/* CSIT knowledge index — keyword-led discovery across the website. */

.tags-page {
  --tags-bg: #eef2f0;
  --tags-hero: #c7d2ce;
  --tags-line: rgba(31, 58, 61, 0.22);
  --tags-muted: rgba(31, 58, 61, 0.7);
  background: var(--tags-bg);
  color: var(--deep-green);
}

.tags-page main {
  display: block;
  max-width: none;
  padding: 0;
}

.tags-page .site-header {
  background: var(--deep-green);
  border-bottom-color: var(--accent);
}

.tags-hero {
  position: relative;
  isolation: isolate;
  min-height: clamp(470px, 61svh, 680px);
  margin: 0;
  padding: clamp(76px, 9vw, 145px) max(5vw, 52px) clamp(64px, 8vw, 126px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
  align-items: center;
  gap: clamp(64px, 9vw, 180px);
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: var(--tags-hero);
  box-shadow: none;
}

.tags-hero::after {
  content: "[INDEX]";
  position: absolute;
  z-index: -1;
  right: -0.045em;
  bottom: -0.19em;
  color: rgba(31, 58, 61, 0.055);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(8rem, 21vw, 25rem);
  font-weight: 600;
  letter-spacing: -0.09em;
  line-height: 0.8;
  pointer-events: none;
}

.tags-hero-copy {
  max-width: 900px;
}

.tags-eyebrow,
.tags-section-kicker,
.tags-group-index,
.tags-card-meta,
.tags-results-count {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.tags-eyebrow {
  margin: 0 0 24px;
  color: var(--deep-green);
}

.tags-hero h1 {
  max-width: 920px;
  margin: 0;
  color: var(--deep-green);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(4.25rem, 8.1vw, 9.4rem);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.86;
  overflow-wrap: anywhere;
}

.tags-summary {
  max-width: 610px;
  margin: 0 0 clamp(32px, 4vw, 54px);
  color: var(--tags-muted);
  font-size: clamp(1rem, 1.18vw, 1.25rem);
  line-height: 1.65;
}

.tags-search {
  display: grid;
  gap: 12px;
}

.tags-search label {
  color: var(--deep-green);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.tags-search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  border-bottom: 1px solid var(--deep-green);
}

.tags-search input {
  min-width: 0;
  padding: 18px 0;
  border: 0;
  border-radius: 0;
  outline: 0;
  background: transparent;
  color: var(--deep-green);
  font: inherit;
  font-size: clamp(1.05rem, 1.2vw, 1.25rem);
}

.tags-search input::placeholder {
  color: rgba(31, 58, 61, 0.54);
}

.tags-search button {
  min-width: 58px;
  padding: 0 0 0 20px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--deep-green);
  font-size: 1.4rem;
  cursor: pointer;
}

.tags-search button:hover,
.tags-search button:focus-visible {
  color: #2b7562;
}

.tags-actions {
  margin-top: 25px;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.tags-actions a {
  color: var(--deep-green);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
}

.tags-actions a:hover,
.tags-actions a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 6px;
}

.tags-results-shell {
  padding: clamp(76px, 8vw, 132px) max(5vw, 52px) clamp(94px, 10vw, 170px);
  background: var(--tags-bg);
}

.tags-results-head {
  padding-bottom: clamp(38px, 4vw, 62px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 40px;
  border-bottom: 1px solid var(--tags-line);
}

.tags-section-kicker {
  margin: 0 0 16px;
  color: #397765;
}

.tags-results-head h2 {
  margin: 0;
  color: var(--deep-green);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(2.8rem, 5vw, 6rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.tags-results-count {
  margin: 0 0 8px;
  color: var(--tags-muted);
  text-align: right;
}

.tags-results {
  display: grid;
  gap: 0;
}

.tags-group {
  display: grid;
  gap: 0;
  grid-template-columns: minmax(190px, 0.27fr) minmax(0, 0.73fr);
  border-bottom: 1px solid var(--tags-line);
}

.tags-group[hidden] {
  display: none;
}

.tags-group-heading {
  padding: clamp(38px, 4vw, 64px) clamp(30px, 4vw, 70px) clamp(38px, 4vw, 64px) 0;
  border-right: 1px solid var(--tags-line);
}

.tags-group-index {
  display: block;
  margin-bottom: 20px;
  color: #397765;
}

.tags-group h3 {
  margin: 0;
  color: var(--deep-green);
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(1.65rem, 2.4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.tags-group-total {
  margin: 12px 0 0;
  color: var(--tags-muted);
  font-size: 0.9rem;
}

