:root {
  --paper: #f3eee3;
  --ink: #1c1a16;
  --muted: #7a7366;
  --line: #d8d0bf;
  --accent: #c2410c;   /* vermilion */
  --go: #0e8aa5;       /* gopher cyan */
  --code-bg: #ebe4d4;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
:root[data-theme="dark"] {
  --paper: #14130f;
  --ink: #ece6d6;
  --muted: #8d8678;
  --line: #2c2a23;
  --accent: #f08a4b;
  --go: #4cc3dc;
  --code-bg: #1b1a15;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14130f; --ink: #ece6d6; --muted: #8d8678; --line: #2c2a23;
    --accent: #f08a4b; --go: #4cc3dc; --code-bg: #1b1a15;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
/* subtle paper grain */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; opacity: .05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence baseFrequency='.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
a { color: inherit; text-decoration-color: var(--accent); text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
::selection { background: var(--accent); color: var(--paper); }
.mono { font-family: var(--mono); font-size: .8rem; letter-spacing: .02em; }

.top, main, footer { max-width: 1280px; margin: 0 auto; padding-left: clamp(24px, 5vw, 72px); padding-right: clamp(24px, 5vw, 72px); }
.top {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; padding-bottom: 12px;
  font-family: var(--mono); font-size: .85rem;
}
.top nav { display: flex; gap: 22px; align-items: center; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover { color: var(--ink); }
.mark { text-decoration: none; font-weight: 500; }
.cursor { color: var(--accent); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
#theme { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 50%; width: 30px; height: 30px; cursor: pointer; font-size: 1rem; }
#theme:hover { border-color: var(--accent); }

/* hero */
.hero { padding: 12vh 0 9vh; }
.eyebrow { color: var(--muted); display: flex; align-items: center; gap: 10px; margin: 0 0 28px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #3fb950; box-shadow: 0 0 0 0 rgba(63,185,80,.6); animation: pulse 2.4s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 9px rgba(63,185,80,0); } 100% { box-shadow: 0 0 0 0 rgba(63,185,80,0); } }
h1 {
  font-weight: 300; font-size: clamp(2.4rem, 7.5vw, 4.4rem); line-height: 1.05;
  letter-spacing: -.025em; margin: 0 0 28px; font-variation-settings: "opsz" 144;
}
h1 em { font-style: italic; color: var(--accent); }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 34em; margin: 0 0 28px; }
.meta { color: var(--muted); }

/* sections */
section { padding: 56px 0; border-top: 1px solid var(--line); }
h2 { font-weight: 400; font-size: 1.7rem; letter-spacing: -.01em; margin: 0 0 28px; font-style: italic; }
h2 .num { font-style: normal; color: var(--accent); margin-right: 12px; vertical-align: middle; }
.sub, .sub-inline { color: var(--muted); font-size: .95rem; font-style: normal; }
.sub-inline { font-family: var(--mono); font-size: .75rem; margin-left: 8px; }
.sub { margin: -14px 0 28px; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* about */
.about-grid { display: grid; grid-template-columns: 1fr; gap: 28px; }
@media (min-width: 720px) { .about-grid { grid-template-columns: 1fr 1fr; align-items: start; } }
.prose p { margin: 0 0 1em; }
.code {
  margin: 0; padding: 18px 20px; background: var(--code-bg); border: 1px solid var(--line);
  border-left: 3px solid var(--go); border-radius: 3px; overflow-x: auto;
  font: 400 .76rem/1.7 var(--mono);
}
.code .c { color: var(--muted); font-style: italic; }
.code .k { color: var(--accent); }
.code .f { color: var(--go); }
.code .s { color: #6a8a2b; }
:root[data-theme="dark"] .code .s { color: #a5c261; }

.stack { margin-top: 40px; display: grid; gap: 14px; }
.stack .row { display: grid; grid-template-columns: 120px 1fr; gap: 12px; align-items: baseline; }
.stack .g { color: var(--muted); }
.stack .items span { display: inline-block; margin: 0 14px 4px 0; }
.stack .items span::before { content: "· "; color: var(--accent); }
@media (max-width: 520px) { .stack .row { grid-template-columns: 1fr; gap: 2px; } }

