/* ================================================================================
   tty503.com — design system: TERMINAL (minimalista, monospace, fácil)
   ================================================================================ */
:root {
  --bg: #0b0f0d;
  --panel: #0f1512;
  --panel-2: #131a17;
  --line: #22312a;
  --line-strong: #33483d;
  --text: #d9ffe7;
  --text-dim: #a3c3b2;
  --text-mute: #68857a;
  --green: #4ade80;
  --green-dim: #2ea35c;
  --amber: #fbbf24;
  --red: #ff7b72;
  --cyan: #67e8f9;
  --sel: #123524;
  --radius: 0;
  --radius-sm: 0;
  --font: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 56px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg); color: var(--text); font-family: var(--font);
  font-size: 15.5px; line-height: 1.7; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
::selection { background: var(--green); color: #07130c; }
a { color: var(--green); text-decoration: none; transition: color 0.15s var(--ease); }
a:hover { color: var(--text); text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; height: auto; }
.mono, code, pre, kbd { font-family: var(--font); }
h1, h2, h3 { font-family: var(--font); }
hr { border: 0; border-top: 1px dashed var(--line); margin: 2.4rem 0; }

/* Fondo: nada de gradientes; solo malla de puntos CRT sutil */
.bg-fx {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: radial-gradient(rgba(74, 222, 128, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black, transparent 85%);
}

/* ============ NAV (barra de terminal) ============ */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h); display: flex; align-items: center;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.nav-inner {
  width: min(1024px, 94vw); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font); font-size: 0.95rem; font-weight: 700; color: var(--text);
  letter-spacing: -0.02em;
}
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }
.brand .sub { color: var(--text-mute); font-weight: 400; font-size: 0.78rem; }
.nav-links { display: flex; align-items: center; gap: 1.1rem; }
.nav-links a { color: var(--text-dim); font-size: 0.84rem; font-weight: 500; }
.nav-links a:hover { color: var(--green); text-decoration: none; }
.nav-links .cta {
  padding: 0.38rem 0.9rem; border: 1px solid var(--line-strong); color: var(--green);
  background: var(--panel-2);
}
.nav-links .cta:hover { background: var(--green); color: #07130c; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--text); font-size: 1.1rem; cursor: pointer; padding: 0.1rem 0.5rem; }

/* ============ HERO ============ */
.hero {
  min-height: 88vh; display: flex; align-items: center;
  padding: calc(var(--nav-h) + 3rem) 3vw 3rem;
}
.hero-inner { width: min(1024px, 94vw); margin: 0 auto; }
.hero .kicker {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--font); font-size: 0.84rem; color: var(--text-dim);
  border: 1px solid var(--line); background: var(--panel); padding: 0.4rem 0.8rem;
}
.hero .kicker .blink { color: var(--green); animation: blink 1.2s steps(2) infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.hero h1 {
  font-size: clamp(2.1rem, 5.4vw, 3.6rem); font-weight: 700; line-height: 1.05;
  letter-spacing: -0.02em; margin: 1.1rem 0 1.2rem;
}
.hero h1 .grad { color: var(--green); }
.hero .lead { max-width: 640px; color: var(--text-dim); font-size: 1rem; line-height: 1.75; margin-bottom: 1.8rem; }
.hero .lead b, .hero .lead strong { color: var(--text); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.7rem; align-items: center; margin-bottom: 1.8rem; }

/* ============ Avatar (foto de perfil en marco terminal) ============ */
.avatar {
  display: block; width: 104px; height: 104px; object-fit: cover;
  border-radius: 50%; border: 1px solid var(--green-dim);
  outline: 1px dashed var(--line-strong); outline-offset: 4px;
  margin-bottom: 1.5rem; background: var(--panel-2);
}
.post-head .avatar { width: 84px; height: 84px; }

/* ============ BOTONES ============ */
.btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  padding: 0.56rem 1.05rem; font-size: 0.86rem; font-weight: 600; font-family: var(--font);
  border: 1px solid var(--line-strong); background: var(--panel); color: var(--text);
  cursor: pointer; transition: all 0.15s var(--ease); text-decoration: none;
}
.btn:hover { transform: translateY(-1px); border-color: var(--green); color: var(--green); text-decoration: none; }
.btn-primary { background: var(--green); border-color: var(--green); color: #07130c; }
.btn-primary:hover { color: #07130c; filter: brightness(1.1); }
.btn-ghost { background: transparent; }

