/* ============================================================
   David Myers — davidmyers.work
   Aesthetic: technical-editorial "ledger"
   Warm paper · deep ink · petrol-green accent
   Fraunces (display) · Hanken Grotesk (body) · JetBrains Mono (meta)
   ============================================================ */

:root {
  /* palette */
  --paper:      #f7f4ee;   /* warm off-white background */
  --paper-alt:  #efe9df;   /* alternating section */
  --ink:        #1a1714;   /* near-black, warm */
  --ink-soft:   #4b463f;   /* secondary text */
  --ink-faint:  #8a8276;   /* muted meta */
  --line:       #ddd5c8;   /* hairline rules */
  --line-strong:#c9bfae;
  --accent:     #0b5d52;   /* deep petrol green */
  --accent-deep:#084840;
  --accent-soft:#e3ece9;   /* accent wash */
  --white:      #fffdf9;

  /* type */
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --body:    "Hanken Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  /* metrics */
  --maxw: 1120px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --radius: 4px;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-weight: 400;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* faint grain overlay for paper texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* ---------- layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container.narrow { max-width: 760px; }
.center { text-align: center; }

.section {
  padding-block: clamp(4.5rem, 9vw, 8rem);
  position: relative;
}
.section-alt { background: var(--paper-alt); border-block: 1px solid var(--line); }

/* ---------- section titles ---------- */
.section-title {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  letter-spacing: -0.02em;
  margin: 0 0 2.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line);
}
.section-num {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  transform: translateY(-0.35em);
}
.center-title { justify-content: center; border-bottom: none; padding-bottom: 0; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease, padding .3s ease;
}
.nav.scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
}
.nav-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: padding .3s ease;
}
.nav.scrolled .nav-inner { padding-block: 0.7rem; }
.nav-brand {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.nav-links { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.2rem); }
.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  transition: color .2s ease;
}
.nav-links a:not(.nav-resume)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1.5px;
  background: var(--accent);
  transition: width .25s ease;
}
.nav-links a:not(.nav-resume):hover { color: var(--ink); }
.nav-links a:not(.nav-resume):hover::after { width: 100%; }
.nav-resume {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  padding: 0.4rem 0.9rem;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.nav-resume:hover { background: var(--accent); border-color: var(--accent); color: var(--white); }

/* ---------- hero ---------- */
.hero {
  padding-top: clamp(4rem, 11vw, 8.5rem);
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
  position: relative;
}
/* faint ledger grid lines behind hero */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px);
  background-size: clamp(60px, 9vw, 120px) 100%;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 18%, #000 70%, transparent);
          mask-image: linear-gradient(to bottom, transparent, #000 18%, #000 70%, transparent);
  opacity: 0.45;
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.4rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  opacity: 0;
  animation: fade-up .7s ease .05s forwards;
}
.hero-eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--accent);
}
.hero-title {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin: 0 0 1.6rem;
  max-width: 16ch;
  opacity: 0;
  animation: fade-up .8s ease .15s forwards;
}
.hero-title .accent {
  color: var(--accent);
  font-style: italic;
  font-weight: 500;
}
.hero-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 0 2.4rem;
  opacity: 0;
  animation: fade-up .8s ease .28s forwards;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 3.5rem;
  opacity: 0;
  animation: fade-up .8s ease .4s forwards;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--body);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 0.8rem 1.5rem;
  border-radius: 100px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 1px 0 var(--accent-deep), 0 10px 24px -12px rgba(11,93,82,0.55);
}
.btn-primary:hover { background: var(--accent-deep); transform: translateY(-2px); box-shadow: 0 1px 0 var(--accent-deep), 0 16px 30px -12px rgba(11,93,82,0.6); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ---------- hero stats ---------- */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  opacity: 0;
  animation: fade-up .8s ease .52s forwards;
}
.hero-stats li {
  background: var(--paper);
  padding: 1.3rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.stat-num {
  font-family: var(--display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--ink-faint);
  line-height: 1.35;
}

/* ---------- prose ---------- */
.prose {
  font-size: clamp(1.05rem, 1.5vw, 1.18rem);
  color: var(--ink-soft);
  margin: 0 0 1.4rem;
  max-width: 64ch;
}
.prose:last-child { margin-bottom: 0; }

