/* Zytoderm V2: shared foundation and page styles. */
:root {
  --color-accent: #002778;
  --color-text: #252b35;
  --color-muted: #566171;
  --color-border: #dce1e8;
  --color-background: #fff;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 5rem;
  --site-width: 72rem;
  --reading-width: 70ch;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

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

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.6;
}

:where(a, button, summary, input, select, textarea):focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.site-container {
  width: min(100% - 2 * var(--gutter), var(--site-width));
  margin-inline: auto;
}

.reading-width {
  max-width: var(--reading-width);
}

.site-main {
  flex: 1;
  min-width: 0;
}

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--gutter);
  z-index: 10;
  padding: var(--space-1) var(--space-2);
  background: var(--color-background);
  color: var(--color-accent);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* Shared header and navigation. Links are visible until JS enhances the menu. */
.site-header {
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding-block: var(--space-3);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-accent);
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
  text-decoration: none;
}

.site-brand img {
  display: block;
}

.site-nav ul,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a,
.footer-links a {
  display: inline-block;
  padding-block: var(--space-1);
  color: var(--color-text);
  font-size: 0.9375rem;
  text-decoration: none;
  text-underline-offset: 0.3em;
}

:where(.site-nav, .footer-links) a:hover,
:where(.site-nav, .footer-links) a[aria-current="page"] {
  color: var(--color-accent);
  text-decoration: underline;
}

.account-link {
  padding-left: var(--space-3);
  border-left: 1px solid var(--color-border);
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 44px;
  padding: var(--space-1) 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.2rem;
  background: var(--color-background);
  color: var(--color-accent);
  font: inherit;
  cursor: pointer;
}

/* Homepage: typography and rules provide structure rather than cards. */
.home-content,
.page-content {
  padding-block: var(--space-6);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  overflow-wrap: break-word;
}

:where(.home-content, .page-content) h1,
:where(.home-content, .page-content) h2,
:where(.home-content, .page-content) h3,
:where(.home-content, .page-content) p {
  margin: 0;
}

.home-intro h1 {
  max-width: 20ch;
  margin-block: var(--space-2) var(--space-3);
  font-size: clamp(2.25rem, 1.5rem + 3vw, 3.75rem);
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1.12;
}

.eyebrow {
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.intro-text {
  color: var(--color-muted);
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  line-height: 1.55;
}

.text-link {
  display: inline-block;
  margin-top: var(--space-3);
  color: var(--color-accent);
  font-weight: 600;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.text-link:hover {
  text-decoration-thickness: 2px;
}

.text-link span {
  margin-left: var(--space-1);
}

.home-section {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.home-section h2 {
  margin-bottom: var(--space-2);
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.method-list {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.method-list li + li {
  margin-top: var(--space-3);
}

.method-list h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
}

.method-list p {
  margin-top: var(--space-1);
  color: var(--color-muted);
  font-size: 1rem;
}

/* Scientific figures retain their full image and original caption. */
.image-grid {
  display: grid;
  gap: var(--space-4) var(--space-3);
  margin-top: var(--space-4);
}

.image-grid figure {
  margin: 0;
}

.image-grid img {
  display: block;
  width: 100%;
  height: auto;
}

.image-grid figcaption {
  margin-top: var(--space-1);
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.image-grid strong {
  display: block;
  color: var(--color-text);
}

@media (min-width: 48rem) {
  .image-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.foreword summary {
  padding-block: var(--space-1);
  color: var(--color-accent);
  font-weight: 600;
  cursor: pointer;
}

:where(.prose) p + p,
.foreword[open] p {
  margin-top: var(--space-3);
}

/* Editorial content uses the same readable prose as scientific records. */
.page-heading + .prose {
  margin-top: var(--space-4);
}

.prose h2 {
  margin-block: var(--space-5) var(--space-2);
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
}

.prose h3 {
  margin-block: var(--space-4) var(--space-2);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

.prose :where(ul, ol) {
  margin-block: var(--space-3);
  padding-left: var(--space-3);
}

.prose li + li {
  margin-top: var(--space-2);
}

.prose address {
  margin: 0;
  font-style: normal;
}

.prose address + p {
  margin-top: var(--space-3);
}

.prose > :first-child {
  margin-top: 0;
}

.prose a {
  color: var(--color-accent);
  text-underline-offset: 0.25em;
}

/* Scientific index and reusable search/filter controls. */
.findings-index,
.finding-detail {
  max-width: 56rem;
}

.page-heading h1 {
  margin-block: var(--space-2);
  font-size: clamp(2rem, 1.5rem + 1.5vw, 2.75rem);
  font-weight: 650;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.page-heading > p:not(.eyebrow) {
  color: var(--color-muted);
}

.filter-form {
  display: grid;
  align-items: end;
  gap: var(--space-2);
  margin-block: var(--space-5) var(--space-4);
}

.field {
  min-width: 0;
}

.field label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: 0.875rem;
  font-weight: 600;
}

.field :where(input, select, textarea) {
  width: 100%;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-muted);
  border-radius: 0.2rem;
  background: var(--color-background);
  color: var(--color-text);
  font: 1rem var(--font-sans);
}

.field :where(input, select, textarea):focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.filter-actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-3);
}

.button {
  min-height: 44px;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-accent);
  border-radius: 0.2rem;
  background: var(--color-accent);
  color: var(--color-background);
  font: 600 1rem var(--font-sans);
  cursor: pointer;
}

.reset-link,
.index-pagination a {
  padding-block: var(--space-1);
  color: var(--color-accent);
  font-size: 1rem;
  text-underline-offset: 0.25em;
}

