:root {
  --bg:        #0e0f11;
  --bg-soft:   #16181c;
  --bg-card:   #191c21;
  --line:      #262a30;
  --line-soft: #343a42;
  --text:      #e6e8ec;
  --text-dim:  #9aa1aa;
  --text-mute: #6b7179;
  --accent:    #e11a2b;  /* Ohio State scarlet */
  --accent-2:  #c2c8d0;  /* Ohio State gray */
  --warn:      #f7b955;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

/* Faint telemetry grid backdrop */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.14;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  position: relative;
  z-index: 1;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---------- Top nav ---------- */
header.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(14, 15, 17, 0.74);
  border-bottom: 1px solid var(--line);
}
header.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--accent); }
nav.links { display: flex; gap: 26px; }
nav.links a {
  color: var(--text-dim);
  font-size: 14px;
  font-family: var(--mono);
}
nav.links a:hover { color: var(--accent); text-decoration: none; }
@media (max-width: 620px) { nav.links { display: none; } }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 44px; }
.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-dim);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 5px 13px;
  margin-bottom: 28px;
}
.status .pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(225, 26, 43, 0.6);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(225,26,43,0.5); }
  70%  { box-shadow: 0 0 0 7px rgba(225,26,43,0); }
  100% { box-shadow: 0 0 0 0 rgba(225,26,43,0); }
}
.hero h1 {
  font-size: clamp(32px, 5.2vw, 46px);
  line-height: 1.1;
  margin: 0 0 20px;
  letter-spacing: -0.03em;
  font-weight: 700;
}
.hero h1 .accent { color: var(--accent); }
.hero p.lead {
  font-size: clamp(17px, 2.4vw, 20px);
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 0 34px;
}
.hero .cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  font-family: var(--mono);
  font-size: 14px;
  padding: 11px 20px;
  border-radius: 8px;
  border: 1px solid var(--line-soft);
  color: var(--text);
  transition: border-color .15s, transform .1s, background .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}
.btn.primary:hover { background: #f4283a; }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Section headings ---------- */
section { padding: 48px 0; }
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 34px;
}
.sec-head .idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}
.sec-head h2 {
  font-size: clamp(24px, 4vw, 30px);
  margin: 0;
  letter-spacing: -0.02em;
  font-weight: 650;
}
.sec-head .rule {
  flex: 1;
  height: 1px;
  background: var(--line);
  align-self: center;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}
.about-grid p { color: var(--text-dim); margin: 0 0 16px; }
.about-grid p strong { color: var(--text); font-weight: 600; }
.stack-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-soft);
  padding: 22px;
}
.stack-panel h3 {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  margin: 0 0 16px;
}
.stack-panel h3:not(:first-child) { margin-top: 22px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-dim);
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  padding: 4px 10px;
}
@media (max-width: 720px) { .about-grid { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- Projects ---------- */
.projects { display: grid; gap: 22px; }
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 14px;
  background:
    linear-gradient(180deg, var(--bg-card), var(--bg-soft));
  padding: 28px;
  transition: border-color .18s, transform .18s;
  overflow: hidden;
}
.card:hover { border-color: var(--line-soft); transform: translateY(-2px); }

/* whole-card click target (stretched link) */
.card .stretch {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.card > *:not(.stretch) { position: relative; z-index: 2; pointer-events: none; }
.card a:not(.stretch) { pointer-events: auto; }

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.card-title { display: flex; align-items: center; gap: 12px; }
.card-title .glyph {
  width: 38px; height: 38px;
  flex: none;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-size: 19px;
  background: var(--bg);
  border: 1px solid var(--line-soft);
}
.card-title h3 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.01em;
}
.card-title .kind {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
.badge {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-mute);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}
.card p.desc { color: var(--text-dim); margin: 0 0 18px; font-size: 15px; }

.highlights {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  display: grid;
  gap: 7px;
}
.highlights li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-dim);
}
.highlights li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 12px;
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-mute);
  padding: 2px 0;
}
.tag:not(:last-child)::after { content: " ·"; color: var(--line-soft); }
.card-cta {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  white-space: nowrap;
}
.card:hover .card-cta { text-decoration: underline; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 60px;
  margin-top: 30px;
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
footer .contact a {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--text);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
}
footer .contact a:hover { color: var(--accent); text-decoration: none; }
footer .meta {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-mute);
  text-align: right;
}

