/* ============================================================
   Amit Aminov — personal site
   Theme: "Lunar Intelligence" — a moonrise visual system for an
   AI / Data / formal-reasoning portfolio.

   Foundation Void #08081B; elevated Orbit surfaces #121A3A.
   Violet / lavender = primary identity accents. Coral / peach only
   at the moonrise horizon + rare emphasis. Cyan = graph lines,
   active states, focus rings. Pulse green = rare status only.

   Self-hosted fonts (no network requests). Motion is transform /
   opacity only and lives in assets/lunar-motion.js; the static
   scene is complete without JavaScript and under reduced motion.
   ============================================================ */

/* ---- self-hosted fonts -------------------------------------- */
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("assets/fonts/spacegrotesk-600.woff2") format("woff2");
}
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("assets/fonts/spacegrotesk-700.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/fonts/inter-400.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("assets/fonts/inter-500.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("assets/fonts/ibmplexmono-500.woff2") format("woff2");
}

/* ---- tokens -------------------------------------------------- */
:root {
  --bg: #08081b; /* Void — page foundation */
  --surface: #121a3a; /* Orbit — elevated surfaces */
  --text: #f4f1ff;
  --muted: #b8b4d2;
  --signal: #6e56cf; /* violet identity */
  --lavender: #b9a7ff;
  --horizon: #ff8a78; /* coral — horizon + rare emphasis only */
  --moon: #f7d7b5; /* peach */
  --data: #78e7e7; /* cyan — graph lines, active, focus */
  --pulse: #c8ff9b; /* rare status only */
  --line: #32385a;

  --radius-card: 18px;
  --radius-btn: 12px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  --measure: 68ch;
  --display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas,
    monospace;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1.0625rem; /* 17px */
  line-height: 1.6;
  overflow-x: hidden;
}

/* faint radial bloom behind the content foundation */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(
      70% 50% at 78% 8%,
      rgba(110, 86, 207, 0.14),
      transparent 60%
    ),
    radial-gradient(60% 40% at 12% 30%, rgba(120, 231, 231, 0.05), transparent 60%);
}

.container {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

p {
  max-width: var(--measure);
}

/* ---- skip link ---------------------------------------------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  background: var(--surface);
  color: var(--text);
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius-btn) 0;
  border: 1px solid var(--data);
}
.skip-link:focus {
  left: 0;
}

/* ============================================================
   TOP NAV — transparent over hero, frosted after scroll
   ============================================================ */
.topnav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background-color 0.25s ease, backdrop-filter 0.25s ease,
    border-color 0.25s ease;
  border-bottom: 1px solid transparent;
  /* subtle top scrim so links stay legible over the sky */
  background: linear-gradient(
    to bottom,
    rgba(8, 8, 27, 0.55),
    rgba(8, 8, 27, 0)
  );
}
.topnav.is-stuck {
  background: rgba(8, 11, 27, 0.86);
  backdrop-filter: blur(8px);
  border-bottom-color: var(--line);
}
.topnav__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.7rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.topnav__brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
}
.topnav__brand:hover {
  color: var(--lavender);
}
.topnav__links {
  list-style: none;
  display: flex;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}
.topnav__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.7rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.topnav__links a:hover {
  color: var(--text);
}
.topnav__links a.is-active {
  color: var(--text);
  border-bottom-color: var(--data);
}

/* ============================================================
   BUTTONS — compact 12px radius, >=44px targets
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-btn);
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.98rem;
  text-decoration: none;
  color: var(--text);
  background: rgba(18, 26, 58, 0.7);
  border: 1px solid var(--line);
  transition: border-color 0.12s ease, background-color 0.12s ease,
    color 0.12s ease;
}
.btn:hover {
  border-color: var(--lavender);
  color: var(--text);
}
.btn--primary {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--text);
  font-weight: 600;
}
.btn--primary:hover {
  background: #7d66db;
  border-color: var(--lavender);
}

/* ---- clipboard toast ---------------------------------------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.6rem;
  transform: translateX(-50%) translateY(12px);
  z-index: 200;
  max-width: min(92vw, 30rem);
  padding: 0.7rem 1.05rem;
  background: rgba(18, 26, 58, 0.97);
  color: var(--text);
  border: 1px solid var(--data);
  border-radius: var(--radius-btn);
  box-shadow: 0 10px 30px rgba(4, 5, 16, 0.6);
  font-size: 0.92rem;
  line-height: 1.3;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast .toast-email {
  font-family: var(--mono);
  color: var(--data);
}

