/* =========================================================
   Edward Johnson — Portfolio
   Dark engineering theme
   ========================================================= */

:root {
  --bg: #0b0f14;
  --bg-2: #0f151c;
  --panel: #121a23;
  --panel-2: #16212c;
  --line: #1f2c3a;
  --line-2: #2a3b4d;
  --text: #e6edf3;
  --muted: #8b9bab;
  --dim: #5d6d7e;
  --accent: #3ee8b5;        /* PCB green */
  --accent-2: #4cc3ff;      /* signal blue */
  --warn: #ffb547;          /* solder amber */
  --radius: 10px;
  --maxw: 1140px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(rgba(76, 195, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(76, 195, 255, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.6em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }
p  { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

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

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: 0.02em;
}
.logo span { color: var(--accent); }
.logo:hover { text-decoration: none; }

.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  display: block;
  padding: 8px 14px;
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.nav-links a.active { color: var(--accent); background: rgba(62, 232, 181, 0.08); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-2);
  border-radius: 6px;
  color: var(--text);
  width: 40px;
  height: 40px;
  cursor: pointer;
  font-size: 1.2rem;
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    padding: 8px 20px 16px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; font-size: 0.95rem; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--line-2);
  color: var(--text);
  background: var(--panel);
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #04140f; border-color: var(--accent); }
.btn-primary:hover { background: #5ff0c5; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.section-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}
.section-label::before { content: "// "; color: var(--dim); }
.section-head { margin-bottom: 36px; max-width: 680px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}

/* ---------- Hero (home) ---------- */
.hero { padding: 80px 0 64px; }
.hero-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 56px;
  align-items: center;
}
.hero .eyebrow { font-family: var(--mono); color: var(--accent); font-size: 0.9rem; margin-bottom: 14px; }
.hero h1 { margin-bottom: 14px; }
.hero .role { font-size: 1.15rem; color: var(--muted); margin-bottom: 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.hero-links { display: flex; flex-wrap: wrap; gap: 18px; font-family: var(--mono); font-size: 0.85rem; }
.hero-links a { color: var(--muted); }
.hero-links a:hover { color: var(--accent); }

.photo-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: 14px;
  border: 1px solid var(--line-2);
  background: var(--panel);
  overflow: hidden;
}
.photo-frame::after {
  /* corner brackets */
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(62, 232, 181, 0.35);
  border-radius: 8px;
  pointer-events: none;
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Media placeholders ---------- */
.media-ph {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  height: 100%;
  min-height: 180px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-align: center;
  padding: 16px;
  background:
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(255,255,255,0.015) 12px 24px),
    var(--panel-2);
}
.media-ph svg { width: 44px; height: 44px; opacity: 0.6; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 28px; }
.bio p { color: #c9d4de; font-size: 1.05rem; }
.facts { list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: 0.88rem; }
.facts li { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px dashed var(--line); }
.facts li:last-child { border-bottom: 0; }
.facts .k { color: var(--dim); }
.facts .v { color: var(--text); text-align: right; }

/* ---------- Timeline ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.timeline { position: relative; margin: 0; padding: 0 0 0 22px; list-style: none; }
.timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--accent), var(--accent-2));
  opacity: 0.4;
}
.timeline li { position: relative; padding-bottom: 26px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
.timeline .when { font-family: var(--mono); font-size: 0.78rem; color: var(--accent-2); }
.timeline h3 { margin: 2px 0 2px; font-size: 1.05rem; }
.timeline .where { color: var(--muted); font-size: 0.92rem; margin-bottom: 8px; }
.timeline ul { margin: 0; padding-left: 18px; color: #c2cdd8; font-size: 0.95rem; }
.timeline ul li { padding: 0 0 4px; }
.timeline ul li::before { display: none; }

/* ---------- Skills ---------- */
.skill-group + .skill-group { margin-top: 22px; }
.skill-group h3 { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); font-weight: 500; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.chip {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  color: var(--text);
  background: var(--panel-2);
}
.chip.green { border-color: rgba(62,232,181,0.4); color: var(--accent); }
.chip.blue  { border-color: rgba(76,195,255,0.4); color: var(--accent-2); }
.chip.amber { border-color: rgba(255,181,71,0.4); color: var(--warn); }

