/*
  New4Tek shared design system
  Use this for admin centers, web workspaces, and utility tools. Product pages
  may add local CSS, but shared color, spacing, and control patterns belong here.
*/

:root {
  color-scheme: light;
  --n4k-page: #f6f8fc;
  --n4k-page-soft: #eef4fb;
  --n4k-surface: #ffffff;
  --n4k-surface-alt: #f8fbff;
  --n4k-rail: #102033;
  --n4k-rail-soft: #172a42;
  --n4k-border: #d8e3f1;
  --n4k-border-strong: #b7c8dd;
  --n4k-text: #15243a;
  --n4k-text-muted: #5f7088;
  --n4k-text-soft: #7b8da5;
  --n4k-primary: #12bde4;
  --n4k-primary-dark: #078cb2;
  --n4k-primary-soft: #e7f9fd;
  --n4k-blue: #4568f0;
  --n4k-green: #16a972;
  --n4k-green-soft: #e8fbf3;
  --n4k-yellow: #c98400;
  --n4k-yellow-soft: #fff6d8;
  --n4k-red: #d94b5c;
  --n4k-red-soft: #fff0f2;
  --n4k-radius: 10px;
  --n4k-radius-lg: 16px;
  --n4k-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --n4k-shadow-md: 0 14px 40px rgba(15, 23, 42, 0.10);
  --n4k-font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="dark"] {
  color-scheme: dark;
  --n4k-page: #07111f;
  --n4k-page-soft: #0d1a2b;
  --n4k-surface: #111f33;
  --n4k-surface-alt: #172842;
  --n4k-border: #29415f;
  --n4k-border-strong: #3d5a7b;
  --n4k-text: #f5f8ff;
  --n4k-text-muted: #a7b7ce;
  --n4k-text-soft: #8192aa;
  --n4k-primary-soft: rgba(34, 199, 238, 0.14);
  --n4k-green-soft: rgba(22, 169, 114, 0.14);
  --n4k-yellow-soft: rgba(201, 132, 0, 0.16);
  --n4k-red-soft: rgba(217, 75, 92, 0.16);
}

.n4k-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  background: var(--n4k-page);
  color: var(--n4k-text);
  font-family: var(--n4k-font);
}

.n4k-sidebar {
  min-height: 100vh;
  padding: 20px;
  background: var(--n4k-rail);
  color: #ffffff;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.n4k-main {
  min-width: 0;
  padding: 22px;
}

.n4k-topbar,
.n4k-panel,
.n4k-card {
  background: var(--n4k-surface);
  border: 1px solid var(--n4k-border);
  box-shadow: var(--n4k-shadow-sm);
}

.n4k-topbar {
  min-height: 64px;
  border-radius: var(--n4k-radius-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.n4k-panel,
.n4k-card {
  border-radius: var(--n4k-radius-lg);
  padding: 18px;
}

.n4k-card {
  box-shadow: none;
}

.n4k-section-title {
  margin: 0;
  color: var(--n4k-text);
  font-size: 1.35rem;
  line-height: 1.2;
}

.n4k-muted {
  color: var(--n4k-text-muted);
}

.n4k-btn {
  min-height: 40px;
  min-width: 116px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--n4k-primary);
  color: #ffffff;
  font: 800 0.92rem/1 var(--n4k-font);
  cursor: pointer;
  text-decoration: none;
}

.n4k-btn:hover {
  background: var(--n4k-primary-dark);
}

.n4k-btn-secondary {
  background: var(--n4k-surface-alt);
  border-color: var(--n4k-border);
  color: var(--n4k-text);
}

.n4k-btn-secondary:hover {
  background: var(--n4k-page-soft);
}

.n4k-btn-danger {
  background: var(--n4k-red);
  color: #ffffff;
}

.n4k-input,
.n4k-select,
.n4k-textarea {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--n4k-border);
  border-radius: 8px;
  background: var(--n4k-surface);
  color: var(--n4k-text);
  padding: 0 12px;
  font: 0.94rem/1.3 var(--n4k-font);
}

