/* ==========================================================================
   breinergonza.github.io — estilos sin dependencias
   ========================================================================== */

:root {
  /* Tema oscuro por defecto */
  --bg: #0b0f14;
  --bg-elev: #0f141b;
  --surface: #121922;
  --border: #1f2a37;
  --text: #e6edf3;
  --muted: #8b98a8;
  --accent: #4d8dff;
  --accent-2: #9b6bff;
  --accent-3: #ff6b9a;
  --ok: #3ddc97;
  --code-bg: #0a0e13;
  --code-text: #c9d1d9;
  --shadow: 0 1px 2px rgb(0 0 0 / .3), 0 12px 32px rgb(0 0 0 / .35);
  --radius: 14px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --gradient: linear-gradient(120deg, var(--accent), var(--accent-2) 55%, var(--accent-3));
  --gutter: clamp(16px, 4vw, 72px);
  color-scheme: dark;
}

/* Tema claro solo si el visitante lo elige */
:root[data-theme="light"] {
  --bg: #f6f7f9;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --border: #e3e7ed;
  --text: #0f172a;
  --muted: #5b6676;
  --accent: #0a66ff;
  --accent-2: #7a3cff;
  --accent-3: #e0457b;
  --ok: #0f9d6b;
  --code-bg: #0d1117;
  --shadow: 0 1px 2px rgb(15 23 42 / .04), 0 8px 24px rgb(15 23 42 / .06);
  color-scheme: light;
}

/* Base ------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -.02em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: .85em; }
.icon { width: 1.1em; height: 1.1em; flex: none; vertical-align: -.18em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 8px;
}
.skip:focus { top: 12px; }

.wrap { width: 100%; padding-inline: var(--gutter); }

/* Topbar ----------------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar__inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-weight: 600; font-size: .95rem; }
.brand img { border-radius: 7px; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  font-size: .9rem; color: var(--muted); padding: 6px 12px; border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav a:hover, .nav a.is-active { color: var(--text); background: var(--surface); }
.theme-toggle {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
  color: var(--text); cursor: pointer;
}
.theme-toggle__moon { display: none; }
:root[data-theme="light"] .theme-toggle__sun { display: none; }
:root[data-theme="light"] .theme-toggle__moon { display: block; }

/* Hero ------------------------------------------------------------------- */
.hero { position: relative; padding: 88px 0 40px; isolation: isolate; }
.hero::before {
  content: ""; position: absolute; inset: -120px 0 auto; height: 640px; z-index: -1;
  background:
    radial-gradient(600px 300px at 15% 20%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
    radial-gradient(500px 280px at 85% 10%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .5;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 56px; align-items: center; }
.hero__grid > * { min-width: 0; }
.prompt { font-family: var(--mono); font-size: .9rem; color: var(--muted); margin: 0 0 18px; }
.prompt__user { color: var(--ok); }
.prompt__path { color: var(--accent); }
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.4rem); font-weight: 700; letter-spacing: -.035em;
  background: linear-gradient(180deg, var(--text), color-mix(in srgb, var(--text) 70%, var(--muted)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__role { font-size: clamp(1.1rem, 2.2vw, 1.35rem); font-weight: 600; margin: 14px 0 6px; }
.hero__rotate { font-size: 1.1rem; color: var(--muted); margin: 0 0 28px; min-height: 3.4em; }
.rotate {
  font-family: var(--mono); font-weight: 500;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.rotate::after {
  content: "▍"; margin-left: 2px; color: var(--accent);
  -webkit-text-fill-color: var(--accent); animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero__cta { display: flex; flex-wrap: wrap; gap: 10px; }
.hero__loc { display: flex; align-items: center; gap: 6px; margin: 22px 0 0; font-size: .9rem; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 10px; font-weight: 600; font-size: .92rem;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  transition: transform .15s, border-color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); box-shadow: var(--shadow); }
.btn--primary { background: var(--gradient); color: #fff; border-color: transparent; }
.btn--primary:hover { border-color: transparent; }
.btn--ghost { background: transparent; }

.hero__card { position: relative; }
.window {
  background: var(--code-bg); border: 1px solid #1f2a37; border-radius: var(--radius);
  box-shadow: var(--shadow), 0 30px 60px -20px color-mix(in srgb, var(--accent-2) 35%, transparent);
  overflow: hidden;
}
.window__bar { display: flex; align-items: center; gap: 7px; padding: 12px 14px; border-bottom: 1px solid #1f2a37; }
.window__bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.window__bar i:nth-child(2) { background: #febc2e; }
.window__bar i:nth-child(3) { background: #28c840; }
.window__bar span { margin-left: 8px; font: 500 .8rem var(--mono); color: #7d8590; }
.code {
  margin: 0; padding: 18px 20px 22px; overflow-x: auto;
  font: 400 .84rem/1.7 var(--mono); color: var(--code-text);
}
.code .k { color: #79c0ff; }
.code .s { color: #a5d6ff; }
.code .b { color: #ff7b72; }
.hero__photo img {
  position: absolute; right: -14px; bottom: -28px; width: 112px; height: 112px;
  border-radius: 50%; object-fit: cover;
  border: 4px solid var(--bg); box-shadow: var(--shadow);
}

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 72px 0 0;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.stat { background: var(--bg-elev); padding: 22px 24px; }
.stat dt {
  font: 700 2rem/1 var(--font); letter-spacing: -.03em;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
  width: fit-content;
}
.stat dd { margin: 8px 0 0; color: var(--muted); font-size: .88rem; }