/* ---------- Category tiles (home) ---------- */
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.tile {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
}
.tile:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-3px); }
.tile .icon { width: 40px; height: 40px; color: var(--accent); margin-bottom: 16px; }
.tile h3 { margin-bottom: 6px; }
.tile p { color: var(--muted); font-size: 0.92rem; margin: 0 0 14px; }
.tile .go { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); }

/* ---------- Page header (category pages) ---------- */
.page-head { padding: 64px 0 24px; border-bottom: 1px solid var(--line); }
.page-head .path { font-family: var(--mono); font-size: 0.82rem; color: var(--dim); margin-bottom: 14px; }
.page-head .path a { color: var(--muted); }
.page-head p { color: var(--muted); max-width: 680px; font-size: 1.05rem; }

/* ---------- Project cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 22px; }
.card {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-3px); }
.card-media { aspect-ratio: 16 / 10; overflow: hidden; border-bottom: 1px solid var(--line); }
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.card-meta { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 0.75rem; color: var(--dim); margin-bottom: 8px; }
.card-body p { color: var(--muted); font-size: 0.93rem; flex: 1; }
.card .chips { margin-bottom: 14px; }
.card .chip { font-size: 0.72rem; padding: 3px 9px; }
.card .more { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); }

.status { font-family: var(--mono); font-size: 0.72rem; padding: 2px 8px; border-radius: 4px; }
.status.done { color: var(--accent); background: rgba(62,232,181,0.1); }
.status.wip  { color: var(--warn); background: rgba(255,181,71,0.1); }

.empty-note {
  margin-top: 28px;
  padding: 16px 20px;
  border: 1px dashed var(--line-2);
  border-radius: var(--radius);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.82rem;
}

/* ---------- Project detail ---------- */
.project-hero { padding: 56px 0 28px; }
.project-hero .path { font-family: var(--mono); font-size: 0.82rem; color: var(--dim); margin-bottom: 16px; }
.project-hero .path a { color: var(--muted); }
.project-hero .lede { color: var(--muted); font-size: 1.1rem; max-width: 760px; }
.spec {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  margin-top: 28px;
}
.spec div { padding: 16px 20px; border-right: 1px solid var(--line); }
.spec div:last-child { border-right: 0; }
.spec .k { display: block; font-family: var(--mono); font-size: 0.72rem; color: var(--dim); text-transform: uppercase; letter-spacing: 0.08em; }
.spec .v { font-size: 0.95rem; }

.feature-media { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 16 / 8; }
.feature-media img, .feature-media video { width: 100%; height: 100%; object-fit: cover; }

.writeup article { min-width: 0; }
.writeup { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; padding: 48px 0 24px; }
.toc { position: sticky; top: 90px; align-self: start; font-family: var(--mono); font-size: 0.82rem; }
.toc a { display: block; padding: 6px 0 6px 12px; color: var(--muted); border-left: 2px solid var(--line); }
.toc a:hover { color: var(--accent); border-left-color: var(--accent); text-decoration: none; }
.writeup article h2 { font-size: 1.45rem; margin-top: 8px; padding-top: 12px; }
.writeup article section { padding: 0 0 36px; }
.writeup article p, .writeup article li { color: #c9d4de; }
.coming-soon {
  padding: 18px 20px;
  border: 1px dashed var(--line-2);
  border-radius: 8px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.85rem;
}

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.gallery figure { margin: 0; border-radius: 8px; overflow: hidden; border: 1px solid var(--line); aspect-ratio: 4 / 3; }
.gallery img { width: 100%; height: 100%; object-fit: cover; }

.pager { display: flex; justify-content: space-between; gap: 16px; padding: 24px 0 64px; border-top: 1px solid var(--line); }

/* ---------- Contact / Footer ---------- */
.contact-panel { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 24px; }
.contact-panel h2 { margin-bottom: 6px; }
.site-footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--dim); font-family: var(--mono); font-size: 0.8rem; }
.site-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .writeup { grid-template-columns: 1fr; gap: 20px; }
  .toc { position: static; display: flex; flex-wrap: wrap; gap: 8px; }
  .toc a { border-left: 0; border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; }
}
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .photo-frame { max-width: 260px; }
  .about-grid, .two-col { grid-template-columns: 1fr; }
  section { padding: 56px 0; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .tiles { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .spec div { border-right: 0; border-bottom: 1px solid var(--line); }
  .spec div:last-child { border-bottom: 0; }
  .panel { padding: 20px; }
}

