/* =========================================================================
   hexlab — design system
   Direction: "disassembler / hex dump" — deep blue-black, phosphor teal,
   amber addresses. Signature: hex dump whose ASCII gutter hides the message.
   ========================================================================= */

:root {
  /* palette */
  --bg:        #090d15;
  --bg-2:      #0d131f;
  --bg-3:      #111a29;
  --line:      #1c2839;
  --line-2:    #2a3b54;
  --text:      #b9c5d6;
  --text-dim:  #647188;
  --text-bright:#e9eef6;
  --teal:      #38d6bf;   /* primary accent / phosphor */
  --teal-deep: #1f8a7c;
  --amber:     #ffb454;   /* addresses, hex data */
  --red:       #ff5c7a;   /* pwn / critical */
  --violet:    #a98bff;   /* crypto */
  --blue:      #5aa9ff;   /* web */
  --green:     #7ee081;   /* forensics/misc */

  /* type */
  --display: "Space Grotesk", system-ui, sans-serif;
  --sans: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* layout */
  --maxw: 1120px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 4px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* subtle grid + scanline atmosphere (static, no flicker) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.20;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 90%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background: repeating-linear-gradient(
    to bottom, rgba(0,0,0,0) 0 2px, rgba(0,0,0,0.16) 2px 3px);
  opacity: 0.35;
  mix-blend-mode: multiply;
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

img { max-width: 100%; display: block; }

::selection { background: var(--teal); color: #04120f; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 2;
}

/* ---- typography helpers ---- */
h1, h2, h3, h4 {
  font-family: var(--display);
  color: var(--text-bright);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: var(--teal-deep);
}
.muted { color: var(--text-dim); }
.mono { font-family: var(--mono); }

/* =========================================================================
   NAV
   ========================================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9,13,21,0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.brand:hover { text-decoration: none; }
.brand .b-brk { color: var(--teal); }
.brand .b-cur {
  display: inline-block;
  width: 8px; height: 1.05em;
  background: var(--teal);
  margin-left: 3px;
  transform: translateY(2px);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .brand .b-cur { animation: none; } }

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.nav__links a {
  color: var(--text-dim);
  padding: 7px 12px;
  border-radius: var(--radius);
  position: relative;
}
.nav__links a::before { content: "·"; color: var(--line-2); margin-right: 6px; }
.nav__links a:hover { color: var(--text-bright); text-decoration: none; }
.nav__links a[aria-current="page"] { color: var(--teal); }

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-2);
  color: var(--text-bright);
  font-family: var(--mono);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav__toggle { display: inline-block; }
  .nav__links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-2);
    border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 16px;
    gap: 0;
    display: none;
  }
  .nav__links.open { display: flex; }
  .nav__links a { padding: 12px 4px; border-bottom: 1px solid var(--line); }
  .nav__links a::before { content: ""; margin: 0; }
}

/* =========================================================================
   SECTIONS
   ========================================================================= */
.section { padding-block: clamp(56px, 9vw, 120px); position: relative; z-index: 2; }
.section--tight { padding-block: clamp(40px, 6vw, 72px); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head h2 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  margin-top: 14px;
}
.section-head p { color: var(--text-dim); margin: 14px 0 0; }

/* =========================================================================
   HERO
   ========================================================================= */
.hero { padding-top: clamp(48px, 7vw, 88px); padding-bottom: clamp(40px, 6vw, 72px); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
.hero h1 {
  font-size: clamp(2.3rem, 5.6vw, 4rem);
  margin: 18px 0 0;
}
.hero h1 .accent { color: var(--teal); }
.hero__lead {
  margin: 22px 0 0;
  font-size: 1.08rem;
  color: var(--text);
  max-width: 46ch;
}
.hero__cta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 11px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line-2);
  color: var(--text-bright);
  background: var(--bg-3);
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn:hover { text-decoration: none; border-color: var(--teal-deep); color: var(--teal); }
.btn--primary {
  background: var(--teal);
  color: #04120f;
  border-color: var(--teal);
  font-weight: 600;
}
.btn--primary:hover { background: #4de3cd; color: #04120f; border-color: #4de3cd; }

/* hex dump panel (signature) */
.hexpanel {
  border: 1px solid var(--line);
  border-radius: 6px;
  background:
    linear-gradient(180deg, var(--bg-2), var(--bg));
  box-shadow: 0 30px 80px -40px rgba(0,0,0,0.9);
  overflow: hidden;
}
.hexpanel__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-dim);
}
.hexpanel__bar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line-2); }
.hexpanel__bar .dot--r { background: #4a2733; }
.hexpanel__bar .dot--y { background: #4a3d24; }
.hexpanel__bar .dot--g { background: #204438; }
.hexpanel__bar .file { margin-left: auto; }
.hexdump {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.75;
  padding: 16px 14px;
  overflow-x: auto;
  white-space: pre;
  tab-size: 2;
}
.hexdump .row { display: block; }
.hexdump .off { color: var(--amber); }
.hexdump .byte { color: var(--text); }
.hexdump .byte.hl { color: var(--teal); }
.hexdump .sep { color: var(--line-2); }
.hexdump .asc { color: var(--text-dim); }
.hexdump .asc .p { color: var(--teal); }

