/* Andy Ke · personal site · design tokens and layout */
:root {
  --ground: #EDEFEB; --surface: #FFFFFF; --surface-2: #F6F7F4;
  --ink: #15201A; --ink-2: #3C4A42; --muted: #63736A;
  --line: #CDD5CE; --line-strong: #A9B5AC;
  --accent: #0F7B52; --accent-ink: #FFFFFF; --accent-soft: #DCEFE5;
  --copper: #B9611F; --copper-soft: #F5E4D6;
  --bad: #A63A2B; --bad-soft: #F5DDD8;
  --dark: #15201A; --dark-ink: #E7ECE8; --dark-muted: #93A199; --dark-line: #2B3730; --dark-accent: #4FC08B; --dark-copper: #E0894A;
  --code-bg: #15201A; --code-ink: #D8E2DA;
  --shadow: 0 1px 2px rgba(21,32,26,.06), 0 8px 24px rgba(21,32,26,.06);
  --display: "Bricolage Grotesque", "Arial Narrow", "Helvetica Neue", sans-serif;
  --body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ground: #0F1613; --surface: #171F1B; --surface-2: #1D2622;
    --ink: #E7ECE8; --ink-2: #C3CCC6; --muted: #93A199;
    --line: #2B3730; --line-strong: #46554C;
    --accent: #4FC08B; --accent-ink: #0B1A12; --accent-soft: #173527;
    --copper: #E0894A; --copper-soft: #3A2718;
    --bad: #E27B6A; --bad-soft: #3E1F1A;
    --dark: #0B100D; --dark-line: #24302A;
    --code-bg: #0B100D; --code-ink: #C9D5CC;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --ground: #0F1613; --surface: #171F1B; --surface-2: #1D2622;
  --ink: #E7ECE8; --ink-2: #C3CCC6; --muted: #93A199;
  --line: #2B3730; --line-strong: #46554C;
  --accent: #4FC08B; --accent-ink: #0B1A12; --accent-soft: #173527;
  --copper: #E0894A; --copper-soft: #3A2718;
  --bad: #E27B6A; --bad-soft: #3E1F1A;
  --dark: #0B100D; --dark-line: #24302A;
  --code-bg: #0B100D; --code-ink: #C9D5CC;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--body); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.1; margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 6vw, 4.4rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.25rem); font-weight: 700; }
h3 { font-size: 1.35rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; }
p { margin: 0; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
img { max-width: 100%; display: block; }
.mono { font-family: var(--mono); }
.num { font-variant-numeric: tabular-nums; }
.eyebrow { font-family: var(--mono); font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.eyebrow.accent { color: var(--accent); }
.eyebrow.copper { color: var(--copper); }
.muted { color: var(--muted); }
.ink2 { color: var(--ink-2); }
.small { font-size: .9rem; }
.wrap { max-width: 1180px; margin: 0 auto; padding-inline: 20px; }
section { padding-block: 40px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.section-head .eyebrow { font-size: .72rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; font-weight: 600; font-size: 1rem; text-decoration: none; border: 1.5px solid transparent; cursor: pointer; font-family: var(--body); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-ghost { border-color: var(--accent); color: var(--accent); background: transparent; }
.btn-dark { background: var(--dark); color: var(--dark-ink); }
.btn-light { background: var(--dark-accent); color: #0B1A12; }
.btn.sm { min-height: 44px; padding: 0 18px; font-size: .95rem; }

/* Nav */
.site-nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--ground); border-bottom: 1px solid var(--line); }
.site-nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }
.brand { font-family: var(--display); font-weight: 800; font-size: 1.35rem; color: var(--ink); text-decoration: none; }
.nav-links { display: flex; gap: 26px; font-size: .95rem; font-weight: 500; }
.nav-links a { color: var(--ink-2); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--ink); border-bottom: 2px solid var(--accent); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
@media (max-width: 820px) {
  .nav-links { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; gap: 0; background: var(--surface); border-bottom: 1px solid var(--line); padding: 8px 20px 16px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .site-nav .cta { display: none; }
}

/* Hero */
.hero { padding-block: 72px 40px; display: grid; gap: 24px; }
.hero h1 { max-width: 20ch; }
.hero .lede { font-size: clamp(1.1rem, 2vw, 1.4rem); color: var(--ink-2); max-width: 60ch; }
.hero .actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }

/* Offer card */
.offer { display: grid; grid-template-columns: minmax(0, 1.4fr) auto auto; gap: 24px; align-items: center; background: var(--surface); border: 1px solid var(--line); padding: 24px 28px; }
.offer .title { font-family: var(--display); font-weight: 700; font-size: 1.5rem; line-height: 1.15; }
.offer .price { font-family: var(--mono); font-size: 1.5rem; }
@media (max-width: 820px) { .offer { grid-template-columns: minmax(0, 1fr); } }

