/* ===============================================
   BOOTSTRAP COMPONENTS - Essential Base Structures
   Extracted from Bootstrap 4.6.1 for CaveSync
   Custom overrides are in components.css
   =============================================== */

/* Buttons - Base structure only */
.btn {
  display: inline-block;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 0.9375rem;
  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;
  cursor: pointer;
}

.btn:hover {
  text-decoration: none;
}

.btn:focus {
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

.btn:disabled,
.btn.disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.btn-primary {
  color: #fff;
  background-color: #2563eb;
  border-color: #2563eb;
}

.btn-primary:hover {
  background-color: #1d4ed8;
  border-color: #1e40af;
}

.btn-secondary {
  color: #fff;
  background-color: #6c757d;
  border-color: #6c757d;
}

.btn-secondary:hover {
  background-color: #5a6268;
  border-color: #545b62;
}

.btn-success {
  color: #fff;
  background-color: #0acb8e;
  border-color: #0acb8e;
}

.btn-danger {
  color: #fff;
  background-color: #fe5461;
  border-color: #fe5461;
}

.btn-outline-primary {
  color: #2563eb;
  border-color: #2563eb;
  background-color: transparent;
}

.btn-outline-primary:hover {
  color: #fff;
  background-color: #2563eb;
  border-color: #2563eb;
}

.btn-outline-secondary {
  color: #6c757d;
  border-color: #6c757d;
  background-color: transparent;
}

.btn-outline-secondary:hover {
  color: #fff;
  background-color: #6c757d;
  border-color: #6c757d;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.82rem;
  line-height: 1.5;
  border-radius: 0.2rem;
}

.btn-lg {
  padding: 0.5rem 1rem;
  font-size: 1.17rem;
  line-height: 1.5;
  border-radius: 0.3rem;
}

.btn-block {
  display: block;
  width: 100%;
}

/* Button Groups */
.btn-group {
  position: relative;
  display: inline-flex;
  vertical-align: middle;
}

.btn-group > .btn {
  position: relative;
  flex: 1 1 auto;
}

/* Cards - Base structure */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: #fff;
  background-clip: border-box;
  border: 1px solid rgba(0, 0, 0, 0.125);
  border-radius: 0.25rem;
}

.card-body {
  flex: 1 1 auto;
  padding: 1.25rem;
}

.card-title {
  margin-bottom: 0.75rem;
}

.card-subtitle {
  margin-top: -0.375rem;
  margin-bottom: 0;
}

.card-text:last-child {
  margin-bottom: 0;
}

.card-header {
  padding: 0.75rem 1.25rem;
  margin-bottom: 0;
  background-color: rgba(0, 0, 0, 0.03);
  border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.card-header:first-child {
  border-radius: calc(0.25rem - 1px) calc(0.25rem - 1px) 0 0;
}

.card-footer {
  padding: 0.75rem 1.25rem;
  background-color: rgba(0, 0, 0, 0.03);
  border-top: 1px solid rgba(0, 0, 0, 0.125);
}

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

.form-label {
  display: inline-block;
  margin-bottom: 0.5rem;
}

.form-control {
  display: block;
  width: 100%;
  padding: 0.375rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  color: #495057;
  background-color: #fff;
  border-color: #80bdff;
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

.form-control:disabled,
.form-control[readonly] {
  background-color: #e9ecef;
  opacity: 1;
}

.form-select {
  display: block;
  width: 100%;
  padding: 0.375rem 2.25rem 0.375rem 0.75rem;
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-check {
  position: relative;
  display: block;
  padding-left: 1.25rem;
}

.form-check-input {
  position: absolute;
  margin-top: 0.3rem;
  margin-left: -1.25rem;
}

.form-check-label {
  margin-bottom: 0;
}

/* Input groups */
.input-group {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  width: 100%;
}

.input-group > .form-control {
  position: relative;
  flex: 1 1 auto;
  width: 1%;
  min-width: 0;
  margin-bottom: 0;
}

/* Tables - Base structure */
.table {
  width: 100%;
  margin-bottom: 1rem;
  color: #212529;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid #dee2e6;
}