/* ---- global focus ring -------------------------------------- */
a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--data);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ============================================================
   HERO — Lunar Intelligence moonrise
   ============================================================ */
.hero {
  position: relative;
  isolation: isolate;
  min-height: 92svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg);
  padding: 5rem 0 2rem;
}

.hero__grid {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 54% 46%;
  align-items: center;
  gap: 1.5rem;
}

/* ---- copy column -------------------------------------------- */
.hero__copy {
  position: relative;
  max-width: 34rem;
}
/* local navy scrim under the copy so text keeps AA over the sky */
.hero__copy::before {
  content: "";
  position: absolute;
  inset: -1.5rem -2rem -1.5rem -2rem;
  z-index: -1;
  background: radial-gradient(
    120% 120% at 20% 40%,
    rgba(8, 8, 27, 0.72),
    rgba(8, 8, 27, 0.28) 55%,
    transparent 78%
  );
  pointer-events: none;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--data);
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(3rem, 7vw, 6.5rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0 0 0.6rem;
  color: var(--text);
}

.hero .tagline {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.2;
  margin: 0 0 0.7rem;
  color: var(--lavender);
  max-width: 24ch;
}

.hero .subline {
  margin: 0 0 1.6rem;
  color: var(--muted);
  max-width: 42ch;
  text-wrap: balance;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---- portrait ----------------------------------------------- */
.hero__portrait {
  position: relative;
  z-index: 3;
  justify-self: center;
  width: 100%;
  max-width: 460px;
}
.hero__portrait picture,
.hero__portrait img {
  display: block;
  width: 100%;
  height: auto;
}
.hero__portrait img {
  /* violet rim light + deep-navy shadow, applied in CSS (not baked in) */
  /* tight violet rim light (left) + deep-navy separation, no broad haze */
  filter: drop-shadow(-2px 0 4px rgba(185, 167, 255, 0.55))
    drop-shadow(3px 2px 5px rgba(8, 8, 24, 0.55))
    drop-shadow(0 16px 30px rgba(4, 5, 16, 0.72));
  -webkit-mask-image: linear-gradient(to bottom, #000 84%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 84%, transparent 100%);
}

/* ============================================================
   HERO SCENE — decorative moonrise (aria-hidden)
   ============================================================ */
.hero__scene {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

/* layered sky: Void -> indigo/violet -> muted coral -> peach horizon */
.sky {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    #08081b 0%,
    #08081b 30%,
    #1a1746 48%,
    #34276b 58%,
    #6a4a80 70%,
    #ff8a78 80%,
    #f7d7b5 88%,
    #0b0c22 100%
  );
}
/* left navy scrim to protect text-side contrast; keeps glow on the right */
.sky::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(8, 8, 27, 0.8) 0%,
    rgba(8, 8, 27, 0.42) 34%,
    rgba(8, 8, 27, 0) 60%
  );
}

/* atmospheric glow behind text + portrait */
.moon-glow {
  position: absolute;
  left: 83.5%;
  top: 38%;
  width: clamp(420px, 52vw, 820px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(185, 167, 255, 0.32) 0%,
    rgba(110, 86, 207, 0.2) 34%,
    rgba(110, 86, 207, 0.08) 56%,
    transparent 72%
  );
  filter: blur(4px);
}

/* the moon disc — offset behind-right so the portrait fronts its lower-left edge */
.moon {
  position: absolute;
  left: 83.5%;
  top: 38%;
  width: clamp(260px, 30vw, 480px);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(
    circle at 38% 36%,
    #fdeed7 0%,
    #f7d7b5 52%,
    #ecc59d 78%,
    #d8ac82 100%
  );
  box-shadow: 0 0 60px rgba(247, 215, 181, 0.28);
}
/* faint craters */
.moon::before,
.moon::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(199, 160, 120, 0.35);
}
.moon::before {
  width: 12%;
  height: 12%;
  left: 54%;
  top: 40%;
}
.moon::after {
  width: 8%;
  height: 8%;
  left: 60%;
  top: 62%;
  box-shadow: -3.4em 0.4em 0 -0.2em rgba(199, 160, 120, 0.28);
}

/* constellation in the upper field, density toward the right */
.constellation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 56%;
}
.con-nodes circle {
  filter: drop-shadow(0 0 4px rgba(120, 231, 231, 0.7));
}

/* faceted low-poly terrain along the bottom */
.terrain {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 26%;
}
.terrain-fill polygon {
  fill: #0e1330;
  stroke: none;
}
.terrain-fill polygon:nth-child(even) {
  fill: #131a3d;
}