/* Proof strip */
.proof { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.stat { background: var(--surface); border: 1px solid var(--line); padding: 22px 22px 18px; display: grid; gap: 8px; align-content: start; color: var(--ink); text-decoration: none; transition: border-color .18s ease, transform .18s ease; }
.stat:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.stat .big { font-family: var(--display); font-weight: 800; font-size: clamp(1.9rem, 3vw, 2.4rem); line-height: 1; color: var(--copper); font-variant-numeric: tabular-nums; }
.stat .def { font-family: var(--mono); font-size: .7rem; color: var(--muted); line-height: 1.5; }
@media (max-width: 900px) { .proof { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .proof { grid-template-columns: minmax(0, 1fr); } }

/* Cards and grids */
.card { background: var(--surface); border: 1px solid var(--line); padding: 20px 22px; display: grid; gap: 8px; align-content: start; }
.card.soft { background: var(--surface-2); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); } }

.case-card { text-decoration: none; color: var(--ink); background: var(--surface); border: 1px solid var(--line); padding: 24px; display: grid; gap: 14px; align-content: start; }
.case-card:hover { box-shadow: var(--shadow); }
.case-card .title { font-family: var(--display); font-weight: 700; font-size: 1.4rem; line-height: 1.15; }
.case-card .more { font-weight: 600; font-size: .9rem; color: var(--accent); }

/* Bars */
.bars { display: flex; align-items: flex-end; gap: 14px; height: 96px; border-bottom: 1px solid var(--line); }
.bars .b { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.bars .b span { font-family: var(--mono); font-size: .75rem; }
.bars .b i { display: block; width: 100%; background: var(--line-strong); }
.bars .b i.g { background: var(--accent); } .bars .b i.c { background: var(--copper); }
.bars.tall { height: 130px; }
.legend { display: flex; justify-content: space-between; font-family: var(--mono); font-size: .68rem; color: var(--muted); gap: 8px; flex-wrap: wrap; }
.hrows { display: grid; gap: 7px; }
.hrow { display: grid; grid-template-columns: minmax(120px, 160px) minmax(0, 1fr) 60px; gap: 8px; align-items: center; font-size: .82rem; }
.hrow i { display: block; height: 14px; background: var(--line-strong); }
.hrow i.g { background: var(--accent); } .hrow i.c { background: var(--copper); }
.hrow span:last-child { font-family: var(--mono); text-align: right; }
.kv { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; font-size: .85rem; }
.kv span:nth-child(even) { font-family: var(--mono); text-align: right; }

/* Rules and log */
.two-col { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 24px; }
@media (max-width: 900px) { .two-col { grid-template-columns: minmax(0, 1fr); } }
.rules { list-style: none; margin: 0; padding: 0; background: var(--surface); border: 1px solid var(--line); }
.rules li { display: grid; grid-template-columns: 48px minmax(0, 1fr) auto; gap: 14px; padding: 14px 18px; border-bottom: 1px solid var(--line); align-items: baseline; }
.rules li:last-child { border-bottom: 0; }
.rules .k { font-family: var(--display); font-weight: 800; font-size: 1.3rem; color: var(--accent); }
.rules b { display: block; }
.rules .ref { font-family: var(--mono); font-size: .68rem; color: var(--muted); }
.log { display: grid; gap: 14px; }
.log .entry { padding-left: 16px; border-left: 2px solid var(--line); display: grid; gap: 4px; }
.log .entry.now { border-left-color: var(--accent); }
.log .date { font-family: var(--mono); font-size: .74rem; color: var(--muted); }

/* Tools */
.tool { background: var(--surface); border: 1px solid var(--line); padding: 20px; display: grid; gap: 8px; align-content: start; }
.tool.dark { background: var(--dark); color: var(--dark-ink); border-color: var(--dark-line); }
.tool.dark .eyebrow { color: var(--dark-accent); }
.tool .title { font-family: var(--display); font-weight: 700; font-size: 1.25rem; }

/* Calculator */
.calc { background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
@media (max-width: 700px) { .calc { grid-template-columns: minmax(0, 1fr); } }
.calc .in { padding: 20px; display: grid; gap: 14px; border-right: 1px solid var(--line); }
@media (max-width: 700px) { .calc .in { border-right: 0; border-bottom: 1px solid var(--line); } }
.calc label { display: grid; gap: 4px; font-size: .86rem; color: var(--ink-2); }
.calc label .v { display: flex; justify-content: space-between; }
.calc label output { font-family: var(--mono); color: var(--ink); }
.calc input[type=range] { width: 100%; accent-color: var(--accent); }
.calc .out { padding: 20px; display: grid; gap: 12px; align-content: start; background: var(--surface-2); }
.calc .big { font-family: var(--display); font-weight: 800; font-size: 2.6rem; line-height: 1; color: var(--accent); }
.calc .big.warn { color: var(--copper); }

