:root {
  --fno-rail-width: clamp(182px, 16vw, 208px);
  --fno-rail-gap: 0.8rem;
}

body.fno-drawer-open {
  overflow: hidden;
}

.fno-case {
  position: relative;
  display: grid;
  grid-template-columns: var(--fno-rail-width) minmax(0, 1fr);
  gap: var(--fno-rail-gap);
  align-items: start;
}

.fno-container {
  width: min(96%, 1240px);
}

.fno-content {
  margin-left: 0;
  display: grid;
  gap: 1rem;
}

.fno-contents-toggle {
  display: none;
}

.fno-drawer-backdrop {
  display: none;
}

.fno-anchor {
  position: sticky;
  top: 86px;
  left: auto;
  width: var(--fno-rail-width);
  max-height: calc(100vh - 104px);
  z-index: 70;
  padding: 14px;
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--border) 88%, var(--accent) 12%);
  background: color-mix(in srgb, var(--surface) 96%, var(--surface-alt));
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.fno-anchor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}

.fno-anchor-title {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  font-weight: 700;
}

.fno-anchor-close {
  display: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  padding: 0.24rem 0.48rem;
  font-size: 0.78rem;
  font-weight: 700;
}

.fno-anchor-links {
  position: relative;
  display: grid;
  gap: 7px;
  padding-left: 12px;
  overflow-y: auto;
  max-height: calc(100vh - 170px);
}

.fno-progress-track {
  position: absolute;
  left: 1px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: color-mix(in srgb, var(--border) 90%, transparent);
}

.fno-progress-indicator {
  position: absolute;
  left: -1px;
  top: 0;
  width: 3px;
  height: 20px;
  border-radius: 999px;
  background: var(--accent);
  transition: top 0.22s ease;
}

.fno-group-label {
  margin: 0.38rem 0 0.05rem;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
}

.fno-group-label:first-of-type {
  margin-top: 0;
}

.fno-nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 42px;
  padding: 8px 12px;
  border-radius: 11px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.2;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.fno-nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  bottom: 7px;
  width: 3px;
  border-radius: 2px;
  background: transparent;
}

.fno-nav-link:hover {
  background: color-mix(in srgb, var(--surface-alt) 84%, var(--accent) 6%);
  color: var(--text);
}

.fno-nav-link.active {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-alt));
  color: var(--text);
  font-weight: 700;
}

.fno-nav-link.active::before {
  background: var(--accent);
}

.fno-nav-link.active:hover {
  background: color-mix(in srgb, var(--accent) 14%, var(--surface-alt));
  color: var(--text);
}

.fno-nav-icon {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--border) 88%, var(--accent) 12%);
  background: var(--surface);
  position: relative;
}

.fno-nav-icon::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 2px;
  background: color-mix(in srgb, var(--accent) 42%, transparent);
}

.fno-nav-link.active .fno-nav-icon {
  border-color: color-mix(in srgb, var(--accent) 65%, var(--border));
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
}

.fno-section {
  scroll-margin-top: 96px;
}

.fno-kicker {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.fno-title {
  margin: 0.3rem 0 0;
  font-size: clamp(1.8rem, 5vw, 2.85rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.fno-lead {
  margin: 0.65rem 0 0;
  max-width: 76ch;
  color: var(--muted);
}

.fno-chip-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.fno-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--muted);
  padding: 0.34rem 0.74rem;
  font-size: var(--text-xs);
  font-weight: 700;
}

.fno-cta-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.fno-result-badges {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.fno-result-badge {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
  font-size: 0.84rem;
  color: var(--muted);
  background: var(--surface-alt);
}

.fno-result-badge strong {
  color: var(--text);
}

.fno-result-badge.best {
  border-color: color-mix(in srgb, var(--success) 55%, var(--border));
  background: color-mix(in srgb, var(--success) 12%, var(--surface-alt));
}

.fno-facts-grid {
  margin-top: 0.95rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.fno-fact {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-alt);
  padding: 0.72rem;
}

.fno-fact-label {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 700;
}

.fno-fact-value {
  margin: 0.42rem 0 0;
  font-size: var(--text-sm);
  color: var(--text);
  font-weight: 600;
}

.fno-data-grid {
  margin-top: 0.85rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 0.6rem;
}

.fno-data-card,
.fno-legend-card,
.fno-model-card,
.fno-figure-card,
.fno-qual-row,
.fno-table-card,
.fno-chart-card,
.fno-lesson-card,
.fno-future-card,
.fno-team-card,
.fno-failure-figure {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-alt);
  padding: 0.9rem;
}

.fno-data-card h3,
.fno-model-card h3,
.fno-qual-row h3,
.fno-chart-card h3,
.fno-lesson-card h3,
.fno-future-card h3,
.fno-team-card h3 {
  margin: 0;
  font-size: 1.03rem;
}

.fno-data-card ul,
.fno-list,
.fno-lesson-card ul,
.fno-team-card ul {
  margin: 0.55rem 0 0;
  padding-left: 1.05rem;
}

.fno-data-card li,
.fno-list li,
.fno-lesson-card li,
.fno-team-card li {
  color: var(--muted);
}

