/*
Theme Name: Helix Systems
Theme URI: https://helixsystems.com.bd
Author: Helix Systems
Description: Custom one-page business theme for Helix Systems (IT support, networking and equipment rental), with English and Bangla switch.
Version: 1.0
Text Domain: helix-systems
*/
:root{--bg:#fff;--bg2:#f5f6f8;--ink:#1a1a1a;--mut:#5b6068;--line:#e3e5e8;--red:#e5322d;--navy:#0b1f3a;--hd:#0b1f3a;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#10141b;--bg2:#181e28;--ink:#f1f3f6;--mut:#a3abb8;--line:#2a3240;--navy:#e8edf5;--hd:#070b12}}
:root[data-theme="dark"]{--bg:#10141b;--bg2:#181e28;--ink:#f1f3f6;--mut:#a3abb8;--line:#2a3240;--navy:#e8edf5;--hd:#070b12}
html{scroll-padding-top:env(safe-area-inset-top,0px);scroll-behavior:smooth}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Poppins,"Noto Sans Bengali",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
.w{max-width:1060px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:env(safe-area-inset-top,0px);z-index:5}
.nav{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-weight:500;font-size:24px;line-height:1}
.logo small{display:block;font-size:9px;letter-spacing:5px;color:var(--mut);font-weight:400;margin-top:3px}
nav{display:flex;gap:18px;font-size:14px;color:var(--mut);align-items:center}
nav a:hover{color:var(--red)}
.lang{display:flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.lang button{border:0;background:none;color:var(--mut);padding:5px 10px;font:inherit;font-size:13px;cursor:pointer}
.lang button.on{background:var(--red);color:#fff}
.btn{display:inline-block;background:var(--red);color:#fff;padding:12px 22px;border-radius:8px;font-weight:500;font-size:15px}
.btn.o{background:none;color:var(--ink);border:1px solid var(--line)}
.btn.s{padding:8px 16px;font-size:14px}
.hero{padding:64px 0 0;background:var(--bg2)}
.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.2;margin:0 0 16px;font-weight:600;color:var(--navy);max-width:680px;border-left:5px solid var(--red);padding-left:16px}
.hero p{max-width:560px;color:var(--mut);font-size:17px;margin:0 0 26px}
.b{display:flex;gap:12px;flex-wrap:wrap}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin-top:48px;transform:translateY(34px)}
section{padding:60px 0}
.first{padding-top:96px}
h2{font-size:28px;margin:0 0 8px;color:var(--navy);font-weight:600}
.sub{color:var(--mut);margin:0 0 30px;max-width:560px}
.g{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.c{border:1px solid var(--line);border-radius:12px;padding:22px;background:var(--bg)}
.c h3{margin:0 0 6px;font-size:17px;font-weight:600}
.c p{margin:0;color:var(--mut);font-size:14.5px}
.c svg{width:30px;height:30px;stroke:var(--red);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;margin-bottom:12px;display:block}
.pj{border-left:4px solid var(--red);max-width:640px}
.alt{background:var(--bg2)}
.n{font-size:30px;font-weight:600;color:var(--red);margin-bottom:4px}
.ic{display:flex;align-items:center;gap:12px;font-weight:500;font-size:15px}
.ic svg{margin:0;flex:none}
.band{background:var(--hd);color:#fff;text-align:center;padding:56px 0}
.band h2{color:#fff}.band .b{justify-content:center;margin-top:18px}
.band .btn.o{color:#fff;border-color:#ffffff55}
.ct{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.ct b{display:block;font-size:13px;color:var(--mut);font-weight:500;margin-bottom:4px}
footer{border-top:1px solid var(--line);padding:24px 0;font-size:13px;color:var(--mut)}
footer .w{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.page-wrap{max-width:820px;margin:0 auto;padding:60px 20px}
.page-wrap h1{color:var(--navy);font-size:32px;margin:0 0 20px}
.page-wrap a{color:var(--red)}