/* Box-sizing reset (Bootstrap includes this globally) */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  overflow-x: hidden;
}

/* Navbar */
.navbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  position: relative;
}

.navbar > .container,
.navbar > .container-fluid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}

.fixed-top {
  position: sticky;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1030;
}

.navbar-brand {
  display: inline-block;
  padding-top: 0.3125rem;
  padding-bottom: 0.3125rem;
  margin-right: 1rem;
  font-size: 1rem;
  line-height: inherit;
  white-space: nowrap;
  font-weight: 450;
  text-decoration: none;
  color: inherit;
  opacity: 0.95;
}

.navbar-brand:hover, .navbar-brand:focus {
  text-decoration: none;
  color: inherit;
}

.navbar-nav {
  display: flex;
  flex-direction: column;
  padding-left: 0;
  margin-top: 0;
  margin-bottom: 0;
  list-style: none;
}

.nav-item {
  position: relative;
}

button.nav-link {
  background: none;
  border: none;
  appearance: none;
  font: inherit;
}

.nav-link {
  display: block;
  padding: 0.5rem 1rem;
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
  white-space: nowrap;
}

.nav-link:hover, .nav-link:focus {
  text-decoration: none;
  color: var(--text-link);
}

.nav-link.disabled {
  color: var(--text-muted);
  pointer-events: none;
  cursor: default;
}

.navbar-collapse {
  flex-basis: 100%;
  flex-grow: 1;
  align-items: center;
}

.collapse {
  display: none;
}

.collapse.show {
  display: block;
}

.navbar-toggler {
  padding: 0.25rem 0.75rem;
  font-size: 1.25rem;
  line-height: 1;
  background-color: transparent;
  border: 1px solid transparent;
  border-radius: 0.25rem;
  cursor: pointer;
}

.navbar-toggler-icon {
  display: inline-block;
  width: 1.5em;
  height: 1.5em;
  vertical-align: middle;
  background: no-repeat center center;
  background-size: 100% 100%;
}

/* Navbar Light */
.navbar-light .navbar-brand {
  color: rgba(0, 0, 0, 0.65);
}
.navbar-light .navbar-brand:hover, .navbar-light .navbar-brand:focus {
  color: rgba(0, 0, 0, 0.8);
  opacity: 1;
}
.navbar-light .navbar-nav .nav-link {
  color: rgba(0, 0, 0, 0.5);
}
.navbar-light .navbar-nav .nav-link:hover, .navbar-light .navbar-nav .nav-link:focus {
  color: rgba(0, 0, 0, 0.7);
}
.navbar-light .navbar-nav .nav-link.active, .navbar-light .navbar-nav .show > .nav-link {
  color: rgba(0, 0, 0, 0.9);
}
.navbar-light .navbar-toggler {
  color: rgba(0, 0, 0, 0.5);
  border-color: rgba(0, 0, 0, 0.1);
}
.navbar-light .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(0, 0, 0, 0.5)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Navbar Dark */
.navbar-dark .navbar-brand {
  color: rgba(255, 255, 255, 0.75);
}
.navbar-dark .navbar-brand:hover, .navbar-dark .navbar-brand:focus {
  color: #fff;
  opacity: 1;
}
.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.75);
}
.navbar-dark .navbar-nav .nav-link:hover, .navbar-dark .navbar-nav .nav-link:focus {
  color: rgba(255, 255, 255, 1);
}
.navbar-dark .navbar-nav .nav-link.active, .navbar-dark .navbar-nav .show > .nav-link {
  color: #fff;
}
.navbar-dark .navbar-toggler {
  color: rgba(255, 255, 255, 0.5);
  border-color: rgba(255, 255, 255, 0.1);
}
.navbar-dark .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(255, 255, 255, 0.5)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.bg-primary {
  background-image: linear-gradient(var(--nav-from), var(--nav-to));
  background-repeat: no-repeat;
}

