/* ============================================================
   Paperhat Ltd — Stylesheet
   ============================================================
   Imports core, then adds site-specific components.
   ============================================================ */

@import "./core.css";

/* --- Site Token ------------------------------------------- */

:root {
  --stagger-interval: 0.08s;
}

/* --- Public proposition ------------------------------------ */

.status-list {
  max-width: 40rem;
  max-width: var(--measure);
}

.status-list dt {
  margin-top: 2rem;
  margin-top: var(--space-m);
  font-family: "Atkinson Hyperlegible", system-ui, sans-serif;
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 600;
  font-weight: var(--weight-semi);
  letter-spacing: 0.08em;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.status-list dt:first-child {
  margin-top: 0;
}

.status-list dd {
  margin-top: 0.5rem;
  margin-top: var(--space-xs);
}

.trial-steps {
  max-width: 40rem;
  max-width: var(--measure);
  padding-left: 2rem;
  padding-left: var(--space-m);
}

.trial-steps li + li {
  margin-top: 2rem;
  margin-top: var(--space-m);
}

.contact-address {
  margin-top: 2rem;
  margin-top: var(--space-m);
  font-family: "Atkinson Hyperlegible", system-ui, sans-serif;
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-style: normal;
  font-weight: 600;
  font-weight: var(--weight-semi);
}

abbr[title] {
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

/* --- Site Nav Override ------------------------------------- */

.site-nav {
  align-items: baseline;
}

/* Keep skip links compliant with touch target sizing in mobile engines. */
.skip-link {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-s);
}

/* --- Details-Based Navigation ----------------------------- */

.mobile-nav-details {
  display: contents;
}

.mobile-nav-toggle {
  list-style: none;
}

.mobile-nav-toggle::-webkit-details-marker {
  display: none;
}

details.nav-group {
  position: relative;
  display: inline-flex;
  align-items: baseline;
}

details.nav-group > summary {
  list-style: none;
}

details.nav-group > summary::-webkit-details-marker {
  display: none;
}

details.nav-group[open] > .nav-dropdown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

details.nav-group[open] > .nav-trigger {
  color: var(--forest);
}

details.nav-group[open] .nav-trigger-icon {
  transform: rotate(-135deg);
  top: 0.1em;
}

details.nav-group[aria-current="true"] > .nav-trigger {
  color: var(--forest);
  font-weight: 400;
}

@media (max-width: 51.999rem) {
  .mobile-nav-details {
    display: block;
    width: 100%;
  }

  .mobile-nav-details[open] .site-nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .mobile-nav-details:not([open]) .site-nav {
    display: none;
  }

  .site-nav > a,
  .site-nav > details.nav-group {
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--rule-light);
  }

  details.nav-group {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  details.nav-group > summary {
    width: 100%;
  }

  details.nav-group > .nav-dropdown {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0;
    z-index: auto;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    display: none;
  }

  details.nav-group[open] > .nav-dropdown {
    display: block;
  }
}

@media (min-width: 52rem) {
  .mobile-nav-details {
    display: flex;
    align-items: baseline;
  }

  .mobile-nav-toggle {
    display: none;
  }

  .site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--space-m);
  }
}

/* --- Page Content (non-spec subset) ----------------------- */

.page-content h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  font-weight: var(--weight-regular);
  line-height: var(--leading-tight);
  margin-top: var(--space-l);
  margin-bottom: var(--space-s);
}

.page-content li > ul,
.page-content li > ol {
  margin-top: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.page-content strong {
  font-weight: var(--weight-semi);
}

/* --- Ecosystem Links --------------------------------------- */

.ecosystem {
  padding: var(--space-xl) var(--page-gutter);
  border-top: 1px solid var(--rule);
}

