:root {
  --bg: #f5f7f2;
  --bg-grid: #dde6df;
  --ink: #17211f;
  --muted: #596866;
  --surface: #ffffff;
  --surface-2: #edf3ef;
  --surface-3: #f8faf8;
  --line: #cfdbd6;
  --teal: #087f74;
  --teal-dark: #075e58;
  --coral: #ca4f3d;
  --gold: #dca52c;
  --blue: #325da8;
  --shadow: 0 18px 42px rgba(22, 36, 33, 0.12);
  --radius: 8px;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

[data-theme="contrast"] {
  --bg: #0f1413;
  --bg-grid: #26312f;
  --ink: #f5f8f6;
  --muted: #b3c2bf;
  --surface: #171f1d;
  --surface-2: #202a27;
  --surface-3: #101614;
  --line: #35443f;
  --teal: #78d5c9;
  --teal-dark: #9ce4db;
  --coral: #ff8b76;
  --gold: #f0c66a;
  --blue: #8badff;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px),
    var(--bg);
  background-size: 36px 36px;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.5;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  content: "";
}

body,
button,
input,
textarea {
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 40;
  transform: translateY(-150%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0.65rem 0.85rem;
  box-shadow: var(--shadow);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0.8rem 0;
  gap: 1rem;
}

.brand,
.nav-actions,
.quick-actions,
.question-bank,
.mode-picker,
.sample-actions,
.export-actions,
.starter-list {
  display: flex;
  align-items: center;
}

.brand {
  min-width: 0;
  gap: 0.65rem;
  font-weight: 850;
}

.brand-mark {
  display: grid;
  flex: 0 0 2.35rem;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.82rem;
  font-weight: 900;
}

.nav-actions {
  gap: 0.35rem;
}

.nav-actions a,
.nav-button {
  display: inline-flex;
  min-height: 2.35rem;
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.94rem;
  font-weight: 750;
  padding: 0 0.72rem;
}

.nav-actions a:hover,
.nav-actions a:focus-visible,
.nav-button:hover,
.nav-button:focus-visible {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
  outline: none;
}

.hero,
.studio-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(300px, 0.78fr) minmax(260px, 0.56fr);
  gap: 1.2rem;
  align-items: stretch;
  padding: 2.4rem 0 1.6rem;
}

.hero-copy {
  min-width: 0;
  align-self: center;
  padding: 0.6rem 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.7rem;
  color: var(--coral);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p,
ol,
pre {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 0.75rem;
  font-family: var(--serif);
  font-size: 4.65rem;
  font-weight: 500;
  line-height: 0.98;
}

h2 {
  margin-bottom: 0.7rem;
  font-family: var(--serif);
  font-size: 2.65rem;
  font-weight: 500;
  line-height: 1.04;
}

h3 {
  margin-bottom: 0.45rem;
  font-size: 1.35rem;
  line-height: 1.18;
}

h4 {
  margin-bottom: 0.2rem;
  font-size: 1rem;
}

.lede {
  max-width: 650px;
  color: var(--muted);
  font-size: 1.08rem;
}

.quick-actions {
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.2rem;
}

.button {
  display: inline-flex;
  min-height: 2.7rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 850;
  padding: 0.68rem 1rem;
  text-align: center;
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  outline: none;
  transform: translateY(-1px);
}

.button-primary {
  background: var(--teal);
  color: #ffffff;
}

[data-theme="contrast"] .button-primary {
  color: #09100f;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--teal-dark);
}

.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--teal);
}

.hero-visual {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-height: 320px;
  overflow: hidden;
  align-self: stretch;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  min-height: 245px;
  object-fit: cover;
}

.hero-visual figcaption {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 0.95rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-visual strong {
  color: var(--ink);
}

.progress-panel {
  display: grid;
  align-content: start;
  gap: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.progress-panel h2 {
  font-size: 1.75rem;
}

