/* =============================================================
   SPC Landing Page — layout & section styles
   Tokens + components come from the design system files.
   ============================================================= */

/* ---------- NAV ---------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--surface-card);
  border-bottom: 1px solid var(--border-hairline);
  transition: box-shadow var(--dur-fast) var(--ease-out);
}
.site-nav.is-scrolled {
  box-shadow: 0 1px 0 0 var(--concrete-20), 0 4px 16px -4px rgba(10,11,13,0.08);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: 0 var(--space-6);
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}
.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2px;
  margin-left: auto;
}
.nav-links .nav-link {
  font-size: 14px;
}
.nav-cta { flex-shrink: 0; }
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
  margin-left: auto;
}

/* ---------- SECTION BASE ---------- */
.section {
  padding: var(--space-24) 0;
}
.section--alt {
  background: var(--surface-alt);
}
.section--dark {
  background: var(--concrete-95);
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-16);
}
.section-label {
  display: block;
  margin-bottom: var(--space-3);
}
.section-sub {
  margin-top: var(--space-4);
}
.section-cta-row {
  text-align: center;
  margin-top: var(--space-12);
}

/* ---------- HERO ---------- */
.hero {
  background: var(--concrete-95);
  min-height: 88vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: var(--space-24) 0;
}
.hero > .container { width: 100%; }
.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      90deg,
      rgba(10, 11, 13, 0.85) 0%,
      rgba(10, 11, 13, 0.65) 55%,
      rgba(10, 11, 13, 0.35) 100%
    ),
    linear-gradient(
      180deg,
      rgba(10, 11, 13, 0.35) 0%,
      rgba(10, 11, 13, 0) 30%,
      rgba(10, 11, 13, 0) 70%,
      rgba(10, 11, 13, 0.45) 100%
    );
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
}
.hero-content {
  max-width: 720px;
}
.hero-eyebrow {
  display: block;
  margin-bottom: var(--space-6);
  color: var(--spc-red-500);
}
.hero-headline {
  color: var(--concrete-05);
  margin: 0 0 var(--space-6);
}
.hero-accent {
  font-style: normal;
  color: var(--spc-red-500);
}
.hero-sub {
  color: rgba(255, 255, 255, 0.78);
  max-width: 560px;
  margin-bottom: var(--space-10);
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero-actions .btn--outline {
  --btn-fg: var(--concrete-05);
  --btn-bd: rgba(255, 255, 255, 0.5);
}
.hero-actions .btn--outline:hover {
  --btn-bg: #fff;
  --btn-fg: var(--concrete-95);
  --btn-bd: #fff;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  flex-wrap: wrap;
}
.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-stat-num {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--concrete-05);
}
.hero-stat .t-label { color: rgba(255, 255, 255, 0.6); }
.hero-stat-div {
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.18);
}

/* ---------- PRODUCTS ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.product-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--concrete-15);
}
.product-card__media--dark .product-placeholder {
  background: var(--concrete-90);
}
.product-specs-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 4px;
}

/* ---------- WHY CHOOSE US ---------- */
.why-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: var(--space-16);
  align-items: start;
}
.why-left {
  position: sticky;
  top: 80px;
}
.why-right {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
}
.why-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border-hairline);
}
.why-item:nth-last-child(-n+2) { border-bottom: none; }
.why-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--spc-red-50);
  color: var(--spc-red-500);
  border: 1px solid var(--spc-red-100);
}
.why-item h3 { margin: 0 0 6px; }
.why-item p { margin: 0; }

/* ---------- APPLICATIONS ---------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.app-card {
  padding: var(--space-8);
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  transition: border-color var(--dur-normal) var(--ease-out), transform var(--dur-normal) var(--ease-out);
}
.app-card:hover {
  border-color: var(--concrete-95);
  transform: translateY(-2px);
}
.app-icon {
  margin-bottom: var(--space-5);
}
.app-card h3 { margin: 0 0 8px; }
.app-card p { margin: 0; }

/* ---------- PROJECTS ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.project-card {
  background: var(--concrete-90);
  border: 1px solid var(--concrete-80);
  display: flex;
  flex-direction: column;
}
.project-card__img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.project-img-placeholder {
  width: 100%;
  height: 100%;
}
.project-img-placeholder--highway {
  background: linear-gradient(160deg, #2a2e35 0%, #1a1e24 60%, #333a44 100%);
}
.project-img-placeholder--commercial {
  background: linear-gradient(160deg, #303540 0%, #1e2329 60%, #2a3040 100%);
}
.project-img-placeholder--residential {
  background: linear-gradient(160deg, #252930 0%, #1a1d22 60%, #2e3338 100%);
}
.project-card__tag {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  background: var(--spc-red-500);
  color: #fff;
  padding: 4px 8px;
}
.project-card__body {
  padding: var(--space-6);
  flex: 1;
}
.project-card__body h3 { margin: 0 0 8px; }
.project-card__body p { margin: 0; }

