/* Hallmark · genre: editorial · macrostructure: Letter · theme: teal-slate · nav: N9 · footer: Ft6
 * Hallmark · pre-emit critique: P5 H4 E5 S5 R5 V4
 */

/* ─── Reset ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  overflow-x: clip;
  scroll-behavior: smooth;
}

body {
  overflow-x: clip;
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Focus ─── */
:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ─── Links ─── */
a {
  color: var(--color-accent-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover {
  color: var(--color-accent);
}

/* ─── Layout containers ─── */
.nav-wrap,
.letter,
.footer {
  width: 100%;
  max-width: 68rem;
  margin-inline: auto;
  padding-inline: var(--space-2xl);
}

.letter {
  max-width: 46rem;
  padding-block: var(--space-4xl);
}

/* ─── Nav N9: edge-aligned minimal ─── */
.nav {
  border-bottom: var(--rule-hairline);
}

.nav-wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-block: var(--space-lg);
}

.nav__wordmark {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-ink);
  text-decoration: none;
}

.nav__links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
}

.nav__links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
}
.nav__links a:hover {
  color: var(--color-ink);
}

/* ─── Letter header / hero ─── */
.letter__header {
  padding-block-end: var(--space-3xl);
}

.letter__salutation {
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-muted);
  margin-block-end: var(--space-lg);
}

.letter__name {
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 400;
  font-style: normal;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-block-end: var(--space-xl);
  overflow-wrap: anywhere;
  min-width: 0;
}

.letter__subtitle {
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--color-muted);
  line-height: 1.5;
  max-width: 38ch;
}

/* ─── Rules + ornaments ─── */
.rule {
  border: none;
  border-top: var(--rule-hairline);
  margin-block: var(--space-3xl);
}

.ornament {
  text-align: center;
  color: var(--color-rule);
  font-family: var(--font-body);
  letter-spacing: 0.5em;
  font-size: var(--text-sm);
  margin-block: var(--space-3xl);
  user-select: none;
}

/* ─── Section layout ─── */
.letter__section {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.section__label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-neutral);
  padding-block-end: var(--space-md);
  border-bottom: var(--rule-hairline);
}

/* ─── Prose ─── */
.prose {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.prose p {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
  max-width: 62ch;
}

.prose em {
  font-style: italic;
}

/* ─── Experience roles ─── */
.role {
  padding-block: var(--space-md);
  border-bottom: var(--rule-hairline);
}
.role:last-child {
  border-bottom: none;
}

.role__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-block-end: var(--space-sm);
}

.role__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

.role__meta {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.role__description {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink);
  max-width: 58ch;
}

/* ─── Digital health projects ─── */
.project {
  padding-block: var(--space-md);
  border-bottom: var(--rule-hairline);
}
.project:last-child {
  border-bottom: none;
}

.project__title {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-base);
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--color-accent-text);
  margin-block-end: var(--space-sm);
}
.project__title:hover {
  color: var(--color-accent);
}
.project__title:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.project__description {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink);
  max-width: 58ch;
}

/* ─── Education + credentials ─── */
.credential {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-block: var(--space-md);
  border-bottom: var(--rule-hairline);
}
.credential:last-child {
  border-bottom: none;
}

.credential__degree {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

.credential__school {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

/* ─── Publications ─── */
.pub-group {
  padding-block: var(--space-md);
  border-bottom: var(--rule-hairline);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.pub-group:last-child {
  border-bottom: none;
}

.pub-group__discipline {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neutral);
}

.pub__entry {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink);
  font-style: italic;
  max-width: 58ch;
}

/* ─── Contact sign-off ─── */
.letter__close {
  gap: var(--space-lg);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact__link {
  font-family: var(--font-display);
  font-size: var(--text-base);
  letter-spacing: 0.01em;
}

.letter__signoff {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-muted);
  margin-block-start: var(--space-xl);
}

/* ─── Footer Ft6: letter close ─── */
.footer {
  border-top: var(--rule-hairline);
}

.footer-wrap {
  padding-block: var(--space-xl);
  text-align: center;
}

.footer__line {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-neutral);
}

/* ─── Entrance animation (motion-on only) ─── */
@media (prefers-reduced-motion: no-preference) {
  .letter__header {
    animation: fade-in var(--dur-fast) var(--ease-out) both;
  }
}

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

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

/* ─── Responsive: 768px ─── */
@media (max-width: 768px) {
  .letter {
    padding-block: var(--space-3xl);
  }
}

/* ─── Responsive: 414px ─── */
@media (max-width: 414px) {
  .nav-wrap {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }

  .nav__links {
    gap: var(--space-lg);
  }

  .letter {
    padding-block: var(--space-2xl);
    padding-inline: var(--space-lg);
  }

  .nav-wrap,
  .footer-wrap {
    padding-inline: var(--space-lg);
  }
}

/* ─── Responsive: 375px ─── */
@media (max-width: 375px) {
  .nav-wrap,
  .footer-wrap {
    padding-inline: var(--space-lg);
  }

  .letter {
    padding-inline: var(--space-lg);
  }
}

/* ─── Responsive: 320px ─── */
@media (max-width: 320px) {
  .nav-wrap,
  .footer-wrap,
  .letter {
    padding-inline: var(--space-md);
  }
}