:root {
  --bg: #f5efe4;
  --bg-alt: #fdf8f0;
  --surface: rgba(255, 251, 244, 0.82);
  --surface-strong: #fffdf8;
  --ink: #18343a;
  --muted: #5e7376;
  --line: rgba(24, 52, 58, 0.12);
  --accent: #1e7b6f;
  --accent-strong: #145449;
  --accent-soft: #d9efe8;
  --warm: #c98b48;
  --warm-soft: #f6ddbd;
  --shadow: 0 20px 50px rgba(35, 57, 60, 0.12);
  --radius: 28px;
  --radius-sm: 22px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(30, 123, 111, 0.16), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(201, 139, 72, 0.18), transparent 20%),
    linear-gradient(180deg, #f8f2e8 0%, #f3ecdf 48%, #f8f3eb 100%);
  font-family: "Space Grotesk", "Avenir Next", "Trebuchet MS", sans-serif;
}

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

a {
  color: inherit;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 64px;
}

.hero {
  padding: 22px 0 34px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 14px 18px;
  margin-top: 8px;
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 999px;
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand a,
.toplinks a,
.button,
.paper-link,
.chip-link,
.footer-link {
  text-decoration: none;
}

.toplinks {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
  flex: 1 1 auto;
}

.paper-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--ink);
  background: linear-gradient(135deg, rgba(255, 181, 98, 0.34), rgba(217, 239, 232, 0.72));
  border: 1px solid rgba(30, 123, 111, 0.18);
  box-shadow: 0 10px 24px rgba(41, 65, 73, 0.08);
  font-weight: 700;
  white-space: nowrap;
}

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

.paper-link-icon {
  position: relative;
  width: 14px;
  height: 16px;
  border: 1.6px solid currentColor;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.78);
  flex: 0 0 auto;
}

.paper-link-icon::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 6px;
  height: 6px;
  background: linear-gradient(135deg, transparent 49%, currentColor 50%);
}

.toplinks a {
  opacity: 0.82;
}

.toplinks a:hover,
.footer-link:hover {
  opacity: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.14fr) minmax(420px, 0.96fr);
  gap: 24px;
  margin-top: 22px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.section,
.panel-card,
.argument-card,
.example-entry,
.footer-card,
.code-block,
.callout,
.comparison-card {
  position: relative;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.hero h1,
.section h2,
.hero-stat strong,
.panel-card h3,
.argument-card h3,
.comparison-card h3 {
  font-family: "Source Serif 4", Georgia, serif;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.65rem, 4.8vw, 4.4rem);
  line-height: 0.96;
  margin: 0 0 16px;
  max-width: 22ch;
}

.hero-title-main {
  max-width: 30ch;
}

.hero-copy {
  min-width: 0;
}

.hero-head {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) clamp(176px, 17vw, 212px);
  gap: clamp(16px, 2.4vw, 26px);
  align-items: center;
  margin-bottom: 10px;
}

.hero-head .hero-title-main {
  margin-bottom: 0;
  max-width: 22ch;
}

.hero-art {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.hero-art img {
  display: block;
  width: min(100%, 224px);
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 16px 30px rgba(41, 65, 73, 0.12));
}

.lede {
  font-size: 1.08rem;
  line-height: 1.72;
  color: var(--muted);
  max-width: 64ch;
}

.hero-actions,
.chip-row,
.link-row,
.footer-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-actions {
  margin: 24px 0 20px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover,
.chip-link:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--ink);
  color: white;
  box-shadow: var(--shadow);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  border: 1px solid var(--line);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero-pills li,
.badge {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  font-size: 0.92rem;
}

.hero-panel {
  display: grid;
  gap: 16px;
  align-content: start;
}

.quick-start-card {
  padding: 22px 24px 24px;
}

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

.quick-start-card .example-entry {
  padding: 16px;
}

.quick-start-card .inline-code {
  padding: 14px 16px;
}

.section,
.panel-card,
.footer-card {
  background: var(--surface);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.58);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}

.panel-card,
.footer-card {
  padding: 22px;
}

.gradient-card {
  background:
    linear-gradient(145deg, rgba(30, 123, 111, 0.14), rgba(255, 251, 244, 0.96) 42%, rgba(201, 139, 72, 0.18)),
    var(--surface-strong);
}

.panel-label,
.example-label,
.mini-label {
  margin: 0 0 10px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.panel-card h3,
.argument-card h3,
.comparison-card h3 {
  margin: 0 0 10px;
  font-size: 1.45rem;
}

.panel-note,
.argument-card p,
.comparison-card p,
.callout p,
.footer-card p,
.section-heading p,
.section-side-note {
  color: var(--muted);
  line-height: 1.68;
}

.hero-stat-grid {
  display: grid;
  gap: 12px;
}

.hero-stat {
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.hero-stat strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.18rem;
}

.code-block {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  white-space: pre-wrap;
  line-height: 1.58;
  border-radius: 20px;
  background: rgba(20, 38, 43, 0.94);
  color: #f7f3ea;
}

.inline-code {
  margin: 0;
  padding: 12px 14px;
  overflow-x: auto;
  white-space: pre-wrap;
  line-height: 1.55;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  color: var(--ink);
}

.inline-code mjx-container {
  margin: 0 !important;
  font-size: 1.04em;
}

.inline-code mjx-container[display="true"] {
  display: block;
  text-align: center;
}

.section {
  padding: 30px;
  margin-top: 26px;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 0.96;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: 16px;
  align-items: end;
}

