/* ============================================================
   pkia — personal site
   Deep-navy maritime theme, radar-cyan accent
   ============================================================ */

:root {
  --bg: #070d18;
  --bg-raise: #0b1424;
  --bg-panel: #0e1930;
  --line: rgba(148, 178, 215, .14);
  --line-strong: rgba(148, 178, 215, .28);
  --text: #e8eef7;
  --text-dim: #9fb0c5;
  --text-faint: #6b7d94;
  --accent: #4cc9f0;
  --accent-deep: #1899c9;
  --accent-soft: rgba(76, 201, 240, .12);
  --gold: #ffd166;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 14px;
  --shadow: 0 20px 50px rgba(2, 6, 14, .5);
  --maxw: 1100px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(1100px 500px at 85% -5%, rgba(76, 201, 240, .08), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(24, 153, 201, .06), transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #04121b;
  padding: .6rem 1rem; border-radius: 0 0 8px 0; z-index: 100;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

::selection { background: rgba(76, 201, 240, .35); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

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

strong { color: #fff; font-weight: 600; }

/* ============ Navigation ============ */

.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: rgba(7, 13, 24, .78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.nav.scrolled { border-bottom-color: var(--line); }

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex; align-items: center; gap: .6rem;
  font-family: var(--font-head); font-weight: 600; font-size: 1.05rem;
  color: var(--text); letter-spacing: .01em;
}
.brand:hover { text-decoration: none; }
.brand-mark { width: 26px; height: 26px; color: var(--accent); }

.nav-links { display: flex; align-items: center; gap: 1.9rem; }
.nav-links > a {
  color: var(--text-dim); font-size: .93rem; font-weight: 500;
  transition: color .2s;
}
.nav-links > a:hover { color: var(--text); text-decoration: none; }

.nav-cta {
  color: var(--accent) !important;
  border: 1px solid var(--line-strong);
  padding: .45rem 1rem; border-radius: 999px;
  transition: background .2s, border-color .2s;
}
.nav-cta:hover { background: var(--accent-soft); border-color: var(--accent) !important; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; padding: 8px; cursor: pointer;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--text);
  border-radius: 2px; transition: transform .25s, opacity .25s;
}

/* ============ Hero ============ */

.hero {
  position: relative;
  padding: 152px 0 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(900px 480px at 30% 20%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 480px at 30% 20%, #000 0%, transparent 75%);
  opacity: .5;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.25fr .85fr;
  gap: 3rem; align-items: center;
  padding-bottom: 4.5rem;
}

.hero-role {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--font-mono); font-size: .82rem;
  color: var(--accent); letter-spacing: .06em; text-transform: uppercase;
  margin: 0 0 1.4rem;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(76, 201, 240, .5);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(76, 201, 240, .45); }
  70% { box-shadow: 0 0 0 11px rgba(76, 201, 240, 0); }
  100% { box-shadow: 0 0 0 0 rgba(76, 201, 240, 0); }
}

.hero-name {
  margin: 0 0 1.6rem;
  font-family: var(--font-head);
  font-size: clamp(3.2rem, 8.5vw, 5.6rem);
  line-height: .98; font-weight: 700; letter-spacing: -.02em;
  text-transform: uppercase;
}
.hero-name .line { display: block; }
.hero-name .accent { color: var(--accent); }

.hero-tagline {
  margin: 0 0 2.2rem; max-width: 34rem;
  color: var(--text-dim); font-size: 1.1rem;
}
.hero-tagline strong { color: var(--text); }

.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-bottom: 1.6rem; }

.hero-note {
  margin: 0; color: var(--text-faint);
  font-family: var(--font-mono); font-size: .85rem;
}

/* Radar */

.hero-radar { display: grid; place-items: center; }
.hero-radar svg {
  width: min(100%, 400px);
  filter: drop-shadow(0 0 40px rgba(76, 201, 240, .12));
}
.radar-ring {
  fill: none; stroke: var(--line-strong); stroke-width: 1;
}
.radar-cross { stroke: var(--line); stroke-width: 1; }
.radar-center { fill: var(--accent); }
.radar-sweep-wrap {
  transform-origin: 210px 210px;
  animation: sweep 6s linear infinite;
}
.radar-sweep-line { stroke: var(--accent); stroke-width: 1.6; opacity: .9; }
@keyframes sweep { to { transform: rotate(360deg); } }

