/* ===================================================================
   Abel Maldonado — portfolio
   Dark default, light override via [data-theme="light"]
   =================================================================== */
:root,
:root[data-theme="dark"] {
  --bg:        #0a0c10;
  --bg-soft:   #0f131a;
  --panel:     #12171f;
  --panel-2:   #161c26;
  --border:    #232b38;
  --border-2:  #2c3542;
  --text:      #e8edf4;
  --text-dim:  #9aa7b8;
  --text-mute: #64707f;
  --accent:    #5eead4;
  --accent-2:  #7cff9b;
  --accent-ink:#04110d;
  --shadow:    0 1px 0 rgba(255,255,255,.02), 0 20px 40px -24px rgba(0,0,0,.7);
}

:root[data-theme="light"] {
  --bg:        #f7f8fa;
  --bg-soft:   #ffffff;
  --panel:     #ffffff;
  --panel-2:   #f2f4f7;
  --border:    #e2e6ec;
  --border-2:  #d3d9e2;
  --text:      #10151c;
  --text-dim:  #4a5563;
  --text-mute: #8a95a3;
  --accent:    #0d9488;
  --accent-2:  #059669;
  --accent-ink:#ffffff;
  --shadow:    0 1px 2px rgba(16,21,28,.04), 0 18px 40px -28px rgba(16,21,28,.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(60rem 40rem at 80% -10%, rgba(94,234,212,.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { width: min(1120px, 92vw); margin-inline: auto; }

a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }

.marker, .card__idx, .repo__name, .repo__lang, .repo__cta,
.repo__badge, .htb-stat__k, .contact__k, .hero__eyebrow, .card__kind,
.stats__num, .paper__meta, .footer, .card .tags li, .stack__list li {
  font-family: "JetBrains Mono", ui-monospace, monospace;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.inline-link { color: var(--accent); border-bottom: 1px solid transparent; transition: border-color .15s; }
.inline-link:hover { border-color: var(--accent); }

/* ===================== NAV ===================== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav__inner { display: flex; align-items: center; gap: 1.5rem; height: 64px; }
.nav__brand { display: flex; align-items: center; gap: .6rem; margin-right: auto; }
.nav__brand-logo { height: 30px; width: auto; display: block; }
/* logo art is white; keep it white on dark, flip to black in light mode */
:root[data-theme="light"] .nav__brand-logo { filter: invert(1); }
.nav__brand-name { font-weight: 600; letter-spacing: -.01em; }
.nav__links { display: flex; gap: 1.5rem; }
.nav__links a { color: var(--text-dim); font-size: .92rem; font-weight: 500; transition: color .15s; }
.nav__links a:hover { color: var(--text); }
.nav__actions { display: flex; align-items: center; gap: .7rem; }

.icon-btn {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid var(--border); border-radius: 9px; background: var(--panel);
  color: var(--text-dim); cursor: pointer; transition: color .15s, border-color .15s;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-2); }
.icon-sun { display: none; }
:root[data-theme="light"] .icon-sun { display: block; }
:root[data-theme="light"] .icon-moon { display: none; }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .62rem 1.05rem; border-radius: 9px; font-weight: 600; font-size: .92rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .12s, background .15s, border-color .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn--solid { background: var(--accent); color: var(--accent-ink); }
.btn--solid:hover { background: var(--accent-2); }
.btn--ghost { background: transparent; border-color: var(--border-2); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ===================== HERO ===================== */
.hero { padding: 5.5rem 0 2.6rem; }
.hero__eyebrow {
  color: var(--accent); font-size: .8rem; letter-spacing: .12em; text-transform: uppercase;
  margin: 0 0 1.4rem;
}
.hero__title {
  font-size: clamp(2.3rem, 5.6vw, 4rem);
  font-weight: 700; letter-spacing: -.035em; margin-bottom: 1.8rem;
}
.hero__title .accent { color: var(--accent); }
.hero__lead { max-width: 68ch; color: var(--text-dim); font-size: 1.08rem; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.2rem; }

