/* ---------- tokens ---------- */
:root {
  --bg: #0b0e14;
  --bg-2: #11151e;
  --bg-3: #171c28;
  --line: #242b3b;
  --text: #e6e9f0;
  --text-2: #a3abbe;
  --text-3: #6c7590;
  --accent: #39d2c0;
  --accent-2: #7aa2f7;
  --warn: #e0af68;
  --term-bg: #0d1117;
  --term-text: #d4d9e3;
  --prompt-user: #9ece6a;
  --prompt-path: #7aa2f7;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, .6);
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f8fb; --bg-2: #ffffff; --bg-3: #eef1f6; --line: #dde2ec;
    --text: #141824; --text-2: #4a5268; --text-3: #7c859c;
    --accent: #0f8f84; --accent-2: #3d63c9; --warn: #9a6b12;
    --term-bg: #fbfcfe; --term-text: #1f2433; --prompt-user: #3f7d1c; --prompt-path: #3d63c9;
    --shadow: 0 20px 50px -25px rgba(20, 30, 60, .25);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f7f8fb; --bg-2: #ffffff; --bg-3: #eef1f6; --line: #dde2ec;
  --text: #141824; --text-2: #4a5268; --text-3: #7c859c;
  --accent: #0f8f84; --accent-2: #3d63c9; --warn: #9a6b12;
  --term-bg: #fbfcfe; --term-text: #1f2433; --prompt-user: #3f7d1c; --prompt-path: #3d63c9;
  --shadow: 0 20px 50px -25px rgba(20, 30, 60, .25);
  color-scheme: light;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.65 var(--sans); min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-2); }
code, kbd, pre { font-family: var(--mono); font-size: .9em; }
code { background: var(--bg-3); border: 1px solid var(--line); border-radius: 5px; padding: .08em .35em; }
kbd { background: var(--bg-3); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; padding: .05em .4em; font-size: .8em; }
pre { background: var(--term-bg); border: 1px solid var(--line); border-radius: 10px; padding: 1rem; overflow-x: auto; line-height: 1.5; }
pre code { background: none; border: 0; padding: 0; }
img { max-width: 100%; height: auto; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--bg-2); padding: .5rem 1rem; z-index: 10; }
.muted { color: var(--text-3); }

/* ---------- nav ---------- */
.topnav {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 1rem;
  padding: .7rem max(16px, calc((100vw - 1060px) / 2)); background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.brand { font: 700 1rem var(--mono); color: var(--text); text-decoration: none; white-space: nowrap; }
.brand-mark { color: var(--accent); }
.topnav nav { display: flex; gap: .15rem; margin-left: auto; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.topnav nav::-webkit-scrollbar { display: none; }
.topnav nav a {
  color: var(--text-2); text-decoration: none; font-size: .9rem; font-weight: 500;
  padding: .4rem .7rem; border-radius: 8px; white-space: nowrap;
}
.topnav nav a:hover { color: var(--text); background: var(--bg-3); }
.topnav nav a[aria-current="page"] { color: var(--text); background: var(--bg-3); }
.theme-toggle {
  flex-shrink: 0; width: 36px; height: 36px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--bg-2); color: var(--text-2); cursor: pointer; font-size: 1rem;
}
.t-light { display: none; }
:root[data-theme="light"] .t-dark { display: none; }
:root[data-theme="light"] .t-light { display: inline; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .t-dark { display: none; }
  :root:not([data-theme]) .t-light { display: inline; }
}

/* ---------- layout ---------- */
main { flex: 1; width: 100%; max-width: 1060px; margin: 0 auto; padding: 2.5rem 16px 4rem; }
main.page { max-width: 780px; }
.foot {
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between;
  padding: 1.5rem max(16px, calc((100vw - 1060px) / 2)); border-top: 1px solid var(--line);
  color: var(--text-3); font-size: .85rem;
}
.foot a { color: var(--text-2); }
.foot-links { display: flex; gap: 1rem; }

/* ---------- home ---------- */
.hero h1 { font-size: clamp(1.7rem, 4.5vw, 2.8rem); line-height: 1.15; letter-spacing: -.03em; margin: 0 0 .75rem; font-weight: 800; }
.hero h1 .muted { display: block; font-weight: 600; }
.hero .sub { color: var(--text-2); font-size: 1.05rem; max-width: 640px; margin: 0 0 1.75rem; }

