/* ============================================================
   FUELMEX LTD — shared stylesheet
   Design language: technical / pipeline schematic.
   Palette pulled from the company mark (hard-hat amber + gear
   charcoal) plus a warm steel-plate cream for paper-like pages.
   ============================================================ */

:root {
  --charcoal: #24262a;
  --gunmetal: #4a4d52;
  --amber: #e3a038;
  --amber-deep: #b5651d;
  --cream: #f3efe6;
  --paper: #faf8f3;
  --line: #d8d2c4;
  --line-dark: #3a3d42;
  --ok-green: #4c7a52;

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Work Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --radius: 2px;
  --max-w: 1120px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--charcoal);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--amber-deep);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- background schematic texture ---------- */
.blueprint-grid {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
  opacity: 0.35;
}

/* ---------- site header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--charcoal);
  color: var(--paper);
  border-bottom: 3px solid var(--amber);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--paper);
}

.brand__mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand__name { font-size: 1.15rem; text-transform: uppercase; }
.brand__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--amber);
  text-transform: uppercase;
  font-weight: 400;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--gunmetal);
  color: var(--paper);
  width: 42px;
  height: 42px;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background: var(--paper);
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav a {
  text-decoration: none;
  color: var(--paper);
  opacity: 0.8;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  opacity: 1;
  border-bottom-color: var(--amber);
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--charcoal);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .site-nav.is-open { max-height: 320px; }
  .site-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 28px 20px;
  }
  .site-nav li { border-top: 1px solid var(--line-dark); }
  .site-nav a { display: block; padding: 14px 0; }
}

/* ---------- pipeline rail — the signature device ----------
   A running horizontal line with numbered node markers that
   thread through each section, echoing a fuel-line schematic. */
.pipeline {
  position: relative;
  height: 34px;
  margin: 0 0 -1px;
}
.pipeline::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 3px;
  background: repeating-linear-gradient(
    90deg, var(--gunmetal) 0 14px, transparent 14px 22px
  );
  transform: translateY(-50%);
}
.pipeline__node {
  position: absolute;
  top: 50%;
  left: 28px;
  transform: translate(-50%, -50%);
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--amber);
  border: 3px solid var(--charcoal);
}

/* ---------- section scaffolding ---------- */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.section--dark {
  background: var(--charcoal);
  color: var(--paper);
  border-bottom-color: var(--line-dark);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin: 0 0 14px;
}
.section--dark .eyebrow { color: var(--amber); }
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.section h2 {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  margin: 0 0 18px;
}

.section__lede {
  max-width: 62ch;
  font-size: 1.05rem;
  color: var(--gunmetal);
  margin: 0 0 40px;
}
.section--dark .section__lede { color: #c9c9cc; }

/* ---------- about us ---------- */
.about-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-copy p {
  margin: 0 0 18px;
  color: var(--gunmetal);
  font-size: 1.02rem;
  max-width: 58ch;
}
.about-copy p:last-child { margin-bottom: 0; }

.about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.about-fact {
  background: var(--paper);
  padding: 20px 18px;
}
.about-fact__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.01em;
  color: var(--charcoal);
}
.about-fact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-top: 6px;
}

.core-value {
  margin: 32px 0 0;
  border-left: 3px solid var(--amber);
  background: var(--paper);
  padding: 20px 24px;
}
.core-value__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 8px;
}
.core-value p {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--charcoal);
  letter-spacing: 0.01em;
}

@media (max-width: 820px) {
  .about-layout { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .about-facts { grid-template-columns: 1fr; }
}

/* ---------- mission / vision ---------- */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.mv-card {
  background: var(--paper);
  padding: 40px 36px;
  position: relative;
}
.mv-card__gauge {
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
}
.mv-card h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 1.4rem;
  margin: 0 0 12px;
}
.mv-card p {
  margin: 0;
  color: var(--gunmetal);
  font-size: 1.02rem;
}
.mv-card__code {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--line);
  letter-spacing: 0.06em;
}

@media (max-width: 680px) {
  .mv-grid { grid-template-columns: 1fr; }
}

/* ---------- why choose us ---------- */
.reasons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.reason {
  border-left: 3px solid var(--amber);
  padding-left: 20px;
}
.reason__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--amber-deep);
  margin-bottom: 8px;
}
.reason h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  margin: 0 0 8px;
}
.reason p { margin: 0; color: var(--gunmetal); font-size: 0.98rem; }

@media (max-width: 680px) {
  .reasons { grid-template-columns: 1fr; }
}

/* ---------- skills / services ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.skill-card {
  background: var(--paper);
  padding: 28px 24px;
}
.skill-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}
.skill-card h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  margin: 0;
}
.skill-card__code {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--amber-deep);
}
.skill-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.92rem;
  color: var(--gunmetal);
}
.skill-card li {
  padding: 5px 0;
  border-top: 1px dashed var(--line);
}
.skill-card li:first-child { border-top: none; }

@media (max-width: 900px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
}

/* ---------- footer ---------- */
.site-footer {
  background: var(--charcoal);
  color: #b9bbc0;
  padding: 40px 0 28px;
  font-size: 0.88rem;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: space-between;
  align-items: center;
}
.site-footer a { color: var(--amber); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ---------- privacy policy page ---------- */
.policy-shell {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px 28px 90px;
}
.policy-shell h1 {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin: 0 0 6px;
}
.policy-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--gunmetal);
  margin: 0 0 40px;
}
.policy-toc {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 20px 24px;
  margin-bottom: 44px;
}
.policy-toc p {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin: 0 0 10px;
}
.policy-toc ol {
  columns: 2;
  margin: 0;
  padding-left: 18px;
  font-size: 0.92rem;
}
.policy-toc a { text-decoration: none; }
.policy-toc a:hover { text-decoration: underline; }

.policy-section {
  padding: 30px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}
.policy-section:first-of-type { border-top: none; }
.policy-section h2 {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.policy-section h2 .sec-code {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--amber-deep);
  font-weight: 400;
}
.policy-section p,
.policy-section li { color: var(--gunmetal); }
.policy-section ul { padding-left: 20px; }

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  background: var(--charcoal);
  color: var(--paper);
  border: 1px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-decoration: none;
  padding: 10px 14px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand__logo {
  width: 82px;
  height: 160px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
}

.brand__name {
  font-size: 18px;
  font-weight: 700;
  color: #24262a;
  line-height: 1.1;
}

.brand__tag {
  margin-top: 4px;
  font-size: 10px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: #9a9da3;
}