/* =========================================================================
   Nathan Muschinske — Portfolio
   Aesthetic: editorial scientific journal. Warm paper, pine-green ink accent,
   Fraunces display serif + Newsreader reading serif + JetBrains Mono labels.
   To recolor the whole site, edit the variables in :root below.
   ========================================================================= */

:root {
  /* Color palette ------------------------------------------------------- */
  --paper:        #f7f4ee;   /* page background */
  --paper-deep:   #efe9dd;   /* alternating section background */
  --ink:          #1b1b18;   /* primary text */
  --ink-soft:     #4a473f;   /* secondary text */
  --muted:        #837e72;   /* captions, meta */
  --line:         #ddd6c7;   /* hairlines / borders */
  --accent:       #1e5240;   /* pine green — primary accent */
  --accent-deep:  #133b2d;   /* darker pine for hovers */
  --accent-2:     #b5602f;   /* clay — sparing secondary accent */
  --paper-card:   #fffdf8;   /* cards */

  /* Typography ---------------------------------------------------------- */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body:    "Newsreader", Georgia, serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  /* Layout -------------------------------------------------------------- */
  --maxw: 1100px;
  --measure: 68ch;            /* reading width for prose */
  --gutter: clamp(1.25rem, 4vw, 4rem);
}

/* Reset ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.075rem;
  line-height: 1.65;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* faint paper grain */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}
img { max-width: 100%; display: block; }
a { color: inherit; }

/* Layout helpers --------------------------------------------------------- */
.wrap { width: min(100% - 2rem, var(--maxw)); margin-inline: auto; }
.section { padding-block: clamp(3.5rem, 9vw, 7rem); }
.section--alt { background: var(--paper-deep); }
.section--alt + .section--alt { border-top: 1px solid var(--line); }

/* Eyebrow / section heading --------------------------------------------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: .8rem;
  margin: 0 0 1.4rem;
}
.eyebrow::before {
  content: attr(data-num);
  color: var(--muted);
  font-weight: 500;
}
.eyebrow span { height: 1px; flex: 1; background: var(--line); }

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
}

/* =========================================================================
   Navigation
   ========================================================================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  width: min(100% - 2rem, var(--maxw));
  margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav__brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.nav__brand b { color: var(--accent); }
.nav__links { display: flex; gap: 1.6rem; list-style: none; margin: 0; padding: 0; }
.nav__links a {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-soft);
  position: relative;
  padding-block: .3rem;
  transition: color .2s ease;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--accent); transition: width .25s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; font-family: var(--font-mono); font-size: .8rem; color: var(--ink); }

@media (max-width: 720px) {
  .nav__links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height .3s ease;
  }
  .nav__links.open { max-height: 380px; }
  .nav__links li { border-top: 1px solid var(--line); }
  .nav__links a { display: block; padding: 1rem; }
  .nav__toggle { display: block; }
}

/* =========================================================================
   Hero
   ========================================================================= */
.hero { position: relative; overflow: hidden; padding-block: clamp(3.5rem, 11vw, 8rem) clamp(2.5rem,7vw,5rem); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: end;
}
.hero__credential {
  font-family: var(--font-mono);
  font-size: .76rem; letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 1.2rem;
}
.hero__name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(3rem, 9vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: -0.025em;
  margin: 0;
}
.hero__name em { font-style: italic; font-variation-settings: "SOFT" 40; color: var(--accent); }
.hero__role {
  font-family: var(--font-mono);
  font-size: clamp(.78rem, 1.6vw, .95rem);
  letter-spacing: .06em;
  color: var(--ink-soft);
  margin: 1.6rem 0 0;
}
.hero__lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

.btn {
  font-family: var(--font-mono);
  font-size: .76rem; letter-spacing: .08em; text-transform: uppercase;
  text-decoration: none;
  padding: .7rem 1.2rem;
  border: 1px solid var(--ink);
  border-radius: 2px;
  transition: all .2s ease;
  display: inline-flex; align-items: center; gap: .5rem;
}
.btn--solid { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.btn--solid:hover { background: var(--accent-deep); border-color: var(--accent-deep); }
.btn--ghost:hover { background: var(--ink); color: var(--paper); }

