:root {
  --bg: #eef2f7;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --text: #1c2230;
  --muted: #5e6777;
  --line: rgba(15, 23, 42, 0.05);
  --brand: #c55c2b;
  --brand-dark: #8b3c18;
  --accent: #0f7b6c;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  --radius: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f4f7fb 0%, var(--bg) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(15, 23, 42, 0.16) 0.6px, transparent 0.8px),
    radial-gradient(circle at 80% 30%, rgba(15, 23, 42, 0.12) 0.5px, transparent 0.8px);
  background-size: 24px 24px, 32px 32px;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
p { margin: 0 0 1rem; line-height: 1.75; }
h1, h2, h3 { margin: 0 0 1rem; font-family: "Space Grotesk", sans-serif; line-height: 1.1; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
  position: relative;
  z-index: 1;
}

.site-header,
.hero,
.page-hero,
.info-card,
.route-card,
.metric-card,
.material-card,
.post-card,
.contact-card,
.quote-box,
.table-wrap,
.contact-form,
.article-layout {
  backdrop-filter: blur(10px);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-radius: 999px;
}

.brand { display: flex; align-items: center; gap: 14px; }
.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); font-size: 0.85rem; }

.brand-logo {
  width: 68px;
  height: 68px;
  object-fit: contain;
  flex-shrink: 0;
}

.site-nav { display: flex; align-items: center; gap: 8px; }

.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 12px;
}

.nav-parent-link {
  display: inline-flex;
  align-items: center;
}

.nav-submenu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--muted);
  font: inherit;
  cursor: pointer;
  transition: background-color 220ms cubic-bezier(0.22, 1, 0.36, 1), color 220ms cubic-bezier(0.22, 1, 0.36, 1), transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-submenu-toggle:hover,
.nav-dropdown.is-open .nav-submenu-toggle,
.nav-dropdown.is-active .nav-submenu-toggle {
  background: rgba(197, 92, 43, 0.12);
  color: var(--text);
}

.nav-submenu-toggle span {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1;
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-dropdown.is-open .nav-submenu-toggle span {
  transform: rotate(45deg);
}

.nav-submenu {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  min-width: 220px;
  padding: 10px;
  display: grid;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(2px);
  border-radius: 20px;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transition: opacity 220ms cubic-bezier(0.22, 1, 0.36, 1), transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 20;
}

.nav-submenu a {
  padding: 12px 14px;
  border-radius: 16px;
  color: var(--muted);
}

.nav-dropdown:hover .nav-submenu,
.nav-dropdown:focus-within .nav-submenu,
.nav-dropdown.is-open .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), background-color 260ms cubic-bezier(0.22, 1, 0.36, 1), color 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.site-nav a:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(31, 35, 48, 0.1);
}

.site-nav a:hover,
.site-nav a.is-active {
  background: rgba(197, 92, 43, 0.12);
  color: var(--text);
}

.nav-toggle {
  display: none;
  border: 0;
  background: var(--brand);
  color: white;
  border-radius: 999px;
  padding: 10px 14px;
  font: inherit;
}

.hero {
  position: relative;
  overflow: hidden;
  margin-top: 28px;
  border-radius: 36px;
  padding: 42px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero-with-art::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(255, 253, 250, 0.78) 0%, rgba(255, 253, 250, 0.62) 38%, rgba(255, 253, 250, 0.42) 100%),
    url("../hero-polymers.png");
  background-repeat: no-repeat, no-repeat;
  background-position: center center, right center;
  background-size: cover, min(58%, 760px);
  opacity: 0.82;
  pointer-events: none;
}

.hero-with-art .metric-card,
.hero-with-art .metric-grid article {
  background: rgba(255, 255, 255, 0.36);
  border-color: rgba(28, 34, 48, 0.08);
}

.hero h1,
.page-hero h1 {
  font-size: clamp(2.3rem, 5vw, 4.8rem);
  max-width: 16ch;
}

.hero h1 {
  max-width: 12ch;
}
.lead { font-size: 1.08rem; color: var(--muted); max-width: 62ch; }

.eyebrow {
  margin-bottom: 0.8rem;
  color: var(--brand-dark);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

.hero-actions,
.section-heading,
.split-panel,
.contact-layout { display: flex; gap: 16px; }

.hero-actions { margin-top: 28px; flex-wrap: wrap; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--brand);
  color: white;
  font-weight: 700;
  border: 0;
  cursor: pointer;
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1), background-color 260ms cubic-bezier(0.22, 1, 0.36, 1), color 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.button-secondary { background: rgba(15, 123, 108, 0.14); color: var(--accent); }

.button:hover {
  transform: translateY(-3px) scale(1.015);
  box-shadow: 0 18px 36px rgba(31, 35, 48, 0.18);
}

.button-secondary:hover {
  background: rgba(15, 123, 108, 0.2);
}

.hero-panel { display: grid; gap: 16px; }

.metric-card,
.metric-grid article,
.info-card,
.route-card,
.material-card,
.post-card,
.contact-card,
.quote-box,
.table-wrap,
.contact-form,
.article-layout { border-radius: var(--radius); padding: 24px; }

.metric-card span,
.tag,
.post-meta {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 123, 108, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.metric-grid article { background: var(--surface-strong); }
.metric-grid strong, .info-card h3, .route-card h3, .material-card h3, .post-card h2, .contact-card h2 { display: block; margin-bottom: 8px; }

.section, .page-main { margin-top: 28px; }
.page-hero { padding: 36px; border-radius: 32px; }
.section-heading {
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}
.section-heading h2 {
  max-width: 22ch;
  font-size: clamp(1.8rem, 3vw, 3rem);
}
.section-heading .lead,
.section-heading > p:not(.eyebrow) {
  max-width: 72ch;
}
.section > .table-wrap,
.section > .engineering-flow-shell,
.section > .classification-map-shell {
  margin-top: 0;
}

.spotlight .route-card,
.about-discovery-shell,
.about-purpose-copy,
.about-purpose-quote,
.filter-panel,
.preview-panel,
.problem-card,
.faq-item,
.category-card,
.engineering-flow-shell,
.classification-map-shell {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.about-discovery-shell,
.about-purpose-copy,
.about-purpose-quote,
.engineering-flow-shell,
.classification-map-shell,
.filter-panel,
.preview-panel {
  background: #f1f4f8;
}

.about-hero {
  position: relative;
  display: grid;
  align-items: center;
  align-content: center;
  overflow: hidden;
  min-height: 620px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(252, 249, 244, 0.82)),
    var(--surface);
}

.about-hero h1 {
  max-width: none;
  font-size: clamp(2.2rem, 3.6vw, 3.4rem);
  margin-bottom: 4px;
  color: #151c28;
  letter-spacing: -0.02em;
}

.about-hero-copy {
  position: relative;
  z-index: 2;
  width: min(1180px, 100%);
  display: grid;
  gap: 16px;
  margin-inline: auto;
  padding: 34px 36px 30px;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.48);
  box-shadow: 0 22px 52px rgba(24, 30, 42, 0.07);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: left;
}

.about-hero-text {
  display: grid;
  gap: 14px;
}

.about-hero-text p {
  color: #2d3748;
  max-width: 100%;
  margin: 0;
  text-align: left;
  line-height: 1.65;
  font-size: 1.04rem;
  font-weight: 500;
}

