:root {
  --ground-2: #f9fafa;
  --panel: #eef0f1;
  --primary: #1a1a1a;
  --body-text: #524d47;
  --muted: #55504a;
  --accent: #5c7a8a;
  --hairline: rgba(26, 26, 26, 0.12);
  --focus-ring: #3f5a68;

  --display: "Inter", "Helvetica Neue", Arial, sans-serif;
  --serif: "Geist Pixel", "Helvetica Neue", Arial, sans-serif;
  --sans: "Geist", "Helvetica Neue", Arial, sans-serif;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 2.75rem;
  --space-5: 4.5rem;

  /* Vertical rhythm on the home screen also yields to viewport height, so
     the no-scroll layout holds on short windows instead of overflowing.
     Horizontal spacing stays on the rem scale above; only vertical block
     spacing uses these. */
  --vh-space-3: clamp(1rem, 2.4vh, 1.75rem);
  --vh-space-4: clamp(1.25rem, 3.6vh, 2.75rem);
  --vh-space-5: clamp(1.5rem, 5.5vh, 4.5rem);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ground-2);
  color: var(--primary);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent);
  color: var(--primary);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--ground-2);
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 5px;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
  border-radius: 2px;
}

button {
  font-family: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

.page {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding-block: var(--vh-space-4);
  padding-inline: var(--space-5);
}

/* Identity */

.identity {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-bottom: var(--vh-space-3);
  border-bottom: 1px solid var(--hairline);
}

.identity-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.identity-primary {
  min-width: 0;
}

.name {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.role {
  margin: 0.3em 0 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--body-text);
}

.contact-row {
  margin: 0.4em 0 0;
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.contact-row a {
  text-decoration-line: underline;
  text-decoration-color: var(--hairline);
  transition: text-decoration-color 0.2s var(--ease-out);
}

.contact-row a:hover,
.contact-row a:focus-visible {
  text-decoration-color: var(--accent);
}

.contact-sep {
  color: var(--hairline);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  white-space: nowrap;
}

.about-link {
  font-family: var(--sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration-line: underline;
  text-decoration-color: transparent;
  transition: color 0.2s var(--ease-out), text-decoration-color 0.2s var(--ease-out);
}

.about-link:hover,
.about-link:focus-visible {
  color: var(--primary);
  text-decoration-color: var(--accent);
}

.thesis {
  margin: 0;
  font-family: var(--serif);
  font-style: normal;
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--body-text);
  max-width: 58ch;
}

.lang-toggle {
  font-family: var(--sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  white-space: nowrap;
}

.lang-toggle span[data-lang-code] {
  transition: color 0.2s var(--ease-out);
}

.lang-toggle span.is-active {
  color: var(--primary);
}

.lang-sep {
  color: var(--hairline);
}

/* Stage: index + preview */

.stage {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--vh-space-5);
  min-height: 0;
}

.index {
  min-width: 0;
}

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

.case-item {
  display: block;
}

.case-sep {
  font-family: var(--display);
  font-size: clamp(1.25rem, min(2.8vw, 5vh), 2.4rem);
  color: var(--accent);
  line-height: 1;
  user-select: none;
}

.case-link {
  display: inline;
  font-family: var(--display);
  font-size: clamp(1.25rem, min(2.8vw, 5vh), 2.4rem);
  line-height: 1.3;
  font-weight: 400;
  letter-spacing: -0.03em;
  color: var(--primary);
  text-decoration-line: underline;
  text-decoration-color: var(--hairline);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
  cursor: pointer;
  border-radius: 3px;
  padding-inline: 0.1em;
  margin-inline: -0.1em;
  transition: color 0.2s var(--ease-out), background-color 0.2s var(--ease-out), text-decoration-color 0.2s var(--ease-out);
}

.case-link:hover,
.case-link:focus-visible,
.case-link.is-active {
  background: var(--primary);
  color: var(--ground-2);
  text-decoration-color: transparent;
}

.case-accordion {
  display: none;
}

/* Status tag */

.status-tag {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.25em 0.75em;
  white-space: nowrap;
}

/* Preview panel: reserves space so nothing else moves, but stays fully
   invisible until a case is hovered or focused. Fixed height regardless of
   which case is shown, so revealing it never shifts anything either. */