.hero__rule { margin-top: clamp(2.5rem, 6vw, 4rem); height: 1px; background: var(--line); }

@media (max-width: 820px) {
  .hero__grid { grid-template-columns: 1fr; align-items: start; }
}

/* =========================================================================
   About
   ========================================================================= */
.about__grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: clamp(1.5rem, 5vw, 4rem); }
.about__lead { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.3rem,2.4vw,1.7rem); line-height: 1.35; margin: 0; }
.about__body p { margin: 0 0 1.1rem; color: var(--ink-soft); }
.about__body p:last-child { margin-bottom: 0; }
.facts { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; gap: .9rem; }
.facts li { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding-bottom: .9rem; border-bottom: 1px solid var(--line); }
.facts dt, .facts .k { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding-top: .15rem; }
@media (max-width: 820px) { .about__grid { grid-template-columns: 1fr; } }

/* =========================================================================
   Skills
   ========================================================================= */
.skills__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.skill-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.6rem;
  transition: transform .25s ease, box-shadow .25s ease;
}
.skill-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px -18px rgba(30,82,64,.4); }
.skill-card h3 { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin: 0 0 1rem; }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  font-family: var(--font-body);
  font-size: .92rem;
  padding: .3rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-soft);
}

/* =========================================================================
   Experience (editorial CV list)
   ========================================================================= */
.xp { display: grid; gap: 0; }
.xp__item {
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: clamp(1rem, 3vw, 2.5rem);
  padding-block: 1.8rem;
  border-top: 1px solid var(--line);
}
.xp__item:last-child { border-bottom: 1px solid var(--line); }
.xp__when { font-family: var(--font-mono); font-size: .76rem; letter-spacing: .04em; color: var(--muted); padding-top: .35rem; }
.xp__role { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; line-height: 1.2; margin: 0 0 .25rem; }
.xp__org { color: var(--accent); font-style: italic; margin: 0 0 .9rem; }
.xp__points { margin: 0; padding-left: 1.1rem; color: var(--ink-soft); }
.xp__points li { margin-bottom: .5rem; }
.xp__points li::marker { color: var(--accent-2); }
@media (max-width: 720px) { .xp__item { grid-template-columns: 1fr; gap: .4rem; } .xp__when { padding-top: 0; } }

/* =========================================================================
   Education + Certifications (two columns)
   ========================================================================= */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 5vw, 4rem); }
.edu-item { padding-block: 1.1rem; border-top: 1px solid var(--line); }
.edu-item:first-child { border-top: 0; padding-top: 0; }
.edu-item h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.15rem; margin: 0 0 .2rem; }
.edu-item p { margin: 0; color: var(--ink-soft); }
.edu-item .yr { font-family: var(--font-mono); font-size: .72rem; color: var(--muted); letter-spacing: .05em; }
@media (max-width: 720px) { .split { grid-template-columns: 1fr; } }

/* =========================================================================
   Research & Publications
   ========================================================================= */
.cites { display: grid; gap: 1.4rem; counter-reset: cite; }
.cite {
  display: grid; grid-template-columns: 2.2rem 1fr; gap: 1rem;
  padding-bottom: 1.4rem; border-bottom: 1px solid var(--line);
}
.cite::before {
  counter-increment: cite; content: counter(cite, decimal-leading-zero);
  font-family: var(--font-mono); font-size: .8rem; color: var(--accent); padding-top: .2rem;
}
.cite p { margin: 0; color: var(--ink-soft); }
.cite b { color: var(--ink); }
.cite em { color: var(--ink); }

