/* Application shell: sidebar, top bar, main column, page headers, reading mode, session-expired overlay. */

.app { min-height: 100dvh; }
.shell { display: grid; grid-template-columns: var(--sidebar-w) minmax(0, 1fr); min-height: 100dvh; }
.shell__col { min-width: 0; display: flex; flex-direction: column; }
.shell__backdrop { display: none; }

/* ---------- sidebar (near-black in both themes, like the Portal) */
.sidebar {
  position: sticky; top: 0; height: 100dvh; display: flex; flex-direction: column; background: #090c13; color: #d7deea;
  border-right: 1px solid rgba(255, 255, 255, 0.07); z-index: 40; min-width: 0;
}
.sidebar__head { display: flex; align-items: center; gap: 0.5rem; padding: 0.9rem 0.9rem 0.7rem; }
.sidebar__close { display: none; color: #d7deea; }
.brand { display: flex; align-items: center; gap: 0.7rem; color: #fff; text-decoration: none; min-width: 0; flex: 1; }
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 2.15rem; height: 2.15rem; border-radius: 0.6rem; display: grid; place-items: center; flex: none;
  background: linear-gradient(135deg, #102a5b, #02a0fc); color: #fff; box-shadow: 0 2px 10px rgba(2, 160, 252, 0.35);
}
.brand__mark .icon { width: 1.15rem; height: 1.15rem; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand__text strong { font-size: 0.95rem; letter-spacing: -0.01em; }
.brand__text small { color: #8a96ad; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }
.nav { flex: 1; overflow-y: auto; padding: 0.4rem 0.6rem 1rem; display: flex; flex-direction: column; gap: 1.1rem; }
.nav__label { padding: 0 0.6rem 0.35rem; font-size: 0.68rem; letter-spacing: 0.09em; text-transform: uppercase; color: #6f7c93; font-weight: 700; }
.nav__link {
  position: relative; display: flex; align-items: center; gap: 0.7rem; padding: 0.52rem 0.65rem; border-radius: 0.5rem; color: #cdd5e3;
  font-size: 0.92rem; font-weight: 520; text-decoration: none; border: 0; background: none; width: 100%; text-align: left;
  transition: background var(--ease), color var(--ease);
}
.nav__link:hover { background: rgba(255, 255, 255, 0.06); color: #fff; text-decoration: none; }
.nav__link.is-active { background: rgba(2, 160, 252, 0.16); color: #fff; }
.nav__link.is-active::before { content: ""; position: absolute; left: -0.6rem; top: 0.45rem; bottom: 0.45rem; width: 3px; border-radius: 0 3px 3px 0; background: var(--primary); }
.nav__link .icon { color: #8a96ad; }
.nav__link.is-active .icon { color: var(--primary); }
.nav__text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav__count { margin-left: auto; }
.nav__link--small { font-size: 0.84rem; color: #a9b4c8; }
.sidebar__foot { padding: 0.6rem 0.6rem 0.8rem; border-top: 1px solid rgba(255, 255, 255, 0.07); display: flex; flex-direction: column; gap: 0.15rem; }
.headbadge {
  display: flex; align-items: center; gap: 0.45rem; padding: 0.4rem 0.6rem; margin-bottom: 0.4rem; border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.05); color: #a9b4c8; font-size: 0.75rem; min-width: 0;
}
.headbadge__sha { color: #5cc4ff; flex: none; }
.headbadge:empty { display: none; }

/* ---------- top bar */
.topbar {
  position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 0.5rem; height: var(--topbar-h); padding: 0 1.1rem;
  background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar__menu { display: none; }
.topbar__crumb { display: flex; align-items: center; gap: 0.4rem; font-size: 0.88rem; color: var(--muted); min-width: 0; white-space: nowrap; }
.topbar__root { font-weight: 600; }
.topbar__sep { width: 0.9em; height: 0.9em; }
.topbar__section { color: var(--text); font-weight: 650; overflow: hidden; text-overflow: ellipsis; }
.searchbox {
  display: inline-flex; align-items: center; gap: 0.55rem; height: 2.25rem; min-width: min(20rem, 34vw); padding: 0 0.7rem;
  border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface-2); color: var(--muted); text-align: left;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.searchbox:hover { border-color: var(--primary); }
.searchbox__text { flex: 1; font-size: 0.88rem; }
#search-icon { display: none; }
.userchip {
  display: inline-flex; align-items: center; gap: 0.55rem; height: 2.5rem; padding: 0 0.55rem 0 0.35rem; border: 1px solid transparent;
  border-radius: var(--radius); background: none; text-align: left; max-width: 17rem;
}
.userchip:hover { background: var(--surface-hover); }
.userchip__avatar {
  width: 1.85rem; height: 1.85rem; border-radius: 50%; display: grid; place-items: center; background: var(--navy); color: #fff;
  font-weight: 700; font-size: 0.85rem; flex: none; box-shadow: inset 0 0 0 2px var(--primary);
}
.userchip__text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.userchip__name { font-size: 0.86rem; font-weight: 620; }
.userchip__role { font-size: 0.74rem; color: var(--muted); }