.about-hero-text strong {
  font-weight: 800;
  color: #172032;
  background: linear-gradient(180deg, rgba(66, 118, 255, 0.14), rgba(66, 118, 255, 0.14));
  border-radius: 999px;
  padding: 0.04em 0.38em;
}

.about-signature {
  margin-top: 2px;
  padding-top: 18px;
  border-top: 1px solid rgba(28, 34, 48, 0.1);
  padding-left: 22px;
  position: relative;
  font-size: 1.18rem;
  font-weight: 800;
  color: #172032;
  letter-spacing: 0.01em;
  text-align: left;
}

.about-signature::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 4px;
  height: 1.4em;
  border-radius: 999px;
  background: rgba(66, 118, 255, 0.92);
}

.about-image-band {
  position: absolute;
  inset: 0;
  z-index: 0;
  min-height: 100%;
  pointer-events: none;
}

.about-image-band::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(252, 249, 244, 0.56) 0%, rgba(252, 249, 244, 0.18) 22%, rgba(252, 249, 244, 0.08) 50%, rgba(252, 249, 244, 0.2) 78%, rgba(252, 249, 244, 0.56) 100%),
    linear-gradient(90deg, rgba(252, 249, 244, 0.12), rgba(252, 249, 244, 0.03) 18%, rgba(252, 249, 244, 0.03) 82%, rgba(252, 249, 244, 0.12));
}

.about-image-track {
  position: relative;
  min-height: 100%;
  height: 100%;
}

.about-image-frame {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  transition: opacity 1000ms ease-in-out;
}

.about-image-frame.is-active {
  opacity: 1;
}

.about-image-frame img {
  width: 100%;
  min-height: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center center;
  opacity: 0.82;
  filter: saturate(0.94) contrast(0.98) brightness(0.99);
  transform: scale(1.01);
}

.about-image-frame:nth-child(1) img {
  object-position: center 42%;
  transform: scale(1.04);
}

.about-image-frame:nth-child(2) img {
  object-position: center 50%;
  transform: scale(1.02);
}

.about-image-frame:nth-child(3) img {
  object-position: center 46%;
  transform: scale(1.03);
}

.about-image-frame:nth-child(4) img {
  object-position: center 38%;
  transform: scale(1.05);
}

.about-image-placeholder {
  min-height: 280px;
  border-radius: 26px;
  border: 1px solid rgba(28, 34, 48, 0.08);
  background:
    linear-gradient(180deg, rgba(250, 250, 248, 0.92), rgba(236, 239, 241, 0.9)),
    rgba(255, 255, 255, 0.9);
  box-shadow: 0 18px 40px rgba(31, 35, 48, 0.1);
  display: grid;
  align-content: end;
  gap: 6px;
  padding: 22px;
}

.about-image-placeholder span {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.08rem;
  font-weight: 700;
}

.about-image-placeholder small {
  color: var(--muted);
  font-size: 0.9rem;
}

.about-discovery-section {
  margin-top: 18px;
}

.about-discovery-shell {
  padding: 28px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(248, 246, 241, 0.88)),
    var(--surface);
  border: 1px solid rgba(27, 34, 48, 0.07);
  box-shadow: 0 22px 48px rgba(27, 34, 48, 0.08);
}

.about-discovery-heading {
  margin-bottom: 22px;
}

.about-discovery-heading h2 {
  max-width: none;
  margin: 0;
  font-size: clamp(2rem, 3vw, 3.1rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: #161d29;
}

.about-discovery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.about-discovery-card {
  padding: 22px 20px 20px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(27, 34, 48, 0.05);
  box-shadow: 0 14px 30px rgba(27, 34, 48, 0.07);
  transition:
    transform 260ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.about-discovery-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 18px 36px rgba(27, 34, 48, 0.1);
  border-color: rgba(66, 118, 255, 0.12);
}

.about-discovery-card h3 {
  margin: 0 0 10px;
  font-size: 1.34rem;
  line-height: 1.2;
  color: #18202d;
}

.about-discovery-card p {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.65;
  color: #4a5769;
}

.about-discovery-card-wide {
  grid-column: 1 / -1;
  max-width: 760px;
  width: 100%;
  justify-self: center;
}

.about-purpose-section {
  margin-top: 18px;
}

.about-purpose-panel {
  align-items: stretch;
}

.about-purpose-copy,
.about-purpose-quote {
  border-radius: 28px;
  border: 1px solid rgba(27, 34, 48, 0.07);
  box-shadow: 0 18px 42px rgba(27, 34, 48, 0.07);
}

.about-purpose-copy {
  padding: 28px 30px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(247, 245, 240, 0.9)),
    var(--surface);
}

.about-purpose-copy h2 {
  margin: 0 0 14px;
  max-width: none;
  font-size: clamp(1.8rem, 2.6vw, 2.5rem);
  letter-spacing: -0.03em;
  color: #161d29;
}

.about-purpose-copy p {
  margin: 0;
  color: #4b5869;
  line-height: 1.7;
  font-size: 1.02rem;
}

.about-purpose-copy p + p {
  margin-top: 12px;
}

.about-purpose-quote {
  position: relative;
  display: grid;
  align-content: center;
  gap: 12px;
  min-height: 100%;
  padding: 28px 30px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(242, 246, 251, 0.88)),
    rgba(255, 255, 255, 0.9);
}

.about-purpose-quote::before {
  content: "";
  position: absolute;
  inset: 18px auto 18px 18px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(66, 118, 255, 0.92), rgba(66, 118, 255, 0.36));
}

.about-purpose-quote p {
  margin: 0;
  padding-left: 16px;
  font-size: clamp(1.24rem, 2.1vw, 1.72rem);
  line-height: 1.42;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #182130;
}

.about-benefit-card h3 {
  margin-bottom: 14px;
  padding-bottom: 12px;
  position: relative;
}

.about-benefit-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(66, 118, 255, 0.92), rgba(66, 118, 255, 0.34));
}

.card-grid { display: grid; gap: 16px; }
.four-up { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.route-card { transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), border-color 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1); }
.route-card:hover {
  transform: translateY(-4px) scale(1.015);
  border-color: rgba(197, 92, 43, 0.36);
  box-shadow: 0 26px 56px rgba(31, 35, 48, 0.18);
}

.thermoplastic-slider-shell {
  backdrop-filter: blur(10px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 251, 246, 0.82)),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 32px;
  padding: 26px;
  overflow: hidden;
}

.thermoplastic-slider-heading {
  margin-bottom: 16px;
}

.thermoplastic-slider-heading h2 {
  max-width: none;
  white-space: nowrap;
}

.thermoplastic-slider {
  display: grid;
  gap: 18px;
}

.thermoplastic-slider-window {
  overflow: hidden;
  border-radius: 28px;
}

.thermoplastic-slider-viewport {
  display: flex;
  min-height: 500px;
  will-change: transform;
  transform: translateX(0);
  transition: transform 920ms cubic-bezier(0.65, 0.05, 0.36, 1);
}

.thermoplastic-panel {
  position: relative;
  flex: 0 0 100%;
  display: grid;
  align-content: start;
  gap: 18px;
  min-width: 100%;
  opacity: 0.72;
  transform: scale(0.985);
  transition: opacity 920ms ease-in-out, transform 920ms ease-in-out;
}

.thermoplastic-panel.is-active {
  opacity: 1;
  transform: scale(1);
}

.thermoplastic-panel-copy {
  max-width: 68ch;
  padding-left: 12px;
}

.thermoplastic-panel-copy .lead {
  margin-bottom: 0.85rem;
}

.thermoplastic-panel-copy h3,
.thermoplastic-feature-card h4,
.thermoplastic-balance-card h4 {
  font-family: "Space Grotesk", sans-serif;
}

