/* ==========================================================================
   NFID Foundation — Component, Page & Accessibility Extensions (Design D1)
   ========================================================================== */

/* Page layout shell */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main#content {
  flex: 1 0 auto;
}

/* Rule 2: Owner placeholders rendered with yellow background in non-production */
.nfid-placeholder {
  background-color: #fef08a;
  color: var(--ink);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
  border: 1px solid #facc15;
}

/* Details-based Mobile Drawer (no JS required, visible only on phone <= 860px) */
.nfid-mobile-drawer {
  display: none;
  position: relative;
}
.nfid-mobile-drawer > summary {
  list-style: none;
  cursor: pointer;
  padding: 8px 12px;
  border: 1px solid #CBD2DA;
  border-radius: var(--btn-radius);
  color: var(--ink);
  font-weight: 600;
  font-size: 14px;
  line-height: 20px;
}
.nfid-mobile-drawer > summary::-webkit-details-marker {
  display: none;
}
.nfid-mobile-drawer-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: min(280px, 88vw);
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  box-shadow: 0 12px 32px -20px rgba(26, 35, 50, 0.25);
  padding: 16px 20px;
  z-index: 1050;
}
.nfid-mobile-drawer-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.nfid-mobile-drawer-panel li {
  border-bottom: 1px solid var(--rule);
}
.nfid-mobile-drawer-panel li:last-child {
  border-bottom: 0;
}
.nfid-mobile-drawer-panel a {
  display: block;
  padding: 10px 0;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
}
.nfid-mobile-drawer-panel li:first-child a {
  color: var(--teal);
  font-weight: 600;
}
.nfid-mobile-drawer-panel a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* Form textarea & validation states */
.form-card textarea {
  width: 100%;
  min-height: 96px;
  border: 1px solid #CBD2DA;
  border-radius: 6px;
  padding: 10px 12px;
  font: inherit;
  color: var(--ink);
  background: #fff;
  resize: vertical;
}
.nfid-field-error {
  color: #b91c1c;
  font-size: 14px;
  line-height: 20px;
  font-weight: 500;
  margin-top: 6px;
}
input[aria-invalid="true"],
select[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: #b91c1c !important;
}
.nfid-alert {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  line-height: 20px;
  margin: 16px 0;
  border: 1px solid #fecaca;
  background: #fef2f2;
  color: #991b1b;
}

/* Honeypot field: positioned off-screen via CSS (does not depend on JS) */
.nfid-hp-field {
  position: absolute !important;
  left: -9999px !important;
  top: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* Progressive enhancement helper: hidden when JS is disabled */
.js-only {
  display: none !important;
}
html.js-enabled .js-only {
  display: flex !important;
}

/* Section 5.4: Paper page citation and 2023 section constraint */
.paper-cite-wrap {
  max-width: 1000px;
  margin: 0 auto;
}
.paper-2023-block {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
}

/* Section 7: /articles index */
.series-section-title {
  font-size: 24px;
  line-height: 32px;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin-bottom: 16px;
}
.series-published-list {
  border-top: 1px solid var(--rule);
  margin-bottom: 64px;
}
.series-published-row {
  padding: 32px 0;
  border-bottom: 1px solid var(--rule);
}
.series-published-row .row-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.series-published-row h3 {
  font-size: 24px;
  line-height: 32px;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--ink);
  margin: 8px 0 10px;
}
.series-published-row h3 a {
  color: var(--ink);
  text-decoration: none;
}
.series-published-row h3 a:hover {
  color: var(--teal);
  text-decoration: underline;
}
.series-published-row .row-dek {
  font-size: 18px;
  line-height: 28px;
  color: var(--ink-2);
  max-width: 520px;
  margin: 0 0 14px;
}
.series-published-row .row-meta {
  font-size: 14px;
  line-height: 20px;
  color: var(--muted);
  margin: 0;
}
.series-published-row .row-meta b {
  color: var(--ink);
  font-weight: 600;
}
.series-published-row .row-outlet {
  font-size: 14px;
  line-height: 20px;
  font-weight: 600;
  color: var(--teal);
  margin-top: 6px;
}

