/* v0.4 platform shell; KB 2.0 header and editorial footer rhythm. */
#shell { max-width: 1920px; min-height: 100vh; margin: auto; }
.site-header {
  position: sticky;
  z-index: 120;
  top: var(--header-inset);
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: var(--header-height);
  margin: var(--header-inset) var(--gutter) 0;
  padding: 7px calc(var(--section-padding) - 1px);
  border: 1px solid var(--line);
  border-radius:var(--radius);
  background: var(--lightgray);
}
.brand { display: flex; flex: none; align-items: center; gap: 10px; min-width: 0; font: 400 12px/1.4 var(--label-font); }
.brand .bracket { flex: none; font-size: 15px; }
.brand-full { white-space: nowrap; }
.brand-short, .account-short { display: none; }
.nav-top { display: flex; align-items: center; gap: clamp(11px, 2.2vw, 30px); margin-left: auto; }
.nav-top a, .nav-top button { border: 0; background: transparent; padding: 10px 0; font: 11px/1.45 var(--label-font); letter-spacing: .03em; text-transform: uppercase; }
.nav-top a:hover, .nav-top button:hover, .nav-top [aria-current="page"] { text-decoration: underline; text-underline-offset: 5px; }
.menu-control { display: grid; place-items: center; position:relative; isolation:isolate; flex: none; width: 40px; height: 40px; padding: 0; border: 0; border-radius:var(--radius); background: transparent; }
/* Author's editor comment: reduce the visible button by 30%, keep its hit area. */
.menu-control::before { content:""; position:absolute; inset:15%; z-index:-1; border:1px solid var(--ink); border-radius:var(--radius); }
.menu-control:hover::before { background: #dfe3e4; }
.menu-lines { display: grid; gap: 4px; width: 19px; transform:scale(.7); }
.menu-lines i { display: block; width: 100%; height: 2px; background: var(--ink); }
.header-account { flex: none; gap: 12px; min-height: 40px; padding: 10px 14px; font-size: 11px; white-space: nowrap; }
.mainframe { display: grid; grid-template-columns: 252px minmax(0, 1fr); gap: 12px; margin: 12px var(--gutter) 0; }
.mainframe.noside { grid-template-columns: 0 minmax(0, 1fr); column-gap: 0; }
.sidepanel {
  position: sticky;
  top: calc(var(--header-offset) + 14px);
  align-self: start;
  min-width: 0;
  height: calc(100dvh - var(--header-offset) - 28px);
  overflow: auto;
  border: 1px solid #d3d5d7;
  border-radius:var(--radius);
  background: var(--lightgray);
  scrollbar-width: thin;
}
.noside .sidepanel { visibility: hidden; overflow: hidden; border: 0; }
.side-inner { width: 100%; padding: 19px 15px 20px; }
.side-group-name { display: flex; align-items: center; gap: 9px; padding: 12px 10px 5px; color: #565c62; font: 11px/1.5 var(--label-font); letter-spacing: .02em; text-transform: uppercase; }
.side-group-name .num { color: #3e4244; }
.side-link { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 30px; padding: 6px 10px 6px 11px; border: 0; border-radius:var(--radius); background: transparent; color: #383d40; font-size: 13px; line-height: 1.25; text-align: left; }
.side-link:hover { background: #dee2e4; }
.side-link.active, .side-link[aria-current="page"] { background: var(--ink); color: var(--paper); }
.side-link .num { flex: none; width: 29px; font-size: 10px; }
.side-link .end { margin-left: auto; opacity: .7; }
.side-head { padding: 5px 10px; color: var(--body); font: 10px/1.5 var(--label-font); text-transform: uppercase; }
.side-section { margin: 12px 8px 0; padding-top: 4px; border-top: 1px solid #c4c8ca; }
.side-note { padding: 12px 10px 5px; color: var(--body); font-size: 11px; line-height: 1.52; }
.side-footer-link { margin-top: 14px; padding: 10px 10px 0; border-top: 1px solid #c4c8ca; font: 10px/1.6 var(--label-font); text-transform: uppercase; }
.side-close { display: none; }
.mobile-overlay { display: none; }
.content-area { min-width: 0; max-width: 100%; padding: 0; }
.content-area:focus { outline: none; }
.editorial-footer { margin: 56px var(--gutter) var(--gutter); padding: 0 var(--section-padding) 36px; border-radius:var(--radius); background: var(--lightgray); }
.footer-main { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, .68fr) minmax(0, 1fr); grid-template-areas: "identity nav contacts"; gap: clamp(32px, 3.5vw, 64px); padding: 56px 0 52px; }
.footer-identity { grid-area: identity; min-width: 0; }
.footer-navigation { grid-area: nav; min-width: 0; }
.footer-contacts { grid-area: contacts; min-width: 0; }
.footer-title { display: flex; align-items: baseline; gap: 14px; font: 500 17px/1.4 var(--label-font); letter-spacing: 0; text-wrap: initial; }
.footer-title > span:first-child { flex: none; font-size: 16px; }
.footer-description { max-width: 390px; margin-top: 25px; color: var(--body); font-size: 17px; line-height: 1.5; }
.footer-motto { margin-top: 25px; color: var(--body); font: 11px/1.6 var(--label-font); letter-spacing: .015em; text-transform: uppercase; }
.footer-label { margin: 0 0 17px; color: var(--body); font: 400 11px/1.5 var(--label-font); letter-spacing: .035em; text-transform: uppercase; }
