/* DCS Dashboard Shell v1 — Layout + Components
 * Azure-light theme. Header + Sidebar + Footer.
 * Host page mounts content into <main id="dcs-main">.
 */

/* === ROOT LAYOUT === */
#dcs-shell {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-rows: var(--dcs-header-h) 1fr var(--dcs-footer-h);
  grid-template-columns: var(--dcs-sidebar-w) 1fr;
  grid-template-areas:
    "header header"
    "sidebar main"
    "footer footer";
  background: var(--dcs-bg-2);
  color: var(--dcs-ink);
  z-index: var(--dcs-z-base);
}

#dcs-shell[data-sidebar="collapsed"] {
  grid-template-columns: var(--dcs-sidebar-w-collapsed) 1fr;
}

@media (max-width: 900px) {
  #dcs-shell {
    grid-template-columns: 0 1fr;
  }
  #dcs-shell .dcs-sidebar {
    transform: translateX(-100%);
    width: var(--dcs-sidebar-w);
    transition: transform .22s ease;
    z-index: var(--dcs-z-overlay);
  }
  #dcs-shell[data-sidebar="open"] .dcs-sidebar {
    transform: translateX(0);
    box-shadow: var(--dcs-shadow-lg);
  }
}

/* === HEADER === */
.dcs-header {
  grid-area: header;
  display: flex;
  align-items: center;
  gap: var(--dcs-s3);
  padding: 0 var(--dcs-s5);
  background: var(--dcs-bg);
  border-bottom: 1px solid var(--dcs-line);
  z-index: var(--dcs-z-header);
}

.dcs-header__menu-btn {
  width: 36px; height: 36px;
  border-radius: var(--dcs-r-sm);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--dcs-ink-2);
}
.dcs-header__menu-btn:hover { background: var(--dcs-bg-2); }

.dcs-header__brand {
  display: flex; align-items: center; gap: var(--dcs-s2);
  font-weight: 600; font-size: 15px;
  color: var(--dcs-ink);
  margin-right: var(--dcs-s4);
}
.dcs-header__brand-mark {
  width: 24px; height: 24px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--dcs-blue), #5b8def);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 12px;
}
.dcs-header__product {
  color: var(--dcs-muted);
  font-weight: 500;
  padding-left: var(--dcs-s2);
  border-left: 1px solid var(--dcs-line);
  margin-left: var(--dcs-s2);
}

.dcs-header__search {
  flex: 1;
  max-width: 520px;
  position: relative;
}
.dcs-header__search input {
  width: 100%;
  height: 34px;
  border: 1px solid var(--dcs-line);
  border-radius: var(--dcs-r-sm);
  padding: 0 var(--dcs-s3) 0 var(--dcs-s8);
  background: var(--dcs-bg-2);
  color: var(--dcs-ink);
  outline: none;
  transition: border-color .15s, background .15s;
}
.dcs-header__search input:focus {
  border-color: var(--dcs-blue);
  background: var(--dcs-bg);
}
.dcs-header__search-icon {
  position: absolute;
  left: var(--dcs-s3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--dcs-muted);
  pointer-events: none;
}

.dcs-header__actions {
  display: flex; align-items: center; gap: var(--dcs-s2);
  margin-left: auto;
}
.dcs-header__icon-btn {
  width: 36px; height: 36px;
  border-radius: var(--dcs-r-sm);
  color: var(--dcs-ink-2);
  display: inline-flex; align-items: center; justify-content: center;
  position: relative;
}
.dcs-header__icon-btn:hover { background: var(--dcs-bg-2); }
.dcs-header__badge {
  position: absolute;
  top: 6px; right: 6px;
  min-width: 8px; height: 8px;
  background: var(--dcs-red);
  border-radius: 50%;
  border: 2px solid var(--dcs-bg);
}

.dcs-header__user {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--dcs-blue-tint);
  color: var(--dcs-blue);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 13px;
  cursor: pointer;
}

/* === SIDEBAR === */
.dcs-sidebar {
  grid-area: sidebar;
  background: var(--dcs-bg);
  border-right: 1px solid var(--dcs-line);
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--dcs-s4) 0;
  display: flex; flex-direction: column;
}

.dcs-sidebar__group { margin-bottom: var(--dcs-s5); }
.dcs-sidebar__group-title {
  padding: 0 var(--dcs-s5);
  margin-bottom: var(--dcs-s2);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--dcs-muted);
}

.dcs-sidebar__link {
  display: flex; align-items: center; gap: var(--dcs-s3);
  padding: 8px var(--dcs-s5);
  color: var(--dcs-ink-2);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: background .12s, color .12s;
  cursor: pointer;
}
.dcs-sidebar__link:hover {
  background: var(--dcs-bg-2);
  text-decoration: none;
}
.dcs-sidebar__link.is-active {
  background: var(--dcs-blue-tint);
  color: var(--dcs-blue);
  border-left-color: var(--dcs-blue);
  font-weight: 600;
}
.dcs-sidebar__link-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
}
.dcs-sidebar__link-label { flex: 1; }
.dcs-sidebar__link-badge {
  font-size: 11px;
  background: var(--dcs-line);
  color: var(--dcs-ink-3);
  padding: 2px 6px;
  border-radius: 10px;
}

#dcs-shell[data-sidebar="collapsed"] .dcs-sidebar__group-title,
#dcs-shell[data-sidebar="collapsed"] .dcs-sidebar__link-label,
#dcs-shell[data-sidebar="collapsed"] .dcs-sidebar__link-badge {
  display: none;
}
#dcs-shell[data-sidebar="collapsed"] .dcs-sidebar__link {
  justify-content: center;
  padding: 8px 0;
}

/* === MAIN === */
.dcs-main {
  grid-area: main;
  overflow-y: auto;
  padding: var(--dcs-s6);
  background: var(--dcs-bg-2);
}

/* === FOOTER === */
.dcs-footer {
  grid-area: footer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--dcs-s5);
  background: var(--dcs-bg);
  border-top: 1px solid var(--dcs-line);
  color: var(--dcs-muted);
  font-size: 12px;
}
.dcs-footer__links { display: flex; gap: var(--dcs-s4); }
.dcs-footer__links a { color: var(--dcs-muted); }
.dcs-footer__links a:hover { color: var(--dcs-ink-2); }

.dcs-footer__status {
  display: flex; align-items: center; gap: 6px;
}
.dcs-footer__status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--dcs-green);
}

/* === BACKDROP (mobile sidebar) === */
.dcs-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.35);
  z-index: calc(var(--dcs-z-overlay) - 1);
  opacity: 0; pointer-events: none;
  transition: opacity .18s;
}
#dcs-shell[data-sidebar="open"] .dcs-backdrop {
  opacity: 1; pointer-events: auto;
}

/* === UTILITY: shared card style === */
.dcs-card {
  background: var(--dcs-bg);
  border: 1px solid var(--dcs-line);
  border-radius: var(--dcs-r);
  box-shadow: var(--dcs-shadow-sm);
}