/* =========================================================
   TOKENS
   ========================================================= */
:root {
  --bg: #0c130f;
  --bg-panel: #121b16;
  --bg-panel-raised: #17221c;
  --line: #24322a;
  --line-bright: #35473c;

  --copper: #c2793f;
  --copper-bright: #e0965c;
  --phosphor: #59d6ae;
  --phosphor-dim: #3a8f72;

  --text: #eae3d2;
  --text-muted: #8b9791;
  --text-faint: #5b6960;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 3px;
  --max-width: 920px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--phosphor);
  text-decoration: none;
}
a:hover { color: var(--copper-bright); }

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

.mono { font-family: var(--font-mono); }

/* subtle drill-hole / grid texture across whole page */
.pcb-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(194,121,63,0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.5;
}

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  background: rgba(12, 19, 15, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-mark {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text);
}
.nav-mark:hover { color: var(--text); }
.nav-mark-dot {
  color: var(--phosphor);
  animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }

.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nav-links a:hover { color: var(--phosphor); }
.pin-num {
  color: var(--copper);
  font-size: 0.7rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 32px;
  overflow: hidden;
}

.hero-trace {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.55;
}
.hero-trace polyline {
  fill: none;
  stroke: var(--phosphor-dim);
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  animation: draw-trace 3.2s ease-out forwards 0.3s;
}
@keyframes draw-trace {
  to { stroke-dashoffset: 0; }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--copper-bright);
  letter-spacing: 0.02em;
  margin: 0 0 18px;
}

.hero-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.8rem, 9vw, 6rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  color: var(--text);
}

.hero-sub {
  max-width: 46ch;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin: 0 0 36px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 13px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line-bright);
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn-primary {
  background: var(--copper);
  color: #12100c;
  border-color: var(--copper);
  font-weight: 500;
}
.btn-primary:hover {
  background: var(--copper-bright);
  border-color: var(--copper-bright);
  color: #12100c;
}
.btn-ghost {
  color: var(--text);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--phosphor);
  color: var(--phosphor);
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 48px;
  background: var(--line-bright);
  z-index: 1;
}
.scroll-cue span {
  position: absolute;
  top: 0;
  left: -2.5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--phosphor);
  animation: travel 2s ease-in-out infinite;
}
@keyframes travel {
  0% { top: 0; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { top: 44px; opacity: 0; }
}

/* =========================================================
   SECTIONS — shared
   ========================================================= */
.section {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 120px 32px 40px;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 24px;
}

.section-num {
  font-family: var(--font-mono);
  color: var(--copper);
  font-size: 0.95rem;
  padding-top: 6px;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  margin: 0 0 6px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 600;
  margin: 0;
}

/* =========================================================
   ABOUT — datasheet
   ========================================================= */
.datasheet {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.datasheet-header {
  display: flex;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--bg-panel-raised);
  border-bottom: 1px solid var(--line);
}

.datasheet-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}
.datasheet-status {
  color: var(--phosphor);
}
.datasheet-status::before {
  content: "● ";
}

.spec-list {
  margin: 0;
  padding: 0;
}

.spec-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}
.spec-row:last-child { border-bottom: none; }

.spec-row dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--copper);
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.spec-row dd {
  margin: 0;
  color: var(--text);
}

.spec-row-wide dd {
  color: var(--text-muted);
}

.edit-flag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--bg);
  background: var(--phosphor);
  padding: 1px 6px;
  border-radius: 2px;
  margin-left: 8px;
  vertical-align: middle;
  letter-spacing: 0.04em;
}

/* =========================================================
   PROJECTS — PCB module cards
   ========================================================= */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.module {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.module:hover {
  border-color: var(--copper);
  transform: translateY(-2px);
}

/* screw-hole corners */
.module::before,
.module::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--line-bright);
  background: var(--bg);
}
.module::before { top: 10px; left: 10px; }
.module::after { top: 10px; right: 10px; }

.module-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 12px;
}

.module h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 10px;
  color: var(--text);
}

.module p {
  color: var(--text-muted);
  font-size: 0.94rem;
  margin: 0 0 16px;
}

.module-link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--phosphor);
}

.module-empty {
  color: var(--text-faint);
  font-style: normal;
}

/* =========================================================
   LOG — signal log / git-log style
   ========================================================= */
.log-list {
  display: flex;
  flex-direction: column;
}

.log-entry {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.log-entry:first-child { padding-top: 0; }

.log-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--copper);
  padding-top: 3px;
}

.log-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--text);
}

.log-excerpt {
  color: var(--text-muted);
  font-size: 0.94rem;
  margin: 0;
}

/* =========================================================
   CONTACT — pinout
   ========================================================= */
.pinout {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.pin {
  display: grid;
  grid-template-columns: 90px 130px 1fr;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--line);
}
.pin:last-child { border-bottom: none; }

.pin-id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}

.pin-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--copper-bright);
  letter-spacing: 0.06em;
}

.pin-value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--phosphor);
  justify-self: start;
}

.pin-value-empty {
  color: var(--text-faint);
  font-style: normal;
}

.pin-empty { opacity: 0.55; }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  text-align: center;
  padding: 48px 32px 60px;
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 16px 24px;
    border-bottom: 1px solid var(--line);
  }
  .nav-toggle { display: flex; }

  .spec-row,
  .log-entry {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .pin {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* fade-in-on-scroll utility */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}