/* =========================================================
   Cybersecurity Portfolio – design tokens
   Change colours here and the whole site follows.
   ========================================================= */
:root {
  --bg: #08080a;          /* obsidian black */
  --bg-alt: #0d0d10;
  --surface: #141418;
  --surface-2: #1c1c22;
  --border: #27272f;
  --text: #ececf1;
  --muted: #9a9aa8;
  --accent: #00e0b8;      /* terminal green */
  --on-accent: #04110e;   /* text on green buttons */
  --accent-2: #00e0b8;    /* terminal green-cyan */
  --warn: #ffb547;
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --shadow: 0 10px 30px rgba(0, 0, 0, .6);
  --nav-h: 68px;
  --section-pad: 100px;  /* space above and below each section */
  --nav-gap: 28px;       /* space between the menu bar and a heading after clicking a menu link */
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }

.container { width: min(1140px, 100% - 32px); margin-inline: auto; }
.mono { font-family: var(--mono); }
.accent { color: var(--accent-2); }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--accent); color: var(--on-accent); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip-link:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; }

/* ---------- Buttons, chips, tags ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .8em 1.4em; border-radius: 10px;
  font-weight: 600; font-size: .95rem; border: 1px solid transparent;
  cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s;
  font-family: inherit;
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 6px 20px rgba(0, 224, 184, .35); }
.btn--primary:hover { box-shadow: 0 10px 28px rgba(0, 224, 184, .5); }
.btn--ghost { border-color: var(--accent); color: var(--accent); background: transparent; }
.btn--ghost:hover { background: rgba(0, 224, 184, .1); }

.chip {
  display: inline-block; padding: .35em .9em; border: 1px solid var(--border);
  border-radius: 999px; color: var(--muted); font-size: .88rem; transition: .2s;
}
.chip:hover { color: var(--text); border-color: var(--accent); text-decoration: none; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.tags span {
  font-family: var(--mono); font-size: .74rem; color: var(--accent-2);
  background: rgba(0, 224, 184, .08); border: 1px solid rgba(0, 224, 184, .2);
  padding: .2em .6em; border-radius: 6px;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 50;
  background: rgba(8, 8, 10, .72); backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .3s, background .3s;
}
.nav.is-scrolled { border-bottom-color: var(--border); background: rgba(8, 8, 10, .92); }
.nav__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav__logo { font-family: var(--mono); font-weight: 600; color: var(--text); }
.nav__logo:hover { text-decoration: none; }
.nav__menu { display: flex; gap: 6px; align-items: center; }
.nav__link { color: var(--muted); padding: .45em .8em; border-radius: 8px; font-size: .93rem; font-weight: 500; }
.nav__link:hover, .nav__link.is-active { color: var(--text); text-decoration: none; background: rgba(0, 224, 184, .1); }
.nav__link--cta { color: var(--accent); border: 1px solid var(--accent); margin-left: 6px; }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; padding: 10px; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: .3s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center; overflow: hidden;
  padding: calc(var(--nav-h) + 40px) 0 60px;
  background:
    radial-gradient(ellipse at 15% 20%, rgba(0, 224, 184, .10), transparent 55%),
    radial-gradient(ellipse at 85% 80%, rgba(0, 224, 184, .06), transparent 55%),
    var(--bg);
}
#particles { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__inner { position: relative; display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.hero__prompt { color: var(--muted); margin-bottom: .4em; }
.hero__name { font-size: clamp(2.6rem, 7vw, 4.6rem); font-weight: 800; letter-spacing: -.02em; margin-bottom: .15em;
  background: linear-gradient(90deg, #fff 30%, var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__title { font-size: clamp(1.05rem, 2.2vw, 1.35rem); color: var(--accent); font-weight: 600; }
.hero__title .dot { color: var(--muted); }
.hero__objective { color: var(--muted); max-width: 58ch; font-size: 1.05rem; }
.hero__objective strong { color: var(--text); }
.hero__typing { color: var(--text); min-height: 1.6em; font-size: .95rem; }
.caret { color: var(--accent-2); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 18px; }
.hero__links { display: flex; gap: 8px; flex-wrap: wrap; }

