:root {
  --ink: #1c2126;
  --ink-soft: #55606b;
  --line: #dfe2e5;
  --bg: #f4f4f2;
  --card: #ffffff;
  --steel: #2a3036;
  --dark: #15191d;
  --accent: #1d9bd1;
  --accent-dark: #137aa8;
  --accent-soft: #e2f2fa;
  --max: 1140px;
  --head: "Barlow Condensed", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --body: "Barlow", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

h1, h2, h3 { font-family: var(--head); font-weight: 600; letter-spacing: 0.01em; line-height: 1.1; }
a { color: var(--accent-dark); }
img { max-width: 100%; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding-inline: 20px; }

/* Header */
header.site {
  background: var(--dark);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 3px solid var(--accent);
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-block: 12px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fff;
}
.logo svg { width: 34px; height: 34px; flex: none; }
.logo .word { font-family: var(--head); font-size: 1.55rem; font-weight: 700; letter-spacing: 0.06em; line-height: 1; }
.logo .word small { display: block; font-size: 0.62rem; font-weight: 500; letter-spacing: 0.32em; color: #a9b1b8; margin-top: 3px; }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 24px; }
nav a {
  color: #c8cdd2;
  text-decoration: none;
  font-family: var(--head);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
nav a:hover, nav a.active { color: #fff; }
nav a.active:not(.btn) { box-shadow: inset 0 -2px 0 var(--accent); }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #15191d !important;
  padding: 11px 22px;
  border-radius: 3px;
  text-decoration: none;
  font-family: var(--head);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 0;
  cursor: pointer;
}
.btn:hover { background: #3cb0e2; }
.btn.ghost { background: transparent; color: #fff !important; border: 1px solid rgba(255,255,255,0.5); }
.btn.ghost:hover { border-color: #fff; }
nav a.btn { padding: 7px 16px; }

/* Hero */
.hero {
  position: relative;
  color: #fff;
  background: var(--dark) url("images/hero-tanks.jpg") center / cover no-repeat;
  padding-block: 120px 110px;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(15,18,21,0.92) 0%, rgba(15,18,21,0.75) 50%, rgba(15,18,21,0.35) 100%);
}
.hero .wrap { position: relative; }
.eyebrow {
  font-family: var(--head);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.95rem;
  font-weight: 600;
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  margin: 10px 0 18px;
  max-width: 720px;
  text-transform: uppercase;
}
.hero p.lead { font-size: 1.2rem; color: #d3d8dc; max-width: 600px; margin: 0; }
.hero .actions { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }

.page-head {
  position: relative;
  color: #fff;
  background: var(--steel) center / cover no-repeat;
  padding-block: 72px 60px;
}
.page-head::before { content: ""; position: absolute; inset: 0; background: rgba(15,18,21,0.78); }
.page-head .wrap { position: relative; }
.page-head h1 { margin: 8px 0 10px; font-size: clamp(2.2rem, 5vw, 3.2rem); text-transform: uppercase; }
.page-head p { margin: 0; color: #d3d8dc; max-width: 640px; font-size: 1.1rem; }

/* Proof strip */
.strip { background: var(--steel); color: #d3d8dc; }
.strip .wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px 28px;
  padding-block: 22px;
}
.strip div { display: flex; align-items: center; gap: 12px; font-size: 0.98rem; }
.strip svg { width: 26px; height: 26px; flex: none; }

/* Sections */
section { padding-block: 76px; }
section h2 { font-size: clamp(2rem, 4vw, 2.6rem); margin: 6px 0 12px; text-transform: uppercase; }
section .sub { color: var(--ink-soft); max-width: 700px; margin: 0 0 36px; font-size: 1.08rem; }
.band { background: var(--card); border-block: 1px solid var(--line); }
.dark { background: var(--dark); color: #d3d8dc; }
.dark h2, .dark h3 { color: #fff; }
.dark .sub { color: #aab2b9; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 22px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: 3px;
  padding: 26px;
}
.card h3 { margin: 0 0 8px; font-size: 1.4rem; }
.card p { margin: 0; color: var(--ink-soft); }
.card .icon { width: 36px; height: 36px; margin-bottom: 12px; }
.dark .card { background: #1f252a; border-color: #2e363d; border-top-color: var(--accent); }
.dark .card p { color: #aab2b9; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.split.wide-left { grid-template-columns: 1.15fr 0.85fr; }
@media (max-width: 860px) { .split, .split.wide-left { grid-template-columns: 1fr; gap: 32px; } }

