/* web-send.org — W3C Origin Isolation & Tor Browser Privacy RFC Archive
   Fonts: Alegreya (Display) / Inter Tight (Body) / Share Tech Mono (Mono)
   Palette: #F5F7FA / #E8EDF3 x #0F172A x #047857 + #B45309
   Table CSS Defense: zero display/nowrap directly on td/th */

:root {
  --editorial-width: 76rem;
  --content-width: 49rem;
  --rail-width: 18.5rem;
  --grid-gap: 3rem;
  --container-pad: 1.5rem;

  --bg-canvas: #F5F7FA;
  --bg-surface: #E8EDF3;
  --bg-sheet: #FFFFFF;
  --bg-ink-panel: #0F172A;

  --ink: #0F172A;
  --ink-muted: #334155;
  --ink-subtle: #475569;
  --rule: #CBD5E1;
  --rule-strong: #0F172A;

  --signal: #047857;
  --signal-soft: #ECFDF5;
  --signal-border: #A7F3D0;

  --amber: #B45309;
  --amber-soft: #FFFBEB;
  --amber-border: #FDE68A;

  --crimson: #B91C1C;
  --crimson-soft: #FEF2F2;
  --crimson-border: #FECACA;

  --font-display: 'Alegreya', Georgia, serif;
  --font-body: 'Inter Tight', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

@media (min-width: 768px) {
  :root {
    --container-pad: 2.25rem;
  }
}

@media (min-width: 1280px) {
  :root {
    --container-pad: 3rem;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--bg-canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.03125rem;
  line-height: 1.68;
  overflow-x: hidden;
}

@keyframes ws-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes ws-pulse-status {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--bg-sheet);
  padding: 0.6rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

a {
  color: var(--signal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

/* Global container & vertical axis alignment */
.ws-container {
  width: 100%;
  max-width: var(--editorial-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* Top RFC Masthead & Navigation */
.ws-header {
  background: var(--bg-sheet);
  border-bottom: 2px solid var(--rule-strong);
}

.ws-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--rule);
}

.ws-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.ws-brand-mark {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--bg-sheet);
  background: var(--ink);
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
}

.ws-brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.ws-status-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.ws-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  animation: ws-pulse-status 2.8s ease-in-out infinite;
}

.ws-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  padding-block: 0.65rem;
  align-items: center;
}

.ws-nav-link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
  padding-block: 0.25rem;
  border-bottom: 2px solid transparent;
}

.ws-nav-link:hover,
.ws-nav-link.is-active {
  color: var(--ink);
  border-bottom-color: var(--signal);
}

.ws-nav-link.is-active {
  font-weight: 600;
}

/* Dual-Column RFC Metadata Masthead */
.ws-rfc-masthead {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--rule);
  padding-block: 2rem 2.25rem;
}

.ws-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-subtle);
  margin: 0 0 0.75rem;
}

.ws-breadcrumb a {
  color: var(--ink-muted);
  text-decoration: none;
}

.ws-breadcrumb a:hover {
  text-decoration: underline;
}

.ws-rfc-header-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.95fr);
  gap: 2rem 2.75rem;
  align-items: start;
}

@media (max-width: 960px) {
  .ws-rfc-header-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }
}

.ws-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 3.6vw, 2.95rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0 0 0.85rem;
  text-wrap: balance;
}

.ws-dek {
  font-size: 1.08rem;
  line-height: 1.55;
  color: var(--ink-muted);
  max-width: 44rem;
  margin: 0;
}

.ws-rfc-meta-panel {
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--ink);
  padding: 1rem 1.2rem;
}

.ws-rfc-meta-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 0.65rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--rule);
}

.ws-meta-list {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(7.5rem, auto) minmax(0, 1fr);
  gap: 0.45rem 0.9rem;
  font-size: 0.84rem;
  line-height: 1.42;
}