.blip { fill: var(--gold); }
.blip.b1 { animation: blip 6s infinite; }
.blip.b2 { animation: blip 6s 1.4s infinite; }
.blip.b3 { animation: blip 6s 3s infinite; }
.blip.b4 { animation: blip 6s 4.4s infinite; }
@keyframes blip {
  0%, 18% { opacity: 0; }
  22% { opacity: 1; }
  55% { opacity: .85; }
  75%, 100% { opacity: 0; }
}

/* Stats bar */

.stats-bar {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 20, 36, .55);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1rem; padding-top: 2rem; padding-bottom: 2rem;
}
.stat { text-align: center; }
.stat + .stat { border-left: 1px solid var(--line); }
.stat-num {
  display: block;
  font-family: var(--font-head); font-weight: 700;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem); color: #fff;
}
.stat-label {
  display: block; margin-top: .25rem;
  font-size: .82rem; color: var(--text-faint);
}

/* ============ Sections ============ */

.section { padding: 96px 0; }
.section-alt { background: rgba(11, 20, 36, .45); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-label {
  font-family: var(--font-mono); font-size: .8rem;
  color: var(--text-faint); letter-spacing: .12em; text-transform: uppercase;
  margin: 0 0 .8rem;
}
.section-index { color: var(--accent); }

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700; letter-spacing: -.015em; line-height: 1.15;
  margin: 0 0 3rem;
}

.greeting { color: var(--accent); }

/* About */

.about-grid {
  display: grid; grid-template-columns: 1.4fr .9fr;
  gap: 3.5rem; align-items: start;
}
.about-copy p { color: var(--text-dim); }
.about-copy p + p { margin-top: 1.1rem; }

.about-side { display: grid; gap: 1.4rem; }

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.6rem;
}
.panel-title {
  margin: 0 0 1rem;
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--text-faint);
}

.chips {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: .5rem;
}
.chips li {
  font-family: var(--font-mono); font-size: .78rem;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid rgba(76, 201, 240, .25);
  padding: .28rem .65rem; border-radius: 999px;
}
.chips-sm li {
  font-size: .72rem; padding: .2rem .55rem;
  background: rgba(148, 178, 215, .08);
  border-color: var(--line-strong); color: var(--text-dim);
}

/* Terminal panel ("Currently") */

.terminal {
  padding: 0;
  overflow: hidden;
  background: #081120;
  font-family: var(--font-mono);
}
.terminal-bar {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: .62rem .95rem;
  background: rgba(148, 178, 215, .06);
  border-bottom: 1px solid var(--line);
}
.terminal-dots { display: inline-flex; gap: .42rem; }
.terminal-dots i { width: 10px; height: 10px; border-radius: 50%; opacity: .85; }
.terminal-dots i:nth-child(1) { background: #ff5f56; }
.terminal-dots i:nth-child(2) { background: #ffbd2e; }
.terminal-dots i:nth-child(3) { background: #27c93f; }
.terminal-title {
  font-size: .72rem; color: var(--text-faint);
  letter-spacing: .06em; white-space: nowrap;
}

.terminal-body {
  position: relative;
  padding: 1.05rem 1.15rem 1.15rem;
  font-size: .78rem; line-height: 1.6;
}
.terminal-body::before {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, .02) 0 1px, transparent 1px 3px);
  pointer-events: none;
}

.term-line { margin: 0; white-space: nowrap; overflow: hidden; }
.term-prompt { color: var(--accent); }
.term-prompt::after { content: " "; }
.term-type { color: var(--text); }

.term-out {
  list-style: none; margin: .75rem 0; padding: 0;
  display: grid; gap: .6rem;
}
.term-out li { position: relative; padding-left: 1.3em; }
.term-dot {
  position: absolute; left: 0; top: .38em;
  width: .6em; height: .6em; border-radius: 50%;
  background: #2dd4a7;
  box-shadow: 0 0 6px rgba(45, 212, 167, .7);
}
.term-unit { color: var(--text); font-weight: 500; }
.term-state { margin-left: .55em; }
.term-state.running { color: #2dd4a7; }
.term-state.waiting { color: var(--gold); }
.term-state.permanent { color: var(--accent); }
.term-desc { display: block; color: var(--text-faint); }