body .bg-light {
  background-color: var(--bg-page);
}

body .bg-dark {
  background-color: var(--bg-header);
}

body .ml-auto {
  margin-left: auto;
}

/* Navbar Expand LG */
@media (min-width: 1200px) {
  .navbar-expand-lg {
    flex-flow: row nowrap;
    justify-content: flex-start;
  }
  .navbar-expand-lg > .container,
  .navbar-expand-lg > .container-fluid {
    max-width: none;
    flex-wrap: nowrap;
  }
  .navbar-expand-lg .navbar-nav {
    flex-direction: row;
    align-items: center;
  }
  body .navbar-expand-lg .navbar-collapse {
    display: flex;
    flex-basis: auto;
  }
  /* Brand left, nav centered, controls right */
  .navbar-expand-lg .navbar-nav:not(.ml-auto) {
    flex: 1 1 0;
    justify-content: center;
  }
  /* Align icon + badge vertically inside nav links */
  .navbar-expand-lg .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3em;
  }
  .navbar-expand-lg .navbar-toggler {
    display: none;
  }
}

/* Navbar Expand MD (for TOC sidebar) */
@media (min-width: 768px) {
  .navbar-expand-md {
    flex-flow: row nowrap;
    justify-content: flex-start;
  }
  .navbar-expand-md .navbar-nav {
    flex-direction: row;
  }
  body .navbar-expand-md .navbar-collapse {
    display: flex;
    flex-basis: auto;
  }
  .navbar-expand-md .navbar-toggler {
    display: none;
  }
}

/* Grid */
.container {
  width: 100%;
  padding-right: 0.9375rem;
  padding-left: 0.9375rem;
  margin-right: auto;
  margin-left: auto;
  max-width: 71.25rem;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -0.9375rem;
  margin-left: -0.9375rem;
}

.col-4, .col-8, .col-md-3, .col-md-8, .col-md-9, .col-md-12 {
  position: relative;
  width: 100%;
  padding-right: 0.9375rem;
  padding-left: 0.9375rem;
}

.col-4 {
  flex: 0 0 33.333333%;
  max-width: 33.333333%;
}

.col-8 {
  flex: 0 0 66.666667%;
  max-width: 66.666667%;
}

@media (min-width: 768px) {
  .col-md-3 {
    flex: 0 0 25%;
    max-width: 25%;
  }
  .col-md-8 {
    flex: 0 0 66.666667%;
    max-width: 66.666667%;
  }
  .col-md-9 {
    flex: 0 0 75%;
    max-width: 75%;
  }
  .col-md-12 {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

body .align-items-center {
  align-items: center;
}

body .text-right {
  text-align: right;
}

/* Dropdowns */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  white-space: nowrap;
  cursor: pointer;
}

.dropdown-toggle::after {
  display: inline-block;
  margin-left: 0.255em;
  vertical-align: 0.255em;
  content: "";
  border-top: 0.3em solid;
  border-right: 0.3em solid transparent;
  border-bottom: 0;
  border-left: 0.3em solid transparent;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 10rem;
  padding: 0.5rem 0;
  margin: 0.125rem 0 0;
  font-size: 1rem;
  color: var(--text-primary);
  text-align: left;
  list-style: none;
  background-color: var(--bg-zettel);
  background-clip: padding-box;
  border: 1px solid var(--border-accent);
  border-radius: 0.25rem;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.dropdown-menu.show {
  display: block;
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: 0.25rem 1.5rem;
  clear: both;
  font-weight: 400;
  color: var(--text-primary);
  text-align: inherit;
  white-space: nowrap;
  background-color: transparent;
  border: 0;
  text-decoration: none;
}

.dropdown-item:hover, .dropdown-item:focus {
  color: var(--text-primary);
  text-decoration: none;
  background-color: var(--bg-accent);
}

.dropdown-item.active, .dropdown-item:active {
  color: var(--bg-page);
  text-decoration: none;
  background-color: var(--text-link);
}

/* Submenus (used in nav-sub.html) */
.dropdown-submenu {
  position: relative;
}

