/* marchtomay.net: one sheet of paper on a desk, index tabs at its edge, the reading marked with a
   highlighter. Written by tools/make_store_pages.py into assets/site.css. */
:root {
  --desk: #E7EAEF; --paper: #FFFFFF; --ink: #16181D; --ink-2: #424854; --rule: #D3D8E0;
  --pen: #2F5BE0; --graphite: #7A808C; --hl: #FFE45C; --hl-soft: #FFF1A6; --amber: #9A6B00;
  --tab-blue: #D9E5FF; --tab-blue-edge: #3D7BFF; --tab-pink: #FFDCE7; --tab-pink-edge: #FF5C8A;
  --tab-green: #D3F2E7; --tab-green-edge: #19B58A; --tab-orange: #FFE4CC; --tab-orange-edge: #FF8A3D;
  --tab-grey: #E5E7EB; --tab-grey-edge: #9CA3AF;
  --foot: #424854; --foot-link: #2F5BE0;
  --u: 8px;
  --tabw: 160px;
  --display: "Hahmlet", "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", serif;
  --text: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
  color-scheme: light;
}
/* In a dark room the desk goes dark; the sheet stays paper. */
@media (prefers-color-scheme: dark) {
  :root { --desk: #23262C; --foot: #D5D9E0; --foot-link: #A9BFFF; }
}
@font-face { font-family: "Pretendard"; font-weight: 400; font-display: swap;
  src: url("fonts/Pretendard-Regular.subset.woff2") format("woff2"); }
@font-face { font-family: "Pretendard"; font-weight: 600; font-display: swap;
  src: url("fonts/Pretendard-SemiBold.subset.woff2") format("woff2"); }
@font-face { font-family: "Pretendard"; font-weight: 700; font-display: swap;
  src: url("fonts/Pretendard-Bold.subset.woff2") format("woff2"); }
@font-face { font-family: "Hahmlet"; font-weight: 700; font-display: swap;
  src: url("fonts/Hahmlet-display.woff2") format("woff2"); }

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--desk); scroll-behavior: smooth; scroll-padding-top: calc(3 * var(--u));
  scrollbar-color: var(--graphite) var(--desk); }
::-webkit-scrollbar { width: 14px; height: 14px; background: var(--desk); }
::-webkit-scrollbar-thumb { background: var(--graphite); border: 4px solid var(--desk); border-radius: 7px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--desk); color: var(--ink); font-family: var(--text); font-size: 18px;
  line-height: 1.7; font-variant-numeric: tabular-nums; -webkit-text-size-adjust: 100%; }
::selection { background: var(--hl); color: var(--ink); }
a { color: var(--pen); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2.5px; }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 3px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { text-wrap: balance; }
.skiplink { position: absolute; left: var(--u); top: -60px; background: var(--ink); color: var(--paper); padding: var(--u) calc(2 * var(--u));
  border-radius: 6px; z-index: 10; text-decoration: none; }
.skiplink:focus { top: var(--u); }

/* ---------------------------------------------------------------- the sheet */
.desk { padding: calc(5 * var(--u)) calc(3 * var(--u)) calc(4 * var(--u)); }
.sheet { position: relative; max-width: 1180px; margin: 0 auto calc(2 * var(--u)) auto;
  margin-right: max(calc(var(--tabw) + 3 * var(--u)), calc((100% - 1180px) / 2)); background: var(--paper);
  border-radius: 4px; box-shadow: 0 1px 2px rgba(22, 24, 29, .08), 0 12px 32px -8px rgba(22, 24, 29, .18);
  padding: 32px 72px 48px; }
@media (min-width: 1500px) { .sheet { margin-left: auto; margin-right: auto; } }
.tabs { position: absolute; top: calc(12 * var(--u)); bottom: calc(4 * var(--u)); left: 100%; width: var(--tabw); }
.tabs-inner { position: sticky; top: calc(4 * var(--u)); display: flex; flex-direction: column; gap: var(--u); }
.tab { display: block; padding: var(--u) calc(2 * var(--u)) var(--u) calc(1.5 * var(--u)); border-radius: 0 10px 10px 0;
  border: 1.5px solid var(--edge); border-left: none; background: var(--fill); color: var(--ink); font-weight: 600;
  font-size: 16px; line-height: 1.4; text-decoration: none; transition: transform .2s cubic-bezier(.2, .8, .2, 1); }
.tab:hover { transform: translateX(4px); text-decoration: none; }
/* The page shown: its tab pulled further out of the sheet at the full tint of its edge. */
.tab[aria-current="page"] { font-weight: 700; background: var(--edge); color: var(--on-edge, var(--ink));
  width: calc(100% + 12px); }
.t-pen { --fill: var(--paper); --edge: var(--pen); --on-edge: var(--paper); }
.t-blue { --fill: var(--tab-blue); --edge: var(--tab-blue-edge); }
.t-pink { --fill: var(--tab-pink); --edge: var(--tab-pink-edge); }
.t-green { --fill: var(--tab-green); --edge: var(--tab-green-edge); }
.t-orange { --fill: var(--tab-orange); --edge: var(--tab-orange-edge); }
.t-grey { --fill: var(--tab-grey); --edge: var(--tab-grey-edge); }

