/* =========================================================
   Neurofenix Hub, shared sidebar stylesheet
   Used by healthcare-hub.html and healthcare-group.html.
   Single source of truth for sidebar tokens and rules,
   so both pages cannot drift.

   This file expects the host page to provide these base
   tokens in its :root (colors, radius, fonts):
     --hub-navy-deep, --hub-white, --hub-teal-50,
     --hub-teal-500, --hub-teal-700
   ========================================================= */

:root {
  /* ─── Sidebar nav tokens, the ONE place to edit ─── */
  --nav-font-family: 'DM Sans', sans-serif;
  --nav-item-font-size: 13px;
  --nav-item-font-weight: 500;
  --nav-item-font-weight-active: 600;
  --nav-item-line-height: 1.2;
  --nav-item-letter-spacing: -0.005em;
  --nav-item-padding: 10px 12px;
  --nav-item-radius: 10px;
  --nav-item-gap: 12px;
  --nav-icon-size: 18px;

  --nav-item-color: rgba(255,255,255,0.72);
  --nav-item-color-hover: #FFFFFF;
  --nav-item-color-active: var(--hub-navy-deep);
  --nav-item-bg: transparent;
  --nav-item-bg-hover: rgba(255,255,255,0.05);
  --nav-item-bg-active: var(--hub-white);

  --nav-badge-font-size: 10px;
  --nav-badge-font-weight: 700;
  --nav-badge-letter-spacing: 0.02em;
  --nav-badge-padding: 2px 8px;
  --nav-badge-radius: 999px;
  --nav-badge-bg: rgba(255,255,255,0.08);
  --nav-badge-color: rgba(255,255,255,0.7);
  --nav-badge-bg-active: var(--hub-teal-50);
  --nav-badge-color-active: var(--hub-teal-700);

  --nav-section-font-size: 10px;
  --nav-section-font-weight: 700;
  --nav-section-letter-spacing: 0.14em;
  --nav-section-color: rgba(255,255,255,0.4);
  --nav-section-padding: 10px 12px 4px;

  /* Brand + side card tokens (kept here for the same reason) */
  --nav-sidebar-width: 248px;
  --nav-sidebar-padding: 22px 18px 18px;
  --nav-sidebar-gap: 14px;
  --nav-sidebar-bg: var(--hub-navy-deep);
  --nav-sidebar-text: rgba(255,255,255,0.85);

  --nav-brand-gap: 10px;
  --nav-brand-mark-size: 32px;
  --nav-brand-name-size: 15px;
  --nav-brand-sub-size: 10px;

  --nav-side-card-radius: 12px;
  --nav-side-card-padding: 14px;
  --nav-side-card-bg: rgba(255,255,255,0.04);
  --nav-side-card-border: rgba(255,255,255,0.08);
  --nav-side-card-text: rgba(255,255,255,0.7);
  --nav-side-card-meta: rgba(255,255,255,0.6);
}

/* ─── Sidebar shell ─── */
.hub-sidebar {
  width: var(--nav-sidebar-width);
  flex-shrink: 0;
  background: var(--nav-sidebar-bg);
  color: var(--nav-sidebar-text);
  display: flex;
  flex-direction: column;
  padding: var(--nav-sidebar-padding);
  gap: var(--nav-sidebar-gap);
}

/* ─── Brand block ─── */
.hub-brand {
  display: flex;
  align-items: center;
  gap: var(--nav-brand-gap);
  padding: 4px 6px;
}
.hub-brand-mark {
  width: var(--nav-brand-mark-size);
  height: var(--nav-brand-mark-size);
  border-radius: 8px;
  background: linear-gradient(135deg, var(--hub-teal-500) 0%, #9FE7EC 100%);
  display: grid;
  place-items: center;
  color: var(--hub-navy-deep);
  font-family: var(--nav-font-family);
  font-weight: 800;
  font-size: 17px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.35);
  letter-spacing: -0.02em;
}
.hub-brand-text { line-height: 1.15; }
.hub-brand-name {
  font-family: var(--nav-font-family);
  font-size: var(--nav-brand-name-size);
  font-weight: 700;
  color: var(--hub-white);
  letter-spacing: -0.01em;
}
.hub-brand-sub {
  font-family: var(--nav-font-family);
  font-size: var(--nav-brand-sub-size);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-top: 2px;
  font-weight: 600;
}