/* otel pipeline */
.tabs { display: flex; gap: 8px; margin-bottom: 22px; }
.tabs button {
  font: inherit; background: none; color: var(--muted); border: 1px solid var(--line);
  padding: 6px 14px; border-radius: 20px; cursor: pointer; transition: all .2s;
}
.tabs button:hover { color: var(--ink); }
.tabs button.on { color: var(--paper); background: var(--c); border-color: var(--c); }
.pipe { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; padding: 8px 0 4px; }
.flow { position: absolute; left: 0; right: 0; top: 50%; height: 0; border-top: 1px dashed var(--line); pointer-events: none; }
.flow i {
  position: absolute; top: -4px; left: 0; width: 8px; height: 8px; border-radius: 50%;
  background: var(--c); box-shadow: 0 0 10px var(--c);
}
.stage { position: relative; z-index: 1; background: var(--paper); border: 1px solid var(--line); border-top: 2px solid var(--c); border-radius: 3px; padding: 12px 12px 6px; transition: border-color .3s; }
.stage h4 { margin: 0 0 8px; font-weight: 400; color: var(--muted); text-transform: uppercase; font-size: .66rem; letter-spacing: .12em; }
.stage ul { list-style: none; margin: 0; padding: 0; }
.stage li { font: 400 .74rem/1.4 var(--mono); padding: 3px 0; animation: fadein .5s both; }
.stage li::before { content: "▸ "; color: var(--c); }
@keyframes fadein { from { opacity: 0; transform: translateX(-6px); } }
.note { font-style: italic; color: var(--muted); margin: 18px 0; }
.note::before { content: "“"; color: var(--c); }
.note::after { content: "”"; color: var(--c); }
.code.yaml { border-left-color: var(--c); min-height: 120px; }
.code .y { color: var(--go); }
@media (max-width: 640px) { .pipe { grid-template-columns: 1fr 1fr; } .flow { display: none; } }

/* waterfall */
.waterfall { display: grid; gap: 6px; }
.span-row { display: grid; grid-template-columns: 150px 1fr; gap: 14px; align-items: center; cursor: pointer; }
.span-label { font: 500 .72rem var(--mono); color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.span-track { position: relative; height: 30px; border-left: 1px solid var(--line); background: repeating-linear-gradient(90deg, transparent 0 calc(20% - 1px), var(--line) calc(20% - 1px) 20%); }
.span-bar {
  position: absolute; top: 4px; bottom: 4px; left: var(--l); width: 0;
  background: var(--go); opacity: .85; border-radius: 2px;
  font: 400 .68rem/22px var(--mono); color: var(--paper); padding: 0 8px; white-space: nowrap; overflow: hidden;
  transition: width 1.1s cubic-bezier(.2,.7,.2,1) var(--d), background .2s;
}
.in .span-bar { width: var(--w); }
.span-row:nth-child(odd) .span-bar { background: var(--go); }
.span-row:nth-child(even) .span-bar { background: var(--accent); }
.span-row:hover .span-bar, .span-row.active .span-bar { opacity: 1; filter: brightness(1.12); }
.span-row.active .span-label { color: var(--ink); }
.axis { display: grid; grid-template-columns: 150px 1fr; gap: 14px; margin-top: 6px; color: var(--muted); font-size: .68rem; }
.axis div { display: flex; justify-content: space-between; }
.attrs { margin: 28px 0 0; padding: 16px 18px; background: var(--code-bg); border: 1px solid var(--line); border-radius: 3px; min-height: 120px; }
.attrs .head { color: var(--accent); margin-bottom: 8px; display: block; }
.attrs dt { color: var(--muted); display: inline; }
.attrs dt::after { content: " = "; }
.attrs dd { display: inline; margin: 0; color: var(--ink); }
.attrs .line { display: block; margin: 3px 0; }
@media (max-width: 560px) { .span-row, .axis { grid-template-columns: 1fr; gap: 3px; } .axis { display: none; } }

