/* Seth Chester — style.css
   Warm minimal. Near-monochrome, one desaturated green accent.
   System font stack so text paints with zero network requests. */

:root {
  --paper:  #FBF9F5;
  --ink:    #1E221F;
  --muted:  #6E736D;
  --rule:   #E4DFD5;
  --accent: #4F6B57;

  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
          Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono",
          "Roboto Mono", Menlo, Consolas, monospace;

  --measure: 34rem;   /* reading width */
  --page:    68rem;   /* outer container */
  --step:    clamp(4rem, 9vw, 7.5rem);  /* vertical rhythm between sections */
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:  #131614;
    --ink:    #EDEAE3;
    --muted:  #979D95;
    --rule:   #292E2A;
    --accent: #8FB196;
  }
}

/* Native cross-document page transitions. No JavaScript.
   Browsers without support navigate instantly as normal. */
@view-transition { navigation: auto; }

@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) { animation: none !important; }
  * { scroll-behavior: auto !important; }
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(1.0625rem, 0.35vw + 1rem, 1.1875rem);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

figure { margin: 0; }   /* browsers default figures to 40px side margins */

[id] { scroll-margin-top: 5rem; }

a { color: inherit; }

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

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

.wrap {
  width: 100%;
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}

.skip {
  position: absolute; left: -9999px;
  background: var(--ink); color: var(--paper);
  padding: 0.6rem 1rem; z-index: 10;
}
.skip:focus { left: 1rem; top: 1rem; }

/* ---------- nav ---------- */

.nav {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--rule);
}

.nav-inner {
  display: flex; align-items: baseline;
  justify-content: space-between; gap: 1.5rem;
  padding-block: 1.15rem;
}

.wordmark {
  font-weight: 600;
  letter-spacing: -0.012em;
  text-decoration: none;
  font-size: 1rem;
  white-space: nowrap;
}

.nav-links {
  display: flex; gap: clamp(0.9rem, 3vw, 2rem);
  font-family: var(--mono);
  font-size: clamp(0.75rem, 0.3vw + 0.7rem, 0.8125rem);
  letter-spacing: 0.01em;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  padding-block: 0.15rem;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.nav-links a:hover { color: var(--ink); border-bottom-color: var(--rule); }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- intro ---------- */

.intro {
  padding-block: clamp(3rem, 8vw, 6rem) var(--step);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 22rem;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

.intro-copy { order: -1; }   /* copy left, portrait right on wide screens */

.portrait {
  width: 100%;
  border-radius: 3px;
  aspect-ratio: 440 / 581;
  object-fit: cover;
}

.intro p {
  margin: 0;
  font-size: clamp(1.3125rem, 1.1vw + 0.95rem, 1.75rem);
  line-height: 1.46;
  letter-spacing: -0.018em;
  text-wrap: pretty;
}

.intro p + p { margin-top: 1.4em; }

.intro .after {
  font-size: clamp(1rem, 0.3vw + 0.95rem, 1.0625rem);
  line-height: 1.7;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.01em;
}

@media (max-width: 54rem) {
  .intro {
    grid-template-columns: 1fr;
    justify-items: start;
    gap: 2.25rem;
  }
  .intro-copy { order: 0; }         /* portrait first on narrow screens */
  .portrait { width: min(62vw, 17rem); }
}

/* ---------- full-bleed figure ---------- */

.bleed { margin-block: 0; }

.bleed img {
  width: 100%;
  height: clamp(20rem, 56vh, 34rem);
  object-fit: cover;
}

.bleed figcaption {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  padding-block: 0.85rem;
  letter-spacing: 0.01em;
}

/* ---------- section headers ---------- */

.section { padding-block: var(--step); }

.section-head {
  display: flex; align-items: center; gap: 1rem;
  padding-bottom: 2.5rem;
}

.section-head h2 {
  margin: 0;
  font-size: 0.8125rem;
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.section-head .line {
  flex: 1; height: 1px; background: var(--rule);
}