.section-side-note {
  align-self: center;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 20px;
  border: 1px solid var(--line);
}

.argument-grid,
.comparison-grid,
.two-col-grid,
.examples-grid {
  display: grid;
  gap: 16px;
}

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

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

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

.argument-card,
.comparison-card,
.example-entry,
.callout {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px;
}

.comparison-card {
  padding: 22px;
}

.calibration-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.calibration-flow-card {
  margin-bottom: 18px;
  padding: 26px 24px;
}

.workflow-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px minmax(0, 1fr) 52px minmax(0, 1fr);
  align-items: center;
}

.workflow-step {
  min-height: 150px;
  padding: 22px 24px 20px;
  border-radius: 26px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
  text-align: center;
}

.workflow-step-plain {
  background: rgba(255, 255, 255, 0.82);
}

.workflow-step-accent {
  background: rgba(217, 239, 232, 0.54);
}

.workflow-step-warm {
  background: rgba(246, 221, 189, 0.52);
}

.workflow-step-label {
  margin: 0 0 8px;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #111518;
  font-weight: 700;
}

.workflow-step h3 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 3.2vw, 2.65rem);
  line-height: 0.95;
  color: var(--ink);
}

.workflow-step p {
  margin: 0 auto;
  max-width: 22ch;
  color: var(--muted);
  line-height: 1.5;
  font-size: 1rem;
}

.workflow-connector {
  position: relative;
  height: 4px;
  margin: 0 2px;
  border-radius: 999px;
  background: rgba(24, 52, 58, 0.3);
}

.workflow-connector::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -1px;
  transform: translateY(-50%);
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 16px solid rgba(24, 52, 58, 0.42);
}

.calibration-card {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.calibration-card .panel-label {
  margin-bottom: 0;
}

.calibration-card h3 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.35rem);
  line-height: 1.02;
  max-width: 14ch;
}

.calibration-card .schematic-card {
  margin: 2px 0 4px;
  padding: 18px;
}

.calibration-card > p:last-child {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.65;
}

.schematic-card {
  margin: 14px 0;
  padding: 12px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.84), rgba(217, 239, 232, 0.34)),
    rgba(255, 255, 255, 0.8);
}

.schematic-svg {
  width: 100%;
  height: auto;
  display: block;
}

.axis-line {
  stroke: rgba(24, 52, 58, 0.46);
  stroke-width: 1.6;
}

.guide-line {
  stroke: rgba(24, 52, 58, 0.2);
  stroke-width: 1.5;
  stroke-dasharray: 6 5;
}

.raw-line {
  fill: none;
  stroke: var(--warm);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cal-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.axis-label,
.legend-label {
  fill: var(--muted);
  font-family: "Space Grotesk", "Avenir Next", "Trebuchet MS", sans-serif;
  font-size: 12px;
}

.calibration-summary {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.7;
}

.comparison-card ul,
.argument-card ul,
.footer-card ul,
.callout ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.65;
}

.comparison-card li,
.argument-card li,
.footer-card li,
.callout li {
  margin-bottom: 8px;
}

.example-entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.example-call {
  margin: 0;
  color: var(--ink);
  line-height: 1.56;
  overflow-x: auto;
  white-space: pre-wrap;
}

.chip-link {
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  font-weight: 700;
}

.callout {
  background:
    linear-gradient(145deg, rgba(30, 123, 111, 0.09), rgba(255, 255, 255, 0.84)),
    rgba(255, 255, 255, 0.8);
}

.footer-card {
  margin-top: 26px;
}

.companion-card {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 20px 22px;
  margin-top: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.84), rgba(217, 239, 232, 0.36)),
    rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
}

.companion-card-badge {
  width: 100%;
  height: auto;
  display: block;
}

.companion-card-copy h3 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 3vw, 2.2rem);
}

.companion-card-copy p:last-of-type {
  margin-bottom: 0;
}

.companion-card-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(30, 123, 111, 0.18);
  background: rgba(255, 255, 255, 0.84);
  font-weight: 700;
}

.footer-links {
  margin-top: 16px;
}

.footer-link {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  font-weight: 700;
}

.muted-note {
  font-size: 0.95rem;
  color: var(--muted);
}

@media (max-width: 980px) {
  .hero-grid,
  .split,
  .argument-grid,
  .comparison-grid,
  .calibration-grid,
  .two-col-grid,
  .examples-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-head {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .hero-art {
    justify-content: flex-start;
  }

  .quick-start-grid {
    grid-template-columns: 1fr;
  }

  .workflow-strip {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .workflow-connector {
    display: none;
  }

  .workflow-step {
    min-height: auto;
  }

  .calibration-card h3 {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100%, calc(100% - 20px));
  }

  .hero {
    padding-top: 16px;
  }

  .topbar,
  .section,
  .panel-card,
  .footer-card,
  .comparison-card,
  .argument-card,
  .callout,
  .calibration-card {
    border-radius: 24px;
  }

  .topbar {
    padding: 16px;
  }

  .hero h1 {
    max-width: none;
  }

  .argument-grid,
  .example-entry-grid {
    grid-template-columns: 1fr;
  }

  .companion-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .companion-card-badge {
    width: min(132px, 100%);
    margin: 0 auto;
  }

  .calibration-flow-card {
    padding: 18px;
  }

  .workflow-step {
    padding: 18px;
  }

  .button {
    width: 100%;
  }
}