/* posts */
.posts { list-style: none; margin: 0; padding: 0; }
.posts li { border-bottom: 1px solid var(--line); }
.posts li.muted { color: var(--muted); border: 0; }
.posts a.post { display: grid; grid-template-columns: 96px 1fr; gap: 18px; padding: 20px 0; text-decoration: none; transition: padding .25s; }
.posts a.post:hover { padding-left: 10px; }
.posts .date { color: var(--muted); padding-top: 6px; }
.posts h3 { margin: 0 0 4px; font-weight: 500; font-size: 1.2rem; line-height: 1.3; }
.posts a.post:hover h3 { color: var(--accent); }
.posts p { margin: 0; color: var(--muted); font-size: .95rem; line-height: 1.5; }
.more { margin-top: 24px; font-style: italic; }
@media (max-width: 560px) { .posts a.post { grid-template-columns: 1fr; gap: 2px; } }

/* contact */
.big { font-size: clamp(1.5rem, 5vw, 2.4rem); font-weight: 300; margin: 0 0 18px; word-break: break-word; }
.links a { text-decoration: none; color: var(--muted); }
.links a:hover { color: var(--accent); }

footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding-top: 28px; padding-bottom: 48px; color: var(--muted); border-top: 1px solid var(--line); }
.traceid { cursor: help; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  .in .span-bar, .span-bar { width: var(--w); }
}

/* projects */
.projects { display: grid; gap: 28px; }
.project { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.project:last-child { border: 0; }
.project .kind { color: var(--accent); }
.project h3 { margin: 4px 0 8px; font-weight: 500; font-size: 1.45rem; }
.project h3 a { text-decoration: none; }
.project p { margin: 0 0 10px; color: var(--muted); }
.project ul { margin: 0 0 12px; padding: 0; list-style: none; font-size: .95rem; }
.project li::before { content: "↳ "; color: var(--go); }
.tags span { display: inline-block; font: 400 .68rem var(--mono); border: 1px solid var(--line); border-radius: 20px; padding: 2px 10px; margin: 0 6px 6px 0; color: var(--muted); }
.bench { font-weight: 400; color: var(--muted); margin: 36px 0 12px; }
.repos { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
.repos li { border-bottom: 1px dotted var(--line); padding: 8px 0; }
.repos a { text-decoration: none; font: 500 .85rem var(--mono); }
.repos small { display: block; color: var(--muted); font: 400 .7rem var(--mono); }
@media (max-width: 560px) { .repos { grid-template-columns: 1fr; } }

/* span events */
.attrs .ev { display: block; color: var(--muted); margin: 3px 0 3px 4px; }
.attrs .ev b { color: var(--go); font-weight: 400; }

/* command palette */
#kbd { background: none; border: 1px solid var(--line); color: var(--muted); border-radius: 4px; padding: 3px 8px; cursor: pointer; font-size: .72rem; }
#kbd:hover { color: var(--ink); border-color: var(--accent); }
#palette { position: fixed; inset: 0; z-index: 50; background: rgba(0,0,0,.45); display: flex; justify-content: center; align-items: flex-start; padding-top: 16vh; }
#palette[hidden] { display: none; }
.pal-box { width: min(520px, 92vw); background: var(--paper); border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 20px 60px rgba(0,0,0,.35); overflow: hidden; }
#pal-input { width: 100%; padding: 14px 16px; background: none; border: 0; border-bottom: 1px solid var(--line); color: var(--ink); outline: none; font-size: .9rem; }
#pal-list { list-style: none; margin: 0; padding: 6px; max-height: 50vh; overflow: auto; }
#pal-list li { font: 400 .82rem var(--mono); padding: 8px 12px; border-radius: 4px; cursor: pointer; display: flex; justify-content: space-between; }
#pal-list li span { color: var(--muted); }
#pal-list li.sel { background: var(--code-bg); color: var(--accent); }

