/* The pages that fork off the front door: writing, the essays, the two doors.
   Paper pages in the edition's own type, one bar and one foot shared with index.html. */
html.page { --rail: 0px; scroll-behavior: smooth; }
html.page body { background: var(--ground); color: var(--dark); }
.page-wrap { position: relative; }
.page-main { position: relative; padding-top: var(--nav-h); }
.page .col { width: min(100% - 2 * var(--gutter), 1120px); margin-inline: auto; }
@media (min-width: 940px) { .page .col { width: min(100% - 64px, 1120px); } }
.page footer { padding-left: var(--gutter); }
@media (min-width: 940px) { .page footer { padding-inline: 32px; } }
html.page .nav { color: var(--black); }
html.page[data-scrolled-page] .nav { background: var(--ground); }
html.page .nav .pill { background: var(--black); color: var(--white); }
html.page .nav .pill:hover { background: #2a2a2a; }

/* ---- shared editorial pieces */
.page .eyebrow { color: var(--grey-dark); }
.page .dek { margin-top: 18px; max-width: 46ch; color: var(--dark); }
.page .byline { margin-top: 14px; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 17px; color: var(--grey-dark); }
.page .kicker { font-family: var(--mont); font-weight: 600; font-size: 13px; letter-spacing: -.01em; color: var(--black); }
.page .ptitle { margin: 12px 0 0; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: clamp(1.7rem, 1rem + 1.7vw, 2.6rem); line-height: 1.04; letter-spacing: -.02em; text-wrap: pretty; }
.page .ptitle a { color: var(--black); text-decoration: none; }
.page .ptitle a:hover { text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 1px; }
.page .pdek { margin: 10px 0 0; font-family: var(--mont); font-weight: 500; font-size: 15px; line-height: 1.35; color: var(--grey-dark); max-width: 60ch; }
.page .answer { margin: 0; max-width: 34ch; }
.page .cta { color: var(--black); border-color: var(--black); }

/* ---- the writing index */
.index-head { padding: 72px 0 36px; border-bottom: 1px solid var(--line); }
@media (min-width: 940px) { .index-head { padding: 110px 0 44px; } }
.index-head .headline-1 { font-size: clamp(3.2rem, 2rem + 6vw, 7rem); }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 36px; }
.filter { font: 500 13px/1 var(--mont); letter-spacing: -.01em; color: var(--black); background: transparent; border: 1px solid var(--line); border-radius: 4px; padding: 10px 14px; cursor: pointer; transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease); }
.filter:hover { border-color: var(--black); }
.filter.is-on { background: var(--black); color: var(--white); border-color: var(--black); }
.index-list { padding-bottom: 96px; }
.posts { list-style: none; margin: 0; padding: 0; }
.posts .post { display: grid; grid-template-columns: 1fr; gap: 6px 32px; padding: 30px 0; border-bottom: 1px solid var(--line); }
.posts .post[hidden] { display: none; }
@media (min-width: 769px) { .posts .post { grid-template-columns: 3fr 9fr; } .posts .post .meta { grid-column: 1; align-content: start; } .posts .post .ptitle, .posts .post .pdek { grid-column: 2; } .posts .post .ptitle { margin-top: 0; } }
.posts .meta { display: flex; gap: 14px; align-items: baseline; }
.posts .mins { font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 15px; color: var(--grey-dark); }
.posts .post.lead { padding-top: 40px; }
.posts .post.lead .art { grid-column: 1 / -1; display: block; aspect-ratio: 1344 / 756; overflow: hidden; background: var(--black); margin-bottom: 18px; }
.posts .post.lead .art img { display: block; width: 100%; height: 100%; object-fit: cover; }
.posts .post.lead .ptitle { font-size: clamp(2.2rem, 1.2rem + 2.6vw, 3.8rem); }