/* ============================================================
   DESIGN-BLOG / CASE-STUDY PAGES
   ============================================================ */
.post { padding: 0 0 40px; }
.post-wrap { max-width: 760px; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  margin: 40px 0 0;
}
.back-link:hover { color: var(--accent); text-decoration: none; }

.post-header { padding: 34px 0 30px; border-bottom: 1px solid var(--line); margin-bottom: 40px; }
.post-kicker {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}
.post-header h1 {
  font-size: clamp(30px, 6vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
  font-weight: 700;
}
.post-summary {
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--text-dim);
  margin: 0 0 22px;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-mute);
}
.post-meta .dot-sep { color: var(--line-soft); }
.post-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }

/* Article body typography */
.post-body { font-size: 16.5px; }
.post-body h2 {
  font-size: 25px;
  letter-spacing: -0.02em;
  margin: 52px 0 16px;
  padding-top: 8px;
  font-weight: 650;
}
.post-body h2 .num {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--accent);
  margin-right: 12px;
}
.post-body h3 {
  font-size: 18px;
  margin: 34px 0 12px;
  font-weight: 600;
  color: var(--text);
}
.post-body p { color: var(--text-dim); margin: 0 0 18px; }
.post-body strong { color: var(--text); font-weight: 600; }
.post-body a { color: var(--accent); }
.post-body ul, .post-body ol { color: var(--text-dim); padding-left: 22px; margin: 0 0 20px; }
.post-body li { margin: 0 0 9px; }
.post-body li::marker { color: var(--accent); }

.post-body code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1.5px 6px;
  color: var(--text);
}

/* Blockquote / takeaway */
.post-body blockquote {
  margin: 24px 0;
  padding: 4px 0 4px 20px;
  border-left: 3px solid var(--accent);
  color: var(--text);
  font-size: 18px;
}
.post-body blockquote p { color: var(--text); margin: 0; }

/* Callout / note box */
.note {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 8px;
  padding: 16px 18px;
  margin: 26px 0;
  font-size: 15px;
  color: var(--text-dim);
}
.note .note-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 7px;
}

/* ASCII / architecture figure */
.figure {
  margin: 26px 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  overflow: hidden;
}
.figure pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--text-dim);
}
.figure figcaption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mute);
  padding: 10px 18px;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

/* Images inside figures */
.figure img {
  display: block;
  width: 100%;
  height: auto;
}
.figure.shot { background: var(--bg); }

/* Two-up figure row */
.figure-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 26px 0;
}
.figure-row .figure { margin: 0; }
@media (max-width: 640px) { .figure-row { grid-template-columns: 1fr; } }

/* Project card with a photo */
.card.has-media {
  display: grid;
  grid-template-columns: 1fr minmax(300px, 360px);
  gap: 28px;
  align-items: start;
}
.card-media {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--bg);
}
/* image is already cropped 3:2 — match it so nothing is cropped again */
.card-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: contain;
}
@media (max-width: 760px) {
  .card.has-media { grid-template-columns: 1fr; gap: 20px; }
  .card-media { order: -1; }
}

/* About portrait */
.about-side { display: grid; gap: 18px; align-content: start; }
.portrait {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-soft);
}
.portrait img { display: block; width: 100%; height: auto; }
.portrait figcaption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mute);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}

/* Spec / decision table */
.tbl-scroll { overflow-x: auto; margin: 24px 0; }
table.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 460px;
}
table.spec th, table.spec td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.spec th {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-mute);
}
table.spec td { color: var(--text-dim); }
table.spec td:first-child { color: var(--text); font-family: var(--mono); font-size: 13px; white-space: nowrap; }

/* Key-stats row */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin: 30px 0;
}
.stat {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  padding: 16px 18px;
}
.stat .n {
  font-family: var(--mono);
  font-size: 24px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: -0.02em;
}
.stat .l {
  font-size: 12.5px;
  color: var(--text-mute);
  margin-top: 4px;
}