/* ============ CHIPS ============ */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  font-family: var(--font); font-size: 0.72rem; color: var(--text-dim);
  padding: 0.3rem 0.75rem; border: 1px solid var(--line); background: var(--panel);
}
.chip:hover { border-color: var(--green); color: var(--green); }
.chip.on { background: var(--sel); border-color: var(--green); color: var(--green); }

/* ============ STATS ============ */
.stats {
  width: min(1024px, 94vw); margin: 0 auto 2.5rem;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  border: 1px solid var(--line); background: var(--line);
}
.stat { background: var(--panel); padding: 1.1rem 1.3rem; display: flex; flex-direction: column; gap: 0.25rem; }
.stat .num { font-size: 1.6rem; font-weight: 700; color: var(--green); }
.stat .num::before { content: "$ "; font-weight: 400; color: var(--text-mute); font-size: 1rem; }
.stat .lbl { font-size: 0.68rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.1em; }

/* ============ SECCIONES & CARDS ============ */
.section { padding: 4.5rem 3vw; }
.section-inner { width: min(1024px, 94vw); margin: 0 auto; }
.sec-head { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 2.2rem; }
.sec-eyebrow {
  font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--green);
}
.sec-eyebrow::before { content: "# "; color: var(--text-mute); }
.sec-title { font-size: clamp(1.35rem, 2.8vw, 1.9rem); font-weight: 700; letter-spacing: -0.01em; }
.sec-sub { color: var(--text-dim); max-width: 620px; font-size: 0.9rem; }

.grid { display: grid; gap: 1px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative; display: flex; flex-direction: column; gap: 0.55rem;
  background: var(--panel); border: 1px solid var(--line); padding: 1.2rem 1.3rem;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.card:hover { border-color: var(--green-dim); background: var(--panel-2); }
.card .t { font-size: 1rem; font-weight: 700; color: var(--text); }
.card .t::before { content: "> "; color: var(--green); }
.card .d { color: var(--text-dim); font-size: 0.82rem; line-height: 1.62; flex: 1; }
.card .meta { font-size: 0.68rem; color: var(--text-mute); display: flex; gap: 0.8rem; flex-wrap: wrap; }
.card .arrow { position: absolute; top: 1.1rem; right: 1.1rem; color: var(--text-mute); transition: transform 0.2s var(--ease), color 0.2s var(--ease); }
.card:hover .arrow { transform: translate(3px, -3px); color: var(--green); }

.badge {
  align-self: flex-start; font-size: 0.62rem; letter-spacing: 0.05em;
  padding: 0.18rem 0.5rem; border: 1px solid; vertical-align: middle;
}
.badge-rce { color: var(--red); border-color: var(--red); }
.badge-dos { color: var(--amber); border-color: var(--amber); }
.badge-ti { color: var(--cyan); border-color: var(--cyan); }
.badge-infra { color: var(--green); border-color: var(--green); }
.badge-guide { color: var(--text-dim); border-color: var(--line-strong); }

/* ============ EXPERIENCIA (tl) ============ */
.tl { display: flex; flex-direction: column; gap: 1px; border: 1px solid var(--line); background: var(--line); }
.tl-item { display: grid; grid-template-columns: 1.1fr 2.2fr; gap: 1rem; padding: 1rem 1.2rem; background: var(--panel); }
.tl-item:hover { background: var(--panel-2); }
.tl-item .org { font-size: 0.68rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.tl-item .role { font-size: 0.95rem; font-weight: 700; margin: 0.15rem 0 0.05rem; }
.tl-item .range { font-size: 0.72rem; color: var(--green); }
.tl-item .what { color: var(--text-dim); font-size: 0.82rem; }
.tl-item .what b { color: var(--text); font-weight: 600; }

/* ============ POST ============ */
.post {
  width: min(720px, 94vw); margin: 0 auto; padding: calc(var(--nav-h) + 2.6rem) 0 3rem;
}
.breadcrumb {
  display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center;
  font-size: 0.72rem; color: var(--text-mute); margin-bottom: 1.4rem;
}
.breadcrumb a { color: var(--text-mute); }
.breadcrumb a:hover { color: var(--green); }
.breadcrumb .sep { opacity: 0.5; }
.post-head { margin-bottom: 2rem; padding-bottom: 1.8rem; border-bottom: 1px dashed var(--line); }
.post-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 1rem; }
.post-tags .chip { font-size: 0.64rem; }
.post-head h1 { font-size: clamp(1.5rem, 3.6vw, 2.1rem); font-weight: 700; letter-spacing: -0.01em; line-height: 1.15; margin-bottom: 0.9rem; }
.post-head .lede { color: var(--text-dim); font-size: 0.95rem; line-height: 1.7; }
.post-head .lede b, .post-head .lede strong { color: var(--text); }
.post-meta { display: flex; flex-wrap: wrap; gap: 1.1rem; margin-top: 1rem; font-size: 0.72rem; color: var(--text-mute); }
.post-meta span { display: inline-flex; align-items: center; gap: 0.35rem; }
.post-meta span::before { content: "•"; color: var(--green); }