/* =========================================================================
   TICKER (marquee of tags)
   ========================================================================= */
.ticker {
  border-block: 1px solid var(--line);
  background: var(--bg-2);
  overflow: hidden;
  position: relative;
  z-index: 2;
}
.ticker__track {
  display: flex;
  gap: 48px;
  padding: 12px 0;
  width: max-content;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  animation: slide 34s linear infinite;
}
.ticker__track span b { color: var(--teal); font-weight: 500; }
@keyframes slide { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .ticker__track { animation: none; } }

/* =========================================================================
   CARDS / WRITEUPS
   ========================================================================= */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.card {
  border: 1px solid var(--line);
  background: var(--bg-2);
  border-radius: 6px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform .18s, border-color .18s;
  position: relative;
}
.card:hover { transform: translateY(-3px); border-color: var(--line-2); text-decoration: none; }
.card__meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.card__title {
  font-family: var(--display);
  font-size: 1.22rem;
  color: var(--text-bright);
  font-weight: 700;
  line-height: 1.18;
}
.card:hover .card__title { color: var(--teal); }
.card__excerpt { color: var(--text-dim); font-size: 0.94rem; margin: 0; flex: 1; }
.card__foot {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--text-dim);
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
.card__foot .go { color: var(--teal); }

/* category tag */
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 3px;
  border: 1px solid currentColor;
  line-height: 1.4;
}
.tag--web { color: var(--blue); }
.tag--pwn { color: var(--red); }
.tag--crypto { color: var(--violet); }
.tag--rev { color: var(--amber); }
.tag--forensics { color: var(--green); }
.tag--osint { color: var(--teal); }

/* difficulty pips */
.diff { display: inline-flex; gap: 3px; align-items: center; }
.diff i { width: 6px; height: 6px; border-radius: 1px; background: var(--line-2); display: inline-block; }
.diff i.on { background: var(--teal); }

/* =========================================================================
   FEATURES / DOMAINS
   ========================================================================= */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.feat {
  background: var(--bg);
  padding: 28px 24px;
}
.feat__no { font-family: var(--mono); color: var(--amber); font-size: 0.78rem; letter-spacing: 0.1em; }
.feat h3 { font-size: 1.15rem; margin: 14px 0 8px; color: var(--text-bright); }
.feat p { margin: 0; color: var(--text-dim); font-size: 0.92rem; }

/* =========================================================================
   FILTER BAR (blog)
   ========================================================================= */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.filter {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 7px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-2);
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.filter:hover { color: var(--text-bright); border-color: var(--line-2); }
.filter[aria-pressed="true"] { color: var(--teal); border-color: var(--teal-deep); background: var(--bg-3); }

/* =========================================================================
   ARTICLE (post pages)
   ========================================================================= */
.article { max-width: 760px; margin: 0 auto; padding-block: clamp(40px, 6vw, 72px); }
.article__head { border-bottom: 1px solid var(--line); padding-bottom: 26px; margin-bottom: 34px; }
.article__meta { font-family: var(--mono); font-size: 0.76rem; color: var(--text-dim); display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 18px; }
.article h1 { font-size: clamp(1.9rem, 5vw, 3rem); }
.article__sub { color: var(--text-dim); margin: 16px 0 0; font-size: 1.05rem; }

.prose { font-size: 1.02rem; }
.prose > * + * { margin-top: 1.25em; }
.prose h2 { font-size: 1.55rem; margin-top: 2em; color: var(--text-bright); }
.prose h3 { font-size: 1.2rem; margin-top: 1.6em; color: var(--text-bright); }
.prose h2::before { content: "## "; color: var(--teal); font-family: var(--mono); font-size: 0.9em; }
.prose h3::before { content: "### "; color: var(--teal-deep); font-family: var(--mono); font-size: 0.9em; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose strong { color: var(--text-bright); }
.prose code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--bg-3);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--amber);
}
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: 0.4em 0; }
.prose li::marker { color: var(--teal); }
.prose blockquote {
  border-left: 2px solid var(--teal-deep);
  padding-left: 18px;
  color: var(--text-dim);
  font-style: italic;
}

pre.code {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.6;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 18px 18px;
  overflow-x: auto;
  color: var(--text);
}
pre.code .c { color: var(--text-dim); }        /* comment */
pre.code .k { color: var(--violet); }           /* keyword */
pre.code .s { color: var(--green); }            /* string */
pre.code .n { color: var(--amber); }            /* number/addr */
pre.code .f { color: var(--teal); }             /* function */
pre.code .prompt { color: var(--teal); }

.callout {
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: 6px;
  padding: 16px 18px;
  background: var(--bg-2);
  font-size: 0.95rem;
}
.callout .lbl { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; display: block; margin-bottom: 6px; }
.callout--flag { border-left-color: var(--teal); }
.callout--flag .lbl { color: var(--teal); }
.callout--note { border-left-color: var(--blue); }
.callout--note .lbl { color: var(--blue); }
.callout--warn { border-left-color: var(--red); }
.callout--warn .lbl { color: var(--red); }

