/*
Theme Name: BD Tech Guide
Theme URI: https://bdtechguide.com/
Author: BD Tech Guide
Description: A clean, modern technology, AI and software magazine theme for BD Tech Guide.
Version: 2.0
License: GPL-2.0-or-later
Text Domain: bd-tech-guide
*/
:root{
  --ink:#0d0924;
  --purple:#4525b8;
  --purple-dark:#31178f;
  --soft:#f4f2fb;
  --soft-2:#ece9f8;
  --muted:#625d72;
  --white:#fff;
  --border:#e4e0ef;
  --max:1180px;
  --radius:22px;
  --shadow:0 14px 40px rgba(27,18,61,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.65}
img{max-width:100%;height:auto}
a{color:inherit}
.container{width:min(92%,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;text-decoration:none;line-height:0;flex:0 0 auto}
.brand-logo{display:block;width:125px;height:auto;max-height:48px;object-fit:contain}
.nav ul{display:flex;align-items:center;gap:22px;list-style:none;margin:0;padding:0}
.nav a{text-decoration:none;font-weight:750;font-size:15px}
.nav a:hover{color:var(--purple)}
.menu-toggle{display:none;background:transparent;border:0;font-size:30px;line-height:1;color:var(--ink);cursor:pointer}
.hero{background:linear-gradient(135deg,var(--soft),#fff);padding:86px 0 76px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center}
.eyebrow,.badge{display:inline-block;font-size:12px;font-weight:850;text-transform:uppercase;letter-spacing:1.2px;color:var(--purple)}
h1,h2,h3{letter-spacing:-1.6px}
h1{font-size:clamp(42px,6vw,76px);line-height:1.02;margin:14px 0 24px}
h2{font-size:clamp(32px,4vw,50px);line-height:1.08;margin:0 0 16px}
h3{font-size:23px;line-height:1.2;margin:10px 0 12px}
.hero p{font-size:20px;line-height:1.65;color:#302b43;max-width:680px}
.hero-art{background:#e9e5f6;border-radius:28px;overflow:hidden;box-shadow:var(--shadow)}
.hero-art img{display:block;width:100%}
.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--purple);color:#fff!important;text-decoration:none;padding:14px 24px;border-radius:999px;font-weight:850;border:2px solid var(--purple);transition:.2s}
.button:hover{background:var(--purple-dark);border-color:var(--purple-dark);transform:translateY(-1px)}
.button.secondary{background:transparent;color:var(--purple)!important}
.section{padding:82px 0}
.section.alt{background:var(--soft)}
.section-head{max-width:760px;margin-bottom:38px}
.section-head p,.card p,.post-card p{color:var(--muted);font-size:17px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{padding:30px;border:1px solid var(--border);border-radius:var(--radius);background:#fff;box-shadow:0 8px 24px rgba(27,18,61,.04)}
.card-icon{width:48px;height:48px;border-radius:15px;background:var(--soft);color:var(--purple);display:grid;place-items:center;font-weight:900;margin-bottom:18px}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{border:1px solid var(--border);border-radius:var(--radius);background:#fff;overflow:hidden;box-shadow:0 8px 24px rgba(27,18,61,.04)}
.post-card .thumb{aspect-ratio:16/9;background:var(--soft-2)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.post-card .body{padding:24px}
.post-card a{text-decoration:none}
.post-card h3 a:hover{color:var(--purple)}
.meta{font-size:13px;color:var(--muted)}
.page-hero{background:var(--soft);padding:70px 0}
.page-hero h1{font-size:clamp(42px,5vw,64px);margin:12px 0 0}
.content{padding:70px 0}
.content-inner{max-width:860px}
.content-inner p,.content-inner li{font-size:18px}
.content-inner h2{margin-top:42px}
.notice{padding:16px 20px;border-left:4px solid var(--purple);background:var(--soft);border-radius:0 12px 12px 0}
.cta{background:linear-gradient(135deg,#2f177f,var(--purple));color:#fff;border-radius:28px;padding:50px}
.cta h2{color:#fff}
.cta p{color:#eee;max-width:700px;font-size:18px}
.cta .button{background:#fff;color:var(--purple)!important;border-color:#fff}
.empty{padding:28px;border:1px dashed #cfc9df;border-radius:18px;color:var(--muted)}
.site-footer{background:#11101a;color:#fff;padding:56px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px}
.footer-grid h3{color:#fff}
.footer-grid p{color:#bdb8ca}
.footer-grid a{text-decoration:none;color:#ddd}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid #35313f;margin-top:38px;padding-top:18px;color:#9f9aaa;font-size:14px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:900px){
  .header-inner{min-height:66px}
  .brand-logo{width:100px;max-height:40px}
  .menu-toggle{display:flex;align-items:center;justify-content:center;width:42px;height:42px;padding:0}
  .nav{display:none;position:absolute;left:0;right:0;top:66px;background:#fff;padding:18px 4%;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav.open{display:block}
  .nav ul{flex-direction:column;align-items:flex-start;gap:15px}
  .hero{padding:58px 0}
  .hero-grid,.cards,.post-grid,.footer-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  .page-hero{padding:55px 0}
}
@media(max-width:520px){
  h1{font-size:43px}
  .hero p{font-size:18px}
  .cta{padding:34px 25px}
}