/* ============================================================
   f3rb — security research blog
   Single stylesheet. Edit tokens below to reskin the whole site.
   ============================================================ */

:root{
  --bg:#FBFCFA;
  --surface:#FFFFFF;
  --line:#E6E9E4;
  --line-soft:#F0F2EE;
  --ink:#101311;
  --ink-2:#3C433D;
  --muted:#7A837C;
  --green:#4FC22E;
  --green-deep:#3A9B1F;
  --green-wash:#EEF9E9;
  --crit:#DC2F45;
  --crit-wash:#FDECEE;
  --high:#E07C00;
  --high-wash:#FFF4E3;
  --violet:#6D5BE0;
  --violet-wash:#F0EEFD;
  --blue:#1E88C7;
  --blue-wash:#EAF5FC;
  --pink:#D6367F;
  --pink-wash:#FDEEF5;
  --code-bg:#F6F8F5;
  --radius:14px;
}

[data-theme="dark"]{
  --bg:#0C0E0C;
  --surface:#131613;
  --line:#232722;
  --line-soft:#1B1F1B;
  --ink:#F0F2EE;
  --ink-2:#C2C8C0;
  --muted:#7E877F;
  --green:#5FD63A;
  --green-deep:#7DE45C;
  --green-wash:#16240F;
  --crit-wash:#2A1114;
  --high-wash:#2A1D08;
  --violet-wash:#191634;
  --blue-wash:#0E2130;
  --pink-wash:#2A1120;
  --code-bg:#171A16;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:Inter,system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;
  transition:background .2s,color .2s;
}
a{color:inherit;text-decoration:none;}
.wrap{max-width:1080px;margin:0 auto;padding:0 28px;}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 28px;}

/* ---------- eyebrow ---------- */
.eyebrow{
  font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:600;
  letter-spacing:.22em;text-transform:uppercase;color:var(--green-deep);
  display:flex;align-items:center;gap:10px;
}
.eyebrow::after{content:"";height:1px;flex:1;background:linear-gradient(90deg,var(--green) 0%,transparent 100%);opacity:.45;}

/* ---------- nav ---------- */
nav{
  position:sticky;top:0;z-index:60;
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line);
}
.navrow{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px;}
.logo{font-family:'Silkscreen',monospace;font-weight:700;font-size:24px;letter-spacing:normal;display:flex;align-items:center;gap:12px;}
.logo .mark{width:56px;height:56px;flex:none;display:block;object-fit:contain;}
.navlinks{display:flex;align-items:center;gap:26px;font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--muted);letter-spacing:.04em;}
.navlinks a{padding:5px 0;border-bottom:1.5px solid transparent;transition:.16s;}
.navlinks a:hover,.navlinks a.active{color:var(--ink);border-color:var(--green);}
.themebtn{
  background:none;border:1px solid var(--line);border-radius:8px;
  width:32px;height:32px;display:grid;place-items:center;cursor:pointer;
  color:var(--muted);font-size:14px;transition:.16s;
}
.themebtn:hover{color:var(--ink);border-color:var(--green);}

/* ---------- breadcrumb ---------- */
.crumb{
  display:flex;align-items:center;gap:9px;padding:26px 0 0;
  font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--muted);
}
.crumb a:hover{color:var(--green-deep);}
.crumb .sep{opacity:.5;}
.crumb .here{color:var(--ink);}