.term {
  background: var(--term-bg); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow); overflow: hidden;
}
.term-bar { display: flex; align-items: center; gap: 7px; padding: .65rem .9rem; border-bottom: 1px solid var(--line); background: var(--bg-3); }
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.term-title { margin-left: .5rem; font: 500 .8rem var(--mono); color: var(--text-3); }
.term-screen {
  font: 14px/1.6 var(--mono); color: var(--term-text); padding: 1rem 1.1rem 1.1rem;
  min-height: 260px; max-height: min(62vh, 540px); overflow-y: auto; cursor: text; outline: none;
}
.term-out > div { white-space: pre-wrap; word-break: break-word; }
.term-out .echo { color: var(--text); margin-top: .6rem; }
.term-out .echo:first-child { margin-top: 0; }
.term-out .dim { color: var(--text-3); }
.term-out .ok { color: var(--accent); }
.term-out .warn { color: var(--warn); }
.term-out .h { color: var(--text); font-weight: 700; }
.term-out a { color: var(--accent); }
.term-out .cmd {
  color: var(--accent-2); cursor: pointer; text-decoration: underline dotted; text-underline-offset: 3px;
  background: none; border: 0; padding: 0; font: inherit;
}
.term-out .cmd:hover { color: var(--accent); }
.term-out .grid { display: grid; grid-template-columns: max-content 1fr; gap: .1rem 1.5rem; }
.term-out .bar { font-family: var(--mono); letter-spacing: -1px; }
.term-out .article { white-space: normal; font-family: var(--sans); font-size: .95rem; border-left: 2px solid var(--line); padding-left: 1rem; margin: .5rem 0; }
.term-out .article pre { font-size: .85rem; }
.term-out .hint-box { border: 1px dashed var(--line); border-radius: 8px; padding: .5rem .8rem; margin: .6rem 0; color: var(--text-2); white-space: normal; }
.p-user { color: var(--prompt-user); } .p-path { color: var(--prompt-path); }
.term-line { display: flex; align-items: baseline; gap: .6rem; margin-top: .6rem; }
.prompt { flex-shrink: 0; color: var(--text-2); }
#term-input {
  flex: 1; min-width: 0; background: transparent; border: 0; outline: none; color: var(--text);
  font: inherit; font-size: 16px; caret-color: var(--accent); padding: 0;
}
#term-input::placeholder { color: var(--text-3); }

.chips { display: flex; flex-wrap: wrap; gap: .45rem; align-items: center; margin: 1rem 0 .75rem; }
.chips-label { color: var(--text-3); font-size: .85rem; margin-right: .2rem; }
.chips button {
  font: 500 .85rem var(--mono); color: var(--text); background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 999px; padding: .4rem .85rem; cursor: pointer; transition: border-color .12s, color .12s, transform .12s;
}
.chips button::before { content: "$ "; color: var(--text-3); }
.chips button:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.chips button:disabled { opacity: .5; cursor: wait; }

.howto { background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; padding: .2rem 1rem; }
.howto summary { cursor: pointer; padding: .6rem 0; font-weight: 600; color: var(--text-2); }
.howto[open] summary { color: var(--text); }
.howto ul { margin: 0 0 .9rem; padding-left: 1.2rem; color: var(--text-2); font-size: .95rem; }
.howto li { margin: .3rem 0; }
.cmdlike { color: var(--accent-2); text-decoration: underline dotted; text-underline-offset: 3px; }

.section-h { font-size: 1.1rem; color: var(--text-2); margin: 3rem 0 1rem; font-weight: 600; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .9rem; }
.card {
  display: flex; flex-direction: column; gap: .35rem; padding: 1.2rem; border-radius: 12px;
  background: var(--bg-2); border: 1px solid var(--line); color: var(--text); text-decoration: none;
  transition: border-color .12s, transform .12s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); color: var(--text); }
.card strong { font-size: 1.1rem; }
.card span:last-child { color: var(--text-2); font-size: .92rem; }
.card-cmd { font: .8rem var(--mono); color: var(--accent); }

/* ---------- content pages ---------- */
.page-head { margin-bottom: 2rem; }
.eyebrow { font: .85rem var(--mono); color: var(--accent); margin: 0 0 .4rem; }
.page-head h1, .post h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); letter-spacing: -.03em; line-height: 1.15; margin: 0 0 .6rem; }
.lede { color: var(--text-2); font-size: 1.08rem; margin: 0; }
.block { margin: 2.5rem 0; }
.block h2, .cat h2 { font-size: 1.3rem; letter-spacing: -.01em; margin: 0 0 1rem; }
.prose p { color: var(--text-2); }
.note { color: var(--warn); font-size: .9rem; background: color-mix(in srgb, var(--warn) 10%, transparent); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); border-radius: 8px; padding: .55rem .8rem; }
.block h3 { font-size: 1rem; margin: 1.5rem 0 .6rem; }
.small { font-size: .88rem; }
.big5-what { margin: -.4rem 0 1rem; font-size: .92rem; }

.principles { list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; }
.principles li { padding: .6rem .85rem; background: var(--bg-2); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 8px; color: var(--text-2); }
.principles strong { color: var(--text); }