.table thead th {
  vertical-align: bottom;
  border-bottom: 2px solid #dee2e6;
}

.table tbody + tbody {
  border-top: 2px solid #dee2e6;
}

.table-sm th,
.table-sm td {
  padding: 0.3rem;
}

.table-bordered {
  border: 1px solid #dee2e6;
}

.table-bordered th,
.table-bordered td {
  border: 1px solid #dee2e6;
}

.table-striped tbody tr:nth-of-type(odd) {
  background-color: rgba(0, 0, 0, 0.05);
}

.table-hover tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.075);
}

/* 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: baseline;
  border-radius: 0.25rem;
}

.badge:empty {
  display: none;
}

.badge-pill {
  padding-right: 0.6em;
  padding-left: 0.6em;
  border-radius: 10rem;
}

/* Alerts */
.alert {
  position: relative;
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
  border-radius: 0.25rem;
}

.alert-success {
  color: #155724;
  background-color: #d4edda;
  border-color: #c3e6cb;
}

.alert-danger {
  color: #721c24;
  background-color: #f8d7da;
  border-color: #f5c6cb;
}

.alert-warning {
  color: #856404;
  background-color: #fff3cd;
  border-color: #ffeeba;
}

.alert-info {
  color: #0c5460;
  background-color: #d1ecf1;
  border-color: #bee5eb;
}

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

.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: 0.9375rem;
  color: #212529;
  text-align: left;
  list-style: none;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 0.25rem;
}

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

.dropdown-menu-end {
  right: 0;
  left: auto;
}

.dropdown-item {
  display: block;
  width: 100%;
  padding: 0.25rem 1.5rem;
  clear: both;
  font-weight: 400;
  color: #212529;
  text-align: inherit;
  white-space: nowrap;
  background-color: transparent;
  border: 0;
  cursor: pointer;
}

.dropdown-item:hover,
.dropdown-item:focus {
  color: #16181b;
  text-decoration: none;
  background-color: #f8f9fa;
}

.dropdown-divider {
  height: 0;
  margin: 0.5rem 0;
  overflow: hidden;
  border-top: 1px solid #e9ecef;
}

/* List Group */
.list-group {
  display: flex;
  flex-direction: column;
  padding-left: 0;
  margin-bottom: 0;
}

.list-group-item {
  position: relative;
  display: block;
  padding: 0.75rem 1.25rem;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.125);
}

.list-group-item:first-child {
  border-top-left-radius: 0.25rem;
  border-top-right-radius: 0.25rem;
}

.list-group-item:last-child {
  border-bottom-right-radius: 0.25rem;
  border-bottom-left-radius: 0.25rem;
}

.list-group-item + .list-group-item {
  border-top-width: 0;
}

.list-group-item-action {
  width: 100%;
  color: #495057;
  text-align: inherit;
}

.list-group-item-action:hover {
  color: #495057;
  text-decoration: none;
  background-color: #f8f9fa;
}

/* Nav */
.nav {
  display: flex;
  flex-wrap: wrap;
  padding-left: 0;
  margin-bottom: 0;
  list-style: none;
}

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

.nav-link:hover,
.nav-link:focus {
  text-decoration: none;
}

.nav-link.disabled {
  color: #6c757d;
  pointer-events: none;
  cursor: default;
}

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

.navbar-brand {
  display: inline-block;
  padding-top: 0.3125rem;
  padding-bottom: 0.3125rem;
  margin-right: 1rem;
  font-size: 1.25rem;
  line-height: inherit;
  white-space: nowrap;
}

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

.navbar-nav .nav-link {
  padding-right: 0;
  padding-left: 0;
}

/* Spinner */
.spinner-border {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  vertical-align: text-bottom;
  border: 0.25em solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spinner-border 0.75s linear infinite;
}

.spinner-border-sm {
  width: 1rem;
  height: 1rem;
  border-width: 0.2em;
}

@keyframes spinner-border {
  to { transform: rotate(360deg); }
}

/* Visually Hidden */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}