.ws-meta-list dt {
  font-family: var(--font-mono);
  color: var(--ink-subtle);
  font-size: 0.78rem;
}

.ws-meta-list dd {
  margin: 0;
  color: var(--ink);
  font-weight: 500;
}

.ws-meta-list dd code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--signal);
}

/* Main Editorial Spec Grid (49rem Prose + 18.5rem Rail) */
.ws-spec-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--rail-width);
  gap: var(--grid-gap);
  padding-block: 2.25rem 3.5rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .ws-spec-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.25rem;
  }
}

.ws-prose {
  min-width: 0;
  max-width: var(--content-width);
}

.ws-prose-wide {
  min-width: 0;
  max-width: 100%;
}

.ws-prose h2,
.ws-prose-wide h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.22;
  color: var(--ink);
  margin: 2.4rem 0 0.85rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--rule);
}

.ws-prose h2:first-child,
.ws-prose-wide h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.ws-prose h3,
.ws-prose-wide h3 {
  font-family: var(--font-display);
  font-size: 1.24rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin: 1.65rem 0 0.55rem;
}

.ws-prose p,
.ws-prose-wide p {
  margin: 0 0 1rem;
  color: var(--ink-muted);
}

.ws-prose ul,
.ws-prose ol,
.ws-prose-wide ul,
.ws-prose-wide ol {
  margin: 0 0 1.15rem;
  padding-left: 1.35rem;
  color: var(--ink-muted);
}

.ws-prose li,
.ws-prose-wide li {
  margin-bottom: 0.45rem;
}

code,
pre {
  font-family: var(--font-mono);
}

p code,
li code,
td code {
  background: var(--bg-surface);
  color: var(--ink);
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
  font-size: 0.88em;
}

.ws-code-block {
  background: var(--bg-ink-panel);
  color: #E2E8F0;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--signal);
  overflow-x: auto;
  font-size: 0.84rem;
  line-height: 1.52;
  margin: 1.1rem 0 1.4rem;
}

/* GEO Link-Free Answer Capsule */
.ws-answer-capsule {
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--signal);
  padding: 1.1rem 1.35rem;
  margin: 0 0 1.75rem;
}

.ws-capsule-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 0.45rem;
}

.answer-box {
  font-size: 1rem;
  line-height: 1.65;
  font-weight: 500;
  color: var(--ink);
  margin: 0;
}

.ws-capsule-cite {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-subtle);
  margin: 0.65rem 0 0;
}

/* Interactive Cross-Origin State Isolation Sandbox (Zero <select>, Button Matrix) */
.ws-sandbox {
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--signal);
  padding: 1.35rem 1.4rem;
  margin: 1.75rem 0 2.25rem;
  animation: ws-fade-in 0.25s ease-out;
}

.ws-sandbox-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 1.1rem;
}

.ws-sandbox-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0;
  color: var(--ink);
}

.ws-sandbox-kicker {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--amber);
}

.ws-control-group {
  margin-bottom: 1rem;
}

.ws-control-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-subtle);
  margin-bottom: 0.45rem;
}

.ws-btn-matrix {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.ws-toggle-btn {
  appearance: none;
  background: var(--bg-canvas);
  color: var(--ink-muted);
  border: 1px solid var(--rule);
  padding: 0.48rem 0.78rem;
  min-height: 44px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 2px;
  transition: background-color 0.14s ease, border-color 0.14s ease, color 0.14s ease;
}

.ws-toggle-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.ws-toggle-btn.is-active {
  background: var(--ink);
  color: var(--bg-sheet);
  border-color: var(--ink);
}

.ws-sandbox-readout {
  margin-top: 1.15rem;
  background: var(--bg-canvas);
  border: 1px solid var(--rule);
  padding: 1rem 1.15rem;
}

.ws-verdict-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.ws-verdict-badge:not(td):not(th) {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  padding: 0.22rem 0.6rem;
  border-radius: 2px;
  white-space: nowrap;
}