.fno-legend-card img,
.fno-figure-card img,
.fno-failure-figure img,
.fno-qual-grid img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0a0a0a;
}

.fno-legend-card figcaption,
.fno-figure-card figcaption,
.fno-failure-figure figcaption,
.fno-qual-grid figcaption {
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: var(--text-xs);
}

.fno-model-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.fno-model-card p,
.fno-future-card p,
.fno-team-card p {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.fno-arch-grid,
.fno-lessons-grid,
.fno-future-grid,
.fno-team-grid,
.fno-quant-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.fno-details {
  margin-top: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-alt);
  padding: 0.75rem 0.9rem;
}

.fno-details summary {
  cursor: pointer;
  font-weight: 700;
}

.fno-details-grid {
  margin-top: 0.6rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.fno-details-grid p {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
}

.fno-qual-row {
  margin-top: 0.7rem;
}

.fno-qual-row:first-of-type {
  margin-top: 0.95rem;
}

.fno-qual-grid {
  margin-top: 0.65rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.fno-takeaway {
  margin: 0.6rem 0 0;
  color: var(--muted);
}

.fno-takeaway strong {
  color: var(--text);
}

.fno-table {
  width: 100%;
  border-collapse: collapse;
}

.fno-table th,
.fno-table td {
  text-align: left;
  padding: 0.58rem 0.45rem;
  border-bottom: 1px solid var(--border);
}

.fno-table th {
  color: var(--muted);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.fno-table td {
  font-size: var(--text-sm);
}

.fno-table .is-best td {
  font-weight: 700;
}

.fno-mobile-table {
  display: none;
  margin-top: 0.55rem;
  gap: 0.5rem;
}

.fno-mobile-table article {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem;
  background: var(--surface);
}

.fno-mobile-table p {
  margin: 0.2rem 0;
  color: var(--muted);
}

.fno-bars {
  margin-top: 0.55rem;
  display: grid;
  gap: 0.7rem;
}

.fno-bar-label {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: var(--text-sm);
}

.fno-bar-track {
  margin-top: 0.25rem;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--border) 80%, transparent);
  overflow: hidden;
}

.fno-bar-fill {
  width: calc(var(--score) * 1%);
  height: 100%;
  border-radius: 999px;
}

.fno-bar-fill.best {
  background: linear-gradient(90deg, #0f766e, #14b8a6);
}

.fno-bar-fill.mid {
  background: linear-gradient(90deg, #1d4ed8, #60a5fa);
}

.fno-bar-fill.low {
  background: linear-gradient(90deg, #c2410c, #f59e0b);
}

.fno-callout {
  margin-top: 0.75rem;
  border: 1px solid color-mix(in srgb, #f59e0b 60%, var(--border));
  border-radius: 12px;
  padding: 0.8rem 0.95rem;
  background: color-mix(in srgb, #f59e0b 10%, var(--surface-alt));
}

.fno-callout h3 {
  margin: 0;
  font-size: 1rem;
}

.fno-callout p {
  margin: 0.42rem 0 0;
  color: var(--muted);
}

@media (max-width: 1120px) {
  .fno-anchor {
    width: var(--fno-rail-width);
  }
}

@media (max-width: 1024px) {
  .fno-case {
    grid-template-columns: 1fr;
  }

  .fno-content {
    margin-left: 0;
  }

  .fno-contents-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    position: sticky;
    top: 82px;
    z-index: 90;
    width: fit-content;
    margin-bottom: 0.45rem;
    padding: 0.52rem 0.82rem;
  }

  .fno-drawer-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    border: 0;
    background: rgba(10, 18, 32, 0.38);
    opacity: 0;
    pointer-events: none;
    z-index: 110;
    transition: opacity 0.2s ease;
  }

  .fno-drawer-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  .fno-anchor {
    position: fixed;
    left: 0;
    top: 0;
    width: min(88vw, 300px);
    height: 100dvh;
    max-height: none;
    border-radius: 0 16px 16px 0;
    transform: translateX(-105%);
    transition: transform 0.24s ease;
    z-index: 120;
  }

  .fno-anchor.open {
    transform: translateX(0);
  }

  .fno-anchor-close {
    display: inline-flex;
  }

  .fno-anchor-links {
    max-height: calc(100dvh - 82px);
  }

  .fno-result-badges,
  .fno-facts-grid,
  .fno-data-grid,
  .fno-model-grid,
  .fno-arch-grid,
  .fno-details-grid,
  .fno-quant-grid,
  .fno-lessons-grid,
  .fno-future-grid,
  .fno-team-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .fno-contents-toggle {
    top: 74px;
  }

  .fno-table {
    display: none;
  }

  .fno-mobile-table {
    display: grid;
  }

  .fno-qual-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .fno-content {
    gap: 0.85rem;
  }

  .fno-contents-toggle {
    width: 100%;
    justify-content: center;
  }

  .fno-anchor {
    width: min(92vw, 300px);
  }

  .fno-cta-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .fno-cta-row .btn {
    width: 100%;
  }

  .fno-details,
  .fno-mobile-table article {
    padding: 0.7rem 0.8rem;
  }

  .fno-bar-label {
    flex-direction: column;
    align-items: flex-start;
  }
}