.progress-meter {
  position: relative;
  display: flex;
  min-height: 4.6rem;
  align-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface-2);
  color: var(--ink);
  padding: 0 1rem;
}

.progress-meter i {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background:
    linear-gradient(90deg, var(--teal), var(--gold) 58%, var(--coral));
  transition: width 200ms ease;
}

.progress-meter span {
  position: relative;
  z-index: 1;
  font-size: 1.9rem;
  font-weight: 900;
}

.progress-list {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.progress-list li {
  display: grid;
  grid-template-columns: 0.75rem 1fr;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.progress-list span {
  width: 0.72rem;
  height: 0.72rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
}

.progress-list li[data-complete="true"] {
  color: var(--ink);
  font-weight: 750;
}

.progress-list li[data-complete="true"] span {
  border-color: var(--teal);
  background: var(--teal);
}

.studio-shell {
  padding: 1rem 0 4rem;
}

.studio-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.68fr) minmax(280px, 0.32fr);
  gap: 1.5rem;
  align-items: end;
  border-top: 4px solid var(--ink);
  padding: 2rem 0 1.5rem;
}

.studio-heading p:last-child {
  color: var(--muted);
}

.studio-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.studio-layout > * {
  min-width: 0;
}

.phase-rail {
  position: sticky;
  top: 5.2rem;
  min-width: 0;
}

.phase-rail > div {
  display: grid;
  gap: 0.45rem;
}

.phase-link {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.15rem 0.6rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  padding: 0.65rem;
}

.phase-link span {
  display: grid;
  grid-row: span 2;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 850;
}

.phase-link strong {
  line-height: 1.1;
}

.phase-link small {
  color: var(--muted);
  font-size: 0.78rem;
}

.phase-link[aria-current="step"] {
  border-color: var(--teal);
  background: var(--surface);
  box-shadow: 0 12px 28px rgba(8, 127, 116, 0.12);
}

.phase-link[aria-current="step"] span {
  background: var(--teal);
  color: #ffffff;
}

[data-theme="contrast"] .phase-link[aria-current="step"] span {
  color: #09100f;
}

.activity-flow {
  display: grid;
  gap: 1rem;
}

.studio-section {
  scroll-margin-top: 5.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.studio-section > .section-kicker {
  margin: 0;
  border-bottom: 1px solid var(--line);
  background: var(--surface-2);
  padding: 0.85rem 1rem;
}

.section-body {
  display: grid;
  gap: 1rem;
  padding: 1.1rem;
}

.two-column {
  grid-template-columns: minmax(220px, 0.36fr) minmax(0, 0.64fr);
  align-items: start;
}

.section-body p {
  color: var(--muted);
}

.question-bank,
.mode-picker,
.sample-actions,
.export-actions,
.starter-list {
  flex-wrap: wrap;
  gap: 0.55rem;
}

.choice-pill,
.mode-button,
.label-button,
.starter-button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-3);
  color: var(--ink);
  cursor: pointer;
}

.choice-pill {
  min-height: 2.35rem;
  padding: 0.55rem 0.78rem;
  font-weight: 800;
}

.choice-pill[aria-pressed="true"] {
  border-color: var(--teal);
  background: color-mix(in srgb, var(--teal) 13%, var(--surface));
  color: var(--teal-dark);
}

.field-stack {
  display: grid;
  gap: 0.9rem;
}

.field-block {
  display: grid;
  gap: 0.45rem;
}

.field-block span {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 850;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-3);
  color: var(--ink);
  padding: 0.85rem;
}

textarea {
  min-height: 7.5rem;
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: var(--teal);
  outline: 3px solid color-mix(in srgb, var(--teal) 18%, transparent);
}

.mode-button {
  display: grid;
  min-width: 12rem;
  gap: 0.25rem;
  padding: 0.75rem 0.85rem;
  text-align: left;
}

.mode-button span {
  font-weight: 850;
}

.mode-button small {
  color: var(--muted);
}

.mode-button[aria-selected="true"] {
  border-color: var(--blue);
  background: color-mix(in srgb, var(--blue) 12%, var(--surface));
}