.ws-verdict-badge.is-isolated {
  background: var(--signal-soft);
  color: var(--signal);
  border: 1px solid var(--signal-border);
}

.ws-verdict-badge.is-mitigated {
  background: var(--amber-soft);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}

.ws-verdict-badge.is-leak {
  background: var(--crimson-soft);
  color: var(--crimson);
  border: 1px solid var(--crimson-border);
}

.ws-readout-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem 1rem;
  margin-bottom: 0.8rem;
}

@media (max-width: 640px) {
  .ws-readout-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.ws-readout-cell {
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  padding: 0.65rem 0.8rem;
}

.ws-readout-cell-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-subtle);
  margin-bottom: 0.2rem;
}

.ws-readout-cell-v {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--ink);
  word-break: break-word;
}

.ws-readout-summary {
  margin: 0 0 0.65rem;
  font-size: 0.94rem;
  color: var(--ink);
}

.ws-readout-code {
  margin: 0;
  background: var(--bg-ink-panel);
  color: #E2E8F0;
  padding: 0.75rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.48;
  overflow-x: auto;
}

/* Booktabs Three-Line Tables & Strict Defense */
.table-responsive-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.25rem 0 1.75rem;
}

.ws-three-line-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 2px solid var(--rule-strong);
  border-bottom: 2px solid var(--rule-strong);
  font-size: 0.89rem;
  line-height: 1.46;
  font-variant-numeric: tabular-nums;
  background: var(--bg-sheet);
}

.ws-three-line-table caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-subtle);
  padding: 0 0 0.45rem;
}

.ws-three-line-table thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: var(--bg-surface);
  border-bottom: 1.5px solid var(--rule-strong);
  padding: 0.65rem 0.8rem;
  vertical-align: bottom;
}

.ws-three-line-table tbody td {
  padding: 0.7rem 0.8rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
  color: var(--ink-muted);
}

.ws-three-line-table tbody tr:last-child td {
  border-bottom: none;
}

.ws-badge-pass:not(td):not(th),
.ws-badge-warn:not(td):not(th),
.ws-badge-fail:not(td):not(th) {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 0.14rem 0.45rem;
  border-radius: 2px;
  white-space: nowrap;
}

.ws-badge-pass:not(td):not(th) {
  background: var(--signal-soft);
  color: var(--signal);
  border: 1px solid var(--signal-border);
}

.ws-badge-warn:not(td):not(th) {
  background: var(--amber-soft);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}

.ws-badge-fail:not(td):not(th) {
  background: var(--crimson-soft);
  color: var(--crimson);
  border: 1px solid var(--crimson-border);
}

/* Editorial Plate Figures & Responsive SVG Diagrams */
.ws-plate {
  margin: 1.5rem 0 1.85rem;
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  padding: 0.75rem;
}

.ws-plate img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
}

.ws-plate figcaption {
  margin-top: 0.6rem;
  font-size: 0.84rem;
  color: var(--ink-subtle);
  line-height: 1.48;
}

.ws-plate figcaption strong {
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--ink);
}

.ws-diagram-wrap {
  margin: 1.5rem 0 1.85rem;
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  padding: 0.75rem;
}

