:root {
  color-scheme: light;
  --ink: #17211b;
  --muted: #536159;
  --paper: #fffdf8;
  --canvas: #f1f4ed;
  --line: #c7d1c8;
  --forest: #174f3a;
  --forest-dark: #0e3828;
  --mint: #dff2e5;
  --sun: #f2b84b;
  --sun-light: #fff1c9;
  --danger: #8a2f24;
  --shadow: 0 18px 48px rgba(23, 52, 38, 0.11);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 100%;
  line-height: 1.55;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

button,
input[type="file"],
input[type="radio"] {
  cursor: pointer;
}

a {
  color: var(--forest-dark);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

:focus-visible {
  outline: 3px solid #1a67c8;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 0.55rem;
  background: var(--paper);
  box-shadow: var(--shadow);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.hero {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 4%, rgba(242, 184, 75, 0.27), transparent 28rem),
    linear-gradient(145deg, #f9f8ee 0%, #e4f2e8 100%);
  padding: clamp(3.5rem, 8vw, 7rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(18rem, 0.8fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}

.eyebrow,
.step-label {
  margin: 0 0 0.65rem;
  color: var(--forest);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 15ch;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.7rem, 7vw, 5.8rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.75rem, 3.6vw, 2.8rem);
  line-height: 1.08;
}

.lede {
  max-width: 44rem;
  margin: 1.5rem 0;
  color: #344239;
  font-size: clamp(1.08rem, 2.1vw, 1.35rem);
}

.trust-line {
  max-width: 46rem;
  padding: 1rem 1.15rem;
  border-left: 5px solid var(--forest);
  background: rgba(255, 255, 255, 0.7);
}

.protocol-card,
.builder-card,
.guide-card {
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.protocol-card {
  padding: 1.4rem;
}

.protocol-card h2 {
  font-family: inherit;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.protocol-card dl {
  margin: 1rem 0 0;
}

.protocol-card dl div {
  display: grid;
  grid-template-columns: 5.8rem minmax(0, 1fr);
  gap: 0.65rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
}

.protocol-card dt {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.protocol-card dd {
  margin: 0;
  font-weight: 650;
}

.protocol-card code {
  font-size: 0.76rem;
  word-break: break-all;
}

.main-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(18rem, 0.75fr);
  gap: 1.5rem;
  align-items: start;
  padding-block: clamp(2rem, 5vw, 4.5rem);
}

.builder-card,
.guide-card {
  padding: clamp(1.25rem, 3vw, 2.2rem);
}

.guide-card {
  position: sticky;
  top: 1rem;
}

.section-heading {
  margin-bottom: 1.6rem;
}

.field-group,
.depth-picker {
  margin-top: 1.6rem;
}

.label-row {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

label,
legend {
  font-weight: 750;
}

.step-number {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  margin-right: 0.45rem;
  place-items: center;
  border-radius: 50%;
  background: var(--forest);
  color: #fff;
  font-weight: 800;
}

textarea {
  width: 100%;
  margin-top: 0.7rem;
  padding: 1rem;
  resize: vertical;
  border: 2px solid #9baaa0;
  border-radius: 0.75rem;
  background: #fff;
  color: var(--ink);
  line-height: 1.5;
}

textarea:focus {
  border-color: var(--forest);
}

input[type="file"] {
  display: block;
  width: 100%;
  margin-top: 0.7rem;
  padding: 0.9rem;
  border: 2px dashed #87988c;
  border-radius: 0.75rem;
  background: #fff;
}

.hint {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.file-list {
  display: grid;
  gap: 0.55rem;
  margin: 0.8rem 0 0;
  padding: 0;
  list-style: none;
}

.file-list li {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0.8rem;
  border-radius: 0.65rem;
  background: var(--mint);
}

.file-list small {
  display: block;
  color: var(--muted);
}

.file-list button {
  min-width: 2.75rem;
  min-height: 2.75rem;
  border: 0;
  border-radius: 0.55rem;
  background: #fff;
  color: var(--danger);
  font-weight: 800;
}

.depth-picker {
  padding: 0;
  border: 0;
}

.depth-picker legend {
  margin-bottom: 0.8rem;
}

.depth-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

.depth-grid label {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.9rem;
  border: 2px solid var(--line);
  border-radius: 0.75rem;
  background: #fff;
}

.depth-grid label:has(input:checked) {
  border-color: var(--forest);
  background: var(--mint);
}

