/* AutismScreen — free milestone moments check
   Mobile-first, no framework, no build step.
   Palette mirrors constants/theme.ts (LightColors / DarkColors). */

:root {
  --primary: #5b9f9f;
  --primary-dark: #3d7a7a;
  --primary-light: #8bc4c4;
  --primary-faded: #e8f4f4;
  /* Solid fills that carry text. Chosen for >=4.5:1 against --on-primary. */
  --primary-solid: #3d7a7a;
  --primary-solid-hover: #2f6161;
  --on-primary: #ffffff;
  --accent: #e8a87c;
  --accent-dark: #d48a5e;
  --accent-light: #f4cdb3;

  --bg: #faf8f5;
  --surface: #ffffff;
  --surface-alt: #f5f2ed;
  --border: #e5e0d8;
  --border-light: #f0ece6;

  --text: #2d3436;
  --text-secondary: #636e72;
  --text-muted: #8a9498;
  --text-inverse: #ffffff;

  --success: #6bbf8a;
  --success-light: #e8f8ef;
  --warning: #f0c27a;
  --warning-light: #fef5e7;
  --info: #7ab8e8;
  --info-light: #e5f1fb;

  --shadow-sm: 0 1px 2px rgba(45, 52, 54, 0.06);
  --shadow-md: 0 4px 16px rgba(45, 52, 54, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  --wrap: 760px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #7bc5c5;
    --primary-dark: #5b9f9f;
    --primary-light: #9bd4d4;
    --primary-faded: #1f3a3a;
    --primary-solid: #7bc5c5;
    --primary-solid-hover: #9bd4d4;
    --on-primary: #121212;
    --accent: #f0b88c;
    --accent-dark: #e8a87c;
    --accent-light: #3d2e22;

    --bg: #121212;
    --surface: #1e1e1e;
    --surface-alt: #2a2a2a;
    --border: #3a3a3a;
    --border-light: #2e2e2e;

    --text: #f0f0f0;
    --text-secondary: #b0b0b0;
    --text-muted: #9a9a9a;
    --text-inverse: #121212;

    --success: #7bd09a;
    --success-light: #1f3a2a;
    --warning: #f5d08a;
    --warning-light: #3d3522;
    --info: #8bccf0;
    --info-light: #1f2e3a;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 18px rgba(0, 0, 0, 0.45);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--primary-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  a {
    color: var(--primary);
  }
}

a:hover {
  color: var(--primary);
}

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 6vw, 3rem);
}

h2 {
  font-size: clamp(1.375rem, 3.5vw, 1.75rem);
}

h3 {
  font-size: 1.0625rem;
}

/* ── Skip link ─────────────────────────────────────────────────────────── */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--primary);
  color: var(--text-inverse);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

/* ── Header ────────────────────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 60px;
}

.brand {
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.header-cta {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary-dark);
  text-decoration: none;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  .header-cta {
    color: var(--primary);
  }
}

.header-cta:hover {
  border-color: var(--primary);
}

/* ── Hero ──────────────────────────────────────────────────────────────── */

.hero {
  padding-block: 3rem 2rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--primary-dark);
  background: var(--primary-faded);
  border-radius: var(--radius-pill);
}

@media (prefers-color-scheme: dark) {
  .eyebrow {
    color: var(--primary);
  }
}

.lede {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 46ch;
}

.disclaimer-inline {
  margin-top: 1.25rem;
  padding: 0.9rem 1rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  background: var(--warning-light);
  border-left: 4px solid var(--warning);
  border-radius: var(--radius-sm);
  max-width: 52ch;
}

.disclaimer-inline strong {
  color: var(--text);
}

.hero-actions,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ── Buttons ───────────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.4rem;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease,
    border-color 0.15s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary-solid);
  color: var(--on-primary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--primary-solid-hover);
  color: var(--on-primary);
}

.btn-primary:disabled {
  background: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-ghost {
  background: transparent;
  color: var(--primary-dark);
  border-color: var(--border);
}

@media (prefers-color-scheme: dark) {
  .btn-ghost {
    color: var(--primary);
  }
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

@media (prefers-color-scheme: dark) {
  .btn-ghost:hover {
    color: var(--primary);
  }
}

/* ── Progress ──────────────────────────────────────────────────────────── */

#check,
#what-this-is,
#result {
  scroll-margin-top: 72px;
}

.progress-shell {
  margin-bottom: 1.75rem;
  position: sticky;
  top: 60px;
  z-index: 10;
  padding: 0.75rem 0;
  background: var(--bg);
}

.progress-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.link-button {
  font: inherit;
  font-size: 0.875rem;
  color: var(--primary-dark);
  background: none;
  border: 0;
  padding: 0.15rem 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  .link-button {
    color: var(--primary);
  }
}

.progress-track {
  height: 8px;
  background: var(--surface-alt);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--primary);
  border-radius: var(--radius-pill);
  transition: width 0.25s ease;
}

/* ── Sections ──────────────────────────────────────────────────────────── */

.section-title {
  margin-bottom: 0.5rem;
}

.section-note {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  max-width: 54ch;
  margin-bottom: 1.5rem;
}

.callout {
  padding: 0.9rem 1rem;
  background: var(--info-light);
  border-left: 4px solid var(--info);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
}