/* ---------- TESTIMONIALS ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.testimonial {
  margin: 0;
  padding: var(--space-8);
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transition: border-color var(--dur-normal) var(--ease-out);
}
.testimonial:hover { border-color: var(--concrete-95); }
.testimonial-quote { flex-shrink: 0; }
.testimonial-text {
  flex: 1;
  margin: 0;
  font-style: italic;
  color: var(--text-primary);
}
.testimonial-footer {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-hairline);
}
.testimonial-avatar {
  width: 36px;
  height: 36px;
  background: var(--concrete-95);
  color: var(--concrete-05);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ---------- CLIENTS / SOCIAL PROOF ---------- */
.clients-band {
  padding: var(--space-12) 0;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  background: var(--surface-alt);
}
.clients-header {
  text-align: center;
  margin-bottom: var(--space-8);
}
.clients-eyebrow {
  display: block;
  color: var(--spc-red-500);
  margin-bottom: var(--space-2);
}
.clients-sub {
  margin: 0 auto;
  max-width: 560px;
}
.clients-logos {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  border: 1px solid var(--border-hairline);
  background: var(--surface-card);
}
.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 88px;
  padding: 0 var(--space-6);
  border-right: 1px solid var(--border-hairline);
  transition: background var(--dur-fast) var(--ease-out);
}
.client-logo:last-child { border-right: none; }
.client-logo:hover { background: var(--surface-alt); }
.client-logo img {
  max-width: 120px;
  max-height: 52px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(1) opacity(0.5);
  transition: filter var(--dur-normal) var(--ease-out);
}
.client-logo:hover img {
  filter: grayscale(0) opacity(1);
}

/* ---------- PROCESS ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
  padding: 60px 0 var(--space-12);
}

/* Horizontal timeline rule */
.process-rule {
  position: absolute;
  top: 200px;
  left: 0;
  right: 0;
  height: 0;
  border-top: 1px dashed var(--concrete-30);
  pointer-events: none;
  z-index: 0;
}
.process-rule__node {
  position: absolute;
  top: -4px;
  width: 8px;
  height: 8px;
  background: var(--spc-red-500);
  transform: translateX(-50%);
}
.process-rule__node:nth-child(1) { left: 16.667%; }
.process-rule__node:nth-child(2) { left: 50%; }
.process-rule__node:nth-child(3) { left: 83.333%; }

.process-step {
  position: relative;
  padding: 0 var(--space-6);
  text-align: center;
  z-index: 1;
}
.process-step--offset {
  top: 40px;
}

.process-num {
  display: block;
  font-family: var(--font-display);
  font-size: 160px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--spc-red-500);
  text-stroke: 1px var(--spc-red-500);
  margin: -50px 0 var(--space-10);
}

.process-body {
  max-width: 360px;
  margin: 0 auto;
}
.process-body h3 { margin: 0 0 8px; }
.process-body p  { margin: 0; }
.process-connector { display: none; }

/* ---------- CERTIFICATIONS ---------- */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.cert-card {
  padding: var(--space-8);
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--dur-normal) var(--ease-out);
}
.cert-card:hover { border-color: var(--spc-red-500); }
.cert-mark { flex-shrink: 0; }
.cert-card h3 { margin: 0; }
.cert-card p  { margin: 0; }

/* ---------- ABOUT ---------- */
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-16);
  align-items: start;
}
.about-img-wrap {
  background: var(--concrete-15);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-hairline);
}
.about-img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--concrete-40);
}
.about-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-hairline);
  border: 1px solid var(--border-hairline);
  margin-top: var(--space-4);
}
.about-num-item {
  background: var(--surface-card);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.about-num-val {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}
.about-content { padding-top: var(--space-4); }
.about-content h2 { margin: var(--space-3) 0 0; }
.about-content p  { margin: 0; }
.about-values {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

