/* ==========================================================================
   DESIGN TOKENS — Direction B: Systems Architecture / Interface Diagram
   ========================================================================== */
:root {
  --charcoal:    #14181C;
  --charcoal-2:  #1B2027;
  --charcoal-3:  #20262E;
  --bone:        #E8E6DD;
  --bone-70:     rgba(232, 230, 221, 0.68);
  --bone-45:     rgba(232, 230, 221, 0.42);
  --pine:        #4A6B5C;
  --pine-bright: #6B9683;
  --pine-dim:    rgba(74, 107, 92, 0.4);
  --brass:       #D4A24C;
  --brass-dim:   rgba(212, 162, 76, 0.16);
  --warn:        #B0563F;
  --line:        rgba(232, 230, 221, 0.12);
  --line-strong: rgba(232, 230, 221, 0.22);

  --display: "Space Grotesk", sans-serif;
  --body:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, Menlo, monospace;

  --max: 1180px;
  --spine-w: 56px;
  --radius: 3px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--charcoal);
  color: var(--bone);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--brass); color: var(--charcoal); }

/* faint schematic grid on the page background */
.gridfield {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  mask-image: linear-gradient(to bottom, black, black, transparent);
}

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal.pre-animate {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.pre-animate.in-view { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 56px);
  background: rgba(20, 24, 28, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.mark {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.mark .dot { color: var(--brass); }
.mark .id {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--bone-45);
  letter-spacing: 0.06em;
}

.nav { display: flex; align-items: center; gap: 26px; }
.nav a {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--bone-45);
  position: relative;
  padding: 4px 0 8px;
  transition: color 0.2s ease;
}
.nav a::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--brass);
  transform: translateX(-50%) scale(0);
  transition: transform 0.2s ease;
}
.nav a:hover { color: var(--bone); }
.nav a.active { color: var(--brass); }
.nav a.active::before { transform: translateX(-50%) scale(1); }

/* ==========================================================================
   Spine + Track grid  (the signature block-diagram backbone)
   ========================================================================== */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--spine-w) 1fr;
}

.spine {
  position: relative;
}
.spine::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--pine-dim) 4%, var(--pine-dim) 96%, transparent);
}

.track {
  min-width: 0;
  padding: 0 clamp(18px, 4vw, 48px) 0 0;
}

/* a "block" is one section on the diagram, wired to the spine */
.block {
  position: relative;
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.block:last-of-type { border-bottom: none; }

.block::before {
  /* connector line running from the spine into the block */
  content: "";
  position: absolute;
  left: calc(-1 * var(--spine-w) + (var(--spine-w) / 2));
  top: 74px;
  width: calc(var(--spine-w) / 2);
  height: 1px;
  background: var(--pine-bright);
  opacity: 0.6;
}
.block::after {
  /* port node where the connector meets the block */
  content: "";
  position: absolute;
  left: calc(-1 * var(--spine-w) + (var(--spine-w) / 2) - 4px);
  top: 70px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--charcoal);
  border: 1.5px solid var(--brass);
}

.port-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 18px;
}
.port-label .idx { color: var(--bone-45); }

.block h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -0.01em;
  margin: 0 0 28px;
  max-width: 20ch;
}

/* asymmetric offsets — alternate blocks sit at different widths/indents */
.block--wide  { max-width: 100%; }
.block--right { margin-left: clamp(0px, 8vw, 120px); max-width: 640px; }
.block--tight { max-width: 560px; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding: clamp(56px, 12vh, 120px) 0 48px;
  border-bottom: 1px solid var(--line);
}
.hero::before, .hero::after { content: none; }

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--pine-bright);
  border: 1px solid var(--pine-dim);
  background: rgba(74, 107, 92, 0.08);
  padding: 6px 12px;
  border-radius: 20px;
  margin: 0 0 28px;
}
.status-chip .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--pine-bright);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  max-width: 16ch;
}
.hero-title .accent { color: var(--brass); }

.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.14rem);
  color: var(--bone-70);
  max-width: 54ch;
  margin: 0 0 36px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 44px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--brass); color: var(--charcoal); border-color: var(--brass); font-weight: 600; }
.btn-primary:hover { background: #E3B25E; }
.btn-ghost { background: transparent; color: var(--bone); }
.btn-ghost:hover { border-color: var(--pine-bright); color: var(--pine-bright); }

/* legend row — a mini diagram key, doubles as quick links */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.legend-item {
  flex: 1 1 160px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px 16px 0;
  border-right: 1px solid var(--line);
}
.legend-item:last-child { border-right: none; }
.legend-item .k {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bone-45);
}
.legend-item .v { font-size: 0.94rem; color: var(--bone); }
.legend-item a.v:hover { color: var(--brass); }

/* ==========================================================================
   About
   ========================================================================== */
.about-body { font-size: 1.02rem; color: var(--bone-70); max-width: 62ch; }
.about-body p + p { margin-top: 16px; }

.port-grid {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.port-grid li {
  list-style: none;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--bone-70);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 7px 12px;
  position: relative;
  padding-left: 20px;
}
.port-grid li::before {
  content: "";
  position: absolute;
  left: 9px; top: 50%;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--pine-bright);
  transform: translateY(-50%);
}