.deeper { display: grid; gap: .25rem; margin: -1rem 0 2.5rem; padding: 1rem 1.2rem; border-radius: 12px; border: 1px dashed color-mix(in srgb, var(--accent) 55%, var(--line)); background: var(--bg-2); color: var(--text); text-decoration: none; transition: border-color .15s, transform .15s; }
.deeper:hover { border-style: solid; transform: translateY(-1px); color: var(--text); }
.deeper span:last-child { color: var(--text-2); font-size: .92rem; }
.mf-sec { margin-bottom: 1.4rem; }
.mf-sec h3 { margin-top: 1.2rem; }
[id] { scroll-margin-top: 5rem; } /* keep jump targets clear of the sticky top bar */
.mf-steps { padding-left: 1.3rem; color: var(--text-2); }
.mf-steps li { margin: .35rem 0; }
.mf-steps strong { color: var(--text); }
.mf-comp-list { list-style: none; padding: 0; margin: .4rem 0 1.2rem; display: grid; gap: .5rem; }
.mf-comp-list li { padding: .6rem .85rem; border-radius: 8px; background: var(--bg-3); color: var(--text-2); }
.mf-comp-list strong { color: var(--text); }
.mf-comp { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem .8rem; margin: .6rem 0 1.2rem; }
.mf-comp p { margin: 0; padding: .55rem .75rem; border-radius: 8px; font-size: .92rem; }
.mf-comp .mine { background: var(--bg-3); color: var(--text-2); }
.mf-comp .yours { background: color-mix(in srgb, var(--accent) 12%, var(--bg-2)); border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line)); }
.mf-close { margin-top: 1rem; font-weight: 600; }
.mf-summary p { margin: .25rem 0; font-size: 1.1rem; }
.mf-summary p:last-child { color: var(--accent); font-weight: 700; }

.lf-tagline { margin: -.6rem 0 .8rem; color: var(--accent); font: .9rem var(--mono); }
.lf-row { display: grid; grid-template-columns: 7rem 1fr; gap: .6rem; align-items: start; margin: 1rem 0; }
.lf-label { font: 600 .75rem var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-3); padding-top: .35rem; }
.lf-chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .4rem; }
.lf-chips li { padding: .3rem .7rem; border-radius: 999px; background: var(--bg-2); border: 1px solid var(--line); font-size: .9rem; }
.lf-chips.alt li { font-family: var(--mono); font-size: .82rem; color: var(--text-2); }
.lf-few { display: grid; grid-template-columns: repeat(3, 1fr); gap: .7rem; margin: 1.2rem 0; }
.lf-few-item { background: var(--bg-2); border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line)); border-radius: 12px; padding: .9rem 1rem; }
.lf-letter { display: block; font: 700 2rem var(--mono); color: var(--accent); line-height: 1; margin-bottom: .3rem; }
.lf-few-item p { margin: .3rem 0 0; color: var(--text-2); font-size: .9rem; }
.lf-checkin { margin: 1rem 0; padding: .9rem 1rem; border-radius: 12px; background: var(--bg-3); }
.lf-checkin ol { margin: .5rem 0 0; padding-left: 1.3rem; color: var(--text-2); }
.lf-checkin li { margin: .2rem 0; }
@media (max-width: 640px) {
  .lf-row { grid-template-columns: 1fr; gap: .3rem; }
  .lf-few { grid-template-columns: 1fr; }
}

.shelf { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: .9rem; }
.shelf-group { background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.1rem; }
.shelf-group h3 { margin: 0 0 .5rem; font: 600 .78rem var(--mono); color: var(--accent); text-transform: uppercase; letter-spacing: .06em; }
.shelf-group ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; }
.shelf-group li strong { display: block; font-size: .95rem; }
.shelf-group li span { color: var(--text-3); font-size: .85rem; }

.medium-box { margin: 0 0 2rem; padding: 1.1rem 1.2rem; border-radius: 14px; border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--line)); background: color-mix(in srgb, var(--accent) 8%, var(--bg-2)); }
.medium-head strong { display: block; font-size: 1.1rem; }
.medium-head span { color: var(--text-2); font-size: .92rem; }
.medium-links { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: .6rem; margin-top: .9rem; }
.medium-links a { display: block; padding: .7rem .85rem; border-radius: 10px; background: var(--bg-2); border: 1px solid var(--line); color: var(--text); text-decoration: none; transition: border-color .15s, transform .15s; }
.medium-links a:hover { border-color: var(--accent); transform: translateY(-1px); }
.medium-links strong { display: block; color: var(--accent); }
.medium-links span { color: var(--text-3); font-size: .85rem; }