/* ── wide-screen layout ───────────────────────────────── */
.hero { padding: 14vh 0 11vh; }
h1 { font-size: clamp(2.6rem, 8vw, 6.4rem); max-width: 14em; }
.lede { font-size: 1.35rem; max-width: 38em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }
section { padding: 72px 0; }
.prose { max-width: 36em; }

@media (min-width: 1000px) {
  .about-grid { grid-template-columns: 1fr 1.1fr; gap: 64px; }
  .code { font-size: .85rem; }
  .stack { grid-template-columns: 1fr 1fr; gap: 18px 56px; }
  .projects { grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); }
  .project { padding: 26px 24px; border-bottom: 0; border-right: 1px solid var(--line); display: flex; flex-direction: column; }
  .project:last-child { border-right: 0; }
  .project .tags { margin-top: auto; }
  .repos { grid-template-columns: repeat(4, 1fr); gap: 0 32px; }
  .posts { display: grid; grid-template-columns: 1fr 1fr; gap: 0 56px; }
  .posts li.muted { grid-column: 1 / -1; }
  .posts a.post { grid-template-columns: 1fr; gap: 4px; }
  .posts .date { padding-top: 0; }
  .span-row, .axis { grid-template-columns: 220px 1fr; }
  .span-track { height: 36px; }
  .span-bar { font-size: .75rem; line-height: 28px; }
  .attrs { font-size: .85rem; columns: 2; column-gap: 48px; }
  .attrs .head { column-span: all; }
  .stage { padding: 18px 18px 10px; }
  .stage li { font-size: .82rem; }
  .code.yaml { font-size: .88rem; }
}
@media (min-width: 700px) and (max-width: 999px) {
  .projects { grid-template-columns: 1fr 1fr; gap: 28px; }
  .repos { grid-template-columns: repeat(3, 1fr); }
}

/* hero log stream */
.hero { display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center; }
.termlog { background: var(--code-bg); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; font-size: .72rem; line-height: 1.8; display: none; }
.tl-head { padding: 8px 12px; border-bottom: 1px solid var(--line); color: var(--muted); display: flex; align-items: center; gap: 6px; }
.tl-head i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); display: inline-block; }
.tl-head i:first-child { background: var(--accent); }
#tl-body { padding: 12px 14px; height: 250px; overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; white-space: nowrap; }
#tl-body div { animation: fadein .4s both; overflow: hidden; text-overflow: ellipsis; }
#tl-body .t { color: var(--muted); } #tl-body .INFO { color: var(--go); } #tl-body .WARN { color: var(--accent); } #tl-body .DEBUG { color: var(--muted); }
#tl-body .tid { color: var(--muted); opacity: .7; }
@media (min-width: 1000px) { .hero { grid-template-columns: 1.35fr 1fr; } .termlog { display: block; } h1 { font-size: clamp(2.6rem, 5.6vw, 5.2rem); } }

/* upstream */
.upstream-h span { color: var(--muted); opacity: .8; }
.upstream { list-style: none; margin: 0; padding: 0; }
.upstream li { display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; padding: 14px 0; border-bottom: 1px dotted var(--line); }
.upstream a { text-decoration: none; }
.upstream .t { font-size: 1.05rem; }
.upstream .r { display: block; color: var(--muted); font: 400 .72rem var(--mono); }
.badge { font: 500 .68rem var(--mono); padding: 3px 10px; border-radius: 20px; border: 1px solid; }
.badge.open { color: #3fb950; } .badge.merged { color: #a371f7; } .badge.closed { color: var(--muted); }
.upstream li:hover .t { color: var(--accent); }

