/* Persistent desktop rail and responsive mobile drawer navigation. */

:where(.nav-item, .m-tab) {
  font-family: var(--font-ui);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

/* Tracking stays reachable while disabled, with availability expressed visually. */
body:not(.tracking-enabled) .nav-item[data-tracking-only]:not(.active) .nav-item-label,
body:not(.tracking-enabled) .m-tab[data-tracking-only]:not(.active),
body:not(.tracking-enabled) .nav-group-title[data-tracking-only] {
  color: var(--color-text-muted);
}
body:not(.tracking-enabled) .nav-item[data-tracking-only]:not(.active) .nav-item-icon {
  opacity: 0.65;
}
body:not(.tracking-enabled) [data-tracking-enabled-only] { display: none; }

/* A shared session (#290 B3b) never sees what its access doesn't cover. */
body.shared-access [data-access-hidden] { display: none; }

.nav-item[data-page="tracking"] .nav-item-label::after,
.m-tab[data-page="tracking"]::after {
  margin-left: 6px;
  padding: 1px 6px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: var(--color-surface-soft);
  color: var(--color-text-muted);
  font-size: var(--font-size-compact);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: 1px;
}
body:not(.tracking-enabled) .nav-item[data-page="tracking"] .nav-item-label::after,
body:not(.tracking-enabled) .m-tab[data-page="tracking"]::after { content: 'Off'; }
body.tracking-enabled .nav-item[data-page="tracking"] .nav-item-label::after,
body.tracking-enabled .m-tab[data-page="tracking"]::after {
  content: 'On';
  border-color: var(--green);
  background: var(--green-light);
  color: var(--green);
}

.mobile-page-menu[hidden] { display: none; }
.mobile-drawer-backdrop { display: none; }

.planner-nav {
  position: relative;
  width: 230px;
  flex-shrink: 0;
  border-radius: var(--radius-lg);
  padding: 14px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  transition: width var(--transition-med), padding var(--transition-med);
}
.planner-nav.collapsed {
  width: 60px;
  padding-left: 8px;
  padding-right: 8px;
}

.planner-nav-scroll-frame {
  --scroll-cue-color: var(--color-surface);
  flex: 1;
  overflow: hidden;
}
.planner-nav-scroll {
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
}

.nav-collapse-toggle {
  position: absolute;
  top: 14px;
  right: -13px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border-radius: 50%;
  border: var(--border-thin);
  background: var(--color-surface);
  box-shadow: var(--shadow-subtle);
  color: var(--color-text-muted);
  cursor: pointer;
  z-index: 1;
}
.nav-collapse-toggle:hover { color: var(--color-action); }
.nav-collapse-toggle svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition-fast);
}
.planner-nav.collapsed .nav-collapse-toggle svg { transform: rotate(180deg); }

.nav-group-title { margin: 2px 4px 8px; }
.nav-group-title-spaced {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-action-subtle);
}
.planner-nav.collapsed .nav-group-title {
  height: 0;
  margin: 10px 6px;
  padding: 0;
  font-size: 0;
  line-height: 0;
  overflow: hidden;
}
.planner-nav.collapsed .nav-group-title-spaced {
  border-top: 1px solid var(--color-line);
  padding-top: 10px;
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  background: transparent;
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: left;
}
.nav-item:hover { background: var(--color-action-subtle); color: var(--color-action); }
.nav-item.active { background: var(--color-action); color: #fff; }
.nav-item-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.planner-nav.collapsed .nav-item {
  justify-content: center;
  gap: 0;
  padding: 10px 0;
}
.planner-nav.collapsed .nav-item-label { display: none; }

.nav-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}
.planner-nav-footer {
  flex: none;
  padding-top: 14px;
  border-top: 1px solid var(--color-action-subtle);
  background: var(--color-surface);
}
.planner-nav-footer > .save-status { margin-top: var(--space-2); }
.save-status {
  min-height: 18px;
  color: var(--text-light);
  font-size: var(--font-size-supporting);
  font-weight: 500;
  text-align: center;
  transition: color 0.3s;
}
.save-status.saving { color: var(--accent); }
.save-status.saved { color: var(--green); }
.save-status.dirty {
  color: var(--accent);
  font-weight: 700;
}
.save-status.error { color: var(--red); }
.planner-nav.collapsed .nav-actions { grid-template-columns: 1fr; }
.planner-nav.collapsed .nav-actions button {
  padding-left: 0;
  padding-right: 0;
}
.planner-nav.collapsed .nav-actions .btn-label,
.planner-nav.collapsed .save-status,
.planner-nav.collapsed .freshness-marker-actions { display: none; }

.mobile-drawer-actions > .freshness-marker-actions { grid-column: 1 / -1; }
.nav-actions + .freshness-marker-actions { margin-top: var(--space-2); }

/* A near-full-height laptop only needs the accumulated height of the longer
   destination list trimmed, without changing the surrounding shell. */
@media (min-width: 1025px) and (max-height: 1100px) {
  .nav-item {
    padding-top: 9px;
    padding-bottom: 9px;
  }
  .nav-group-title { margin-bottom: 6px; }
  .nav-group-title-spaced {
    margin-top: 14px;
    padding-top: 14px;
  }
  .planner-nav-footer > .save-status:empty {
    min-height: 0;
    margin-top: 0;
  }
}

/* Preserve the full labelled rail on standard laptop screens without making
   users scroll merely to reach another destination. */
@media (min-width: 1025px) and (max-height: 1000px) {
  .planner-nav {
    padding-top: 8px;
    padding-bottom: 8px;
  }
  .nav-item {
    padding-top: 7px;
    padding-bottom: 7px;
  }
  .nav-group-title { margin-bottom: 4px; }
  .nav-group-title-spaced {
    margin-top: 8px;
    padding-top: 8px;
  }
  .planner-nav-footer { padding-top: 8px; }
  .nav-actions { gap: 4px; }
  .nav-actions .btn {
    gap: 3px;
    padding-left: 3px;
    padding-right: 3px;
  }
  .planner-nav.collapsed .nav-actions { grid-template-columns: 1fr; }
}