.hero__photo { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.avatar {
  position: relative; width: min(320px, 70vw); aspect-ratio: 1; border-radius: 50%;
  padding: 6px; background: conic-gradient(from 180deg, var(--accent), #7dffe3, var(--accent));
  box-shadow: 0 0 60px rgba(0, 224, 184, .3);
}
.avatar img, .avatar__initials {
  width: 100%; height: 100%; border-radius: 50%; object-fit: cover; background: var(--surface);
}
.avatar img + .avatar__initials { display: none; }
.no-js .avatar img { display: none; }
.no-js .avatar img + .avatar__initials { display: grid; }
.avatar__initials { display: grid; place-items: center; font-size: 4rem; font-weight: 800; color: var(--accent); font-family: var(--mono); }
.status { display: inline-flex; align-items: center; gap: 8px; font-size: .88rem; color: var(--muted);
  border: 1px solid var(--border); padding: .4em 1em; border-radius: 999px; background: rgba(20, 20, 24, .7); }
.status__dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 0 rgba(34, 197, 94, .6); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); } 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); } }

/* ---------- Sections ---------- */
.section { padding: var(--section-pad) 0; scroll-margin-top: calc(var(--nav-h) + var(--nav-gap) - var(--section-pad)); }
.section--alt { background: var(--bg-alt); }
.section__head { margin-bottom: 44px; max-width: 70ch; }
.section__num { color: var(--accent-2); margin-bottom: .3em; }
.section__lead { color: var(--muted); }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; }
.about__bio p { color: var(--muted); }
.about__bio strong { color: var(--text); }
.facts { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 10px; }
.facts li { display: flex; gap: 14px; padding: 10px 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; font-size: .93rem; }
.facts .mono { min-width: 42px; }

.skills { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.skill, .project, .cert, .post {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; transition: transform .25s, border-color .25s, box-shadow .25s;
}
.skill { display: flex; flex-direction: column; }
.skill p { color: var(--muted); font-size: .9rem; }
.skill:hover, .project:hover, .cert:hover, .post:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow); }

/* ---------- Projects ---------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.project { display: flex; flex-direction: column; gap: 4px; }
.project--featured { grid-column: 1 / -1; background: linear-gradient(135deg, var(--surface-2), var(--surface)); }
.project p { color: var(--muted); font-size: .94rem; }
.project__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 10px; }
.project__type { font-size: .78rem; color: var(--muted); }
.project__meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 4px 0 16px; }
.project__meta dt { font-family: var(--mono); font-size: .75rem; color: var(--accent-2); text-transform: uppercase; letter-spacing: .05em; }
.project__meta dd { margin: 2px 0 0; font-size: .9rem; }
.project .tags { margin-bottom: 16px; }
.project__link { font-weight: 600; font-size: .92rem; }

.badge { font-size: .74rem; font-weight: 600; padding: .25em .7em; border-radius: 999px; }
.badge--forensics { background: rgba(167, 139, 250, .15); color: #c4b5fd; }
.badge--offense { background: rgba(248, 113, 113, .15); color: #fca5a5; }
.badge--soc { background: rgba(0, 224, 184, .15); color: #93c5fd; }
.badge--lab { background: rgba(0, 224, 184, .13); color: var(--accent-2); }
.badge--network { background: rgba(255, 181, 71, .14); color: var(--warn); }

/* ---------- Certifications & Education ---------- */
.certs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 28px; }
.cert__status { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; padding: .25em .7em; border-radius: 6px; margin-bottom: 12px; }
.cert__status--done { background: rgba(34, 197, 94, .14); color: #4ade80; }
.cert__status--progress { background: rgba(255, 181, 71, .14); color: var(--warn); }
.cert__issuer { color: var(--muted); font-size: .9rem; }
.cert__verify { font-size: .88rem; font-weight: 600; }
.progress { height: 6px; background: var(--bg); border-radius: 99px; overflow: hidden; }
.progress span { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), #7dffe3); }

.edu { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.edu > div { padding: 26px; }
.edu__main { border-right: 1px solid var(--border); }
.edu__prev { border-top: 1px solid var(--border); border-right: 1px solid var(--border); }
.edu__prev + .edu__modules { border-top: 1px solid var(--border); }
.edu__prev:last-child { grid-column: 1 / -1; border-right: 0; }
.edu__main p:last-child { color: var(--muted); font-size: .92rem; }
.modules { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.modules li { font-size: .85rem; padding: .3em .8em; border: 1px solid var(--border); border-radius: 8px; color: var(--muted); }

