/*
 * UWIN OIL — light / air concept.
 * This layer deliberately keeps the semantic structure and technical diagrams
 * from the dark industrial concept while giving the page a separate visual voice.
 */

:root {
  --navy-950: #173947;
  --navy-900: #214a5c;
  --navy-850: #2a596b;
  --navy-800: #335f70;
  --blue-700: #326d83;
  --cyan-500: #69cad4;
  --cyan-300: #a9e7ea;
  --cyan-100: #e6f7f8;
  --oil-500: #e9a642;
  --oil-200: #fae6bf;
  --ink: #294554;
  --muted: #66808e;
  --line: #cddbe3;
  --surface: #eaf2f9;
  --white: #ffffff;
  --orange: #ff5a00;
  --orange-dark: #dc5005;
  --ice: #dce5ed;
  --shadow: 0 24px 70px rgba(41, 69, 84, .11);
  --radius-lg: 38px;
  --radius-md: 26px;
  --radius-sm: 16px;
  --container: 1320px;
}

body {
  color: var(--ink);
  background: var(--surface);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
}

h1,
h2,
h3 {
  letter-spacing: -.045em;
}

h2 {
  font-size: clamp(42px, 5.25vw, 72px);
  font-weight: 620;
}

.container {
  width: min(calc(100% - 56px), var(--container));
}

.section {
  padding: clamp(120px, 12vw, 184px) 0;
}

.eyebrow,
.eyebrow-light {
  color: #4c6877;
  font-size: 11px;
  letter-spacing: .15em;
}

.eyebrow > span {
  width: 26px;
  background: var(--orange);
}

.button {
  min-height: 57px;
  padding: 15px 25px;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: -.01em;
}

.button-primary {
  color: #fff;
  background: var(--orange);
  box-shadow: none;
}

.button-primary:hover {
  color: #fff;
  background: var(--orange-dark);
  box-shadow: 0 16px 36px rgba(220, 80, 5, .2);
}

.button-dark {
  color: #fff;
  background: var(--ink);
}

.button-dark:hover {
  background: #173947;
}

.button-ghost {
  color: var(--ink);
  border-color: rgba(41, 69, 84, .28);
}

.button-ghost:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, .55);
  border-color: rgba(41, 69, 84, .42);
}

.site-header {
  top: 14px;
  width: min(calc(100% - 32px), 1380px);
  margin-inline: auto;
  color: var(--ink);
  background: rgba(247, 251, 253, .88);
  border: 1px solid rgba(118, 142, 156, .22);
  border-radius: 999px;
  box-shadow: 0 8px 30px rgba(41, 69, 84, .05);
  backdrop-filter: blur(18px);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, .94);
  border-color: rgba(118, 142, 156, .28);
  box-shadow: 0 12px 34px rgba(41, 69, 84, .1);
}

.header-inner {
  min-height: 70px;
}

.brand,
.site-nav a {
  color: var(--ink);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(41, 69, 84, .14);
  box-shadow: none;
}

.brand-copy strong {
  font-size: 19px;
}

.brand-copy small {
  color: #768e9c;
}

.site-nav {
  gap: clamp(18px, 2.4vw, 34px);
}

.site-nav a {
  color: #4f6572;
  font-size: 13px;
}

.site-nav a:hover {
  color: var(--orange-dark);
}

.site-nav a::after {
  background: var(--orange);
}

.button-header {
  min-height: 42px;
  padding: 10px 18px;
  color: #fff;
  background: var(--ink);
  border-color: var(--ink);
}

/* Hero: a single calm editorial field rather than a heavy dark cover. */
.hero {
  min-height: auto;
  padding: 118px 0 30px;
  color: var(--ink);
  background: var(--surface);
}

.hero::before,
.hero-grid-lines,
.hero-orbit {
  display: none;
}

.hero-layout {
  position: relative;
  min-height: 780px;
  align-items: stretch;
  padding: clamp(38px, 5vw, 68px);
  overflow: hidden;
  background: var(--ice);
  border: 1px solid rgba(118, 142, 156, .16);
  border-radius: 42px;
  grid-template-columns: minmax(0, 1.16fr) minmax(400px, .84fr);
  gap: clamp(30px, 4.2vw, 62px);
}