.photo { border-radius: 3px; overflow: hidden; box-shadow: 0 18px 40px rgba(0,0,0,0.18); }
.photo img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.photo.tall img { aspect-ratio: 3 / 4; }

ul.check { list-style: none; padding: 0; margin: 0; }
ul.check li { padding-left: 30px; position: relative; margin-bottom: 12px; }
ul.check li::before {
  content: "";
  position: absolute; left: 2px; top: 8px;
  width: 14px; height: 8px;
  border-left: 3px solid var(--accent);
  border-bottom: 3px solid var(--accent);
  transform: rotate(-45deg);
}

/* Compare table */
.table-scroll { overflow-x: auto; }
table.compare {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
}
table.compare th, table.compare td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.compare thead th { font-family: var(--head); font-size: 1.15rem; letter-spacing: 0.05em; text-transform: uppercase; background: var(--steel); color: #fff; }
table.compare thead th:last-child { background: var(--accent); color: var(--dark); }
table.compare td:first-child { font-weight: 600; width: 22%; }
table.compare td:last-child { background: #f2f9fc; }

/* Roles */
.role { display: flex; gap: 16px; }
.role .tag {
  flex: none;
  font-family: var(--head);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent-dark);
  padding: 4px 10px;
  border-radius: 2px;
  height: fit-content;
}

/* FAQ */
details { background: var(--card); border: 1px solid var(--line); border-radius: 3px; padding: 18px 22px; margin-bottom: 10px; }
details summary { font-weight: 600; cursor: pointer; font-size: 1.05rem; }
details p { margin: 12px 0 0; color: var(--ink-soft); }

/* Pilot */
.pilot { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 760px) { .pilot { grid-template-columns: 1fr; } }

.cta {
  background: var(--dark) url("images/tank-row.jpg") center / cover no-repeat;
  position: relative;
  color: #fff;
  border-radius: 3px;
  overflow: hidden;
  padding: 48px;
}
.cta::before { content: ""; position: absolute; inset: 0; background: rgba(15,18,21,0.84); }
.cta > * { position: relative; }
.cta .inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.cta h2 { margin: 0 0 6px; }
.cta p { margin: 0; color: #d3d8dc; max-width: 560px; }

/* Form */
form.contact { display: grid; gap: 16px; }
form.contact label { font-weight: 600; font-size: 0.92rem; display: block; margin-bottom: 6px; }
form.contact input, form.contact select, form.contact textarea {
  width: 100%; padding: 10px 12px; font: inherit;
  border: 1px solid var(--line); border-radius: 3px; background: #fafafa;
}
form.contact textarea { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.thanks { background: var(--accent-soft); border-radius: 3px; padding: 16px; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: s; position: relative; padding-left: 44px; margin-bottom: 18px; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: 0;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent); color: var(--dark);
  font-family: var(--head); font-weight: 700; text-align: center; line-height: 30px;
}

/* Footer */
footer.site { background: var(--dark); color: #8f98a0; padding-block: 44px 36px; font-size: 0.95rem; }
footer.site .cols { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; }
footer.site h4 { font-family: var(--head); color: #fff; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 10px; font-size: 1rem; }
footer.site a { color: #c8cdd2; text-decoration: none; display: block; margin-bottom: 6px; }
footer.site a:hover { color: #fff; }
footer.site .legal { border-top: 1px solid #2a3036; margin-top: 30px; padding-top: 18px; font-size: 0.85rem; }

@media (max-width: 640px) {
  .hero { padding-block: 80px 70px; }
  section { padding-block: 56px; }
  .cta { padding: 30px; }
}