/* leftnav.css — Single source of truth for the V4 leftnav.
   Every page (editing-mode-new, view-mode-new, graphs-hub) now uses the
   same shell convention: a top-level `.app` element that gets
   `leftnav-expanded` when the rail is wide. This file is loaded LAST on
   every page so it owns the leftnav styling. */

/* ── Container ────────────────────────────────────────────────── */
/* Drawer-style open/close: width and grid track animate together so the
   leftnav slides horizontally. Labels fade in slightly after the slide
   starts and fade out at the start of the collapse — see .nav-label /
   .lns-label / .lp-title / .lc-meta / .la-label rules below. */
.leftnav {
  padding: 8px 6px;
  transition: width 180ms ease;
}
/* graphs-hub uses a grid track for the leftnav width instead of an
   explicit `.leftnav { width }`. Animate the grid track so the drawer
   slide happens there too. */
.layout { transition: grid-template-columns 180ms ease; }

/* ── Brand row (logo + collapse toggle) ───────────────────────── */
.leftnav-brand-row {
  display: flex; flex-direction: column; align-items: center; gap: 0;
}
.app.leftnav-expanded .leftnav-brand-row {
  flex-direction: row; align-items: center; justify-content: space-between;
  gap: 0; padding: 2px 4px 2px 8px;
}
.leftnav-brand-row .brand--leftnav { margin-bottom: 0; }

/* ── Nav toggle (chevron) ─────────────────────────────────────── */
.leftnav .nav-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0;
  border-radius: 6px; background: transparent; border: none;
  cursor: pointer; color: var(--text-muted);
  flex-shrink: 0;
}
.app.leftnav-expanded .leftnav .nav-toggle {
  width: auto; height: auto; padding: 0;
}
.leftnav .nav-toggle:hover { background: var(--surface-hover, var(--bg)); color: var(--text-primary); }
.leftnav .nav-toggle svg { width: 16px; height: 16px; flex-shrink: 0; }
.leftnav .nav-toggle .nav-toggle-close { display: none; }
.app.leftnav-expanded .leftnav .nav-toggle .nav-toggle-open { display: none; }
.app.leftnav-expanded .leftnav .nav-toggle .nav-toggle-close { display: block; }

/* ── Search box (expanded only) ───────────────────────────────── */
.leftnav-search {
  display: flex; align-items: center; gap: 8px;
  margin: 6px 8px 8px;
  padding: 7px 10px;
  background: var(--bg);
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--text-secondary);
  font: inherit; font-size: 13px;
  cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.leftnav-search:hover { border-color: var(--border); color: var(--text-primary); }
.leftnav-search svg { width: 14px; height: 14px; flex-shrink: 0; }
.leftnav-search .lns-label { flex: 1; text-align: left; white-space: nowrap; }
.leftnav-search { white-space: nowrap; overflow: hidden; }
.leftnav-search .lns-kbd {
  font-size: 11px; color: var(--text-muted);
  background: var(--surface, #fff);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}
/* Collapsed: hide the search entirely. The expand-toggle takes the
   search slot (see brand-row rules below). */
.app:not(.leftnav-expanded) .leftnav-search { display: none; }

/* Collapsed brand row: logo on top, expand-toggle stacked below in the
   same vertical slot the expanded search box would occupy. All centered
   so toggling reads as a pure horizontal slide. */
.app:not(.leftnav-expanded) .leftnav-brand-row {
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0;
}
.app:not(.leftnav-expanded) #navToggleBtn {
  display: flex;
  width: 36px; height: 36px;
  margin: 0 auto;
  padding: 0;
  align-items: center; justify-content: center;
}
.app:not(.leftnav-expanded) #navToggleBtn svg { width: 16px; height: 16px; }

