:root {
  --ga-ink: #1a2b3c;
  --ga-accent: #0d7377;
  --ga-accent-soft: #14919b;
  --ga-sand: #f3efe6;
  --ga-line: #d7cfc0;
}

body {
  font-family: "Source Sans Pro", "Segoe UI", sans-serif;
}

.app-login {
  background:
    radial-gradient(ellipse at 20% 20%, rgba(13, 115, 119, 0.25), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(26, 43, 60, 0.35), transparent 45%),
    linear-gradient(160deg, #1a2b3c 0%, #0d7377 55%, #14919b 100%);
}

.app-login .login-box {
  width: 400px;
}

.app-login .card {
  border: 0;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.app-login .login-logo,
.app-login .login-logo a {
  color: #fff !important;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

.main-sidebar {
  background: linear-gradient(180deg, #1a2b3c 0%, #16323f 100%) !important;
}

.brand-link {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
}

.content-wrapper {
  background:
    linear-gradient(180deg, rgba(243, 239, 230, 0.9), rgba(243, 239, 230, 0.65)),
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 11px,
      rgba(215, 207, 192, 0.35) 11px,
      rgba(215, 207, 192, 0.35) 12px
    );
  min-height: 100vh;
}

.card {
  border: 1px solid var(--ga-line);
  box-shadow: none;
}

.card-primary.card-outline {
  border-top: 3px solid var(--ga-accent);
}

.btn-primary,
.badge-primary,
.nav-pills .nav-link.active {
  background-color: var(--ga-accent) !important;
  border-color: var(--ga-accent) !important;
}

.btn-primary:hover {
  background-color: var(--ga-accent-soft) !important;
  border-color: var(--ga-accent-soft) !important;
}

.table thead th {
  border-top: 0;
  background: #eae4d8;
  color: var(--ga-ink);
}

.stat-tile {
  border-left: 4px solid var(--ga-accent);
  background: #fff;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}

.stat-tile .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ga-ink);
  line-height: 1.1;
}

.stat-tile .stat-label {
  color: #667788;
  font-size: 0.9rem;
}

.grade-input {
  width: 72px;
  text-align: center;
}

.ref-box {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: 0.04em;
  background: #f8f6f1;
  border: 1px dashed var(--ga-line);
  padding: 0.35rem 0.6rem;
  display: inline-block;
}

.readonly-banner {
  background: #fff8e6;
  border: 1px solid #f0d78c;
  color: #6a5400;
  padding: 0.6rem 0.9rem;
  margin-bottom: 1rem;
}

.card-section {
  margin-bottom: 1.25rem;
}

.card-section > .card {
  margin-bottom: 0;
}

.dataTables_wrapper {
  padding: 0.75rem 1rem 1rem;
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
  border: 1px solid var(--ga-line);
  border-radius: 0.25rem;
  padding: 0.25rem 0.5rem;
}

table.datatable thead th {
  white-space: nowrap;
}

table.datatable td.dt-index {
  width: 3rem;
  color: #778899;
}

.card-body.card-body-form {
  max-width: 720px;
}