.thermoplastic-visual-grid,
.thermoplastic-balance-grid {
  display: grid;
  gap: 14px;
}

.thermoplastic-visual-grid.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.thermoplastic-visual-grid.four-up {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.thermoplastic-feature-card,
.thermoplastic-balance-card {
  backdrop-filter: blur(10px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.82)),
    rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(28, 34, 48, 0.08);
  box-shadow: 0 18px 38px rgba(31, 35, 48, 0.1);
  border-radius: 24px;
  padding: 16px;
}

.thermoplastic-feature-card p,
.thermoplastic-balance-card li {
  color: var(--muted);
}

.thermoplastic-feature-card h4,
.thermoplastic-balance-card h4 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.thermoplastic-image-slot {
  min-height: 128px;
  border-radius: 20px;
  margin-bottom: 12px;
  margin-left: 0;
  margin-right: 0;
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--text);
  border: 1px dashed rgba(28, 34, 48, 0.14);
  background:
    radial-gradient(circle at top left, rgba(197, 92, 43, 0.14), transparent 42%),
    radial-gradient(circle at bottom right, rgba(15, 123, 108, 0.14), transparent 38%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(248, 243, 236, 0.92));
  overflow: hidden;
}

.thermoplastic-image-slot span,
.thermoplastic-image-slot small {
  display: block;
}

.thermoplastic-image-slot span {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.thermoplastic-image-slot small {
  color: var(--muted);
}

.thermoplastic-card-image {
  width: 100%;
  height: 100%;
  min-height: 128px;
  display: block;
  object-fit: cover;
  border-radius: 14px;
}

.optional-image-slot {
  min-height: 128px;
  max-height: none;
}

.optional-image-slot .thermoplastic-card-image {
  min-height: 128px;
  max-height: none;
  object-position: center;
}

.thermoplastic-balance-card ul {
  margin: 0;
  padding-left: 20px;
}

.thermoplastic-balance-card li + li {
  margin-top: 0.45rem;
}

.thermoplastic-inline-list {
  margin-bottom: 0;
  color: var(--muted);
}

.thermoplastic-slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.classification-guide-shell {
  padding: 14px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(251, 248, 242, 0.82)),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.classification-guide-frame {
  position: relative;
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16 / 7.5;
  background:
    linear-gradient(180deg, rgba(248, 250, 253, 0.96), rgba(255, 255, 255, 0.9));
}

.classification-guide-frame::before,
.classification-guide-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  z-index: 1;
  pointer-events: none;
}

.classification-guide-frame::before {
  top: 0;
  height: 14%;
  background: linear-gradient(180deg, rgba(250, 251, 253, 0.92), rgba(250, 251, 253, 0));
}

.classification-guide-frame::after {
  bottom: 0;
  height: 16%;
  background: linear-gradient(180deg, rgba(250, 251, 253, 0), rgba(250, 251, 253, 0.94));
}

.classification-guide-image {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  object-position: center top;
  filter: saturate(0.94) contrast(1.01);
}

.classification-map-shell {
  padding: 26px;
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(251, 248, 242, 0.88)),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.classification-map-heading {
  margin-bottom: 20px;
}

.polimer-container {
  max-width: none;
  margin: 0;
}

.polimer-header {
  text-align: center;
  margin-bottom: 14px;
}

.polimer-header h2 {
  margin-bottom: 10px;
  color: #1a2a6c;
  font-size: clamp(2rem, 3.2vw, 2.45rem);
  max-width: none;
}

.polimer-header p {
  max-width: 84ch;
  margin: 0 auto;
  font-size: 0.98rem;
  color: #4d5a6b;
  line-height: 1.62;
  font-weight: 500;
}

.polimer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
  align-items: stretch;
}

.category-card {
  background: #fff;
  border-radius: 18px;
  padding: 12px;
  box-shadow: 0 12px 24px rgba(0,0,0,0.05);
  border-top: 5px solid #3498db;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.category-card-natural { border-top-color: #2ecc71; }
.category-card-structure { border-top-color: #3498db; }
.category-card-monomer { border-top-color: #9b59b6; }
.category-card-thermal { border-top-color: #e67e22; }

.category-card h3 {
  margin-top: 0;
  margin-bottom: 0;
  font-size: 0.96rem;
  border-bottom: 1px solid #eee;
  padding-bottom: 6px;
  color: #243447;
  line-height: 1.35;
}

.sub-grid {
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  gap: 8px;
  margin-top: 8px;
  flex: 1;
}

.item {
  text-align: center;
  flex: 1;
}

.icon-placeholder {
  height: 42px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 5px;
  font-size: 1.4rem;
}

.chain-dots {
  display: flex;
  gap: 4px;
  justify-content: center;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #3498db;
}

.dot.orange { background: #e67e22; }
.dot.green { background: #2ecc71; }

.branch-chain {
  position: relative;
}

.branch-dot {
  position: absolute;
  top: 15px;
  left: 16px;
}

.item b {
  display: block;
  font-size: 0.82rem;
  color: #223246;
  margin-bottom: 2px;
  line-height: 1.35;
}

.item span {
  font-size: 0.74rem;
  color: #617184;
  line-height: 1.42;
  font-weight: 500;
}

.footer-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background: #eef2f3;
  padding: 12px 14px;
  border-radius: 16px;
  align-items: stretch;
}

.footer-title {
  font-weight: 800;
  margin-bottom: 4px;
  color: #2c3e50;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.footer-section p {
  font-size: 0.78rem;
  margin: 0;
  color: #4f5f70;
  line-height: 1.48;
  font-weight: 500;
}

.basic-structure-heading {
  margin-bottom: 22px;
}

.basic-structure-heading h2 {
  max-width: none;
}

.basic-structure-heading .lead {
  max-width: 78ch;
}

.basic-structure-grid {
  margin-bottom: 18px;
  align-items: stretch;
}

.basic-structure-grid > .info-card,
#uygulamalar .material-card {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.basic-structure-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: 20px;
  border: 1px solid rgba(51, 102, 173, 0.14);
  background: linear-gradient(180deg, rgba(244, 248, 253, 0.96), rgba(255, 255, 255, 0.9));
  box-shadow: 0 12px 28px rgba(31, 35, 48, 0.06);
  margin-top: 4px;
}

.basic-structure-note-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(47, 109, 246, 0.12);
  color: #2854a8;
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1;
}

.basic-structure-note-copy strong {
  display: block;
  margin-bottom: 6px;
  color: #243447;
  font-size: 0.94rem;
}

.basic-structure-note-copy p {
  margin: 0;
  color: #536274;
  line-height: 1.62;
}

.material-guidance-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 20px;
  border: 1px solid rgba(197, 92, 43, 0.14);
  background: linear-gradient(180deg, rgba(255, 248, 242, 0.94), rgba(255, 255, 255, 0.92));
  box-shadow: 0 12px 28px rgba(31, 35, 48, 0.06);
}

.material-guidance-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(197, 92, 43, 0.12);
  color: #b45527;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1;
}

.material-guidance-copy strong {
  display: block;
  margin-bottom: 6px;
  color: #243447;
  font-size: 0.94rem;
}

