:root {
  --hy4-paper: #fbf8ef;
  --hy4-rule: #c3d6e6;
  --hy4-margin-red: #d4574a;
  --hy4-pencil: #f2b632;
  --hy4-graphite: #2e3338;
  --hy4-coil: #9aa3ab;
  --hy4-sage: #5f8f6e;
  --hy4-desk: #e4dccb;
  --hy4-ink-soft: #545c63;
}

html { font-size: 106.25%; }
body.hy4-desk { margin: 0; background: var(--hy4-desk); color: var(--hy4-graphite); font-family: "Laila", Georgia, serif; line-height: 1.68; }

.hy4-book { display: flex; max-width: 1060px; margin: 2.2rem auto 3rem; box-shadow: 0 1.1rem 2.4rem rgba(46, 51, 56, .18); }
.hy4-coil { flex: 0 0 46px; background-color: #f1ece0; background-image: radial-gradient(circle at 23px 17px, var(--hy4-graphite) 0 6px, transparent 7px), radial-gradient(circle at 23px 17px, var(--hy4-coil) 0 10px, transparent 11px); background-size: 46px 34px; border-right: 1px solid #d8d0bd; }
.hy4-leaf { flex: 1 1 auto; min-width: 0; padding: 1.6rem 2.4rem 1.4rem 3.1rem; background-color: var(--hy4-paper); background-image: linear-gradient(90deg, transparent 2.05rem, var(--hy4-margin-red) 2.05rem, var(--hy4-margin-red) 2.15rem, transparent 2.15rem), repeating-linear-gradient(180deg, transparent 0 1.66rem, var(--hy4-rule) 1.66rem 1.72rem); }

.hy4-top { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; border-bottom: 3px double var(--hy4-graphite); padding-bottom: .5rem; margin-bottom: 1.4rem; }
.hy4-name { font-family: "Sniglet", "Trebuchet MS", sans-serif; font-weight: 800; font-size: 1.55rem; color: var(--hy4-graphite); text-decoration: none; letter-spacing: .01em; }
.hy4-tab { font-family: "Sniglet", "Trebuchet MS", sans-serif; font-size: .82rem; background: var(--hy4-pencil); padding: .15rem .7rem; border-radius: 0 .7rem .7rem 0; }

h1, h2 { font-family: "Sniglet", "Trebuchet MS", sans-serif; line-height: 1.2; }
h1 { font-weight: 800; font-size: 2.15rem; margin: .2rem 0 1rem; }
h2 { font-weight: 400; font-size: 1.32rem; margin: 1.9rem 0 .5rem; color: var(--hy4-sage); }
a { color: #2b5c88; text-underline-offset: .18em; }
a:hover { color: var(--hy4-margin-red); }

.hy4-motto { font-style: italic; color: var(--hy4-ink-soft); margin: 0; }
.hy4-lede { font-size: 1.12rem; max-width: 60ch; }

.hy4-plan { border: 2px solid var(--hy4-graphite); border-radius: .3rem; padding: .3rem 1.1rem 1rem; background: rgba(255, 255, 255, .62); margin: 1.6rem 0; }
.hy4-fields { display: grid; grid-template-columns: 8.5rem 1fr; gap: .45rem 1rem; margin: .4rem 0 0; }
.hy4-fields dt { font-family: "Sniglet", "Trebuchet MS", sans-serif; text-transform: uppercase; font-size: .78rem; letter-spacing: .08em; color: var(--hy4-margin-red); padding-top: .25rem; }
.hy4-fields dd { margin: 0; border-bottom: 1px dashed var(--hy4-coil); }

.hy4-lessons { list-style: none; counter-reset: none; padding: 0; margin: 0; }
.hy4-lessons li { padding: .7rem 0 .7rem 1rem; border-left: 5px solid var(--hy4-pencil); margin-bottom: .9rem; }
.hy4-lessons a { font-family: "Sniglet", "Trebuchet MS", sans-serif; font-size: 1.12rem; }
.hy4-lessons span { display: block; font-size: .76rem; text-transform: uppercase; letter-spacing: .1em; color: var(--hy4-ink-soft); }
.hy4-lessons p { margin: .25rem 0 0; }