/* ---------- hero ---------- */
header.hero{padding:56px 0 44px;position:relative;overflow:hidden;}
header.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(var(--line) 1px,transparent 1px);
  background-size:22px 22px;opacity:.6;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 78%);
  mask-image:linear-gradient(180deg,#000,transparent 78%);
}
.hero-inner{position:relative;}
.hero h1{
  font-family:Archivo,sans-serif;font-weight:900;
  font-size:clamp(34px,6.2vw,62px);line-height:1.02;
  letter-spacing:-.028em;margin:20px 0 0;max-width:16ch;
}
.hero h1 em{font-style:normal;color:var(--green-deep);}
.lede{font-size:16px;line-height:1.72;color:var(--ink-2);max-width:56ch;margin:20px 0 0;}
.hero-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:26px;font-family:'IBM Plex Mono',monospace;font-size:11.5px;}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 14px;color:var(--ink-2);}
.chip.on{background:var(--green-wash);border-color:color-mix(in srgb,var(--green) 40%,transparent);color:var(--green-deep);font-weight:600;}
.cta-row{display:flex;gap:10px;margin-top:30px;flex-wrap:wrap;}
.btn{
  display:inline-block;font-family:'IBM Plex Mono',monospace;font-size:13px;font-weight:600;
  border-radius:10px;padding:12px 22px;cursor:pointer;border:1px solid transparent;transition:.16s;
}
.btn-primary{background:var(--ink);color:var(--bg);}
.btn-primary:hover{background:var(--green-deep);color:#fff;}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink-2);}
.btn-ghost:hover{border-color:var(--green);color:var(--green-deep);}

/* ---------- featured ---------- */
.featured{
  display:block;margin:52px 0 0;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;transition:.2s;
  box-shadow:0 1px 2px rgba(16,19,17,.04),0 12px 34px -18px rgba(16,19,17,.18);
}
.featured:hover{transform:translateY(-3px);}
.featured img{display:block;width:100%;height:auto;}
.featured-body{padding:24px 28px 26px;border-top:1px solid var(--line-soft);}
.featured-body h2{font-family:Archivo,sans-serif;font-weight:800;font-size:23px;letter-spacing:-.015em;margin:12px 0 8px;}
.featured-body p{color:var(--ink-2);font-size:14.5px;line-height:1.7;margin:0;max-width:66ch;}

/* ---------- sections ---------- */
section{padding:64px 0 0;}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin-bottom:26px;}
.viewall{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);white-space:nowrap;}
.viewall:hover{color:var(--green-deep);}

/* ---------- post grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:20px;}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.2s;}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 32px -18px rgba(16,19,17,.28);}
.cover{display:block;width:100%;height:158px;object-fit:cover;background:var(--green-wash);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:9px;flex:1;}
.row{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.tag{font-family:'IBM Plex Mono',monospace;font-size:10px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;padding:3px 9px;border-radius:4px;}
.sev{font-family:'IBM Plex Mono',monospace;font-size:10px;font-weight:600;letter-spacing:.12em;}
.card h3{font-family:Archivo,sans-serif;font-weight:700;font-size:16.5px;line-height:1.34;letter-spacing:-.012em;margin:0;}
.card p{font-size:13.5px;line-height:1.68;color:var(--muted);margin:0;flex:1;}
.card .foot{display:flex;gap:9px;font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted);border-top:1px solid var(--line-soft);padding-top:11px;margin-top:3px;}
code{font-family:'IBM Plex Mono',monospace;font-size:.88em;background:var(--code-bg);padding:2px 6px;border-radius:4px;color:var(--ink-2);}

/* ---------- blog list rows ---------- */
.postlist{display:flex;flex-direction:column;gap:2px;margin-top:8px;}
.postrow{
  display:grid;grid-template-columns:96px 1fr auto;gap:22px;align-items:center;
  padding:20px 18px;border-radius:12px;border:1px solid transparent;transition:.16s;
}
.postrow:hover{background:var(--surface);border-color:var(--line);}
.postrow .thumb{width:96px;height:64px;border-radius:8px;object-fit:cover;background:var(--green-wash);}
.postrow h3{font-family:Archivo,sans-serif;font-weight:700;font-size:17px;margin:0 0 6px;letter-spacing:-.012em;}
.postrow p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.6;}
.postrow .meta{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--muted);white-space:nowrap;text-align:right;}
.postrow .tagline{display:flex;gap:8px;align-items:center;margin-bottom:8px;}