.term-cursor {
  display: inline-block;
  width: .55em; height: 1.05em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: termblink 1.1s steps(1) infinite;
}
@keyframes termblink { 50% { opacity: 0; } }

/* staged playback — armed by JS only, so no-JS visitors see the full output */
.terminal.anim .term-type {
  display: inline-block;
  overflow: hidden; vertical-align: bottom;
  width: 0;
}
.terminal.anim .term-out li,
.terminal.anim .term-last { opacity: 0; }
.terminal.play .term-type {
  animation: termtype 1.05s steps(26, end) .35s forwards;
}
.terminal.play .term-out li:nth-child(1) { animation: termfade .45s ease 1.5s forwards; }
.terminal.play .term-out li:nth-child(2) { animation: termfade .45s ease 1.85s forwards; }
.terminal.play .term-out li:nth-child(3) { animation: termfade .45s ease 2.2s forwards; }
.terminal.play .term-out li:nth-child(4) { animation: termfade .45s ease 2.55s forwards; }
.terminal.play .term-last { animation: termfade .45s ease 2.9s forwards; }
@keyframes termtype { to { width: calc(var(--term-ch, 26) * 1ch); } }
@keyframes termfade { to { opacity: 1; } }

/* Projects */

.project-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.project-card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem 1.8rem 1.5rem;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(76, 201, 240, .45);
  box-shadow: var(--shadow);
}
.project-card.featured {
  grid-row: span 1;
  border-color: rgba(76, 201, 240, .35);
  background:
    radial-gradient(600px 200px at 20% 0%, rgba(76, 201, 240, .1), transparent 70%),
    var(--bg-panel);
}

.project-top {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1.1rem;
}
.project-badge {
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .05em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(76, 201, 240, .3);
  padding: .25rem .6rem; border-radius: 999px;
}
.project-badge.subtle { color: var(--text-dim); background: rgba(148,178,215,.08); border-color: var(--line-strong); }
.project-badge.win { color: var(--gold); background: rgba(255,209,102,.1); border-color: rgba(255,209,102,.35); }
.project-year { font-family: var(--font-mono); font-size: .78rem; color: var(--text-faint); }

.project-card h3 {
  margin: 0 0 .7rem;
  font-family: var(--font-head); font-size: 1.3rem; font-weight: 600;
}
.project-card > p { margin: 0 0 1.2rem; color: var(--text-dim); font-size: .96rem; flex-grow: 1; }

.project-link {
  display: inline-flex; align-items: center; gap: .45rem;
  font-weight: 600; font-size: .92rem; margin-top: .4rem;
}
.project-link svg { transition: transform .2s; }
.project-link:hover svg { transform: translateX(3px); }

.more-link { margin: 2.4rem 0 0; color: var(--text-faint); font-size: .95rem; }
.more-link a { font-weight: 500; }

/* Experience */

.exp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

.exp-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
}
.exp-head {
  display: flex; align-items: flex-start; gap: 1rem;
  margin-bottom: 1rem;
}
.exp-icon {
  flex: 0 0 auto;
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(76, 201, 240, .3);
}
.exp-head h3 { margin: 0; font-family: var(--font-head); font-size: 1.12rem; font-weight: 600; line-height: 1.3; }
.exp-org { margin: .15rem 0 0; color: var(--text-dim); font-size: .9rem; }
.exp-dates {
  margin-left: auto; flex: 0 0 auto;
  font-family: var(--font-mono); font-size: .75rem;
  color: var(--text-faint);
  border: 1px solid var(--line-strong);
  padding: .25rem .6rem; border-radius: 999px;
  white-space: nowrap;
}
.exp-card > p { margin: 0; color: var(--text-dim); font-size: .95rem; }

