/* ============================================================
   LVRD · Library — the archive index
   Design contract from design_handoff_library v1.0.
   The site's existing .site-header chrome owns the top nav;
   this stylesheet only owns the library-specific surface below.
   ============================================================ */

/* ============================================================
   Page shell
   ============================================================ */
.library {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 48px 160px;
}

/* site.css ships a global `section { padding: 128px 0 }` rule meant
   for the marketing slabs on the home page. Neutralize it inside the
   library so the head/summary/spotlight/ledger rhythm matches the
   design contract. `:where()` keeps the override at zero specificity
   so the section-specific rules below win their own paddings. */
.library :where(section) { padding: 0; }

/* ---------- Page head ---------- */
.lib-head {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  column-gap: 64px;
  row-gap: 48px;
  align-items: end;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--border);
}
.lib-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-subtle);
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 28px;
}
.lib-eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.lib-title {
  font-size: 64px; line-height: 64px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--fg-strong);
  margin: 0;
  text-wrap: balance;
  max-width: 14ch;
}
.lib-title em { font-size: 1.04em; }

.lib-intro p {
  font-size: 18px; line-height: 28px;
  color: var(--fg-muted);
  margin: 0 0 18px;
  max-width: 56ch;
}
.lib-intro p.lib-intro-faint { color: var(--fg-faint); }

/* ---------- Summary strip ---------- */
.lib-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 56px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.lib-sum {
  padding: 24px 32px;
  border-right: 1px solid var(--border);
}
.lib-sum:first-child { padding-left: 0; }
.lib-sum:last-child { border-right: 0; padding-right: 0; }
.lib-sum .ls-label {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-faint); letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 10px;
}
.lib-sum .ls-value {
  display: flex; align-items: baseline; gap: 8px;
  color: var(--fg-strong);
}
.lib-sum .ls-num {
  font-size: 32px; font-weight: 600;
  letter-spacing: -0.015em;
  font-feature-settings: "tnum";
}
.lib-sum .ls-unit {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-subtle); letter-spacing: 0.08em; text-transform: uppercase;
}
.lib-sum .ls-sub {
  margin-top: 6px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-faint); letter-spacing: 0.04em;
}

/* ============================================================
   Spotlight (featured most-recent entry)
   ============================================================ */
.spotlight {
  margin-top: 64px;
  background: var(--smoke-900);
  color: var(--smoke-50);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.spotlight:empty { display: none; }
.spotlight-bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 28px;
  border-bottom: 1px solid var(--smoke-800);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--smoke-400);
}
.spotlight-bar .sb-tag {
  color: var(--marian-lift);
  display: inline-flex; align-items: center; gap: 10px;
}
.spotlight-bar .sb-tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--marian-lift);
  animation: lvrd-breath calc(var(--duration-breath) * 2.5) var(--easing-breath) infinite;
}
.spotlight-grid {
  display: grid;
  grid-template-columns: 200px 1fr 220px;
  gap: 48px;
  padding: 48px 28px;
  align-items: start;
}
.spotlight-meta {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.04em;
  color: var(--smoke-400);
  text-transform: uppercase;
  display: grid; gap: 6px;
}
.spotlight-meta .sm-id { color: var(--marian-lift); font-size: 13px; letter-spacing: 0.06em; }
.spotlight-meta .sm-row { display: flex; gap: 6px; align-items: baseline; }
.spotlight-meta .sm-row span:first-child { color: var(--smoke-500); width: 56px; }
.spotlight-meta .sm-row span:last-child { color: var(--smoke-300); }
.spotlight-title {
  font-size: 34px; line-height: 40px; font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--smoke-50);
  margin: 0 0 16px;
  text-wrap: balance;
}
.spotlight-title em {
  color: var(--marian-lift);
  font-size: 1.04em;
}
.spotlight-lede {
  font-size: 16px; line-height: 26px;
  color: var(--smoke-300);
  margin: 0 0 28px;
  max-width: 56ch;
}
.spotlight-cta {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--marian-lift);
  border: 0; padding: 0;
  text-decoration: none;
  transition: gap 200ms;
}
.spotlight-cta:hover { gap: 16px; border: 0; }
.spotlight-cta::after { content: "→"; }

