/* =========================================================
   RUSSELL — personal site
   Design concept: "infrastructure, not decoration."
   Zero external requests: system fonts only, no CDNs, no JS.
   ========================================================= */

:root {
  --bg:        #161B22;
  --bg-alt:    #1E252F;
  --bg-raised: #232B36;
  --text:      #EDEAE3;
  --text-dim:  #9AA5B1;
  --accent:    #E8A33D; /* signal amber — status / attention */
  --accent-2:  #4C9A8E; /* signal teal — links / secondary */
  --line:      rgba(237, 234, 227, 0.12);
  --line-soft: rgba(237, 234, 227, 0.06);

  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;

  --maxw: 880px;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-2);
  text-decoration-color: rgba(76, 154, 142, 0.4);
  text-underline-offset: 3px;
}
a:hover { text-decoration-color: var(--accent-2); }

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

/* ---------- status strip (site signature) ---------- */

.statusbar {
  border-bottom: 1px solid var(--line);
  background: var(--bg-alt);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}
.statusbar__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.statusbar__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(232, 163, 61, 0.15);
  flex: none;
  animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
@media (prefers-reduced-motion: reduce) {
  .statusbar__dot { animation: none; }
}
.statusbar__sep { opacity: 0.4; }
.statusbar__inner strong { color: var(--text); font-weight: 600; }

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

header.site {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px 24px 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}
.wordmark span { color: var(--accent); }

nav.primary {
  display: flex;
  gap: 4px;
  font-family: var(--mono);
  font-size: 13px;
}
nav.primary a {
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 4px;
}
nav.primary a:hover {
  color: var(--text);
  background: var(--bg-alt);
}
nav.primary a[aria-current="page"] {
  color: var(--bg);
  background: var(--accent);
}

/* ---------- layout ---------- */

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 80px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 14px;
}

h1 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
}

h2 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}

.lede {
  font-size: 19px;
  color: var(--text-dim);
  max-width: 60ch;
  margin: 0 0 8px;
}

.byline {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  margin: 18px 0 0;
}

section { margin-top: 56px; }
section:first-of-type { margin-top: 40px; }

hr.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 40px 0;
}

/* ---------- link cards (homepage) ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 40px;
}
.card {
  background: var(--bg);
  padding: 22px 22px 24px;
  text-decoration: none;
  color: var(--text);
  display: block;
}
.card:hover { background: var(--bg-alt); }
.card__tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: block;
  margin-bottom: 8px;
}
.card__title {
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 6px;
}
.card__desc {
  font-size: 14px;
  color: var(--text-dim);
  margin: 0;
}
@media (max-width: 560px) {
  .cards { grid-template-columns: 1fr; }
}

/* ---------- principles list (about) ---------- */

.principles {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.principles li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
}
.principles .k {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-top: 2px;
}
.principles .v { color: var(--text-dim); }
.principles .v strong { color: var(--text); font-weight: 600; }
@media (max-width: 560px) {
  .principles li { grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- resume timeline ---------- */

.timeline {
  border-top: 1px solid var(--line);
}
.entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
}
.entry__date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  padding-top: 3px;
  white-space: nowrap;
}
.entry__role { font-weight: 700; font-size: 16px; margin: 0 0 2px; }
.entry__org { color: var(--accent-2); font-size: 14px; margin: 0 0 10px; }
.entry__desc { color: var(--text-dim); font-size: 15px; margin: 0; }
@media (max-width: 560px) {
  .entry { grid-template-columns: 1fr; gap: 6px; }
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.skill {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--line);
  padding: 5px 10px;
  border-radius: 3px;
}

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--bg);
  background: var(--accent);
  padding: 10px 18px;
  border-radius: 4px;
  text-decoration: none;
  margin-top: 22px;
}
.btn:hover { background: #f0b158; }

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

.contact-block {
  border: 1px solid var(--line);
  background: var(--bg-alt);
  padding: 28px;
  margin-top: 24px;
}
.contact-block .email {
  font-family: var(--mono);
  font-size: 20px;
  color: var(--text);
}
.note {
  font-size: 14px;
  color: var(--text-dim);
  border-left: 2px solid var(--accent-2);
  padding-left: 16px;
  margin-top: 32px;
}

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

.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 32px;
}
.slot {
  aspect-ratio: 4 / 3;
  border: 1px dashed var(--line);
  background:
    repeating-linear-gradient(
      135deg,
      var(--bg-alt),
      var(--bg-alt) 10px,
      var(--bg-raised) 10px,
      var(--bg-raised) 20px
    );
  display: flex;
  align-items: flex-end;
  padding: 10px;
}
.slot span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  background: rgba(22, 27, 34, 0.75);
  padding: 3px 6px;
  border-radius: 3px;
}
@media (max-width: 640px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

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

footer.site {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 24px 40px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}