/* Tie Engineering & Supplying Services — Modern Industrial Theme */
:root {
  --dark: #101311;
  --dark-2: #191d1a;
  --dark-3: #232823;
  --accent: #24d636;
  --accent-dark: #159e24;
  --grey: #5b5b5b;
  --text: #e8eaed;
  --text-muted: #9aa4af;
  --light-bg: #f4f5f7;
  --light-card: #ffffff;
  --ink: #1d232b;
  --ink-muted: #5b6672;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(0,0,0,.12);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--light-bg);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }

/* ===== Top bar ===== */
.topbar { background: var(--dark); color: var(--text-muted); font-size: .85rem; padding: .45rem 0; }
.topbar .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }
.topbar a { color: var(--text-muted); }
.topbar a:hover { color: var(--accent); }
.topbar .tb-item { margin-left: 1.4rem; }
.topbar .tb-item:first-child { margin-left: 0; }

/* ===== Header / nav ===== */
header.site {
  background: #ffffff;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,.12);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: .55rem 0; }
.brand { display: flex; align-items: center; }
.brand img.logo { height: 88px; width: auto; }
nav.menu { display: flex; gap: 1.6rem; align-items: center; }
nav.menu a { color: var(--ink); font-weight: 600; font-size: .92rem; letter-spacing: .02em; padding: .3rem 0; border-bottom: 2px solid transparent; }
nav.menu a:hover, nav.menu a.active { color: var(--accent-dark); border-bottom-color: var(--accent); }
nav.menu a.cta { background: var(--accent); color: var(--dark); padding: .55rem 1.2rem; border-radius: 6px; border: none; font-weight: 700; }
nav.menu a.cta:hover { background: var(--accent-dark); color: #fff; }
.nav-toggle { display: none; background: none; border: 0; color: var(--ink); font-size: 1.6rem; cursor: pointer; }

/* ===== Hero ===== */
.hero {
  position: relative; color: var(--text);
  background: linear-gradient(100deg, rgba(13,16,20,.93) 30%, rgba(13,16,20,.55)), var(--hero-img, var(--dark)) center/cover no-repeat;
  padding: 7rem 0 6rem;
}
.hero.small { padding: 4rem 0 3.5rem; }
.hero .kicker { color: var(--accent); font-weight: 700; letter-spacing: .22em; text-transform: uppercase; font-size: .8rem; margin-bottom: 1rem; }
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); line-height: 1.12; font-weight: 800; max-width: 720px; }
.hero p.lead { margin-top: 1.2rem; max-width: 620px; color: #c5ccd4; font-size: 1.08rem; }
.hero .actions { margin-top: 2.2rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.btn { display: inline-block; padding: .85rem 1.8rem; border-radius: 6px; font-weight: 700; font-size: .95rem; transition: .2s; }
.btn-accent { background: var(--accent); color: var(--dark); }
.btn-accent:hover { background: var(--accent-dark); }
.btn-ghost { border: 2px solid #3a4553; color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Sections ===== */
section.block { padding: 4.5rem 0; }
section.block.dark { background: var(--dark-2); color: var(--text); }
section.block.darker { background: var(--dark); color: var(--text); }
.sec-head { margin-bottom: 2.6rem; max-width: 720px; }
.sec-head .kicker { color: var(--accent-dark); font-weight: 700; letter-spacing: .2em; text-transform: uppercase; font-size: .78rem; }
.dark .sec-head .kicker, .darker .sec-head .kicker { color: var(--accent); }
.sec-head h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800; margin-top: .4rem; }
.sec-head p { color: var(--ink-muted); margin-top: .7rem; }
.dark .sec-head p, .darker .sec-head p { color: var(--text-muted); }

/* ===== Cards / grids ===== */
.grid { display: grid; gap: 1.6rem; }
.grid.g3 { grid-template-columns: repeat(3, 1fr); }
.grid.g4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--light-card); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 14px 34px rgba(0,0,0,.18); }
.card .thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--dark-3); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.card:hover .thumb img { transform: scale(1.06); }
.card .body { padding: 1.3rem 1.4rem 1.5rem; flex: 1; display: flex; flex-direction: column; }
.card .cat { font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-dark); }
.card h3 { font-size: 1.08rem; margin: .35rem 0 .5rem; font-weight: 700; }
.card p { font-size: .9rem; color: var(--ink-muted); flex: 1; }
.card .more { margin-top: 1rem; font-weight: 700; font-size: .88rem; color: var(--ink); }
.card .more::after { content: " →"; color: var(--accent-dark); }
.card:hover .more { color: var(--accent-dark); }

/* service cards on dark */
.scard { background: var(--dark-3); border-radius: var(--radius); padding: 1.8rem 1.6rem; border-top: 3px solid var(--accent); }
.scard h3 { color: var(--text); font-size: 1.08rem; margin-bottom: .6rem; }
.scard p, .scard li { color: var(--text-muted); font-size: .92rem; }
.scard ul { padding-left: 1.1rem; margin-top: .5rem; }

