/* ==========================================================================
   Why Sanmei — /why-sanmei/
   Page-scoped styles for page-why-sanmei.php. Loaded on this route only
   (functions.php enqueues assets/css/pages/<slug>.css).
   Shared classes (.site-container, .page-hero, .page-hero-title,
   .page-hero-lead, .tech-eyebrow, .section-header, .section-title,
   .section-sub, .btn, .image-frame, .ratio-*, .spec-list/.spec-row/
   .spec-label/.spec-value) come from style.css and are extended here only,
   never redefined. Every class introduced here is prefixed .why-.
   ========================================================================== */

/* ---------------------------------------------------------------
   01 Hero
--------------------------------------------------------------- */
.why-hero {
  padding-bottom: 64px;
}

.why-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: center;
}

.why-hero-copy .page-hero-lead {
  max-width: 620px;
}

.why-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.why-hero-facts {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.why-hero-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background-color: #ffffff;
}

.why-hero-fact-value {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.why-hero-fact-unit {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-body);
}

.why-hero-fact-label {
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--color-muted);
}

.why-hero-media {
  margin: 0;
}

/* ---------------------------------------------------------------
   02 Section bands (white / soft alternate, single borders)
--------------------------------------------------------------- */
.why-replacement,
.why-models,
.why-development,
.why-service,
.why-expansion {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
  background-color: #ffffff;
}

.why-precision,
.why-consumables,
.why-quality,
.why-equipment {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
  background-color: var(--color-surface-soft);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* Cards on white bands sit on the soft tone; cards on soft bands stay white. */
.why-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 30px 26px;
}

.why-card.is-soft {
  background-color: var(--color-surface-soft);
}

.why-card-title {
  font-size: 1.0625rem;
  margin-bottom: 10px;
}

.why-card-text {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-body);
  margin: 0;
}

.why-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.why-card-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.why-subheading {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.why-note {
  margin-top: 24px;
  max-width: 820px;
  padding-left: 16px;
  border-left: 2px solid var(--color-copper);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-muted);
}

.why-note a {
  font-weight: 600;
}

/* Value column of a .spec-row that carries text instead of a measurement. */
.why-spec-text {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  white-space: normal;
  text-align: right;
}

/* ---------------------------------------------------------------
   03 Stable replacement capability
--------------------------------------------------------------- */
.why-reference-strip {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: center;
  margin-top: 32px;
  padding: 32px;
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-copper);
  border-radius: var(--radius-card);
}

.why-reference-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-body);
}

.why-reference-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
}

.why-reference-item {
  position: relative;
  padding-left: 20px;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-ink);
}

.why-reference-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background-color: var(--color-accent);
}

/* ---------------------------------------------------------------
   04 Precision manufacturing
--------------------------------------------------------------- */
.why-precision-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
}

.why-precision-content .section-sub {
  margin-bottom: 32px;
}

.why-precision-media {
  margin: 0;
}

.why-inhouse-grid {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.why-inhouse-item {
  padding: 28px 24px;
  background-color: #ffffff;
}

.why-inhouse-mark {
  display: block;
  width: 28px;
  height: 2px;
  margin-bottom: 16px;
  background-color: var(--color-accent);
}

.why-inhouse-title {
  font-size: 1rem;
  margin-bottom: 8px;
}

.why-inhouse-text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-body);
}

/* ---------------------------------------------------------------
   05 Gun-model coverage
--------------------------------------------------------------- */
.why-model-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.why-model-card {
  padding: 28px 26px;
  background-color: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.why-model-card.is-accent {
  background-color: #ffffff;
  border-color: var(--color-accent);
}

.why-model-code {
  display: inline-block;
  margin-bottom: 16px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.why-model-title {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.why-model-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-body);
}

.why-model-media {
  margin: 48px 0 0;
}

/* ---------------------------------------------------------------
   06 Selected key consumables and components
--------------------------------------------------------------- */
.why-consumables .why-card-grid {
  align-items: stretch;
}

/* ---------------------------------------------------------------
   07 Development capability
--------------------------------------------------------------- */
.why-dev-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 56px;
  align-items: start;
}

.why-dev-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.why-dev-step {
  display: flex;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border-subtle);
}

.why-dev-num {
  min-width: 28px;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
}

.why-dev-title {
  font-size: 1rem;
  margin-bottom: 6px;
}

.why-dev-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-body);
}

.why-dev-media {
  margin: 0;
}

/* ---------------------------------------------------------------
   08 Quality control
--------------------------------------------------------------- */
.why-quality-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: start;
}

.why-quality-stages {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.why-quality-stage {
  padding: 24px 22px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.why-quality-code {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.why-quality-title {
  font-size: 1rem;
  margin-bottom: 8px;
}