/* =========================================================================
   Blog / Field Notes
   ========================================================================= */
.notes { display: grid; gap: 0; }
.note-card {
  display: grid; grid-template-columns: 10rem 1fr; gap: clamp(1rem,3vw,2.5rem);
  padding-block: 2rem; border-top: 1px solid var(--line);
  text-decoration: none; color: inherit; transition: background .2s ease;
}
.note-card:last-child { border-bottom: 1px solid var(--line); }
.note-card:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.note-card__meta { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .05em; color: var(--muted); }
.note-card__title { font-family: var(--font-display); font-weight: 500; font-size: 1.5rem; line-height: 1.15; margin: 0 0 .5rem; transition: color .2s ease; }
.note-card:hover .note-card__title { color: var(--accent); }
.note-card__sum { margin: 0; color: var(--ink-soft); max-width: 60ch; }
.note-card__more { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-top: .8rem; display: inline-block; }
@media (max-width: 720px) { .note-card { grid-template-columns: 1fr; gap: .5rem; } }

/* =========================================================================
   Post reader view
   ========================================================================= */
#reader { display: none; }
body.reading #site-main { display: none; }
body.reading #reader { display: block; }

.reader__head { padding-block: clamp(2.5rem,7vw,5rem) 1rem; }
.reader__back {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); text-decoration: none; display: inline-flex; align-items: center; gap: .4rem; margin-bottom: 2rem;
}
.reader__back:hover { color: var(--accent-deep); }
.reader__meta { font-family: var(--font-mono); font-size: .76rem; letter-spacing: .05em; color: var(--muted); margin-bottom: .8rem; }
.reader__title { font-family: var(--font-display); font-weight: 500; font-size: clamp(2rem,5vw,3.2rem); line-height: 1.08; letter-spacing: -0.015em; margin: 0; }

.prose { max-width: var(--measure); margin-inline: auto; padding-bottom: clamp(3rem,8vw,6rem); font-size: 1.15rem; }
.prose > * { margin: 0 0 1.3rem; }
.prose h2 { font-family: var(--font-display); font-weight: 500; font-size: 1.7rem; margin: 2.4rem 0 1rem; line-height: 1.2; }
.prose h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; margin: 2rem 0 .8rem; }
.prose a { color: var(--accent); text-underline-offset: 3px; }
.prose blockquote {
  margin: 1.6rem 0; padding: .6rem 0 .6rem 1.4rem;
  border-left: 3px solid var(--accent-2); color: var(--ink-soft); font-style: italic;
}
.prose code {
  font-family: var(--font-mono); font-size: .88em;
  background: var(--paper-deep); padding: .15em .4em; border-radius: 3px;
}
.prose pre {
  background: var(--ink); color: #f3efe6; padding: 1.2rem 1.4rem; border-radius: 6px;
  overflow-x: auto; font-size: .9rem; line-height: 1.55;
}
.prose pre code { background: none; padding: 0; color: inherit; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { margin-bottom: .5rem; }
.prose li::marker { color: var(--accent-2); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.5rem 0; }
.prose img { border-radius: 6px; margin-block: 1.6rem; }

/* =========================================================================
   Contact / Footer
   ========================================================================= */
.contact { text-align: center; }
.contact .section-title { margin-bottom: .8rem; }
.contact__sub { color: var(--ink-soft); max-width: 50ch; margin: 0 auto 2rem; }
.contact__links { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }

.footer { border-top: 1px solid var(--line); padding-block: 2.5rem; }
.footer__inner { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.footer p { margin: 0; font-family: var(--font-mono); font-size: .72rem; letter-spacing: .05em; color: var(--muted); }
.footer a { color: var(--ink-soft); text-decoration: none; }
.footer a:hover { color: var(--accent); }

/* =========================================================================
   Scroll reveal
   ========================================================================= */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s cubic-bezier(.2,.6,.2,1), transform .7s cubic-bezier(.2,.6,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* Hero load animation */
.hero [data-load] { opacity: 0; transform: translateY(14px); animation: rise .9s cubic-bezier(.2,.6,.2,1) forwards; }
.hero [data-load="1"] { animation-delay: .05s; }
.hero [data-load="2"] { animation-delay: .18s; }
.hero [data-load="3"] { animation-delay: .31s; }
.hero [data-load="4"] { animation-delay: .44s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .hero [data-load] { opacity: 1; transform: none; animation: none; } }