@media (min-width: 1025px) and (max-height: 800px) {
  .planner-nav {
    padding-top: 4px;
    padding-bottom: 4px;
  }
  .nav-item {
    padding-top: 6px;
    padding-bottom: 6px;
  }
  .nav-group-title { margin-bottom: 2px; }
  .nav-group-title-spaced {
    margin-top: 5px;
    padding-top: 5px;
  }
}

@media (max-width: 1024px) {
  html.mobile-menu-open,
  body.mobile-menu-open {
    overflow: hidden;
    overscroll-behavior: none;
  }
  .planner-nav { display: none; }

  .m-tab {
    flex: 1;
    padding: 11px 6px;
    background: transparent;
    border: none;
    border-radius: 8px;
    font-family: 'DM Sans', sans-serif;
    font-size: var(--font-size-supporting);
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
  }
  .m-tab.active {
    background: var(--navy);
    color: var(--accent);
    font-weight: 600;
  }

  .mobile-drawer-backdrop[hidden],
  .mobile-page-menu[hidden] { display: none; }
  .mobile-drawer-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15,30,60,0.42);
    z-index: var(--z-drawer-backdrop);
    opacity: 0;
    transition: opacity var(--transition-med);
  }
  .mobile-drawer-backdrop.open { opacity: 1; }

  .mobile-page-menu {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100dvh;
    max-height: 100dvh;
    z-index: var(--z-drawer);
    width: min(320px, 84vw);
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 12px 12px calc(10px + env(safe-area-inset-bottom, 0px));
    border-left: var(--border-thin);
    background: var(--color-surface);
    box-shadow: -10px 0 34px rgba(15,30,60,0.18);
    overflow: hidden;
    overscroll-behavior: none;
    transform: translateX(100%);
    transition: transform var(--transition-med);
  }
  .mobile-page-menu.open { transform: translateX(0); }

  .nav-section { border-bottom: 1px solid var(--border); }
  .nav-section:last-of-type { border-bottom: 0; }
  .nav-section-summary {
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-height: 44px;
    padding: 4px 4px 4px 2px;
    cursor: pointer;
    list-style: none;
  }
  .nav-section-summary::-webkit-details-marker { display: none; }
  .nav-section-summary .nav-group-title { margin: 0; }

  @supports (interpolate-size: allow-keywords) and (transition-behavior: allow-discrete) {
    .mobile-drawer-content { interpolate-size: allow-keywords; }
    .nav-section::details-content {
      block-size: 0;
      overflow: hidden;
      transition: block-size 180ms ease, content-visibility 180ms allow-discrete;
    }
    .nav-section[open]::details-content { block-size: auto; }
    @media (prefers-reduced-motion: reduce) {
      .nav-section::details-content { transition: none; }
    }
  }

  .nav-section:not([open]):has(.m-tab.active) .nav-group-title { color: var(--color-text); }
  .nav-section:not([open]):has(.m-tab.active) .nav-group-title::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-left: 6px;
    vertical-align: middle;
    border-radius: 50%;
    background: var(--navy);
  }

  .mobile-drawer-content {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    gap: 3px;
    min-height: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }
  .mobile-drawer-profile {
    flex: 0 0 auto;
    padding: 10px 0 13px;
    border-bottom: 1px solid var(--color-action-subtle);
  }
  .mobile-profile-link {
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr) 20px;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 62px;
    padding: 9px 10px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: var(--color-surface-soft);
    color: var(--color-text);
    font-family: var(--font-ui);
    text-align: left;
    cursor: pointer;
  }
  .mobile-profile-link:hover,
  .mobile-profile-link.active {
    border-color: var(--color-action);
    background: var(--color-action-subtle);
  }
  .mobile-profile-icon {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-surface);
    color: var(--color-action);
  }
  .mobile-profile-icon svg,
  .mobile-profile-chevron {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .mobile-profile-details { display: grid; gap: 2px; min-width: 0; }
  .mobile-profile-name,
  .mobile-profile-email { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .mobile-profile-name { font-weight: 700; }
  .mobile-profile-email { color: var(--color-text-muted); font-size: var(--font-size-compact); }
  .mobile-profile-email:empty { display: none; }
  .mobile-profile-chevron { transform: rotate(180deg); color: var(--color-text-muted); }
  .mobile-page-menu .nav-group-title {
    margin: 4px 4px 2px;
    font-size: var(--font-size-compact);
    line-height: 1;
  }
  .mobile-page-menu .nav-group-title-spaced {
    margin-top: 5px;
    padding-top: 5px;
  }

  .mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0 4px;
    margin-bottom: 0;
    border-bottom: 1px solid var(--color-action-subtle);
  }
  .mobile-drawer-title {
    color: var(--color-text);
    font-family: var(--font-ui);
    font-size: var(--font-size-supporting);
  }
  .mobile-page-menu .m-tab {
    width: 100%;
    flex: none;
    padding: 10.5px 12px;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text-muted);
    font-size: var(--font-size-supporting);
    font-weight: 600;
    line-height: 1.15;
    text-align: left;
    white-space: normal;
  }
  .mobile-page-menu .m-tab.active { background: var(--color-action); color: #fff; }

  .mobile-drawer-actions {
    display: grid;
    flex: 0 0 auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 0;
    padding-top: 8px;
    border-top: 1px solid var(--color-action-subtle);
    background: var(--color-surface);
  }
}