.filter-status {
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 600;
}

.page-content .result-summary {
  margin-bottom: var(--space-2);
  color: var(--color-muted);
  font-size: 0.875rem;
}

.finding-list {
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--color-border);
  list-style: none;
}

.finding-list > li {
  padding-block: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.finding-list h2,
.empty-state h2,
.record-section h2 {
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
}

.finding-list h2 a {
  color: var(--color-accent);
  text-decoration: none;
  text-underline-offset: 0.2em;
}

.finding-list h2 a:hover {
  text-decoration: underline;
}

.finding-taxonomy {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin-block: var(--space-2);
}

.finding-taxonomy dt {
  color: var(--color-muted);
  font-size: 0.8125rem;
}

.finding-taxonomy dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.finding-excerpt {
  max-width: var(--reading-width);
  font-size: 1rem;
}

.page-content .finding-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem var(--space-3);
  margin-top: var(--space-2);
  color: var(--color-muted);
  font-size: 0.875rem;
}

.empty-state {
  padding-block: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.empty-state h2 {
  margin-bottom: var(--space-2);
}

.index-pagination ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
}

@media (min-width: 48rem) {
  .filter-form {
    grid-template-columns: 1.3fr 1fr 1fr;
  }
}

/* Scientific record: prose, unframed figures and secondary metadata. */
.record-back {
  color: var(--color-accent);
  font-size: 0.9375rem;
  text-underline-offset: 0.25em;
}

.record-dates,
.record-metadata {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-block: var(--space-2);
  color: var(--color-muted);
  font-size: 0.9375rem;
}

:where(.record-dates, .record-metadata) dt {
  font-size: 0.8125rem;
}

:where(.record-dates, .record-metadata) dd {
  margin: 0;
}

.record-section {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.record-section h2 {
  margin-block: 0 var(--space-2);
}

.record-figure {
  margin: var(--space-4) 0 0;
}

.record-figure img {
  display: block;
  max-width: 100%;
  height: auto;
}

.record-figure figcaption {
  margin-top: var(--space-1);
  color: var(--color-muted);
  font-size: 0.875rem;
}

.record-notes h2 {
  color: var(--color-muted);
  font-size: 1.125rem;
}

.comments-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.comments-list li + li {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.comments-list .finding-byline {
  margin: 0 0 var(--space-1);
}

.page-content .comment-note {
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: 1rem;
}

/* Publication and account forms share labels, help and Django validation. */
.form-page {
  max-width: 44rem;
}

.account-page {
  max-width: 36rem;
}

.publication-form {
  margin-block: var(--space-4);
  font-size: 1rem;
}

.publication-form .field + .field {
  margin-top: var(--space-3);
}

.form-section {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.form-section + .form-section {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.form-section legend {
  width: 100%;
  margin-bottom: var(--space-3);
  padding: 0;
  font-size: 1.125rem;
  font-weight: 600;
}

.field textarea {
  min-height: 10rem;
  resize: vertical;
}

.field-requirement {
  margin-left: var(--space-1);
  color: var(--color-muted);
  font-size: 0.8125rem;
  font-weight: 400;
}

.field-help {
  display: block;
  margin-top: var(--space-1);
  color: var(--color-muted);
  font-size: 0.875rem;
  line-height: 1.5;
}

.field-help ul {
  margin: 0;
  padding-left: 1.25rem;
}

.field :where(input, select, textarea)[aria-invalid="true"] {
  border-color: #a32323;
}

.field-errors,
.form-errors {
  margin: var(--space-1) 0 0;
  padding-left: 1.25rem;
  color: #a32323;
  font-size: 0.9375rem;
}

.form-errors {
  margin-bottom: var(--space-3);
}

.error-summary {
  margin-top: var(--space-4);
}

.error-summary h2 {
  font-size: 1.125rem;
  font-weight: 600;
}

.error-summary a {
  color: inherit;
}

.error-summary:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

.choice-label,
.field .choice-label {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
  cursor: pointer;
}

.choice-label :where(input[type="checkbox"], input[type="radio"]) {
  flex: none;
  width: 1.125rem;
  min-height: 0;
  height: 1.125rem;
  margin: 0;
  padding: 0;
  accent-color: var(--color-accent);
}

.email-choice + .email-choice {
  margin-top: var(--space-3);
}

.form-actions,
.action-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
}

.form-actions {
  margin-top: var(--space-4);
}

:where(.form-actions, .account-content, .account-navigation) a {
  color: var(--color-accent);
  text-underline-offset: 0.25em;
}

.form-actions a {
  padding-block: var(--space-1);
}

.button-secondary {
  background: var(--color-background);
  color: var(--color-accent);
}

.page-content .form-message {
  margin-top: var(--space-3);
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 1rem;
}

.account-content > p {
  margin-top: var(--space-3);
  font-size: 1rem;
}

.account-navigation {
  margin-top: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  font-size: 0.9375rem;
}

.action-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Shared footer. */
.site-footer {
  padding-block: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
}

.footer-inner p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.footer-inner p a {
  color: inherit;
  text-underline-offset: 0.25em;
}

@media (max-width: 63.999rem) {
  .header-inner {
    padding-block: var(--space-2);
  }

  .site-nav {
    width: 100%;
  }

  .site-nav ul {
    align-items: stretch;
    flex-direction: column;
    gap: 0;
  }

  .site-nav a {
    display: block;
    padding-block: 0.75rem;
  }

  .account-link {
    margin-top: var(--space-1);
    padding-left: 0;
    padding-top: var(--space-1);
    border-left: 0;
    border-top: 1px solid var(--color-border);
  }

  .home-content,
  .page-content {
    padding-block: var(--space-5);
  }

  .home-section {
    margin-top: var(--space-5);
  }
}