@font-face {
  font-family: "Archivo";
  src: url("/assets/fonts/archivo-wdth.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}

/* Layout: one left-aligned reading column; the hero chart card is the only boxed object on the page. */
:root {
  --paper: #E7EAE6;   /* cool hardware-label grey */
  --panel: #F4F6F3;
  --ink: #1E2523;     /* graphite */
  --muted: #59635F;
  --line: #C9CFCA;
  --accent: #3D7A68;  /* clinical green */
  --warm: #B9822A;    /* ochre, used once per chapter marker */
  --focus: #2E5F8A;
  --step: clamp(1.02rem, 0.97rem + 0.25vw, 1.18rem);
  --gutter: clamp(16px, 4vw, 56px);
  --measure: 62ch;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #151A19; --panel: #1C2321; --ink: #E3E8E5; --muted: #9DA8A3;
    --line: #2E3734; --accent: #63A992; --warm: #D9A447; --focus: #8DB6DA;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #151A19; --panel: #1C2321; --ink: #E3E8E5; --muted: #9DA8A3;
  --line: #2E3734; --accent: #63A992; --warm: #D9A447; --focus: #8DB6DA;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Archivo", system-ui, sans-serif;
  font-size: var(--step);
  line-height: 1.6;
  font-stretch: 100%;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; }
.skip:focus { left: 8px; z-index: 10; }

.wrap, .nav, main, .foot {
  max-width: 1180px; margin: 0 auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

/* nav */
.nav { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; padding-block: 20px; }
.brand { font-weight: 800; font-stretch: 125%; text-decoration: none; font-size: 1.05rem; letter-spacing: -0.01em; }
.nav nav { display: flex; gap: clamp(12px, 2.4vw, 28px); flex-wrap: wrap; justify-content: flex-end; }
.nav nav a { text-decoration: none; color: var(--muted); font-size: 0.95rem; }
.nav nav a:hover { color: var(--ink); }

/* hero */
.hero { padding-block: clamp(20px, 5vw, 56px) clamp(48px, 8vw, 96px); }
h1 {
  margin: 0 0 0.35em;
  font-size: clamp(2.9rem, 1rem + 8.4vw, 8rem);
  line-height: 0.88;
  font-weight: 900;
  font-stretch: 125%;
  letter-spacing: -0.035em;
  max-width: 14ch;
  text-wrap: balance;
}
.hero-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.lede { font-size: clamp(1.3rem, 1.05rem + 1vw, 1.8rem); line-height: 1.25; font-weight: 600; font-stretch: 90%; margin: 0 0 0.8em; max-width: 26ch; }
.hero-copy > p:not(.lede) { color: var(--muted); max-width: 44ch; margin: 0; }

/* the then/now chart */
.chart { margin: 0; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: clamp(16px, 2.2vw, 26px); }
.chart-tabs { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; margin-bottom: 18px; }
.chart-tabs button {
  font: inherit; font-size: 0.95rem; font-weight: 600; color: var(--muted);
  background: transparent; border: 0; border-radius: 999px; padding: 6px 16px; cursor: pointer;
}
.chart-tabs button[aria-selected="true"] { background: var(--ink); color: var(--paper); }
.chart-body { margin: 0; display: grid; gap: 0; }
.chart-body div { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.chart-body dt { color: var(--muted); font-size: 0.92rem; }
.chart-body dd { margin: 0; font-weight: 600; }
.chart figcaption { margin-top: 14px; font-stretch: 112%; font-weight: 800; font-size: 1.15rem; color: var(--accent); }

/* story */
.story { border-top: 1px solid var(--line); padding-block: clamp(32px, 6vw, 72px); display: grid; gap: clamp(40px, 7vw, 84px); }
.chapter { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); column-gap: clamp(24px, 5vw, 64px); align-items: start; }
.chapter > :not(h2) + :not(h2) { margin-top: 14px; }
.chapter > h2 { grid-column: 1; grid-row: 1 / span 20; }
.chapter > :not(h2) { grid-column: 2; max-width: var(--measure); }
.chapter p { margin: 0; }
h2 {
  margin: 0;
  font-size: clamp(1.7rem, 1.2rem + 1.9vw, 2.75rem);
  line-height: 1.02;
  font-weight: 800;
  font-stretch: 112%;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.chapter > h2::before {
  content: ""; display: block; width: 28px; height: 4px; border-radius: 2px;
  background: var(--warm); margin-bottom: 14px;
}
.pull { font-size: clamp(1.35rem, 1.1rem + 1vw, 1.9rem); line-height: 1.2; font-weight: 700; font-stretch: 95%; color: var(--accent); }
.lessons, .life, .now { list-style: none; margin: 0; padding: 0; }
.lessons li { padding: 10px 0; border-top: 1px solid var(--line); }
.lessons li:first-child { border-top: 0; padding-top: 0; }
.life { display: grid; gap: 18px; }
.life h3 { margin: 0 0 4px; font-size: 1.1rem; }
.life p { color: var(--muted); }
.close p { font-size: clamp(1.15rem, 1rem + 0.5vw, 1.4rem); line-height: 1.45; }