/* Education — sits under About.Out, same subsystem-label pattern as Off the Clock */
.edu-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.edu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.edu-item:hover { border-color: var(--pine-bright); transform: translateY(-2px); }
.edu-degree { font-size: 0.94rem; color: var(--bone); }
.edu-meta {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: var(--brass);
  flex-shrink: 0;
}

/* ==========================================================================
   Mission — requirements framing (REQ-01, REQ-02...) + inline code-comment quote
   ========================================================================== */
.mission-statement {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.6;
  color: var(--bone);
  max-width: 60ch;
  margin: 0 0 40px;
}

.req-list { list-style: none; padding: 0; margin: 0; max-width: 640px; }
.req-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
  color: var(--bone-70);
}
.req-list li:last-child { border-bottom: 1px solid var(--line); }
.req-list .req-id {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--brass);
  padding-top: 2px;
}

.mission-quote {
  margin-top: 44px;
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--pine-bright);
  max-width: 62ch;
  line-height: 1.7;
}
.mission-quote .cmt { color: var(--bone-45); }

/* ==========================================================================
   Off the clock — staggered subsystem rail
   ========================================================================== */
.hobbies-intro { font-size: 1.02rem; color: var(--bone-70); max-width: 60ch; margin: 0 0 40px; }

.subsystem-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bone-45);
  margin: 0 0 16px;
}
.subsystem-label:not(:first-of-type) { margin-top: 40px; }

.rail {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding: 8px 4px 20px;
  scroll-snap-type: x proximity;
}
.rail::-webkit-scrollbar { height: 6px; }
.rail::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 4px; }

.subcard {
  scroll-snap-align: start;
  flex: 0 0 auto;
  width: min(300px, 78vw);
  background: var(--charcoal-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.subcard:hover { transform: translateY(-4px); border-color: var(--pine-dim); }
/* stagger: alternating cards sit slightly lower, echoing a signal trace */
.rail .subcard:nth-child(even) { margin-top: 22px; }

.subcard-photo { aspect-ratio: 4 / 3; overflow: hidden; }
.subcard-photo img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 0.4s ease;
}
.subcard:hover .subcard-photo img { transform: scale(1.05); }

.subcard-body { padding: 18px 20px 20px; }
.subcard-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px;
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.04em;
  color: var(--bone-45); text-transform: uppercase;
}
.subcard-top .stat { color: var(--pine-bright); }
.subcard h3 {
  font-family: var(--display); font-weight: 600; font-size: 1.12rem; margin: 0 0 8px;
}
.subcard p { font-size: 0.88rem; color: var(--bone-70); margin: 0; }

.subcard--placeholder { display: flex; align-items: center; justify-content: center; min-height: 160px; }
.subcard--placeholder .subcard-body { text-align: center; color: var(--bone-45); font-family: var(--mono); font-size: 0.78rem; }

/* ==========================================================================
   Field notes — Systems & Stories log
   ========================================================================== */
.log-intro { font-size: 1.02rem; color: var(--bone-70); max-width: 60ch; margin: 0 0 36px; }

.log-entry {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 28px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.log-entry:last-of-type { border-bottom: 1px solid var(--line); }

.log-num {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--brass);
  padding-top: 4px;
}
.log-num span { display: block; color: var(--bone-45); font-size: 0.7rem; margin-top: 4px; }

.log-entry h3 {
  font-family: var(--display); font-weight: 600; font-size: 1.24rem; margin: 0 0 10px;
}
.log-entry p { font-size: 0.94rem; color: var(--bone-70); max-width: 60ch; margin: 0 0 14px; }
.log-link {
  font-family: var(--mono); font-size: 0.78rem; color: var(--pine-bright);
  border-bottom: 1px solid var(--pine-dim); padding-bottom: 2px;
}
.log-link:hover { color: var(--brass); border-color: var(--brass); }

.log-cta {
  margin-top: 8px;
  padding: 22px 24px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.log-cta p { margin: 0; font-size: 0.92rem; color: var(--bone-70); }
.log-cta .k { font-family: var(--mono); font-size: 0.72rem; color: var(--bone-45); letter-spacing: 0.05em; text-transform: uppercase; display: block; margin-bottom: 4px; }

/* ==========================================================================
   Contact
   ========================================================================== */
.contact-sub { color: var(--bone-70); max-width: 50ch; margin: 0 0 32px; font-size: 1.02rem; }

.output-ports { display: flex; flex-wrap: wrap; gap: 14px; }
.output-port {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  min-width: 220px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.output-port:hover { border-color: var(--brass); transform: translateY(-2px); }
.output-port .k { font-family: var(--mono); font-size: 0.68rem; color: var(--bone-45); letter-spacing: 0.05em; text-transform: uppercase; display: block; margin-bottom: 3px; }
.output-port .v { font-size: 0.96rem; color: var(--bone); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 26px clamp(18px, 5vw, 56px) 56px;
  padding-left: calc(var(--spine-w) + clamp(18px, 5vw, 56px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--bone-45);
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
  gap: 10px;
}
.site-footer a:hover { color: var(--brass); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 760px) {
  :root { --spine-w: 32px; }
  .block--right { margin-left: 0; max-width: 100%; }
  .nav { gap: 16px; }
  .legend-item { flex: 1 1 45%; }
  .log-entry, .req-list li { grid-template-columns: 44px 1fr; gap: 14px; }
  .edu-item { flex-wrap: wrap; }
}

@media (max-width: 520px) {
  .nav a span.full { display: none; }
  .status-bar-hint { display: none; }
}