.section-head .disc {
  width: 3.25rem; height: 3.25rem;
  border-radius: 50%;
  object-fit: cover;
  flex: none;
  box-shadow: 0 0 0 1px var(--rule);
}

/* ---------- work list ---------- */

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

.work li { border-top: 1px solid var(--rule); }
.work li:last-child { border-bottom: 1px solid var(--rule); }

.work a {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 0 1.25rem;
  padding-block: clamp(1.75rem, 4vw, 2.5rem);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.work a:hover { opacity: 0.62; }

.work .num {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--accent);
  padding-top: 0.3rem;
}

.work h3 {
  margin: 0;
  font-size: clamp(1.1875rem, 1.4vw + 0.9rem, 1.5rem);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -0.014em;
  text-wrap: balance;
}

.work .meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.7rem;
  letter-spacing: 0.01em;
}

.work .tag {
  color: var(--accent);
  margin-left: 0.75rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--rule);
  white-space: nowrap;
}

.work .sum {
  margin: 0.9rem 0 0;
  color: var(--muted);
  max-width: 52ch;
  text-wrap: pretty;
}

@media (max-width: 34rem) {
  .work a { grid-template-columns: 1fr; gap: 0.5rem; }
  .work .num { padding-top: 0; }
}

/* ---------- contact ---------- */

.contact { padding-block: var(--step); }

.contact p {
  margin: 0 0 1.75rem;
  font-size: clamp(1.25rem, 2.2vw, 1.625rem);
  line-height: 1.45;
  letter-spacing: -0.014em;
  max-width: 30ch;
}

.links {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.75rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
}

.links a {
  text-decoration: none;
  color: var(--accent);
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  padding-bottom: 1px;
  transition: border-color 0.18s ease;
}
.links a:hover { border-bottom-color: currentColor; }

/* ---------- footer ---------- */

.foot {
  position: relative;
  margin-top: var(--step);
  background: #0F1210;   /* keeps the bar legible before the image paints */
}

.foot img {
  width: 100%;
  height: clamp(11rem, 26vh, 17rem);
  object-fit: cover;
}

.foot .bar {
  position: absolute; inset-inline: 0; bottom: 0;
  padding-block: 1.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.72);
  display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 0.5rem 1.5rem;
}

/* ---------- interior pages ---------- */

.page-head { padding-block: clamp(3rem, 8vw, 5.5rem) 0; }

.page-head h1 {
  margin: 0;
  font-size: clamp(1.75rem, 3vw + 1rem, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.page-head .kicker {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 1rem;
}

.prose { max-width: var(--measure); padding-block: 2.5rem 0; }
.prose p { margin: 0 0 1.35em; text-wrap: pretty; }
.prose p:last-child { margin-bottom: 0; }

.inset { padding-block: clamp(2.5rem, 6vw, 4rem); }
.inset img { width: 100%; border-radius: 3px; }
.inset figcaption,
.bleed figcaption.cap {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  padding-top: 0.85rem;
  letter-spacing: 0.01em;
}

/* research entries */

.entry { padding-block: clamp(3rem, 7vw, 5rem); border-top: 1px solid var(--rule); }
.entry:first-of-type { border-top: 0; }

.entry-head { display: grid; grid-template-columns: 2.5rem 1fr; gap: 0 1.25rem; }
.entry-head .num { font-family: var(--mono); font-size: 0.8125rem; color: var(--accent); padding-top: 0.35rem; }

.entry h2 {
  margin: 0;
  font-size: clamp(1.3125rem, 1.6vw + 0.9rem, 1.75rem);
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.018em;
  text-wrap: balance;
}

.entry .meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  margin: 0.75rem 0 0;
  letter-spacing: 0.01em;
  line-height: 1.75;
}

.entry .body { max-width: var(--measure); padding-top: 2rem; }
.entry .body p { margin: 0 0 1.35em; text-wrap: pretty; }
.entry .body p:last-child { margin-bottom: 0; }
.entry .body .note { color: var(--muted); font-size: 0.9375rem; }

