/* ==========================================================================
   Vietnamese-Illini Math Guy — site styles
   One stylesheet for every page. Edit here once, it applies everywhere.
   ========================================================================== */

/* ---- Colour tokens: light (default) ---- */
:root {
  --bg:        #f7f4ec;
  --surface:   #fcfaf5;
  --text:      #192d35;
  --muted:     #536369;
  --faint:     #647378;
  --border:    #d8d9cf;
  --link:      #b64926;
  --link-hover:#913719;
  --accent:    #b64926;   /* vivid blue */
  --accent-soft: #f1e5da;
  --deep:      #192d35;   /* deep navy   */
  --shadow:    0 1px 2px rgba(11,47,102,.06), 0 10px 28px rgba(11,47,102,.09);

  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, "Times New Roman", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --measure: 44rem;      /* comfortable reading width */
  --wide:    62rem;      /* header / footer width     */
  --gutter:  1.25rem;
}

/* ---- Colour tokens: dark ---- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #191f23;
    --surface:   #222b30;
    --text:      #eeeae0;
    --muted:     #b1bebc;
    --faint:     #a4b3b2;
    --border:    #394549;
    --link:      #ffa780;
    --link-hover:#ffc4a8;
    --accent:    #ffa780;
    --accent-soft: #383029;
    --deep:      #eeeae0;
    --shadow:    0 1px 2px rgba(0,0,0,.35), 0 8px 24px rgba(0,0,0,.32);
  }
}
:root[data-theme="dark"] {
  --bg:        #191f23;
  --surface:   #222b30;
  --text:      #eeeae0;
  --muted:     #b1bebc;
  --faint:     #a4b3b2;
  --border:    #394549;
  --link:      #ffa780;
  --link-hover:#ffc4a8;
  --accent:    #ffa780;
  --accent-soft: #383029;
  --deep:      #eeeae0;
  --shadow:    0 1px 2px rgba(0,0,0,.35), 0 8px 24px rgba(0,0,0,.32);
}

/* ---- Base ---- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  padding-bottom: var(--footer-h, 4.75rem);   /* reserve space above the fixed footer */
}

img { max-width: 100%; height: auto; }

a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--link-hover); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--surface); color: var(--text);
  padding: .6rem 1rem; z-index: 100; border-radius: 0 0 6px 0;
}
.skip:focus { left: 0; }

/* ---- Header / navigation ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.6) blur(10px);
  -webkit-backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header::after {            /* thin accent-blue rule */
  content: ""; display: block; height: 2px; background: var(--accent);
  transform-origin: left; opacity: .9;
}

.bar {
  max-width: var(--wide);
  margin: 0 auto;
  padding-block: .7rem;
  padding-inline: var(--gutter);
  display: flex; align-items: center; gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--sans);
  font-weight: 650;
  font-size: .95rem;
  letter-spacing: -.005em;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
  display: inline-flex; align-items: baseline; gap: .5rem;
}
.brand:hover { color: var(--text); }
.brand .mark { color: var(--accent); font-weight: 800; }

nav.main { display: flex; gap: .15rem; flex-wrap: wrap; }
nav.main a {
  font-family: var(--sans);
  font-size: .875rem;
  color: var(--muted);
  text-decoration: none;
  padding: .35rem .6rem;
  border-radius: 6px;
  white-space: nowrap;
}
nav.main a:hover { color: var(--text); background: color-mix(in srgb, var(--text) 7%, transparent); }
nav.main a[aria-current="page"] { color: var(--text); font-weight: 600; }
nav.main a[aria-current="page"]::after {
  content: ""; display: block; height: 2px; margin-top: 2px;
  background: var(--accent); border-radius: 2px;
}

.theme-toggle {
  font-family: var(--sans); font-size: .8rem;
  background: transparent; color: var(--muted);
  border: 1px solid var(--border); border-radius: 6px;
  padding: .3rem .55rem; cursor: pointer; line-height: 1;
}
.theme-toggle:hover { color: var(--text); border-color: var(--faint); }