.masthead { display: flex; align-items: center; justify-content: space-between; gap: calc(2 * var(--u));
  padding-bottom: calc(2 * var(--u)); border-bottom: 1px solid var(--rule); margin-bottom: calc(6 * var(--u)); }
.brand { display: flex; align-items: center; gap: calc(1.5 * var(--u)); color: var(--ink); text-decoration: none;
  font-weight: 700; font-size: 20px; }
.brand img { width: 40px; height: 40px; }
.brand .by { font-weight: 400; color: var(--ink-2); font-size: 16px; }
.lang { font-weight: 600; }

/* --------------------------------------------------------------------- type */
.display { font-family: var(--display); font-weight: 700; letter-spacing: -0.01em; }
h1.display { font-size: clamp(36px, 5.2vw, 62px); line-height: 1.22; margin: 0 0 calc(3 * var(--u)); max-width: 17em; }
h2.display { font-size: clamp(28px, 3.2vw, 38px); line-height: 1.3; margin: 0 0 calc(3 * var(--u)); }
h3 { font-size: 20px; line-height: 1.45; margin: 0 0 var(--u); }
p { margin: 0 0 calc(2 * var(--u)); }
.lede { font-size: 20px; max-width: 32em; color: var(--ink); }
.muted { color: var(--ink-2); }
mark { background: linear-gradient(transparent 12%, var(--hl) 12%, var(--hl) 88%, transparent 88%); color: inherit;
  padding: 0 .08em; box-decoration-break: clone; -webkit-box-decoration-break: clone; }

/* ------------------------------------------------------------------- the hero */
.hero { margin-bottom: calc(9 * var(--u)); }
.hero-row { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: calc(3 * var(--u)); margin-bottom: calc(5 * var(--u)); }
.hero-row .lede { margin: 0; }
.get { display: flex; flex-direction: column; align-items: flex-start; gap: var(--u); }
.btn { display: inline-flex; align-items: center; gap: var(--u); border-radius: 10px; font: inherit; font-weight: 700;
  cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--hl); color: var(--ink); border: 2px solid var(--amber); padding: calc(1.5 * var(--u)) calc(3 * var(--u));
  font-size: 19px; }
.btn-primary:hover { background: #FFEB85; text-decoration: none; }
.btn-primary svg { width: 22px; height: 22px; flex: none; }
.store-note { font-size: 16px; color: var(--ink-2); margin: 0; max-width: 18em; }
.store-note .nb { white-space: nowrap; }
.draft { display: inline-block; font-size: 15px; font-weight: 600; line-height: 1.5; color: var(--ink-2);
  border: 1.5px dashed var(--graphite); border-radius: 6px; padding: 0 8px; margin-right: 6px; }

/* the listening demo: the top of a real page, its parts outlined */
.demo { margin: 0; }
.demo-bar { display: flex; flex-wrap: wrap; align-items: center; gap: calc(2 * var(--u)); margin-bottom: calc(2 * var(--u)); }
.demo-bar .legend { display: flex; flex-wrap: wrap; gap: calc(2 * var(--u)); font-size: 16px; color: var(--ink-2); margin: 0; }
.swatch { display: inline-block; width: 30px; height: 16px; border-radius: 3px; vertical-align: -2px; margin-right: 6px;
  border: 2px solid var(--pen); background: var(--paper); }
.swatch.skip { border-style: dashed; border-color: var(--graphite); }
.play { min-width: 15em; justify-content: center; }
.play .t { font-variant-numeric: tabular-nums; font-weight: 600; }
.play[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.play .i-stop, .play[aria-pressed="true"] .i-play { display: none; }
.play[aria-pressed="true"] .i-stop { display: block; }
.page-frame { position: relative; margin: 0 auto; max-width: 860px; padding: 0 calc(10 * var(--u)); }
.page { position: relative; border: 1px solid var(--rule); box-shadow: 0 2px 4px rgba(22, 24, 29, .06),
  0 18px 40px -16px rgba(22, 24, 29, .22); background: var(--paper); }
.page img { width: 100%; }
.page::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 96px;
  background: linear-gradient(rgba(255, 255, 255, 0), var(--paper)); pointer-events: none; }
.blk { position: absolute; border-radius: 3px; border: 2px solid var(--pen); --p: 0; }
.blk.skip { border-style: dashed; border-color: var(--graphite); }
.blk::before { content: ""; position: absolute; inset: 0; background: var(--hl); mix-blend-mode: multiply;
  transform-origin: top; transform: scaleY(var(--p)); }
.blk.done::before { transform: scaleY(1); background: var(--hl-soft); }
.blk.now { border-width: 3px; }
.kind { position: absolute; transform: translateY(-2px); font-size: 14px; font-weight: 600; line-height: 1.3;
  padding: 2px 10px; background: var(--fill); border: 1.5px solid var(--edge); color: var(--ink); white-space: nowrap; }
.kind.l { right: calc(100% + 6px); border-radius: 8px 0 0 8px; }
.kind.r { left: calc(100% + 6px); border-radius: 0 8px 8px 0; }
.kind .len { font-weight: 400; color: var(--ink-2); margin-left: 4px; }
.demo figcaption { max-width: 860px; margin: calc(2 * var(--u)) auto 0; padding: 0 calc(10 * var(--u)); font-size: 16px;
  color: var(--ink-2); }

