/* ============================================
   SERVICE PAGE STYLES – CHS Intl
   Shared by all individual service pages:
   fea-structural-analysis.html, cfd-simulation.html,
   design-optimisation.html, acoustics-nvh.html,
   atex-compliance.html, ped-compliance.html
============================================ */

/* ============================================
   PAGE HEADER
============================================ */
.page-header {
  background: var(--bg-dark);
  border-bottom: 3px solid var(--accent);
  padding: 7rem 3.2rem 5.5rem;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(6, 14, 23, 0.96) 0%, rgba(0, 176, 212, 0.07) 100%);
}

.page-header__inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3.2rem;
  align-items: center;
}

@media (min-width: 800px) {
  .page-header__inner {
    grid-template-columns: 1fr auto;
  }
}

.page-header__text h1 {
  font-size: clamp(3rem, 5vw, 5.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.page-header__text p {
  font-size: 1.75rem;
  font-weight: 300;
  color: var(--text-on-dark-muted);
  max-width: 560px;
  line-height: 1.65;
  margin: 0 0 2.4rem;
}

.page-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 0.4rem;
}

.meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 0.5rem 1.2rem;
}

.meta-tag i {
  color: var(--accent);
  font-size: 1rem;
}

.page-header__img {
  width: 100%;
  max-width: 420px;
  height: 22rem;
  object-fit: cover;
  border-radius: var(--radius-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid var(--accent);
  filter: brightness(0.85);
}

/* ============================================
   BREADCRUMB
============================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 3.2rem;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--accent);
}

.breadcrumb a:hover {
  color: var(--accent-dark);
}

.breadcrumb__sep {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb__current {
  color: var(--text-primary);
  font-weight: 600;
}

/* ============================================
   TWO-COLUMN CONTENT LAYOUT
============================================ */
.service-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4.8rem;
  align-items: start;
}

@media (min-width: 900px) {
  .service-layout {
    grid-template-columns: 1fr 320px;
  }
}

/* ============================================
   MAIN CONTENT AREA
============================================ */
.service-content h2 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 3.2rem 0 1rem;
  padding-top: 3.2rem;
  border-top: 1px solid var(--border);
}

.service-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.service-content p {
  font-size: 1.6rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.2rem;
}

.service-content ul,
.service-content ol {
  margin: 1rem 0 1.6rem 2rem;
}

.service-content li {
  font-size: 1.55rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.6rem;
}

.service-content strong {
  color: var(--text-primary);
}

/* Capability checklist */
.checklist {
  list-style: none;
  margin: 1.2rem 0 2rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
}

@media (min-width: 600px) {
  .checklist {
    grid-template-columns: 1fr 1fr;
  }
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.2rem 1.6rem;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-card);
  font-size: 1.45rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.checklist li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--accent);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 0.15em;
}

/* Software / tools pills */
.tool-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.2rem 0 2rem;
  list-style: none;
  padding: 0;
}

.tool-list li {
  margin: 0;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 176, 212, 0.25);
  border-radius: var(--radius);
  padding: 0.5rem 1.4rem;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent-dark);
  text-transform: uppercase;
}

/* Standards / norms chips */
.norm-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.2rem 0 2rem;
  list-style: none;
  padding: 0;
}

.norm-list li {
  margin: 0;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 1.4rem;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Use-case / industry table */
.use-case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
  margin: 1.6rem 0 2.4rem;
}

@media (min-width: 560px) {
  .use-case-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.use-case-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--bg-white);
  transition: box-shadow .2s, transform .2s;
}

.use-case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.use-case-card__icon {
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 0.8rem;
}

.use-case-card__title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.use-case-card__text {
  font-size: 1.35rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Process steps */
.process-steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 1.6rem 0 2.4rem;
}

.process-steps li {
  counter-increment: step;
  display: flex;
  gap: 1.6rem;
  align-items: flex-start;
  margin-bottom: 1.4rem;
  padding: 1.6rem 2rem;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-card);
  transition: box-shadow .2s;
}

.process-steps li:hover {
  box-shadow: var(--shadow-sm);
}

.process-steps li::before {
  content: counter(step);
  background: var(--accent);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  min-width: 3.2rem;
  height: 3.2rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.process-steps li strong {
  color: var(--text-primary);
}