.n4k-textarea {
  min-height: 92px;
  padding-top: 10px;
  resize: vertical;
}

.n4k-input:focus,
.n4k-select:focus,
.n4k-textarea:focus {
  border-color: var(--n4k-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(18, 189, 228, 0.16);
}

.n4k-table-wrap {
  overflow: auto;
  border: 1px solid var(--n4k-border);
  border-radius: var(--n4k-radius);
  background: var(--n4k-surface);
}

.n4k-table {
  width: 100%;
  border-collapse: collapse;
}

.n4k-table th,
.n4k-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--n4k-border);
  text-align: left;
  vertical-align: top;
}

.n4k-table th {
  color: var(--n4k-text-muted);
  background: var(--n4k-surface-alt);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.n4k-table td {
  color: var(--n4k-text);
  font-size: 0.92rem;
}

.n4k-badge {
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--n4k-primary-soft);
  color: var(--n4k-primary-dark);
  border: 1px solid rgba(18, 189, 228, 0.25);
  font-size: 0.78rem;
  font-weight: 800;
}

.n4k-badge-success {
  background: var(--n4k-green-soft);
  color: var(--n4k-green);
  border-color: rgba(22, 169, 114, 0.25);
}

.n4k-badge-warning {
  background: var(--n4k-yellow-soft);
  color: var(--n4k-yellow);
  border-color: rgba(201, 132, 0, 0.25);
}

.n4k-badge-danger {
  background: var(--n4k-red-soft);
  color: var(--n4k-red);
  border-color: rgba(217, 75, 92, 0.25);
}

.n4k-stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.n4k-stat {
  padding: 16px;
  border: 1px solid var(--n4k-border);
  border-radius: var(--n4k-radius);
  background: var(--n4k-surface);
}

.n4k-stat strong {
  display: block;
  color: var(--n4k-text);
  font-size: 1.9rem;
  line-height: 1;
}

.n4k-stat span {
  display: block;
  margin-top: 6px;
  color: var(--n4k-text-muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.n4k-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.n4k-toolbar-spread {
  justify-content: space-between;
}

.n4k-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(560px, 100vw);
  height: 100vh;
  padding: 22px;
  background: var(--n4k-surface);
  border-left: 1px solid var(--n4k-border);
  box-shadow: -24px 0 70px rgba(15, 23, 42, 0.18);
  overflow: auto;
  z-index: 1000;
}

.n4k-modal {
  width: min(620px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  overflow: auto;
  border: 1px solid var(--n4k-border);
  border-radius: var(--n4k-radius-lg);
  background: var(--n4k-surface);
  box-shadow: var(--n4k-shadow-md);
}

@media (max-width: 980px) {
  .n4k-shell {
    grid-template-columns: 1fr;
  }

  .n4k-sidebar {
    min-height: auto;
    position: static;
  }

  .n4k-stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .n4k-main {
    padding: 14px;
  }

  .n4k-stat-grid {
    grid-template-columns: 1fr;
  }

  .n4k-btn {
    width: 100%;
  }
}

/* --- Site redesign: ambient aurora for training pages --- */
@media (prefers-reduced-motion: no-preference) {
  body::before{content:"";position:fixed;inset:-10%;z-index:0;pointer-events:none;background:
    radial-gradient(640px 420px at 15% 18%, rgba(34,199,238,.11), transparent 62%),
    radial-gradient(760px 520px at 85% 68%, rgba(81,103,246,.12), transparent 62%),
    radial-gradient(520px 420px at 55% 108%, rgba(34,199,238,.07), transparent 62%);
    animation:n4tAurora 20s ease-in-out infinite alternate}
  @keyframes n4tAurora{
    0%{transform:translate3d(0,0,0) scale(1)}
    100%{transform:translate3d(-50px,36px,0) scale(1.09)}}
  body > *{position:relative;z-index:1}
}