/* ---- Layout ---- */
main { display: block; }

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding-inline: var(--gutter);
  padding-block: 3rem 4rem;
}
.wrap--wide  { max-width: var(--wide); }
.wrap--hero  { padding-block: 2.5rem 1rem; }
.wrap--tight { padding-block: 0 4rem; }
.wrap--tight > h2:first-child { margin-top: 1.2rem; }

/* ---- Headings ---- */
h1, h2, h3, h4 { line-height: 1.25; letter-spacing: -.012em; font-weight: 650; }

h1 {
  font-size: clamp(1.85rem, 1.35rem + 2vw, 2.6rem);
  margin: 0 0 .4em;
}
h2 {
  font-size: clamp(1.25rem, 1.1rem + .7vw, 1.5rem);
  margin: 2.6rem 0 .7rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
}
h3 { font-size: 1.125rem; margin: 1.9rem 0 .5rem; }

/* Section eyebrow, used for CONTACT / BIOGRAPHY style labels */
.eyebrow {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 .5rem;
}

.lede { font-size: 1.15rem; color: var(--muted); margin-top: 0; }

p { margin: 0 0 1.15em; }
p:last-child { margin-bottom: 0; }

hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

blockquote {
  margin: 1.5rem 0;
  padding-left: 1.1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

code { font-family: var(--mono); font-size: .9em; }

/* ---- Full-width banner strip (home) ---- */
.banner {
  position: relative;
  height: clamp(150px, 22vw, 280px);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.banner img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 52%;   /* keeps the sky and the treeline in frame */
  display: block;
}
.banner::after {                 /* fade the photo into the page background */
  content: "";
  position: absolute; inset: auto 0 0 0; height: 35%;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}

/* ---- Home hero ---- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  padding-block: 1rem 0;
}
.portrait {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: var(--surface);
  aspect-ratio: 4 / 5;
  max-width: 100%;
}
.portrait img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Shown only until a photo is dropped in at assets/img/profile.jpg */
.portrait.is-empty {
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 120% at 30% 0%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 60%),
    var(--surface);
}
.portrait.is-empty::before {
  content: attr(data-monogram);
  font-family: var(--serif);
  font-size: 2.4rem;
  font-weight: 650;
  letter-spacing: .06em;
  color: color-mix(in srgb, var(--accent) 75%, var(--text));
}

.hero h1 { margin-bottom: .35em; }
.hero .tagline { color: var(--muted); font-size: 1.1rem; margin-bottom: 1.6rem; }

.actions { display: flex; flex-wrap: wrap; gap: .6rem; }

.btn {
  font-family: var(--sans); font-size: .9rem; font-weight: 550;
  display: inline-block;
  padding: .55rem 1.1rem;
  border-radius: 7px;
  text-decoration: none;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  transition: transform .12s ease, filter .12s ease;
}
.btn:hover { color: #fff; filter: brightness(1.06); transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { color: var(--text); border-color: var(--accent); }

/* ---- Cards & lists ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.2rem 1.3rem;
  margin: 1.1rem 0;
}

/* ---- Biography with a photo beside it (about page) ---- */
.bio {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 13rem);
  gap: clamp(1.25rem, 3vw, 2.25rem);
  align-items: start;
}
.bio-photo { margin: 0; }
.bio-photo img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: block;
}
.bio-photo figcaption {
  font-family: var(--sans); font-size: .78rem; color: var(--faint);
  margin-top: .5rem; text-align: center;
}

.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { margin: 0 0 .35rem; display: flex; gap: .7rem; flex-wrap: wrap; }
.contact-list li:last-child { margin-bottom: 0; }
.contact-list .label {
  font-family: var(--sans); font-size: .74rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--faint); min-width: 5rem; padding-top: .28em;
}
.contact-list .value { flex: 1 1 14rem; min-width: 0; overflow-wrap: anywhere; line-height: 1.45; }

/* Publication entries */
.pub { margin: 0 0 1.4rem; padding-left: 1.6rem; position: relative; }
.pub::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: .5rem; height: .5rem; border-radius: 50%;
  background: var(--accent);
}
.pub .title { font-weight: 650; }
.pub .venue { color: var(--muted); }
.pub .tags { margin-top: .35rem; display: flex; gap: .45rem; flex-wrap: wrap; }

