/* ==========================================================================
   ruvelro.github.io — hoja de estilos única
   Sin dependencias, sin build. Modo claro/oscuro automático + conmutador.
   ========================================================================== */

:root {
  color-scheme: light dark;

  --ink:        #16181d;
  --ink-soft:   #5b6472;
  --ink-faint:  #8b95a3;
  --bg:         #fbfbfa;
  --bg-soft:    #f2f2f0;
  --line:       #e3e3e0;
  --accent:     #0a66c2;
  --accent-2:   #00875a;

  --measure: 46rem;
  --step--1: clamp(.82rem, .8rem + .1vw, .89rem);
  --step-0:  clamp(1rem, .96rem + .18vw, 1.08rem);
  --step-1:  clamp(1.15rem, 1.08rem + .3vw, 1.3rem);
  --step-2:  clamp(1.5rem, 1.3rem + .8vw, 2rem);
  --step-3:  clamp(2rem, 1.6rem + 1.8vw, 3.2rem);

  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:       #e8eaed;
    --ink-soft:  #a3adba;
    --ink-faint: #6d7681;
    --bg:        #0f1115;
    --bg-soft:   #171a20;
    --line:      #262a32;
    --accent:    #59a5f5;
    --accent-2:  #3ecf9a;
  }
}
:root[data-theme="dark"] {
  --ink:       #e8eaed;
  --ink-soft:  #a3adba;
  --ink-faint: #6d7681;
  --bg:        #0f1115;
  --bg-soft:   #171a20;
  --line:      #262a32;
  --accent:    #59a5f5;
  --accent-2:  #3ecf9a;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.2rem, 5vw, 2rem) 4rem;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { max-width: var(--measure); margin-inline: auto; }

/* --- enlaces ------------------------------------------------------------ */
a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .15s ease, border-color .15s ease;
}
a:hover, a:focus-visible { color: var(--accent); border-bottom-color: currentColor; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* --- cabecera ----------------------------------------------------------- */
.top {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; margin-bottom: clamp(2.5rem, 8vw, 4.5rem);
}
.top nav { display: flex; align-items: center; gap: 1rem; font-size: var(--step--1); }
.top nav a, .top nav button { color: var(--ink-soft); }
.mark { font-family: var(--mono); font-size: var(--step--1); color: var(--ink-faint); border: 0; }

.theme {
  font: inherit; font-size: var(--step--1); color: var(--ink-soft);
  background: none; border: 1px solid var(--line); border-radius: 999px;
  padding: .15rem .7rem; cursor: pointer;
}
.theme:hover { color: var(--accent); border-color: currentColor; }

h1 {
  font-size: var(--step-3); line-height: 1.05; letter-spacing: -.03em;
  font-weight: 650; margin: 0 0 .6rem;
}
.role { font-size: var(--step-1); color: var(--ink); margin: 0 0 .35rem; font-weight: 500; }
.role b { font-weight: 650; }
.place { color: var(--ink-faint); font-size: var(--step--1); margin: 0 0 2rem; }

.lede { font-size: var(--step-1); line-height: 1.55; color: var(--ink-soft); margin: 0 0 1.2rem; max-width: 40rem; }
.lede strong { color: var(--ink); font-weight: 600; }

/* --- secciones ---------------------------------------------------------- */
section { margin-top: clamp(3rem, 9vw, 4.5rem); }

h2 {
  font-size: var(--step--1); font-weight: 650; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-faint);
  margin: 0 0 1.5rem; padding-bottom: .6rem; border-bottom: 1px solid var(--line);
}
h3 { font-size: var(--step-0); font-weight: 650; margin: 0 0 .15rem; }

/* --- pilares ------------------------------------------------------------ */
.pillars { display: grid; gap: 1.6rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.pillar h3 { display: flex; align-items: center; gap: .5rem; }
.pillar h3::before {
  content: ""; width: .5rem; height: .5rem; border-radius: 50%;
  background: var(--accent); flex: none;
}
.pillar:nth-child(2) h3::before { background: var(--accent-2); }
.pillar:nth-child(3) h3::before { background: var(--ink-faint); }
.pillar p { margin: 0; color: var(--ink-soft); font-size: var(--step--1); line-height: 1.6; }

/* --- listas de items (experiencia, formación) --------------------------- */
.items { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.7rem; }
.item { display: grid; grid-template-columns: 8.5rem 1fr; gap: 0 1.5rem; align-items: baseline; }
.when { font-family: var(--mono); font-size: var(--step--1); color: var(--ink-faint); font-variant-numeric: tabular-nums; }
.what p { margin: .2rem 0 0; color: var(--ink-soft); font-size: var(--step--1); }
.where { color: var(--ink-soft); font-size: var(--step--1); }

.subitems { list-style: none; margin: .5rem 0 0; padding: 0; display: grid; gap: .3rem; }
.subitems li { color: var(--ink-soft); font-size: var(--step--1); padding-left: 1rem; position: relative; }
.subitems li::before { content: "·"; position: absolute; left: .2rem; color: var(--ink-faint); }

/* --- proyectos ---------------------------------------------------------- */
.projects { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.5rem; }
.project { padding-left: 1rem; border-left: 2px solid var(--line); }
.project:hover { border-left-color: var(--accent); }
.project h3 a { border: 0; }
.project h3 a::after { content: " ↗"; font-size: .8em; color: var(--ink-faint); }
.project p { margin: .2rem 0 0; color: var(--ink-soft); font-size: var(--step--1); }
.tags { margin: .45rem 0 0; display: flex; flex-wrap: wrap; gap: .35rem; }
.tags span {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .02em;
  color: var(--ink-faint); background: var(--bg-soft);
  border: 1px solid var(--line); border-radius: 999px; padding: .05rem .55rem;
}

.note { color: var(--ink-faint); font-size: var(--step--1); margin: 0 0 1.4rem; }

/* --- contacto ----------------------------------------------------------- */
.contact { list-style: none; margin: 0; padding: 0; display: grid; gap: .55rem; }
.contact li { display: grid; grid-template-columns: 8.5rem 1fr; gap: 0 1.5rem; }
.contact .k { font-family: var(--mono); font-size: var(--step--1); color: var(--ink-faint); }

footer {
  margin-top: clamp(3.5rem, 10vw, 5.5rem); padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-faint); font-size: var(--step--1);
  display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; justify-content: space-between;
}

/* --- responsive --------------------------------------------------------- */
@media (max-width: 34rem) {
  .item, .contact li { grid-template-columns: 1fr; gap: .15rem; }
  .top { flex-direction: column; align-items: flex-start; gap: .6rem; }
}

/* --- impresión (es un CV) ----------------------------------------------- */
@media print {
  :root { --ink: #000; --ink-soft: #333; --ink-faint: #666; --bg: #fff; --line: #ccc; }
  body { padding: 0; font-size: 10.5pt; }
  .top nav, .theme, footer { display: none; }
  section { margin-top: 1.4rem; break-inside: avoid; }
  a { color: #000; border: 0; }
  .project { break-inside: avoid; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}