/* About + footer */
.about-teaser { display: flex; gap: 20px; align-items: flex-start; text-decoration: none; color: var(--ink); }
.photo { background: var(--line); display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: .7rem; color: var(--ink-2); text-align: center; padding: 8px; flex-shrink: 0; }
.portrait-mark { width: 140px; height: 168px; flex-shrink: 0; display: grid; place-items: center; background: var(--dark); color: var(--dark-accent); font-family: var(--display); font-size: 2.5rem; font-weight: 800; letter-spacing: -.06em; }
.contact-card { background: var(--surface); border: 1px solid var(--line); padding: 24px; display: grid; gap: 18px; }
.contact-card a { overflow-wrap: anywhere; }

/* Evidence-first case additions */
.case-snapshot { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 0 0 28px; }
.case-snapshot > div { border-top: 3px solid var(--line-strong); padding: 12px 14px 0; display: grid; gap: 4px; }
.case-snapshot > div:last-child { border-top-color: var(--accent); }
.case-snapshot strong { font-family: var(--display); font-size: 1.12rem; line-height: 1.25; }
.artifact-label { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; font-family: var(--mono); font-size: .66rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.artifact-label .status { color: var(--accent); }
@media (max-width: 700px) { .case-snapshot { grid-template-columns: minmax(0, 1fr); } .portrait-mark { width: 96px; height: 116px; } }
.footer-cta { background: var(--dark); color: var(--dark-ink); padding-block: 56px; }
.footer-cta .wrap { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-cta h2 { font-weight: 800; }
.footer-cta .sub { color: var(--dark-muted); }
.site-foot { padding-block: 24px; font-size: .85rem; color: var(--muted); border-top: 1px solid var(--line); }
.site-foot .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* Case pages */
.case-head { display: grid; grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr); gap: 32px; padding-block: 56px 32px; align-items: start; }
@media (max-width: 900px) { .case-head { grid-template-columns: minmax(0, 1fr); } }
.case-head h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); }
.case-head .lede { font-size: 1.2rem; line-height: 1.5; color: var(--ink-2); }
.ctx { background: var(--surface); border: 1px solid var(--line); padding: 20px; display: grid; gap: 10px; font-size: .92rem; }
.ctx .role { border-top: 1px solid var(--line); padding-top: 10px; display: grid; gap: 6px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-family: var(--mono); font-size: .68rem; padding: 3px 8px; background: var(--accent-soft); color: var(--accent); }
.chip.copper { background: var(--copper-soft); color: var(--copper); }

.solmap { display: grid; gap: 14px; }
.solmap-grid { display: grid; grid-template-columns: 340px minmax(0, 1fr); gap: 14px; align-items: stretch; }
@media (max-width: 900px) { .solmap-grid { grid-template-columns: minmax(0, 1fr); } }
.issue { background: var(--dark); color: var(--dark-ink); padding: 22px; display: grid; gap: 10px; align-content: start; }
.issue .eyebrow { color: var(--dark-accent); }
.issue .title { font-family: var(--display); font-weight: 700; font-size: 1.4rem; line-height: 1.15; }
.issue p { color: #C3CCC6; font-size: .92rem; }
.mock { background: var(--surface); border: 1px solid var(--line); padding: 18px; display: grid; gap: 10px; }
.mock .mhead { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-family: var(--mono); font-size: .68rem; color: var(--muted); }
.mblock { border: 1px solid var(--line); background: var(--surface-2); padding: 12px 14px; display: grid; gap: 6px; font-size: .8rem; position: relative; }
.mblock .mlabel { font-family: var(--mono); font-size: .62rem; color: var(--muted); letter-spacing: .06em; display: flex; align-items: center; gap: 8px; }
.mblock .mtitle { font-family: var(--display); font-weight: 700; font-size: 1.05rem; line-height: 1.15; }
.mgrid { display: grid; gap: 8px; }
.mgrid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.mgrid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mgrid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 640px) { .mgrid.c3, .mgrid.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .mgrid.c2 { grid-template-columns: minmax(0, 1fr); } }
.mbtn { min-height: 34px; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: .8rem; }
.mbtn.dark { background: var(--dark); color: #FFFFFF; } .mbtn.grey { background: #B9BFB9; color: #5A625C; letter-spacing: .04em; } .mbtn.green { background: var(--accent); color: var(--accent-ink); }
.mrow { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.mrow span:last-child { font-family: var(--mono); }
.mnote { font-family: var(--mono); font-size: .66rem; color: var(--muted); }
.badge { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: 50%; background: var(--copper); color: #FFFFFF; font-family: var(--display); font-weight: 800; font-size: .78rem; flex-shrink: 0; }
.mtable { border: 1px solid var(--line); background: var(--surface-2); font-size: .8rem; overflow-x: auto; }
.mtable .tr { display: grid; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--line); align-items: center; min-width: 560px; }
.mtable .tr:last-child { border-bottom: 0; }
.mtable .th { font-family: var(--mono); font-size: .62rem; color: var(--muted); }
.mtable i { display: inline-block; height: 10px; background: var(--line-strong); vertical-align: middle; }
.mtable i.g { background: var(--accent); } .mtable i.c { background: var(--copper); }