.newsletter-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 22px;
  align-items: center;
  padding: 28px 30px;
  border-radius: 28px;
  border: 1px solid rgba(28, 34, 48, 0.07);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(246, 249, 252, 0.9)),
    var(--surface);
  box-shadow: var(--shadow);
}

.newsletter-card-compact {
  margin-top: 4px;
}

.newsletter-copy h2 {
  margin-bottom: 10px;
  max-width: 18ch;
  font-size: clamp(1.7rem, 2.8vw, 2.35rem);
}

.newsletter-copy p:not(.eyebrow) {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
}

.newsletter-form {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(28, 34, 48, 0.06);
}

.newsletter-field {
  display: grid;
}

.newsletter-field input {
  width: 100%;
  min-height: 54px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 0 16px;
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.newsletter-field input:focus {
  outline: none;
  border-color: rgba(15, 123, 108, 0.26);
  box-shadow: 0 0 0 4px rgba(15, 123, 108, 0.08);
}

.newsletter-form .button {
  width: fit-content;
}

.newsletter-feedback {
  min-height: 1.5em;
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  line-height: 1.5;
}

.newsletter-feedback.is-error {
  color: var(--brand-dark);
}

.tds-entry-block {
  margin-top: 22px;
  display: grid;
  gap: 16px;
}

.tds-entry-heading {
  margin-bottom: 0;
}

.tds-entry-heading h3 {
  margin: 0;
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
}

.tds-entry-heading p:not(.eyebrow) {
  max-width: 74ch;
  color: var(--muted);
}

.tds-entry-grid {
  align-items: stretch;
}

.tds-entry-card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 249, 252, 0.9)),
    var(--surface);
}

.tds-entry-card p {
  margin-bottom: 18px;
}

.tds-entry-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  width: fit-content;
  padding: 0 16px;
  margin-top: auto;
  border-radius: 999px;
  background: rgba(15, 123, 108, 0.1);
  border: 1px solid rgba(15, 123, 108, 0.16);
  color: var(--accent);
  font-weight: 800;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.tds-entry-link:hover {
  transform: translateY(-1px);
  background: rgba(15, 123, 108, 0.16);
  border-color: rgba(15, 123, 108, 0.24);
}

.material-guidance-copy p {
  margin: 0;
  color: #586678;
  line-height: 1.62;
}

.slider-control-button {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(28, 34, 48, 0.12);
  background: rgba(255, 255, 255, 0.84);
  color: var(--text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1), border-color 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.slider-control-button:hover {
  transform: translateY(-2px);
  border-color: rgba(197, 92, 43, 0.24);
  box-shadow: 0 14px 28px rgba(31, 35, 48, 0.12);
}

.thermoplastic-slider-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.engineering-flow-shell {
  backdrop-filter: blur(10px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(252, 249, 244, 0.84)),
    var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 32px;
  padding: 28px;
}

.engineering-flow-heading {
  margin-bottom: 22px;
}

.engineering-flow-list {
  display: grid;
  gap: 16px;
}

.engineering-flow-layout {
  display: grid;
  grid-template-columns: minmax(340px, 0.92fr) minmax(0, 1.28fr);
  gap: 16px;
  align-items: start;
}

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

.engineering-problem-entry {
  display: grid;
  gap: 6px;
}

.engineering-flow-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px minmax(0, 1fr) 52px minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
}

.engineering-flow-card {
  backdrop-filter: blur(10px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.84)),
    rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(28, 34, 48, 0.08);
  box-shadow: 0 16px 34px rgba(31, 35, 48, 0.1);
  border-radius: 24px;
  padding: 16px;
}

.engineering-flow-problem {
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
  transition: transform 320ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 320ms ease-in-out, border-color 320ms ease-in-out, background-color 320ms ease-in-out;
}

.engineering-flow-problem:hover {
  transform: translateY(-2px);
  border-color: rgba(197, 92, 43, 0.24);
  box-shadow: 0 20px 38px rgba(31, 35, 48, 0.15);
}

.engineering-flow-problem.is-active {
  border-color: rgba(197, 92, 43, 0.36);
  box-shadow: 0 24px 46px rgba(31, 35, 48, 0.18);
  background:
    linear-gradient(180deg, rgba(255, 246, 240, 0.98), rgba(255, 255, 255, 0.88)),
    rgba(255, 255, 255, 0.9);
}

.engineering-flow-card h3 {
  font-size: 1.02rem;
  margin-bottom: 0.6rem;
}

.engineering-problem-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.engineering-priority-badge,
.engineering-type-tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
}

.engineering-priority-high {
  background: rgba(181, 57, 45, 0.14);
  color: #8a281f;
}

.engineering-priority-medium {
  background: rgba(197, 92, 43, 0.14);
  color: var(--brand-dark);
}

.engineering-priority-low {
  background: rgba(15, 123, 108, 0.14);
  color: #0d6b5e;
}

.engineering-type-tag {
  border: 1px solid rgba(28, 34, 48, 0.08);
}

.engineering-type-process {
  background: rgba(197, 92, 43, 0.08);
  color: #8b4b21;
}

.engineering-type-thermal {
  background: rgba(70, 120, 181, 0.1);
  color: #395d92;
}

.engineering-type-geometric {
  background: rgba(28, 34, 48, 0.08);
  color: #536071;
}

.engineering-type-material {
  background: rgba(15, 123, 108, 0.1);
  color: #0d6b5e;
}

.engineering-type-mold {
  background: rgba(90, 96, 112, 0.1);
  color: #4f5867;
}

.engineering-flow-card p,
.engineering-flow-card li {
  color: var(--muted);
}

.engineering-flow-problem p {
  margin-bottom: 0;
  line-height: 1.6;
}

.engineering-cause-preview {
  margin-top: 10px;
  font-size: 0.88rem;
  color: #667083;
}

.engineering-problem-detail-link {
  padding-left: 14px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #2b5fc3;
  text-decoration: none;
  transition: color 220ms ease, transform 220ms ease;
}

.engineering-problem-detail-link:hover {
  color: #1f4ea7;
  transform: translateX(2px);
}

.engineering-flow-card ul {
  margin: 0;
  padding-left: 18px;
}

.engineering-flow-card li + li {
  margin-top: 0.4rem;
}

.engineering-preview-panel {
  position: sticky;
  top: 24px;
}

.engineering-preview-inner {
  backdrop-filter: blur(10px);
  background:
    linear-gradient(180deg, rgba(255, 252, 248, 0.96), rgba(248, 245, 239, 0.9)),
    rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  border-left: 3px solid rgba(197, 92, 43, 0.26);
  box-shadow: var(--shadow);
  border-radius: 28px;
  padding: 22px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 360ms ease-in-out, transform 360ms ease-in-out;
}

.engineering-preview-inner.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.engineering-analysis-header {
  position: relative;
  margin-bottom: 18px;
  padding-left: 16px;
}

.engineering-analysis-header::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(197, 92, 43, 0.9), rgba(15, 123, 108, 0.78));
}

.engineering-analysis-header h3 {
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  margin-bottom: 0.9rem;
}

.engineering-analysis-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.engineering-analysis-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 800;
}

.engineering-analysis-badge-warm {
  background: rgba(197, 92, 43, 0.12);
  color: var(--brand-dark);
}

.engineering-analysis-badge-priority {
  background: rgba(181, 57, 45, 0.12);
  color: #8a281f;
  box-shadow: inset 0 0 0 1px rgba(138, 40, 31, 0.08);
}

