:root {
  --bg: #F4F5F7;
  --surface: #FFFFFF;
  --ink: #0F1115;
  --text: #2A2E35;
  --muted: #6B7280;
  --faint: #9CA3AF;
  --line: #E4E6EA;
  --soft: #F8F9FA;
  --hl: #FFE14D;
  --hl-ink: #0F1115;
  --bad: #DC2626;
  --badge: #0F1115;
  --badge-ink: #FFFFFF;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 2px 8px -2px rgba(16, 24, 40, .06);
  --radius: 16px;
  --font: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0E0F12; --surface: #17191D; --ink: #F3F4F6; --text: #E2E4E8; --muted: #9CA3AF; --faint: #6B7280;
    --line: #262930; --soft: #1C1F24; --hl: #FDE047; --hl-ink: #0F1115; --bad: #F87171;
    --badge: #F3F4F6; --badge-ink: #0F1115; --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0E0F12; --surface: #17191D; --ink: #F3F4F6; --text: #E2E4E8; --muted: #9CA3AF; --faint: #6B7280;
  --line: #262930; --soft: #1C1F24; --hl: #FDE047; --hl-ink: #0F1115; --bad: #F87171;
  --badge: #F3F4F6; --badge-ink: #0F1115; --shadow: none; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 400 17px/1.65 var(--font); overflow-x: hidden;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 6px; }
.wrap { max-width: 780px; margin-left: auto; margin-right: auto; padding-left: 16px; padding-right: 16px; }
@media (min-width: 720px) { .wrap { padding-left: 24px; padding-right: 24px; } }

/* highlight language: yellow is only ever used for "the specific bit" */
mark {
  background: var(--hl); color: var(--hl-ink); font-weight: 600;
  padding: .05em .3em; border-radius: 5px;
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
}
s.vague { color: var(--bad); text-decoration: line-through; text-decoration-thickness: 1.5px; text-decoration-color: var(--bad); }

/* layout: sidebar + main */
.layout { display: grid; grid-template-columns: 264px minmax(0, 1fr); min-height: 100vh; }
.side {
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
  background: var(--surface); border-right: 1px solid var(--line); padding: 24px 14px;
}
.logo { display: inline-block; font-weight: 800; font-size: 18px; color: var(--ink); text-decoration: none; letter-spacing: -.02em; padding: 0 8px; }
.logo mark { font-weight: 800; }
.side-kicker { font-size: 11.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); padding: 22px 10px 8px; }
.side-nav { display: flex; flex-direction: column; gap: 2px; }
.side-nav a {
  display: flex; align-items: center; gap: 11px; padding: 9px 10px; border-radius: 10px;
  color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px; line-height: 1.3;
}
.side-nav a:hover { background: var(--soft); color: var(--ink); }
.side-nav .n {
  flex: none; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 8px;
  background: var(--soft); box-shadow: inset 0 0 0 1px var(--line); color: var(--muted); font-size: 12.5px; font-weight: 800;
}
.side-nav a.on { background: var(--hl); color: var(--hl-ink); }
.side-nav a.on .n { background: var(--badge); color: var(--badge-ink); box-shadow: none; }
.side-sep { display: block; height: 1px; background: var(--line); margin: 10px 6px; }
.main { min-width: 0; }

@media (max-width: 900px) {
  .layout { display: block; }
  .side {
    position: sticky; top: 0; z-index: 30; height: auto; overflow: visible; padding: 0;
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px);
    border-right: 0; border-bottom: 1px solid var(--line);
  }
  .logo, .side-kicker, .side-sep { display: none; }
  .side-nav { flex-direction: row; gap: 6px; overflow-x: auto; padding: 10px 16px; scrollbar-width: none; }
  .side-nav::-webkit-scrollbar { display: none; }
  .side-nav a { flex: none; padding: 6px 12px 6px 6px; border-radius: 999px; font-size: 14px; box-shadow: inset 0 0 0 1px var(--line); gap: 8px; }
  .side-nav a.on { box-shadow: none; }
  .side-nav .n { width: 22px; height: 22px; border-radius: 999px; font-size: 11.5px; }
}

/* hero */
.hero { padding-top: 48px; padding-bottom: 4px; }
@media (max-width: 900px) { .hero { padding-top: 28px; } }
.kicker { font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
h1 { font-weight: 800; font-size: clamp(38px, 7vw, 54px); line-height: 1.05; letter-spacing: -.035em; color: var(--ink); margin: 6px 0 14px; }
.lead { font-size: clamp(19px, 2.6vw, 22px); line-height: 1.5; color: var(--ink); font-weight: 500; margin: 0 0 22px; letter-spacing: -.01em; }

/* sections */
.sec { padding-top: 52px; }
h2 { font-weight: 800; font-size: clamp(23px, 3.4vw, 28px); line-height: 1.2; letter-spacing: -.025em; color: var(--ink); margin: 0 0 18px; }
h3 { font-weight: 700; font-size: 18px; line-height: 1.35; letter-spacing: -.01em; color: var(--ink); margin: 0; }
.lbl { display: block; font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--faint); margin-bottom: 4px; }
.num {
  display: inline-grid; place-items: center; flex: none; width: 32px; height: 32px; border-radius: 9px;
  background: var(--badge); color: var(--badge-ink); font-weight: 800; font-size: 15px;
}
.num.sm { width: 28px; height: 28px; border-radius: 8px; font-size: 14px; }