.entry figure { padding-top: 2.25rem; }
.entry figure img { width: 100%; border-radius: 3px; }
.entry figure figcaption {
  font-family: var(--mono); font-size: 0.75rem;
  color: var(--muted); padding-top: 0.75rem;
}

@media (min-width: 60rem) {
  .entry .body { padding-left: 3.75rem; }
  .entry figure { padding-left: 3.75rem; }
}

@media (max-width: 34rem) {
  .entry-head { grid-template-columns: 1fr; gap: 0.4rem; }
  .entry-head .num { padding-top: 0; }
}

/* credentials */

.creds { padding-block: var(--step) 0; }

.creds dl {
  margin: 0;
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0.9rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.75;
}

.creds dt { color: var(--muted); }
.creds dd { margin: 0; }

.creds .headline {
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.8;
  margin: 0 0 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--rule);
}

@media (max-width: 40rem) {
  .creds dl { grid-template-columns: 1fr; gap: 0.15rem 0; }
  .creds dd { margin-bottom: 1rem; }
}

/* contact */

.big-links { display: grid; gap: 0; padding-block: 2.5rem 0; max-width: 40rem; }

.big-links a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--rule);
  text-decoration: none;
  font-size: 1.125rem;
  transition: opacity 0.18s ease;
}
.big-links a:last-child { border-bottom: 1px solid var(--rule); }
.big-links a:hover { opacity: 0.6; }
.big-links .what { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }

/* ---------- coursework gallery ---------- */

.gallery { padding-block: var(--step) 0; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: clamp(1rem, 2.5vw, 1.75rem);
  padding-top: 2.5rem;
}

.gallery figure img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 3px;
}

.gallery figcaption {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
  padding-top: 0.75rem;
  line-height: 1.6;
}

/* ==========================================================
   Home page — tan / green / black theme
   Scoped to body.home so interior pages keep the warm-paper
   palette. Locked to one look in light and dark mode.
   ========================================================== */

body.home {
  --paper:  #E9DFC9;   /* tan */
  --ink:    #14170F;   /* near-black */
  --muted:  #6A6450;
  --rule:   #CFC2A4;
  --accent: #3F5D3F;   /* green */

  --night:      #101208;   /* black panel */
  --night-text: #ECE3CE;
  --night-mute: #9DAF90;
}

/* ---------- hero ---------- */

.hero {
  min-height: calc(100svh - 4.15rem);
  display: grid;
  align-content: center;
  position: relative;
  padding-block: clamp(2.5rem, 7vw, 5rem) clamp(4rem, 9vw, 6rem);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 27rem;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.25rem, 4.6vw + 1rem, 4.25rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.033em;
  text-wrap: balance;
  color: var(--ink);
}

.hero h1::after {
  content: "";
  display: block;
  width: 4.5rem;
  height: 4px;
  margin-top: clamp(1.25rem, 2.5vw, 2rem);
  background: var(--accent);
  border-radius: 2px;
}

.hero-after {
  margin: 1.5rem 0 0;
  font-family: var(--mono);
  font-size: clamp(0.8125rem, 0.3vw + 0.75rem, 0.9375rem);
  letter-spacing: 0.01em;
  color: var(--muted);
}

.hero .portrait {
  width: 100%;
  border-radius: 4px;
  aspect-ratio: 440 / 581;
  object-fit: cover;
  box-shadow: 0 1px 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1rem, 3vw, 2rem);
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.scroll-cue::after {
  content: "";
  display: block;
  width: 1px;
  height: 1.75rem;
  margin: 0.6rem auto 0;
  background: linear-gradient(to bottom, var(--rule), transparent);
}

@media (max-width: 54rem) {
  .hero { min-height: 0; padding-block: clamp(2rem, 6vw, 3rem) clamp(3rem, 8vw, 4rem); }
  .hero-inner { grid-template-columns: 1fr; justify-items: start; gap: 2.25rem; }
  .hero-copy { order: 1; }
  .hero .portrait { width: min(72vw, 20rem); }
  .scroll-cue { display: none; }
}