.engineering-analysis-section + .engineering-analysis-section {
  margin-top: 14px;
}

.engineering-analysis-section h4 {
  margin-bottom: 0.7rem;
  font-size: 1rem;
}

.engineering-preview-description {
  color: var(--muted);
  max-width: 58ch;
  margin-bottom: 0;
}

.engineering-quick-diagnosis {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(244, 247, 250, 0.92), rgba(255, 255, 255, 0.82));
  border: 1px solid rgba(28, 34, 48, 0.08);
}

.engineering-quick-diagnosis-list {
  display: grid;
  gap: 6px;
}

.engineering-quick-diagnosis-list p,
.engineering-diagnosis-outcome {
  margin-bottom: 0;
  color: var(--muted);
}

.engineering-diagnosis-outcome {
  margin-top: 10px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}

.engineering-preview-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 52px minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  margin-top: 18px;
}

.engineering-preview-connector {
  min-height: 100%;
}

.engineering-analysis-list {
  margin: 0;
  padding-left: 18px;
}

.engineering-analysis-list li + li {
  margin-top: 0.55rem;
}

.engineering-analysis-causes li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.engineering-analysis-causes li span {
  flex: 1;
}

.engineering-analysis-causes li small {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  background: rgba(28, 34, 48, 0.08);
  color: #536071;
  font-size: 0.74rem;
  font-weight: 700;
}

.engineering-cause-list {
  display: grid;
  gap: 10px;
}

.engineering-cause-button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(28, 34, 48, 0.08);
  background: rgba(255, 255, 255, 0.76);
  color: var(--text);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), border-color 260ms ease-in-out, box-shadow 260ms ease-in-out, background-color 260ms ease-in-out;
}

.engineering-cause-button:hover {
  transform: translateY(-1px);
  border-color: rgba(197, 92, 43, 0.22);
  background: rgba(255, 250, 246, 0.92);
  box-shadow: 0 12px 26px rgba(31, 35, 48, 0.1);
}

.engineering-cause-button.is-active {
  border-color: rgba(197, 92, 43, 0.28);
  border-left: 4px solid rgba(197, 92, 43, 0.72);
  background: linear-gradient(180deg, rgba(255, 248, 243, 0.98), rgba(255, 252, 249, 0.92));
  box-shadow: 0 16px 30px rgba(31, 35, 48, 0.12);
  color: #1b2330;
}

.engineering-cause-button span {
  flex: 1;
}

.engineering-cause-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
}

.engineering-cause-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
}

.engineering-cause-type {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  background: rgba(28, 34, 48, 0.08);
  color: #536071;
  font-size: 0.74rem;
  font-weight: 700;
}

.engineering-impact-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}

.engineering-impact-high {
  background: rgba(181, 57, 45, 0.12);
  color: #8a281f;
}

.engineering-impact-medium {
  background: rgba(197, 92, 43, 0.12);
  color: var(--brand-dark);
}

.engineering-impact-low {
  background: rgba(28, 34, 48, 0.08);
  color: #536071;
}

.engineering-cause-explanation {
  margin-top: 14px;
  padding: 15px 16px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(244, 248, 252, 0.96), rgba(255, 255, 255, 0.84));
  border: 1px solid rgba(28, 34, 48, 0.1);
  box-shadow: 0 14px 30px rgba(31, 35, 48, 0.08);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 280ms ease-in-out, transform 280ms ease-in-out;
  position: relative;
}

.engineering-cause-explanation.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.engineering-cause-explanation::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 26px;
  width: 14px;
  height: 14px;
  background: rgba(247, 249, 251, 0.98);
  border-top: 1px solid rgba(28, 34, 48, 0.08);
  border-left: 1px solid rgba(28, 34, 48, 0.08);
  transform: rotate(45deg);
}

.engineering-cause-explanation strong {
  display: block;
  margin-bottom: 7px;
  position: relative;
  padding-left: 22px;
}

.engineering-cause-explanation strong::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 13px;
  height: 13px;
  border-radius: 999px;
  background:
    radial-gradient(circle at center, rgba(15, 123, 108, 0.92) 0 2px, transparent 2.5px),
    radial-gradient(circle at center, transparent 0 5px, rgba(15, 123, 108, 0.38) 5.5px 6.5px, transparent 7px);
}

.engineering-cause-explanation p {
  margin-bottom: 0;
  color: var(--muted);
}

.engineering-cause-hint {
  display: block;
  margin-top: 10px;
  color: #6d7889;
}

.engineering-cause-box-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: #5b6678;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.engineering-cause-box-label::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background:
    radial-gradient(circle at center, rgba(15, 123, 108, 0.9) 0 2px, transparent 2.5px),
    radial-gradient(circle at center, transparent 0 5px, rgba(15, 123, 108, 0.34) 5.5px 6.5px, transparent 7px);
}

.engineering-analysis-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(197, 148, 63, 0.22);
  background: linear-gradient(180deg, rgba(255, 246, 226, 0.95), rgba(255, 250, 239, 0.84));
}

.engineering-analysis-note strong {
  display: block;
  margin-bottom: 6px;
  color: #8b6520;
}

.engineering-analysis-note p {
  margin-bottom: 0;
  color: #6f6248;
}

.engineering-analysis-footer {
  margin-top: 18px;
}

.engineering-analysis-link {
  min-height: 44px;
}

.engineering-analysis-link span {
  display: inline-block;
  transition: transform 220ms ease;
}

.engineering-analysis-link:hover span {
  transform: translateX(3px);
}

.engineering-analysis-list[data-flow-solutions] {
  list-style: none;
  padding-left: 0;
  counter-reset: solution-step;
}

.engineering-analysis-list[data-flow-solutions] li {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-left: 42px;
  min-height: 34px;
}

.engineering-analysis-list[data-flow-solutions] li::before {
  counter-increment: solution-step;
  content: counter(solution-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(15, 123, 108, 0.14);
  color: #0d6b5e;
  font-size: 0.78rem;
  font-weight: 800;
}

.engineering-analysis-list[data-flow-solutions] li span {
  flex: 1;
}

.engineering-analysis-list[data-flow-solutions] li:first-child span {
  color: var(--text);
  font-weight: 800;
}

.engineering-solution-impact {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  background: rgba(15, 123, 108, 0.1);
  color: #0d6b5e;
  font-size: 0.72rem;
  font-weight: 800;
}

.engineering-flow-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
}

.engineering-flow-label::before {
  content: "";
  width: 14px;
  height: 14px;
  display: inline-block;
  flex-shrink: 0;
}

.engineering-flow-problem .engineering-flow-label {
  background: rgba(181, 57, 45, 0.16);
  color: #7d2119;
}

.engineering-flow-problem .engineering-flow-label::before {
  border-radius: 999px;
  background:
    radial-gradient(circle at center, currentColor 0 2px, transparent 2.5px),
    radial-gradient(circle at center, transparent 0 5px, currentColor 5.5px 6.5px, transparent 7px);
}

.engineering-flow-cause .engineering-flow-label {
  background: rgba(28, 34, 48, 0.08);
  color: #4e5868;
}

.engineering-flow-cause .engineering-flow-label::before {
  background:
    linear-gradient(currentColor, currentColor) center 2px / 2px 10px no-repeat,
    linear-gradient(currentColor, currentColor) center bottom / 2px 2px no-repeat;
  border-radius: 999px;
}

.engineering-flow-solution .engineering-flow-label {
  background: rgba(15, 123, 108, 0.14);
  color: #0d6b5e;
}