/* ---- an essay */
.doc-head { padding: 64px 0 28px; }
@media (min-width: 940px) { .doc-head { padding: 100px 0 36px; } }
.doc-head .headline-1 { max-width: 20ch; font-size: clamp(2.6rem, 1.6rem + 4vw, 5.6rem); margin-top: 18px; }
.doc-art { margin: 8px 0 0; }
.doc-art img { display: block; width: 100%; height: auto; aspect-ratio: 1344 / 756; object-fit: cover; background: var(--black); }
.doc-col { padding: 48px 0 24px; }
@media (min-width: 940px) { .doc-col { padding: 72px 0 24px; } }
.doc .answer { max-width: 30ch; }
.doc .body { margin-top: 40px; max-width: 64ch; font-family: var(--cigars); font-weight: 500; font-size: clamp(19px, 1rem + .45vw, 22px); line-height: 1.42; color: var(--dark); }
.doc .body p { margin: 0 0 1.15em; }
.doc .body h2 { margin: 2.2em 0 .6em; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: clamp(1.7rem, 1rem + 1.6vw, 2.4rem); line-height: 1.05; letter-spacing: -.02em; color: var(--black); }
.doc .body strong { font-family: var(--cigars); font-style: italic; font-weight: 600; font-size: 1em; letter-spacing: -.01em; color: var(--black); }   /* run-in heads in the body's own face: a bold sans inside the serif read as a second voice */
.doc .body a { color: var(--black); text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.doc .body ul { list-style: none; margin: 0 0 1.4em; padding: 0; border-top: 1px solid var(--line); }
.doc .body li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.doc .body figure, .doc .body .fig { margin: 2em 0; }
.doc .body img { display: block; width: 100%; height: auto; background: var(--black); }
.doc .body figcaption { margin-top: 10px; font-family: var(--mont); font-weight: 500; font-size: 13px; color: var(--grey-dark); }
.doc .faq { margin-top: 56px; max-width: 64ch; }
.doc .faq .rows { margin: 16px 0 0; border-top: 1px solid var(--line); }
.doc .faq .row { display: grid; grid-template-columns: 1fr; gap: 8px 32px; padding: 20px 0; border-bottom: 1px solid var(--line); }
@media (min-width: 769px) { .doc .faq .row { grid-template-columns: 5fr 7fr; } }
.doc .faq dt { font-family: var(--mont); font-weight: 600; font-size: 15px; letter-spacing: -.01em; color: var(--black); }
.doc .faq dd { margin: 0; font-family: var(--cigars); font-weight: 500; font-size: 18px; line-height: 1.35; color: var(--dark); }
.doc-cta { margin: 56px 0 40px; padding: 28px 0; border-top: 1px solid var(--black); border-bottom: 1px solid var(--black); max-width: 64ch; }
.doc-cta .narrative-2 { margin: 0; max-width: 46ch; }
.doc-cta a { font-family: var(--mont); font-weight: 600; font-size: .78em; color: var(--black); text-decoration: none; white-space: nowrap; }
.doc-cta a:hover { text-decoration: underline; text-underline-offset: 4px; }
.doc-more { padding: 56px 0 96px; border-top: 1px solid var(--line); }
.doc-more .ptitle { margin-top: 10px; max-width: 24ch; }
.doc-more .cta { margin-top: 26px; }