/* featured article */
.featured { display: block; text-decoration: none; padding: 24px 26px; margin-bottom: 28px; border: 1px solid var(--line); border-left: 3px solid var(--accent); background: var(--code-bg); border-radius: 3px; transition: transform .25s; }
.featured:hover { transform: translateX(6px); }
.featured .f-tag { color: var(--accent); }
.featured h3 { margin: 6px 0 8px; font-weight: 500; font-size: clamp(1.25rem, 2.4vw, 1.7rem); line-height: 1.25; }
.featured p { margin: 0 0 10px; color: var(--muted); }
.featured .f-go { color: var(--go); }

/* ascii portrait */
.portrait { margin: 0; grid-column: 1 / -1; display: flex; flex-direction: column; align-items: flex-start; }
.ascii { margin: 0; font: 400 6.4px/6.4px var(--mono); letter-spacing: 0; color: var(--ink); white-space: pre; overflow: hidden; max-width: 100%; user-select: none; }
.ascii .g { color: var(--go); }
.ascii .a { color: var(--accent); }
:root[data-theme="dark"] .ascii { opacity: .92; }
.portrait figcaption { margin-top: 10px; color: var(--muted); }
.portrait .pr { color: var(--accent); }
.portrait b { color: var(--ink); font-weight: 500; }
@media (min-width: 1000px) {
  .about-grid { grid-template-columns: auto 1fr 1fr; gap: 48px; }
  .portrait { grid-column: auto; grid-row: 1 / span 2; }
  .ascii { font-size: 9.4px; line-height: 9.4px; }
  .prose { grid-column: 2 / 4; }
  .code { grid-column: 2 / 4; }
}
@media (min-width: 700px) and (max-width: 999px) { .about-grid { grid-template-columns: auto 1fr; } .portrait { grid-column: auto; grid-row: 1 / span 2; } }

/* contact */
.contact-grid { display: grid; gap: 48px; }
@media (min-width: 900px) { .contact-grid { grid-template-columns: 1.2fr 1fr; gap: 72px; align-items: start; } }
.form { display: grid; gap: 16px; }
.form label { display: grid; gap: 6px; color: var(--muted); }
.form input, .form select, .form textarea {
  font: 400 1rem var(--serif); color: var(--ink); background: transparent;
  border: 0; border-bottom: 1px solid var(--line); border-radius: 0; padding: 8px 0; outline: none; transition: border-color .2s;
  width: 100%;
}
.form textarea { border: 1px solid var(--line); padding: 10px 12px; resize: vertical; border-radius: 3px; }
.form select option { background: var(--paper); color: var(--ink); }
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--accent); }
.form input.bad, .form textarea.bad { border-color: #d1242f; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-foot { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.send { font-size: .85rem; background: var(--ink); color: var(--paper); border: 1px solid var(--ink); padding: 11px 22px; border-radius: 3px; cursor: pointer; transition: all .2s; }
.send:hover { background: var(--accent); border-color: var(--accent); }
.send:disabled { opacity: .5; cursor: wait; }
.status { color: var(--muted); }
.status.ok { color: #3fb950; } .status.err { color: #d1242f; }
.side .big { margin-top: 0; }
.coffee { display: flex; gap: 18px; align-items: center; margin-top: 32px; padding: 20px 22px; border: 1px dashed var(--accent); border-radius: 4px; text-decoration: none; transition: transform .25s, background .25s; }
.coffee[hidden] { display: none; }
.coffee:hover { transform: translateY(-3px) rotate(-.4deg); background: var(--code-bg); }
.coffee b { display: block; font-weight: 500; font-size: 1.15rem; }
.coffee small { color: var(--muted); font-size: .88rem; line-height: 1.4; display: block; margin-top: 2px; }
.cup { margin: 0; font-size: .85rem; line-height: 1.15; color: var(--accent); }
.cup .steam { color: var(--muted); display: inline-block; animation: steam 2.4s ease-in-out infinite; }
@keyframes steam { 0%,100% { opacity: .25; transform: translateY(2px); } 50% { opacity: .9; transform: translateY(-3px); } }

