/* Base reset (a standalone page needs it) */
:root { color-scheme: light; padding-top: env(safe-area-inset-top, 0px); padding-bottom: env(safe-area-inset-bottom, 0px); }
body { margin: 0; }
img { max-width: 100%; }
[hidden] { display: none !important; }

/* Layout: a one-page night-sky atlas. Sticky chart-room header, a hero drawn over a star field and astrolabe ring, then five gold-ruled sections: about, instruments, catalogue, record, correspondence. */
:root {
  --bg: #0A0F1E;
  --panel: #0F1730;
  --ink: #E9E6DC;
  --muted: #929CBA;
  --rule: #25304F;
  --gold: #D6B466;
  --star: #E9E6DC;
  --ring: #3A4A78;
  --glow: rgba(214, 180, 102, 0.45);
  --disc-hi: #F4E2B0;
  --f-display: 'Italiana', 'Didot', 'Bodoni 72', Georgia, serif;
  --f-body: 'Jost', 'Avenir Next', 'Century Gothic', system-ui, sans-serif;
  --f-mono: 'DM Mono', ui-monospace, Menlo, Consolas, monospace;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #EDF0F6;
    --panel: #E1E6F0;
    --ink: #121A33;
    --muted: #4F5878;
    --rule: #C3CADC;
    --gold: #8A6414;
    --star: #121A33;
    --ring: #A7B0CB;
    --glow: rgba(138, 100, 20, 0);
    --disc-hi: #C9A24C;
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #EDF0F6;
  --panel: #E1E6F0;
  --ink: #121A33;
  --muted: #4F5878;
  --rule: #C3CADC;
  --gold: #8A6414;
  --star: #121A33;
  --ring: #A7B0CB;
  --glow: rgba(138, 100, 20, 0);
  --disc-hi: #C9A24C;
  color-scheme: light;
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

* { box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.65;
}
.wrap { max-width: 72rem; margin-inline: auto; padding-inline: clamp(1rem, 5vw, 3rem); }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 400; }
a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--gold); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--gold); }
a:focus-visible, button:focus-visible, summary:focus-visible, .brow:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.skip { position: absolute; left: 1rem; top: -4rem; background: var(--gold); color: var(--bg); padding: 0.5rem 1rem; z-index: 40; font: 500 13px var(--f-mono); }
.skip:focus { top: 0.75rem; }

/* header */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--bg); border-bottom: 1px solid var(--rule); }
@supports (backdrop-filter: blur(8px)) {
  .top { background: color-mix(in srgb, var(--bg) 84%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
}
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.75rem; }
.brand { display: flex; align-items: center; gap: 0.65rem; font: 400 1.5rem/1 var(--f-display); text-decoration: none; color: var(--ink); letter-spacing: 0.01em; }
.brand::before, .g h3::before { content: ""; width: 0.8rem; height: 0.8rem; background: var(--gold); clip-path: polygon(50% 0, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0 50%, 39% 39%); flex: none; }
.nav { display: flex; align-items: center; gap: 1.75rem; }
.nav a { font: 400 12px var(--f-mono); letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none; color: var(--muted); padding-block: 0.4rem; border-bottom: 1px solid transparent; }
.nav a:hover, .nav a[aria-current="true"] { color: var(--ink); border-bottom-color: var(--gold); }
.tools { display: flex; align-items: center; gap: 0.5rem; }
.ibtn { width: 2.5rem; height: 2.5rem; display: grid; place-items: center; background: none; border: 1px solid var(--rule); color: var(--ink); cursor: pointer; border-radius: 0; }
.ibtn:hover { border-color: var(--gold); color: var(--gold); }
#menu-btn { display: none; }

/* hero */
.hero { position: relative; overflow: hidden; padding-block: clamp(3.5rem, 9vw, 7rem) clamp(3rem, 7vw, 5rem); }
#sky { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero-in { position: relative; display: flex; flex-direction: column; gap: 1.25rem; }
.eyebrow { font: 400 12px var(--f-mono); letter-spacing: 0.24em; text-transform: uppercase; color: var(--gold); }
h1 { font: 400 clamp(3.4rem, 11.5vw, 8.5rem)/0.98 var(--f-display); letter-spacing: 0.01em; max-width: 12ch; }
.lede { max-width: 31rem; font-size: clamp(1.1rem, 2.4vw, 1.3rem); line-height: 1.55; }
.handle { font: 400 13px var(--f-mono); color: var(--muted); letter-spacing: 0.06em; }
.cta { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 0.75rem; }
.btn { display: inline-block; font: 500 12px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; text-decoration: none; border: 1px solid var(--gold); color: var(--gold); padding: 0.75rem 1.35rem; background: transparent; cursor: pointer; border-radius: 0; }
.btn:hover { background: var(--gold); color: var(--bg); }
.btn.solid { background: var(--gold); color: var(--bg); }
.btn.solid:hover { background: transparent; color: var(--gold); }