/* ---- the doors: engineers, companies */
.door-head { padding: 64px 0 28px; }
@media (min-width: 940px) { .door-head { padding: 100px 0 40px; } }
.door-head .headline-1 { max-width: 20ch; font-size: clamp(2.4rem, 1.4rem + 3.8vw, 5.2rem); margin-top: 18px; text-wrap: balance; }
.door .jump { margin-top: 32px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.door .jump-note { font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 17px; color: var(--grey-dark); }
.door-col { padding: 40px 0 8px; }
@media (min-width: 940px) { .door-col { padding: 56px 0 8px; } }
.door .answer { max-width: 40ch; }
.door .door-steps { margin-top: 48px; border-top: 1px solid var(--line); }
.door .step { display: grid; grid-template-columns: 1fr; gap: 12px 32px; padding: 30px 0; border-bottom: 1px solid var(--line); }
@media (min-width: 769px) { .door .step { grid-template-columns: 5fr 7fr; } }
.door .step h2 { margin: 0; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: clamp(1.6rem, 1rem + 1.5vw, 2.3rem); line-height: 1.05; letter-spacing: -.02em; color: var(--black); }
.door .step p { margin: 0 0 .9em; font-family: var(--cigars); font-weight: 500; font-size: clamp(18px, 1rem + .35vw, 20px); line-height: 1.4; color: var(--dark); }
.door .step p:last-child { margin-bottom: 0; }
.door .close { margin: 56px 0 0; max-width: 30ch; }
.contact { margin-top: 72px; padding: 56px 0 96px; background: var(--black); color: var(--light); }
.contact .headline-6 { color: var(--light); }
.contact .note { color: rgba(247, 247, 238, .72); margin-top: 12px; }
.contact-form { margin-top: 36px; max-width: 760px; }
.cfield-row { display: grid; grid-template-columns: 1fr; gap: 0 32px; }
@media (min-width: 640px) { .cfield-row { grid-template-columns: 1fr 1fr; } }
.cfield { display: grid; gap: 8px; padding: 18px 0 20px; border: 0; margin: 0; }
.cfield label, .cfield legend { font-family: var(--mont); font-weight: 600; font-size: 13px; letter-spacing: -.01em; color: rgba(247, 247, 238, .85); }
.cfield input, .cfield textarea, .cfield select { width: 100%; font: 500 17px/1.3 var(--cigars); color: var(--light); background: transparent; border: 0; border-bottom: 1px solid rgba(247, 247, 238, .35); border-radius: 0; padding: 8px 0 10px; outline: none; transition: border-color .25s var(--ease); }
.cfield textarea { resize: vertical; min-height: 2.6em; }
.cfield select { appearance: none; -webkit-appearance: none; cursor: pointer; }
.cfield select option { color: var(--black); }
.cfield input::placeholder, .cfield textarea::placeholder { color: rgba(247, 247, 238, .4); font-style: italic; }
.cfield input:focus, .cfield textarea:focus, .cfield select:focus { border-bottom-color: var(--light); }
.cfield-divider { margin: 28px 0 4px; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 17px; color: rgba(247, 247, 238, .6); }
.cfield-set legend { margin-bottom: 8px; }
.cchecks { display: flex; flex-wrap: wrap; gap: 8px; }
.cchecks label { display: inline-flex; align-items: center; gap: 8px; font: 500 13px/1 var(--mont); color: var(--light); border: 1px solid rgba(247, 247, 238, .4); border-radius: 4px; padding: 9px 12px; cursor: pointer; transition: background-color .25s var(--ease), border-color .25s var(--ease); }
.cchecks label:has(input:checked) { background: var(--light); color: var(--black); border-color: var(--light); }
.cchecks input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.contact-send { margin-top: 28px; border: 0; cursor: pointer; }
.contact-status { margin: 16px 0 0; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 17px; color: rgba(247, 247, 238, .8); min-height: 1.4em; }
.contact-status.err { color: #f0b8a8; }