.ecosystem-inner {
  max-width: var(--page-max);
  margin: 0 auto;
}

.ecosystem h2 {
  font-size: var(--text-h2);
  margin-bottom: var(--space-m);
}

.ecosystem > .ecosystem-inner > p {
  max-width: var(--measure);
  color: var(--charcoal-light);
  margin-bottom: var(--space-m);
}

.ecosystem-links {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 52rem) {
  .ecosystem-links {
    grid-template-columns: 1fr 1fr;
  }
}

.ecosystem-links li {
  border-top: 1px solid var(--rule-light);
  padding: var(--space-s) 0;
}

.ecosystem-links a {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-small);
  letter-spacing: var(--tracking-wide);
  color: var(--charcoal);
  text-decoration: none;
}

.ecosystem-links a:hover {
  color: var(--forest);
}

.ecosystem-links .link-description {
  display: block;
  font-weight: 400;
  font-size: var(--text-kicker);
  color: var(--charcoal);
  margin-top: 0.25em;
  letter-spacing: var(--tracking-body);
}

/* --- CTA Link ---------------------------------------------- */

.cta-link {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-small);
  letter-spacing: var(--tracking-wide);
  color: var(--forest);
  text-decoration: none;
  border: 1px solid var(--forest);
  padding: var(--space-xs) var(--space-s);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.cta-link:hover {
  background-color: var(--forest);
  color: var(--cream);
}

/* --- Contact Section --------------------------------------- */

.contact {
  margin-top: var(--space-l);
  padding-top: var(--space-l);
  border-top: 1px solid var(--rule-light);
}

.contact h2 {
  margin-top: 0;
}

/* --- Animation Keyframes ----------------------------------- */

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(0.75rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-subtle {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slide-down {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Staggered Page Load ----------------------------------- */

.stagger-in > * {
  animation: fade-in var(--duration-slow) var(--ease-out) both;
}

.stagger-in > *:nth-child(1) {
  animation-delay: calc(var(--stagger-interval) * 1);
}
.stagger-in > *:nth-child(2) {
  animation-delay: calc(var(--stagger-interval) * 2);
}
.stagger-in > *:nth-child(3) {
  animation-delay: calc(var(--stagger-interval) * 3);
}
.stagger-in > *:nth-child(4) {
  animation-delay: calc(var(--stagger-interval) * 4);
}
.stagger-in > *:nth-child(5) {
  animation-delay: calc(var(--stagger-interval) * 5);
}
.stagger-in > *:nth-child(6) {
  animation-delay: calc(var(--stagger-interval) * 6);
}
.stagger-in > *:nth-child(7) {
  animation-delay: calc(var(--stagger-interval) * 7);
}
.stagger-in > *:nth-child(8) {
  animation-delay: calc(var(--stagger-interval) * 8);
}

.fade-in {
  animation: fade-in var(--duration-slow) var(--ease-out) forwards;
}

@media (prefers-reduced-motion: reduce) {
  .stagger-in > * {
    animation: none;
  }
}

/* --- Cards ------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-m);
}

@media (min-width: 52rem) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-l);
  }
}

.card-grid--three {
  grid-template-columns: 1fr;
}

@media (min-width: 40rem) {
  .card-grid--three {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 60rem) {
  .card-grid--three {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.card {
  display: flex;
  flex-direction: column;
  padding: var(--space-m);
  background-color: var(--cream);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--forest);
  transition:
    box-shadow var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-m);
  border-color: var(--rule-light);
  border-top-color: var(--forest);
  transform: translateY(-2px);
}

.card-kicker {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-kicker);
  letter-spacing: var(--tracking-kicker);
  text-transform: uppercase;
  color: var(--charcoal-light);
  margin-bottom: var(--space-xs);
}

.card h2,
.card h3 {
  font-size: var(--text-h2);
  margin-bottom: var(--space-s);
}

.card > p {
  color: var(--charcoal-light);
  margin-bottom: var(--space-m);
  flex-grow: 1;
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link:hover {
  text-decoration: none;
}

