/* NexoraVaultHub - production CSS */
*,*::before,*::after{box-sizing:border-box}
:root{
 --bg:#0b0f1a;--bg2:#11172a;--surface:#161d33;--surface2:#1b2340;--text:#e7ecf7;--muted:#9aa6c3;--brand:#6366f1;--brand2:#06b6d4;--accent:#f59e0b;--danger:#ef4444;--border:#243056;--radius:14px;--max:1200px;--shadow:0 10px 30px rgba(0,0,0,.35);
 --font:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:#a5b4fc;text-decoration:none}
a:hover{color:#c7d2fe;text-decoration:underline}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{font-weight:800;line-height:1.2;letter-spacing:-.02em;margin:0 0 .6em}
h1{font-size:clamp(2rem,5vw,3.4rem)}
h2{font-size:clamp(1.5rem,3.4vw,2.2rem)}
h3{font-size:1.25rem}
p{margin:0 0 1em}
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.3rem;border-radius:999px;font-weight:700;background:linear-gradient(135deg,var(--brand),var(--brand2));color:white;border:0;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:var(--shadow)}
.btn:hover{transform:translateY(-2px);text-decoration:none;color:white}
.btn.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}
.badge{display:inline-block;padding:.25rem .7rem;border-radius:999px;background:var(--surface2);color:var(--muted);font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}

/* HEADER */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,15,26,.85);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:white}
.logo img{width:32px;height:32px}
.nav-links{display:flex;gap:6px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav-links a{color:var(--text);padding:.5rem .8rem;border-radius:8px;font-weight:500;font-size:.95rem}
.nav-links a:hover{background:var(--surface);text-decoration:none}
.nav-cta{display:flex;gap:8px;align-items:center}
.menu-toggle{display:none;background:transparent;border:1px solid var(--border);color:white;padding:.5rem .7rem;border-radius:8px;cursor:pointer;font-size:1.2rem}
@media(max-width:960px){
 .menu-toggle{display:inline-flex}
 .nav-links{position:absolute;top:64px;left:0;right:0;background:var(--bg2);flex-direction:column;padding:14px;border-bottom:1px solid var(--border);display:none}
 .nav-links.open{display:flex}
 .nav-links a{padding:.7rem .8rem;border-radius:8px}
 .nav-cta .btn{display:none}
}

/* HERO */
.hero{position:relative;padding:80px 0 60px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-20%;background:radial-gradient(60% 50% at 30% 20%,rgba(99,102,241,.35),transparent 60%),radial-gradient(50% 50% at 80% 60%,rgba(6,182,212,.3),transparent 60%);z-index:0}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1 span{background:linear-gradient(120deg,#a78bfa,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:var(--muted);font-size:1.15rem;max-width:60ch}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.hero-art{border-radius:24px;overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
@media(max-width:880px){.hero .container{grid-template-columns:1fr}.hero{padding:50px 0 30px}}

/* SECTIONS */
section.block{padding:60px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.section-head h2{margin:0}
.section-head p{color:var(--muted);margin:.3rem 0 0}

/* GRID CARDS */
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:980px){.grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid.cols-3,.grid.cols-4,.grid.cols-2{grid-template-columns:1fr}}

.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .25s,border-color .25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);border-color:#3a4a85}
.card .thumb{aspect-ratio:16/9;background:var(--surface2);overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.card h3{margin:0;font-size:1.1rem;line-height:1.3}
.card h3 a{color:white}
.card .meta{display:flex;gap:10px;align-items:center;font-size:.82rem;color:var(--muted)}
.card .excerpt{color:var(--muted);font-size:.95rem;margin:0;flex:1}

/* CATEGORY CHIPS */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:var(--surface);border:1px solid var(--border);color:var(--text);padding:.6rem 1rem;border-radius:999px;font-weight:600;font-size:.9rem}
.chip:hover{background:var(--surface2);text-decoration:none}

/* TOOL CARDS */
.tool{display:flex;gap:12px;padding:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}
.tool .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;font-weight:800;color:white;flex-shrink:0}
.tool h4{margin:0 0 4px;font-size:1rem}
.tool p{margin:0;color:var(--muted);font-size:.88rem}

/* NEWSLETTER */
.newsletter{background:linear-gradient(135deg,rgba(99,102,241,.18),rgba(6,182,212,.15));border:1px solid var(--border);border-radius:24px;padding:40px;text-align:center}
.newsletter form{display:flex;gap:10px;max-width:520px;margin:18px auto 0;flex-wrap:wrap;justify-content:center}
.newsletter input{flex:1;min-width:220px;padding:.85rem 1rem;border-radius:999px;border:1px solid var(--border);background:var(--bg2);color:white;font-size:1rem}
.newsletter input:focus{outline:2px solid var(--brand)}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--muted)}
.faq details[open] summary::after{content:"–"}
.faq details[open]{border-color:#3a4a85}