/* ── Generic nav-item (Home / Community / Settings / + New project) ── */
.leftnav .nav-item {
  display: flex; align-items: center; gap: 10px;
  height: 34px; padding: 0 8px;
  margin: 1px 8px;
  border-radius: 7px;
  background: transparent; border: none;
  color: var(--text-muted);
  font: inherit; font-size: 13px; font-weight: 500;
  cursor: pointer;
  text-align: left;
  text-decoration: none;
  transition: background .12s, color .12s;
}
.leftnav .nav-item:hover { background: var(--surface-hover, var(--bg)); color: var(--primary); }
.leftnav .nav-item.active {
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  font-weight: 600;
}
.leftnav .nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
/* Lock labels to one line so they don't wrap during the width animation. */
.leftnav .nav-item { white-space: nowrap; overflow: hidden; }
.leftnav .nav-item .nav-label { white-space: nowrap; }
.brand-wordmark { white-space: nowrap; }
.app:not(.leftnav-expanded) .leftnav .nav-item {
  width: 36px; height: 36px;
  padding: 0;
  margin: 2px auto;
  align-self: center;
  justify-content: center;
}
.app:not(.leftnav-expanded) .leftnav .nav-item .nav-label { display: none; }

/* ── Collapsable sections (Projects) ──────────────────────────── */
.leftnav-collapsable { margin: 0; }
.leftnav-collapsable .lp-header {
  display: flex; align-items: center; gap: 10px;
  margin: 1px 8px;
  width: calc(100% - 16px);
  box-sizing: border-box;
  height: 34px; padding: 0 8px;
  background: transparent; border: none;
  border-radius: 7px;
  color: var(--text-muted);
  font: inherit; font-size: 13px; font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background .12s, color .12s;
}
.leftnav-collapsable .lp-header:hover { background: var(--surface-hover, var(--bg)); color: var(--primary); }
.leftnav-collapsable .lp-folder { width: 18px; height: 18px; flex-shrink: 0; }
.leftnav-collapsable .lp-title { flex: 1; white-space: nowrap; }
.leftnav-collapsable .lp-header { white-space: nowrap; overflow: hidden; }
.leftnav-collapsable .lp-chev {
  width: 14px; height: 14px; flex-shrink: 0;
  transition: transform .15s ease;
}
.leftnav-collapsable[data-expanded="false"] .lp-chev { transform: rotate(-90deg); }

/* Tree (children) — caps at 6.5 rows; the 7th appears half-faded so
   users discover that the list scrolls. */
.leftnav-collapsable .lp-tree {
  position: relative;
  margin: 2px 8px 4px 21px;
  padding: 0 0 0 14px;
  display: flex; flex-direction: column;
  overflow-x: hidden;
  overflow-y: auto;
  max-height: 205px;
  scrollbar-width: thin;
}
.leftnav-collapsable .lp-tree.is-scrollable {
  -webkit-mask-image: linear-gradient(to bottom, black calc(100% - 16px), transparent 100%);
  mask-image: linear-gradient(to bottom, black calc(100% - 16px), transparent 100%);
}
.leftnav-collapsable[data-expanded="false"] .lp-tree { display: none; }

.leftnav-collapsable .lp-node {
  position: relative;
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px;
  margin: 1px 0;
  border-radius: 6px;
  color: var(--text-secondary);
  font: inherit; font-size: 13px;
  text-decoration: none;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  line-height: 1.2;
  transition: background .12s, color .12s;
  min-width: 0;
}
.leftnav-collapsable .lp-node-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }

.leftnav-collapsable .lp-tree::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 1px;
  background: var(--border);
  pointer-events: none;
}
.leftnav-collapsable .lp-node::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 0;
  width: 12px;
  height: 50%;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-bottom-left-radius: 8px;
  pointer-events: none;
}

.leftnav-collapsable .lp-node:hover { background: var(--surface-hover, var(--bg)); color: var(--text-primary); }
.leftnav-collapsable .lp-node.active {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
  font-weight: 600;
}
.leftnav-collapsable .lp-node.active:hover { background: color-mix(in srgb, var(--primary) 16%, transparent); }

