:root {
  --nerd-accent: #5980a6;
  --nerd-paper: #1d2d3d;
  --nerd-ink: #edf4fb;
  --nerd-dim: #8fa2b5;
  --nerd-line: rgba(148, 188, 227, 0.25);
  --nerd-edge: rgba(148, 188, 227, 0.38);
  --nerd-hover: rgba(148, 188, 227, 0.10);
  --nerd-page: #152330;
}

html[data-bs-theme="light"] {
  --nerd-paper: #faf9f5;
  --nerd-ink: #1d2d3d;
  --nerd-dim: #65717c;
  --nerd-line: rgba(29, 45, 61, 0.14);
  --nerd-edge: rgba(29, 45, 61, 0.28);
  --nerd-hover: rgba(89, 128, 166, 0.09);
  --nerd-page: #efeee9;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--nerd-page);
  color: var(--nerd-ink);
  font-family: "Barlow", sans-serif;
}

.nerd-shell {
  margin-block: clamp(1rem, 4vw, 3.5rem);
}

.nerd-app {
  overflow: hidden;
  background: var(--nerd-paper);
  color: var(--nerd-ink);
  border: 1px solid var(--nerd-edge);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.14);
}

.nerd-header {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--nerd-edge);
}

.nerd-title {
  font: 600 clamp(2rem, 5vw, 2.6rem)/1 "Barlow Condensed", sans-serif;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.nerd-meta,
.nerd-footer,
.nerd-nav-button,
.nerd-search,
.nerd-button,
.topic-index,
.topic-tags,
.topic-count {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.nerd-meta {
  color: var(--nerd-dim);
  font-size: .72rem;
}

.nerd-actions {
  width: min(100%, 27rem);
}

.nerd-search,
.nerd-button {
  min-height: 2.5rem;
  border-color: var(--nerd-edge);
  border-radius: 0;
  background: transparent;
  color: var(--nerd-ink);
  box-shadow: none !important;
}

/* Dropdown options Fix */
.nerd-search option {
  background-color: #1e2535;
  color: #c9d1d9;
}

.nerd-search::placeholder { color: var(--nerd-dim); opacity: .9; }
.nerd-search:focus { background: transparent; color: var(--nerd-ink); border-color: var(--nerd-accent); }

.nerd-button {
  padding-inline: 1rem;
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.nerd-button:hover,
.nerd-button:focus-visible { background: var(--nerd-hover); color: var(--nerd-ink); border-color: var(--nerd-accent); }

.nerd-nav {
  padding-inline: clamp(.5rem, 2vw, 2rem);
  border-bottom: 1px solid var(--nerd-line);
}

.nerd-nav-button {
  display: inline-flex;
  align-items: baseline;
  gap: .35rem;
  padding: .75rem 1rem;
  border: 0;
  border-right: 1px solid var(--nerd-line);
  border-radius: 0;
  background: transparent;
  color: var(--nerd-accent);
  font-size: .69rem;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.nerd-nav-button:hover,
.nerd-nav-button:focus-visible { background: var(--nerd-hover); color: var(--nerd-ink); outline: 0; }
.nerd-nav-button.active { background: var(--nerd-accent); color: var(--nerd-paper); }
.nerd-nav-count { opacity: .6; font-size: .63rem; }

.topic-column {
  border-right: 1px solid var(--nerd-line);
  border-bottom: 1px solid var(--nerd-line);
}

.topic-card { height: 100%; padding: 1.5rem 1.5rem 2rem; }

.topic-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem;
  padding-bottom: .45rem;
  margin-bottom: .25rem;
  border-bottom: 1px solid var(--nerd-accent);
}

.topic-title {
  margin: 0;
  font-size: .91rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.topic-count { color: var(--nerd-dim); font-size: .65rem; }

.topic-link {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  margin-right: -.35rem;
  padding: .4rem .35rem .4rem 0;
  color: inherit;
  text-decoration: none;
}

.topic-link:hover,
.topic-link:focus-visible,
.topic-link.keyboard-active { background: var(--nerd-hover); color: inherit; outline: 0; }

.topic-index {
  flex: none;
  color: var(--nerd-dim);
  font-size: .66rem;
  line-height: 1.55;
}

.topic-name { font-size: .86rem; font-weight: 500; line-height: 1.35; }
.topic-tags { color: var(--nerd-dim); font-size: .72rem; line-height: 1.35; }
.topic-description { display: block; color: var(--nerd-dim); font-size: .77rem; line-height: 1.4; text-wrap: pretty; }

.nerd-empty {
  padding: 2.75rem 2rem;
  border-bottom: 1px solid var(--nerd-line);
  color: var(--nerd-dim);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: .8rem;
}

.nerd-footer {
  padding: .9rem clamp(1rem, 3vw, 2rem) 1.1rem;
  color: var(--nerd-dim);
  font-size: .66rem;
  line-height: 1.4;
  letter-spacing: .06em;
  text-transform: uppercase;
}

@media (min-width: 1200px) {
  .topic-column:nth-child(3n) { border-right: 0; }
}

@media (min-width: 768px) and (max-width: 1199.98px) {
  .topic-column:nth-child(2n) { border-right: 0; }
}

@media (max-width: 767.98px) {
  .nerd-shell { margin-block: 0; }
  .nerd-app { border-inline: 0; box-shadow: none; }
  .topic-column { border-right: 0; }
  .nerd-nav { flex-wrap: nowrap !important; overflow-x: auto; scrollbar-width: thin; padding-inline: 0; }
  .nerd-nav-button { flex: 0 0 auto; }
}

@media (max-width: 575.98px) {
  .nerd-header { padding: 1.15rem; }
  .nerd-actions { width: 100%; }
  .topic-card { padding: 1.25rem 1.15rem 1.6rem; }
  .nerd-footer { padding-inline: 1.15rem; }
}

.min-w-0 { min-width: 0; }