.dropdown-submenu > .dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -0.375rem;
  margin-left: -0.0625rem;
}

.dropdown-submenu:hover > .dropdown-menu,
.dropdown-submenu:focus-within > .dropdown-menu {
  display: block;
}

/* Dialog/Modal */
dialog {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90vw;
  max-width: 31.25rem;
  max-height: 90vh;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0.5rem;
  background: var(--bg-zettel);
  color: var(--text-primary);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.5);
  z-index: 1050;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

dialog[open] {
  display: flex;
  flex-direction: column;
}

dialog.modal-lg {
  max-width: 50rem;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--border-accent);
  border-top-left-radius: 0.5rem;
  border-top-right-radius: 0.5rem;
}

.modal-title {
  margin-bottom: 0;
  line-height: 1.5;
  font-size: 1.25rem;
  font-weight: 500;
}

.modal-close {
  padding: 0;
  background-color: transparent;
  border: 0;
  float: right;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--text-muted);
  text-shadow: 0 1px 0 var(--bg-zettel);
  opacity: .5;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
  text-decoration: none;
  opacity: .75;
}

.modal-body {
  position: relative;
  flex: 1 1 auto;
  padding: 1rem;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-accent);
  border-bottom-right-radius: 0.5rem;
  border-bottom-left-radius: 0.5rem;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-control {
  display: block;
  width: 100%;
  height: calc(1.5em + 0.75rem + 0.125rem);
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-zettel);
  background-clip: padding-box;
  border: 1px solid var(--border-accent);
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  color: var(--text-primary);
  background-color: var(--bg-zettel);
  border-color: var(--text-link);
  outline: 0;
  box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--text-link) 25%, transparent);
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 400;
  color: var(--text-primary);
  text-align: center;
  vertical-align: middle;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 0.25rem;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  text-decoration: none;
  cursor: pointer;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  border-radius: 0.2rem;
}

.btn-outline-secondary {
  color: var(--text-muted);
  border-color: var(--border-accent);
}

.btn-outline-secondary:hover {
  color: var(--text-primary);
  background-color: var(--bg-accent);
  border-color: var(--border-accent);
}

.btn-outline-success {
  color: var(--adm-note-text);
  border-color: var(--adm-note-text);
}

.btn-outline-success:hover {
  color: var(--bg-page);
  background-color: var(--adm-note-text);
  border-color: var(--adm-note-text);
}

.btn-outline-danger {
  color: var(--adm-danger-text);
  border-color: var(--adm-danger-text);
}

.btn-outline-danger:hover {
  color: var(--bg-page);
  background-color: var(--adm-danger-text);
  border-color: var(--adm-danger-text);
}

/* Tables */
.table {
  width: 100%;
  margin-bottom: 1rem;
  color: var(--text-primary);
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid var(--border-accent);
}

.table thead th {
  vertical-align: bottom;
  border-bottom: 2px solid var(--border-accent);
}

.table-striped tbody tr:nth-of-type(odd) {
  background-color: var(--bg-accent);
}

.table-hover tbody tr:hover {
  background-color: var(--bg-accent);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25em 0.4em;
  font-size: 75%;
  font-weight: 700;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  border-radius: 0.25rem;
}

.badge-warning {
  color: var(--adm-warning-text);
  background-color: var(--adm-warning-bg);
  font-size: 0.6rem;
  padding: 0.15em 0.35em;
  position: absolute;
  top: 0;
  right: 0;
  transform: translate(40%, -20%);
  border-radius: 0.5rem;
  min-width: 0.8rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.nav-icon-badge {
  position: relative;
  display: inline-block;
}

/* Cards (used in TOC) */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: var(--bg-zettel);
  background-clip: border-box;
  border: 1px solid var(--border-accent);
  border-radius: 0.25rem;
}