.hero-layout::before {
  position: absolute;
  width: 520px;
  height: 520px;
  right: -190px;
  bottom: -220px;
  background: rgba(255, 255, 255, .34);
  border-radius: 50%;
  content: "";
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding-top: 14px;
}

.hero-copy h1 {
  max-width: 760px;
  margin-bottom: 30px;
  color: var(--ink);
  font-size: clamp(50px, 5vw, 72px);
  font-weight: 590;
  line-height: .99;
}

.hero-copy h1 em {
  color: var(--orange);
  font-style: normal;
}

.hero-lead {
  max-width: 690px;
  color: #4c6877;
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.52;
}

.hero-actions {
  margin-bottom: 44px;
}

.hero-proof {
  margin-top: auto;
  border-top-color: rgba(41, 69, 84, .18);
}

.hero-proof > div {
  padding-top: 18px;
  border-right-color: rgba(41, 69, 84, .14);
}

.hero-proof strong {
  color: var(--ink);
  font-size: 22px;
  font-weight: 650;
}

.hero-proof span {
  color: #66808e;
}

.hero-visual {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.machine-frame {
  height: 100%;
  min-height: 640px;
  padding: 0;
  overflow: hidden;
  background: #f8fbfc;
  border: 0;
  border-radius: 31px;
  box-shadow: 0 25px 70px rgba(41, 69, 84, .12);
}

.machine-frame::after {
  background: linear-gradient(180deg, transparent 58%, rgba(23, 57, 71, .26));
}

.machine-frame img {
  height: 100%;
  min-height: 640px;
  object-fit: cover;
  object-position: 54% center;
  filter: saturate(.86) contrast(.97);
}

.machine-status {
  top: 20px;
  left: 20px;
  color: var(--ink);
  background: rgba(255, 255, 255, .9);
  border-color: rgba(41, 69, 84, .14);
  box-shadow: 0 8px 24px rgba(41, 69, 84, .1);
}

.machine-status span {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 90, 0, .12);
}

.machine-note {
  color: #fff;
  background: rgba(41, 69, 84, .86);
  border-color: rgba(255, 255, 255, .2);
}

.machine-note small {
  color: #dce5ed;
}

.hero-footnote {
  position: static;
  padding: 14px 8px 0;
  color: #768e9c;
}

.section-heading {
  max-width: 1080px;
  margin-bottom: clamp(58px, 7vw, 94px);
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 18px;
}

.split-heading {
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(40px, 8vw, 112px);
}

/* Outcomes: two clean editorial cards with generous breathing room. */
.section-intro {
  background: var(--surface);
}

.outcome-grid {
  gap: 22px;
}

.outcome-card {
  min-height: 730px;
  padding: clamp(28px, 4vw, 52px);
  background: rgba(255, 255, 255, .78);
  border: 1px solid rgba(118, 142, 156, .2);
  border-radius: 34px;
  box-shadow: none;
}

.card-index {
  color: #768e9c;
}

.outcome-graphic {
  height: 250px;
  margin: 24px 0 46px;
  border-radius: 25px;
}

.outcome-card h3 {
  font-size: clamp(29px, 2.7vw, 40px);
  font-weight: 610;
}

.outcome-card > p:not(.card-kicker) {
  color: #66808e;
}

.card-kicker,
.check-list li::before {
  color: var(--ink);
}

.card-kicker {
  color: var(--orange-dark);
}

.check-list li {
  color: #405d6c;
}

.check-list li::before {
  background: var(--oil-200);
}

.statement {
  margin-top: 22px;
  padding: clamp(34px, 5vw, 66px);
  background: var(--ink);
  border: 0;
  border-radius: 34px;
}

.statement span {
  color: var(--oil-500);
}

.statement p {
  color: #dce5ed;
}

.statement strong {
  color: #fff;
}

/* Comparison is one dark technical island, not an entire dark page. */
.comparison {
  padding-top: 70px;
  padding-bottom: 70px;
  background: var(--surface);
}