.pill {
  font-family: var(--sans); font-size: .74rem; font-weight: 600;
  letter-spacing: .02em;
  padding: .16rem .55rem;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}
a.pill:hover { color: #fff; background: var(--accent); border-color: var(--accent); }

/* Post / link listing */
.entries { list-style: none; margin: 1.2rem 0 0; padding: 0; }
.entries > li { padding: 1.05rem 0; border-top: 1px solid var(--border); }
.entries > li:last-child { border-bottom: 1px solid var(--border); }
.entry-title {
  font-size: 1.1rem; font-weight: 650; line-height: 1.35;
  display: block; text-decoration: none; color: var(--text);
  margin-bottom: .3rem;
}
.entry-title:hover { color: var(--accent); }
.entry-meta {
  font-family: var(--sans); font-size: .8rem; color: var(--faint);
  display: flex; gap: .55rem; flex-wrap: wrap; align-items: center;
}
.entry-meta .dot { opacity: .5; }
.entry-note { color: var(--muted); margin: .4rem 0 0; font-size: .98rem; }

/* Useful-links items */
.linklist { list-style: none; margin: 1.2rem 0 0; padding: 0; }
.linklist > li { padding: 1.1rem 0; border-top: 1px solid var(--border); }
.linklist > li:last-child { border-bottom: 1px solid var(--border); }
.linklist p { margin: 0 0 .35rem; }
.linklist .url {
  font-family: var(--sans); font-size: .86rem; overflow-wrap: anywhere;
}

/* ---- Collapsible section (was a Google Sites accordion) ---- */
details.fold {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  margin: 1.6rem 0;
  overflow: hidden;
}
details.fold > summary {
  cursor: pointer;
  list-style: none;
  padding: .95rem 1.2rem;
  font-family: var(--sans);
  font-size: .78rem; font-weight: 700;
  letter-spacing: .13em; text-transform: uppercase;
  color: var(--accent);
  display: flex; align-items: center; gap: .6rem;
}
details.fold > summary::-webkit-details-marker { display: none; }
details.fold > summary::after {
  content: "+"; margin-left: auto; font-size: 1.1rem; color: var(--faint);
  font-family: var(--sans); font-weight: 400; line-height: 1;
}
details.fold[open] > summary::after { content: "\2212"; }
details.fold > summary:hover { background: color-mix(in srgb, var(--text) 4%, transparent); }
details.fold .fold-body { padding: 0 1.2rem 1.2rem; }

/* ---- Article (blog post) ---- */
.post-header { margin-bottom: 2rem; }
.post-header h1 { margin-bottom: .35rem; }
.post-meta {
  font-family: var(--sans); font-size: .85rem; color: var(--faint);
  display: flex; gap: .55rem; flex-wrap: wrap; align-items: center;
}

.post-body { overflow-wrap: break-word; }
.post-body h2 { font-size: 1.3rem; }
.post-body figure { margin: 1.8rem 0; text-align: center; }
.post-body figure img {
  border-radius: 8px; border: 1px solid var(--border); background: #fff;
}
.post-body figcaption {
  font-family: var(--sans); font-size: .82rem; color: var(--faint); margin-top: .5rem;
}
.post-body ul, .post-body ol { padding-left: 1.35rem; }
.post-body li { margin-bottom: .4em; }

/* Long display equations should scroll, not overflow the page */
mjx-container[display="true"] { overflow-x: auto; overflow-y: hidden; padding-block: .3rem; }

.post-nav {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 3rem; padding-top: 1.4rem; border-top: 1px solid var(--border);
  font-family: var(--sans); font-size: .88rem;
}
.post-nav a { text-decoration: none; }
.post-nav a:hover { text-decoration: underline; }

.backlink {
  font-family: var(--sans); font-size: .85rem; color: var(--muted);
  text-decoration: none; display: inline-block; margin-bottom: 1.6rem;
}
.backlink:hover { color: var(--accent); }

/* ---- Notice box ---- */
.notice {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 8px 8px 0;
  padding: .9rem 1.1rem;
  font-size: .95rem;
  color: var(--muted);
  margin: 1.5rem 0;
}