/* ---------- main column */
.main { padding: 1.5rem 1.6rem 4rem; width: 100%; max-width: 92rem; margin: 0 auto; min-width: 0; outline: none; animation: kc-fade 140ms ease-out; }
.main--wide { max-width: none; }
.page-header { display: flex; align-items: flex-start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.page-header__text { flex: 1 1 18rem; min-width: 0; }
.page-header__actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }
.page-title { font-size: 1.6rem; letter-spacing: -0.02em; overflow-wrap: anywhere; }
.page-subtitle { color: var(--muted); margin-top: 0.3rem; max-width: 52rem; }
.crumbs { display: flex; align-items: center; gap: 0.35rem; flex-wrap: wrap; color: var(--muted); font-size: 0.82rem; margin-bottom: 0.45rem; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--text); }
.crumbs .icon { width: 0.85em; height: 0.85em; }
.section-title { display: flex; align-items: center; gap: 0.6rem; margin: 1.6rem 0 0.8rem; }
.section-title h2 { font-size: 1.05rem; }
.grid { display: grid; gap: 1rem; }
.grid--tiles { grid-template-columns: repeat(auto-fill, minmax(11.5rem, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 24rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 22rem); gap: 1.1rem; align-items: start; }

/* ---------- reading mode (hides the shell) */
.readingbar { display: none; position: fixed; right: 1rem; top: 0.8rem; z-index: 60; }
body.is-reading .sidebar, body.is-reading .topbar { display: none; }
body.is-reading .shell { grid-template-columns: minmax(0, 1fr); }
body.is-reading .readingbar { display: block; }
body.is-reading .main { max-width: 74rem; padding-top: 1rem; }

/* ---------- session expired */
.expired { position: fixed; inset: 0; z-index: 5000; background: var(--overlay); display: grid; place-items: center; padding: 1rem; backdrop-filter: blur(3px); }
.expired__card { background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-lg); padding: 2rem; max-width: 28rem; text-align: center; display: grid; gap: 0.9rem; justify-items: center; box-shadow: var(--shadow-lg); }
.expired__card .icon { color: var(--primary); }

/* ---------- responsive */
@media (max-width: 960px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; width: min(19rem, 86vw); transform: translateX(-102%); transition: transform 200ms cubic-bezier(0.2, 0, 0, 1);
    box-shadow: var(--shadow-lg); visibility: hidden; transition: transform 200ms cubic-bezier(0.2, 0, 0, 1), visibility 0s linear 200ms;
  }
  body.nav-open .sidebar { transform: none; visibility: visible; transition-delay: 0s; }
  .sidebar__close { display: inline-flex; }
  .shell__backdrop { position: fixed; inset: 0; background: var(--overlay); z-index: 35; display: none; }
  body.nav-open .shell__backdrop { display: block; }
  body.nav-open { overflow: hidden; }
  .topbar__menu { display: inline-flex; }
  .topbar { padding: 0 0.6rem; }
  .searchbox { display: none; }
  #search-icon { display: inline-flex; }
  .topbar__root, .topbar__sep { display: none; }
  .userchip__text { display: none; }
  .userchip { padding: 0 0.35rem; }
  .main { padding: 1rem 0.9rem 4rem; }
  .split { grid-template-columns: minmax(0, 1fr); }
  .page-title { font-size: 1.35rem; }
}
@media (max-width: 480px) {
  .searchbox__kbd { display: none; }
}
@media print {
  .sidebar, .topbar, .readingbar { display: none !important; }
  .shell { display: block; }
  .main { padding: 0; max-width: none; }
}