.comparison > .container {
  padding: clamp(34px, 5vw, 72px);
  color: #fff;
  background: var(--ink);
  border-radius: 42px;
}

.section-heading-dark h2 {
  color: #fff;
}

.section-heading-dark > p:last-child {
  color: #b6c7d0;
}

.comparison .eyebrow-light {
  color: #b6c7d0;
}

.compare-visuals {
  margin-bottom: 22px;
  background: rgba(255, 255, 255, .035);
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 28px;
}

.versus {
  color: var(--ink);
  background: var(--oil-500);
  box-shadow: 0 0 0 12px rgba(233, 166, 66, .09);
}

.comparison-table-wrap {
  border-color: rgba(255, 255, 255, .13);
  border-radius: 26px;
}

.comparison-table td:nth-child(3) {
  background: rgba(105, 202, 212, .055);
}

.compare-cta {
  background: rgba(255, 255, 255, .06);
  border-radius: 20px;
}

/* Scientific explanation: bright copy beside a precise dark diagram. */
.mass-transfer {
  background: #f8fbfc;
}

.mass-layout {
  gap: clamp(60px, 8vw, 118px);
}

.mass-copy h2 {
  font-size: clamp(44px, 5vw, 68px);
  font-weight: 610;
}

.process-list li {
  padding: 24px 0;
  border-color: #dce5ed;
}

.process-list li > span {
  color: var(--orange-dark);
}

.mass-diagram {
  background: #214a5c;
  border: 0;
  border-radius: 34px;
  box-shadow: 0 28px 70px rgba(41, 69, 84, .16);
}

.diagram-head,
.diagram-result {
  background: #173947;
}

.diagram-result strong {
  background: var(--oil-500);
}

/* Application route: a wide, calm card with a strict six-column rhythm. */
.lifecycle {
  background: var(--surface);
}

.lifecycle .section-heading {
  margin-bottom: 70px;
}

.route {
  padding: 34px 16px 40px;
  background: rgba(255, 255, 255, .75);
  border: 1px solid rgba(118, 142, 156, .18);
  border-radius: 34px;
}

.route-line {
  top: 87px;
  right: 8%;
  left: 8%;
  background: #cbd8df;
}

.route-line span {
  background: var(--orange);
}

.route-num {
  margin-top: 40px;
  color: var(--ink);
  background: #f8fbfc;
  border-color: #c5d4dc;
}

.route article:nth-child(-n+4) .route-num {
  color: #fff;
  background: var(--orange);
  border-color: var(--orange);
}

.route-icon {
  background: #f8fbfc;
  border-color: #d7e2e8;
  box-shadow: none;
}

.route h3 {
  font-size: 17px;
}

.application-strip {
  margin-top: 28px;
  padding-top: 0;
  border: 0;
}

.application-strip span {
  color: #4c6877;
  background: rgba(255, 255, 255, .62);
  border-color: #d7e2e8;
}

/* Equipment becomes a full editorial image panel. */
.equipment {
  background: #f8fbfc;
}

.equipment-layout {
  align-items: stretch;
  grid-template-columns: 1.08fr .92fr;
  gap: 22px;
}

.equipment-image {
  min-height: 720px;
  padding: 0;
  background: #fff;
  border: 0;
  border-radius: 36px;
  box-shadow: none;
}

.equipment-image img {
  height: 100%;
  aspect-ratio: auto;
  object-position: 54% center;
  border-radius: 36px;
}

.image-caption {
  right: 26px;
  bottom: 26px;
  color: var(--ink);
  background: rgba(255, 255, 255, .9);
  border-color: rgba(41, 69, 84, .16);
}

.image-caption span {
  color: #66808e;
}

.equipment-copy {
  display: flex;
  flex-direction: column;
  padding: clamp(38px, 5vw, 66px);
  background: var(--surface);
  border: 1px solid rgba(118, 142, 156, .16);
  border-radius: 36px;
}

.equipment-copy h2 {
  font-size: clamp(42px, 4.6vw, 64px);
  font-weight: 610;
}

