/* App shell: three-panel layout — clean white/black (matches marketing).
   Requires theme.css loaded before this file. */

:root {
  --shell-nav-width: 14rem;
  --shell-right-width: 16rem;
  --shell-status-height: 2.5rem;
}

body.app-shell {
  margin: 0;
  background: var(--x0-bg);
  color: var(--x0-ink);
  min-height: 100vh;
}

.app-shell-root {
  display: grid;
  grid-template-columns: var(--shell-nav-width) minmax(0, 1fr) var(--shell-right-width);
  grid-template-rows: auto minmax(0, 1fr) var(--shell-status-height);
  grid-template-areas:
    "top top top"
    "nav centre right"
    "status status status";
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
}

#panel-top {
  grid-area: top;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.65rem 1.1rem;
  background: var(--x0-bg);
  color: var(--x0-ink);
  border-bottom: 1px solid var(--x0-border);
}

#panel-top a {
  color: var(--x0-ink-soft);
  text-decoration: none;
}

#panel-top a:hover {
  color: var(--x0-ink);
  text-decoration: underline;
}

#panel-top .shell-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  color: var(--x0-ink);
  margin-right: 0.75rem;
  letter-spacing: -0.02em;
}

#panel-top .shell-brand img {
  width: 28px;
  height: 28px;
  display: block;
}

#panel-top .shell-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.95rem;
}

#panel-top .shell-breadcrumbs > span[aria-hidden] {
  color: var(--x0-muted);
}

#panel-top .shell-results {
  flex: 1 1 12rem;
  min-width: 0;
}

#panel-top .shell-results .messages {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

#panel-top .shell-results .messages li {
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--x0-ink);
  border: 1px solid var(--x0-border);
}

#panel-top .shell-results .messages .success { background: var(--x0-ok-bg); border-color: transparent; }
#panel-top .shell-results .messages .error { background: var(--x0-bad-bg); border-color: transparent; }
#panel-top .shell-results .messages .warning { background: var(--x0-warn-bg); border-color: transparent; }
#panel-top .shell-results .messages .info { background: var(--x0-bg-soft); }

#panel-nav {
  grid-area: nav;
  overflow: auto;
  background: var(--x0-bg);
  color: var(--x0-ink);
  padding: 0.75rem 0;
  border-right: 1px solid var(--x0-border);
}

#panel-nav a {
  color: var(--x0-ink-soft);
  text-decoration: none;
}

#panel-nav a:hover {
  color: var(--x0-ink);
  background: var(--x0-bg-soft);
}

#panel-nav .nav-section {
  margin: 0.85rem 0 0.35rem;
  padding: 0 0.95rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--x0-muted);
  font-weight: 700;
}

#panel-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#panel-nav li a,
#panel-nav li span.nav-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.95rem;
  font-size: 0.92rem;
}

#panel-nav li a .x0-picto {
  width: 1.15rem;
  height: 1.15rem;
  flex-shrink: 0;
  opacity: 0.9;
}

#panel-nav li a.active {
  background: var(--x0-bg-soft);
  color: var(--x0-ink);
  font-weight: 700;
  border-left: 3px solid var(--x0-accent);
  padding-left: calc(0.95rem - 3px);
}

#panel-nav .nav-account {
  padding: 0.55rem 0.95rem 0.85rem;
  border-bottom: 1px solid var(--x0-border);
  margin-bottom: 0.35rem;
}

#panel-nav .nav-account .account-name {
  color: var(--x0-ink);
  font-weight: 700;
  font-size: 0.95rem;
}

#panel-nav .nav-account .muted {
  color: var(--x0-muted) !important;
  font-size: 0.8rem;
}

#panel-centre {
  grid-area: centre;
  overflow: auto;
  padding: 1.15rem 1.4rem 1.75rem;
  background: var(--x0-bg-soft);
}

#panel-centre .card {
  background: var(--x0-surface);
  border: 1px solid var(--x0-border);
  border-radius: 6px;
  padding: 1.25rem 1.35rem;
  margin: 0 0 1rem;
  box-shadow: none;
}

#panel-centre .card:target {
  outline: 2px solid var(--x0-accent);
  outline-offset: 2px;
}

#panel-centre .card h1 {
  font-size: 1.55rem;
  letter-spacing: -0.02em;
  font-weight: 750;
}

#panel-centre .card h2 {
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

#panel-centre .email-tabs {
  display: flex;
  gap: 0.35rem;
  margin: 0 0 1rem;
  padding: 0;
}
#panel-centre .email-tabs a {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border-radius: 4px;
  text-decoration: none;
  color: var(--x0-ink-soft);
  background: var(--x0-bg);
  border: 1px solid var(--x0-border);
  font-weight: 600;
  font-size: 0.9rem;
}
#panel-centre .email-tabs a.active {
  background: var(--x0-ink);
  color: var(--x0-bg);
  border-color: var(--x0-ink);
}