/* ---------- Write-ups ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.filter { font-family: inherit; font-size: .88rem; background: transparent; color: var(--muted); border: 1px solid var(--border); padding: .45em 1em; border-radius: 999px; cursor: pointer; transition: .2s; }
.filter:hover { color: var(--text); border-color: var(--accent); }
.filter.is-active { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.post { display: flex; flex-direction: column; color: var(--text); }
.post:hover { text-decoration: none; }
.post p { color: var(--muted); font-size: .92rem; }
.post__cat { font-family: var(--mono); font-size: .75rem; color: var(--accent-2); margin-bottom: 10px; }
.post__meta { margin-top: auto; font-size: .78rem; color: var(--muted); }
.post.is-hidden { display: none; }

/* ---------- Contact ---------- */
.contact { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: start; }
.contact__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.contact__list li { display: grid; grid-template-columns: 88px 1fr; gap: 12px; align-items: center; padding: 14px 18px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
.contact__list .mono { font-size: .82rem; }
.contact__value { color: var(--text); word-break: break-word; font-size: .95rem; }
a.contact__value:hover { color: var(--accent); }

.form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.form__row { margin-bottom: 16px; }
.form label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--muted); }
.form input, .form textarea {
  width: 100%; padding: .8em 1em; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 10px; font: inherit; font-size: .95rem; resize: vertical;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 224, 184, .2); }
.form .hp { position: absolute; left: -9999px; }
.form__status { margin: 12px 0 0; font-size: .9rem; min-height: 1.4em; }
.form__status.ok { color: #4ade80; }
.form__status.err { color: #fca5a5; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: .88rem; }
.footer__inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer p { margin: 0; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero__inner, .about, .contact { grid-template-columns: 1fr; }
  .hero__photo { order: -1; }
  .avatar { width: 200px; }
  .certs, .posts { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .nav__toggle { display: block; }
  .nav__menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--bg); border-bottom: 1px solid var(--border); padding: 12px 16px 20px; gap: 4px;
    transform: translateY(-120%); transition: transform .3s; visibility: hidden;
  }
  .nav__menu.is-open { transform: none; visibility: visible; }
  .nav__link { padding: .8em 1em; }
  .nav__link--cta { margin: 6px 0 0; text-align: center; }
  .nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  :root { --section-pad: 72px; }
  .skills, .projects, .certs, .posts, .project__meta { grid-template-columns: 1fr; }
  .edu { grid-template-columns: 1fr; }
  .edu__main { border-right: 0; border-bottom: 1px solid var(--border); }
  .edu__prev { border-right: 0; }
  .edu__prev + .edu__modules { border-top: 0; padding-top: 0; }
  .contact__list li { grid-template-columns: 1fr; gap: 2px; }
  .hero__actions .btn { flex: 1 1 auto; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Write-up pages ---------- */
.article { max-width: 780px; padding: calc(var(--nav-h) + 48px) 0 80px; }
.article__back { font-size: .9rem; font-weight: 600; }
.article__head { margin: 22px 0 32px; }
.article__head h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); letter-spacing: -.02em; }
.article__meta { color: var(--muted); font-size: .82rem; }
.article h2 { font-size: 1.35rem; margin-top: 2em; }
.article p, .article li { color: #c9c9d3; }
.article ul { padding-left: 1.2em; }
.summary { background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent-2); border-radius: var(--radius); padding: 20px 24px; }
.summary h2 { margin-top: 0; font-size: 1rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent-2); }
.summary p { margin: 0; }
pre { background: #050506; border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; overflow-x: auto; }
code { font-family: var(--mono); font-size: .86rem; color: #a5f3e1; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 520px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-family: var(--mono); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--accent-2); }
figure { margin: 1.5em 0; }
figure img { border: 1px solid var(--border); border-radius: 10px; }
figcaption { font-size: .82rem; color: var(--muted); margin-top: 6px; }
.note { margin-top: 2.5em; padding: 16px 20px; border: 1px solid rgba(255, 181, 71, .35); background: rgba(255, 181, 71, .07); border-radius: 10px; font-size: .9rem; color: #e9d5b0; }
@media (max-width: 760px) {
  .nav__menu--static { position: static; flex-direction: row; transform: none; visibility: visible; padding: 0; border: 0; background: none; }
  .nav__menu--static .nav__link { padding: .4em .5em; font-size: .85rem; }
  .nav__menu--static .nav__link--cta { display: none; }
}