.engineering-flow-solution .engineering-flow-label::before {
  width: 15px;
  height: 15px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  border-radius: 1px;
}

.engineering-flow-connector {
  display: grid;
  place-items: center;
}

.engineering-flow-connector span {
  position: relative;
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(197, 92, 43, 0.12), rgba(15, 123, 108, 0.22));
}

.engineering-flow-connector span::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-top: 2px solid rgba(15, 123, 108, 0.45);
  border-right: 2px solid rgba(15, 123, 108, 0.45);
  transform: translateY(-50%) rotate(45deg);
}

.slider-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: 0;
  padding: 0;
  background: rgba(28, 34, 48, 0.2);
  cursor: pointer;
  transform: scale(1);
  transition: transform 320ms cubic-bezier(0.22, 1, 0.36, 1), background-color 320ms ease-in-out, box-shadow 320ms ease-in-out;
}

.slider-dot:hover {
  background: rgba(197, 92, 43, 0.38);
  transform: scale(1.08);
}

.slider-dot.is-active {
  background: var(--brand);
  transform: scale(1.34);
  box-shadow: 0 0 0 7px rgba(197, 92, 43, 0.1);
}
.split-panel { align-items: stretch; }
.split-panel > * { flex: 1; }
.quote-box { background: linear-gradient(135deg, rgba(197, 92, 43, 0.12), rgba(15, 123, 108, 0.08)); }
.table-wrap { overflow-x: auto; }

.tool-heading {
  align-items: flex-end;
  justify-content: space-between;
}

.tool-search-wrap {
  width: min(360px, 100%);
}

.search-field,
.select-field {
  display: grid;
  gap: 8px;
}

.search-field input,
.select-field select {
  width: 100%;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 0 16px;
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.filter-panel,
.preview-panel,
.problem-card,
.faq-item,
.category-card {
  backdrop-filter: blur(10px);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.category-grid {
  margin-top: 18px;
}

.category-card {
  position: relative;
  border-radius: 24px;
  padding: 22px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), border-color 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.category-card::before {
  content: "";
  position: absolute;
  inset: auto -20px -20px auto;
  width: 96px;
  height: 96px;
  border-radius: 999px;
  background: rgba(15, 123, 108, 0.06);
}

.category-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.category-card > * {
  position: relative;
  z-index: 1;
}

.category-card:hover {
  transform: translateY(-4px) scale(1.015);
  border-color: rgba(197, 92, 43, 0.2);
  box-shadow: 0 24px 52px rgba(31, 35, 48, 0.18);
}

.category-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: inline-grid;
  place-items: center;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.icon-stack {
  position: relative;
  display: block;
  width: 28px;
  height: 28px;
}

.icon-stack span {
  position: absolute;
  display: block;
}

.category-icon-injection {
  background: rgba(197, 92, 43, 0.12);
  color: var(--brand-dark);
}

.category-icon-material {
  background: rgba(15, 123, 108, 0.12);
  color: var(--accent);
}

.category-icon-mold {
  background: rgba(28, 34, 48, 0.08);
  color: var(--text);
}

.category-icon-dimensional {
  background: rgba(45, 92, 181, 0.12);
  color: #294f95;
}

.icon-injection-shape span:nth-child(1) {
  inset: 2px 4px 14px 4px;
  border-radius: 8px;
  border: 2px solid currentColor;
}

.icon-injection-shape span:nth-child(2) {
  width: 8px;
  height: 8px;
  right: 0;
  top: 10px;
  border-radius: 999px;
  background: currentColor;
}

.icon-injection-shape span:nth-child(3) {
  left: 6px;
  right: 6px;
  bottom: 3px;
  height: 2px;
  background: currentColor;
  opacity: 0.65;
}

.icon-material-shape span:nth-child(1),
.icon-material-shape span:nth-child(2),
.icon-material-shape span:nth-child(3) {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: currentColor;
}

.icon-material-shape span:nth-child(1) {
  left: 2px;
  bottom: 4px;
}

.icon-material-shape span:nth-child(2) {
  left: 10px;
  top: 8px;
}

.icon-material-shape span:nth-child(3) {
  right: 2px;
  bottom: 8px;
}

.icon-mold-shape span:nth-child(1),
.icon-mold-shape span:nth-child(2) {
  width: 11px;
  height: 18px;
  top: 5px;
  border: 2px solid currentColor;
  border-radius: 4px;
}

.icon-mold-shape span:nth-child(1) {
  left: 2px;
}

.icon-mold-shape span:nth-child(2) {
  right: 2px;
}

.icon-mold-shape span:nth-child(3) {
  left: 50%;
  top: 10px;
  width: 2px;
  height: 10px;
  transform: translateX(-50%);
  background: currentColor;
  opacity: 0.7;
}

.icon-dimensional-shape span:nth-child(1) {
  inset: 4px;
  border: 2px solid currentColor;
  border-radius: 7px;
}

.icon-dimensional-shape span:nth-child(2) {
  left: 8px;
  right: 8px;
  top: 13px;
  height: 2px;
  background: currentColor;
}

.icon-dimensional-shape span:nth-child(3) {
  top: 8px;
  bottom: 8px;
  left: 13px;
  width: 2px;
  background: currentColor;
}

.category-badge {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(28, 34, 48, 0.08);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.category-card h3 {
  font-size: 1.12rem;
  margin-bottom: 0;
}

.category-card p {
  color: var(--muted);
  margin-bottom: 0;
}

.category-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(197, 92, 43, 0.18);
  background: rgba(197, 92, 43, 0.08);
  color: var(--brand-dark);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  margin-top: auto;
}

.category-action:hover {
  background: rgba(197, 92, 43, 0.14);
}

.filter-panel {
  display: grid;
  gap: 18px;
  padding: 20px 22px;
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.78)),
    rgba(255, 255, 255, 0.72);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  border: 1px solid rgba(15, 123, 108, 0.16);
  background: rgba(15, 123, 108, 0.08);
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 12px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: 180ms ease;
}

.chip:hover,
.chip.is-active {
  background: rgba(197, 92, 43, 0.12);
  border-color: rgba(197, 92, 43, 0.2);
  color: var(--brand-dark);
}

.filter-actions {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.select-field span,
.result-count {
  color: var(--muted);
  font-size: 0.92rem;
}

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

.problem-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.9fr);
  gap: 20px;
  margin-top: 20px;
  align-items: start;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.problem-card {
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  border-radius: 24px;
  padding: 20px;
  cursor: pointer;
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), border-color 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms cubic-bezier(0.22, 1, 0.36, 1);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.82)),
    rgba(255, 255, 255, 0.82);
}

.problem-card:hover,
.problem-card.is-selected {
  transform: translateY(-3px) scale(1.012);
  border-color: rgba(197, 92, 43, 0.24);
  box-shadow: 0 18px 40px rgba(31, 35, 48, 0.14);
}

.info-card,
.material-card,
.post-card,
.contact-card {
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.info-card:hover,
.material-card:hover,
.post-card:hover,
.contact-card:hover {
  transform: translateY(-4px) scale(1.015);
  box-shadow: 0 26px 56px rgba(31, 35, 48, 0.18);
  border-color: rgba(197, 92, 43, 0.22);
}

.problem-card.is-selected {
  background:
    linear-gradient(180deg, rgba(255, 248, 243, 0.98), rgba(255, 252, 249, 0.88)),
    rgba(255, 255, 255, 0.88);
}