/* TL;DR */
.tldr {
  border: 1px solid var(--green-dim); border-left: 4px solid var(--green);
  background: var(--panel); padding: 1.1rem 1.3rem; margin: 0 0 1.8rem;
}
.tldr .h { font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--green); margin-bottom: 0.6rem; }
.tldr .h::before { content: "$ cat resumen.txt "; color: var(--text-mute); }
.tldr ul { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.tldr li { color: var(--text-dim); font-size: 0.85rem; padding-left: 1.1rem; position: relative; }
.tldr li::before { content: "› "; position: absolute; left: 0; color: var(--green); }
.tldr li b { color: var(--text); }

.post-body h2 {
  font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em;
  margin: 2.2rem 0 0.9rem; padding-top: 0.3rem; scroll-margin-top: calc(var(--nav-h) + 1rem);
}
.post-body h2::after { content: " //"; color: var(--text-mute); font-size: 0.7rem; }
.post-body h2 .idx { font-size: 0.78rem; color: var(--green); margin-right: 0.55rem; font-weight: 500; }
.post-body h3 { font-size: 0.98rem; font-weight: 700; margin: 1.6rem 0 0.6rem; }
.post-body h3::before { content: "» "; color: var(--green); }
.post-body p { color: var(--text-dim); margin-bottom: 0.95rem; font-size: 0.9rem; }
.post-body p b, .post-body p strong { color: var(--text); font-weight: 600; }
.post-body ul, .post-body ol { color: var(--text-dim); margin: 0 0 1.1rem 1.2rem; font-size: 0.88rem; }
.post-body li { margin-bottom: 0.35rem; }
.post-body li::marker { color: var(--green); }

/* Código */
.code-wrap { position: relative; margin: 1.2rem 0; }
.code-wrap .lang {
  position: absolute; top: 0; left: 0;
  font-size: 0.6rem; letter-spacing: 0.12em; color: var(--text-mute);
  background: var(--panel-2); border: 1px solid var(--line); border-bottom: 0; padding: 0.25rem 0.6rem;
}
.code-wrap .copy-btn {
  position: absolute; top: 0.4rem; right: 0.4rem; z-index: 2;
  font-size: 0.66rem; color: var(--text-mute); background: var(--panel-2);
  border: 1px solid var(--line); padding: 0.25rem 0.5rem; cursor: pointer; transition: all 0.15s var(--ease);
}
.code-wrap .copy-btn:hover { color: var(--green); border-color: var(--green); }
pre.code {
  background: #070a08; border: 1px solid var(--line); padding: 1rem 1.1rem;
  overflow-x: auto; font-size: 0.78rem; line-height: 1.65; color: var(--text-dim); tab-size: 4;
}
.syn-c { color: #5c7d6c; }
.syn-k { color: #67e8f9; }
.syn-f { color: #ffd77d; }
.syn-s { color: #a5f3a5; }
.syn-n { color: #ff7b72; }

/* Tablas */
.tbl-wrap { overflow-x: auto; margin: 1.2rem 0; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
thead th {
  text-align: left; font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-dim); background: var(--panel-2); padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--line-strong); white-space: nowrap;
}
th, td { font-weight: 400; }
tbody td { padding: 0.6rem 0.9rem; color: var(--text-dim); border-bottom: 1px solid var(--line); vertical-align: top; }
tbody th { padding: 0.6rem 0.9rem; text-align: left; color: var(--text-mute); font-weight: 400; white-space: nowrap; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td, tbody tr:hover th { background: var(--panel-2); }

/* Callouts */
.callout { display: flex; gap: 0.8rem; border-radius: 0; padding: 0.9rem 1.1rem; margin: 1.2rem 0; border: 1px solid var(--line); border-left-width: 4px; background: var(--panel); }
.callout .ico { font-size: 1rem; line-height: 1.4; }
.callout .h { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.25rem; }
.callout p, .callout li { color: var(--text-dim); font-size: 0.85rem; }
.callout-ok { border-left-color: var(--green); } .callout-ok .h { color: var(--green); } .callout-ok .ico { color: var(--green); }
.callout-warn { border-left-color: var(--amber); } .callout-warn .h { color: var(--amber); } .callout-warn .ico { color: var(--amber); }
.callout-info { border-left-color: var(--cyan); } .callout-info .h { color: var(--cyan); } .callout-info .ico { color: var(--cyan); }
.callout-danger { border-left-color: var(--red); } .callout-danger .h { color: var(--red); } .callout-danger .ico { color: var(--red); }