/* ------------------------------------------------------------------ sections */
section { margin-bottom: calc(10 * var(--u)); }
.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: calc(4 * var(--u)); }
.list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--u); }
.list li { border: 2px solid var(--pen); border-radius: 6px; padding: 12px 20px; }
.list.skip li { border-style: dashed; border-color: var(--graphite); }
.list b { font-weight: 700; }
.formula { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: calc(4 * var(--u)); align-items: start; }
.formula img { border: 1px solid var(--rule); border-radius: 4px; }
.said { margin: 0; padding: calc(2 * var(--u)) calc(3 * var(--u)); border-left: 0; background: #F6F7F9; border-radius: 6px;
  font-size: 19px; }
.said::before { content: attr(data-label); display: block; font-size: 15px; font-weight: 600; color: var(--ink-2); margin-bottom: 4px; }
.screens { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: calc(4 * var(--u)); }
.screens figure { margin: 0; }
.screens img { border: 1px solid var(--rule); border-radius: 6px; }
.screens figcaption { font-size: 16px; color: var(--ink-2); margin-top: var(--u); }
.specs { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: var(--u) calc(4 * var(--u)); margin: 0; }
.specs dt { font-weight: 700; }
.specs dd { margin: 0; }
.faq details { border-top: 1px solid var(--rule); padding: calc(1.5 * var(--u)) 0; }
.faq details:last-child { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; font-weight: 700; font-size: 19px; list-style-position: outside; margin-left: 20px; }
.faq summary::marker { color: var(--pen); }
.faq details p { margin: var(--u) 0 0 20px; }
.note { max-width: 40em; }
.seller { font-size: 16px; color: var(--ink-2); }
.site-foot { max-width: 1180px; margin: 0 auto; font-size: 15px; color: var(--foot); padding: 0 calc(1 * var(--u)); }
.site-foot a { color: var(--foot-link); }

/* --------------------------------------------------------- reading pages */
.doc h1.display { font-size: clamp(32px, 4vw, 44px); }
.doc main { max-width: 42em; }
.doc h2 { font-size: 21px; margin: calc(4 * var(--u)) 0 var(--u); }
.doc .meta { color: var(--ink-2); font-size: 16px; }

/* ----------------------------------------------------------------- narrow */
@media (max-width: 1180px) {
  .sheet { margin: 0 auto; padding: 24px 32px 40px; border-radius: 0 0 4px 4px; }
  .desk { padding-top: calc(7 * var(--u)); }
  .tabs { position: absolute; top: auto; bottom: 100%; left: calc(3 * var(--u)); right: calc(3 * var(--u)); width: auto; }
  .tabs-inner { position: static; flex-direction: row; flex-wrap: nowrap; overflow-x: auto; gap: 6px;
    scrollbar-width: none; }
  .tabs-inner::-webkit-scrollbar { display: none; }
  .tab { flex: none; }
  .tab { border-radius: 10px 10px 0 0; border: 1.5px solid var(--edge); border-bottom: none;
    padding: 6px calc(1.5 * var(--u)); font-size: 15px; }
  .tab:hover { transform: translateY(-3px); }
  .tabs-inner { align-items: flex-end; }
  .tab[aria-current="page"] { width: auto; padding-top: 14px; }
  .page-frame, .demo figcaption { padding: 0 calc(8 * var(--u)); }
}
@media (max-width: 760px) {
  .desk { padding: calc(7 * var(--u)) 0 calc(3 * var(--u)); }
  .sheet { padding: 24px 16px 32px; }
  .tabs { left: calc(1 * var(--u)); right: calc(1 * var(--u)); }
  .split, .formula, .screens { grid-template-columns: minmax(0, 1fr); }
  .page-frame, .demo figcaption { padding: 0; }
  .kind, .wide-only { display: none; }
  .lede { font-size: 18px; }
  .specs { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .specs dd { margin-bottom: var(--u); }
  .masthead { margin-bottom: calc(4 * var(--u)); }
  .site-foot { padding: 0 calc(2 * var(--u)); }
}
@media (prefers-reduced-motion: reduce) { .tab { transition: none; } }

/* Korean breaks between words, not inside them */
:lang(ko) { word-break: keep-all; overflow-wrap: break-word; }