/* sections */
section.s { padding-top: clamp(3rem, 7vw, 5.5rem); scroll-margin-top: 4.5rem; }
h2.t { display: flex; align-items: center; gap: 1.25rem; font: 500 12px var(--f-body); letter-spacing: 0.26em; text-transform: uppercase; color: var(--gold); margin-bottom: 1.75rem; }
h2.t::after { content: ""; height: 1px; flex: 1; background: var(--rule); }

.about { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 2rem clamp(2rem, 6vw, 5rem); align-items: start; }
.about-text { display: flex; flex-direction: column; gap: 1rem; font-size: 1.1rem; }
.facts { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 0.75rem 1.5rem; font-size: 15.5px; border-top: 1px solid var(--gold); padding-top: 1rem; }
.facts dt { font: 400 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding-top: 0.2rem; }
.facts dd { margin: 0; }
.focus { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 2rem; margin-top: 2.75rem; }
.focus > div { border-top: 1px solid var(--rule); padding-top: 1rem; display: flex; flex-direction: column; gap: 0.4rem; }
.focus h3 { font: 400 1.45rem/1.2 var(--f-display); letter-spacing: 0.01em; }
.focus p { color: var(--muted); }

/* skills */
.groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: 2.25rem 3rem; }
.g h3 { display: flex; align-items: center; gap: 0.7rem; font: 500 12px var(--f-body); letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); margin-bottom: 0.6rem; }
.g ul { list-style: none; margin: 0; padding: 0; columns: 2; column-gap: 1.5rem; }
.g li { padding-block: 0.3rem; border-bottom: 1px solid var(--rule); break-inside: avoid; display: flex; align-items: center; gap: 0.6rem; }
.g li.learn::after { content: ""; width: 0.55rem; height: 0.55rem; border: 1px solid var(--gold); border-radius: 50%; flex: none; }
.legend { margin-top: 1.5rem; font: 400 12px var(--f-mono); color: var(--muted); display: flex; align-items: center; gap: 0.6rem; letter-spacing: 0.04em; }
.legend i { width: 0.55rem; height: 0.55rem; border: 1px solid var(--gold); border-radius: 50%; display: inline-block; }

/* commits chart */
.chart { margin-bottom: 3rem; }
.ct { font: 400 1.5rem/1.2 var(--f-display); }
.cs { color: var(--muted); font-size: 15px; margin-top: 0.25rem; }
.bars { margin-top: 1.25rem; display: flex; flex-direction: column; gap: 0.15rem; }
.brow { display: grid; grid-template-columns: minmax(10rem, 17rem) minmax(0, 1fr) 3rem; grid-template-areas: "l t v"; gap: 0 1rem; align-items: center; padding-block: 0.1rem; }
.bl { grid-area: l; font: 400 12.5px var(--f-mono); color: var(--muted); overflow-wrap: anywhere; }
.bt { grid-area: t; position: relative; height: 1.6rem; border-left: 1px solid var(--muted); background-image: linear-gradient(to right, var(--rule) 1px, transparent 1px); background-size: calc(100% / 3.5) 100%; }
.bt i { position: absolute; left: 0; top: 50%; height: 10px; transform: translateY(-50%); background: var(--gold); border-radius: 0 4px 4px 0; min-width: 3px; }
.bv { grid-area: v; font: 400 13px var(--f-mono); font-variant-numeric: tabular-nums; text-align: right; }
.brow[data-tip]:hover .bt i, .brow[data-tip]:focus-visible .bt i { background: var(--disc-hi); }
.brow[data-tip]:hover .bl, .brow[data-tip]:focus-visible .bl { color: var(--ink); }
.axis { margin-top: 0.1rem; }
.axis .bt { border-left: 0; background: none; height: 1.4rem; }
.axis em { position: absolute; top: 0.2rem; transform: translateX(-50%); font: 400 11px var(--f-mono); color: var(--muted); font-style: normal; font-variant-numeric: tabular-nums; }
.axis-cap { grid-area: l; font: 400 11px var(--f-mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.linkbtn { margin-top: 0.75rem; background: none; border: 0; padding: 0; font: 400 13px var(--f-mono); color: var(--gold); text-decoration: underline; text-underline-offset: 4px; cursor: pointer; letter-spacing: 0.04em; }
.tview { margin-top: 1.25rem; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 0.55rem 1rem 0.55rem 0; border-bottom: 1px solid var(--rule); }
th { font: 400 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
td.m { font: 400 13px var(--f-mono); }
th.n, td.n { text-align: right; font-variant-numeric: tabular-nums; padding-right: 0; padding-left: 1rem; }
.tip { position: fixed; z-index: 50; background: var(--ink); color: var(--bg); font: 400 12px var(--f-mono); padding: 0.3rem 0.65rem; pointer-events: none; max-width: 90vw; }

