-spacing: -0.03em;
  margin: 0;
  max-width: 10ch;
}

.config-summary {
  padding: 24px;
  border-radius: 28px;
  background: rgba(255, 250, 240, 0.08);
  border: 1px solid rgba(255, 250, 240, 0.1);
  backdrop-filter: blur(12px);
}

.summary-title {
  margin-top: 0;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
}

.config-summary ul {
  margin: 0;
  padding-left: 18px;
}

.config-summary li + li {
  margin-top: 10px;
}

.tab-shell {
  padding: 28px;
  border-radius: 28px;
  background: rgba(255, 250, 240, 0.92);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.tab-button {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(23, 34, 30, 0.03);
  color: var(--ink);
  padding: 12px 16px;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}

.tab-button.is-active {
  background: var(--ink);
  color: #fffaf0;
}

.manual-steps {
  display: grid;
  gap: 16px;
}

.manual-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.manual-step span {
  font-family: var(--headline);
  font-size: 1.9rem;
  color: var(--accent);
}

.manual-step h3,
.manual-grid h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.manual-step pre {
  margin: 0;
  padding: 16px;
  border-radius: 18px;
  overflow-x: auto;
  background: rgba(23, 34, 30, 0.04);
  border: 1px solid rgba(23, 34, 30, 0.08);
}

.manual-step code {
  background: transparent;
  padding: 0;
}

.manual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.manual-grid article {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.config-footer {
  padding: 52px 0 12px;
  border-top: 1px solid rgba(255, 250, 240, 0.12);
}

.config-footer h2 {
  font-family: var(--headline);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 0.96;
  max-width: 12ch;
  margin: 0 0 12px;
}

@media (max-width: 960px) {
  .site-header,
  .hero,
  .mode-strip,
  .compare-columns,
  .assistant-panel,
  .rule-grid,
  .fork-diagram,
  .setup-banner,
  .config-hero,
  .manual-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    border-radius: 28px;
    align-items: flex-start;
  }

  .top-nav {
    width: 100%;
  }

  .hero {
    min-height: auto;
    padding-top: 36px;
  }

  .hero h1 {
    max-width: 11ch;
  }

  .fork-diagram {
    gap: 12px;
  }

  .manual-step {
    grid-template-columns: 1fr;
  }

  .diagram-arrow {
    justify-self: start;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1200px);
  }

  .site-header {
    top: 10px;
    padding: 14px;
  }

  .hero-panel,
  .compare-band,
  .assistant-panel,
  .cheatsheet {
    padding: 20px;
  }

  .section-intro h2,
  .compare-band h2,
  .final-cta h2 {
    max-width: none;
  }

  .step {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}