.spotlight-stats { display: grid; gap: 18px; }
.spotlight-stat {
  border-top: 1px solid var(--smoke-700);
  padding-top: 12px;
}
.spotlight-stat:first-child { border-top: 0; padding-top: 0; }
.spotlight-stat .ss-lbl {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--smoke-500); margin-bottom: 4px;
}
.spotlight-stat .ss-val {
  font-size: 22px; font-weight: 600;
  color: var(--smoke-50); letter-spacing: -0.005em;
  font-feature-settings: "tnum";
}
.spotlight-stat .ss-val .ss-unit {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--smoke-400); letter-spacing: 0.04em;
  text-transform: uppercase; margin-left: 6px;
}

/* ============================================================
   Toolbar
   ============================================================ */
.lib-toolbar {
  margin-top: 64px;
  position: sticky;
  top: 64px;
  z-index: 40;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  display: flex;
  align-items: center;
  gap: 16px;
}

/* segmented type control */
.seg {
  display: inline-flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
}
.seg button {
  border: 0; background: transparent;
  font-family: var(--font-sans);
  font-size: 13px; font-weight: 500;
  color: var(--fg-muted);
  padding: 7px 14px;
  border-radius: 3px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 200ms, color 200ms;
}
.seg button:hover { color: var(--fg-strong); }
.seg button[data-active="true"] {
  background: var(--fg-strong);
  color: var(--bg);
}
.seg button .seg-count {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--fg-faint);
  font-feature-settings: "tnum";
}
.seg button[data-active="true"] .seg-count {
  color: color-mix(in oklab, var(--bg) 70%, transparent);
}

/* generic button-like control */
.lib-filter-slot { position: relative; }
.lib-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-sans);
  font-size: 13px; font-weight: 500;
  color: var(--fg-strong);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  transition: border-color 200ms, color 200ms;
  position: relative;
}
.lib-btn:hover { border-color: var(--border-strong); }
.lib-btn[data-open="true"] { border-color: var(--accent); color: var(--accent); }
.lib-btn .caret { font-family: var(--font-mono); font-size: 10px; color: var(--fg-faint); transform: translateY(-1px); }
.lib-btn .count-pip {
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--accent);
  color: var(--fg-on-accent);
  border-radius: 9999px;
  padding: 2px 6px;
  letter-spacing: 0.04em;
  font-feature-settings: "tnum";
}
.lib-btn .sort-label {
  color: var(--fg-faint);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* search input */
.lib-search {
  margin-left: auto;
  display: inline-flex; align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  height: 36px;
  width: 240px;
  transition: border-color 200ms, width 200ms;
}
.lib-search:focus-within {
  border-color: var(--accent);
  width: 280px;
}
.lib-search .sm-glyph {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-faint);
  letter-spacing: 0.04em;
}
.lib-search input {
  flex: 1;
  border: 0; outline: none; background: transparent;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--fg);
  min-width: 0;
}
.lib-search input::placeholder {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--fg-faint);
  font-size: 12px;
}
.lib-search .sm-clear {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg-faint); cursor: pointer; border: 0; background: transparent;
  letter-spacing: 0.04em; text-transform: uppercase;
}
.lib-search .sm-clear:hover { color: var(--accent); }

/* popovers */
.popover {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 50;
  min-width: 240px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  padding: 8px;
}
.pop-head {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-subtle);
  padding: 8px 10px 6px;
  display: flex; justify-content: space-between; align-items: center;
}
.pop-head .pop-clear {
  border: 0; background: transparent;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--accent); cursor: pointer;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.pop-list { display: grid; gap: 0; }
.pop-list button {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; text-align: left;
  border: 0; background: transparent;
  padding: 8px 10px;
  font-family: var(--font-sans);
  font-size: 13px; color: var(--fg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 200ms;
  gap: 12px;
}
.pop-list button:hover { background: var(--surface); }
.pop-list button[data-active="true"] { color: var(--accent); }
.pop-list button[data-active="true"]::after {
  content: "✓";
  font-family: var(--font-mono); font-size: 12px;
  color: var(--accent);
}
.pop-list .pl-count {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg-faint); letter-spacing: 0.04em;
}
.pop-list .pl-empty {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--fg-faint);
  padding: 8px 10px;
}