/* ── mobile & small-screen fixes ──────────────────────── */
html, body { overflow-x: hidden; }
.hero { padding: clamp(48px, 12vh, 140px) 0 clamp(48px, 9vh, 110px); }
@media (max-width: 720px) {
  body { font-size: 17px; }
  .top { flex-direction: column; align-items: flex-start; gap: 10px; padding-top: 18px; }
  .top nav { width: 100%; gap: 18px; overflow-x: auto; white-space: nowrap; padding-bottom: 6px; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .top nav::-webkit-scrollbar { display: none; }
  #kbd { display: none; }
  #theme { flex: none; margin-left: auto; }
  section { padding: 44px 0; }
  h1 { font-size: clamp(2.3rem, 11vw, 3.2rem); }
  .lede { font-size: 1.1rem; }
  h2 { font-size: 1.5rem; }
  .code, .code.yaml { font-size: .7rem; padding: 14px; }
  .portrait { align-items: center; }
  .ascii { font-size: min(1.55vw * 2.9, 6.2px); line-height: 1; }
  .pipe { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stage { padding: 10px; }
  .stage li { font-size: .7rem; word-break: break-word; }
  .tabs { flex-wrap: wrap; }
  .project h3 { font-size: 1.25rem; }
  .upstream li { grid-template-columns: auto 1fr; }
  .upstream li > a:last-child { display: none; }
  .featured { padding: 18px; }
  .span-label { white-space: normal; }
  .span-bar { font-size: .62rem; }
  .attrs { font-size: .72rem; overflow-wrap: anywhere; }
  .form-foot .send { width: 100%; }
  .coffee { flex-direction: column; align-items: flex-start; }
  .big { font-size: clamp(1.05rem, 5.6vw, 1.5rem); }
  footer { flex-direction: column; }
  .traceid { overflow-wrap: anywhere; }
  .stack .items span { margin-right: 10px; }
}
@media (max-width: 720px) {
  .top { position: relative; }
  #theme { position: absolute; top: 16px; right: clamp(24px, 5vw, 72px); margin: 0; }
  .span-bar { font-size: 0; padding: 0; }          /* label already names the span */
  .span-row { gap: 4px; }
  .span-label { font-size: .7rem; }
}

/* ── mirrored portrait as hero backdrop ───────────────── */
.about-grid .portrait { display: none; }
.hero { position: relative; isolation: isolate; }
.hero-art {
  position: absolute; z-index: -1; top: 0; right: 0; bottom: 0; width: min(100%, 520px);
  background: url("assets/portrait.jpg") center top / cover no-repeat;
  transform: scaleX(-1);                 /* the mirror */
  opacity: .2;
  -webkit-mask-image: linear-gradient(to bottom, #000 55%, transparent 100%), radial-gradient(ellipse at 50% 40%, #000 35%, transparent 75%);
  -webkit-mask-composite: source-in;
  mask-image: linear-gradient(to bottom, #000 55%, transparent 100%), radial-gradient(ellipse at 50% 40%, #000 35%, transparent 75%);
  mask-composite: intersect;
  pointer-events: none;
}
:root[data-theme="dark"] .hero-art { opacity: .16; filter: brightness(.85) saturate(.9); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero-art { opacity: .16; filter: brightness(.85) saturate(.9); } }
@media (min-width: 1000px) {
  .hero-art { opacity: .95; width: min(46%, 560px); }
  :root[data-theme="dark"] .hero-art { opacity: .75; }
  .termlog { align-self: end; background: color-mix(in srgb, var(--paper) 82%, transparent); backdrop-filter: blur(8px); position: relative; z-index: 1; margin-bottom: 8px; }
  #tl-body { height: 190px; }
  .hero { min-height: 640px; }
}