/* ---- the doors, flow first: one question at a time, as on the live site; the argument and the common questions beside and below */
.door-top { padding: 48px 0 48px; border-bottom: 1px solid var(--line); }
@media (min-width: 940px) { .door-top { padding: 84px 0 64px; } }
.door-grid { display: grid; grid-template-columns: 1fr; gap: 48px 72px; }
@media (min-width: 940px) { .door-grid { grid-template-columns: 7fr 5fr; align-items: start; } }
.flow-host { min-height: 340px; }
html[data-apply-flow] .fallback { display: none; }
.flow .rail { height: 1px; background: var(--line); position: relative; overflow: hidden; max-width: 560px; }
.flow .rail i { position: absolute; inset: 0; background: var(--black); transform-origin: 0 50%; transition: transform .5s var(--ease); }
.flow .count { margin: 26px 0 0; display: flex; align-items: baseline; gap: 12px; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 16px; color: var(--grey-dark); }
.flow .count b { font-weight: 500; color: var(--black); }
.flow .optional { font-family: var(--mont); font-style: normal; font-weight: 500; font-size: 12px; color: var(--grey-dark); }
.flow .q { margin: 14px 0 0; font-family: var(--cigars); font-weight: 500; font-size: clamp(2rem, 1.2rem + 2.6vw, 3.6rem); line-height: 1.02; letter-spacing: -.02em; color: var(--black); text-wrap: balance; max-width: 18ch; }
.flow .help { margin: 14px 0 0; font-family: var(--mont); font-weight: 500; font-size: 15px; line-height: 1.35; color: var(--grey-dark); max-width: 48ch; }
.flow .input { display: block; width: 100%; max-width: 560px; margin-top: 28px; font: 500 clamp(20px, 1rem + .8vw, 26px)/1.3 var(--cigars); color: var(--black); background: transparent; border: 0; border-bottom: 1px solid var(--black); border-radius: 0; padding: 8px 0 12px; outline: none; }
.flow .input::placeholder { color: rgba(0, 0, 0, .35); font-style: italic; }
.flow textarea.input { resize: vertical; min-height: 3.2em; }
.flow select.input { appearance: none; -webkit-appearance: none; cursor: pointer; }
.flow .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; max-width: 620px; }
.flow .chip { font: 500 13px/1 var(--mont); letter-spacing: -.01em; color: var(--black); background: transparent; border: 1px solid var(--line); border-radius: 4px; padding: 10px 14px; cursor: pointer; transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease); }
.flow .chip:hover { border-color: var(--black); }
.flow .chip[data-on] { background: var(--black); color: var(--white); border-color: var(--black); }
.flow .acts { display: flex; align-items: center; gap: 20px; margin-top: 32px; flex-wrap: wrap; }
.flow .go { border: 0; cursor: pointer; background: var(--black); color: var(--white); }
.flow .go:disabled { opacity: .3; cursor: default; }
.flow .skip, .flow .back { background: none; border: 0; padding: 0; font: 500 14px/1 var(--mont); color: var(--grey-dark); cursor: pointer; }
.flow .skip:hover, .flow .back:hover { color: var(--black); text-decoration: underline; text-underline-offset: 3px; }
.flow .err { margin: 16px 0 0; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 17px; color: #8a2a1a; }
.flow .read { margin: 40px 0 0; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 17px; color: var(--grey-dark); }
.flow .read a { color: inherit; }
.door-rail .terms { margin: 0; color: var(--dark); max-width: 40ch; }
.door-rail .faq { margin-top: 32px; }
.door-rail .faq .rows { margin: 12px 0 0; border-top: 1px solid var(--line); }
.door-rail .faq .row { padding: 16px 0; border-bottom: 1px solid var(--line); display: grid; gap: 6px; }
.door-rail .faq dt { font-family: var(--mont); font-weight: 600; font-size: 14px; letter-spacing: -.01em; color: var(--black); }
.door-rail .faq dd { margin: 0; font-family: var(--cigars); font-weight: 500; font-size: 17px; line-height: 1.35; color: var(--dark); }
.door-why { padding: 64px 0 96px; }
@media (min-width: 940px) { .door-why { padding: 90px 0 120px; } }
.door-why .headline-1 { max-width: 20ch; font-size: clamp(2.2rem, 1.2rem + 3.4vw, 4.6rem); margin-top: 18px; text-wrap: balance; }
.door-why .door-col { padding-top: clamp(56px, 2rem + 4vw, 104px); }   /* the answer starts its own block, well clear of the dek */
/* the opening paragraph is a lead, a step under the title and its dek: at display size an essay opened on eleven lines and a door's answer outsized its dek */
.doc .answer.narrative-1, .door-why .answer.narrative-1 { font-size: clamp(23px, 1rem + .9vw, 30px); line-height: 1.1; }
.doc .answer { max-width: 47ch; }   /* the width of the body column under it */
.door-why .answer { max-width: 44ch; }
.door-why .doc-cta { margin-top: 56px; }
/* the document's own form, shown only without JavaScript, on the paper */
.fallback .note { margin-top: 10px; }
.fallback .contact-form { margin-top: 28px; }
.fallback .cfield label, .fallback .cfield legend { color: var(--black); }
.fallback .cfield input, .fallback .cfield textarea, .fallback .cfield select { color: var(--black); border-bottom-color: var(--line); }
.fallback .cfield input::placeholder, .fallback .cfield textarea::placeholder { color: rgba(0, 0, 0, .35); }
.fallback .cfield-divider { color: var(--grey-dark); }
.fallback .cchecks label { color: var(--black); border-color: var(--line); border-radius: 4px; }
.fallback .cchecks label:has(input:checked) { background: var(--black); color: var(--white); border-color: var(--black); }
.fallback .contact-send { background: var(--black); color: var(--white); }
.fallback .contact-status { color: var(--grey-dark); }
.fallback .after { margin-top: 20px; font-family: var(--cigars); font-style: italic; font-weight: 500; font-size: 16px; color: var(--grey-dark); max-width: 52ch; }