/* Journey / timeline */

.timeline {
  list-style: none; margin: 0; padding: 0;
  position: relative;
  max-width: 720px;
}
.timeline::before {
  content: "";
  position: absolute; left: 8px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(var(--accent), rgba(76,201,240,.05));
}
.timeline li { position: relative; padding: 0 0 2.6rem 2.6rem; }
.timeline li:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute; left: 0; top: 6px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 12px rgba(76, 201, 240, .4);
}
.tl-date {
  margin: 0 0 .3rem;
  font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .1em; text-transform: uppercase; color: var(--accent);
}
.tl-body h3 { margin: 0 0 .4rem; font-family: var(--font-head); font-size: 1.15rem; font-weight: 600; }
.tl-body p:last-child { margin: 0; color: var(--text-dim); font-size: .96rem; }

/* Contact */

.contact { text-align: center; }
.contact .section-label { margin-bottom: .8rem; }
.contact .section-title { margin-bottom: 1.4rem; }
.contact-inner { max-width: 720px; }
.contact-copy { color: var(--text-dim); font-size: 1.08rem; margin: 0 0 2.4rem; }
.contact-actions {
  display: flex; flex-wrap: wrap; justify-content: center; gap: .9rem;
}

/* Buttons */

.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-body); font-weight: 600; font-size: .95rem;
  padding: .78rem 1.5rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .2s, background .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: var(--accent); color: #05131c;
  box-shadow: 0 8px 28px rgba(76, 201, 240, .28);
}
.btn-primary:hover { background: #6dd5f5; }
.btn-ghost {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(148, 178, 215, .05);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.copied { background: #2dd4a7; box-shadow: 0 8px 28px rgba(45, 212, 167, .3); }

/* Footer */

.footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.4rem;
  background: rgba(7, 13, 24, .8);
}
.footer-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem;
}
.footer p { margin: 0; color: var(--text-faint); font-size: .88rem; }
.footer-note { font-family: var(--font-mono); font-size: .78rem; }
.footer-social { display: flex; gap: 1rem; }
.footer-social a {
  color: var(--text-dim);
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  transition: color .2s, border-color .2s;
}
.footer-social a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }

/* Reveal animations */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ============ Pi architecture ============ */

.arch-intro {
  margin: -1.4rem 0 2.6rem; max-width: 46rem;
  color: var(--text-dim); font-size: 1.04rem;
}

.arch-stage {
  position: relative;
  aspect-ratio: 1080 / 1000;
  width: 100%;
  container-type: inline-size;
}

.arch-overlay {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  overflow: visible;
}

/* ---- flows ---- */

.arch-flow {
  fill: none;
  stroke: rgba(76, 201, 240, .55);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-dasharray: 5 7;
  animation: archflow 1.5s linear infinite;
  transition: stroke .25s, filter .25s;
}
.arch-flow-rf { stroke: rgba(255, 209, 102, .6); }
.arch-flow-dim { stroke: rgba(159, 176, 197, .42); }
.arch-flow.lit {
  stroke: var(--accent);
  filter: drop-shadow(0 0 6px rgba(76, 201, 240, .9));
}
.arch-flow-rf.lit {
  stroke: var(--gold);
  filter: drop-shadow(0 0 6px rgba(255, 209, 102, .9));
}
.arch-flow-dim.lit { stroke: var(--text); }
@keyframes archflow { to { stroke-dashoffset: -24; } }

.arch-pulse {
  fill: var(--accent);
  filter: drop-shadow(0 0 7px rgba(76, 201, 240, .95));
}
.arch-pulse-rf {
  fill: var(--gold);
  filter: drop-shadow(0 0 7px rgba(255, 209, 102, .95));
}

/* ---- cards (shared) ---- */

.arch-card {
  position: absolute; left: var(--x); top: var(--y);
  width: var(--w); height: var(--h);
  display: flex; flex-direction: column;
  justify-content: center;
  gap: clamp(.1rem, .2cqw, .24rem);
  padding: clamp(.38rem, .5cqw, .55rem) clamp(.45rem, .62cqw, .68rem);
  background: linear-gradient(155deg, rgba(30, 48, 78, .85), #101c33 75%);
  border: 1px solid rgba(148, 178, 215, .3);
  border-radius: clamp(8px, 1.05cqw, 11px);
  cursor: default;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.arch-card:hover {
  transform: translateY(-3px);
  border-color: rgba(76, 201, 240, .6);
  box-shadow: 0 14px 34px rgba(2, 6, 14, .6), 0 0 0 1px rgba(76, 201, 240, .22);
}
.arch-card.rf {
  background: linear-gradient(155deg, rgba(64, 52, 24, .5), #141c30 75%);
  border-color: rgba(255, 209, 102, .3);
}
.arch-card.rf:hover { border-color: rgba(255, 209, 102, .6); }
.arch-card.io {
  background: linear-gradient(155deg, rgba(23, 37, 60, .9), #0d1729 80%);
}

.arch-card-top { display: flex; align-items: center; gap: clamp(.3rem, .43cqw, .5rem); }
.arch-ico {
  width: clamp(11px, 1.43cqw, 15px); height: clamp(11px, 1.43cqw, 15px);
  flex: 0 0 auto; color: var(--accent);
}
.rf .arch-ico { color: var(--gold); }
.arch-led {
  margin-left: auto;
  width: clamp(4px, .57cqw, 6px); height: clamp(4px, .57cqw, 6px);
  border-radius: 50%;
  background: #2dd4a7;
  box-shadow: 0 0 8px rgba(45, 212, 167, .9);
  animation: pulse 2.6s infinite;
}
.arch-led.rf { background: var(--gold); box-shadow: 0 0 8px rgba(255, 209, 102, .85); }
.arch-name {
  font-family: var(--font-mono);
  font-size: clamp(.56rem, 1.04cqw, .68rem); font-weight: 500; letter-spacing: .045em;
  line-height: 1.25;
  color: var(--text); white-space: nowrap;
}
.rf .arch-name { color: var(--gold); }
.arch-sub {
  font-family: var(--font-mono);
  font-size: clamp(.48rem, .88cqw, .58rem); letter-spacing: .02em;
  line-height: 1.25;
  color: var(--text-faint); white-space: nowrap;
}
.arch-src {
  font-family: var(--font-mono);
  font-size: clamp(.46rem, .84cqw, .56rem); color: var(--accent); opacity: .8;
  line-height: 1.25;
  white-space: nowrap;
}

/* ---- columns ---- */

.arch-col {
  position: absolute; top: 0; bottom: 0;
  width: 16.65%;
}
.arch-col.in { left: 0; }
.arch-col.out { right: 0; }

/* ---- the Pi panel ---- */

.arch-pi {
  position: absolute;
  left: 21.3%; top: .8%;
  width: 57.4%; height: 98%;
  border-radius: 20px;
  border: 1px solid rgba(76, 201, 240, .3);
  background:
    radial-gradient(560px 300px at 28% -6%, rgba(76, 201, 240, .16), transparent 62%),
    radial-gradient(500px 340px at 85% 108%, rgba(24, 153, 201, .12), transparent 60%),
    linear-gradient(rgba(148, 178, 215, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 178, 215, .045) 1px, transparent 1px),
    linear-gradient(180deg, #0e1a31, #0a1325);
  background-size: auto, auto, 46px 46px, 46px 46px, auto;
  box-shadow:
    0 34px 90px rgba(2, 6, 14, .65),
    inset 0 1px 0 rgba(232, 238, 247, .06);
}

.arch-pi-head {
  position: absolute;
  left: 3.2%; top: 1.3%;
  width: 93.5%; height: 7.6%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0 .2rem;
}
.arch-pi-title {
  font-family: var(--font-mono);
  font-size: clamp(.66rem, 1.24cqw, .8rem); font-weight: 600; letter-spacing: .22em;
  color: var(--text);
}
.arch-pi-sub {
  font-family: var(--font-mono);
  font-size: clamp(.48rem, .9cqw, .58rem); letter-spacing: .05em;
  color: var(--text-faint); margin-top: .15rem; white-space: nowrap;
}
.arch-uptime {
  display: inline-flex; align-items: center; gap: .45rem;
  font-family: var(--font-mono); font-size: clamp(.52rem, .96cqw, .62rem); letter-spacing: .12em;
  color: #2dd4a7;
  border: 1px solid rgba(45, 212, 167, .35);
  background: rgba(45, 212, 167, .08);
  padding: .28rem .6rem; border-radius: 999px;
  white-space: nowrap;
}
.arch-uptime i {
  width: 6px; height: 6px; border-radius: 50%;
  background: #2dd4a7;
  box-shadow: 0 0 8px rgba(45, 212, 167, .9);
  animation: pulse 2.6s infinite;
}

/* ---- bands inside the Pi ---- */

.arch-band {
  position: absolute;
  left: var(--x); top: var(--y);
  width: var(--w); height: var(--h);
  border-radius: clamp(10px, 1.33cqw, 14px);
  padding: clamp(1.05rem, 2cqw, 1.35rem) clamp(.4rem, .52cqw, .55rem) clamp(.4rem, .52cqw, .55rem);
}
.arch-band-svc {
  background: rgba(76, 201, 240, .05);
  border: 1px solid rgba(76, 201, 240, .24);
}
.arch-band-rf {
  background: rgba(255, 209, 102, .05);
  border: 1px solid rgba(255, 209, 102, .22);
}
.arch-band-ops {
  background: rgba(148, 178, 215, .04);
  border: 1px solid rgba(148, 178, 215, .24);
}
.arch-band-tag {
  position: absolute; top: clamp(.3rem, .55cqw, .48rem); left: clamp(.4rem, .65cqw, .68rem);
  font-family: var(--font-mono);
  font-size: clamp(.48rem, .85cqw, .58rem); letter-spacing: .24em;
  color: var(--text-faint);
}
.arch-band-rf .arch-band-tag { color: rgba(255, 209, 102, .8); }
.arch-band-svc .arch-band-tag { color: rgba(76, 201, 240, .8); }

/* ---- legend / chips ---- */

.arch-legend {
  display: flex; flex-wrap: wrap; gap: 1.4rem;
  margin: 1.4rem 0 0;
  font-family: var(--font-mono); font-size: .78rem; color: var(--text-faint);
}
.arch-legend span { display: inline-flex; align-items: center; gap: .5rem; }
.arch-legend i { width: 22px; height: 0; border-top: 2px dashed var(--accent); }
.arch-legend i.rf { border-color: var(--gold); }
.arch-legend i.dim { border-color: var(--text-faint); }
.arch-chips { margin-top: 1.4rem; }

/* ---- responsive: stacked layout ---- */

@media (max-width: 900px) {
  .arch-stage { aspect-ratio: auto; display: flex; flex-direction: column; gap: .7rem; }
  .arch-overlay { display: none; }
  .arch-col { position: static; width: auto; display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
  .arch-card { position: static; width: auto; height: auto; }
  .arch-pi { position: static; width: auto; height: auto; padding: .9rem .7rem .7rem; }
  .arch-pi-head { position: static; width: auto; height: auto; flex-wrap: wrap; margin-bottom: .8rem; }
  .arch-band { position: static; width: auto; height: auto; margin-top: .7rem; display: grid; grid-template-columns: 1fr 1fr; gap: .55rem; padding: 1.5rem .55rem .55rem; }
  .arch-band-tag { left: .6rem; }
}
@media (max-width: 540px) {
  .arch-col, .arch-band { grid-template-columns: 1fr; }
  .arch-pi-sub { white-space: normal; }
}

/* ============ Devlog ============ */

.page-hero { padding: 150px 0 0; }
.page-hero .section-title { margin-bottom: 1.2rem; }
.page-hero .lead { margin: 0 0 3rem; max-width: 40rem; color: var(--text-dim); font-size: 1.08rem; }
.feed-link {
  font-family: var(--font-mono); font-size: .8em;
  color: var(--accent); white-space: nowrap;
}

/* 404 */

.notfound .section-title { margin-bottom: 2.2rem; }
.nf-terminal { max-width: 480px; margin: 0 0 2.4rem; }
.nf-path { color: var(--text); }
.nf-code { color: var(--gold); }
.nf-out { color: var(--text-dim); }
.nf-dim { color: var(--text-faint); }

.nav-links > a[aria-current="page"] { color: var(--text); }

.post-list { display: grid; gap: 1.5rem; padding-bottom: 96px; }

.post-card {
  display: block;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.8rem;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: rgba(76, 201, 240, .45);
  box-shadow: var(--shadow);
}

.post-meta {
  display: flex; align-items: center; gap: .8rem; flex-wrap: wrap;
  margin-bottom: .8rem;
  font-family: var(--font-mono); font-size: .78rem;
  color: var(--text-faint);
}
.post-tag {
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(76, 201, 240, .3);
  padding: .22rem .6rem; border-radius: 999px;
}
.post-card h2 { margin: 0 0 .6rem; font-family: var(--font-head); font-size: 1.35rem; font-weight: 600; line-height: 1.25; }
.post-card h2 a { color: var(--text); }
.post-card:hover h2 a { color: var(--accent); text-decoration: none; }
.post-card > p { margin: 0; color: var(--text-dim); font-size: .96rem; }

/* Single post */

.post-header { padding: 150px 0 2.5rem; }
.post-title {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 4.5vw, 2.7rem);
  font-weight: 700; letter-spacing: -.015em; line-height: 1.12;
}
.post-body { max-width: 760px; padding-bottom: 96px; }
.post-body h2 {
  font-family: var(--font-head); font-size: 1.45rem; font-weight: 600;
  margin: 2.8rem 0 1rem; padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}
.post-body h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.post-body h3 { font-family: var(--font-head); font-size: 1.1rem; font-weight: 600; margin: 1.8rem 0 .4rem; }
.post-body p { color: var(--text-dim); margin: 0 0 1rem; }
.post-body ul { color: var(--text-dim); padding-left: 1.25rem; margin: 0 0 1.2rem; }
.post-body li { margin: .5rem 0; }
.post-body li::marker { color: var(--accent); }
.post-body strong { color: var(--text); }
.post-body code {
  font-family: var(--font-mono); font-size: .85em;
  background: rgba(148, 178, 215, .1);
  border: 1px solid var(--line);
  border-radius: 6px; padding: .08rem .4rem;
}
.post-back {
  display: inline-flex; align-items: center; gap: .45rem;
  font-weight: 600; font-size: .92rem; margin-top: 2rem;
}

/* ============ Boot splash ============ */

.boot-screen {
  position: fixed; inset: 0; z-index: 200;
  display: none;
  place-items: center;
  font-family: var(--font-mono);
  background:
    radial-gradient(1100px 500px at 85% -5%, rgba(76, 201, 240, .08), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(24, 153, 201, .07), transparent 55%),
    var(--bg);
  color: var(--text-dim);
  cursor: pointer;
  opacity: 1;
  transition: opacity .55s ease;
}
html.boot .boot-screen { display: grid; }
html.boot body { overflow: hidden; }

.boot-screen::after {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, .018) 0 1px, transparent 1px 3px);
  pointer-events: none;
}
.boot-screen.done { opacity: 0; pointer-events: none; }

.boot-inner {
  width: min(92vw, 520px);
  font-size: .78rem; line-height: 1.8;
}
.boot-head {
  display: flex; justify-content: space-between; gap: 1rem;
  font-size: .66rem; letter-spacing: .18em; color: var(--text-faint);
  border-bottom: 1px solid var(--line);
  padding-bottom: .55rem; margin-bottom: .9rem;
}
.boot-line { white-space: nowrap; overflow: hidden; }
.boot-ok { color: #2dd4a7; font-weight: 500; }
.boot-prompt { color: var(--accent); }
.boot-out { color: var(--text); margin-top: .35rem; }
.boot-skip {
  position: absolute; right: 1.2rem; bottom: 1rem;
  margin: 0; font-size: .64rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--text-faint);
}

@media (max-width: 540px) {
  .boot-inner { font-size: .66rem; }
}

/* ============ Responsive ============ */

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-radar { order: -1; }
  .hero-radar svg { width: min(60vw, 300px); }
  .about-grid { grid-template-columns: 1fr; gap: 2.2rem; }
  .project-grid, .exp-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1.6rem 1rem; }
  .stat:nth-child(3) { border-left: 0; }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(7, 13, 24, .97);
    border-bottom: 1px solid var(--line);
    padding: .5rem 24px 1rem;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform .25s, opacity .25s;
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links > a { padding: .85rem 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
  .nav-links > a:last-child { border-bottom: 0; width: fit-content; margin-top: .8rem; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero { padding-top: 120px; }
  .section { padding: 72px 0; }
  .exp-dates { display: none; }
}