/* ============================================
   TOKENS
   ============================================ */
:root {
  --bg:        #0A1412;
  --surface:   #0F1D19;
  --surface-2: #132622;
  --line:      #1E362F;
  --text:      #E7F0EA;
  --muted:     #7FA396;
  --dim:       #4C6960;
  --accent:    #5EEAA0;   /* phosphor / oscilloscope green */
  --accent-2:  #D8A657;   /* copper trace gold */

  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --max-width: 1080px;
}

/* ============================================
   RESET & BASE
   ============================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

img { max-width: 100%; display: block; }

::selection {
  background: var(--accent);
  color: var(--bg);
}

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

/* subtle graph-paper grid background */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.25;
  mask-image: radial-gradient(ellipse at top, black, transparent 75%);
}

/* ============================================
   TOPBAR
   ============================================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem clamp(1.25rem, 5vw, 4rem);
  background: rgba(10, 20, 18, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

.brand-dot { color: var(--accent); }

.topnav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.topnav a {
  color: var(--muted);
  transition: color 0.15s ease;
}

.topnav a:hover { color: var(--accent); }

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: clamp(4rem, 12vh, 7rem) clamp(1.25rem, 5vw, 4rem) clamp(3rem, 8vh, 5rem);
  max-width: var(--max-width);
  margin: 0 auto;
}

.boot-line {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-title {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  max-width: 46ch;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--muted);
  margin-bottom: 3rem;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.status-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.status-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--dim);
}

.status-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  display: flex;
  align-items: center;
}

.status-active { color: var(--accent); }

.led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 0.5rem;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============================================
   TRACE DIVIDER (signature element)
   ============================================ */
.trace-divider {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 4rem);
}

.trace-divider svg {
  width: 100%;
  height: 40px;
  display: block;
}

.trace-divider path {
  fill: none;
  stroke: var(--line);
  stroke-width: 2;
}

.trace-divider circle {
  fill: var(--surface);
  stroke: var(--accent-2);
  stroke-width: 1.5;
}

.trace-divider-flip svg { transform: scaleX(-1); }

/* ============================================
   SECTIONS
   ============================================ */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(3rem, 8vh, 5rem) clamp(1.25rem, 5vw, 4rem);
}

.section-narrow { max-width: 720px; }

.section-head {
  margin-bottom: 2.5rem;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  margin-bottom: 0.75rem;
}

.section-head h2 {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

/* ============================================
   PROJECT CARDS
   ============================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--accent-2);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.card-top h3 {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.55rem;
  border: 1px solid;
  white-space: nowrap;
}

.pill-active {
  color: var(--accent);
  border-color: var(--accent);
}

.pill-archived {
  color: var(--dim);
  border-color: var(--dim);
}

.card-desc {
  color: var(--muted);
  font-size: 0.92rem;
}

.card-specs {
  display: grid;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.card-specs div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.card-specs dt {
  color: var(--dim);
}

.card-specs dd {
  color: var(--text);
  text-align: right;
}

.card-links {
  padding-top: 0.5rem;
}

.card-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.card-link:hover {
  border-color: var(--accent);
}

.card-image {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  margin-bottom: 0.25rem;
}

/* ============================================
   BUILD LOG
   ============================================ */
.log-list {
  display: flex;
  flex-direction: column;
}

.log-entry {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.log-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-2);
}

.log-text {
  color: var(--muted);
  font-size: 0.92rem;
}

/* ============================================
   ABOUT
   ============================================ */
.about-text {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 62ch;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.contact-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--line);
  transition: border-color 0.15s ease, color 0.15s ease;
}

.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem clamp(1.25rem, 5vw, 4rem) 3rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--dim);
  border-top: 1px solid var(--line);
}

/* ============================================
   MOBILE
   ============================================ */
@media (max-width: 640px) {
  .topbar { padding: 1.25rem 1.25rem; }
  .topnav { gap: 1rem; font-size: 0.72rem; }
  .log-entry { grid-template-columns: 1fr; gap: 0.35rem; }
  .card-specs dd { text-align: left; }
  .card-specs div { flex-direction: column; gap: 0.1rem; }
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor, .led { animation: none; }
  .card { transition: none; }
}