/* TESTIMONIALS */
.testi{background:var(--surface);border:1px solid var(--border);padding:22px;border-radius:var(--radius)}
.testi p{font-style:italic;color:#dde4f5}
.testi .who{display:flex;gap:10px;align-items:center;margin-top:12px}
.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:white;font-weight:800}

/* AUTHOR */
.author-box{display:grid;grid-template-columns:120px 1fr;gap:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;align-items:center}
.author-box img{width:120px;height:120px;border-radius:50%;object-fit:cover}
@media(max-width:560px){.author-box{grid-template-columns:1fr;text-align:center}.author-box img{margin:0 auto}}

/* SOCIAL EMBED PLACEHOLDERS */
.social-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.social-grid .ph{aspect-ratio:1;background:var(--surface2);border-radius:10px;display:grid;place-items:center;color:var(--muted);font-size:.85rem;border:1px solid var(--border)}
@media(max-width:720px){.social-grid{grid-template-columns:repeat(2,1fr)}}

/* FOOTER */
footer.site-footer{background:#070b15;border-top:1px solid var(--border);padding:50px 0 20px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1fr;gap:30px}
.footer-grid h4{color:white;font-size:1rem;margin:0 0 14px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:8px}
.footer-grid a{color:var(--muted);font-size:.92rem}
.footer-grid a:hover{color:white}
.socials{display:flex;gap:10px;margin-top:14px}
.socials a{width:38px;height:38px;border-radius:10px;background:var(--surface);display:grid;place-items:center;color:white;border:1px solid var(--border)}
.socials a:hover{background:var(--surface2);text-decoration:none}
.copyright{text-align:center;margin-top:40px;padding-top:20px;border-top:1px solid var(--border);color:var(--muted);font-size:.9rem}
@media(max-width:960px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}}

/* ARTICLE */
.article{display:grid;grid-template-columns:1fr 280px;gap:40px;padding:40px 0}
@media(max-width:960px){.article{grid-template-columns:1fr}}
.article-content{max-width:760px}
.article-content figure{margin:24px 0}
.article-content figure img{border-radius:12px;border:1px solid var(--border)}
.article-content figcaption{color:var(--muted);font-size:.88rem;margin-top:8px;text-align:center}
.article-content h2{margin-top:1.6em}
.article-content h3{margin-top:1.4em;font-size:1.3rem}
.article-content ul,.article-content ol{padding-left:1.4em}
.article-content li{margin-bottom:.5em}
.article-content blockquote{border-left:3px solid var(--brand);padding:.4em 1em;color:#dde4f5;margin:1.4em 0;background:var(--surface);border-radius:6px}
.article-meta{display:flex;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:.92rem;margin:10px 0 30px;align-items:center}
.toc{position:sticky;top:90px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;align-self:start;max-height:80vh;overflow:auto}
.toc h4{margin:0 0 10px}
.toc ol{margin:0;padding-left:1.2em}
.toc a{color:var(--muted);font-size:.92rem}
.toc a:hover{color:white}
.breadcrumb{font-size:.88rem;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--muted)}
.share{display:flex;gap:8px;margin:20px 0}
.share a{background:var(--surface);border:1px solid var(--border);color:white;padding:.5rem .9rem;border-radius:8px;font-size:.85rem}
.prev-next{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:30px 0}
.prev-next a{background:var(--surface);border:1px solid var(--border);padding:14px;border-radius:12px;color:white;display:block}
.prev-next a span{display:block;color:var(--muted);font-size:.8rem;margin-bottom:4px}
@media(max-width:560px){.prev-next{grid-template-columns:1fr}}

.notice{background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--accent);padding:14px 18px;border-radius:8px;margin:18px 0}

/* PAGE INTRO */
.page-intro{padding:60px 0 20px;text-align:center}
.page-intro p{color:var(--muted);max-width:680px;margin:10px auto 0}

/* FORM */
.form{display:grid;gap:14px;max-width:600px}
.form label{display:block;font-weight:600;margin-bottom:6px}
.form input,.form textarea,.form select{width:100%;padding:.75rem 1rem;border-radius:10px;border:1px solid var(--border);background:var(--bg2);color:white;font-family:inherit;font-size:1rem}
.form textarea{min-height:140px;resize:vertical}
.form input:focus,.form textarea:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:40px}
@media(max-width:880px){.contact-grid{grid-template-columns:1fr}}
.info-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;display:grid;gap:14px}
.info-card a{color:white;font-weight:600}

/* 404 */
.center-screen{min-height:60vh;display:grid;place-items:center;text-align:center;padding:60px 20px}
.center-screen h1{font-size:clamp(4rem,12vw,8rem);background:linear-gradient(120deg,#a78bfa,#22d3ee);-webkit-background-clip:text;color:transparent}

/* a11y */
:focus-visible{outline:2px solid #c7d2fe;outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:white;padding:.6rem 1rem;border-radius:8px;z-index:100}
.skip-link:focus{left:10px;top:10px}