/* Figuras */
.figure { margin: 1.4rem 0; }
.figure img { border: 1px solid var(--line); }
.figcap { font-size: 0.7rem; color: var(--text-mute); text-align: center; margin-top: 0.5rem; }

/* Cita & kbd */
blockquote { border-left: 3px solid var(--green); background: var(--panel); padding: 0.9rem 1.1rem; margin: 1.2rem 0; color: var(--text-dim); font-size: 0.88rem; }
blockquote b, blockquote strong { color: var(--text); }
kbd {
  font-size: 0.75rem; padding: 0.1rem 0.4rem; border: 1px solid var(--line-strong);
  border-bottom-width: 2px; background: var(--panel-2); color: var(--text-dim);
}

/* TOC */
.toc-card { margin: 1.6rem 0 2rem; border: 1px solid var(--line); background: var(--panel); }
.toc-card summary {
  list-style: none; cursor: pointer; user-select: none;
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.85rem 1.1rem; font-size: 0.8rem; color: var(--text-dim);
}
.toc-card summary::-webkit-details-marker { display: none; }
.toc-card summary:hover { color: var(--text); }
.toc-card summary .tw { color: var(--green); }
.toc-card[open] summary { border-bottom: 1px solid var(--line); }
.toc-card ol { padding: 0.7rem 1.1rem 0.9rem 2.2rem; color: var(--text-dim); font-size: 0.78rem; display: grid; gap: 0.35rem; }
.toc-card ol a { color: var(--text-dim); }
.toc-card ol a:hover { color: var(--green); }

/* Related */
.related { margin-top: 2.6rem; border-top: 1px dashed var(--line); padding-top: 1.8rem; }
.related h2 { font-size: 1.05rem; margin-bottom: 1.1rem; }
.related .grid-2 .card { padding: 0.95rem 1.1rem; }

/* ============ FOOTER ============ */
.site-footer { border-top: 1px solid var(--line); padding: 2.6rem 3vw; margin-top: 2rem; background: var(--panel); }
.footer-inner { width: min(1024px, 94vw); margin: 0 auto; display: flex; flex-direction: column; align-items: center; gap: 1rem; text-align: center; }
.social { display: flex; gap: 1.1rem; flex-wrap: wrap; justify-content: center; }
.social a {
  font-size: 0.8rem; color: var(--text-dim); padding: 0.35rem 0.85rem;
  border: 1px solid var(--line-strong); background: var(--panel-2);
}
.social a:hover { color: var(--green); border-color: var(--green); }
.footer-note { color: var(--text-mute); font-size: 0.75rem; }
.footer-note a { color: var(--text-mute); text-decoration: underline; text-underline-offset: 3px; }

/* Back to top */
.to-top {
  position: fixed; right: 1.4rem; bottom: 1.4rem; z-index: 90;
  width: 40px; height: 40px; display: grid; place-items: center; cursor: pointer;
  background: var(--panel-2); color: var(--text-dim); border: 1px solid var(--line-strong);
  font-size: 1rem; opacity: 0; pointer-events: none; transition: all 0.25s var(--ease);
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { color: var(--green); border-color: var(--green); transform: translateY(-2px); }

/* Reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* 404 terminal */
.err { min-height: 86vh; display: grid; place-items: center; padding: calc(var(--nav-h) + 2rem) 3vw 3rem; }
.err-inner { text-align: left; max-width: 620px; width: 94vw; }
.err-code { font-size: clamp(3.4rem, 12vw, 6rem); font-weight: 800; line-height: 1; color: var(--red); }
.err-code::before { content: "> "; color: var(--text-mute); font-weight: 400; }
.err h1 { font-size: 1.3rem; margin: 0.6rem 0 0.8rem; }
.err p { color: var(--text-dim); margin-bottom: 1.4rem; font-size: 0.9rem; }
.err .mono { color: var(--green); }

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .tl-item { grid-template-columns: 1fr; gap: 0.4rem; }
}
@media (max-width: 640px) {
  .nav-links { display: none; position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 0.5rem 3vw 0.9rem; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.6rem 0; border-bottom: 1px solid var(--line); }
  .nav-links a:last-child { border-bottom: 0; }
  .nav-toggle { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 3rem 1rem; }
  .hero { padding-top: calc(var(--nav-h) + 1.8rem); }
}