/* Utilities */
body .show {
  display: block;
}

.active {
  /* Context dependent, usually handled by component styles */
}

.disabled {
  opacity: 0.65;
  pointer-events: none;
}

.visually-hidden {
  position: absolute !important;
  width: 0.0625rem !important;
  height: 0.0625rem !important;
  padding: 0 !important;
  margin: -0.0625rem !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

body .flex-column {
  flex-direction: column;
}

@media print {
  .hidden-print {
    display: none !important;
  }
}

/* Sidebar Navigation */
.sidebar-toggle {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: color 0.15s ease;
}

.navbar-light .sidebar-toggle {
  color: rgba(0, 0, 0, 0.4);
}

.navbar-light .sidebar-toggle:hover {
  color: rgba(0, 0, 0, 0.7);
}

.navbar-dark .sidebar-toggle {
  color: rgba(255, 255, 255, 0.5);
}

.navbar-dark .sidebar-toggle:hover {
  color: rgba(255, 255, 255, 0.85);
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1042;
  background-color: rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.sidebar-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1045;
  width: 18rem;
  height: 100vh;
  background-color: var(--bg-zettel);
  border-right: 1px solid var(--border-accent);
  box-shadow: 0.25rem 0 1rem rgba(0, 0, 0, 0.15);
  transform: translateX(-100%);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

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

.sidebar-header {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-accent);
  flex-shrink: 0;
}

.sidebar-title {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-close {
  width: 1.75rem;
  height: 1.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: 0;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.sidebar-close:hover {
  color: var(--text-primary);
}

.sidebar-tree {
  list-style: none;
  padding: 0.5rem 0;
  margin: 0;
  overflow-y: auto;
  flex: 1;
}

.sidebar-tree ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-subtree {
  display: none;
}

.sidebar-subtree.expanded {
  display: block;
}

.sidebar-section-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  padding: 0.375rem 1rem;
  border: 0;
  background-color: transparent;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
}

.sidebar-section-toggle:hover {
  background-color: var(--bg-accent);
}

.sidebar-chevron {
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
  background: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' d='M6 3l5 5-5 5'/%3e%3c/svg%3e") no-repeat center center;
  background-size: 0.75rem 0.75rem;
  transition: transform 0.15s ease;
}

.sidebar-section-toggle.open .sidebar-chevron {
  transform: rotate(90deg);
}

/* Indentation levels */
.sidebar-tree > .sidebar-section > .sidebar-section-toggle,
.sidebar-tree > .sidebar-leaf > .sidebar-link {
  padding-left: 1rem;
}

.sidebar-tree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-section-toggle,
.sidebar-tree > .sidebar-section > .sidebar-subtree > .sidebar-leaf > .sidebar-link {
  padding-left: 2rem;
}

.sidebar-tree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-section-toggle,
.sidebar-tree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-subtree > .sidebar-leaf > .sidebar-link {
  padding-left: 3rem;
}

.sidebar-tree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-section-toggle,
.sidebar-tree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-subtree > .sidebar-section > .sidebar-subtree > .sidebar-leaf > .sidebar-link {
  padding-left: 4rem;
}

.sidebar-link {
  display: block;
  padding: 0.375rem 1rem 0.375rem 2.25rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  text-decoration: none;
}

.sidebar-link:hover {
  color: var(--text-primary);
  background-color: var(--bg-accent);
  text-decoration: none;
}

.sidebar-link.active {
  color: var(--text-link);
  font-weight: 500;
}

/* Sidebar-mode navbar adjustments */
.navbar.sidebar-mode > .container {
  flex-wrap: nowrap;
}

body .navbar.sidebar-mode .navbar-collapse {
  display: flex;
  flex-basis: auto;
}

.navbar.sidebar-mode .navbar-brand {
  margin-left: 0.5rem;
}

.navbar.sidebar-mode .navbar-nav.ml-auto {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.navbar.sidebar-mode .navbar-nav.ml-auto .nav-link {
  padding: 0.5rem 0.5rem;
}

@media (max-width: 599px) {
  .navbar.sidebar-mode .navbar-nav.ml-auto .nav-link {
    padding: 0.5rem 0.25rem;
  }
}