/* tradekast — Infrastructure Supply Solutions */
:root {
  --orange: #F05A28;
  --ink: #141414;
  --ink2: #1F1F1F;
  --off: #F6F6F5;
  --line: #E4E2DF;
  --mut: #5F5F5F;
  --faint: #9C9A97;
  --dim: #B9B7B4;
  --max: 1180px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, 'Helvetica Neue', Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* typography */
.kicker {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 14px;
}
h1 { font-size: clamp(34px, 5vw, 58px); font-weight: 800; line-height: 1.08; letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; line-height: 1.12; letter-spacing: -0.015em; }
h3 { font-size: 19px; font-weight: 700; line-height: 1.3; }
.lead { font-size: 18px; color: var(--mut); max-width: 640px; }
.sub { color: var(--mut); }
.on-dark h1, .on-dark h2, .on-dark h3 { color: #fff; }
.on-dark .lead, .on-dark .sub { color: var(--dim); }
.dark .lead, .dark .sub, .band .sub { color: var(--dim); }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.site-header .logo img { height: 34px; width: auto; }
.nav { display: flex; gap: 34px; align-items: center; }
.nav a {
  font-size: 14px; font-weight: 600; color: var(--ink);
  letter-spacing: 0.02em;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s;
}
.nav a:hover { color: var(--orange); }
.nav a.active { border-bottom-color: var(--orange); }
.nav .cta {
  background: var(--ink); color: #fff;
  padding: 11px 22px; border-bottom: none;
  font-weight: 700; font-size: 13px;
  transition: background .15s;
}
.nav .cta:hover { background: var(--orange); color: #fff; }
.menu-btn { display: none; background: none; border: none; cursor: pointer; }
.menu-btn span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; }

/* hero */
.hero {
  position: relative; color: #fff;
  background: var(--ink);
  overflow: hidden;
}
.hero .bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: .55;
}
.hero .shade {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(15,15,15,.92) 0%, rgba(15,15,15,.72) 45%, rgba(15,15,15,.25) 100%);
}
.hero .wrap { position: relative; padding-top: 120px; padding-bottom: 120px; }
.hero.tall .wrap { padding-top: 150px; padding-bottom: 150px; }
.hero p.lead { color: #D9D7D4; margin-top: 26px; }
.hero .actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

/* buttons */
.btn {
  display: inline-block;
  padding: 15px 30px;
  font-size: 14px; font-weight: 700; letter-spacing: 0.04em;
  transition: all .15s;
}
.btn-orange { background: var(--orange); color: #fff; }
.btn-orange:hover { background: #d84a1b; }
.btn-ghost { border: 1px solid rgba(255,255,255,.4); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: var(--orange); }

/* sections */
section { padding: 96px 0; }
section.tight { padding: 72px 0; }
section.dark { background: var(--ink); color: #fff; }
section.off { background: var(--off); }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .lead { margin-top: 18px; }

/* grids & cards */
.grid { display: grid; gap: 28px; }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--off);
  padding: 34px 30px;
}
.dark .card { background: var(--ink2); }
.card .num {
  font-size: 15px; font-weight: 800; color: var(--orange);
  letter-spacing: 0.06em; display: block; margin-bottom: 16px;
}
.card h3 { margin-bottom: 10px; }
.dark .card h3 { color: #fff; }
.card p { font-size: 14.5px; color: var(--mut); }
.dark .card p { color: var(--dim); }

/* split layouts */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.split .img-col img { width: 100%; height: 100%; object-fit: cover; }
.split .kicker { margin-bottom: 14px; }
.split h2 { margin-bottom: 20px; }
.split p + p { margin-top: 14px; }
.split ul.checks { margin-top: 26px; list-style: none; }
.split ul.checks li {
  padding-left: 28px; position: relative;
  font-weight: 600; margin-bottom: 13px; font-size: 15.5px;
}
.split ul.checks li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 11px; height: 11px; background: var(--orange);
}