.series-coming-list {
  border-top: 1px solid var(--rule);
}
.series-coming-row {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 24px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  color: var(--body);
  font-size: 16px;
  line-height: 26px;
}
.series-coming-row .part-num {
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}
.series-coming-row .part-main {
  color: var(--body);
}
.series-coming-row .part-main b {
  color: var(--ink-2);
  font-weight: 600;
}
.series-coming-row .part-status {
  font-size: 14px;
  line-height: 20px;
  color: var(--muted);
  white-space: nowrap;
}

/* Section 8.1: /specifications (plain rows separated by 1px rules, no cards, no chips on rows) */
.spec-group {
  margin-bottom: 64px;
}
.spec-group:last-child {
  margin-bottom: 0;
}
.spec-group-head {
  margin-bottom: 20px;
}
.spec-group-head h2 {
  font-size: 28px;
  line-height: 36px;
  font-weight: 700;
  letter-spacing: -0.015em;
}
.spec-group-head .t-small {
  margin-top: 6px;
  margin-bottom: 0;
}
.spec-rows {
  border-top: 1px solid var(--rule);
}
.spec-row {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 48px;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.spec-row h3 {
  margin: 0;
}
.spec-row h3 a {
  color: var(--teal);
  font-weight: 600;
  text-decoration: none;
}
.spec-row h3 a:hover {
  text-decoration: underline;
}
.spec-row p {
  margin: 0;
  max-width: 520px;
}
.status-pill {
  display: inline-block;
  font-size: 13px;
  line-height: 18px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.status-pill-ratified {
  color: var(--teal);
  background: var(--teal-tint);
}
.status-pill-other {
  color: var(--ink-2);
  background: var(--band);
}
.spec-detail-section {
  padding: 56px 0;
  border-top: 1px solid var(--rule);
}
.spec-detail-grid {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 48px;
  align-items: start;
}

/* Section 8.2: /standards */
.standards-list {
  border-top: 1px solid var(--rule);
}
.standards-row {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 48px;
  padding: 32px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.standards-row .std-rel {
  margin-top: 6px;
}
.standards-row .std-desc {
  margin: 0;
  max-width: 520px;
}

/* Section 8.3: /about */
.about-sec {
  padding: 64px 0;
  border-top: 1px solid var(--rule);
}
.def-list-4-8 {
  margin: 32px 0 0;
  border-top: 1px solid var(--rule);
}
.def-list-4-8 > div {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 48px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.def-list-4-8 dt {
  color: var(--ink);
  font-weight: 600;
  font-size: 18px;
  line-height: 26px;
}
.def-list-4-8 dd {
  margin: 0;
  max-width: 520px;
}

/* Section 8.4: /glossary */
.glossary-list {
  max-width: 760px;
  margin: 0;
  border-top: 1px solid var(--rule);
}
.glossary-row {
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}
.glossary-row dt {
  color: var(--ink);
  font-weight: 600;
  font-size: 18px;
  line-height: 26px;
  margin-bottom: 6px;
}
.glossary-row dd {
  margin: 0;
  font-size: 16px;
  line-height: 26px;
  color: var(--body);
  max-width: 540px;
}

/* Updates, Join, Contact, Security, Privacy, Terms */
.update-entry {
  max-width: 760px;
  padding: 32px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.update-entry h2 {
  margin: 8px 0 16px;
}
.update-entry a + a {
  margin-left: 20px;
}
.split-page {
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: 64px;
  align-items: start;
}
.prose-col {
  max-width: 560px;
}
.prose-col h2 {
  font-size: 24px;
  line-height: 32px;
  letter-spacing: -0.012em;
  margin: 40px 0 12px;
}
.prose-col h2:first-child {
  margin-top: 0;
}
.prose-col ul {
  margin: 0 0 16px;
  padding-left: 20px;
}
.prose-col li {
  margin-bottom: 8px;
}

@media (max-width: 860px) {
  .nfid-mobile-drawer {
    display: block;
  }
  .series-coming-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .spec-row,
  .spec-detail-grid,
  .standards-row,
  .def-list-4-8 > div,
  .split-page {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}