.tags-grid {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tags-card {
  position: relative;
  min-height: 190px;
  padding: clamp(32px, 3.2vw, 52px);
  display: flex;
  flex-direction: column;
  gap: 15px;
  border: 0;
  border-right: 1px solid var(--tags-line);
  border-bottom: 1px solid var(--tags-line);
  border-radius: 0;
  background: transparent;
  color: var(--deep-green);
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease;
}

.tags-card:nth-child(2n) {
  border-right: 0;
}

.tags-card:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.tags-card:hover,
.tags-card:focus-visible {
  z-index: 1;
  outline: 0;
  background: var(--deep-green);
  color: var(--off-white);
  box-shadow: none;
  transform: none;
}

.tags-card-meta {
  color: #397765;
}

.tags-card:hover .tags-card-meta,
.tags-card:focus-visible .tags-card-meta {
  color: var(--accent);
}

.tags-card-title {
  max-width: 680px;
  padding-right: 38px;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(1.25rem, 1.65vw, 1.8rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.tags-card-description {
  max-width: 650px;
  color: var(--tags-muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

.tags-card:hover .tags-card-description,
.tags-card:focus-visible .tags-card-description {
  color: rgba(245, 247, 247, 0.72);
}

.tags-card-arrow {
  position: absolute;
  top: clamp(32px, 3.2vw, 52px);
  right: clamp(32px, 3.2vw, 52px);
  font-size: 1.1rem;
}

.tags-empty-state {
  padding: clamp(70px, 8vw, 120px) 0;
  border-bottom: 1px solid var(--tags-line);
}

.tags-empty-state[hidden] {
  display: none;
}

.tags-empty-state h3 {
  max-width: 760px;
  margin: 0 0 18px;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(2rem, 4vw, 4.2rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 1;
}

.tags-empty-state p {
  max-width: 620px;
  margin: 0;
  color: var(--tags-muted);
  line-height: 1.65;
}

.tags-directory {
  padding-top: clamp(68px, 7vw, 112px);
}

.tags-directory-head {
  margin-bottom: 30px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 30px;
}

.tags-directory h2 {
  margin: 0;
  font-family: "Space Grotesk", system-ui, sans-serif;
  font-size: clamp(2rem, 3.2vw, 3.7rem);
  font-weight: 500;
  letter-spacing: -0.05em;
}

.tags-directory-list {
  display: flex;
  flex-wrap: wrap;
  border-top: 1px solid var(--tags-line);
  border-left: 1px solid var(--tags-line);
}

.tags-directory-list a {
  padding: 13px 17px;
  border-right: 1px solid var(--tags-line);
  border-bottom: 1px solid var(--tags-line);
  color: var(--deep-green);
  font-size: 0.85rem;
  text-decoration: none;
}

.tags-directory-list a:hover,
.tags-directory-list a:focus-visible {
  background: var(--deep-green);
  color: var(--off-white);
}

.tags-directory-list a[hidden] {
  display: none;
}

.tags-directory-toggle {
  margin-top: 28px;
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid var(--deep-green);
  border-radius: 0;
  background: transparent;
  color: var(--deep-green);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
}

.tags-directory-toggle:hover,
.tags-directory-toggle:focus-visible {
  color: #397765;
  border-bottom-color: #397765;
}

@media (max-width: 980px) {
  .tags-hero {
    grid-template-columns: 1fr;
    align-content: center;
    gap: 54px;
  }

  .tags-hero-copy,
  .tags-hero-tools {
    max-width: 760px;
  }

  .tags-group {
    grid-template-columns: 1fr;
  }

  .tags-group-heading {
    padding-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--tags-line);
  }
}

@media (max-width: 680px) {
  .tags-hero {
    min-height: 0;
    padding: 74px 7vw 78px;
  }

  .tags-hero h1 {
    max-width: 100%;
    font-size: clamp(3rem, 14vw, 5.5rem);
    overflow-wrap: anywhere;
  }

  .tags-results-shell {
    padding-right: 7vw;
    padding-left: 7vw;
  }

  .tags-results-head {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .tags-results-count {
    text-align: left;
  }

  .tags-grid {
    grid-template-columns: 1fr;
  }

  .tags-card,
  .tags-card:nth-child(2n),
  .tags-card:nth-last-child(-n + 2) {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--tags-line);
  }

  .tags-card:last-child {
    border-bottom: 0;
  }

  .tags-directory-head {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tags-card {
    transition: none;
  }
}