/* Sidebar navigation, ported from the workshops site so the two subsites match.
   Loaded after the shared theme's site.css and only overrides what the sidebar
   needs: a fixed header, and content shifted right to make room. Colors and
   type all come from the theme's variables. */

:root {
  --sidebar-width: 280px;
}

/* Header has to be fixed so the sidebar can sit under it */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
}

.site-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.hamburger {
  display: block;
  width: 24px;
  height: 3px;
  background: white;
  position: relative;
  transition: background 0.2s;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 3px;
  background: white;
  transition: transform 0.2s;
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

.nav-toggle.active .hamburger { background: transparent; }
.nav-toggle.active .hamburger::before { transform: translateY(8px) rotate(45deg); }
.nav-toggle.active .hamburger::after { transform: translateY(-8px) rotate(-45deg); }

/* Page layout */
.page-wrapper {
  display: flex;
  padding-top: var(--header-height);
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  /* 100vh on mobile browsers reflects the LARGEST viewport — chrome hidden —
     so the bottom ends up under the URL bar. 100dvh tracks what's visible. */
  height: calc(100vh - var(--header-height));
  height: calc(100dvh - var(--header-height));
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--spacing-unit) 0 calc(var(--spacing-unit) + env(safe-area-inset-bottom));
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  max-width: calc(100% - var(--sidebar-width));
}

/* Navigation */
.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item > a {
  display: block;
  padding: 0.75rem var(--spacing-unit);
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  border-left: 3px solid transparent;
  transition: all 0.2s;
}

.nav-item.has-subnav > .nav-item-header {
  display: flex;
  align-items: center;
  border-left: 3px solid transparent;
  transition: all 0.2s;
}

.nav-item.has-subnav > .nav-item-header > a {
  flex: 1;
  padding: 0.75rem var(--spacing-unit);
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  border-left: none;
}

.nav-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-right: 0.5rem;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s;
}

.nav-toggle-btn:hover {
  background: var(--bg-tertiary);
  color: var(--primary-color);
}

.nav-chevron { transition: transform 0.2s ease; }
.nav-item.expanded .nav-chevron { transform: rotate(180deg); }

.nav-item > a:hover,
.nav-item.active > a,
.nav-item.has-subnav > .nav-item-header:hover,
.nav-item.has-subnav.active > .nav-item-header {
  background: var(--bg-tertiary);
  border-left-color: var(--primary-color);
}

.nav-item.has-subnav > .nav-item-header:hover > a,
.nav-item.has-subnav.active > .nav-item-header > a {
  color: var(--primary-color);
}

.nav-subnav {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.nav-item.expanded .nav-subnav { max-height: 500px; }

.nav-subitem > a {
  display: block;
  padding: 0.5rem var(--spacing-unit) 0.5rem calc(var(--spacing-unit) * 1.5);
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-subitem > a:hover,
.nav-subitem > a.active { color: var(--primary-color); }

.nav-section-title {
  display: block;
  padding: 0.75rem var(--spacing-unit) 0.25rem calc(var(--spacing-unit) * 1.5);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-items a {
  display: block;
  padding: 0.4rem var(--spacing-unit) 0.4rem calc(var(--spacing-unit) * 2);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-items a:hover,
.nav-items a.active { color: var(--primary-color); }

@media (max-width: 900px) {
  .nav-toggle { display: block; }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
  }

  .sidebar.open { transform: translateX(0); }

  .main-content {
    margin-left: 0;
    max-width: 100%;
  }
}

/* Coaches print the build instructions; the chrome shouldn't come with it. */
@media print {
  .site-header,
  .sidebar,
  .nav-toggle,
  .site-footer { display: none !important; }

  .page-wrapper { padding-top: 0; }

  .main-content {
    margin-left: 0 !important;
    max-width: 100% !important;
    padding: 0 !important;
  }
}