.problem-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.problem-meta,
.preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(28, 34, 48, 0.06);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
}

.severity-yuksek {
  background: rgba(181, 57, 45, 0.14);
  color: #8a281f;
  border: 1px solid rgba(138, 40, 31, 0.18);
}

.severity-orta {
  background: rgba(197, 92, 43, 0.14);
  color: var(--brand-dark);
  border: 1px solid rgba(139, 60, 24, 0.16);
}

.problem-card p:last-child,
.preview-panel p:last-child {
  margin-bottom: 0;
}

.preview-panel {
  position: sticky;
  top: 24px;
  border-radius: 28px;
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(250, 247, 242, 0.86)),
    rgba(255, 255, 255, 0.8);
}

.preview-panel ul {
  padding-left: 20px;
  margin: 0 0 1rem;
}

.preview-panel li {
  margin-bottom: 0.55rem;
  color: var(--muted);
}

.preview-placeholder {
  min-height: 320px;
  display: grid;
  align-content: center;
}

.preview-panel h3 + .preview-meta {
  margin-top: -2px;
}

.empty-state {
  padding: 24px;
  border-radius: 24px;
  border: 1px dashed rgba(28, 34, 48, 0.18);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.44);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border-radius: 20px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.76)),
    rgba(255, 255, 255, 0.78);
}

.faq-question {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 18px 20px;
  font: inherit;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  transition: background 180ms ease;
}

.faq-question:hover {
  background: rgba(197, 92, 43, 0.05);
}

.faq-question::after {
  content: "+";
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--brand);
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 180ms ease;
}

.faq-answer > * {
  overflow: hidden;
  padding: 0 20px;
  color: var(--muted);
}

.faq-answer.is-open {
  grid-template-rows: 1fr;
}

.faq-answer.is-open > * {
  padding-bottom: 18px;
}

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 10px; border-bottom: 1px solid var(--line); }
th { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }

.featured-post h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); }
.article-layout { max-width: 860px; margin: 0 auto; padding: 36px; border-radius: 32px; }
.article-layout section { margin-top: 28px; }
.article-layout ul { padding-left: 20px; color: var(--muted); }
.article-note { padding-top: 8px; border-top: 1px solid var(--line); }

.contact-layout { align-items: flex-start; }
.contact-layout > * { flex: 1; }

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.contact-form label { display: grid; gap: 8px; font-weight: 700; }
.contact-form label.full { grid-column: 1 / -1; }
.contact-form .button { grid-column: 1 / -1; justify-self: start; }

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.84);
}

.contact-aside { display: grid; gap: 16px; }
.form-feedback { grid-column: 1 / -1; margin: 0; color: var(--accent); font-weight: 700; }

.site-footer {
  margin-top: 28px;
  padding: 30px;
  border-radius: 32px;
  border: 1px solid rgba(60, 76, 98, 0.14);
  background:
    linear-gradient(180deg, rgba(49, 60, 76, 0.96), rgba(58, 71, 90, 0.98)),
    #384556;
  box-shadow: 0 22px 44px rgba(31, 35, 48, 0.14);
  color: rgba(241, 245, 249, 0.94);
}

.site-footer a {
  color: rgba(241, 245, 249, 0.88);
}

.site-footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) repeat(2, minmax(180px, 0.85fr));
  gap: 28px;
  align-items: start;
}

.site-footer-brand {
  display: grid;
  gap: 12px;
}

.site-footer-brand strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.18rem;
  line-height: 1.2;
}

.site-footer-brand p,
.site-footer-column p,
.site-footer-bottom {
  color: rgba(203, 213, 225, 0.82);
}

.site-footer-column {
  display: grid;
  gap: 12px;
}

.site-footer-title {
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}

.site-footer-links {
  display: grid;
  gap: 10px;
}

.site-footer-links a {
  width: fit-content;
  transition: color 180ms ease, transform 180ms ease;
}

.site-footer-links a:hover {
  color: #ffffff;
  transform: translateX(2px);
}

.site-footer-newsletter {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer-newsletter h3 {
  margin: 0;
  font-size: 1.08rem;
}

.site-footer-newsletter p {
  margin: 0;
  color: rgba(203, 213, 225, 0.8);
}

.site-footer-newsletter .newsletter-form {
  padding: 0;
  background: transparent;
  border: 0;
}

.site-footer-newsletter .newsletter-field input {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  color: #f8fafc;
}

.site-footer-newsletter .newsletter-field input::placeholder {
  color: rgba(226, 232, 240, 0.52);
}

.site-footer-newsletter .newsletter-field input:focus {
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.05);
}

.site-footer-newsletter .button {
  min-height: 44px;
  padding: 0 16px;
}

.site-footer-newsletter .newsletter-feedback {
  color: rgba(198, 255, 237, 0.92);
}

.site-footer-newsletter .newsletter-feedback.is-error {
  color: rgba(255, 214, 214, 0.94);
}

.site-footer-bottom {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .hero,
  .four-up,
  .three-up,
  .two-up,
  .contact-layout {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .hero { padding: 28px; }
  .hero-with-art::before {
    background-image:
      linear-gradient(180deg, rgba(255, 253, 250, 0.84) 0%, rgba(255, 253, 250, 0.68) 100%),
      url("../hero-polymers.png");
    background-position: center center, center bottom;
    background-size: cover, 88%;
    opacity: 0.7;
  }
  .site-header, .site-footer { border-radius: 28px; }
  .contact-form { grid-template-columns: 1fr; }
  .four-up,
  .three-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .two-up { grid-template-columns: 1fr; }
  .problem-layout,
  .tool-heading,
  .filter-actions { grid-template-columns: 1fr; flex-direction: column; align-items: stretch; }
  .problem-grid { grid-template-columns: 1fr 1fr; }
  .preview-panel { position: static; }
  .tool-search-wrap { width: 100%; }
  .thermoplastic-slider-viewport { min-height: 670px; }
  .classification-guide-frame { aspect-ratio: 16 / 8.4; }
  .thermoplastic-visual-grid.three-up,
  .thermoplastic-visual-grid.four-up,
  .thermoplastic-balance-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-discovery-grid {
    grid-template-columns: 1fr;
  }
  .about-image-band,
  .about-image-track,
  .about-image-placeholder,
  .about-image-frame img { min-height: 100%; }
  .about-hero {
    min-height: 560px;
  }
  .about-hero-copy {
    width: 100%;
    padding: 30px 28px 26px;
  }
  .engineering-flow-layout {
    grid-template-columns: 1fr;
  }
  .engineering-preview-panel {
    position: static;
  }
  .engineering-flow-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .engineering-preview-flow {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .engineering-flow-connector {
    min-height: 26px;
  }
  .engineering-flow-connector span {
    width: 2px;
    height: 100%;
    min-height: 26px;
    background: linear-gradient(180deg, rgba(197, 92, 43, 0.12), rgba(15, 123, 108, 0.22));
  }
  .engineering-flow-connector span::after {
    right: 50%;
    top: auto;
    bottom: -1px;
    transform: translateX(50%) rotate(135deg);
  }

  .newsletter-card {
    grid-template-columns: 1fr;
  }

  .site-footer-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .section,
  .page-main {
    margin-top: 24px;
  }

  .site-header {
    align-items: flex-start;
    border-radius: 28px;
    flex-wrap: wrap;
  }