.process-steps li div {
  font-size: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   SIDEBAR
============================================ */
.service-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
}

.sidebar-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius-card);
  padding: 2.4rem;
}

.sidebar-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 1.6rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

/* CTA sidebar card */
.sidebar-cta {
  background: var(--bg-dark);
  border: none;
  border-radius: var(--radius-card);
  padding: 2.8rem 2.4rem;
  text-align: center;
}

.sidebar-cta__title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.8rem;
}

.sidebar-cta__text {
  font-size: 1.4rem;
  color: var(--text-on-dark-muted);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.sidebar-cta .btn {
  width: 100%;
  justify-content: center;
}

.sidebar-cta .btn+.btn {
  margin-top: 0.8rem;
}

/* Related services list */
.related-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.related-list li {
  margin: 0;
}

.related-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border-radius: var(--radius);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: background .15s, color .15s;
  text-decoration: none;
}

.related-list a:hover {
  background: var(--accent-dim);
  color: var(--accent-dark);
}

.related-list a.active {
  background: var(--accent-dim);
  color: var(--accent);
}

.related-list a i {
  font-size: 1rem;
  opacity: 0.5;
}

.related-list a:hover i,
.related-list a.active i {
  opacity: 1;
}

/* Key facts */
.facts-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.facts-list li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin: 0;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 1.4rem;
}

.facts-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.facts-list__label {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.facts-list__value {
  color: var(--text-secondary);
}

/* ============================================
   RELATED SERVICES CARDS (bottom of page)
============================================ */
.related-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 3.2rem;
}

@media (min-width: 560px) {
  .related-cards {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .related-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   BUSINESS VALUE STAT STRIP
============================================ */
.value-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 2.4rem 0 3.2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--bg-white);
}
@media (max-width: 600px) {
  .value-strip { grid-template-columns: 1fr; }
  .value-stat + .value-stat { border-top: 1px solid var(--border); border-left: none; }
}
.value-stat {
  padding: 2.4rem 2rem;
  text-align: center;
  border-left: 1px solid var(--border);
}
.value-stat:first-child { border-left: none; }
.value-stat__number {
  font-size: 3.6rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}
.value-stat__label {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ============================================
   CASE STUDY SNIPPET
============================================ */
.case-study {
  margin: 2.4rem 0 3.2rem;
  padding: 2.8rem 3.2rem;
  background: var(--bg-dark);
  border-radius: var(--radius-card);
  border-left: 4px solid var(--accent);
  position: relative;
  overflow: hidden;
}
.case-study::before {
  content: '\201C';
  position: absolute;
  top: -1rem;
  right: 2rem;
  font-size: 12rem;
  line-height: 1;
  color: rgba(0,176,212,0.08);
  font-family: Georgia, serif;
  pointer-events: none;
}
.case-study__label {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.case-study__label::before {
  content: '';
  display: inline-block;
  width: 2rem;
  height: 2px;
  background: var(--accent);
}
.case-study__title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.3;
}
.case-study__body {
  font-size: 1.5rem;
  color: var(--text-on-dark-muted);
  line-height: 1.75;
  margin-bottom: 1.6rem;
}
.case-study__result {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  background: rgba(0,176,212,0.12);
  border: 1px solid rgba(0,176,212,0.3);
  border-radius: var(--radius);
  padding: 0.8rem 1.6rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
}

/* ============================================
   FAQ ACCORDION
============================================ */
.faq-list {
  margin: 1.6rem 0 2.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow .2s;
}
.faq-item[open] {
  box-shadow: var(--shadow-md);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.6rem;
  padding: 1.6rem 2rem;
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  font-size: 2rem;
  font-weight: 300;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform .25s;
}
.faq-item[open] .faq-question::after {
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 2rem 1.8rem;
  border-top: 1px solid var(--border);
}
.faq-answer p {
  font-size: 1.5rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin: 1.2rem 0 0;
}

/* ============================================
   INLINE IMAGE
============================================ */
.content-img {
  width: 100%;
  max-height: 28rem;
  object-fit: cover;
  border-radius: var(--radius-card);
  border-left: 3px solid var(--accent);
  margin: 2rem 0 2.4rem;
}