.depth-grid input {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.1rem;
  accent-color: var(--forest);
}

.depth-grid small {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-weight: 450;
}

.action-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.7rem;
  padding: 1rem;
  border-radius: 0.85rem;
  background: #e9eee8;
}

.button {
  min-height: 2.75rem;
  padding: 0.68rem 1rem;
  border: 2px solid transparent;
  border-radius: 0.65rem;
  font-weight: 800;
}

.button-primary {
  background: var(--forest);
  color: #fff;
}

.button-primary:hover:not(:disabled) {
  background: var(--forest-dark);
}

.button-secondary {
  border-color: var(--forest);
  background: #fff;
  color: var(--forest-dark);
}

.button-quiet {
  border-color: #aab6ad;
  background: transparent;
  color: var(--ink);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.status {
  min-height: 1.5rem;
  margin: 0.8rem 0 0;
  color: var(--forest-dark);
  font-weight: 700;
}

.status[data-error="true"] {
  color: var(--danger);
}

.preview-panel {
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.preview-panel summary {
  cursor: pointer;
  font-weight: 800;
}

.preview-panel label {
  display: block;
  margin-top: 1rem;
}

.next-steps {
  padding-left: 1.25rem;
}

.next-steps li + li {
  margin-top: 0.8rem;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 1.4rem;
  border-bottom: 1px solid var(--line);
}

.tab-list button {
  min-height: 2.75rem;
  padding: 0.55rem 0.7rem;
  border: 0;
  border-bottom: 4px solid transparent;
  background: transparent;
  color: var(--muted);
  font-weight: 750;
}

.tab-list button[aria-selected="true"] {
  border-bottom-color: var(--sun);
  color: var(--ink);
}

[role="tabpanel"] {
  padding: 0.8rem 0;
}

.starter-message {
  padding: 0.9rem;
  border-radius: 0.75rem;
  background: var(--sun-light);
}

.starter-message code {
  display: block;
  margin-bottom: 0.8rem;
  white-space: normal;
}

.demo-section,
.limits-section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.demo-section {
  background: var(--forest-dark);
  color: #f8fff9;
}

.demo-section .step-label {
  color: #aee3c3;
}

.demo-section .button-quiet {
  border-color: #b6d4c1;
  color: #fff;
}

.demo-heading-row,
.limits-grid,
.footer-grid {
  display: flex;
  gap: 2rem;
  align-items: center;
  justify-content: space-between;
}

.demo-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.demo-steps li {
  min-height: 9rem;
  padding: 1rem;
  border: 1px solid #587463;
  border-radius: 0.8rem;
  background: rgba(255, 255, 255, 0.06);
  transition: transform 200ms ease, background 200ms ease, color 200ms ease;
}

.demo-steps li[data-active="true"] {
  transform: translateY(-0.45rem);
  border-color: var(--sun);
  background: var(--sun);
  color: #1d2a21;
}

.demo-steps span,
.demo-steps strong,
.demo-steps small {
  display: block;
}

.demo-steps span {
  margin-bottom: 1.4rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
}

.demo-steps small {
  margin-top: 0.35rem;
}

.limits-section {
  background: var(--sun-light);
}

.limits-grid > * {
  flex: 1;
}

footer {
  padding: 2rem 0;
  background: #101914;
  color: #edf7ef;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

footer a {
  color: #c8ebd4;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.noscript {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  z-index: 10;
  padding: 1rem;
  border: 3px solid var(--danger);
  background: #fff;
  color: var(--danger);
  font-weight: 800;
}

@media (max-width: 850px) {
  .hero-grid,
  .main-layout {
    grid-template-columns: 1fr;
  }

  .guide-card {
    position: static;
  }

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

  .demo-heading-row,
  .limits-grid,
  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100% - 1rem, 1180px);
  }

  .hero {
    padding-top: 3rem;
  }

  .builder-card,
  .guide-card,
  .protocol-card {
    border-radius: 0.75rem;
  }

  .label-row,
  .action-panel {
    align-items: stretch;
    flex-direction: column;
  }

  .depth-grid,
  .demo-steps {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (forced-colors: active) {
  .step-number,
  .button-primary {
    border: 2px solid ButtonText;
  }
}

@media print {
  .action-panel,
  .demo-section,
  footer,
  .skip-link {
    display: none;
  }

  body,
  .hero,
  .limits-section {
    background: #fff;
  }

  .main-layout {
    display: block;
  }

  .guide-card {
    margin-top: 1rem;
  }
}