/* Collapsed: header becomes a 36×36 icon-button (folder only). Tree
   hidden, title and chevron hidden. Clicking expands the leftnav
   (wired in leftnav.js). */
.app:not(.leftnav-expanded) .leftnav-collapsable .lp-tree { display: none; }
.app:not(.leftnav-expanded) .leftnav-collapsable .lp-header {
  width: 36px; height: 36px;
  padding: 0;
  margin: 2px auto;
  justify-content: center;
}
.app:not(.leftnav-expanded) .leftnav-collapsable .lp-header .lp-title,
.app:not(.leftnav-expanded) .leftnav-collapsable .lp-header .lp-chev { display: none; }
/* + New project hidden in collapsed mode — the folder icon above is
   the entry point. */
.app:not(.leftnav-expanded) #lpAddProject { display: none; }

/* ── Horizontal divider ───────────────────────────────────────── */
.leftnav .leftnav-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 8px 16px;
  height: 0;
}
.app:not(.leftnav-expanded) .leftnav .leftnav-divider { margin: 8px 8px; }

/* ── Credits chip (footer area) ───────────────────────────────── */
.leftnav-credits {
  margin: auto 6px 6px 6px;
  display: flex; align-items: center; gap: 8px;
  padding: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font: inherit; font-size: 11.5px;
  cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.leftnav-credits:hover { border-color: var(--primary); color: var(--primary); }
.leftnav-credits .lc-ico {
  flex-shrink: 0;
  width: 22px; height: 22px;
  display: grid; place-items: center;
  border-radius: 5px;
  background: color-mix(in srgb, var(--primary) 14%, transparent);
  color: var(--primary);
}
.leftnav-credits .lc-ico svg { width: 13px; height: 13px; }
.leftnav-credits .lc-meta {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column; gap: 2px;
  text-align: left;
}
.leftnav-credits .lc-label {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); font-weight: 600;
}
.leftnav-credits .lc-value {
  font-size: 12px; font-weight: 600; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.leftnav-credits .lc-bar {
  display: block; width: 100%; height: 3px;
  background: var(--border); border-radius: 2px; margin-top: 2px;
  overflow: hidden;
}
.leftnav-credits .lc-bar-fill {
  display: block; height: 100%; background: var(--primary);
  transition: width .25s ease;
}
/* Hide the credits chip entirely in collapsed mode — the cloud icon
   was the only thing showing and it didn't add enough on its own to
   earn its slot. Auth CTA stays so users can still log in. */
.app:not(.leftnav-expanded) .leftnav-credits { display: none; }

/* ── Auth CTA (footer area) ───────────────────────────────────── */
.leftnav-auth {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin: 4px 8px 8px;
  padding: 9px 10px;
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 8px;
  color: #fff;
  font: inherit; font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: background .12s, border-color .12s, opacity .12s;
}
.leftnav-auth:hover { background: var(--primary-hover, var(--primary)); border-color: var(--primary-hover, var(--primary)); opacity: 0.95; }
.leftnav-auth .la-icon { width: 16px; height: 16px; flex-shrink: 0; }
/* Lock the label to one line — during the leftnav width animation the
   button passes through narrow intermediate widths and the text would
   otherwise wrap, then snap back, in rapid flashes. */
.leftnav-auth .la-label { text-align: left; white-space: nowrap; }
.leftnav-auth { white-space: nowrap; overflow: hidden; }
.app:not(.leftnav-expanded) .leftnav-auth .la-label { display: none; }
.app:not(.leftnav-expanded) .leftnav-auth {
  justify-content: center;
  padding: 8px;
  margin: 4px auto 8px;
  width: 36px; height: 36px;
}

/* ── Brand wordmark visibility ────────────────────────────────── */
.app:not(.leftnav-expanded) .brand-wordmark { display: none; }

/* ── Top section is a flex column so footer items push to the bottom ── */
.leftnav .leftnav-top {
  display: flex; flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
}