/* geometric particle field (leaf replacement) */
.particles {
  position: absolute;
  inset: 0;
}
.pcl {
  position: absolute;
  width: var(--s);
  height: var(--s);
  opacity: 0.26;
  overflow: visible;
}

/* ============================================================
   CONTENT SECTIONS
   ============================================================ */
main > .container > section {
  padding: 2.6rem 0;
}
main > .container > section + section {
  border-top: 1px solid var(--line);
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.7rem;
  letter-spacing: -0.005em;
  color: var(--text);
  margin: 0 0 1rem;
}

h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.12rem;
  color: var(--text);
  margin: 0 0 0.25rem;
}

/* section dividers — one sparse motif per transition */
.section-divider {
  height: 30px;
  margin: 0 0 1.3rem;
  background-repeat: no-repeat;
  background-position: left center;
  opacity: 0.9;
}
.section-divider[data-motif="arc"] {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='170' height='30'%3E%3Cpath d='M5 26 A130 130 0 0 1 165 26' fill='none' stroke='%236E56CF' stroke-width='1.4' opacity='0.75'/%3E%3Ccircle cx='85' cy='3.6' r='2.6' fill='%2378E7E7'/%3E%3C/svg%3E");
}
.section-divider[data-motif="constellation"] {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='210' height='30'%3E%3Cpolyline points='10,22 62,8 118,23 180,10' fill='none' stroke='%2378E7E7' stroke-width='1' opacity='0.5'/%3E%3Cg fill='%23B9A7FF'%3E%3Ccircle cx='10' cy='22' r='2.4'/%3E%3Ccircle cx='62' cy='8' r='2.8'/%3E%3Ccircle cx='118' cy='23' r='2.4'/%3E%3Ccircle cx='180' cy='10' r='2.6'/%3E%3C/g%3E%3C/svg%3E");
}
.section-divider[data-motif="horizon"] {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='230' height='30'%3E%3Cpolyline points='4,24 52,10 100,20 154,6 226,22' fill='none' stroke='%23B9A7FF' stroke-width='1.2' opacity='0.6'/%3E%3C/svg%3E");
}

/* ---- links -------------------------------------------------- */
a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--data);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
  transition: color 0.12s ease, text-decoration-thickness 0.12s ease;
}
a:hover {
  color: var(--data);
  text-decoration-thickness: 3px;
}

/* ---- timeline (neural-path spine) --------------------------- */
.timeline {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  max-width: var(--measure);
}
.timeline li {
  display: flex;
  gap: 1rem;
  padding: 0.5rem 0;
  border-left: 2px solid var(--line);
  padding-left: 1rem;
  margin-left: 0.2rem;
  transition: border-left-color 0.12s ease;
}
.timeline li:hover {
  border-left-color: var(--data);
}
.timeline .when {
  flex: 0 0 6.5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.85rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---- project cards ------------------------------------------ */
.projects {
  list-style: none;
  margin: 0;
  padding: 0;
}
.project {
  display: flex;
  gap: 1.4rem;
  align-items: flex-start;
  padding: 1.4rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  position: relative;
  transition: border-color 0.18s ease;
}
.project + .project {
  margin-top: 1rem;
}
/* internal graph line that nudges 4px on hover */
.project::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--signal),
    var(--data),
    transparent
  );
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.project:hover {
  border-color: var(--lavender);
}
.project:hover::after {
  opacity: 0.9;
  transform: translateX(0);
}
.project .thumb {
  flex: 0 0 11rem;
  width: 11rem;
}
.project .thumb img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  transition: filter 0.18s ease;
}
.project .thumb img.cover {
  object-fit: cover;
  object-position: top;
}
.project:hover .thumb img {
  filter: contrast(1.06);
}
.project .desc p {
  margin: 0.25rem 0 0.5rem;
  color: var(--muted);
}
.project .desc p.sublink {
  margin: -0.15rem 0 0.55rem;
  font-size: 0.92rem;
}
.project .desc p.sublink a {
  color: var(--text);
}

/* ---- project card: scannable summary / problem-method-result / stack ---- */
.project .desc .summary {
  margin: 0.15rem 0 0.6rem;
  color: var(--text);
  font-weight: 500;
}
.project .desc .pmr {
  margin: 0 0 0.55rem;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 0.85rem;
  row-gap: 0.3rem;
}
.project .desc .pmr dt {
  margin: 0;
  padding-top: 0.14rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--data);
}
.project .desc .pmr dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}
.project .desc .stack {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--lavender);
}
.project .desc .stack .stack-label {
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-right: 0.4rem;
}

