/* Simplified Bootstrap CSS for essential styling */

/* Grid System */
.container, .container-fluid {
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
  margin-right: auto;
  margin-left: auto;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

.col-md-3, .col-md-9, .col-lg-2, .col-lg-10 {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}

.col-md-3, .col-lg-2 {
  flex: 0 0 25%;
  max-width: 25%;
}

.col-md-9, .col-lg-10 {
  flex: 0 0 75%;
  max-width: 75%;
}

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

.navbar-dark {
  --bs-navbar-color: rgba(255, 255, 255, 0.55);
  --bs-navbar-hover-color: rgba(255, 255, 255, 0.75);
  --bs-navbar-disabled-color: rgba(255, 255, 255, 0.25);
  --bs-navbar-active-color: #fff;
  --bs-navbar-brand-color: #fff;
  --bs-navbar-brand-hover-color: #fff;
  --bs-navbar-toggler-border-color: rgba(255, 255, 255, 0.1);
  --bs-navbar-toggler-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.55%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.bg-primary {
  background-color: #0d6efd !important;
}

.navbar-brand {
  padding-top: 0.3125rem;
  padding-bottom: 0.3125rem;
  margin-right: 1rem;
  font-size: 1.25rem;
  text-decoration: none;
  white-space: nowrap;
}

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

.nav-item {
  margin: 0 5px;
}

.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 {
  text-decoration: none;
}

/* Form Controls */
.form-control {
  display: block;
  width: 100%;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  border-radius: 0.25rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

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

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  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;
}

.btn-primary {
  color: #fff;
  background-color: #0d6efd;
  border-color: #0d6efd;
}

.btn-primary:hover {
  color: #fff;
  background-color: #0b5ed7;
  border-color: #0a58ca;
}

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

.btn-close {
  box-sizing: content-box;
  width: 1em;
  height: 1em;
  padding: 0.25em 0.25em;
  color: #000;
  background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/%3e%3c/svg%3e") center/1em auto no-repeat;
  border: 0;
  border-radius: 0.25rem;
  opacity: 0.5;
}

/* Toast */
.toast {
  width: 350px;
  max-width: 100%;
  font-size: 0.875rem;
  pointer-events: auto;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  border-radius: 0.5rem;
  opacity: 0;
}

.toast.show {
  opacity: 1;
}

.toast-container {
  position: absolute;
  z-index: 1090;
  width: max-content;
  max-width: 100%;
  pointer-events: none;
}

.toast-header {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  color: #6c757d;
  background-clip: padding-box;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  border-top-left-radius: calc(0.5rem - 1px);
  border-top-right-radius: calc(0.5rem - 1px);
}

.toast-body {
  padding: 0.75rem;
  word-wrap: break-word;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1055;
  display: none;
  width: 100%;
  height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  outline: 0;
}

.modal.show {
  display: block;
}

.modal-dialog {
  position: relative;
  width: auto;
  margin: 0.5rem;
  pointer-events: none;
}

.modal-content {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  pointer-events: auto;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 0.3rem;
  outline: 0;
}

.modal-header {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem;
  border-bottom: 1px solid #dee2e6;
  border-top-left-radius: calc(0.3rem - 1px);
  border-top-right-radius: calc(0.3rem - 1px);
}

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

.modal-footer {
  display: flex;
  flex-wrap: wrap;
  flex-shrink: 0;
  align-items: center;
  justify-content: flex-end;
  padding: 0.75rem;
  border-top: 1px solid #dee2e6;
  border-bottom-right-radius: calc(0.3rem - 1px);
  border-bottom-left-radius: calc(0.3rem - 1px);
}

/* Utilities */
.d-flex {
  display: flex !important;
}

.justify-content-between {
  justify-content: space-between !important;
}

.text-center {
  text-align: center !important;
}

.text-white {
  color: #fff !important;
}

.bg-danger {
  background-color: #dc3545 !important;
}

.bg-success {
  background-color: #198754 !important;
}

.bg-info {
  background-color: #0dcaf0 !important;
}

.position-fixed {
  position: fixed !important;
}

.position-sticky {
  position: sticky !important;
}

.top-0 {
  top: 0 !important;
}

.end-0 {
  right: 0 !important;
}

.w-100 {
  width: 100% !important;
}

.mb-3 {
  margin-bottom: 1rem !important;
}

.mb-4 {
  margin-bottom: 1.5rem !important;
}

.me-auto {
  margin-right: auto !important;
}

.ms-sm-auto {
  margin-left: auto !important;
}

.px-md-4 {
  padding-right: 1.5rem !important;
  padding-left: 1.5rem !important;
}

.pt-3 {
  padding-top: 1rem !important;
}

/* Layout */
.app-container {
  min-height: 100vh;
}

.main-content {
  margin-top: 20px;
}

/* Responsive */
@media (min-width: 768px) {
  .container-fluid {
    max-width: 100%;
  }
  
  .d-md-block {
    display: block !important;
  }
  
  .d-none {
    display: none !important;
  }
  
  /* 确保桌面视图中导航栏默认展开 */
  .navbar-collapse {
    display: block !important;
    flex-basis: auto;
  }
  
  .navbar-nav {
    flex-direction: row;
  }
  
  .navbar-nav .nav-item {
    margin-right: 1rem;
  }
  
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 48px 0 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, 0.1);
  }
  
  .main-area {
    margin-left: 200px;
    margin-top: 56px;
  }
}

/* Navbar components */
.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;
}

.navbar-toggler:hover,
.navbar-toggler:focus {
  text-decoration: none;
}

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

.navbar-nav .dropdown-menu {
  position: absolute;
}

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

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

.collapse {
  display: none;
}

.collapse.show {
  display: block;
}

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

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  min-width: 10rem;
  padding: 0.5rem 0;
  margin: 0.125rem 0 0;
  font-size: 1rem;
  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-item {
  display: block;
  width: 100%;
  padding: 0.25rem 1rem;
  clear: both;
  font-weight: 400;
  color: #212529;
  text-align: inherit;
  text-decoration: none;
  white-space: nowrap;
  background-color: transparent;
  border: 0;
}

.dropdown-item:hover, .dropdown-item:focus {
  color: #1e2125;
  background-color: #e9ecef;
}

.dropdown-divider {
  height: 0;
  margin: 0.5rem 0;
  overflow: hidden;
  border-top: 1px solid rgba(0, 0, 0, 0.15);
}

/* Fallback for any missing styles */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  text-align: left;
  background-color: #fff;
}