/* stat band / statement */
.band {
  background: var(--ink); color: #fff;
  padding: 60px 0;
}
.band .wrap { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.band h2 { color: #fff; }
.band .dot { color: var(--orange); }

/* process steps */
.steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.step { text-align: center; }
.step .n {
  width: 52px; height: 52px; margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 15px;
}
.step:last-child .n { background: var(--orange); }
.step h4 { font-size: 13.5px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--mut); }

/* product feature rows */
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px;
  align-items: center; padding: 64px 0;
  border-top: 1px solid var(--line);
}
.feature-row:first-of-type { border-top: none; }
.feature-row img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.feature-row .tag {
  font-size: 12px; font-weight: 700; letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--faint); display: block; margin-bottom: 10px;
}
.feature-row h3 { font-size: 26px; margin-bottom: 14px; }
.feature-row p { color: var(--mut); }
.feature-row ul { margin-top: 18px; list-style: none; }
.feature-row ul li {
  font-size: 14.5px; padding: 9px 0 9px 24px; position: relative;
  border-bottom: 1px solid var(--line); color: var(--ink);
}
.feature-row ul li::before {
  content: ""; position: absolute; left: 0; top: 16px;
  width: 8px; height: 8px; background: var(--orange);
}

/* footer */
.site-footer { background: var(--ink); color: var(--dim); padding: 72px 0 36px; }
.site-footer .top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 48px; border-bottom: 1px solid #2A2A2A;
}
.site-footer .logo img { height: 36px; width: auto; margin-bottom: 18px; }
.site-footer p { font-size: 14px; max-width: 320px; }
.site-footer h5 {
  color: #fff; font-size: 12px; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 18px;
}
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul a { font-size: 14px; color: var(--dim); transition: color .15s; }
.site-footer ul a:hover { color: var(--orange); }
.site-footer .bottom {
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  padding-top: 32px;
  font-size: 12px; letter-spacing: 0.08em; color: #7A7A7A;
}
.site-footer .bottom .tag { color: var(--orange); font-weight: 700; letter-spacing: 0.18em; }

/* page hero (interior) */
.page-hero {
  background: var(--ink); color: #fff;
  padding: 88px 0 72px;
  position: relative; overflow: hidden;
}
.page-hero .bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .28; }
.page-hero .wrap { position: relative; }
.page-hero p.lead { color: var(--dim); margin-top: 20px; }

/* contact */
.contact-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 72px; }
.contact-card {
  border: 1px solid var(--line);
  padding: 26px 28px; margin-bottom: 18px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.contact-card b { display: block; font-size: 15px; }
.contact-card span { font-size: 13.5px; color: var(--mut); }
.contact-card a.mail { font-weight: 700; color: var(--orange); font-size: 15px; white-space: nowrap; }
.form-note { background: var(--off); padding: 28px; font-size: 14px; color: var(--mut); }
form .field { margin-bottom: 18px; }
form label { display: block; font-size: 13px; font-weight: 700; letter-spacing: .05em; margin-bottom: 7px; }
form input, form textarea {
  width: 100%; padding: 13px 14px;
  border: 1px solid var(--line); background: #fff;
  font-family: inherit; font-size: 15px; color: var(--ink);
}
form input:focus, form textarea:focus { outline: 2px solid var(--orange); border-color: transparent; }
form button { border: none; cursor: pointer; width: 100%; }

/* responsive */
@media (max-width: 960px) {
  .grid.c4, .grid.c3 { grid-template-columns: repeat(2, 1fr); }
  .split, .feature-row, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .site-footer .top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav { display: none; position: absolute; top: 76px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 24px; gap: 20px;
    border-bottom: 1px solid var(--line); }
  .nav.open { display: flex; }
  .menu-btn { display: block; }
  .grid.c4, .grid.c3, .grid.c2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  section { padding: 64px 0; }
  .hero .wrap { padding-top: 80px; padding-bottom: 80px; }
}