/* ====== H4U main stylesheet (external) ====== */

/* Reset + base */
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;font:16px/1.6 system-ui,Segoe UI,Roboto,Arial,sans-serif;background:#0b0f14;color:#f0f4f8;overflow-x:hidden}
a{color:#00ff88;text-decoration:none}
img,svg{max-width:100%;height:auto;display:block}

/* Utilities */
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.section{padding:32px 16px}
.text-center{text-align:center}
.hide{display:none!important}

/* Header + nav */
header{position:static;top:0;background:#0e141c;border-bottom:1px solid #1b2532;z-index:100}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700}
.brand svg{width:28px;height:32px}
.menu{display:flex;gap:18px}
.menu-list{list-style:none;margin:0;padding:0;display:flex;gap:18px}
.menu-list a{padding:8px 10px;border-radius:10px;display:block}
.menu-list a:hover{background:#121b27}
.burger{display:none;background:none;border:1px solid #253244;border-radius:12px;padding:8px 12px;color:#f0f4f8}
@media (max-width:860px){
  .menu{display:none}
  .burger{display:block}
  .menu.open{display:block;position:absolute;right:16px;top:64px;background:#0e141c;border:1px solid #1b2532;border-radius:12px;padding:8px}
  .menu-list{flex-direction:column;gap:6px}
}

/* Hero */
.hero{padding:48px 16px;background:linear-gradient(180deg,#0b0f14,#121922);text-align:center}
.hero h1{font-size:clamp(28px,7vw,40px);line-height:1.2;margin:16px 0 8px}
.hero p{margin:6px 0}
.badges{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:14px 0}
.badge{display:inline-flex;align-items:center;justify-content:center;border:1px solid #00ff88;border-radius:999px;padding:6px 12px;margin:4px}

/* Buttons */
.btn{display:inline-block;padding:10px 16px;border:1px solid #00ff88;border-radius:12px;color:#f0f4f8}
.btn + .btn{margin-left:8px}
.cta{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:12px 0}

/* Grid + cards */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:900px){.grid{grid-template-columns:1fr}}
.card{background:#0e141c;border:1px solid #1b2532;border-radius:16px;padding:20px}
.card h3{margin:0 0 8px}
.card ul{margin:0;padding-left:18px}

/* Footer */
footer{border-top:1px solid #1b2532;background:#0e141c;padding:20px 0;color:#8ca0b4;text-align:center}

/* Content tweaks */
h2{text-align:center;margin:0 0 16px;font-size:clamp(22px,4vw,34px)}
ol,ul{word-wrap:break-word;overflow-wrap:break-word}
a:focus{outline:2px dashed #00ff88;outline-offset:2px}

/* Browser-specific tweaks via classes */
.is-ios .btn{padding-top:12px;padding-bottom:12px}
.is-android .menu-list a{padding:12px 10px}
.is-safari .hero h1{letter-spacing:0.2px}


/* h4u blog grid */
.h4u-grid{display:grid;gap:16px}
.h4u-cols-1{grid-template-columns:1fr}
.h4u-cols-2{grid-template-columns:repeat(2,1fr)}
.h4u-cols-3{grid-template-columns:repeat(3,1fr)}
.h4u-card{padding:16px;border:1px solid #1b2532;border-radius:16px;background:#0b1017}
.h4u-card h2{font-size:20px;margin:0 0 8px}
.h4u-tags{margin-top:8px;font-size:13px;opacity:.9}
.h4u-tags a{display:inline-block;margin:2px 6px 0 0;text-decoration:none;border:1px solid #2a3a50;border-radius:999px;padding:2px 8px}
@media(max-width:900px){.h4u-cols-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.h4u-cols-2,.h4u-cols-3{grid-template-columns:1fr}}