/* catalogue */
.cat-note { color: var(--muted); font-size: 15px; margin-bottom: 0.75rem; }
.objs { margin: 0; padding: 0; }
.obj { border-top: 1px solid var(--rule); }
.obj:last-child { border-bottom: 1px solid var(--rule); }
.obj > summary { list-style: none; cursor: pointer; display: grid; grid-template-columns: 3.6rem minmax(0, 1fr) auto 1.6rem; gap: 0.5rem 1.5rem; align-items: center; padding-block: 1.1rem; }
.obj > summary::-webkit-details-marker { display: none; }
.obj > summary::after { content: "+"; font: 400 1.5rem/1 var(--f-mono); color: var(--gold); text-align: center; }
.obj[open] > summary::after { content: "\2212"; }
.orb { width: 3.6rem; height: 3.6rem; display: grid; place-items: center; }
.orb i { display: block; width: var(--d); height: var(--d); border-radius: 50%; background: radial-gradient(circle at 35% 32%, var(--disc-hi), var(--gold) 70%); box-shadow: 0 0 calc(var(--d) * 0.7) var(--glow); }
.obj-main { min-width: 0; }
.obj-name { font: 400 1.55rem/1.2 var(--f-display); letter-spacing: 0.01em; overflow-wrap: anywhere; }
.obj-main p { color: var(--muted); margin-top: 0.25rem; font-size: 16px; }
.obj-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 0.1rem; font: 400 12.5px var(--f-mono); color: var(--muted); letter-spacing: 0.04em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.obj-meta b { color: var(--ink); font-weight: 400; }
.panel { padding: 0.25rem 0 1.75rem calc(3.6rem + 1.5rem); display: flex; flex-direction: column; gap: 1.4rem; }
.pgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1.5rem 2.5rem; }
.pl { font: 500 11px var(--f-body); letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); margin-bottom: 0.55rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; padding: 0; list-style: none; }
.tags li { font: 400 12.5px var(--f-mono); border: 1px solid var(--rule); padding: 0.1rem 0.6rem; color: var(--muted); }
.kv { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 0.35rem 1.5rem; font-size: 15.5px; }
.kv dt { font: 400 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding-top: 0.2rem; }
.kv dd { margin: 0; font-variant-numeric: tabular-nums; }
.panel .note { color: var(--muted); font-size: 15.5px; max-width: 44rem; }
.panel .btn { align-self: flex-start; }

/* record */
.two { display: grid; grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); gap: 2.5rem 3rem; }
.hon { margin: 0; display: flex; flex-direction: column; gap: 0.9rem; }
.hon dt { font: 400 1.35rem/1.2 var(--f-display); }
.hon dd { margin: 0.1rem 0 0; color: var(--muted); font-size: 16px; }
.fig { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.fig div { border-top: 1px solid var(--gold); padding-top: 0.6rem; }
.fig b { display: block; font: 400 clamp(2.2rem, 6vw, 3.4rem)/1 var(--f-display); font-variant-numeric: tabular-nums; }
.fig span { font: 400 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.fig-link { margin-top: 1.25rem; font-size: 15px; }