/* ---------- filter pills ---------- */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 26px;}
.filters button{
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;padding:6px 14px;
  border-radius:999px;border:1px solid var(--line);background:var(--surface);
  color:var(--muted);cursor:pointer;transition:.15s;
}
.filters button:hover{color:var(--ink);}
.filters button.on{background:var(--green-wash);border-color:color-mix(in srgb,var(--green) 40%,transparent);color:var(--green-deep);font-weight:600;}

/* ---------- article ---------- */
article{padding:8px 0 0;}
.post-head{padding:30px 0 34px;border-bottom:1px solid var(--line);margin-bottom:38px;}
.post-head h1{
  font-family:Archivo,sans-serif;font-weight:900;font-size:clamp(28px,4.6vw,44px);
  line-height:1.1;letter-spacing:-.026em;margin:16px 0 16px;
}
.post-head .sub{font-size:17px;line-height:1.65;color:var(--ink-2);margin:0 0 22px;}
.byline{display:flex;align-items:center;gap:12px;font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--muted);flex-wrap:wrap;}
.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--green-deep));display:grid;place-items:center;color:#0B0D0B;font-weight:800;font-family:Archivo,sans-serif;font-size:13px;flex:none;}
.byline .dot{opacity:.45;}

.prose{font-size:16.5px;line-height:1.78;color:var(--ink-2);}
.prose h2{
  font-family:Archivo,sans-serif;font-weight:800;font-size:26px;color:var(--ink);
  letter-spacing:-.02em;margin:52px 0 16px;padding-top:8px;scroll-margin-top:80px;
}
.prose h3{font-family:Archivo,sans-serif;font-weight:700;font-size:19px;color:var(--ink);margin:34px 0 12px;letter-spacing:-.014em;}
.prose p{margin:0 0 20px;}
.prose ul,.prose ol{margin:0 0 22px;padding-left:22px;}
.prose li{margin-bottom:9px;}
.prose strong{color:var(--ink);font-weight:600;}
.prose a{color:var(--green-deep);border-bottom:1px solid color-mix(in srgb,var(--green) 45%,transparent);}
.prose a:hover{border-color:var(--green);}
.prose hr{border:none;border-top:1px solid var(--line);margin:46px 0;}
.prose blockquote{
  margin:0 0 24px;padding:2px 0 2px 20px;border-left:3px solid var(--green);
  color:var(--ink-2);font-style:italic;
}

/* callout */
.callout{
  background:var(--green-wash);border:1px solid color-mix(in srgb,var(--green) 30%,transparent);
  border-radius:12px;padding:20px 24px;margin:0 0 32px;
}
.callout .label{
  font-family:'IBM Plex Mono',monospace;font-size:10.5px;font-weight:600;letter-spacing:.18em;
  text-transform:uppercase;color:var(--green-deep);display:block;margin-bottom:10px;
}
.callout p{margin:0 0 10px;font-size:15.5px;}
.callout p:last-child{margin:0;}
.callout ul{margin:0;padding-left:20px;font-size:15.5px;}

.callout.warn{background:var(--high-wash);border-color:color-mix(in srgb,var(--high) 32%,transparent);}
.callout.warn .label{color:var(--high);}
.callout.danger{background:var(--crit-wash);border-color:color-mix(in srgb,var(--crit) 32%,transparent);}
.callout.danger .label{color:var(--crit);}

/* code blocks */
.prose pre{
  background:var(--code-bg);border:1px solid var(--line);border-radius:10px;
  padding:18px 20px;overflow-x:auto;margin:0 0 26px;
  font-family:'IBM Plex Mono',monospace;font-size:13px;line-height:1.7;color:var(--ink);
}
.prose pre code{background:none;padding:0;font-size:13px;color:inherit;}
.codelabel{
  font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin:0 0 7px;display:block;
}

/* figure / image placeholder */
figure{margin:0 0 32px;}
figure img{width:100%;display:block;border-radius:12px;border:1px solid var(--line);}
figcaption{
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--muted);
  margin-top:10px;line-height:1.6;text-align:center;
}
.imgslot{
  border:1.5px dashed color-mix(in srgb,var(--green) 45%,var(--line));
  background:var(--green-wash);border-radius:12px;
  padding:38px 26px;text-align:center;
}
.imgslot .t{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--green-deep);font-weight:600;display:block;margin-bottom:8px;
}
.imgslot .d{font-size:14px;color:var(--ink-2);line-height:1.6;margin:0;}

/* findings table */
.tablewrap{overflow-x:auto;margin:0 0 30px;}
table{width:100%;border-collapse:collapse;font-size:14px;background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden;}
th{
  text-align:left;font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);font-weight:600;
  padding:13px 16px;border-bottom:1px solid var(--line);background:var(--line-soft);
}
td{padding:13px 16px;border-bottom:1px solid var(--line-soft);color:var(--ink-2);vertical-align:top;}
tr:last-child td{border-bottom:none;}
td strong{color:var(--ink);}

/* severity inline badge */
.b{font-family:'IBM Plex Mono',monospace;font-size:10.5px;font-weight:600;letter-spacing:.1em;padding:3px 8px;border-radius:4px;white-space:nowrap;}
.b-crit{color:var(--crit);background:var(--crit-wash);}
.b-high{color:var(--high);background:var(--high-wash);}
.b-med{color:var(--blue);background:var(--blue-wash);}
.b-ok{color:var(--green-deep);background:var(--green-wash);}

/* post nav */
.postnav{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);margin-top:56px;padding-top:26px;
  font-family:'IBM Plex Mono',monospace;font-size:12.5px;color:var(--muted);
}
.postnav a:hover{color:var(--green-deep);}

/* ---------- about page ---------- */
.about-head{display:flex;align-items:center;gap:18px;margin:34px 0 30px;}
.about-head .avatar{width:62px;height:62px;font-size:22px;}
.about-head h1{font-family:Archivo,sans-serif;font-weight:900;font-size:32px;margin:0 0 4px;letter-spacing:-.02em;}
.about-head .role{font-family:'IBM Plex Mono',monospace;font-size:13px;color:var(--muted);}

/* ---------- subscribe ---------- */
.sub{margin:70px 0 0;background:#101311;border-radius:18px;padding:44px 40px;color:#fff;position:relative;overflow:hidden;}
.sub::after{content:"";position:absolute;right:-60px;bottom:-70px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(79,194,46,.34),transparent 68%);}
.sub h3{font-family:Archivo,sans-serif;font-weight:800;font-size:26px;margin:0 0 10px;letter-spacing:-.02em;}
.sub p{color:#A9B2AA;font-size:14.5px;line-height:1.7;margin:0 0 24px;max-width:48ch;}
.subform{display:flex;gap:10px;flex-wrap:wrap;position:relative;z-index:2;}
.subform input{flex:1;min-width:230px;background:#1B201C;border:1px solid #2C332D;color:#fff;border-radius:10px;padding:13px 16px;font-family:'IBM Plex Mono',monospace;font-size:13px;outline:none;}
.subform input:focus{border-color:#4FC22E;}
.subform button{background:#4FC22E;color:#0B0D0B;border:none;border-radius:10px;padding:13px 26px;font-family:'IBM Plex Mono',monospace;font-weight:600;font-size:13px;cursor:pointer;}
.subform button:hover{background:#5FD63A;}

/* ---------- footer ---------- */
footer{margin-top:70px;border-top:1px solid var(--line);padding:26px 0 50px;}
.footrow{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);}
.footrow .links{display:flex;gap:20px;}
.footrow .links a:hover{color:var(--green-deep);}

:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px;}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;}}

@media (max-width:700px){
  .navlinks a{display:none;}
  .navlinks a.m{display:inline;}
  .sub{padding:34px 24px;}
  .featured-body{padding:20px;}
  .postrow{grid-template-columns:1fr;gap:12px;}
  .postrow .thumb{width:100%;height:150px;}
  .postrow .meta{text-align:left;}
  .prose{font-size:16px;}
}