:root {
  color-scheme: light;
  --bg-page: #f8f9fa;
  --surface: #ffffff;
  --surface-soft: #f1f3f5;
  --border: rgba(0, 0, 0, 0.08);
  --text-muted: #6c757d;
  --primary: #0d6efd;
  --secondary: #212529;
  --shadow: 0 10px 20px rgba(33, 37, 41, 0.08);
}

body {
  background-color: var(--bg-page);
  color: var(--secondary);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

main {
  padding-top: 1rem;
}

.navbar-brand {
  font-weight: 700;
  letter-spacing: 0.05em;
}

.navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9);
}

.navbar-nav .nav-link.active,
.navbar-nav .nav-link:hover {
  color: #ffffff;
}

.page-header {
  margin-top: 0;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(33, 37, 41, 0.12);
}

.page-header h1 {
  font-size: 1.75rem;
}

.page-header .text-muted {
  color: var(--text-muted) !important;
}

.card {
  border: 1px solid rgba(33, 37, 41, 0.08);
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
  background-color: var(--surface);
}

.card-header {
  border-bottom: 1px solid rgba(33, 37, 41, 0.08);
  background-color: #f8f9fa;
}

.card-body {
  padding: 1.25rem;
}

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
}

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

.footer-links a {
  color: var(--secondary);
}

.footer-links a:hover {
  color: #0d6efd;
}

.form-control,
.form-select {
  border-radius: 0.5rem;
}

.form-control:focus,
.form-select:focus {
  box-shadow: 0 0 0 0.15rem rgba(13, 110, 253, 0.25);
}

.table {
  border-radius: 0.75rem;
  overflow: hidden;
}

.table thead th {
  background-color: #f8f9fa;
}

.dropdown-menu {
  min-width: 220px;
}

.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

img,
img[class*="img-"] {
  max-width: 100%;
  height: auto;
}

@media (max-width: 991.98px) {
  body.sb-sidenav-toggled {
    overflow: hidden;
    position: fixed;
    width: 100%;
  }
}

@media (max-width: 1199.98px) {
  .sb-topnav .navbar-text,
  .sb-topnav .navbar-text strong {
    font-size: 0.78rem !important;
  }

  .sb-topnav .navbar-text {
    padding: 0.35rem 0.75rem;
    line-height: 1.2;
    white-space: normal;
    word-break: break-word;
  }

  .sb-topnav .navbar-text i {
    margin-right: 0.35rem;
  }
}

@media (max-width: 767.98px) {
  .sb-topnav .navbar-text,
  .sb-topnav .navbar-text strong {
    font-size: 0.74rem !important;
  }
}

@media (max-width: 991.98px) {
  body.sb-sidenav-toggled {
    overflow: hidden !important;
    position: fixed;
    width: 100%;
  }
}