/* ── Questions ─────────────────────────────────────────────────────────── */

.questions {
  display: grid;
  gap: 1rem;
}

.question {
  margin: 0;
  min-width: 0;
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.question[data-answered="true"] {
  border-color: var(--primary-light);
}

.question-legend {
  display: block;
  padding: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.question-number {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.question-help {
  margin: 0.5rem 0 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.options {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.option {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.option:hover {
  border-color: var(--primary-light);
}

.option input {
  flex: 0 0 auto;
  margin: 0.28rem 0 0;
  width: 1.15rem;
  height: 1.15rem;
  accent-color: var(--primary);
  cursor: pointer;
}

.option:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-faded);
}

.option:has(input:focus-visible) {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.option-text {
  display: block;
}

.option-title {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text);
}

.option-desc {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.1rem;
}

.form-actions {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-light);
}

.form-hint {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── Result ────────────────────────────────────────────────────────────── */

.result {
  margin-top: 2.5rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.result:focus {
  outline: none;
}

.result-heading {
  margin-bottom: 0.5rem;
}

.result-summary {
  color: var(--text-secondary);
}

.result-list {
  display: grid;
  gap: 0.6rem;
  margin: 1.25rem 0;
}

.result-item {
  display: grid;
  gap: 0.15rem;
  padding: 0.7rem 0.85rem;
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border);
}

.result-item[data-answer="yes"] {
  border-left-color: var(--success);
}

.result-item[data-answer="sometimes"] {
  border-left-color: var(--warning);
}

.result-item[data-answer="notyet"] {
  border-left-color: var(--info);
}

.result-item-title {
  font-weight: 600;
  font-size: 0.9375rem;
}

.result-item-answer {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.result-guidance {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--info-light);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
}

.result-guidance h3 {
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.result-guidance ul {
  margin: 0;
  padding-left: 1.15rem;
}

.result-guidance li {
  margin-bottom: 0.35rem;
}

.copy-status {
  margin: 0.75rem 0 0;
  min-height: 1.4em;
  font-size: 0.875rem;
  color: var(--success);
}

@media (prefers-color-scheme: dark) {
  .copy-status {
    color: var(--success);
  }
}

/* ── Info grid ─────────────────────────────────────────────────────────── */

.info {
  padding-block: 3rem 1rem;
}

.info-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.info-card {
  padding: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.info-card h3 {
  margin-bottom: 0.4rem;
  color: var(--primary-dark);
}

@media (prefers-color-scheme: dark) {
  .info-card h3 {
    color: var(--primary);
  }
}

.info-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ── Next steps ────────────────────────────────────────────────────────── */

.next-steps {
  padding-block: 2rem;
}

.link-list {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.7rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.link-list a {
  font-weight: 600;
}

/* ── App CTA ───────────────────────────────────────────────────────────── */

.app-cta {
  padding-block: 2rem 3rem;
}

.app-cta-inner {
  display: grid;
  gap: 1.25rem;
  padding: 1.75rem;
  background: var(--primary-faded);
  border: 1px solid var(--primary-light);
  border-radius: var(--radius-lg);
}

.app-cta-inner h2 {
  margin-bottom: 0.5rem;
}

.app-cta-inner p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.app-cta-inner .btn {
  justify-self: start;
}

@media (min-width: 560px) {
  .app-cta-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
  .app-cta-inner .btn {
    justify-self: end;
  }
}

/* ── Footer ────────────────────────────────────────────────────────────── */

.site-footer {
  padding-block: 2rem 3rem;
  border-top: 1px solid var(--border-light);
  background: var(--surface-alt);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.site-footer p {
  max-width: 62ch;
}

.footer-fine {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ── Wider screens ─────────────────────────────────────────────────────── */

@media (min-width: 640px) {
  body {
    font-size: 1.0625rem;
  }

  .hero {
    padding-block: 4rem 2.5rem;
  }

  .question {
    padding: 1.5rem;
  }

  .info-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .result {
    padding: 2rem;
  }
}

@media (min-width: 900px) {
  :root {
    --wrap: 860px;
  }
}

/* ── Print ─────────────────────────────────────────────────────────────── */

@media print {
  :root {
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-alt: #ffffff;
    --text: #000000;
    --text-secondary: #333333;
    --text-muted: #555555;
    --border: #bbbbbb;
    --border-light: #dddddd;
    --primary: #2d3436;
    --primary-dark: #2d3436;
    --primary-light: #999999;
    --primary-faded: #ffffff;
  }

  body {
    font-size: 11pt;
    line-height: 1.45;
    background: #fff;
    color: #000;
  }

  .site-header,
  .hero-actions,
  .hero .btn,
  .progress-shell,
  #checkForm,
  .info,
  .next-steps,
  .app-cta,
  .result-actions,
  .copy-status,
  .skip-link,
  noscript {
    display: none !important;
  }

  main {
    padding: 0;
  }

  .wrap {
    max-width: none;
    padding: 0;
  }

  .hero {
    padding-block: 0 1rem;
  }

  .result {
    display: block !important;
    margin: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
  }

  .result-item {
    border: 1px solid #bbb;
    border-left-width: 3px;
    break-inside: avoid;
  }

  .result-guidance {
    border: 1px solid #bbb;
    background: #fff;
  }

  .site-footer {
    border-top: 1px solid #999;
    background: #fff;
    padding-top: 1rem;
  }

  .site-footer a {
    color: #000;
  }

  a[href]::after {
    content: "";
  }
}