/* example cards */
.ex-grid { display: grid; gap: 12px; }
.ex { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.ex-row { padding: 14px 18px; }
.ex-row p { margin: 0; }
.ex-row.b { background: var(--soft); color: var(--muted); font-size: 15.5px; border-bottom: 1px solid var(--line); }
.ex-row.a { color: var(--ink); font-size: 17px; line-height: 1.75; }
.ex-row.a .lbl { color: var(--ink); }
.ex-row.a + .ex-row.a { border-top: 1px solid var(--line); }
.hero .note { margin-top: 10px; }
.note a { color: var(--ink); font-weight: 700; text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 3px; text-underline-offset: 3px; }

.ex-tag { background: var(--soft); padding: 12px 18px 0; font-size: 13px; font-weight: 700; color: var(--ink); }
.ex-tag + .ex-row { padding-top: 8px; }

/* steps */
.steps { list-style: none; padding: 0; margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.step { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start; padding: 18px 20px; }
.step + .step { border-top: 1px solid var(--line); }
.step h3 { padding-top: 4px; }
.step p { margin: 3px 0 0; color: var(--muted); font-size: 16px; }
.step a, .ex a, .how a { color: var(--ink); font-weight: 700; text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 3px; text-underline-offset: 3px; }

.num.no { background: var(--bad); color: #fff; font-size: 14px; }
.steps-ex { margin-top: 20px; }
.sub-h { font-weight: 700; font-size: 15px; color: var(--ink); margin-bottom: 8px; }

/* 5 ways */
.ways { display: grid; gap: 30px; }
.way-h { display: flex; align-items: center; gap: 12px; }
.how { margin: 8px 0 12px; color: var(--muted); font-size: 16px; }

/* CTA buttons */
.cta-ex {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px;
}
.becomes { font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--faint); }
.btn { display: inline-block; font-weight: 700; font-size: 15px; line-height: 1.35; border-radius: 10px; padding: 11px 18px; }
.btn-b { background: var(--soft); color: var(--muted); box-shadow: inset 0 0 0 1px var(--line); text-decoration: line-through; text-decoration-color: var(--bad); text-decoration-thickness: 1.5px; }
.btn-a { background: var(--hl); color: var(--hl-ink); }

/* checklist */
.checklist { display: grid; gap: 8px; }
.check {
  display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line);
  border-radius: 14px; padding: 14px 18px; cursor: pointer; font-size: 16.5px; line-height: 1.7; color: var(--ink); box-shadow: var(--shadow);
}
.check input {
  appearance: none; -webkit-appearance: none; flex: none; width: 22px; height: 22px; margin: 3px 0 0;
  border: 2px solid var(--faint); border-radius: 7px; background: var(--surface); display: grid; place-content: center; cursor: pointer;
}
.check input::after {
  content: ""; width: 11px; height: 6px; border-left: 2.5px solid var(--badge-ink); border-bottom: 2.5px solid var(--badge-ink);
  transform: translateY(-1px) rotate(-45deg); opacity: 0;
}
.check input:checked { background: var(--badge); border-color: var(--badge); }
.check input:checked::after { opacity: 1; }
.check:has(input:checked) > span { opacity: .5; }
.reset {
  justify-self: start; margin-top: 4px; font: 600 13px var(--font); color: var(--muted); background: var(--surface);
  border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px; cursor: pointer;
}
.reset:hover { color: var(--ink); border-color: var(--faint); }
.check-group { margin-bottom: 40px; }
.check-group h2 a { color: inherit; text-decoration: none; }
.check-group h2 a:hover { text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 4px; text-underline-offset: 4px; }

/* 100 headlines */
.src-line { color: var(--muted); font-size: 15px; margin: 0; }
.headlines {
  list-style: none; margin: 18px 0 0; padding: 0;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.headlines li { display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: baseline; padding: 13px 18px; color: var(--ink); font-size: 17px; font-weight: 600; line-height: 1.45; letter-spacing: -.005em; }
.headlines li + li { border-top: 1px solid var(--line); }
.hn { font-size: 13px; font-weight: 700; color: var(--faint); font-variant-numeric: tabular-nums; }

/* next / previous */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 56px; }
.pager a {
  display: flex; flex-direction: column; gap: 2px; padding: 14px 18px; border-radius: 14px;
  background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow);
  color: var(--ink); text-decoration: none; font-weight: 700; font-size: 15.5px;
}
.pager a:hover { border-color: var(--faint); }
.pager a span { font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--faint); }
.pager .next { text-align: right; grid-column: 2; }

/* footer */
.foot { margin-top: 64px; padding-top: 22px; padding-bottom: 44px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--muted); }
.foot mark { font-weight: 600; }