.problem-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: start;
  min-height: clamp(560px, 74vh, 760px);
}

.hero-copy {
  padding-top: clamp(4px, 2vw, 22px);
}

.hero-title {
  max-width: 860px;
  margin-top: 16px;
  font-size: clamp(2.8rem, 6.2vw, 5.15rem);
  line-height: 0.96;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero-title span {
  display: block;
}

.hero-title .muted {
  color: var(--muted);
}

.hero-body {
  max-width: 680px;
  margin-top: 28px;
  color: var(--text);
  font-size: clamp(1.02rem, 1.8vw, 1.24rem);
  line-height: 1.72;
}

.hero-body strong {
  color: var(--accent-2);
  font-weight: 600;
}

.hero-actions {
  margin-top: 30px;
}

.problem-board {
  display: grid;
  gap: 12px;
}

.signal-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.signal-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, var(--danger-dim), transparent 46%),
    linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.12));
}

.signal-header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-list {
  position: relative;
  display: grid;
}

.signal-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  min-height: 74px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}

.signal-row:last-child {
  border-bottom: 0;
}

.signal-index {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.signal-title {
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.signal-copy {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.5;
}

.signal-value {
  color: var(--danger);
  font-family: var(--mono);
  font-size: 0.68rem;
  white-space: nowrap;
}

.diagnostic-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric-tile {
  min-height: 104px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.metric-value {
  color: var(--accent-3);
  font-family: var(--mono);
  font-size: 1.12rem;
  font-weight: 600;
}

.metric-label {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.45;
}

.section-block {
  margin-top: clamp(50px, 8vw, 96px);
}

.system-overview {
  display: grid;
  grid-template-columns: minmax(260px, 0.86fr) minmax(0, 1.14fr);
  gap: clamp(20px, 4vw, 44px);
  align-items: start;
}

.section-intro {
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.78;
}

.system-map {
  display: grid;
  gap: 12px;
}

.map-node {
  position: relative;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  min-height: 130px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.map-node::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, var(--teal-dim), transparent 52%);
}

.map-node[data-tone="ops"]::before {
  background: linear-gradient(90deg, var(--accent-dim), transparent 52%);
}

.map-node > * {
  position: relative;
}

.node-kicker {
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.node-index {
  margin-top: 8px;
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 2.1rem;
  font-weight: 600;
  line-height: 1;
}

.map-node[data-tone="ops"] .node-index {
  color: var(--accent);
}

.node-title {
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.node-copy {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.65;
}

.node-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.component-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.component-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 360px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.component-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, var(--accent-dim), transparent 44%),
    radial-gradient(circle at 92% 10%, var(--teal-dim), transparent 26%);
}

.component-card:hover {
  border-color: var(--accent-hi);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.component-card > * {
  position: relative;
}

.component-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.component-name {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.component-role {
  margin-top: 8px;
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.component-card[data-tone="ops"] .component-role {
  color: var(--accent);
}

.component-desc {
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.72;
}

.component-pipeline {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 26px;
}

.component-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.66rem;
}

.progress {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 130px;
}

.progress-track {
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}

.progress-label {
  min-width: 34px;
  text-align: right;
}

.method-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.method-step {
  min-height: 132px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.method-index {
  color: var(--accent-3);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
}

.method-title {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.method-copy {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.77rem;
  line-height: 1.55;
}

@media (max-width: 920px) {
  .problem-hero,
  .system-overview {
    grid-template-columns: 1fr;
  }

  .problem-hero {
    min-height: auto;
  }
}

@media (max-width: 720px) {
  .hero-title {
    font-size: clamp(2.8rem, 15vw, 4.5rem);
  }

  .hero-body {
    font-size: 0.99rem;
  }

  .diagnostic-strip,
  .component-grid,
  .method-strip {
    grid-template-columns: 1fr;
  }

  .signal-row {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  .signal-value {
    grid-column: 2;
  }

  .map-node {
    grid-template-columns: 1fr;
  }
}