.fixes { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; }
.fix { background: var(--surface); border: 1px solid var(--line); padding: 14px 16px; display: grid; gap: 6px; align-content: start; }
.fix .name { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: .95rem; }
.fix .targets { font-family: var(--mono); font-size: .66rem; color: var(--accent); letter-spacing: .06em; }
.fix p { font-size: .88rem; color: var(--ink-2); }

.stepper { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.stepper div { background: var(--dark); color: var(--dark-ink); padding: 12px 14px; display: grid; gap: 2px; font-size: .85rem; }
.stepper .eyebrow { color: var(--dark-accent); font-size: .64rem; }
@media (max-width: 900px) { .stepper { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 520px) { .stepper { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.stages { display: grid; gap: 14px; }
.stage { display: grid; grid-template-columns: 150px minmax(0, 1fr) minmax(0, 1fr); background: var(--surface); border: 1px solid var(--line); }
.stage > div { padding: 20px; display: grid; gap: 8px; align-content: start; }
.stage > div + div { border-left: 1px solid var(--line); }
.stage .k { font-family: var(--display); font-weight: 800; font-size: 1.6rem; color: var(--accent); }
.stage .colh { font-family: var(--mono); font-size: .64rem; letter-spacing: .1em; color: var(--accent); }
.stage .colh.copper { color: var(--copper); }
.stage p, .stage li { font-size: .92rem; color: var(--ink-2); }
.stage ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; }
@media (max-width: 900px) { .stage { grid-template-columns: minmax(0, 1fr); } .stage > div + div { border-left: 0; border-top: 1px solid var(--line); } }
.code { background: var(--code-bg); color: var(--code-ink); padding: 12px 14px; font-family: var(--mono); font-size: .76rem; line-height: 1.7; overflow-x: auto; white-space: pre; }
.build-table { display: grid; }
.build-table .r { display: grid; grid-template-columns: 170px minmax(0, 1fr) minmax(0, 1fr); border-bottom: 1px solid var(--line); }
.build-table .r:last-child { border-bottom: 0; }
.build-table .r > div { padding: 14px 16px; font-size: .88rem; color: var(--ink-2); }
.build-table .r > div:first-child { color: var(--ink); }
.build-table .r.h > div { background: var(--surface-2); font-family: var(--mono); font-size: .62rem; letter-spacing: .1em; }
@media (max-width: 900px) { .build-table .r { grid-template-columns: minmax(0, 1fr); } }
.release { display: grid; grid-template-columns: 120px minmax(0, 1fr) 70px; gap: 6px 10px; font-size: .85rem; }
.release .m { font-family: var(--mono); font-size: .74rem; }
.release .s { font-family: var(--mono); font-size: .74rem; color: var(--accent); }
.release .s.hold { color: var(--copper); }
@media (max-width: 520px) { .release { grid-template-columns: 90px minmax(0, 1fr) 60px; } }

.claim-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px; padding-block: 8px 40px; }
@media (max-width: 900px) { .claim-grid { grid-template-columns: minmax(0, 1fr); } }
.claim { background: var(--copper-soft); border-left: 4px solid var(--copper); padding: 18px 22px; display: grid; gap: 6px; }
.claim p { font-size: .95rem; }
.rule-box { display: grid; gap: 8px; font-size: .92rem; color: var(--ink-2); }
.case-nav { border-top: 1px solid var(--line); padding-block: 28px 48px; }
.case-nav .wrap { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }

/* About */
.timeline { background: var(--surface); border: 1px solid var(--line); }
.timeline .row { display: grid; grid-template-columns: 170px 240px minmax(0, 1fr); gap: 20px; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.timeline .row:last-child { border-bottom: 0; }
.timeline .when { font-family: var(--mono); font-size: .8rem; color: var(--accent); }
.timeline .what { font-size: .92rem; color: var(--ink-2); }
@media (max-width: 900px) { .timeline .row { grid-template-columns: minmax(0, 1fr); gap: 6px; } }

@media (prefers-reduced-motion: no-preference) { .case-card, .btn { transition: box-shadow .15s ease, background .15s ease; } }