/* refinements: whole head visible, about grid restored */
.hero-art { background-size: auto 100%; background-position: right top; width: min(100%, 520px); }
@media (min-width: 1000px) {
  .hero-art { width: min(44%, 540px); }
  #tl-body { height: 128px; padding: 8px 14px; }
  .termlog { margin-bottom: 0; }
  .hero { min-height: 700px; }
  .about-grid { grid-template-columns: 1fr 1fr; gap: 64px; }
  .about-grid .prose, .about-grid .code { grid-column: auto; }
}
@media (min-width: 700px) and (max-width: 999px) { .about-grid { grid-template-columns: 1fr; } }
#tl-body div { flex: none; line-height: 20px; }
@media (max-width: 999px) { .hero-art { opacity: .13; width: min(100%, 440px); } }

/* self-trace: "you're already in my trace" */
#tr-pill { position: fixed; left: 16px; bottom: 16px; z-index: 40; display: flex; align-items: center; gap: 8px; font-size: .72rem; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 7px 14px 7px 12px; cursor: pointer; box-shadow: 0 4px 18px rgba(0,0,0,.12); transition: border-color .2s, transform .2s; }
#tr-pill:hover { border-color: var(--accent); transform: translateY(-2px); }
#tr-pill i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: pulse2 1.6s infinite; }
@keyframes pulse2 { 50% { opacity: .25; } }
#tr-drawer { position: fixed; left: 16px; bottom: 62px; z-index: 41; width: min(760px, calc(100vw - 32px)); max-height: 72vh; display: flex; flex-direction: column; background: var(--paper); border: 1px solid var(--line); border-top: 2px solid var(--go); border-radius: 6px; box-shadow: 0 24px 70px rgba(0,0,0,.35); }
#tr-drawer[hidden] { display: none; }
#tr-drawer header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); }
#tr-drawer header i { color: var(--muted); font-style: normal; }
#tr-x { background: none; border: 0; color: var(--muted); font-size: 1.4rem; line-height: 1; cursor: pointer; }
#tr-x:hover { color: var(--accent); }
.tr-id { margin: 0; padding: 8px 16px; color: var(--muted); overflow-wrap: anywhere; font-size: .72rem; }
.tr-rows { overflow-y: auto; padding: 4px 16px 10px; }
.tr-row { display: grid; grid-template-columns: 170px 1fr 52px; gap: 10px; align-items: center; padding: 2px 0; font: 400 .7rem/1.5 var(--mono); }
.tr-n { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--ink); }
.tr-n.c { padding-left: 10px; color: var(--muted); }
.tr-t { position: relative; height: 12px; background: repeating-linear-gradient(90deg, transparent 0 calc(25% - 1px), var(--line) calc(25% - 1px) 25%); }
.tr-t b { position: absolute; top: 2px; bottom: 2px; background: var(--go); border-radius: 1px; min-width: 2px; }
.tr-row.k-root .tr-t b { background: var(--ink); opacity: .7; }
.tr-row.k-view .tr-t b { background: var(--accent); opacity: .8; }
.tr-row.k-click .tr-t b { background: #a371f7; }
.tr-row.k-vital .tr-t b { background: #3fb950; }
.tr-row.k-http .tr-t b { background: #d29922; }
.tr-row.k-res .tr-t b { background: var(--go); opacity: .55; }
.tr-d { text-align: right; color: var(--muted); }
#tr-drawer footer { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; padding: 10px 16px; border-top: 1px solid var(--line); font-size: .72rem; color: var(--muted); }
#tr-drawer footer button { font: inherit; color: var(--ink); background: none; border: 1px solid var(--line); border-radius: 3px; padding: 5px 10px; cursor: pointer; }
#tr-drawer footer button:hover { border-color: var(--accent); color: var(--accent); }
footer a.traceid { text-decoration: none; }
footer a.traceid:hover { color: var(--accent); }
@media (max-width: 720px) {
  #tr-pill { left: 12px; bottom: 12px; font-size: .68rem; }
  #tr-drawer { left: 8px; right: 8px; width: auto; bottom: 56px; max-height: 70vh; }
  .tr-row { grid-template-columns: 110px 1fr 44px; font-size: .64rem; }
}
#tr-drawer footer { max-width: none; margin: 0; padding: 10px 16px; justify-content: flex-start; }
@media (max-width: 720px) { #tr-drawer footer { flex-direction: row; } }