/* ─── Back link (used on group page) ─── */
.hub-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-family: var(--nav-font-family);
  font-size: 12px;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  transition: color 0.15s, background 0.15s;
  border-radius: 8px;
  text-decoration: none;
}
.hub-back-link:hover {
  color: var(--hub-white);
  background: rgba(255,255,255,0.05);
}
.hub-back-link svg { width: 14px; height: 14px; }

/* ─── Nav list ─── */
.hub-nav { display: flex; flex-direction: column; gap: 2px; }

.hub-nav-section {
  font-family: var(--nav-font-family);
  font-size: var(--nav-section-font-size);
  font-weight: var(--nav-section-font-weight);
  letter-spacing: var(--nav-section-letter-spacing);
  color: var(--nav-section-color);
  padding: var(--nav-section-padding);
  text-transform: uppercase;
}

/* Applies to both <a> and <button>.
   Defensive resets below kill any UA difference. */
.hub-nav-item {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  margin: 0;
  text-decoration: none;
  font-style: normal;
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
  font-optical-sizing: auto;
  /* Layout */
  display: flex;
  align-items: center;
  gap: var(--nav-item-gap);
  width: 100%;
  padding: var(--nav-item-padding);
  border-radius: var(--nav-item-radius);
  text-align: left;
  cursor: pointer;
  /* Typography, fully tokenised */
  font-family: var(--nav-font-family);
  font-size: var(--nav-item-font-size);
  font-weight: var(--nav-item-font-weight);
  line-height: var(--nav-item-line-height);
  letter-spacing: var(--nav-item-letter-spacing);
  /* Color */
  background: var(--nav-item-bg);
  color: var(--nav-item-color);
  transition: background 0.12s, color 0.12s;
}
.hub-nav-item:hover {
  background: var(--nav-item-bg-hover);
  color: var(--nav-item-color-hover);
}
.hub-nav-item.is-active {
  background: var(--nav-item-bg-active);
  color: var(--nav-item-color-active);
  font-weight: var(--nav-item-font-weight-active);
}
.hub-nav-item > svg {
  width: var(--nav-icon-size);
  height: var(--nav-icon-size);
  flex: none;
}

/* Badge: tabular numerals so 20 and 4 have identical digit widths
   across default and active states. */
.hub-nav-badge {
  margin-left: auto;
  font-family: var(--nav-font-family);
  font-size: var(--nav-badge-font-size);
  font-weight: var(--nav-badge-font-weight);
  letter-spacing: var(--nav-badge-letter-spacing);
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
  padding: var(--nav-badge-padding);
  border-radius: var(--nav-badge-radius);
  background: var(--nav-badge-bg);
  color: var(--nav-badge-color);
  line-height: 1.2;
}
.hub-nav-item.is-active .hub-nav-badge {
  background: var(--nav-badge-bg-active);
  color: var(--nav-badge-color-active);
}
.hub-nav-badge.plus {
  /* Gradient variant, not tokenised on purpose */
  background: linear-gradient(135deg, var(--hub-teal-500) 0%, #9FE7EC 100%);
  color: var(--hub-navy-deep);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ─── Partner side card ─── */
.hub-side-card {
  margin-top: auto;
  background: var(--nav-side-card-bg);
  border: 1px solid var(--nav-side-card-border);
  border-radius: var(--nav-side-card-radius);
  padding: var(--nav-side-card-padding);
  font-family: var(--nav-font-family);
  font-size: 12px;
  color: var(--nav-side-card-text);
  line-height: 1.5;
}
.hub-side-card-title {
  color: var(--hub-white);
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: -0.005em;
}
.hub-side-card-meta {
  font-size: 11px;
  color: var(--nav-side-card-meta);
}