/* ---------- timeline ---------- */
.timeline {
  position: relative;
  margin-left: 0.5rem;
  padding-left: 2.2rem;
  border-left: 1px solid var(--line-strong);
}
.tl-item {
  position: relative;
  padding-bottom: clamp(2.4rem, 4vw, 3.4rem);
}
.tl-item:last-child { padding-bottom: 0; }
.tl-marker {
  position: absolute;
  left: calc(-2.2rem - 6px);
  top: 0.4rem;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--paper-alt);
  border: 2px solid var(--accent);
  transition: background .3s ease, transform .3s ease, box-shadow .3s ease;
}
.section-alt .tl-marker { background: var(--paper-alt); }
.tl-item.is-visible .tl-marker { background: var(--accent); box-shadow: 0 0 0 5px var(--accent-soft); }
.tl-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.tl-role {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  letter-spacing: -0.015em;
  margin: 0;
}
.tl-dates {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.tl-company {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0.35rem 0 1.1rem;
}
.tl-loc { font-weight: 400; color: var(--ink-faint); }
.tl-points { display: grid; gap: 0.7rem; margin-bottom: 1.2rem; }
.tl-points li {
  position: relative;
  padding-left: 1.3rem;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.55;
}
.tl-points li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  top: 0.15rem;
}
.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tl-tags li {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: var(--ink-faint);
  background: color-mix(in srgb, var(--ink) 4%, transparent);
  border: 1px solid var(--line);
  padding: 0.28rem 0.6rem;
  border-radius: 100px;
  transition: color .2s ease, border-color .2s ease;
}
.tl-item:hover .tl-tags li { border-color: var(--line-strong); }

/* ---------- skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.skill-card {
  background: var(--paper);
  padding: 1.8rem 1.6rem;
  transition: background .25s ease;
}
.skill-card:hover { background: var(--white); }
.skill-card h3 {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1.1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}
.skill-card ul { display: grid; gap: 0.55rem; }
.skill-card li {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

/* ---------- selected work ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.4rem;
}
.proj {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.7rem 1.6rem;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.proj:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--white);
  box-shadow: 0 22px 40px -28px rgba(26,23,20,0.45);
}
.proj-kind {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.proj-kind::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.proj-kind.is-private { color: var(--ink-faint); }
.proj-kind.is-private::before { background: var(--ink-faint); }
.proj-name {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: -0.015em;
  margin: 0 0 0.7rem;
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  color: var(--ink);
  transition: color .2s ease;
}
a.proj-name:hover { color: var(--accent); }
a.proj-name .ext {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  transform: translateY(-1px);
}
.proj-desc {
  color: var(--ink-soft);
  font-size: 0.97rem;
  line-height: 1.55;
  margin: 0 0 1.3rem;
  flex: 1;
}
.proj-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.proj-tags li {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--ink-faint);
  background: color-mix(in srgb, var(--ink) 4%, transparent);
  border: 1px solid var(--line);
  padding: 0.26rem 0.55rem;
  border-radius: 100px;
}

/* ---------- education ---------- */
.edu {
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
}
.edu:last-of-type { border-bottom: none; }
.edu-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.edu-head h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  letter-spacing: -0.015em;
  margin: 0;
}
.edu-dates {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}
.edu-school { font-weight: 600; margin: 0.4rem 0 0.6rem; color: var(--ink); }
.edu-detail { color: var(--ink-soft); margin: 0; font-size: 0.98rem; }

/* ---------- contact ---------- */
.section-contact {
  background: var(--ink);
  color: var(--paper);
  border-top: 1px solid var(--line);
}
.section-contact .section-title { color: var(--paper); }
.section-contact .section-num { color: #6fd8c8; }
.contact-lead { color: #c8c2b8; margin: 1.5rem auto 2.4rem; }
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
}
.section-contact .btn-ghost { color: var(--paper); border-color: rgba(247,244,238,0.28); }
.section-contact .btn-ghost:hover { color: #6fd8c8; border-color: #6fd8c8; }
.section-contact .btn-primary { background: #0e7c6e; box-shadow: none; }
.section-contact .btn-primary:hover { background: #11907f; }

/* ---------- footer ---------- */
.footer {
  background: var(--ink);
  color: var(--ink-faint);
  border-top: 1px solid rgba(247,244,238,0.1);
  padding-block: 1.8rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
}

/* ---------- reveal animation ----------
   Only hide when JS is present (.js on <html>); without JS or before the
   observer fires, content stays fully visible. */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .nav-links { gap: 0.9rem; }
  .nav-links a:not(.nav-resume) { display: none; }
  .tl-head { gap: 0.2rem; }
}

@media (max-width: 420px) {
  .hero-stats { grid-template-columns: 1fr 1fr; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-delay: 0ms !important; transition-duration: .001ms !important; }
  .reveal, .hero-eyebrow, .hero-title, .hero-lead, .hero-actions, .hero-stats { opacity: 1 !important; transform: none !important; }
}