.feature-grid {
  margin-top: auto;
  border-color: #cddbe3;
}

.feature-grid > div {
  border-color: #cddbe3;
}

.feature-grid span {
  color: var(--orange-dark);
}

/* Economics: pale orange/blue cards instead of a heavy dark belt. */
.economics {
  padding: 92px 0 50px;
  color: var(--ink);
  background: var(--surface);
}

.economics-grid {
  gap: 16px;
}

.economics-title {
  padding: 38px 44px;
  background: #dce5ed;
  border-radius: 30px;
}

.economics-title h2 {
  font-size: clamp(36px, 3.9vw, 52px);
}

.economics-title > p:last-child {
  color: #58717f;
}

.metric-card {
  min-height: 310px;
  color: var(--ink);
  background: rgba(255, 255, 255, .76);
  border-color: rgba(118, 142, 156, .18);
  border-radius: 28px;
}

.metric-card small,
.metric-card span {
  color: #66808e;
}

.metric-card strong {
  color: var(--ink);
}

.metric-card:nth-of-type(2) {
  background: #f6e8d2;
}

.metric-card-accent {
  color: #fff;
  background: var(--orange);
  border-color: var(--orange);
}

.metric-card-accent small,
.metric-card-accent span,
.metric-card-accent strong {
  color: #fff;
}

.economics-note {
  color: #768e9c;
}

/* Process and test: strict modularity, no decorative tilting. */
.project-process {
  background: var(--surface);
}

.steps {
  gap: 12px;
  overflow: visible;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.steps article {
  min-height: 260px;
  padding: 32px;
  background: rgba(255, 255, 255, .74);
  border: 1px solid rgba(118, 142, 156, .18) !important;
  border-radius: 26px;
}

.steps span {
  color: var(--orange-dark);
}

.steps h3 {
  margin-top: 60px;
  font-size: 23px;
}

.test-section {
  padding-top: 54px;
  background: #f8fbfc;
}

.test-layout {
  gap: 22px;
}

.test-photo {
  min-height: 720px;
  border-radius: 36px;
}

.test-copy {
  padding: clamp(42px, 5vw, 70px);
  background: var(--surface);
  border: 1px solid rgba(118, 142, 156, .16);
  border-radius: 36px;
}

.test-copy h2 {
  font-size: clamp(40px, 4.3vw, 58px);
  font-weight: 610;
}

.test-list span {
  color: var(--orange-dark);
}

/* Service returns to the light world; the final CTA carries the strong contrast. */
.service {
  color: var(--ink);
  background: var(--surface);
}

.service .section-heading-dark h2 {
  color: var(--ink);
}

.service .section-heading-dark > p:last-child,
.service .eyebrow-light {
  color: var(--muted);
}

.service-grid {
  gap: 12px;
  border: 0;
}

.service-grid article {
  min-height: 270px;
  padding: 30px;
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(118, 142, 156, .18);
  border-radius: 26px;
}

.service-grid article:hover {
  background: #fff;
}

.service-grid article::after {
  border-color: rgba(255, 90, 0, .14);
}

.service-grid span {
  color: var(--orange-dark);
}

.service-grid h3 {
  color: var(--ink);
}

.service-grid p {
  color: #66808e;
}

.service-footer {
  color: #fff;
  background: var(--ink);
  border-radius: 24px;
}

.final-cta {
  width: min(calc(100% - 28px), 1460px);
  margin: 0 auto 14px;
  padding: clamp(80px, 8vw, 120px) 0;
  color: #fff;
  background: var(--ink);
  border-radius: 42px;
}

.final-grid {
  display: block;
  opacity: .08;
}

.final-layout h2 {
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 580;
}

.final-layout p {
  color: #bfd0d8;
}

.final-action span {
  color: #93aab5;
}

.site-footer {
  padding-top: 72px;
  color: #66808e;
  background: var(--surface);
  border-top: 0;
}

.brand-footer,
.footer-contact > a {
  color: var(--ink);
}

.footer-grid > div:first-child > p,
.footer-grid nav a {
  color: #66808e;
}

.footer-grid nav a:hover,
.footer-contact button {
  color: var(--orange-dark);
}

.footer-contact span,
.footer-bottom {
  color: #768e9c;
}

.footer-bottom {
  border-top-color: #cddbe3;
}

.request-dialog {
  border-radius: 30px;
  box-shadow: 0 30px 100px rgba(41, 69, 84, .24);
}