/* active filter chip row */
.lib-filters-active {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 16px 0 0;
  align-items: center;
}
.lib-filters-active .ml-label {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-faint);
  margin-right: 4px;
}
.fchip-active {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.04em;
  padding: 5px 6px 5px 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--fg-strong);
}
.fchip-active .ka {
  color: var(--fg-faint);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.fchip-active button {
  border: 0; background: transparent;
  color: var(--fg-faint); cursor: pointer;
  font-family: var(--font-mono); font-size: 12px;
  padding: 0 4px;
  line-height: 1;
}
.fchip-active button:hover { color: var(--accent); }
.lib-clear-all {
  border: 0; background: transparent;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent); cursor: pointer;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 4px 0;
}

/* ============================================================
   Ledger
   ============================================================ */
.ledger {
  margin-top: 40px;
  border-top: 1px solid var(--border);
}
.ledger-row {
  display: grid;
  grid-template-columns: 180px 1fr 240px;
  gap: 48px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 200ms;
  position: relative;
  text-decoration: none;
  border-top: 0;
  border-left: 0;
  border-right: 0;
}
.ledger-row:hover { background: color-mix(in oklab, var(--surface) 70%, transparent); }
.ledger-row::before {
  content: "";
  position: absolute;
  left: -16px; top: 32px; bottom: 32px;
  width: 1px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 200ms;
}
.ledger-row:hover::before { opacity: 1; }

.ledger-meta {
  display: flex; flex-direction: column; gap: 6px;
}
.ledger-meta .lm-tag-row {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 6px;
}
.ledger-meta .lm-id {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--accent); letter-spacing: 0.06em;
  font-weight: 500;
}
.ledger-meta .lm-type {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 3px 7px 3px 9px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
  position: relative;
}
.ledger-meta .lm-type[data-kind="field-note"]::before {
  content: ""; display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--fg-muted);
  margin-right: 6px;
  vertical-align: 1px;
}
.ledger-meta .lm-type[data-kind="case-study"] {
  border-color: var(--accent);
  color: var(--accent);
}
.ledger-meta .lm-type[data-kind="case-study"]::before {
  content: ""; display: inline-block;
  width: 6px; height: 6px;
  background: var(--accent);
  margin-right: 6px;
  vertical-align: 1px;
  transform: rotate(45deg) translateY(-1px);
  border-radius: 1px;
}
.ledger-meta .lm-date {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-subtle); letter-spacing: 0.04em;
  text-transform: uppercase;
}
.ledger-meta .lm-week {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-faint); letter-spacing: 0.04em;
  text-transform: uppercase;
}
.ledger-meta .lm-author {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-muted); letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 8px;
}

.ledger-body {
  display: flex; flex-direction: column; gap: 12px;
  min-width: 0;
}
.ledger-title {
  font-size: 22px; line-height: 28px; font-weight: 600;
  letter-spacing: -0.01em; color: var(--fg-strong);
  margin: 0;
  text-wrap: balance;
  text-decoration: none;
  border: 0;
}
.ledger-title em { font-size: 1.04em; }
.ledger-row:hover .ledger-title { color: var(--accent); }
.ledger-lede {
  font-size: 14px; line-height: 22px;
  color: var(--fg-muted);
  margin: 0;
  max-width: 60ch;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.ledger-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 4px;
}
.ledger-tag {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
}