.big5 { display: grid; gap: 1.1rem; }
.trait-head { display: flex; justify-content: space-between; align-items: baseline; }
.score { font: .85rem var(--mono); color: var(--text-3); }
.bar { height: 10px; background: var(--bg-3); border-radius: 99px; overflow: hidden; margin: .35rem 0 .45rem; }
.bar span { display: block; height: 100%; border-radius: 99px; }
.trait p { margin: 0; color: var(--text-2); font-size: .95rem; }

.ticks { list-style: none; padding: 0; margin: 0; }
.ticks li { padding-left: 1.5rem; position: relative; margin: .45rem 0; color: var(--text-2); }
.ticks li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }
.skills { display: grid; gap: .7rem; margin: 0; }
.skills div { display: grid; grid-template-columns: 170px 1fr; gap: 1rem; padding-bottom: .7rem; border-bottom: 1px solid var(--line); }
.skills dt { font-weight: 600; }
.skills dd { margin: 0; color: var(--text-2); }
.callout { background: var(--bg-2); border: 1px solid var(--line); border-radius: 14px; padding: 1.4rem 1.5rem; }
.btn { display: inline-block; background: var(--accent); color: var(--bg); padding: .55rem 1rem; border-radius: 9px; text-decoration: none; font-weight: 600; margin: .25rem .4rem .25rem 0; }
.btn:hover { color: var(--bg); filter: brightness(1.1); }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

.cat-jump { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 2rem; }
.cat-jump a { font-size: .85rem; padding: .3rem .7rem; border: 1px solid var(--line); border-radius: 999px; color: var(--text-2); text-decoration: none; background: var(--bg-2); }
.cat-jump a:hover { border-color: var(--accent); color: var(--accent); }
.cat-jump span { color: var(--text-3); font-size: .8em; margin-left: .15rem; }
.cat { margin-bottom: 2.25rem; scroll-margin-top: 80px; }
.post-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.post-list li { display: grid; grid-template-columns: 1fr auto; gap: .1rem 1rem; padding: .8rem 0; border-bottom: 1px solid var(--line); }
.post-list a { color: var(--text); text-decoration: none; }
.post-list a:hover { color: var(--accent); }
.post-list .desc { grid-column: 1; color: var(--text-2); font-size: .92rem; }
.post-list time { grid-row: 1; grid-column: 2; color: var(--text-3); font: .8rem var(--mono); white-space: nowrap; }

.proj-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }
.proj { background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; padding: 1.2rem 1.3rem; }
.proj-top { display: flex; justify-content: space-between; align-items: baseline; gap: .5rem; }
.proj h2 { font-size: 1.15rem; margin: 0; }
.phase { font: .72rem var(--mono); color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); border-radius: 99px; padding: .1rem .5rem; white-space: nowrap; }
.proj p { color: var(--text-2); margin: .6rem 0; font-size: .95rem; }
.proj-links { display: flex; gap: 1rem; font-size: .9rem; }

.link-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .6rem; }
.link-list a { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 1rem 1.2rem; background: var(--bg-2); border: 1px solid var(--line); border-radius: 12px; color: var(--text); text-decoration: none; font-weight: 600; }
.link-list a:hover { border-color: var(--accent); }
.link-list span { color: var(--text-3); font: 400 .85rem var(--mono); }

.post .crumbs { font-size: .9rem; margin: 0 0 1rem; }
.post .meta { color: var(--text-3); font-size: .88rem; margin: .6rem 0 2rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.post-body { color: var(--text); }
.post-body h1, .post-body h2, .post-body h3 { letter-spacing: -.01em; line-height: 1.3; margin-top: 2rem; }
.post-body blockquote { margin: 1rem 0; padding: .2rem 1rem; border-left: 3px solid var(--accent); color: var(--text-2); }
.post-body table { border-collapse: collapse; display: block; overflow-x: auto; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: .4rem .7rem; }

/* ---------- mobile ---------- */
@media (max-width: 640px) {
  main { padding-top: 1.5rem; }
  .brand { font-size: .9rem; }
  .topnav { gap: .4rem; flex-wrap: wrap; row-gap: .35rem; }
  .topnav .theme-toggle { margin-left: auto; }
  .topnav nav { order: 3; width: 100%; margin-left: 0; justify-content: space-between; }
  .topnav nav a { padding: .35rem .45rem; font-size: .82rem; }
  .topnav nav a:first-child { display: none; } /* logo already links home */
  .term-screen { font-size: 13px; min-height: 220px; max-height: 60vh; padding: .8rem; }
  .prompt .p-host { display: none; }
  .hero h1 .muted { font-size: .85em; }
  .term-out .grid { grid-template-columns: 1fr; gap: 0 0; }
  .term-out .grid > :nth-child(odd) { margin-top: .4rem; }
  .skills div { grid-template-columns: 1fr; gap: .2rem; }
  .post-list li { grid-template-columns: 1fr; }
  .post-list time { grid-row: auto; grid-column: 1; }
  .foot-hint { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }