:root{
  --bg:#ffffff; --surface:#f4f4f5; --surface-2:#fafafa; --ink:#18181b; --ink-2:#3f3f46;
  --muted:#71717a; --line:#e4e4e7; --accent:#18181b; --inv:#ffffff;
  --radius:14px; --shadow:0 10px 30px rgba(24,24,27,.07); --shadow-sm:0 4px 14px rgba(24,24,27,.05);
  --font-head:'Spectral',serif; --font-body:'Inter',sans-serif;
}
html[data-theme="dark"]{
  --bg:#0e0e10; --surface:#18181b; --surface-2:#141416; --ink:#f4f4f5; --ink-2:#d4d4d8;
  --muted:#a1a1aa; --line:#2a2a2e; --accent:#f4f4f5; --inv:#0e0e10;
  --shadow:0 10px 30px rgba(0,0,0,.4); --shadow-sm:0 4px 14px rgba(0,0,0,.3);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.7;transition:background .3s,color .3s}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1140px,92%);margin:0 auto}
.narrow{width:min(760px,92%)}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:600;line-height:1.18;letter-spacing:-.015em}
.section{padding:90px 0}
.section-alt{background:var(--surface-2)}
.kicker{display:inline-block;font-weight:600;letter-spacing:.16em;text-transform:uppercase;font-size:.72rem;color:var(--muted);margin-bottom:10px}
.section-head{margin-bottom:48px}
.section-head h2{font-size:clamp(1.8rem,3.4vw,2.6rem)}

/* progress bar */
.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--ink);z-index:200;transition:width .1s linear}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:.5em;padding:13px 26px;border-radius:8px;font-weight:600;font-family:var(--font-body);cursor:pointer;border:1.5px solid transparent;font-size:.94rem;transition:.22s}
.btn-primary{background:var(--ink);color:var(--inv)}
.btn-primary:hover{opacity:.85;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink)}

/* navbar */
.navbar{position:fixed;top:0;left:0;right:0;z-index:100;padding:18px 0;transition:.3s;border-bottom:1px solid transparent}
.navbar.scrolled{background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);border-color:var(--line);padding:12px 0}
.nav-inner{display:flex;align-items:center;justify-content:space-between}
.brand{font-family:var(--font-head);font-weight:700;font-size:1.5rem;color:var(--ink);letter-spacing:-.02em}
.brand span{color:var(--muted)}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-link{font-weight:500;font-size:.94rem;color:var(--muted);transition:.2s}
.nav-link:hover,.nav-link.active{color:var(--ink)}
.nav-tools{display:flex;align-items:center;gap:14px}
.theme-toggle{width:40px;height:40px;border-radius:50%;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;transition:.25s}
.theme-toggle:hover{border-color:var(--ink)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer}
.hamburger span{width:25px;height:2.4px;background:var(--ink);border-radius:3px;transition:.3s}
.hamburger.open span:nth-child(1){transform:translateY(7.4px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7.4px) rotate(-45deg)}

/* hero */
.hero{padding:170px 0 70px}
.hero-inner{max-width:760px}
.eyebrow{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);padding:6px 14px;border-radius:50px;margin-bottom:26px}
.hero h1{font-size:clamp(2.6rem,6vw,4.6rem);font-weight:700}
.hero p{color:var(--muted);font-size:1.18rem;margin:24px 0 32px;max-width:620px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{display:flex;gap:28px;flex-wrap:wrap;margin-top:40px;color:var(--muted);font-size:.9rem;font-weight:500}
.hero-meta i{margin-right:.4em;color:var(--ink-2)}

/* tags */
.post-tags{display:flex;gap:8px;margin-bottom:12px}
.post-tags span{font-size:.72rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);background:var(--surface);padding:4px 10px;border-radius:50px}

/* featured */
.featured-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:34px}
.feat-main img{border-radius:var(--radius);width:100%;height:380px;object-fit:cover;transition:.4s}
.feat-main:hover img{filter:contrast(1.05)}
.feat-body{padding-top:22px}
.feat-body h3{font-size:1.7rem;margin-bottom:10px}
.feat-body h3 a:hover{color:var(--muted)}
.feat-body p{color:var(--muted);margin-bottom:18px}
.byline{display:flex;align-items:center;gap:10px;font-size:.88rem;color:var(--muted)}
.byline img{width:38px;height:38px;border-radius:50%;object-fit:cover}
.byline strong{color:var(--ink)}
.feat-side{display:flex;flex-direction:column;gap:22px}
.feat-mini{display:flex;gap:16px;align-items:center}
.feat-mini img{width:110px;height:84px;border-radius:10px;object-fit:cover;flex-shrink:0}
.feat-mini h4{font-size:1.08rem;line-height:1.3;margin-bottom:4px}
.feat-mini h4 a:hover{color:var(--muted)}
.mini-date{font-size:.8rem;color:var(--muted)}

/* post grid */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.post{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s}
.post:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.post img{height:200px;width:100%;object-fit:cover}
.post-body{padding:22px}
.post-body h3{font-size:1.28rem;margin-bottom:8px}
.post-body h3 a:hover{color:var(--muted)}
.post-body p{color:var(--muted);font-size:.94rem;margin-bottom:14px}

/* categories */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.cat{background:var(--surface);border-radius:var(--radius);padding:30px 20px;text-align:center;transition:.3s;border:1px solid transparent}
.cat:hover{transform:translateY(-5px);border-color:var(--ink)}
.cat i{font-size:1.6rem;color:var(--ink-2);margin-bottom:12px}
.cat h3{font-size:1.06rem;margin-bottom:4px}
.cat span{color:var(--muted);font-size:.82rem}

/* author */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:50px;align-items:center}
.author-media img{border-radius:var(--radius);width:100%;object-fit:cover;filter:grayscale(1);transition:.4s}
.author-media:hover img{filter:grayscale(0)}
.author-text h2{font-size:clamp(1.8rem,3.4vw,2.5rem);margin:6px 0 16px}
.author-text p{color:var(--muted);margin-bottom:14px}
.author-socials{display:flex;gap:12px;margin-top:22px}
.author-socials a{width:42px;height:42px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;color:var(--ink);transition:.25s}
.author-socials a:hover{background:var(--ink);color:var(--inv);border-color:var(--ink)}

/* newsletter */
.news-card{background:var(--ink);color:var(--inv);border-radius:22px;padding:56px 40px;text-align:center}
.news-icon{font-size:2.2rem;margin-bottom:18px;opacity:.9}
.news-card h2{font-size:clamp(1.7rem,3vw,2.3rem);color:var(--inv)}
.news-card p{opacity:.75;margin:14px auto 26px;max-width:460px}
.news-form{display:flex;gap:10px;max-width:460px;margin:0 auto;flex-wrap:wrap}
.news-form input{flex:1;min-width:200px;padding:14px 18px;border-radius:8px;border:none;font-family:inherit;font-size:.95rem}
.news-card .news-submit{background:var(--inv);color:var(--ink);border:none}
.news-card .news-submit:hover{opacity:.85}
.news-fine{display:block;margin-top:16px;font-size:.82rem;opacity:.6}

/* topics */
.topics{display:flex;flex-wrap:wrap;gap:12px}
.topics a{padding:10px 20px;border:1px solid var(--line);border-radius:50px;font-size:.92rem;font-weight:500;color:var(--ink-2);transition:.25s}
.topics a:hover{background:var(--ink);color:var(--inv);border-color:var(--ink)}

/* contact */
.contact-list{list-style:none;margin-top:22px;display:grid;gap:14px}
.contact-list li{display:flex;align-items:center;gap:.8em;color:var(--ink-2)}
.contact-list i{color:var(--muted);width:18px}
.contact-form{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:32px;display:grid;gap:16px}
.field label{display:block;font-weight:600;font-size:.86rem;margin-bottom:6px}
.field input,.field textarea{width:100%;padding:12px 15px;border:1.5px solid var(--line);border-radius:8px;font-family:inherit;font-size:.95rem;background:var(--surface-2);color:var(--ink);transition:.2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--ink);background:var(--bg)}

/* footer */
.footer{border-top:1px solid var(--line);padding:44px 0 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:18px;padding-bottom:32px}
.footer-nav{display:flex;gap:24px;flex-wrap:wrap}
.footer-nav a{color:var(--muted);font-size:.92rem;transition:.2s}
.footer-nav a:hover{color:var(--ink)}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0;text-align:center;font-size:.86rem;color:var(--muted)}
.footer-bottom a{color:var(--ink);font-weight:600}

/* back to top */
.back-to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;border:1.5px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(14px);transition:.3s;box-shadow:var(--shadow);z-index:90}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--ink);color:var(--inv)}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

@media(max-width:1024px){
  .featured-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
  .hamburger{display:flex}
  .nav-menu{position:fixed;top:0;right:-100%;height:100vh;width:78%;max-width:320px;background:var(--bg);flex-direction:column;justify-content:center;gap:26px;box-shadow:-10px 0 40px rgba(0,0,0,.18);transition:right .35s;border-left:1px solid var(--line)}
  .nav-menu.open{right:0}
  .split{grid-template-columns:1fr}
  .author-media{max-width:420px}
}
@media(max-width:560px){
  .post-grid,.cat-grid{grid-template-columns:1fr}
  .section{padding:66px 0}
  .feat-mini{flex-direction:column;align-items:flex-start}
  .feat-mini img{width:100%;height:180px}
}