.prompt-preview {
  display: grid;
  gap: 0.8rem;
}

pre {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-3);
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.55;
  padding: 1rem;
  white-space: pre-wrap;
}

.critique-heading,
.compare-intro,
.export-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}

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

.label-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.65rem;
}

.label-button {
  display: grid;
  gap: 0.3rem;
  min-height: 8rem;
  padding: 0.85rem;
  text-align: left;
}

.label-button strong {
  line-height: 1.12;
}

.label-button span {
  color: var(--muted);
  font-size: 0.84rem;
}

.label-button[aria-pressed="true"] {
  border-color: var(--coral);
  background: color-mix(in srgb, var(--coral) 12%, var(--surface));
}

.scoreboard {
  display: grid;
  min-width: 11rem;
  justify-items: end;
  border-left: 4px solid var(--gold);
  padding-left: 1rem;
}

.scoreboard span {
  font-size: 2.2rem;
  font-weight: 950;
  line-height: 1;
}

.scoreboard strong {
  color: var(--muted);
  font-size: 0.9rem;
}

.rubric-grid {
  display: grid;
  gap: 0.65rem;
}

.rubric-row {
  display: grid;
  grid-template-columns: minmax(160px, 0.4fr) minmax(180px, 1fr) 2rem;
  gap: 0.85rem;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-3);
  padding: 0.8rem;
}

.rubric-row p {
  margin-bottom: 0;
  font-size: 0.88rem;
}

input[type="range"] {
  height: 0.45rem;
  accent-color: var(--teal);
  padding: 0;
}

output {
  font-weight: 900;
  text-align: right;
}

.starter-button {
  min-height: 2.4rem;
  padding: 0.55rem 0.72rem;
  color: var(--muted);
  font-weight: 750;
}

.starter-button:hover,
.starter-button:focus-visible,
.choice-pill:hover,
.choice-pill:focus-visible,
.mode-button:hover,
.mode-button:focus-visible,
.label-button:hover,
.label-button:focus-visible {
  border-color: var(--teal);
  outline: none;
}

.export-section {
  border-color: color-mix(in srgb, var(--teal) 50%, var(--line));
}

.export-preview {
  min-height: 18rem;
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.9fr);
  }

  .progress-panel {
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 0.35fr) minmax(220px, 0.25fr) minmax(0, 0.4fr);
    align-items: start;
  }

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

@media (max-width: 880px) {
  h1 {
    font-size: 3.45rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  .hero,
  .studio-heading,
  .studio-layout,
  .two-column,
  .response-grid {
    grid-template-columns: 1fr;
  }

  .phase-rail {
    position: static;
    overflow: hidden;
    width: 100%;
  }

  .phase-rail > div {
    display: flex;
    max-width: 100%;
    overflow-x: auto;
    padding-bottom: 0.35rem;
  }

  .phase-link {
    flex: 0 0 13rem;
  }

  .progress-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-actions {
    width: 100%;
    justify-content: space-between;
  }

  .nav-actions a,
  .nav-button {
    flex: 1;
    justify-content: center;
    padding: 0 0.45rem;
  }

  .hero,
  .studio-shell {
    width: min(100% - 24px, 1180px);
  }

  .hero {
    padding-top: 1.5rem;
  }

  h1 {
    font-size: 2.55rem;
  }

  h2 {
    font-size: 1.9rem;
  }

  .hero-visual {
    min-height: 260px;
  }

  .hero-visual figcaption,
  .critique-heading,
  .compare-intro,
  .export-heading {
    flex-direction: column;
  }

  .label-grid,
  .rubric-row {
    grid-template-columns: 1fr;
  }

  .label-button {
    min-height: 0;
  }

  .scoreboard {
    width: 100%;
    justify-items: start;
    border-left: 0;
    border-top: 4px solid var(--gold);
    padding: 0.75rem 0 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}