.card-link:focus-visible {
  outline: 2px solid var(--forest);
  outline-offset: 3px;
  border-radius: 2px;
}

.card-link:hover .card {
  box-shadow: var(--shadow-m);
  border-color: var(--rule-light);
  border-top-color: var(--forest);
  transform: translateY(-2px);
}

/* --- Section Variants -------------------------------------- */

.section {
  padding: var(--space-xl) var(--page-gutter);
}

.section-inner {
  max-width: var(--page-max);
  margin: 0 auto;
}

.section--alt {
  background-color: var(--cream-deep);
}

.section--bordered {
  border-top: 1px solid var(--rule);
}

.section--forest {
  background-color: var(--forest);
  color: var(--cream);
}

.section--forest a {
  color: var(--cream);
  text-decoration-color: rgba(250, 248, 245, 0.4);
}

.section--forest a:hover {
  text-decoration-color: var(--cream);
}

.section--forest .section-kicker {
  color: var(--cream);
}

.section-kicker {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-kicker);
  letter-spacing: var(--tracking-kicker);
  text-transform: uppercase;
  color: var(--forest);
  margin-bottom: var(--space-m);
}

.section h2 {
  font-size: var(--text-h2);
  margin-bottom: var(--space-m);
}

.section p {
  max-width: var(--measure);
  color: var(--charcoal-light);
  margin-bottom: var(--space-m);
}

.section--forest p {
  color: var(--cream);
}

.section p:last-child {
  margin-bottom: 0;
}

/* --- Feature Grid ------------------------------------------ */

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-m);
  margin-top: var(--space-m);
}

@media (min-width: 40rem) {
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 60rem) {
  .feature-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.feature {
  padding-top: var(--space-s);
  border-top: 1px solid var(--rule-light);
}

.section--forest .feature {
  border-top-color: rgba(250, 248, 245, 0.2);
}

.feature h3 {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-small);
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-xs);
  color: var(--charcoal);
}

.section--forest .feature h3 {
  color: var(--cream);
}

.feature p {
  font-size: var(--text-small);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
}

/* --- Callout / Pull Quote ---------------------------------- */

.callout {
  margin: var(--space-l) 0;
  padding: var(--space-m) var(--space-m);
  border-left: 3px solid var(--forest);
  background-color: var(--cream-deep);
  max-width: var(--measure);
}

.callout p {
  color: var(--charcoal);
  font-style: italic;
  margin-bottom: 0;
}

.callout cite {
  display: block;
  margin-top: var(--space-s);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-small);
  font-style: normal;
  color: var(--charcoal-light);
}

/* --- CTA Button -------------------------------------------- */

.cta-button {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: var(--text-small);
  letter-spacing: var(--tracking-wide);
  color: var(--cream);
  background-color: var(--forest);
  text-decoration: none;
  border: 1px solid var(--forest);
  padding: var(--space-xs) var(--space-m);
  transition:
    background-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.cta-button:hover {
  background-color: var(--forest-light);
  box-shadow: var(--shadow-s);
  color: var(--cream);
}

.cta-button:focus-visible {
  outline: 2px solid var(--forest);
  outline-offset: 3px;
}

/* --- Dark Mode: Section Forest Override -------------------- */

@media (prefers-color-scheme: dark) {
  :root {
    --stagger-interval: 0.08s;
  }

  .section--forest {
    background-color: #14291c;
    color: var(--charcoal);
  }

  .section--forest p {
    color: var(--charcoal-light);
  }

  .section--forest a {
    color: var(--charcoal);
    text-decoration-color: rgba(232, 228, 222, 0.4);
  }

  .section--forest a:hover {
    text-decoration-color: var(--charcoal);
  }

  .section--forest .section-kicker {
    color: var(--forest);
  }

  .section--forest .feature {
    border-top-color: rgba(232, 228, 222, 0.15);
  }

  .section--forest .feature h3 {
    color: var(--charcoal);
  }
}