/* ---- Footer: fixed to the bottom of the viewport, stays put on scroll ---- */
.site-footer {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 96%, var(--accent) 4%);
  box-shadow: 0 -4px 16px rgba(11,47,102,.08);
}
.site-footer .bar {
  padding-block: 1rem;
  font-family: var(--sans); font-size: .82rem; color: var(--faint);
  align-items: center;
}
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer .foot-links { display: flex; gap: .9rem; flex-wrap: wrap; margin-left: auto; }

/* ---- Small screens ---- */
@media (max-width: 640px) {
  body { font-size: 1.02rem; }
  .hero { grid-template-columns: 1fr; }
  .portrait { max-width: 13rem; aspect-ratio: 4 / 5; }
  .bar { padding-block: .6rem; gap: .4rem .5rem; }
  .brand { flex: 1 1 100%; margin-right: 0; margin-bottom: .1rem; }
  nav.main { margin-right: auto; gap: 0; }
  nav.main a { padding: .3rem .45rem; font-size: .83rem; }
  .theme-toggle { font-size: .75rem; padding: .25rem .45rem; }
  .wrap { padding-block: 2.2rem 3rem; }
  .wrap--hero  { padding-block: 1.8rem .5rem; }
  .wrap--tight { padding-block: 0 3rem; }
  .bio { grid-template-columns: 1fr; }
  .bio-photo { max-width: 13rem; margin-inline: auto; }
  .contact-list li { flex-direction: column; gap: .05rem; margin-bottom: .22rem; }
  .contact-list .label { padding-top: 0; }
  .contact-list .value { flex: none; }
  .site-footer .foot-links { margin-left: 0; }
  .site-footer .bar { flex-direction: column; align-items: flex-start; gap: .4rem; padding-block: .8rem; }
  body { --footer-h: 6.5rem; }   /* footer wraps to two lines on narrow screens */
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

@media print {
  .site-header, .site-footer, .post-nav, .theme-toggle, .backlink { display: none; }
  body { background: #fff; color: #000; }
  .wrap { padding: 0; max-width: none; }
}