.ws-diagram {
  display: block;
  width: 100%;
  height: auto;
}

.ws-diag-bg { fill: var(--bg-canvas); }
.ws-diag-box { fill: var(--bg-sheet); stroke: var(--rule-strong); stroke-width: 1.4; }
.ws-diag-box-soft { fill: var(--bg-surface); stroke: var(--rule); stroke-width: 1.2; }
.ws-diag-box-safe { fill: var(--signal-soft); stroke: var(--signal); stroke-width: 1.5; }
.ws-diag-box-warn { fill: var(--amber-soft); stroke: var(--amber); stroke-width: 1.5; }
.ws-diag-box-fail { fill: var(--crimson-soft); stroke: var(--crimson); stroke-width: 1.5; }
.ws-diag-title { font-family: var(--font-display); font-size: 15px; font-weight: 700; fill: var(--ink); }
.ws-diag-text { font-family: var(--font-body); font-size: 12px; fill: var(--ink-muted); }
.ws-diag-mono { font-family: var(--font-mono); font-size: 11px; fill: var(--ink); }
.ws-diag-mono-safe { font-family: var(--font-mono); font-size: 11px; fill: var(--signal); }
.ws-diag-mono-warn { font-family: var(--font-mono); font-size: 11px; fill: var(--amber); }
.ws-diag-line { stroke: var(--ink); stroke-width: 1.5; fill: none; }
.ws-diag-line-dashed { stroke: var(--amber); stroke-width: 1.5; stroke-dasharray: 5 4; fill: none; }
.ws-diag-line-safe { stroke: var(--signal); stroke-width: 1.8; fill: none; }

/* Sticky Right Sidebar Rail */
.ws-rail {
  position: sticky;
  top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (max-width: 1024px) {
  .ws-rail {
    position: static;
  }
}

.ws-rail-card {
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  padding: 1rem 1.1rem;
}

.ws-rail-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 0.7rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--rule);
}

.ws-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.88rem;
}

.ws-toc-list a {
  color: var(--ink-muted);
  text-decoration: none;
}

.ws-toc-list a:hover {
  color: var(--signal);
  text-decoration: underline;
}

.ws-rail-cta {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--signal);
  color: var(--bg-sheet);
  text-decoration: none;
  padding: 0.5rem 0.85rem;
  border-radius: 2px;
}

.ws-rail-cta:hover {
  background: var(--ink);
  color: var(--bg-sheet);
}

/* Historical Archive Ledger & Silent Disclosure */
.ws-archive-ledger {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--rule-strong);
}

.ws-archive-card {
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--amber);
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
}

.ws-archive-card h3 {
  margin-top: 0.35rem;
}

.ref-disclosure {
  background: var(--bg-surface);
  border: 1px solid var(--rule);
  padding: 0.85rem 1.1rem;
  margin: 1rem 0 1.25rem;
}

.ref-disclosure summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--ink);
}

.ref-disclosure[open] summary {
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--rule);
}

/* FAQ Block */
.ws-faq-item {
  border-bottom: 1px solid var(--rule);
  padding-block: 0.9rem;
}

.ws-faq-q {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.45rem;
}

.faq-a {
  font-size: 0.96rem;
  color: var(--ink-muted);
  margin: 0;
}

.faq-src {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-subtle);
  margin: 0.4rem 0 0;
}

/* 404 Rescue Terminal */
.ws-not-found {
  max-width: 44rem;
  margin: 3.5rem auto;
  background: var(--bg-sheet);
  border: 1px solid var(--rule);
  border-top: 4px solid var(--amber);
  padding: 2rem;
}

/* Clean Three-Column Institutional Footer (Zero Telemetry Noise) */
.ws-footer {
  background: var(--bg-sheet);
  border-top: 2px solid var(--rule-strong);
  padding-block: 2.25rem 2.5rem;
  color: var(--ink-muted);
  font-size: 0.88rem;
}

.ws-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.75rem 2.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .ws-footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }
}

.ws-footer-heading {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.55rem;
}

.ws-footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.ws-footer-links a {
  color: var(--ink-muted);
  text-decoration: none;
}

.ws-footer-links a:hover {
  color: var(--signal);
  text-decoration: underline;
}

.ws-footer-bottom {
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.82rem;
  color: var(--ink-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
}

@media (prefers-reduced-motion: reduce) {
  .ws-sandbox,
  .ws-status-dot,
  .ws-toggle-btn {
    animation: none;
    transition: none;
  }
}

@media print {
  .ws-nav,
  .ws-rail,
  .ws-footer {
    display: none;
  }
  body {
    background: #FFFFFF;
    color: #000000;
  }
}