/* ── Network Security · deep teal & amber theme ─────────────────────────── */

:root {
  --nsec-teal: #14707a;
  --nsec-teal-dark: #0c4d54;
  --nsec-teal-bright: #1b93a1;
  --nsec-amber: #d99a3d;
  --nsec-amber-deep: #b8781f;
  --nsec-ink: #12262a;
  --nsec-border: rgba(18, 38, 42, 0.14);

  /* Drive Material's primary (header/nav/footer) and accent (links/hover) */
  --md-primary-fg-color: #14707a;
  --md-primary-fg-color--light: #1b93a1;
  --md-primary-fg-color--dark: #0c4d54;
  --md-accent-fg-color: #b8781f;
}

[data-md-color-scheme="slate"] {
  --nsec-border: rgba(255, 255, 255, 0.16);
  --md-primary-fg-color: #14707a;
  --md-primary-fg-color--light: #1b93a1;
  --md-primary-fg-color--dark: #0c4d54;
  --md-accent-fg-color: #e0ac57; /* brighter amber reads better on dark */
  --md-typeset-a-color: #e0ac57;
}

.md-header,
.md-tabs {
  box-shadow: none;
}

/* amber hairline under the header/tabs for the two-tone look */
.md-tabs {
  border-bottom: 3px solid var(--nsec-amber);
}

.md-header__title {
  font-weight: 700;
}

.md-typeset h1,
.md-typeset h2 {
  font-weight: 750;
  letter-spacing: 0;
}

.md-typeset h1 {
  margin-bottom: 0.9rem;
  color: var(--nsec-teal);
}

[data-md-color-scheme="slate"] .md-typeset h1 {
  color: var(--nsec-amber);
}

.md-typeset h2 {
  border-bottom: 2px solid var(--nsec-amber);
  padding-bottom: 0.35rem;
}

.md-typeset table:not([class]) {
  border: 1px solid var(--nsec-border);
  border-radius: 0.4rem;
  overflow: hidden;
}

.md-typeset table:not([class]) th {
  background: var(--nsec-teal);
  color: #fff;
  font-weight: 700;
}

.md-typeset code {
  border-radius: 0.25rem;
}

.md-typeset .admonition,
.md-typeset details {
  border-radius: 0.45rem;
}

/* colored left rule on blockquotes for a little warmth */
.md-typeset blockquote {
  border-left: 0.2rem solid var(--nsec-amber);
}

/* ── Home hero cards ──────────────────────────────────────────────────── */
.nsec-hero-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  margin: 1.5rem 0 2rem;
}

.md-typeset .nsec-card {
  align-items: center;
  border: 1px solid var(--nsec-border);
  border-left: 0.35rem solid var(--nsec-teal);
  border-radius: 0.5rem;
  color: var(--md-default-fg-color);
  display: flex;
  font-size: 1.05rem;
  font-weight: 700;
  gap: 0.55rem;
  min-height: 5rem;
  padding: 1rem;
  text-decoration: none;
  transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.md-typeset .nsec-card:hover {
  border-color: var(--nsec-amber);
  box-shadow: 0 0.55rem 1.4rem rgba(12, 77, 84, 0.18);
  transform: translateY(-2px);
}

.md-typeset .nsec-card-notes {
  border-left-color: var(--nsec-teal);
}

.md-typeset .nsec-card-exercises {
  border-left-color: var(--nsec-amber-deep);
}

.md-typeset .nsec-card-quiz {
  border-left-color: var(--nsec-teal-bright);
}

.md-typeset .nsec-card-projects {
  border-left-color: var(--nsec-amber);
}

.md-typeset .nsec-card-resources {
  border-left-color: var(--nsec-teal-dark);
}

.md-nav__item .md-nav__link--active {
  font-weight: 700;
}

.md-footer {
  margin-top: 2rem;
}

@media screen and (max-width: 44.9375em) {
  .nsec-hero-grid {
    grid-template-columns: 1fr;
  }

  .md-typeset .nsec-card {
    min-height: 4.25rem;
  }
}
/* Learning resource hub navigation: right rail */
.resource-sidebar-hub {
  border-top: 1px solid var(--md-default-fg-color--lightest);
  display: flex;
  flex-direction: column;
  gap: 0.42rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
}

.resource-sidebar-hub__title {
  color: var(--md-default-fg-color--light);
  font-size: 0.64rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin-bottom: 0.1rem;
  text-transform: uppercase;
}

.resource-sidebar-hub__button {
  align-items: center;
  border: 1px solid var(--course-hub-color, var(--md-primary-fg-color));
  border-radius: 0.45rem;
  color: var(--course-hub-color, var(--md-primary-fg-color));
  display: flex;
  font-size: 0.68rem;
  font-weight: 800;
  justify-content: space-between;
  line-height: 1.25;
  padding: 0.42rem 0.5rem;
  text-decoration: none;
  transition: background-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.resource-sidebar-hub__button::after {
  content: "\2192";
  flex-shrink: 0;
  font-weight: 900;
  margin-left: 0.45rem;
}

.resource-sidebar-hub__button:hover {
  background-color: color-mix(in srgb, var(--course-hub-color, var(--md-primary-fg-color)) 10%, transparent);
  box-shadow: 0 0.25rem 0.65rem color-mix(in srgb, var(--course-hub-color, var(--md-primary-fg-color)) 15%, transparent);
  text-decoration: none;
  transform: translateY(-1px);
}

.resource-sidebar-hub__home { --course-hub-color: var(--md-primary-fg-color); }
.resource-sidebar-hub__dsai { --course-hub-color: #34526b; }
.resource-sidebar-hub__cyber { --course-hub-color: #b4122e; }