.why-quality-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-body);
}

.why-quality-specs {
  margin-top: 32px;
}

.why-quality-media {
  margin: 0;
}

/* ---------------------------------------------------------------
   09 Response and service
--------------------------------------------------------------- */
.why-service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.why-service-item {
  padding: 32px 30px;
  background-color: var(--color-surface-soft);
}

.why-service-title {
  font-size: 1.0625rem;
  margin-bottom: 10px;
}

.why-service-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-body);
}

/* ---------------------------------------------------------------
   10 Plasma and HVOF equipment capability
--------------------------------------------------------------- */
.why-equipment-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.why-equipment-panel {
  padding: 32px 30px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.why-equipment-tag {
  display: inline-block;
  margin-bottom: 16px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #ffffff;
  background-color: var(--color-accent);
  border-radius: 4px;
}

.why-equipment-title {
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.why-equipment-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.why-equipment-list li {
  position: relative;
  padding: 10px 0 10px 22px;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-body);
  border-top: 1px solid var(--color-border-subtle);
}

.why-equipment-list li:first-child {
  border-top: 0;
}

.why-equipment-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 19px;
  width: 8px;
  height: 1px;
  background-color: var(--color-copper);
}

.why-equipment-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 24px;
  padding: 28px 32px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.why-equipment-strip-text {
  margin: 0;
  max-width: 760px;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-body);
}

.why-equipment-strip .btn {
  flex-shrink: 0;
}

/* ---------------------------------------------------------------
   11 Long-term expansion logic
--------------------------------------------------------------- */
.why-path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 24px;
}

.why-path-step {
  position: relative;
  padding-top: 22px;
  border-top: 2px solid var(--color-border);
}

.why-path-step::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--color-accent);
}

.why-path-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-muted);
}

.why-path-title {
  font-size: 1rem;
  margin-bottom: 8px;
}

.why-path-text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-body);
}

/* ---------------------------------------------------------------
   12 CTA
--------------------------------------------------------------- */
.why-cta {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
  background-color: var(--color-surface-gray);
  border-top: 1px solid var(--color-border);
}

.why-cta-panel {
  padding: 56px 48px;
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
}

.why-cta-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  max-width: 720px;
  margin-bottom: 16px;
}

.why-cta-lead {
  max-width: 680px;
  margin-bottom: 28px;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-body);
}

.why-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.why-cta-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 0.9375rem;
}

.why-cta-links-label {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.why-cta-links a {
  font-weight: 600;
}

/* ---------------------------------------------------------------
   13 Responsive
--------------------------------------------------------------- */
@media (max-width: 1080px) {
  .why-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .why-hero-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .why-precision-layout,
  .why-dev-layout,
  .why-quality-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .why-precision-media,
  .why-dev-media,
  .why-quality-media {
    max-width: 640px;
  }

  .why-card-grid,
  .why-model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .why-inhouse-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .why-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px 24px;
  }
}

@media (max-width: 768px) {
  .why-hero {
    padding-bottom: 52px;
  }

  .why-replacement,
  .why-models,
  .why-development,
  .why-service,
  .why-expansion,
  .why-precision,
  .why-consumables,
  .why-quality,
  .why-equipment,
  .why-cta {
    padding-top: var(--space-section-mobile);
    padding-bottom: var(--space-section-mobile);
  }

  .why-hero-actions .btn,
  .why-cta-actions .btn {
    width: 100%;
  }

  .why-card-grid,
  .why-card-grid--two,
  .why-model-grid,
  .why-inhouse-grid,
  .why-quality-stages,
  .why-service-grid,
  .why-equipment-grid,
  .why-reference-list,
  .why-path {
    grid-template-columns: 1fr;
  }

  .why-hero-facts {
    grid-template-columns: 1fr;
  }

  .why-reference-strip {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 24px;
  }

  .why-inhouse-grid {
    margin-top: 36px;
  }

  .why-inhouse-item,
  .why-service-item,
  .why-model-card,
  .why-card,
  .why-quality-stage {
    padding: 24px 20px;
  }

  .why-equipment-panel {
    padding: 26px 22px;
  }

  .why-equipment-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
  }

  .why-model-media {
    margin-top: 32px;
  }

  .why-cta-panel {
    padding: 36px 24px;
  }

  .page-why-sanmei .spec-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .why-spec-text {
    text-align: left;
  }
}

@media (max-width: 420px) {
  .why-dev-step {
    gap: 14px;
  }

  .why-hero-fact {
    padding: 14px 16px;
  }

  .why-cta-links {
    gap: 8px 16px;
  }
}