.request-dialog::backdrop {
  background: rgba(23, 57, 71, .7);
}

.dialog-head {
  background: var(--surface);
}

.request-form input:focus,
.request-form textarea:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 90, 0, .12);
}

.form-status {
  color: var(--ink);
  background: #f6e8d2;
}

@media (max-width: 1180px) {
  .site-nav {
    gap: 18px;
  }

  .hero-layout {
    min-height: 720px;
    grid-template-columns: minmax(0, 1fr) minmax(370px, .82fr);
  }

  .hero-copy h1 {
    font-size: clamp(48px, 6vw, 69px);
  }

  .machine-frame,
  .machine-frame img {
    min-height: 580px;
  }

  .route {
    grid-template-columns: repeat(3, 1fr);
    row-gap: 48px;
  }

  .route-line {
    display: none;
  }

  .route-num {
    margin-top: 10px;
  }

  .economics-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .economics-title {
    grid-column: 1 / -1;
  }
}

@media (max-width: 980px) {
  .site-header {
    top: 8px;
    width: calc(100% - 16px);
  }

  .header-inner {
    min-height: 64px;
  }

  .menu-toggle span {
    background: var(--ink);
  }

  .menu-toggle {
    background: rgba(41, 69, 84, .06);
    border-color: rgba(41, 69, 84, .16);
    border-radius: 50%;
  }

  .menu-toggle span:not(.sr-only) {
    background: var(--ink);
  }

  .site-nav {
    top: 72px;
    color: var(--ink);
    background: rgba(255, 255, 255, .97);
    border: 1px solid #d7e2e8;
    border-radius: 24px;
    box-shadow: var(--shadow);
  }

  .site-nav a {
    color: var(--ink);
    border-bottom-color: #e3ebef;
  }

  .hero-layout {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    min-height: 620px;
  }

  .machine-frame,
  .machine-frame img {
    min-height: 620px;
  }

  .mass-layout,
  .equipment-layout,
  .test-layout,
  .final-layout {
    grid-template-columns: 1fr;
  }

  .equipment-image,
  .test-photo {
    min-height: 620px;
  }

  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .final-layout {
    gap: 46px;
  }
}

@media (max-width: 740px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .section {
    padding: 92px 0;
  }

  .hero {
    padding-top: 88px;
  }

  .hero-layout {
    padding: 28px 20px 20px;
    border-radius: 28px;
  }

  .hero-copy {
    min-height: 680px;
  }

  .hero-copy h1 {
    overflow-wrap: normal;
    word-break: normal;
    font-size: clamp(36px, 9.7vw, 48px);
  }

  .hero-lead {
    font-size: 16px;
  }

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

  .hero-proof > div {
    padding: 14px 0;
    border-right: 0;
    border-bottom: 1px solid rgba(41, 69, 84, .12);
  }

  .machine-frame,
  .machine-frame img {
    min-height: 500px;
  }

  .machine-note-top {
    top: auto;
    right: 14px;
    bottom: 84px;
  }

  .machine-note-bottom {
    right: 14px;
    bottom: 18px;
  }

  .split-heading,
  .outcome-grid,
  .route,
  .steps,
  .economics-grid,
  .service-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .outcome-card {
    min-height: 0;
  }

  .comparison {
    padding-block: 28px;
  }

  .comparison > .container {
    width: calc(100% - 16px);
    padding: 72px 18px 28px;
    border-radius: 28px;
  }

  .compare-visuals {
    border-radius: 22px;
  }

  .mass-diagram,
  .equipment-image,
  .equipment-copy,
  .test-photo,
  .test-copy {
    border-radius: 27px;
  }

  .equipment-image,
  .test-photo {
    min-height: 500px;
  }

  .economics-title,
  .metric-card {
    border-radius: 25px;
  }

  .metric-card {
    min-height: 240px;
  }

  .service-footer,
  .final-layout,
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .final-cta {
    width: calc(100% - 12px);
    border-radius: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button,
  .outcome-card,
  .service-grid article {
    transition: none;
  }
}