/* =========================================================================
   WHOAMI / ABOUT
   ========================================================================= */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(28px,4vw,56px); align-items: start; }
.stat-line { font-family: var(--mono); font-size: 0.9rem; color: var(--text-dim); display: grid; grid-template-columns: 130px 1fr; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.stat-line b { color: var(--text-bright); font-weight: 500; }
.stat-line .k { color: var(--teal); }

.skillbar { margin: 14px 0; }
.skillbar__head { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 0.8rem; margin-bottom: 6px; }
.skillbar__head .lvl { color: var(--amber); }
.skillbar__track { height: 8px; background: var(--bg-3); border: 1px solid var(--line); border-radius: 2px; overflow: hidden; }
.skillbar__fill { height: 100%; background: repeating-linear-gradient(90deg, var(--teal) 0 6px, transparent 6px 9px); }

.timeline { border-left: 1px solid var(--line); padding-left: 24px; margin-left: 6px; }
.tl-item { position: relative; padding-bottom: 28px; }
.tl-item::before { content: ""; position: absolute; left: -30px; top: 4px; width: 9px; height: 9px; border-radius: 50%; background: var(--bg); border: 2px solid var(--teal); }
.tl-item .yr { font-family: var(--mono); font-size: 0.78rem; color: var(--amber); }
.tl-item h4 { font-family: var(--display); font-size: 1.1rem; color: var(--text-bright); margin: 4px 0 6px; }
.tl-item p { margin: 0; color: var(--text-dim); font-size: 0.94rem; }

/* =========================================================================
   ARSENAL
   ========================================================================= */
.tool-cat { margin-bottom: 40px; }
.tool-cat > h3 { font-family: var(--mono); font-size: 0.85rem; color: var(--teal); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 16px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.tool-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px,1fr)); gap: 14px; }
.tool {
  border: 1px solid var(--line);
  background: var(--bg-2);
  border-radius: 5px;
  padding: 16px 18px;
}
.tool .name { font-family: var(--mono); color: var(--text-bright); font-weight: 500; }
.tool .name b { color: var(--teal); }
.tool p { margin: 6px 0 0; font-size: 0.9rem; color: var(--text-dim); }

/* =========================================================================
   CONTACT
   ========================================================================= */
.field { margin-bottom: 18px; }
.field label { display: block; font-family: var(--mono); font-size: 0.78rem; color: var(--text-dim); margin-bottom: 7px; }
.field label .req { color: var(--teal); }
.input, .textarea {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: 0.92rem;
  padding: 11px 13px;
}
.input:focus, .textarea:focus { outline: none; border-color: var(--teal-deep); }
.textarea { min-height: 140px; resize: vertical; }
.input[aria-invalid="true"], .textarea[aria-invalid="true"] { border-color: var(--red); }

.btn:disabled { opacity: 0.55; cursor: progress; }

.form-status {
  font-family: var(--mono);
  font-size: 0.82rem;
  margin: 14px 0 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: var(--radius);
  background: var(--bg-2);
  color: var(--text-dim);
}
.form-status--ok  { border-left-color: var(--teal); color: var(--teal); }
.form-status--err { border-left-color: var(--red);  color: var(--red);  }

.pgp {
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.5;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
  color: var(--text-dim);
  overflow-x: auto;
  white-space: pre;
}
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 0.9rem; }
.contact-list li .k { color: var(--teal); min-width: 90px; }

/* =========================================================================
   FOOTER
   ========================================================================= */
.footer { border-top: 1px solid var(--line); background: var(--bg-2); padding-block: 40px; position: relative; z-index: 2; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer .prompt { font-family: var(--mono); font-size: 0.85rem; color: var(--text-dim); }
.footer .prompt .u { color: var(--teal); }
.footer .prompt .cur { display: inline-block; width: 8px; height: 1em; background: var(--teal); transform: translateY(2px); margin-left: 3px; animation: blink 1.1s steps(1) infinite; }
.footer__links { display: flex; gap: 18px; font-family: var(--mono); font-size: 0.82rem; }
.footer__links a { color: var(--text-dim); }
.footer__links a:hover { color: var(--teal); text-decoration: none; }
@media (prefers-reduced-motion: reduce){ .footer .prompt .cur { animation: none; } }

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
}

/* focus visibility */
:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; border-radius: 2px; }

/* page header (interior pages) */
.pagehead { padding-top: clamp(48px, 7vw, 80px); padding-bottom: 8px; }
.pagehead h1 { font-size: clamp(2rem, 5.5vw, 3.4rem); margin-top: 16px; }
.pagehead p { color: var(--text-dim); max-width: 60ch; margin: 18px 0 0; font-size: 1.05rem; }

.backlink { font-family: var(--mono); font-size: 0.82rem; color: var(--text-dim); display: inline-flex; gap: 8px; align-items: center; }
.backlink:hover { color: var(--teal); text-decoration: none; }