#panel-right {
  grid-area: right;
  overflow: auto;
  padding: 1rem 0.9rem;
  background: var(--x0-bg);
  border-left: 1px solid var(--x0-border);
}

#panel-right:not(:has(*)) {
  display: none;
}

.app-shell-root:has(#panel-right:not(:has(*))) {
  grid-template-columns: var(--shell-nav-width) minmax(0, 1fr);
  grid-template-areas:
    "top top"
    "nav centre"
    "status status";
}

#panel-right .card {
  background: var(--x0-surface);
  border: 1px solid var(--x0-border);
  border-radius: 6px;
  padding: 1rem;
  margin: 0 0 0.75rem;
}

#panel-right h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#panel-status {
  grid-area: status;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 0 1rem;
  background: var(--x0-bg);
  color: var(--x0-ink-soft);
  font-size: 0.85rem;
  border-top: 1px solid var(--x0-border);
}

.status-light {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.status-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--x0-off);
  flex-shrink: 0;
}

.status-light.ok .status-dot { background: #2f9e4a; }
.status-light.warn .status-dot { background: var(--x0-accent); }
.status-light.bad .status-dot { background: #e85d5d; }
.status-light.off .status-dot { background: var(--x0-off); }

.status-meta {
  margin-left: auto;
  color: var(--x0-muted);
  font-size: 0.8rem;
}

/* Concertina nav */
.shell-concertina .nav-fold {
  border-bottom: 1px solid var(--x0-border);
}
.shell-concertina .nav-fold-summary {
  cursor: pointer;
  list-style: none;
  padding: 0.55rem 0.95rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 750;
  color: var(--x0-muted);
  user-select: none;
}
.shell-concertina .nav-fold-summary::-webkit-details-marker { display: none; }
.shell-concertina .nav-fold-summary::after {
  content: "▸";
  float: right;
  color: var(--x0-accent);
  font-size: 0.75rem;
}
.shell-concertina .nav-fold[open] > .nav-fold-summary::after {
  content: "▾";
}
.shell-concertina .nav-fold-list {
  list-style: none;
  margin: 0 0 0.35rem;
  padding: 0;
}
.nav-density-toggle {
  display: inline-flex;
  gap: 0.25rem;
  margin-top: 0.45rem;
}
.nav-density {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--x0-border);
  border-radius: 3px;
  color: var(--x0-muted) !important;
  text-decoration: none !important;
}
.nav-density.active {
  background: var(--x0-ink);
  color: var(--x0-bg) !important;
  border-color: var(--x0-ink);
}

/* Our notes (post-it) */
.our-notes {
  background: #fffbeb;
  border: 1px solid #f0e0a8;
  border-radius: 4px;
  padding: 0.85rem 0.9rem;
  box-shadow: 1px 2px 0 rgba(0, 0, 0, 0.04);
}
html[data-theme="dark"] .our-notes {
  background: #2a2410;
  border-color: #5c4d1a;
}
.our-notes-title {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 750;
}
.our-notes-hint {
  margin: 0 0 0.55rem;
  font-size: 0.8rem;
}
.our-notes-form textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid #e8d78a;
  border-radius: 3px;
  background: #fffdf5;
  color: var(--x0-ink);
  font: inherit;
  font-size: 0.88rem;
  padding: 0.5rem;
  resize: vertical;
  min-height: 8rem;
}
.our-notes-form .row-actions {
  margin: 0.45rem 0 0;
  margin-left: 0;
}
.our-notes-meta {
  margin: 0.45rem 0 0;
  font-size: 0.75rem;
}

/* Dense dashboard */
.dash-dense .card {
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.65rem;
}
.dash-dense .card h1 { font-size: 1.2rem; }
.dash-dense .card h2 { font-size: 1rem; margin: 0 0 0.35rem; }
.dash-dense p { margin: 0.35rem 0; }
.dash-dense .card-title-with-ico { margin-bottom: 0.35rem; }
.dash-panel-title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.dash-panel-title h1 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.x0-picto {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  vertical-align: middle;
  object-fit: contain;
}
.x0-picto-lg { width: 2rem; height: 2rem; }
.x0-picto-xl { width: 2.75rem; height: 2.75rem; }

body.app-shell.ops-layout .app-shell-root {
  /* keep ops class for any leftover selectors */
}

@media (max-width: 900px) {
  .app-shell-root {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto minmax(0, 1fr) auto;
    grid-template-areas:
      "top"
      "nav"
      "centre"
      "status";
    height: auto;
    max-height: none;
    min-height: 100vh;
    overflow: visible;
  }
  #panel-nav {
    border-right: 0;
    border-bottom: 1px solid var(--x0-border);
    max-height: 12rem;
  }
  #panel-right {
    display: none;
  }
}