/* trace SLO chips + attach consent */
.tr-slo { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 16px 8px; font-size: .68rem; }
.tr-slo .chip { border: 1px solid var(--line); border-radius: 20px; padding: 3px 10px; color: var(--muted); }
.tr-slo .chip em { font-style: normal; opacity: .8; }
.tr-slo .chip.ok { color: #3fb950; border-color: color-mix(in srgb, #3fb950 45%, var(--line)); }
.tr-slo .chip.bad { color: #d1242f; border-color: #d1242f; }
.tr-id { white-space: normal; }
label.attach { display: flex; gap: 10px; align-items: flex-start; font-size: .7rem; line-height: 1.5; cursor: pointer; }
label.attach input { width: auto; margin-top: 3px; accent-color: var(--accent); }
label.attach a { color: var(--go); }

/* tail-sampling playground */
.sampler { margin-top: 44px; }
.lg { font-weight: 500; } .lg.ok { color: var(--go); } .lg.slow { color: #d29922; } .lg.err { color: var(--accent); }
.sp-ctl { display: flex; flex-wrap: wrap; gap: 14px 28px; margin: 14px 0; color: var(--muted); align-items: center; }
.sp-ctl label { display: flex; gap: 8px; align-items: center; cursor: pointer; }
.sp-ctl input[type=checkbox], .sp-ctl input[type=range] { accent-color: var(--accent); }
.sp-ctl b { color: var(--ink); font-weight: 500; min-width: 3ch; }
.sp-dots { display: flex; flex-wrap: wrap; gap: 5px; min-height: 66px; padding: 14px; border: 1px solid var(--line); border-radius: 3px; background: var(--code-bg); align-content: flex-start; }
.sp-dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--go); animation: pop .35s both; }
.sp-dots i.slow { background: #d29922; } .sp-dots i.err { background: var(--accent); border-radius: 2px; }
.sp-dots i.drop { opacity: .14; transform: scale(.7); }
@keyframes pop { from { transform: scale(0); } }
.sp-stats { display: flex; flex-wrap: wrap; gap: 6px 26px; margin: 12px 0; color: var(--muted); }
.sp-stats b { color: var(--ink); font-weight: 500; } .sp-stats b.bad { color: #d1242f; } .sp-stats em { font-style: normal; opacity: .8; }
#sp-yaml { min-height: 0; font-size: .74rem; border-left-color: var(--accent); }
#sp-yaml .c { color: var(--muted); font-style: italic; }



/* what-do-you-need matcher */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 22px; }
.chips button { font: 400 .98rem var(--serif); color: var(--ink); background: none; border: 1px solid var(--line); border-radius: 30px; padding: 9px 18px; cursor: pointer; transition: all .2s; }
.chips button:hover { border-color: var(--accent); color: var(--accent); }
.chips button.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.help-card { border: 1px solid var(--line); border-left: 3px solid var(--accent); background: var(--code-bg); border-radius: 3px; padding: 26px 28px; max-width: 880px; }
.help-card.pop { animation: fadein .45s both; }
.help-card .plain { font-size: 1.3rem; line-height: 1.45; margin: 0 0 20px; }
.help-card h4 { margin: 0 0 8px; font-weight: 400; color: var(--muted); text-transform: uppercase; font-size: .66rem; letter-spacing: .12em; }
.help-card ul { margin: 0 0 18px; padding: 0; list-style: none; }
.help-card li { padding: 3px 0; }
.help-card li::before { content: "✓ "; color: #3fb950; }
.proof { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-bottom: 22px; }
.proof a { color: var(--go); text-decoration: none; }
.proof a:hover { color: var(--accent); }
@media (max-width: 720px) { .chips button { font-size: .88rem; padding: 8px 14px; } .help-card { padding: 20px; } .help-card .plain { font-size: 1.12rem; } }