/* ---------- black statement panel ---------- */

.statement {
  background: var(--night);
  color: var(--night-text);
  min-height: 92svh;
  display: grid;
  align-content: center;
  padding-block: clamp(6.5rem, 16vw, 11rem) clamp(9rem, 22vw, 16rem);
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}

.statement-title {
  margin: 0 0 clamp(2rem, 4vw, 3rem);
  font-size: clamp(1.75rem, 2.4vw + 1rem, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.028em;
  color: var(--night-text);
}

.statement-title::after {
  content: "";
  display: block;
  width: 3.5rem;
  height: 4px;
  margin: clamp(1rem, 2vw, 1.5rem) auto 0;
  background: var(--night-mute);
  border-radius: 2px;
}

.statement-inner {
  max-width: 46rem;
  margin-inline: auto;
  text-align: center;
  opacity: 0;                    /* JS drives this on scroll */
  transform: translateY(28px);
  will-change: opacity, transform;
}

.statement-text {
  margin: 0;
  font-size: clamp(1.25rem, 1.5vw + 0.95rem, 1.875rem);
  line-height: 1.5;
  letter-spacing: -0.016em;
  text-wrap: pretty;
}

@media (prefers-reduced-motion: reduce) {
  .statement-inner { opacity: 1; transform: none; }
}

/* ---------- home sections on tan ---------- */

body.home .work li { border-color: var(--rule); }
body.home .work li:last-child { border-bottom-color: var(--rule); }
body.home .section-head .line { background: var(--rule); }

body.home .contact p {
  font-weight: 600;
  letter-spacing: -0.018em;
}

/* ---------- three link cards (home) ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  padding: var(--step) 2px 0;
}

.card {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--night, #101208);
  color: #ECE3CE;
  text-decoration: none;
  isolation: isolate;
}

.card img {
  width: 100%;
  height: clamp(24rem, 74vh, 42rem);
  object-fit: cover;
  transition: transform 0.65s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
              rgba(10, 12, 6, 0.90) 0%,
              rgba(10, 12, 6, 0.55) 30%,
              rgba(10, 12, 6, 0.10) 62%,
              rgba(10, 12, 6, 0) 100%);
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.card-cap {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 1;
  padding: clamp(1.5rem, 2.6vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.card-name {
  font-size: clamp(1.5rem, 1.6vw + 1rem, 2.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.026em;
}

.card-go {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--night-mute, #9DAF90);
  margin-top: 0.35rem;
  transition: transform 0.3s ease;
}

/* the Professional card carries no photo — just the black field */
.card-blank {
  min-height: clamp(24rem, 74vh, 42rem);
  background: var(--night, #101208);
}
.card-blank::after { display: none; }

.card:hover img,
.card:focus-visible img { transform: scale(1.05); }
.card:hover::after,
.card:focus-visible::after { opacity: 0.85; }
.card:hover .card-go,
.card:focus-visible .card-go { transform: translateX(4px); }

.card:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }

@media (prefers-reduced-motion: reduce) {
  .card img, .card-go { transition: none; }
  .card:hover img, .card:focus-visible img { transform: none; }
  .card:hover .card-go { transform: none; }
}

@media (max-width: 60rem) {
  .cards { grid-template-columns: 1fr; }
  .card img { height: clamp(20rem, 52vh, 28rem); }
  .card-blank { min-height: clamp(20rem, 52vh, 28rem); }
}

/* nav has six items now — let it wrap rather than overflow */
.nav-links { flex-wrap: wrap; row-gap: 0.35rem; justify-content: flex-end; }

@media (max-width: 40rem) {
  .nav-inner { flex-wrap: wrap; gap: 0.6rem 1rem; }
  .nav-links { justify-content: flex-start; gap: 0.85rem; }
}