/* ===================== STATS ===================== */
.stats {
  list-style: none; margin: 1rem 0 0; padding: 1.8rem 0;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
}
.stats li { display: flex; flex-direction: column; gap: .3rem; align-items: flex-start; }
.stats__num { color: var(--accent); font-size: clamp(1.8rem, 3.4vw, 2.5rem); font-weight: 600; line-height: 1; }
.stats__label { color: var(--text-mute); font-size: .82rem; }

/* ===================== SECTIONS ===================== */
.section { padding: 3.4rem 0; }
.section__head { display: flex; flex-direction: column; gap: .55rem; }
.section__head--full { margin-bottom: 2.2rem; }
.marker { color: var(--accent); font-size: .82rem; letter-spacing: .08em; }
.section h2 { font-size: clamp(1.6rem, 3.4vw, 2.1rem); font-weight: 700; }
.section__note { color: var(--text-dim); margin: -1.4rem 0 2rem; max-width: 66ch; }

/* ===================== CARDS ===================== */
.cards { display: grid; gap: 1.1rem; }
.cards--focus, .cards--work { grid-template-columns: repeat(2, 1fr); }

.card {
  position: relative; padding: 1.5rem 1.5rem 1.6rem;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); transition: border-color .18s, transform .18s;
}
.card:hover { border-color: var(--border-2); transform: translateY(-2px); }
.card__idx { color: var(--accent); font-size: .8rem; margin-bottom: .8rem; }
.card h3 { font-size: 1.18rem; margin-bottom: .6rem; }
.card p { color: var(--text-dim); font-size: .95rem; margin: 0 0 1.1rem; }

.card--work .card__top { margin-bottom: .7rem; }
.card--work h3 { color: var(--accent); letter-spacing: -.01em; }
.card__kind { display: block; color: var(--text-mute); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; margin-top: .2rem; }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.tags li {
  font-size: .72rem; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 6px; padding: .2rem .5rem;
  background: var(--bg-soft);
}

/* ===================== OPEN SOURCE ===================== */
.repos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.repo {
  display: flex; flex-direction: column; padding: 1.4rem;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); transition: border-color .18s, transform .18s;
}
.repo:hover { border-color: var(--accent); transform: translateY(-2px); }
.repo--featured { border-color: var(--border-2); background:
  radial-gradient(30rem 16rem at 100% 0%, rgba(124,255,155,.06), transparent 55%), var(--panel); }
.repo__head { display: flex; align-items: center; justify-content: space-between; gap: .6rem; margin-bottom: .7rem; }
.repo__name { color: var(--text); font-size: 1rem; font-weight: 600; }
.repo__lang {
  font-size: .68rem; color: var(--text-dim); border: 1px solid var(--border);
  border-radius: 999px; padding: .16rem .55rem; white-space: nowrap;
}
.repo__lang[data-lang="rust"]   { color: #ff9d6e; border-color: #ff9d6e40; }
.repo__lang[data-lang="python"] { color: #6ea8ff; border-color: #6ea8ff40; }
.repo__lang[data-lang="shell"]  { color: #7cff9b; border-color: #7cff9b40; }
.repo__desc { color: var(--text-dim); font-size: .9rem; margin: 0 0 1.1rem; flex: 1; }
.repo__cta { color: var(--accent); font-size: .74rem; letter-spacing: .04em; }
.repo__badge {
  align-self: flex-start; color: var(--accent-2); font-size: .68rem; letter-spacing: .05em;
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, transparent); border-radius: 999px; padding: .18rem .55rem;
}

/* ===================== STACK ===================== */
.stack { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.stack__cat {
  padding: 1.4rem; background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: var(--shadow);
}
.stack__cat h3 {
  font-size: .82rem; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1rem; font-family: "JetBrains Mono", monospace; font-weight: 600;
}
.stack__list { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.stack__list li {
  font-size: .74rem; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 6px; padding: .24rem .55rem;
  background: var(--bg-soft);
}