/* now + tools */
.block { padding-block: clamp(40px, 7vw, 84px); border-top: 1px solid var(--line); }
.block > h2 { margin-bottom: 0.5em; }
.intro { max-width: var(--measure); color: var(--muted); margin: 0 0 1.8rem; }
.now { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(24px, 5vw, 64px); max-width: 960px; }
.now li { padding: 12px 0; border-top: 1px solid var(--line); }

.tools { list-style: none; margin: 0; padding: 0; }
.tools li { display: grid; grid-template-columns: 15rem minmax(0, 1fr) 15rem; gap: 6px 28px; align-items: baseline; padding: 16px 0; border-top: 1px solid var(--line); }
.tools h3 { margin: 0; font-size: 1.05rem; }
.tools p { margin: 0; color: var(--muted); }
.tools .needs { font-size: 0.88rem; color: var(--muted); text-align: right; }

/* blog */
.posts { list-style: none; margin: 0; padding: 0; max-width: 760px; }
.posts li { padding: 18px 0; border-top: 1px solid var(--line); }
.posts time, .post-meta { color: var(--muted); font-size: 0.9rem; }
.posts h3 { margin: 4px 0 6px; font-size: 1.25rem; line-height: 1.2; }
.posts h3 a { text-decoration: none; }
.posts h3 a:hover { text-decoration: underline; }
.posts p { margin: 0; color: var(--muted); }
.posts.compact li { display: flex; gap: 16px; align-items: baseline; flex-wrap: wrap; padding: 12px 0; }
.posts.compact time { flex: 0 0 9rem; }
.more { margin: 14px 0 0; }
.block.first { border-top: 0; padding-top: clamp(20px, 5vw, 56px); }
.as-h1 { font-size: clamp(2.4rem, 1rem + 5vw, 5rem); line-height: 0.95; font-weight: 900; font-stretch: 125%; letter-spacing: -0.03em; }
.post { max-width: var(--measure); padding-block: clamp(20px, 5vw, 56px) clamp(48px, 8vw, 96px); }
.post .post-meta { margin: 0 0 10px; }
.post h1 { font-size: clamp(2.1rem, 1rem + 3.6vw, 3.6rem); line-height: 1; max-width: 20ch; margin-bottom: 0.4em; }
.post .lede { max-width: none; color: var(--muted); font-weight: 500; margin-bottom: 1.6em; }
.post h2 { font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem); margin: 1.8em 0 0.5em; }
.post h3 { font-size: 1.15rem; margin: 1.4em 0 0.4em; }
.post p, .post ul, .post ol { margin: 0 0 1em; }
.post ul, .post ol { padding-left: 1.3em; }
.post li { margin-bottom: 0.4em; }
.post pre { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow: auto; font-size: 0.9rem; line-height: 1.5; }
.post code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
.post :not(pre) > code { background: var(--panel); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
.post blockquote { margin: 0 0 1em; padding-left: 16px; border-left: 3px solid var(--warm); color: var(--muted); }
.post .post-foot { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 40px; color: var(--muted); font-size: 0.95rem; }

.foot { padding-block: 28px 40px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--line); }
.foot p { margin: 0; }

@media (max-width: 900px) {
  .hero-row { grid-template-columns: 1fr; }
  .chapter { grid-template-columns: 1fr; }
  .chapter > h2, .chapter > :not(h2) { grid-column: 1; grid-row: auto; }
  .chapter > h2 { margin-bottom: 14px; }
  .now { grid-template-columns: 1fr; }
  .tools li { grid-template-columns: 1fr; }
  .tools .needs { text-align: left; }
}
@media (max-width: 520px) {
  h1 { max-width: none; }
  .nav { flex-direction: column; align-items: flex-start; gap: 8px; }
  .nav nav { justify-content: flex-start; }
  .chart-body div { grid-template-columns: 1fr; gap: 2px; }
}