.hy4-pocket ul { padding-left: 1.2rem; }
.hy4-pocket li { margin-bottom: .35rem; }
.hy4-owner { border-top: 1px solid var(--hy4-coil); margin-top: 2rem; }

.hy4-page { display: grid; grid-template-columns: 14.5rem minmax(0, 1fr); gap: 2rem; align-items: start; }
.hy4-margin { position: sticky; top: 1rem; font-size: .88rem; background: #fff6d8; border: 1px solid #e7d39b; padding: .8rem .9rem; transform: rotate(-1deg); }
.hy4-margin-head { font-family: "Sniglet", "Trebuchet MS", sans-serif; margin: 0 0 .4rem; color: var(--hy4-margin-red); }
.hy4-margin dl { margin: 0; }
.hy4-margin dt { font-weight: 600; margin-top: .45rem; }
.hy4-margin dd { margin: 0; color: var(--hy4-ink-soft); }
.hy4-number { font-family: "Sniglet", "Trebuchet MS", sans-serif; color: var(--hy4-sage); margin: 0; text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; }
.hy4-text { max-width: 68ch; }
.hy4-snap { margin: 1.2rem 0 1.4rem; padding: .55rem .55rem 0; background: #fff; box-shadow: 0 .3rem .9rem rgba(46, 51, 56, .16); }
.hy4-snap img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; background: #ece6d8; }
.hy4-snap figcaption { font-size: .85rem; color: var(--hy4-ink-soft); padding: .45rem .1rem .6rem; }

.hy4-slip { margin: 2.2rem 0 1.4rem; padding: .2rem 1.2rem 1rem; background: #fff; border: 2px solid var(--hy4-margin-red); border-radius: .2rem 1.2rem .2rem 1.2rem; }
.hy4-slip h2 { color: var(--hy4-margin-red); font-size: 1.12rem; }

.hy4-turn { display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; font-family: "Sniglet", "Trebuchet MS", sans-serif; font-size: .95rem; padding-top: .8rem; border-top: 1px solid var(--hy4-coil); }

.hy4-sheet { max-width: 64ch; }
.hy4-intro { font-size: 1.07rem; }
.hy4-months, .hy4-card { padding-left: 1.6rem; }
.hy4-months li, .hy4-card li { padding: .2rem 0; border-bottom: 1px solid var(--hy4-rule); }
.hy4-qa dt, .hy4-terms dt { font-weight: 600; margin-top: .8rem; }
.hy4-qa dd, .hy4-terms dd { margin: .1rem 0 0 1.2rem; }
.hy4-return { margin-top: 2rem; font-family: "Sniglet", "Trebuchet MS", sans-serif; }

.hy4-tail { margin-top: 2.6rem; padding-top: 1rem; border-top: 3px double var(--hy4-graphite); font-size: .86rem; color: var(--hy4-ink-soft); }
.hy4-tail-links { display: flex; flex-wrap: wrap; gap: .3rem .55rem; }

@media (max-width: 1170px) {
  .hy4-book { margin: 1.4rem 1.2rem 2.4rem; }
  .hy4-page { grid-template-columns: 12.5rem minmax(0, 1fr); gap: 1.5rem; }
}
@media (max-width: 730px) {
  .hy4-coil { flex-basis: 26px; background-size: 26px 30px; background-image: radial-gradient(circle at 13px 15px, var(--hy4-graphite) 0 4px, transparent 5px), radial-gradient(circle at 13px 15px, var(--hy4-coil) 0 7px, transparent 8px); }
  .hy4-leaf { padding: 1.2rem 1.1rem 1rem 2.2rem; }
  .hy4-page { grid-template-columns: 1fr; }
  .hy4-margin { position: static; transform: none; }
  .hy4-fields { grid-template-columns: 1fr; }
  h1 { font-size: 1.75rem; }
}
@media (max-width: 395px) {
  html { font-size: 100%; }
  .hy4-book { margin: .6rem .4rem 1.6rem; }
  .hy4-coil { display: block; flex-basis: 16px; }
  .hy4-leaf { padding-left: 1.6rem; background-image: repeating-linear-gradient(180deg, transparent 0 1.66rem, var(--hy4-rule) 1.66rem 1.72rem); }
}