/* contact */
.contact { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 2rem clamp(2rem, 6vw, 5rem); align-items: start; }
.contact h3 { font: 400 clamp(1.8rem, 5vw, 2.8rem)/1.1 var(--f-display); margin-bottom: 0.75rem; text-wrap: balance; }
.mail-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.7rem 1.25rem; margin-block: 1.25rem 1rem; }
.mail-row code { font: 400 clamp(1.05rem, 3.4vw, 1.5rem)/1.3 var(--f-mono); overflow-wrap: anywhere; user-select: all; }
.copied { font: 400 12px var(--f-mono); color: var(--gold); }
.elsewhere { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 0.75rem 1.5rem; border-top: 1px solid var(--gold); padding-top: 1rem; font-size: 16px; }
.elsewhere dt { font: 400 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding-top: 0.3rem; }
.elsewhere dd { margin: 0; overflow-wrap: anywhere; }

.foot { margin-top: clamp(3.5rem, 8vw, 6rem); padding-block: 1.25rem 2.5rem; border-top: 1px solid var(--rule); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem; font: 400 12px var(--f-mono); letter-spacing: 0.1em; color: var(--muted); text-transform: uppercase; }
.foot a { color: var(--muted); text-decoration-color: var(--rule); }
.foot a:hover { color: var(--gold); }

@media (max-width: 860px) {
  .about, .contact { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 760px) {
  #menu-btn { display: grid; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--rule); padding: 0.4rem clamp(1rem, 5vw, 3rem) 1rem; }
  .nav.open { display: flex; }
  .nav a { padding-block: 0.85rem; border-bottom: 1px solid var(--rule); font-size: 13px; }
}
@media (max-width: 640px) {
  .g ul { columns: 1; }
  .brow { grid-template-columns: minmax(0, 1fr) 3rem; grid-template-areas: "l l" "t v"; row-gap: 0.15rem; padding-block: 0.35rem; }
  .axis { grid-template-areas: "t ."; }
  .axis .axis-cap { display: none; }
  .obj > summary { grid-template-columns: 3.2rem minmax(0, 1fr) 1.6rem; gap: 0.5rem 1rem; }
  .orb { width: 3.2rem; }
  .obj-meta { grid-column: 2 / span 2; grid-row: 2; flex-direction: row; flex-wrap: wrap; gap: 0.1rem 1.25rem; align-items: baseline; }
  .panel { padding-left: 0; }
}

/* page-wide rings sit behind all content */
#rings { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.hero, main, .foot { position: relative; z-index: 1; }

/* scroll reveal; the script adds .rvjs only when motion is allowed */
html.rvjs .rv { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1); }
html.rvjs .rv.up { transform: translateY(-14px); }
html.rvjs .rv.in { opacity: 1; transform: none; transition-delay: calc(var(--i, 0) * 70ms); }
html.rvjs .rv.now { transition: none; }

/* project filters */
.filters { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.6rem; margin-bottom: 2rem; }
.flabel { font: 400 11px var(--f-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-right: 0.4rem; }
.fchip { font: 400 12.5px var(--f-mono); letter-spacing: 0.04em; color: var(--ink); background: transparent; border: 1px solid var(--rule); padding: 0.3rem 0.8rem; cursor: pointer; border-radius: 0; display: inline-flex; gap: 0.5rem; align-items: baseline; }
.fchip i { font-style: normal; color: var(--muted); font-variant-numeric: tabular-nums; }
.fchip:hover { border-color: var(--gold); }
.fchip[aria-pressed="true"] { background: var(--gold); border-color: var(--gold); color: var(--bg); }
.fchip[aria-pressed="true"] i { color: var(--bg); }
.fcount { margin-left: auto; font: 400 12px var(--f-mono); color: var(--muted); letter-spacing: 0.04em; }
.brow { transition: opacity 0.3s ease; }
.brow.dim { opacity: 0.25; }
.objs { border-bottom: 1px solid var(--rule); }
.obj:last-child { border-bottom: 0; }
.flash { animation: flash 0.45s ease; }
@keyframes flash { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (max-width: 640px) { .fcount { margin-left: 0; width: 100%; } }
@media (prefers-reduced-motion: reduce) { .flash { animation: none; } .brow { transition: none; } }

/* hero sky fades out at the bottom instead of ending on a hard edge */
#sky { -webkit-mask-image: linear-gradient(to bottom, #000 70%, transparent 100%); mask-image: linear-gradient(to bottom, #000 70%, transparent 100%); }
.g.one ul { columns: 1; }
.foot { border-top: 0; background-image: linear-gradient(var(--rule), var(--rule)); background-repeat: no-repeat; background-position: center top; background-size: calc(100% - 2 * clamp(1rem, 5vw, 3rem)) 1px; }
@media (max-width: 640px) { .obj-name { font-size: 1.3rem; } }