.ledger-stats {
  display: flex; flex-direction: column; gap: 10px;
  text-align: right;
  border-left: 1px solid var(--border);
  padding-left: 32px;
}
.ledger-stat {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px;
}
.ledger-stat .lst-lbl {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg-faint); letter-spacing: 0.12em; text-transform: uppercase;
}
.ledger-stat .lst-val {
  font-family: var(--font-sans);
  font-size: 14px; font-weight: 600;
  color: var(--fg-strong);
  font-feature-settings: "tnum";
  display: inline-flex; align-items: baseline; gap: 4px;
}
.ledger-stat .lst-val.featured {
  color: var(--accent);
  font-size: 20px;
}
.ledger-stat .lst-val .lst-unit {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--fg-faint); letter-spacing: 0.04em; text-transform: uppercase;
  font-weight: 500;
}
.ledger-stat .lst-val.status-mark {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent);
}
.ledger-stat .lst-val.status-mark::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
}
.ledger-stat[data-state="install"] .lst-val.status-mark { color: var(--fg-muted); }
.ledger-stat[data-state="install"] .lst-val.status-mark::before { background: var(--fg-muted); }
.ledger-stat[data-state="build"] .lst-val.status-mark { color: var(--fg-muted); }
.ledger-stat[data-state="build"] .lst-val.status-mark::before {
  background: transparent;
  border: 1px solid var(--fg-muted);
  width: 8px; height: 8px;
  box-sizing: border-box;
}

/* empty state */
.ledger-empty {
  padding: 96px 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.ledger-empty h3 {
  font-size: 20px; font-weight: 600; color: var(--fg-strong);
  margin: 0 0 8px;
}
.ledger-empty p {
  font-size: 14px; color: var(--fg-muted);
  margin: 0 0 24px;
}
.ledger-empty button {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  background: transparent;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 200ms, color 200ms;
}
.ledger-empty button:hover { background: var(--accent); color: var(--fg-on-accent); }

/* footer — result count */
.ledger-foot {
  padding: 24px 0;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--fg-faint); letter-spacing: 0.08em; text-transform: uppercase;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
  .lib-head { grid-template-columns: 1fr; gap: 32px; }
  .lib-title { font-size: 56px; line-height: 58px; max-width: 100%; }
  .lib-summary { grid-template-columns: repeat(2, 1fr); }
  .lib-sum { padding: 20px 24px 20px 0; }
  .lib-sum:nth-child(2) { border-right: 0; padding-right: 0; }
  .lib-sum:nth-child(3), .lib-sum:nth-child(4) { border-top: 1px solid var(--border); }
  .spotlight-grid { grid-template-columns: 160px 1fr; }
  .spotlight-stats {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, 1fr);
    display: grid; gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--smoke-700);
  }
  .spotlight-stat { border-top: 0; padding-top: 0; }
  .ledger-row { grid-template-columns: 160px 1fr; gap: 32px; }
  .ledger-stats {
    grid-column: 1 / -1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
    border-left: 0;
    border-top: 1px dashed var(--border);
    padding-left: 0;
    padding-top: 16px;
    text-align: left;
  }
  .ledger-stat { flex-direction: column; align-items: flex-start; gap: 4px; }
  .ledger-stat .lst-val.featured { font-size: 20px; }
}

@media (max-width: 900px) {
  .library { padding: 48px 24px 96px; }
  .lib-title { font-size: 40px; line-height: 44px; }
  .lib-summary { grid-template-columns: 1fr 1fr; }
  .lib-toolbar {
    flex-wrap: wrap;
    top: 56px;
  }
  .lib-search { width: 100%; margin-left: 0; order: 5; }
  .spotlight-grid { grid-template-columns: 1fr; padding: 32px 24px; gap: 24px; }
  .spotlight-meta { grid-template-columns: repeat(2, 1fr); display: grid; }
  .spotlight-stats { grid-template-columns: repeat(2, 1fr); }
  .spotlight-title { font-size: 28px; line-height: 34px; }
  .ledger-row {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px 0;
  }
  .ledger-stats { padding-top: 12px; }
  .lib-toolbar > .seg { flex-grow: 0; }
}

@media (max-width: 640px) {
  .library { padding: 32px 20px 80px; }
  .lib-title { font-size: 32px; line-height: 36px; }
  .lib-summary { grid-template-columns: 1fr; }
  .lib-sum { border-right: 0; border-top: 1px solid var(--border); padding: 16px 0; }
  .lib-sum:first-child { border-top: 0; }
  .ledger-title { font-size: 19px; line-height: 24px; }
  .seg { flex-wrap: wrap; }
  .seg button { padding: 6px 10px; font-size: 12px; }
  .seg button .seg-count { display: none; }
}

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .spotlight-bar .sb-tag::before { animation: none; opacity: 1; }
  .lib-search { transition: none; }
}