/* ---------- CTA BAND ---------- */
.cta-band {
  background: var(--concrete-95);
  padding: var(--space-20) 0;
}
.cta-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-12);
}
.cta-band-actions {
  display: flex;
  gap: var(--space-4);
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* ---------- CONTACT ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-16);
  align-items: start;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.contact-detail {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}
.contact-detail-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
}
.contact-detail-icon svg {
  width: 16px;
  height: 16px;
  stroke: var(--spc-red-500);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
.contact-detail-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding-top: 2px;
}
.contact-detail-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}
.contact-detail-value {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.55;
  margin: 0;
}
.contact-detail-value a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.15s;
}
.contact-detail-value a:hover { color: var(--spc-red-500); }
.contact-form-wrap {
  background: var(--surface-card);
  border: 1px solid var(--border-hairline);
  padding: var(--space-10);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* ---------- FOOTER ---------- */
.site-footer {
  background: var(--concrete-99);
  border-top: 1px solid var(--concrete-80);
  padding: var(--space-16) 0 var(--space-8);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--concrete-80);
}
.footer-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-nav-list a {
  font-size: 14px;
  color: var(--concrete-50);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.footer-nav-list a:hover { color: var(--concrete-05); }
.footer-contact-link {
  font-size: 14px;
  color: var(--concrete-40);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact-link:hover { color: var(--concrete-05); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-bottom-links {
  display: flex;
  gap: var(--space-6);
}
.footer-bottom-links a {
  font-size: 12px;
  color: var(--concrete-60);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.footer-bottom-links a:hover { color: var(--concrete-05); }

.footer-social {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-5);
}
.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--concrete-80);
  color: var(--concrete-50);
  text-decoration: none;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.footer-social-link:hover {
  border-color: var(--spc-red-500);
  color: var(--spc-red-500);
}

/* ---------- SCROLL ANIMATION ---------- */
.animate-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.animate-in.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1100px) {
  .hero { min-height: auto; }
  .why-layout { grid-template-columns: 1fr; }
  .why-left { position: static; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: var(--space-10); }
}

@media (max-width: 768px) {
  .section { padding: var(--space-16) 0; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface-card);
    border-top: 1px solid var(--border-hairline);
    border-bottom: 1px solid var(--border-hairline);
    flex-direction: column;
    padding: var(--space-4) var(--space-6) var(--space-6);
    gap: 0;
    z-index: var(--z-overlay);
    box-shadow: 0 24px 48px -16px rgba(10, 11, 13, 0.18);
  }
  .nav-links.is-open { display: flex; }
  .nav-links li { list-style: none; }
  .nav-links .nav-link {
    display: flex;
    align-items: center;
    padding: var(--space-4) 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-hairline);
    text-decoration: none;
    transition: color 0.15s;
  }
  .nav-links .nav-link:hover,
  .nav-links .nav-link.is-active { color: var(--spc-red-500); }
  .nav-links .nav-link.is-active { border-color: transparent; background: none; }
  .nav-links li:last-child .nav-link { border-bottom: none; }
  .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .nav-inner { position: relative; }
  .hero-stats { flex-wrap: wrap; gap: var(--space-6); }
  .hero-stat-div { display: none; }
  .product-grid { grid-template-columns: 1fr; }
  .why-right { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; padding: var(--space-4) 0; }
  .process-rule { display: none; }
  .process-step { padding: var(--space-8) 0; text-align: left; border-bottom: 1px solid var(--border-hairline); }
  .process-step:last-child { border-bottom: none; }
  .process-step--offset { top: 0; }
  .process-num { font-size: 96px; margin: 0 0 var(--space-4); text-align: left; }
  .process-body { max-width: none; margin: 0; }
  .certs-grid { grid-template-columns: 1fr 1fr; }
  .clients-logos { grid-template-columns: repeat(3, 1fr); }
  .client-logo { border-right: 1px solid var(--border-hairline); border-bottom: 1px solid var(--border-hairline); }
  .client-logo:nth-child(3n) { border-right: none; }
  .client-logo:nth-last-child(-n+3) { border-bottom: none; }
  .about-layout { grid-template-columns: 1fr; }
  .cta-band-inner { flex-direction: column; align-items: flex-start; }
  .contact-layout { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .container { --container-pad: 20px; }
}

@media (max-width: 480px) {
  .app-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .clients-logos { grid-template-columns: repeat(2, 1fr); }
  .client-logo:nth-child(3n) { border-right: 1px solid var(--border-hairline); }
  .client-logo:nth-child(2n) { border-right: none; }
  .client-logo:nth-last-child(-n+3) { border-bottom: 1px solid var(--border-hairline); }
  .client-logo:nth-last-child(-n+2) { border-bottom: none; }
}