/* Post footer nav */
.post-foot {
  margin-top: 56px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.post-foot .links { display: flex; gap: 8px; }
.link-btn {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 7px 14px;
  border-radius: 7px;
  border: 1px solid var(--line-soft);
  color: var(--text-dim);
  transition: all .15s;
}
.link-btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.link-btn[aria-disabled="true"] {
  opacity: .45;
  cursor: not-allowed;
  pointer-events: none;
}

/* ============================================================
   FIRMWARE FLASH PAGE
   ============================================================ */
.flash-intro { max-width: 720px; }
.browser-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--warn);
  background: var(--bg-soft);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 22px 0 4px;
  font-size: 13.5px;
  color: var(--text-dim);
}
.browser-note b { color: var(--text); font-weight: 600; }

.flash-layout {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 26px;
  align-items: start;
}
@media (max-width: 780px) { .flash-layout { grid-template-columns: 1fr; } }

/* asset list */
.fw-list { display: flex; flex-direction: column; gap: 10px; }
.fw-list-label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  margin-bottom: 4px;
}
.fw-item {
  text-align: left;
  width: 100%;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg-soft);
  padding: 15px 16px;
  color: var(--text);
  font-family: inherit;
  transition: border-color .15s, background .15s, transform .12s;
}
.fw-item:hover { border-color: var(--line-soft); transform: translateY(-1px); }
.fw-item.active { border-color: var(--accent); background: var(--bg-card); }
.fw-item .fw-item-top {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.fw-item .fw-name { font-size: 15.5px; font-weight: 600; }
.fw-item .fw-chip {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--accent);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
}
.fw-item .fw-sub {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mute);
  margin-top: 5px;
}

/* detail panel */
.fw-detail {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-soft));
  padding: 26px;
  min-height: 320px;
}
.fw-empty {
  display: grid;
  place-items: center;
  height: 280px;
  color: var(--text-mute);
  font-family: var(--mono);
  font-size: 13px;
  text-align: center;
}
.fw-detail h2 {
  margin: 0 0 4px;
  font-size: 24px;
  letter-spacing: -0.02em;
}
.fw-detail .fw-project {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
  margin-bottom: 16px;
}
.fw-detail .fw-desc { color: var(--text-dim); font-size: 15px; margin: 0 0 20px; }

.fw-metaline {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  font-family: var(--mono); font-size: 12.5px; color: var(--text-mute);
  padding-bottom: 18px; margin-bottom: 18px; border-bottom: 1px solid var(--line);
}
.fw-metaline .k { color: var(--text-dim); }
.fw-metaline .k b { color: var(--text); font-weight: 600; }

.hw-head {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  margin: 0 0 12px;
}
.hw-list { list-style: none; padding: 0; margin: 0 0 22px; display: grid; gap: 9px; }
.hw-list li {
  position: relative; padding-left: 22px; font-size: 14.5px; color: var(--text-dim);
}
.hw-list li::before {
  content: "▪"; position: absolute; left: 2px; color: var(--accent);
}

.fw-notes {
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 8px;
  padding: 13px 15px;
  font-size: 13.5px;
  color: var(--text-dim);
  margin: 0 0 24px;
}
.fw-notes .note-label {
  display: block; font-family: var(--mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--accent); margin-bottom: 6px;
}

/* flash action row */
.flash-action {
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px;
  padding-top: 20px; border-top: 1px solid var(--line);
}
.flash-btn {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 9px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: background .15s, transform .1s;
}
.flash-btn:hover { background: #f4283a; transform: translateY(-1px); }
.fw-status {
  font-family: var(--mono); font-size: 12px;
  display: inline-flex; align-items: center; gap: 7px; color: var(--text-mute);
}
.fw-status .led { width: 8px; height: 8px; border-radius: 50%; background: var(--text-mute); }
.fw-status.ok .led { background: #35c26e; box-shadow: 0 0 8px #35c26e88; }
.fw-status.pending .led { background: var(--warn); }
.fw-unsupported, .fw-notallowed {
  font-size: 12.5px; color: var(--warn); font-family: var(--mono);
}

/* reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .status .pulse { animation: none; }
}