/* ---- chips (categorical, mono labels) ----------------------- */
.chips {
  list-style: none;
  margin: 0.3rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.chip {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.16rem 0.6rem;
  border-radius: var(--radius-btn);
  border: 1px solid currentColor;
}
.chip.llm {
  color: var(--lavender);
  background: rgba(185, 167, 255, 0.1);
}
.chip.mlearn {
  /* sunrise orange, echoing the hero horizon */
  color: var(--horizon);
  background: rgba(255, 138, 120, 0.1);
}
.chip.signal {
  /* navy-blue family, legible on the dark surface */
  color: #8fb0ff;
  background: rgba(96, 130, 235, 0.12);
}
.chip.stats {
  color: var(--data);
  background: rgba(120, 231, 231, 0.09);
}
.chip.eng {
  color: var(--moon);
  background: rgba(247, 215, 181, 0.09);
}

/* ---- skills ------------------------------------------------- */
.skills dl {
  margin: 0;
  max-width: var(--measure);
}
.skills dt {
  font-family: var(--display);
  font-weight: 600;
  color: var(--text);
  margin-top: 0.9rem;
  padding-left: 0.8rem;
  border-left: 3px solid var(--signal);
}
.skills dt:first-of-type {
  margin-top: 0;
}
.skills dt.sk-ml {
  color: var(--horizon);
  border-left-color: var(--horizon);
}
.skills dt.sk-llm {
  color: var(--lavender);
  border-left-color: var(--signal);
}
.skills dt.sk-stats {
  /* cyan, matching the Statistics chip label */
  color: var(--data);
  border-left-color: var(--data);
}
.skills dt.sk-eng {
  /* moon/yellow, matching the Engineering chip label */
  color: var(--moon);
  border-left-color: var(--moon);
}
.skills dt.sk-formal {
  /* violet — the formal-reasoning research identity */
  color: var(--lavender);
  border-left-color: var(--lavender);
}
.skills dt.sk-data {
  /* signal-blue, matching the Signal Processing chip family */
  color: #8fb0ff;
  border-left-color: #8fb0ff;
}
.skills dd {
  margin: 0.15rem 0 0;
  padding-left: 0.8rem;
  color: var(--muted);
}

/* ============================================================
   FOOTER — low-intensity horizon + static moon arc
   ============================================================ */
.site-footer {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: 3rem;
  color: var(--text);
  background: var(--bg);
  border-top: 1px solid var(--line);
}
.site-footer__scene {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.footer-horizon {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(255, 138, 120, 0.1) 0%,
    rgba(110, 86, 207, 0.1) 34%,
    rgba(8, 8, 27, 0) 70%
  );
}
/* small static moon arc peeking from the bottom-right */
.footer-moon {
  position: absolute;
  right: 8%;
  bottom: -70px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(
    circle at 42% 38%,
    rgba(247, 215, 181, 0.5),
    rgba(236, 197, 157, 0.28) 60%,
    transparent 78%
  );
}
.site-footer__inner {
  position: relative;
  z-index: 1;
  padding-top: 3rem;
  padding-bottom: 2.6rem;
}
.site-footer h2 {
  color: var(--text);
}
.footer-closing {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--lavender);
  margin: 1rem 0 0;
}
.colophon {
  margin: 1.8rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.82rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
/* tablet */
@media (max-width: 1024px) {
  .moon,
  .moon-glow {
    left: 74%;
  }
  .moon {
    width: clamp(300px, 42vw, 520px);
  }
}

/* stack: copy above portrait */
@media (max-width: 760px) {
  .hero {
    min-height: 94svh;
    padding-top: 4.5rem;
  }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .hero__portrait {
    order: 2;
    max-width: 320px;
  }
  .hero h1 {
    font-size: clamp(2.6rem, 12vw, 3.6rem);
  }
  .moon,
  .moon-glow {
    left: 62%;
    top: 62%;
    width: 75vw;
  }
  .moon-glow {
    width: 92vw;
  }
  .terrain {
    height: 18svh;
  }
  .topnav__inner {
    padding: 0.7rem 0.85rem;
  }
  .topnav__brand {
    font-size: 0.88rem;
  }
  .topnav__links {
    display: none; /* single-page mobile: brand only; hero carries Email/GitHub/CV */
  }
  .project {
    flex-direction: column;
    gap: 0.9rem;
    padding: 1.1rem;
  }
  .project .thumb {
    flex-basis: auto;
    width: 100%;
    max-width: 20rem;
  }
  .timeline li {
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0 0.5rem 1rem;
  }
  .timeline .when {
    flex: none;
  }
}