/* ===================== RESEARCH ===================== */
.paper {
  display: flex; align-items: stretch; gap: 1.4rem;
  padding: 1.6rem 1.8rem; border: 1px solid var(--border); border-radius: 16px;
  background: var(--panel); box-shadow: var(--shadow); transition: border-color .18s, transform .18s;
}
.paper:hover { border-color: var(--accent); transform: translateY(-2px); }
.paper__meta { display: block; color: var(--text-mute); font-size: .74rem; letter-spacing: .04em; margin-bottom: .5rem; }
.paper__body h3 { font-size: 1.25rem; margin-bottom: .6rem; }
.paper__body p { color: var(--text-dim); font-size: .94rem; margin: 0 0 1rem; max-width: 70ch; }
.paper__cta { color: var(--accent); font-weight: 600; font-size: .88rem; }
.paper__side { display: grid; place-items: start center; color: var(--accent); padding-top: .3rem; }

/* ===================== HTB ===================== */
.htb-card {
  display: grid; grid-template-columns: 1fr 300px; gap: 2rem; align-items: center;
  padding: 2.2rem; border: 1px solid var(--border); border-radius: 16px;
  background:
    radial-gradient(40rem 20rem at 100% 0%, rgba(124,255,155,.06), transparent 55%),
    var(--panel);
  box-shadow: var(--shadow);
}
.htb-card h2 { font-size: 1.7rem; margin: .4rem 0 .8rem; }
.htb-card p { color: var(--text-dim); margin: 0 0 1.4rem; max-width: 58ch; }
.htb-card__actions { display: flex; flex-wrap: wrap; gap: .7rem; }
.htb-card__right { display: flex; flex-direction: column; gap: .8rem; }
.htb-stat {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: .8rem 1rem; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-soft);
}
.htb-stat__k { color: var(--text-mute); font-size: .76rem; letter-spacing: .04em; text-transform: uppercase; }
.htb-stat__v { color: var(--accent); font-weight: 600; }

/* ===================== CREDS ===================== */
.creds { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.creds__h { color: var(--text); font-size: 1.05rem; margin: 0 0 .9rem; }
.creds__col > .creds__h + .creds__list { margin-bottom: 1.6rem; }
.creds__list { list-style: none; margin: 0; padding: 0; }
.creds__list li {
  display: flex; flex-direction: column; gap: .1rem;
  padding: .7rem 0; border-top: 1px solid var(--border);
}
.creds__list li span { font-weight: 600; display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.creds__list li em { color: var(--text-mute); font-style: normal; font-size: .86rem; }
.creds__badge {
  font-family: "JetBrains Mono", monospace; font-weight: 500; font-size: .64rem;
  letter-spacing: .05em; text-transform: uppercase; color: var(--accent-2);
  border: 1px solid color-mix(in srgb, var(--accent-2) 40%, transparent);
  border-radius: 999px; padding: .12rem .5rem;
}

/* ===================== CONTACT ===================== */
.contact__links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.contact__link {
  display: flex; align-items: center; gap: .9rem;
  padding: 1.1rem 1.3rem; border: 1px solid var(--border); border-radius: 12px;
  background: var(--panel); transition: border-color .18s, transform .18s;
}
.contact__link:hover { border-color: var(--accent); transform: translateY(-2px); }
.contact__icon { color: var(--accent); flex-shrink: 0; }
.contact__text { display: flex; flex-direction: column; gap: .2rem; min-width: 0; }
.contact__k { color: var(--text-mute); font-size: .74rem; letter-spacing: .05em; text-transform: uppercase; }
.contact__v { font-weight: 600; overflow: hidden; text-overflow: ellipsis; }

/* ===================== FOOTER ===================== */
.footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 2.4rem 0 3rem; margin-top: 2rem; border-top: 1px solid var(--border);
  color: var(--text-mute); font-size: .82rem;
}
.footer__top { color: var(--text-dim); transition: color .15s; }
.footer__top:hover { color: var(--accent); }

/* ===================== REVEAL ===================== */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 900px) {
  .stack, .repos { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 1.6rem; }
}
@media (max-width: 760px) {
  .nav__links { display: none; }
  .cards--focus, .cards--work, .stack, .repos { grid-template-columns: 1fr; }
  .htb-card { grid-template-columns: 1fr; }
  .creds, .contact__links { grid-template-columns: 1fr; }
  .paper { flex-direction: column; }
  .paper__side { display: none; }
}
@media (max-width: 480px) {
  .nav__brand-name { display: none; }
}