/* ============================================================
   Evan Haines — personal site
   Design tokens
   ============================================================ */
:root {
  --ink: #14212B;
  --ink-soft: #1D2E3A;
  --paper: #E7EAEA;
  --paper-soft: #DEE2E2;
  --surface: #FFFFFF;
  --signal: #3E6E92;
  --signal-bright: #5A8FB5;
  --amber: #C97B3B;
  --muted: #5C6B73;
  --muted-on-ink: #9FB0B8;
  --line: #C7CDCD;
  --line-on-ink: #2C4453;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Work Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --max-width: 1120px;
  --gutter: clamp(1.5rem, 5vw, 4rem);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
}

a {
  color: var(--signal);
  text-decoration: none;
}
a:hover { color: var(--amber); }

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--signal);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  flex-shrink: 0;
}

/* ---------------- Nav ---------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(20, 33, 43, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-on-ink);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-mark {
  font-family: var(--font-mono);
  color: var(--paper);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-mark span { color: var(--amber); }
.nav-links {
  display: flex;
  gap: 1.8rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-links a {
  color: var(--muted-on-ink);
}
.nav-links a:hover { color: var(--paper); }
.nav-toggle { display: none; }

@media (max-width: 640px) {
  .nav-links { display: none; }
}

/* ---------------- Hero ---------------- */
.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}
@media (max-width: 800px) {
  .hero-grid { grid-template-columns: 1fr; }
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  color: var(--paper);
}
.hero .role {
  font-family: var(--font-mono);
  color: var(--signal-bright);
  font-size: 1.05rem;
  margin-top: 0.9rem;
}
.hero p.lede {
  margin-top: 1.4rem;
  color: var(--muted-on-ink);
  font-size: 1.08rem;
  max-width: 46ch;
}
.hero-cta {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.75rem 1.3rem;
  border-radius: 3px;
  border: 1px solid var(--signal-bright);
  color: var(--paper);
  display: inline-block;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:hover {
  background: var(--signal-bright);
  color: var(--ink);
}
.btn.solid {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}
.btn.solid:hover {
  background: var(--paper);
  border-color: var(--paper);
}

.hero-diagram {
  width: 100%;
  height: auto;
}
.hero-diagram-wrapper {
  position: relative;
}
.hero-diagram path.route {
  fill: none;
  stroke: var(--signal-bright);
  stroke-width: 1.5;
  stroke-dasharray: 500;
  stroke-dashoffset: 500;
  animation: draw 2.2s ease forwards 0.3s;
}
.hero-diagram circle.node {
  fill: var(--ink);
  stroke: var(--amber);
  stroke-width: 3.5;
  opacity: 0;
  animation: appear 0.5s ease forwards;
  cursor: pointer;
  transition: fill 0.3s ease;
}
.hero-diagram circle.node.selected {
  fill: var(--paper);
}
.node-label {
  position: absolute;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  transform: translateY(-50%);
  white-space: nowrap;
}
.node-label-right {
  text-align: left;
  padding-left: 4rem;
}
.node-label-left {
  text-align: right;
  padding-right: 4rem;
}
.node-label-0 {
  left: 7.89%;
  top: 84.62%;
  padding-left: 3rem;
}
.node-label-1 {
  right: 60.53%;
  top: 57.69%;
  padding-right: 3.5rem;
}
.node-label-2 {
  left: 71.05%;
  top: 26.92%;
  padding-left: 3rem;
}
.node-label-3 {
  right: 7.89%;
  top: 11.54%;
  padding-right: 2rem;
}
@media (max-width: 600px) {
  .node-label {
    font-size: clamp(0.75rem, 2vw, 0.9rem);
  }
  .node-label-right {
    padding-left: 0.8rem;
  }
  .node-label-left {
    padding-right: 0.8rem;
  }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes appear { to { opacity: 1; } }

/* ---------------- Section scaffolding ---------------- */
section { padding: 5rem 0; }
.section-head {
  margin-bottom: 3rem;
  max-width: 60ch;
}
.section-head h2 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
}
.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}
section.on-ink { background: var(--ink); color: var(--paper); }
section.on-ink .rule { border-top-color: var(--line-on-ink); }
section.on-surface { background: var(--surface); }

/* ---------------- About ---------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
}
@media (max-width: 760px) {
  .about-grid { grid-template-columns: 1fr; }
}
.about-grid p { margin: 0 0 1.1rem; color: var(--ink); }
.about-grid p:last-child { margin-bottom: 0; }

.skill-groups {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.skill-group h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 0.7rem;
}
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink);
  background: var(--surface);
}

/* ---------------- Timeline / node path ---------------- */
.timeline {
  position: relative;
  padding-left: 2.4rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1.5px;
  background: var(--line-on-ink);
}
.timeline-item {
  position: relative;
  padding-bottom: 3rem;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -2.4rem;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--amber);
}
.timeline-item .when {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--signal-bright);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.timeline-item h3 {
  font-size: 1.4rem;
  margin-top: 0.4rem;
  color: var(--paper);
}
.timeline-item .org {
  color: var(--muted-on-ink);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-top: 0.15rem;
}
.timeline-item ul {
  margin: 0.9rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted-on-ink);
}
.timeline-item li { margin-bottom: 0.4rem; }

/* ---------------- Projects / certs ---------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.6rem;
}
.card .tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--amber);
}
.card h3 {
  font-size: 1.2rem;
  margin: 0.6rem 0 0.6rem;
}
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* ---------------- Contact ---------------- */
.contact-row {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}
.contact-row a { color: var(--paper); border-bottom: 1px solid var(--line-on-ink); padding-bottom: 2px; }
.contact-row a:hover { border-color: var(--amber); }

/* ---------------- Footer ---------------- */
footer {
  background: var(--ink);
  color: var(--muted-on-ink);
  padding: 2rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  border-top: 1px solid var(--line-on-ink);
}

/* ---------------- Blog: list ---------------- */
.blog-hero {
  background: var(--ink);
  color: var(--paper);
  padding: 4rem 0 3rem;
}
.post-list {
  display: flex;
  flex-direction: column;
}
.post-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
}
.post-row:first-child { border-top: 1px solid var(--line); }
.post-row .date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 0.2rem;
}
.post-row h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}
.post-row .excerpt { color: var(--muted); margin: 0; }
.post-row .tags {
  margin-top: 0.7rem;
  display: flex;
  gap: 0.5rem;
}
.post-row .tags span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--signal);
  text-transform: uppercase;
}
@media (max-width: 600px) {
  .post-row { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* ---------------- Blog: single post ---------------- */
.post-view { display: none; }
.post-view.active { display: block; }
.post-list-view.hidden { display: none; }

.post-article { max-width: 70ch; }
.post-article .back {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: inline-block;
  margin-bottom: 2rem;
}
.post-article .date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}
.post-article h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin: 0.6rem 0 1.8rem;
}
.post-article .body p,
.post-article .body li { color: var(--ink); font-size: 1.05rem; }
.post-article .body h2 { font-size: 1.4rem; margin: 2rem 0 0.8rem; }
.post-article .body { color: var(--ink); }

.empty-state {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 2rem 0;
}