/* below 480px: thin the ambient particle field ~40% */
@media (max-width: 480px) {
  .pcl--dense {
    display: none;
  }
  h2 {
    font-size: 1.45rem;
  }
}

/* ============================================================
   MOTION — gated behind html.js-anim (set by JS only when motion
   is allowed). No JS and reduced motion => complete static scene.
   ============================================================ */
html.js-anim .sky {
  opacity: 0;
  animation: sky-in 0.9s var(--ease-out) forwards;
}
html.js-anim .moon,
html.js-anim .moon-glow {
  opacity: 0;
  transform: translate(-50%, calc(-50% + 48px)) scale(0.96);
  animation: moon-rise 1.45s var(--ease-out) 0.15s forwards;
}
html.js-anim .terrain {
  opacity: 0;
  transform: translateY(24px);
  animation: terrain-in 0.9s var(--ease-out) 0.35s forwards;
}
html.js-anim .eyebrow,
html.js-anim .hero h1,
html.js-anim .hero .tagline,
html.js-anim .hero .subline,
html.js-anim .hero__actions {
  opacity: 0;
  transform: translateY(12px);
  animation: copy-in 0.7s var(--ease-out) forwards;
}
html.js-anim .eyebrow {
  animation-delay: 0.6s;
}
html.js-anim .hero h1,
html.js-anim .hero .tagline {
  animation-delay: 0.69s;
}
html.js-anim .hero .subline,
html.js-anim .hero__actions {
  animation-delay: 0.78s;
}
html.js-anim .hero__portrait {
  opacity: 0;
  transform: translateX(18px);
  animation: portrait-in 1.2s var(--ease-out) 1.2s forwards;
}
/* constellation: draw paths left-to-right, nodes fade in as paths finish */
html.js-anim .con-paths path {
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  animation: draw 1.3s var(--ease-out) forwards;
}
html.js-anim .con-paths path:nth-child(1) { animation-delay: 0.9s; }
html.js-anim .con-paths path:nth-child(2) { animation-delay: 1.05s; }
html.js-anim .con-paths path:nth-child(3) { animation-delay: 1.2s; }
html.js-anim .con-paths path:nth-child(4) { animation-delay: 1.35s; }
html.js-anim .con-paths path:nth-child(5) { animation-delay: 1.5s; }
html.js-anim .con-paths path:nth-child(6) { animation-delay: 1.65s; }
html.js-anim .con-paths path:nth-child(7) { animation-delay: 1.8s; }
html.js-anim .con-paths path:nth-child(8) { animation-delay: 1.95s; }
html.js-anim .con-nodes circle {
  opacity: 0;
  animation: node-in 0.5s ease forwards;
}
html.js-anim .con-nodes circle:nth-child(n) { animation-delay: 1.6s; }

/* ambient: particle drift + node breathing */
html.js-anim .pcl {
  animation: drift var(--dur, 20s) ease-in-out var(--del, 0s) infinite alternate;
}
html.js-anim .con-nodes circle:nth-child(2),
html.js-anim .con-nodes circle:nth-child(5) {
  transform-box: fill-box;
  transform-origin: center;
  animation: breathe 4.5s ease-in-out 2.4s infinite;
}

/* suspend ambient motion when tab hidden */
html.is-hidden .pcl,
html.is-hidden .con-nodes circle {
  animation-play-state: paused !important;
}

/* optional pointer parallax (JS sets --px/--py; coarse pointers excluded) */
html.js-anim .moon,
html.js-anim .moon-glow {
  --px: 0px;
  --py: 0px;
}

@keyframes sky-in {
  to { opacity: 1; }
}
@keyframes moon-rise {
  to {
    opacity: 1;
    transform: translate(calc(-50% + var(--px, 0px)), calc(-50% + var(--py, 0px)))
      scale(1);
  }
}
@keyframes terrain-in {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes copy-in {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes portrait-in {
  to { opacity: 1; transform: translateX(0); }
}
@keyframes draw {
  to { stroke-dashoffset: 0; }
}
@keyframes node-in {
  to { opacity: 1; }
}
@keyframes drift {
  from { transform: translate(0, 0) rotate(0deg); }
  to { transform: translate(var(--dx, 20px), var(--dy, -16px)) rotate(var(--r, 12deg)); }
}
@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.18); }
}

/* ---- reduced motion: complete static scene ------------------ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}