.preview {
  position: relative;
  height: clamp(15rem, 38vh, 22rem);
}

.preview-case {
  position: absolute;
  inset: 0;
  background: var(--panel);
  border-radius: 2px;
  padding: var(--vh-space-4);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s var(--ease-out);
}

.preview-case.is-visible {
  opacity: 1;
  visibility: visible;
}

.preview-cover {
  flex-shrink: 0;
  aspect-ratio: 4 / 3;
  max-height: clamp(4rem, 13vh, 7.5rem);
  background: repeating-linear-gradient(
    135deg,
    var(--ground-2) 0,
    var(--ground-2) 8px,
    var(--panel) 8px,
    var(--panel) 16px
  );
  border: 1px solid var(--hairline);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.preview-cover.has-image {
  background-color: transparent;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.preview-cover.has-image .preview-placeholder-label {
  display: none;
}

.preview-meta {
  flex-shrink: 0;
  margin: 0 0 var(--space-1);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--body-text);
}

.preview-result {
  flex-shrink: 0;
  margin: 0 0 var(--space-2);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--primary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.preview-placeholder-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--ground-2);
  padding: 0.3em 0.6em;
  border-radius: 999px;
}

.cta-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  text-decoration-line: underline;
  text-decoration-color: var(--accent);
  transition: gap 0.2s var(--ease-out);
}

.cta-link:hover,
.cta-link:focus-visible {
  gap: 0.65em;
}

.cta-link svg {
  width: 0.85em;
  height: 0.85em;
  flex-shrink: 0;
}

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

  .case-link,
  .lang-toggle span[data-lang-code] {
    transition: none;
  }
}

/* Footer */

.foot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-top: var(--vh-space-3);
  border-top: 1px solid var(--hairline);
  font-size: 0.8125rem;
}

.foot-note {
  margin: 0;
  color: var(--muted);
}

.foot-note a {
  color: var(--muted);
  text-decoration-line: underline;
  text-decoration-color: var(--hairline);
  transition: color 0.2s var(--ease-out), text-decoration-color 0.2s var(--ease-out);
}

.foot-note a:hover,
.foot-note a:focus-visible {
  color: var(--primary);
  text-decoration-color: var(--accent);
}

.foot-soon {
  color: var(--muted);
  opacity: 0.75;
}

.foot-contact {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.foot-contact a {
  color: var(--muted);
  text-decoration-line: underline;
  text-decoration-color: var(--hairline);
  transition: color 0.2s var(--ease-out), text-decoration-color 0.2s var(--ease-out);
}

.foot-contact a:hover,
.foot-contact a:focus-visible {
  color: var(--primary);
  text-decoration-color: var(--accent);
}

.foot-copy {
  margin: 0;
  color: var(--muted);
}

/* Mobile: accordion */

@media (max-width: 760px) {
  .page {
    min-height: 0;
    padding: var(--space-3) var(--space-2);
    grid-template-rows: auto auto auto;
  }

  .identity {
    gap: var(--space-2);
  }

  .identity-top {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .thesis {
    max-width: none;
  }

  .stage {
    display: block;
    padding: var(--space-2) 0 0;
  }

  .preview {
    display: none;
  }

  .case-sep {
    display: none;
  }

  .case-item {
    width: 100%;
    display: block;
    border-bottom: 1px solid var(--hairline);
  }

  .case-link {
    display: block;
    width: 100%;
    padding: var(--space-2) 0;
    margin-inline: 0;
    font-size: clamp(1.75rem, 8vw, 2.25rem);
  }

  .case-accordion.is-open {
    display: block;
    padding: 0 0 var(--space-3);
  }

  .accordion-cover {
    aspect-ratio: 16 / 9;
    background: repeating-linear-gradient(
      135deg,
      var(--ground-2) 0,
      var(--ground-2) 8px,
      var(--panel) 8px,
      var(--panel) 16px
    );
    border: 1px solid var(--hairline);
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: var(--space-2);
  }

  .accordion-cover.has-image {
    background-color: transparent;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
  }

  .accordion-cover.has-image .preview-placeholder-label {
    display: none;
  }

  .accordion-meta {
    margin: 0 0 var(--space-1);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--body-text);
  }

  .accordion-result {
    margin: 0 0 var(--space-2);
    font-family: var(--serif);
    font-size: 1rem;
    line-height: 1.5;
    letter-spacing: -0.02em;
    color: var(--primary);
  }

  .site-nav {
    align-self: flex-start;
  }

  .foot {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .foot-contact {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
}