/* the headline's descenders hang below its trimmed box, so the line under a display headline keeps its distance */
.index-head .dek { margin-top: clamp(26px, 1rem + 1.8vw, 46px); }
.doc-head .dek, .door-why .dek { margin-top: clamp(22px, .8rem + 1.2vw, 38px); }

/* card: how an essay photographs itself for a link preview (1200x630, ?card): its head on the left, its own art filling the right */
html.card body { overflow: hidden; }
html.card .doc { display: grid; grid-template-columns: 1fr 1fr; height: calc(100vh - var(--nav-h)); }
html.card .doc-head { grid-column: 1; padding: 44px 36px 0 32px; }
html.card .doc-head .col { width: auto; margin: 0; }
html.card .doc-head .headline-1 { font-size: 54px; max-width: none; margin-top: 14px; }
html.card .doc-head .dek { margin-top: 22px; font-size: 21px; max-width: 34ch; }
html.card .doc-art { grid-column: 2; grid-row: 1; margin: 0; }
html.card .doc-art .col { width: 100%; height: 100%; }
html.card .doc-art img { height: 100%; aspect-ratio: auto; object-fit: cover; }
html.card .doc-col, html.card .doc-more, html.card footer, html.card .side { display: none; }

/* v12.49: the hand on the pages. A question's lines arrive one after another; the rail's fill glides; an essay carries a reading line under the bar; a post's title leans as it is hovered */
.flow .stage > * { animation: flow-in .55s var(--ease-out) both; }
.flow .stage > :nth-child(2) { animation-delay: 50ms; } .flow .stage > :nth-child(3) { animation-delay: 100ms; } .flow .stage > :nth-child(4) { animation-delay: 150ms; } .flow .stage > :nth-child(5) { animation-delay: 200ms; } .flow .stage > :nth-child(6) { animation-delay: 250ms; }
@keyframes flow-in { from { opacity: 0; translate: 0 10px; } }
@media (prefers-reduced-motion: reduce) { .flow .stage > * { animation: none; } }
.flow .rail { margin-bottom: 0; }
.read-line { position: fixed; left: 0; top: var(--nav-h); width: 100%; height: 1px; background: var(--black); transform: scaleX(var(--rp, 0)); transform-origin: 0 50%; z-index: 9998; pointer-events: none; opacity: 0; transition: opacity .35s var(--ease); }
html[data-reading] .read-line { opacity: 1; }
@media (hover: hover) { .posts .post:hover .ptitle { translate: 4px 0; } .posts .post.lead .art img { transition: scale 1.4s var(--ease-out); } .posts .post.lead:hover .art img { scale: 1.03; } }

/* the door's own heading, above the first question */
.door-h1 { margin: 0 0 28px; }