.editorial-footer a { max-width: 100%; min-height: 44px; overflow-wrap: anywhere; }
.editorial-footer a:hover { text-decoration: underline; text-underline-offset: 5px; }
.footer-navigation a { display: flex; align-items: center; font-size: 17px; line-height: 1.3; }
.footer-email { display: inline-flex; align-items: center; font-size: clamp(25px, 2.25vw, 36px); line-height: 1.2; letter-spacing: -.045em; text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 8px; }
.footer-author-links { display: grid; gap: 2px; margin-top: 24px; }
.footer-author-links a { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; font-size: 14px; line-height: 1.45; }
.footer-author-links .chevron { width: 14px; height: 14px; }
.footer-legal { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) auto; gap: 24px; align-items: start; padding-top: 28px; border-top: 1px solid var(--line); color: var(--body); font-size: 13px; line-height: 1.7; }
.footer-top { display: inline-flex; align-items: center; justify-self: end; gap: 12px; margin-top: -10px; color: var(--ink); font: 11px/1.5 var(--label-font); letter-spacing: .02em; text-transform: uppercase; }
.footer-top .chevron { --chevron-angle: -90deg; width: 16px; height: 16px; }
@media (max-width: 1240px) {
  .mainframe { grid-template-columns: 220px minmax(0, 1fr); }
  .brand-full { font-size: 11px; }
}
@media (max-width: 1100px) {
  .footer-main { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); grid-template-areas: "identity contacts" "nav nav"; row-gap: 40px; }
  .footer-navigation { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
  .footer-label { grid-column: 1 / -1; }
  .footer-legal { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 22px; }
  .footer-top { grid-column: 2; margin-top: 0; }
}
@media (max-width: 1060px) {
  .site-header { gap: 14px; margin: 8px 8px 0; padding: 5px 16px; }
  .brand-full { max-width: 48vw; overflow: hidden; text-overflow: ellipsis; }
  .nav-top { display: none; }
  .header-account { min-height: 38px; margin-left: auto; padding: 8px 11px; }
  .mainframe, .mainframe.noside { display: block; margin: 8px; }
  .sidepanel {
    position: fixed;
    z-index: 155;
    top: 72px;
    bottom: 8px;
    left: 8px;
    width: min(300px, calc(100vw - 16px));
    height: auto;
    transform: translateX(calc(-100% - 25px));
    border: 1px solid var(--ink);
    box-shadow: 0 15px 28px #0003;
    overscroll-behavior: contain;
    transition: transform 200ms var(--ease), visibility 200ms;
  }
  .mainframe:not(.noside) .sidepanel { visibility: visible; transform: translateX(0); }
  .mainframe.noside .sidepanel { visibility: hidden; border: 1px solid var(--ink); }
  .side-inner { padding-top: 12px; }
  .side-close { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: calc(100% - 30px); min-height: 44px; margin: 14px 15px 0; padding: 8px 10px; border: 1px solid var(--line); border-radius:var(--radius); background: transparent; font: 11px/1.4 var(--label-font); text-transform: uppercase; }
  .side-link { min-height: 44px; }
  .mobile-overlay { position: fixed; z-index: 140; inset: 0; background: #0005; }
  .mainframe:not(.noside) .mobile-overlay { display: block; }
  .editorial-footer { margin-top: 45px; }
}
@media (max-width: 700px) {
  .editorial-footer { padding-bottom: 28px; }
  .footer-main { grid-template-columns: minmax(0, 1fr); grid-template-areas: "identity" "contacts" "nav"; gap: 36px; padding: 36px 0; }
  .footer-title { gap: 10px; font-size: 16px; }
  .footer-title > span:first-child { font-size: 12px; }
  .footer-description { max-width: 360px; margin-top: 20px; font-size: 16px; }
  .footer-motto { margin-top: 18px; font-size: 10px; letter-spacing: 0; }
  .footer-label { margin-bottom: 10px; }
  .footer-email { font-size: 30px; }
  .footer-author-links { max-width: 380px; margin-top: 20px; }
  .footer-navigation { column-gap: 20px; }
  .footer-navigation a { font-size: 16px; }
  .footer-legal { grid-template-columns: minmax(0, 1fr); gap: 22px; padding-top: 24px; }
  .footer-top { grid-column: auto; justify-self: start; }
}
@media (max-width: 650px) {
  .site-header { min-width: 0; gap: 8px; padding: 6px 10px; }
  .brand { flex: 1; gap: 6px; white-space: nowrap; }
  .brand-full, .account-full { display: none; }
  .brand-short { display: inline; overflow: hidden; font-size: 10px; letter-spacing: -.025em; text-overflow: ellipsis; }
  .brand .bracket { font-size: 14px; }
  .account-short { display: inline; font-size: 10px; }
  .header-account { gap: 5px; padding: 7px 9px; font-size: 10px; }
  .header-account .chevron { width: 13px; height: 13px; }
  .menu-control { width: 36px; height: 36px; }
}
@media (max-width: 350px) {
  .brand-short { font-size: 9px; }
  .header-account { padding: 7px; }
}

/* Author correction: terminal mark; reduced motion is handled by theme.css. */
.platform-mark { display:inline-block; font-family:var(--label-font); letter-spacing:-.06em; animation:platform-mark-blink 1.4s step-end infinite; }
@keyframes platform-mark-blink { 0%, 65%, 100% { opacity:1; } 66%, 99% { opacity:0; } }