/* ===== Product detail ===== */
.pd-wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 3rem; align-items: start; }
.pd-gallery .main { border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); }
.pd-gallery .main img { width: 100%; aspect-ratio: 4/3; object-fit: contain; background: #fff; }
.pd-thumbs { display: flex; gap: .7rem; margin-top: .8rem; flex-wrap: wrap; }
.pd-thumbs img { width: 84px; height: 66px; object-fit: cover; border-radius: 6px; cursor: pointer; border: 2px solid transparent; background: #fff; }
.pd-thumbs img.sel { border-color: var(--accent); }
.pd-info .cat { color: var(--accent-dark); font-weight: 700; font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; }
.pd-info h1 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; margin: .4rem 0 1rem; }
.pd-info p.desc { color: var(--ink-muted); }
.pd-info h2 { font-size: 1.05rem; margin: 1.6rem 0 .6rem; }
.pd-info ul.specs { list-style: none; }
.pd-info ul.specs li { padding: .55rem 0 .55rem 1.6rem; border-bottom: 1px solid #e3e6ea; position: relative; font-size: .95rem; }
.pd-info ul.specs li::before { content: "▸"; color: var(--accent-dark); position: absolute; left: .2rem; }
.pd-cta { margin-top: 2rem; display: flex; gap: .9rem; flex-wrap: wrap; }
.breadcrumbs { font-size: .85rem; color: var(--ink-muted); margin-bottom: 1.6rem; }
.breadcrumbs a:hover { color: var(--accent-dark); }

/* ===== Catalog search ===== */
.filterbar { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.2rem; align-items: center; }
.filterbar input[type=search] {
  flex: 1; min-width: 240px; padding: .8rem 1.1rem; border: 2px solid #d9dee4;
  border-radius: 8px; font-size: .95rem; background: #fff;
}
.filterbar input[type=search]:focus { outline: none; border-color: var(--accent); }
.chips { display: flex; gap: .5rem; flex-wrap: wrap; }
.chip { padding: .45rem 1rem; border-radius: 99px; background: #fff; border: 1.5px solid #d9dee4; font-size: .82rem; font-weight: 600; cursor: pointer; }
.chip.on { background: var(--dark-2); color: var(--accent); border-color: var(--dark-2); }
.noresults { color: var(--ink-muted); padding: 2rem 0; display: none; }

/* ===== Stats / values ===== */
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.4rem; text-align: center; }
.stat .num { font-size: 2.2rem; font-weight: 800; color: var(--accent); }
.stat .lbl { color: var(--text-muted); font-size: .9rem; }

/* ===== Clients ===== */
.clients { display: flex; flex-wrap: wrap; gap: .7rem; }
.clients span { background: var(--dark-3); color: var(--text-muted); padding: .5rem 1.1rem; border-radius: 99px; font-size: .85rem; }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem; }
.cinfo .item { display: flex; gap: 1rem; margin-bottom: 1.6rem; }
.cinfo .ico { width: 46px; height: 46px; flex: none; border-radius: 8px; background: var(--accent); display: grid; place-items: center; font-size: 1.2rem; }
.cinfo h3 { font-size: .95rem; }
.cinfo p { color: var(--ink-muted); font-size: .92rem; }
form.cform { background: #fff; padding: 2rem; border-radius: var(--radius); box-shadow: var(--shadow); }
form.cform label { font-size: .85rem; font-weight: 700; display: block; margin: 1rem 0 .3rem; }
form.cform input, form.cform textarea { width: 100%; padding: .75rem 1rem; border: 2px solid #d9dee4; border-radius: 8px; font: inherit; }
form.cform input:focus, form.cform textarea:focus { outline: none; border-color: var(--accent); }

/* ===== CTA band ===== */
.ctaband { background: linear-gradient(100deg, #1db32c, var(--accent)); padding: 3.2rem 0; }
.ctaband .container { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.ctaband h2 { color: var(--dark); font-size: clamp(1.3rem, 2.6vw, 1.9rem); font-weight: 800; }
.ctaband .btn { background: var(--dark); color: var(--accent); }

/* ===== Footer ===== */
footer.site { background: var(--dark); color: var(--text-muted); padding: 3.5rem 0 0; font-size: .9rem; }
.f-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.4rem; padding-bottom: 2.6rem; }
footer.site h4 { color: var(--text); font-size: .95rem; margin-bottom: 1rem; letter-spacing: .04em; }
footer.site a:hover { color: var(--accent); }
footer.site ul { list-style: none; }
footer.site li { margin-bottom: .55rem; }
.f-bottom { border-top: 1px solid #2a333e; padding: 1.2rem 0; text-align: center; font-size: .8rem; }

@media (max-width: 900px) {
  .grid.g3, .grid.g4 { grid-template-columns: repeat(2, 1fr); }
  .pd-wrap, .contact-grid { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: repeat(2,1fr); }
  nav.menu {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: #ffffff; flex-direction: column; padding: 1.2rem 4%;
    gap: 1rem; align-items: flex-start; box-shadow: 0 12px 24px rgba(0,0,0,.18);
  }
  nav.menu.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .grid.g3, .grid.g4 { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr; }
  .topbar .container { justify-content: center; }
}