/* Editorial refresh: shared navigation and the approved notebook homepage. */
body { padding-bottom: 0; }
h1, h2, h3, h4 { font-weight: 500; }
.site-header { position: relative; background: var(--bg); backdrop-filter: none; }
.site-header::after { display: none; }
.site-header .bar { padding-block: 1.25rem; gap: 1rem; }
.brand { font-weight: 500; font-size: .86rem; max-width: 13rem; line-height: 1.4; }
.brand .mark { font-family: var(--serif); font-size: 2.15rem; font-weight: 400; }
nav.main { align-items: center; gap: .15rem; }
nav.main a, .writing-menu summary { font-family: var(--sans); font-size: .75rem; padding: .4rem .45rem; }
.writing-menu { position: relative; font-family: var(--sans); color: var(--muted); }
.writing-menu summary { cursor: pointer; }
.writing-menu.is-current summary { color: var(--accent); }
.writing-links { position: absolute; top: calc(100% + .5rem); left: 0; min-width: 11.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: 5px; padding: .5rem; box-shadow: var(--shadow); z-index: 60; }
.writing-links a { display: block; }
.theme-toggle {
  display: inline-grid;
  place-items: center;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  transition: color .18s ease, background .18s ease;
}
.theme-toggle svg { display: block; }
.theme-toggle:hover {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--bg));
}
@media (pointer: coarse) {
  .theme-toggle { flex-basis: 44px; width: 44px; height: 44px; }
}
.site-footer { position: static; background: var(--bg); box-shadow: none; }
.site-footer .bar { padding-block: 1.5rem; font-size: .72rem; }
.btn { background: var(--text); border-color: var(--text); color: var(--bg); border-radius: 4px; font-size: .8rem; font-weight: 400; }
.btn:hover { color: var(--bg); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { color: var(--text); }
.home-page .wrap--hero { padding: 4rem 3.5rem 3.25rem; }
.home-page .hero { grid-template-columns: 1.25fr 1fr; gap: 3rem; padding: 0; }
.hero-kicker { font: .7rem/1.5 var(--mono); letter-spacing: .1rem; text-transform: uppercase; color: var(--accent); margin: 0 0 1.5rem; }
.home-page .hero h1 { font-size: clamp(3rem, 5.5vw, 4.4rem); line-height: 1.06; letter-spacing: -.15rem; margin: 0 0 1.5rem; }
.home-page .hero h1 em { color: var(--accent); font-weight: 400; }
.home-page .tagline { font: 1rem/1.6 var(--sans); max-width: 24rem; margin-bottom: 1.75rem; }
.home-page .actions { align-items: center; gap: 1.5rem; }
.hero-writing-link { font: .8rem/1.5 var(--sans); color: var(--text); text-decoration: none; }
.hero-photo { position: relative; padding: 0 15px 20px 0; max-width: 330px; width: 100%; margin: auto; }
.hero-photo::before { content: ''; position: absolute; inset: 18px 0 0 20px; background: color-mix(in srgb, var(--text) 6%, var(--bg)); border: 1px solid var(--border); border-radius: 130px 130px 8px 8px; }
.hero-photo img { position: relative; width: 100%; height: 340px; object-fit: cover; border-radius: 130px 130px 8px 8px; display: block; filter: saturate(.85); }
.hero-photo figcaption { position: absolute; right: -12px; bottom: 42px; background: var(--bg); border: 1px solid var(--border); padding: 12px 17px; transform: rotate(-5deg); font: .75rem/1.5 var(--mono); box-shadow: var(--shadow); }
.hero-photo figcaption span { color: var(--accent); }
.notebook-strip { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; max-width: var(--wide); margin: auto; padding: 1rem 3.5rem; border-block: 1px solid var(--border); font: .7rem/1.6 var(--mono); color: var(--muted); }
.notebook-strip span:first-child { color: var(--accent); }
.home-page .wrap--tight { max-width: var(--wide); padding: 2.75rem 3.5rem; }
.home-page h2 { border: 0; margin: 0; padding: 0; font-size: 1.8rem; }
.home-page .entries { counter-reset: writings; margin-top: .75rem; }
.home-page .entries > li { position: relative; padding: 1.25rem 2rem 1.25rem 2.3rem; border-top: 0; border-bottom: 1px solid var(--border); transition: background .18s; }
.home-page .entries > li::before { counter-increment: writings; content: counter(writings, decimal-leading-zero); position: absolute; top: 1.55rem; left: 0; font: .7rem/1 var(--mono); color: var(--accent); }
.home-page .entries > li::after { content: '↗'; position: absolute; right: 0; top: 1.2rem; pointer-events: none; }
.home-page .entries > li:hover { background: color-mix(in srgb, var(--accent) 4%, var(--bg)); }
.home-page .entry-title { font-size: 1.25rem; font-weight: 500; }
.home-page .entry-meta { font-size: .68rem; text-transform: uppercase; color: var(--muted); }
.home-page .wrap--tight > p { font: .8rem/1.5 var(--sans); }
@media (max-width: 900px) {
  .site-header nav.main { order: 3; flex-basis: 100%; }
  .site-header .brand { margin-right: auto; }
}
@media (max-width: 640px) {
  .site-header .brand { flex: 0 1 auto; margin-bottom: 0; }
  .site-header .bar { padding-block: .8rem; }
  nav.main a, .writing-menu summary { padding: .6rem .4rem; }
  .home-page .wrap--hero { padding: 2.25rem 1.5rem; }
  .home-page .hero { grid-template-columns: 1fr; gap: 2rem; }
  .home-page .hero h1 { font-size: 3rem; }
  .hero-photo { max-width: 270px; }
  .hero-photo img { height: 285px; }
  .notebook-strip { padding: 1rem 1.5rem; gap: .5rem; }
  .home-page .wrap--tight { padding: 2rem 1.5rem; }
  .site-footer .bar { align-items: flex-start; }
}
@media print {
  .home-page .hero { display: block; }
  .hero-photo, .notebook-strip, .actions { display: none; }
}
@media (max-width: 900px) {
  nav.main { position: relative; }
  .writing-menu { position: static; }
  .writing-links { top: calc(100% + .35rem); left: 0; max-width: 100%; }
}