/* ---------- Project write-up content ---------- */
.feature-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 12px; }
.feature-row > * { aspect-ratio: 3 / 4; width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--line); background: #000; }
@media (max-width: 620px) {
  .feature-row { grid-template-columns: 1fr 1fr; }
  .feature-row > :first-child { grid-column: 1 / -1; aspect-ratio: 4 / 5; }
}

.fig { margin: 22px 0; }
.fig img, .fig video { width: 100%; border-radius: 8px; border: 1px solid var(--line); background: #000; }
.fig video { max-height: 560px; }
.fig img { cursor: zoom-in; }
.fig figcaption { font-family: var(--mono); font-size: 0.78rem; color: var(--dim); margin-top: 8px; line-height: 1.5; }
.fig-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 22px 0; }
.fig-grid.three { grid-template-columns: repeat(3, 1fr); }
.fig-grid .fig { margin: 0; }
.fig-grid .fig img { aspect-ratio: 4 / 3; object-fit: cover; }
.fig-grid .fig video { aspect-ratio: 3 / 4; object-fit: contain; }
.fig-grid.tall .fig img { aspect-ratio: 3 / 4; }
@media (max-width: 620px) {
  .fig-grid, .fig-grid.three { grid-template-columns: 1fr; }
}

.writeup article h3 { font-size: 1.05rem; margin-top: 24px; color: var(--text); }
.writeup article ul { padding-left: 20px; }
.writeup article li { margin-bottom: 4px; }
.writeup article code { font-family: var(--mono); font-size: 0.85em; color: var(--accent); background: var(--panel-2); padding: 1px 6px; border-radius: 4px; }

pre.code {
  background: #070a0e;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: #c9d4de;
  margin: 18px 0;
}
pre.code .c { color: var(--dim); }
pre.code .k { color: var(--accent-2); }
pre.code .s { color: var(--warn); }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 22px 0; font-family: var(--mono); font-size: 0.82rem; }
.flow span { padding: 10px 14px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--panel); }
.flow b { color: var(--accent); font-weight: 400; }

table.data { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 0.92rem; }
table.data th, table.data td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
table.data th { font-family: var(--mono); font-size: 0.75rem; color: var(--dim); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 500; }
table.data td { color: #c9d4de; }
.table-wrap { overflow-x: auto; }

.callout { border-left: 3px solid var(--accent); background: var(--panel); padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 20px 0; color: #c9d4de; }

/* ---------- Lightbox ---------- */
.lightbox { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,0.88); display: none; align-items: center; justify-content: center; padding: 24px; cursor: zoom-out; }
.lightbox.open { display: flex; }
.lightbox img { max-width: 100%; max-height: 100%; border-radius: 8px; }

/* ---------- YouTube click-to-load facade + muted loop clips ---------- */
.yt, .loop {
  position: relative;
  display: block;
  width: 100%;
  max-width: 340px;          /* vertical phone videos stay phone-sized on laptops */
  aspect-ratio: 9 / 16;
  margin: 0 auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #000;
  overflow: hidden;
}
.yt.wide, .loop.wide { aspect-ratio: 16 / 9; max-width: none; }
.fig .loop, .fig-grid .fig video.loop { aspect-ratio: 9 / 16; max-height: none; object-fit: cover; }
.fig .loop.wide, .fig-grid .fig video.loop.wide { aspect-ratio: 16 / 9; }
.yt-play {
  all: unset;
  position: absolute;
  inset: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.yt-play:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }
.fig .yt img,
.yt img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  border: 0;
  border-radius: 0;
  cursor: pointer;
  transition: transform 0.3s ease, filter 0.3s ease;
}
.yt-play::after {          /* play button */
  content: "";
  position: relative;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: rgba(8, 12, 16, 0.72) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M8 5v14l11-7z' fill='%233ee8b5'/%3E%3C/svg%3E") center / 34px no-repeat;
  border: 2px solid rgba(62, 232, 181, 0.7);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.yt-play:hover img { transform: scale(1.03); filter: brightness(0.85); }
.yt-play:hover::after { transform: scale(1.08); background-color: rgba(8, 12, 16, 0.9); }
.yt iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.fig-grid .fig .yt, .fig-grid .fig .loop { max-width: 340px; }