/* Shared left sidebar — included on pages that don't have their own
   purpose-built nav (currently customers.html). Mirrors the sidebar in
   index.html so navigation feels consistent across the app.

   Pages using this stylesheet should:
     1. Wrap their main layout in <div class="app-shell">
     2. Let sidebar.js inject the <nav class="sidebar"> as the first child
     3. Put their main content in a sibling element (e.g. <main class="app-main">) */

:root {
  --bp-sidebar-w:           228px;
  --bp-sidebar-w-collapsed: 60px;
  --bp-nav-bg:      #0f2040;
  --bp-nav-text:    rgba(255,255,255,.72);
  --bp-nav-hover:   rgba(255,255,255,.07);
  --bp-nav-active:  #1e3a62;
}
body.dark {
  --bp-nav-bg:     #081525;
  --bp-nav-active: #1a3560;
}

.app-shell { display: flex; height: 100vh; overflow: hidden; }
.app-main  { flex: 1; min-width: 0; display: flex; flex-direction: column; overflow: auto; }

.sidebar {
  width: var(--bp-sidebar-w); flex-shrink: 0;
  background: var(--bp-nav-bg); display: flex; flex-direction: column;
  height: 100vh; overflow-y: auto; overflow-x: hidden;
  position: relative; z-index: 20;
  transition: width .22s cubic-bezier(.4,0,.2,1);
}
.sidebar.collapsed { width: var(--bp-sidebar-w-collapsed); }

.sidebar-logo {
  display: flex; align-items: center; justify-content: center;
  padding: 16px 14px; border-bottom: 1px solid rgba(255,255,255,.08);
  flex-shrink: 0; overflow: hidden;
}
.sidebar-logo-img {
  height: 36px; width: auto; max-width: 160px;
  object-fit: contain; object-position: left center;
  transition: opacity .18s, max-width .22s cubic-bezier(.4,0,.2,1);
}
.sidebar.collapsed .sidebar-logo-img { max-width: 0; opacity: 0; }

/* Collapse toggle — sits in the sidebar footer, styled like a nav row */
.sidebar-collapse-btn {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 14px; margin: 1px 0; border-radius: 8px;
  background: none; border: 0; width: 100%;
  color: var(--bp-nav-text); cursor: pointer;
  font: 500 13px/1 inherit; font-family: inherit; text-align: left;
  transition: background .13s, color .13s;
}
.sidebar-collapse-btn:hover { background: var(--bp-nav-hover); color: #fff; }
.sidebar-collapse-btn svg {
  width: 16px; height: 16px; flex-shrink: 0; opacity: .8;
  transition: transform .22s;
}
.sidebar.collapsed .sidebar-collapse-btn svg { transform: rotate(180deg); }
.sidebar-collapse-label { transition: opacity .18s; }
.sidebar.collapsed .sidebar-collapse-label { opacity: 0; width: 0; overflow: hidden; }

.sidebar-nav { flex: 1; padding: 10px 0; }

.nav-section-label {
  font-size: 9.5px; font-weight: 700; letter-spacing: .1em;
  color: rgba(255,255,255,.28); padding: 12px 18px 4px;
  text-transform: uppercase; white-space: nowrap; overflow: hidden;
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; user-select: none; padding-right: 16px;
  transition: color .15s;
}
.nav-section-label:hover { color: rgba(255,255,255,.55); }
.nav-chevron {
  width: 12px; height: 12px; flex-shrink: 0;
  transition: transform .22s cubic-bezier(.4,0,.2,1), opacity .18s;
  opacity: .4;
}
.nav-section-label:hover .nav-chevron { opacity: .8; }
.nav-group.collapsed .nav-chevron { transform: rotate(-90deg); }
.nav-group-items {
  overflow: hidden;
  max-height: 500px;
  transition: max-height .28s cubic-bezier(.4,0,.2,1), opacity .22s;
  opacity: 1;
}
.nav-group.collapsed .nav-group-items { max-height: 0; opacity: 0; }

.nav-item {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 14px; margin: 1px 8px; border-radius: 8px;
  color: var(--bp-nav-text); cursor: pointer; text-decoration: none;
  transition: background .13s, color .13s; white-space: nowrap;
  font-size: 13px; font-weight: 500;
}
.nav-item:hover  { background: var(--bp-nav-hover); color: #fff; }
.nav-item.active { background: var(--bp-nav-active); color: #fff; }
.nav-item svg    { width: 16px; height: 16px; flex-shrink: 0; opacity: .8; }
.nav-item.active svg { opacity: 1; }
.nav-item-label  { transition: opacity .18s; }

/* Collapsed state — hide labels and section headers, leave just icons */
.sidebar.collapsed .nav-item-label,
.sidebar.collapsed .theme-toggle-label { opacity: 0; width: 0; overflow: hidden; }
.sidebar.collapsed .nav-section-label { opacity: 0; pointer-events: none; height: 0; padding: 0; }
.sidebar.collapsed .nav-chevron { display: none; }

.sidebar-footer {
  padding: 12px 10px; border-top: 1px solid rgba(255,255,255,.08);
}

.theme-toggle {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 14px; margin: 1px 0; border-radius: 8px;
  background: none; border: 0; width: 100%;
  color: var(--bp-nav-text); cursor: pointer; font-size: 13px; font-weight: 500;
  font-family: inherit; text-align: left;
  transition: background .13s, color .13s;
}
.theme-toggle:hover { background: var(--bp-nav-hover); color: #fff; }
.theme-toggle svg { width: 16px; height: 16px; flex-shrink: 0; opacity: .8; }