  .nav-toggle { display: inline-flex; margin-left: auto; }
  .brand-logo { width: 56px; height: 56px; }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-top: 8px;
  }

  .site-nav.is-open { display: flex; }
  .site-nav a { background: rgba(255, 255, 255, 0.6); }
  .nav-dropdown {
    width: 100%;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
  }
  .nav-parent-link { min-width: 0; }
  .nav-submenu-toggle { display: inline-flex; }
  .nav-submenu {
    position: static;
    min-width: 0;
    padding: 8px 0 0;
    border: 0;
    box-shadow: none;
    background: transparent;
    backdrop-filter: none;
    opacity: 0;
    pointer-events: none;
    transform: none;
    grid-column: 1 / -1;
    display: none;
  }
  .nav-dropdown:hover .nav-submenu,
  .nav-dropdown:focus-within .nav-submenu {
    opacity: 0;
    pointer-events: none;
  }
  .nav-dropdown.is-open .nav-submenu,
  .nav-dropdown.is-active .nav-submenu {
    display: grid;
    opacity: 1;
    pointer-events: auto;
  }
  .nav-submenu a {
    background: rgba(255, 255, 255, 0.6);
  }
  .site-shell { width: min(100% - 20px, 1180px); }
  .four-up,
  .three-up,
  .two-up { grid-template-columns: 1fr; }
  .contact-form .button { width: 100%; justify-self: stretch; }
  .section-heading h2,
  .page-hero h1 { max-width: none; }
  .section-heading {
    gap: 8px;
    margin-bottom: 18px;
  }
  .problem-grid { grid-template-columns: 1fr; }
  .filter-panel,
  .preview-panel,
  .problem-card,
  .faq-item,
  .category-card { border-radius: 20px; }

  .hero,
  .page-hero,
  .thermoplastic-slider-shell,
  .engineering-flow-shell,
  .article-layout,
  .metric-card,
  .info-card,
  .route-card,
  .material-card,
  .post-card,
  .contact-card,
  .quote-box,
  .table-wrap,
  .contact-form { padding: 20px; border-radius: 24px; }
  .thermoplastic-slider-viewport { min-height: 960px; }
  .thermoplastic-slider-controls { flex-direction: column; align-items: stretch; }
  .thermoplastic-visual-grid.three-up,
  .thermoplastic-visual-grid.four-up,
  .thermoplastic-balance-grid { grid-template-columns: 1fr; }
  .thermoplastic-slider-heading h2 { white-space: normal; }
  .classification-guide-shell { padding: 10px; border-radius: 24px; }
  .classification-guide-frame { aspect-ratio: 16 / 10.2; border-radius: 18px; }
  .classification-map-shell { padding: 20px; border-radius: 24px; }
  .polimer-grid,
  .footer-section { grid-template-columns: 1fr; }
  .classification-map-heading {
    margin-bottom: 16px;
  }
  .sub-grid { flex-direction: column; }
  .icon-placeholder { height: auto; min-height: 48px; }
  .basic-structure-note {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .material-guidance-note {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .engineering-preview-inner,
  .engineering-flow-shell { padding: 20px; border-radius: 24px; }
  .engineering-analysis-causes li {
    align-items: flex-start;
    flex-direction: column;
  }
  .engineering-cause-button {
    align-items: flex-start;
    flex-direction: column;
  }
  .engineering-analysis-list[data-flow-solutions] li {
    align-items: flex-start;
    flex-direction: column;
  }
  .about-image-band,
  .about-image-track,
  .about-image-placeholder,
  .about-image-frame img { min-height: 100%; }
  .about-hero {
    min-height: 500px;
  }
  .about-hero-copy {
    padding: 24px 20px 22px;
    gap: 14px;
    border-radius: 22px;
  }
  .about-discovery-shell {
    padding: 22px 16px;
    border-radius: 22px;
  }
  .about-discovery-card {
    padding: 18px 16px 17px;
    border-radius: 20px;
  }
  .about-discovery-card h3 {
    font-size: 1.14rem;
  }
  .about-discovery-card p {
    font-size: 0.98rem;
    line-height: 1.6;
  }
  .about-hero-text {
    gap: 12px;
  }
  .about-hero-text p {
    font-size: 0.98rem;
    line-height: 1.6;
  }
  .about-signature { font-size: 1.08rem; }

  .newsletter-card {
    padding: 22px 20px;
    border-radius: 24px;
  }

  .newsletter-form {
    padding: 16px;
    border-radius: 18px;
  }

  .newsletter-form .button {
    width: 100%;
  }

  .site-footer {
    padding: 22px 20px;
    border-radius: 24px;
  }

  .site-footer-main {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .site-footer-newsletter {
    padding: 16px;
    border-radius: 18px;
  }

  .site-footer-newsletter .button {
    width: 100%;
  }

.site-footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

.whatsapp-float {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  width: 58px;
  height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #25D366;
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(17, 24, 39, 0.2);
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.whatsapp-float:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(17, 24, 39, 0.24);
  background: #22c55e;
}

.whatsapp-float-icon {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.whatsapp-float-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.whatsapp-float-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(18, 24, 34, 0.94);
  color: rgba(255, 255, 255, 0.94);
  font-size: 0.84rem;
  font-weight: 700;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.whatsapp-float:hover .whatsapp-float-tooltip,
.whatsapp-float:focus-visible .whatsapp-float-tooltip {
  opacity: 1;
  transform: translateY(-50%) translateX(-2px);
}

@media (max-width: 760px) {
  .whatsapp-float {
    right: 16px;
    bottom: 16px;
    width: 62px;
    height: 62px;
  }

  .whatsapp-float-icon {
    width: 30px;
    height: 30px;
  }

  .whatsapp-float-tooltip {
    display: none;
  }
}

body.has-welcome-dialog {
  overflow: hidden;
}

.welcome-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(25, 33, 45, 0.42);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: welcomeFadeIn 180ms ease;
}

.welcome-overlay.is-closing {
  opacity: 0;
}

.welcome-dialog {
  position: relative;
  width: min(640px, 100%);
  padding: 30px;
  border-radius: 28px;
  border: 1px solid rgba(28, 34, 48, 0.08);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 249, 252, 0.92)),
    var(--surface);
  box-shadow: 0 28px 60px rgba(18, 24, 34, 0.18);
  animation: welcomeDialogIn 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.welcome-dialog h2 {
  margin-bottom: 12px;
  max-width: 14ch;
  font-size: clamp(2rem, 4vw, 3rem);
}

.welcome-dialog p {
  margin-bottom: 0;
  color: var(--muted);
}

.welcome-note {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(28, 34, 48, 0.08);
  color: #415064;
  font-weight: 600;
}

.welcome-actions {
  margin-top: 22px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.welcome-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  background: rgba(28, 34, 48, 0.06);
  color: #445164;
  font: inherit;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color 180ms ease, transform 180ms ease;
}

.welcome-close:hover {
  background: rgba(28, 34, 48, 0.1);
  transform: translateY(-1px);
}

@keyframes welcomeFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes welcomeDialogIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 760px) {
  .welcome-overlay {
    padding: 16px;
  }

  .welcome-dialog {
    padding: 24px 20px 20px;
    border-radius: 24px;
  }

  .welcome-dialog h2 {
    max-width: none;
    font-size: clamp(1.7rem, 8vw, 2.3rem);
  }

  .welcome-actions {
    margin-top: 18px;
  }

  .welcome-actions .button {
    width: 100%;
  }
}