:root {
  --ui-ink: #233044;
  --ui-muted: #627184;
  --ui-bg: #eef3f7;
  --ui-panel: #ffffff;
  --ui-line: #d4dde7;
  --ui-blue: #2f5f9f;
  --ui-blue-dark: #243142;
  --ui-green: #7dbb36;
  --ui-green-soft: #eef7e8;
}

body {
  background:
    linear-gradient(180deg, #eef5f8 0, #f6f8fa 340px),
    var(--ui-bg);
  color: var(--ui-ink);
}

.page-shell,
.app-shell {
  background: rgba(255, 255, 255, .78);
  border: 1px solid rgba(212, 221, 231, .9);
  border-radius: 10px;
  box-shadow: 0 12px 34px rgba(35, 48, 68, .11);
}

.page-shell {
  margin-top: 18px;
  margin-bottom: 18px;
}

.app-navbar,
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  margin: -6px -6px 22px;
  padding: 12px 14px;
  border: 1px solid rgba(212, 221, 231, .95);
  border-radius: 8px;
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 6px 18px rgba(35, 48, 68, .08);
  backdrop-filter: blur(10px);
}

.brand-title,
.app-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ui-blue-dark);
}

.brand-title::before,
.app-title::before {
  content: "";
  width: 12px;
  height: 28px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--ui-green), #a7d86a);
  box-shadow: 0 0 0 4px var(--ui-green-soft);
}

.main-menu .btn,
.app-nav .nav-link-button {
  border-color: transparent;
  background: transparent;
  color: var(--ui-blue-dark);
  font-weight: 700;
  box-shadow: none;
}

.main-menu .btn:hover,
.app-nav .nav-link-button:hover {
  border-color: var(--ui-line);
  background: #fff;
  color: var(--ui-blue);
}

.main-menu .btn-primary,
.app-nav .nav-link-button.active,
.component-tab.active {
  border-color: var(--ui-blue);
  background: var(--ui-blue);
  color: #fff;
}

.main-menu .btn-primary:hover,
.app-nav .nav-link-button.active:hover,
.component-tab.active:hover {
  border-color: var(--ui-blue-dark);
  background: var(--ui-blue-dark);
  color: #fff;
}

.panel {
  border-color: var(--ui-line);
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(35, 48, 68, .07);
}

.panel > .h5:first-child,
.panel h2.h5 {
  color: var(--ui-blue-dark);
  font-weight: 750;
}

.form-control,
.form-select {
  border-color: #c8d3df;
  color: var(--ui-ink);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--ui-green);
  box-shadow: 0 0 0 .18rem rgba(125, 187, 54, .2);
}

.input-group-text {
  border-color: #c8d3df;
  background: #f7fafc;
}

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

.btn-primary:hover {
  border-color: var(--ui-blue-dark);
  background: var(--ui-blue-dark);
}

.btn-outline-secondary {
  border-color: #c5d0dc;
  color: #43546a;
}

.btn-outline-secondary:hover {
  border-color: var(--ui-blue);
  background: #eef5ff;
  color: var(--ui-blue);
}

.table {
  --bs-table-color: var(--ui-ink);
  --bs-table-hover-bg: #f3f8fc;
}

.table thead th {
  border-bottom-color: var(--ui-line);
  color: #536276;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.component-tab {
  border-color: #c5d0dc;
  background: #fff;
  color: #43546a;
}

.result-box {
  border-color: var(--ui-line);
  background: #fbfdff;
}

pre {
  border-color: #1e2a3b;
}

@media (max-width: 760px) {
  .page-shell,
  .app-shell {
    margin-top: 0;
    border-radius: 0;
  }

  .app-navbar,
  .app-header {
    position: static;
    margin: 0 0 18px;
  }
}