/* Secciones -------------------------------------------------------------- */
.section { padding: 72px 0; }
.section__title { display: flex; align-items: baseline; gap: 14px; font-size: clamp(1.6rem, 3vw, 2.1rem); margin-bottom: 12px; }
.section__num { font: 500 .85rem var(--mono); color: var(--accent); }
.section__intro { margin: 0 0 32px; }
.lead { font-size: 1.12rem; margin: 18px 0 28px; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; transition: border-color .2s, transform .2s, box-shadow .2s;
}
.card h3 { display: flex; align-items: center; gap: 10px; font-size: 1.05rem; }
.card h3 .icon { color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  padding: 7px 14px; border-radius: 999px; font-size: .88rem; font-weight: 500;
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.tags li {
  font: 500 .78rem/1 var(--mono); padding: 6px 9px; border-radius: 7px;
  background: color-mix(in srgb, var(--text) 5%, transparent); color: var(--muted);
  border: 1px solid var(--border);
}
.tags--sm li { font-size: .72rem; padding: 5px 8px; }

/* Stack */
.stack { display: grid; grid-template-columns: repeat(auto-fill, minmax(255px, 1fr)); gap: 16px; }
.stack__card:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); transform: translateY(-2px); }

/* Timeline */
.timeline { position: relative; margin-top: 32px; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: var(--border); }
.timeline__item { position: relative; padding: 0 0 36px; }
.timeline__item::before {
  content: ""; position: absolute; left: -28px; top: 7px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--muted);
}
.timeline__item.is-current::before {
  border-color: var(--ok); background: var(--ok);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--ok) 22%, transparent);
}
.timeline__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; align-items: baseline; }
.timeline__head h3 { font-size: 1.15rem; }
.timeline__period { font: 500 .82rem var(--mono); color: var(--muted); }
.timeline__org { margin: 4px 0 10px; color: var(--accent); font-weight: 500; font-size: .95rem; }
.timeline__bullets { display: grid; gap: 6px; }
.timeline__bullets li { position: relative; padding-left: 18px; color: color-mix(in srgb, var(--text) 85%, var(--muted)); }
.timeline__bullets li::before { content: "›"; position: absolute; left: 2px; color: var(--accent); font-weight: 700; }

/* Proyectos */
.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.project { display: flex; flex-direction: column; }
.project:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); transform: translateY(-3px); box-shadow: var(--shadow); }
.project__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.project__repo { display: inline-flex; align-items: center; gap: 6px; font: 500 .8rem var(--mono); color: var(--muted); }
.project__arrow { color: var(--muted); transition: color .2s, transform .2s; }
.project:hover .project__arrow { color: var(--accent); transform: translate(2px, -2px); }
.project h3 { font-size: 1.08rem; }
.project p { margin: 8px 0 14px; color: var(--muted); font-size: .94rem; flex: 1; }
.project__meta { display: flex; justify-content: space-between; font-size: .82rem; }
.project .tags { margin-top: 12px; }
.lang { display: inline-flex; align-items: center; gap: 6px; }
.lang::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.lang[data-lang="Python"]::before { background: #3572a5; }
.lang[data-lang="Jupyter Notebook"]::before { background: #da5b0b; }
.lang[data-lang="React"]::before, .lang[data-lang="JavaScript"]::before { background: #f1e05a; }
.lang[data-lang="C#"]::before { background: #178600; }
.lang[data-lang="TypeScript"]::before { background: #3178c6; }
.more { margin-top: 24px; }
.link { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-weight: 600; }
.link:hover { text-decoration: underline; text-underline-offset: 4px; }

/* Formación */
.edu { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 32px; }
.edu__list { display: grid; gap: 18px; margin-top: 20px; }
.edu__list li { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; }
.edu__list strong { font-weight: 600; }
.edu__list .muted { grid-column: 1; font-size: .9rem; }
.edu__year { grid-row: 1 / span 2; grid-column: 2; align-self: start; font: 500 .78rem var(--mono); color: var(--accent); white-space: nowrap; }
.edu__certs { display: grid; gap: 10px; margin-top: 20px; }
.edu__certs li { position: relative; padding-left: 20px; font-size: .94rem; }
.edu__certs li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 700; }
.edu__pub { margin: 22px 0 0; padding-top: 16px; border-top: 1px dashed var(--border); font-size: .88rem; }

/* Recomendaciones */
.quotes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 32px; }
@media (max-width: 700px) { .quotes { grid-template-columns: 1fr; } }
.quote { margin: 0; display: flex; flex-direction: column; justify-content: space-between; gap: 18px; }
.quote blockquote { margin: 0; font-size: .95rem; color: color-mix(in srgb, var(--text) 85%, var(--muted)); }
.quote blockquote::before { content: "“"; display: block; font: 700 2.2rem/1 Georgia, serif; color: var(--accent-2); margin-bottom: 4px; }
.quote figcaption { display: flex; align-items: center; gap: 12px; font-size: .85rem; }
.quote figcaption img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.quote figcaption span { display: grid; }

/* Contacto */
.contact__box {
  text-align: center; padding: 56px 24px; border-radius: 20px; border: 1px solid var(--border);
  background:
    radial-gradient(400px 200px at 20% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%),
    radial-gradient(400px 200px at 80% 100%, color-mix(in srgb, var(--accent-3) 12%, transparent), transparent 70%),
    var(--bg-elev);
}
.contact__box h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.contact__box p { margin: 10px 0 26px; }
.contact__box .hero__cta { justify-content: center; }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 28px 0; font-size: .88rem; }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* Animación de entrada */
.reveal-ready .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal-ready .reveal.is-visible { opacity: 1; transform: none; }

/* Responsive ------------------------------------------------------------- */
@media (max-width: 900px) {
  .nav { display: none; }
  .theme-toggle { margin-left: auto; }
  .hero { padding-top: 56px; }
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
  .hero__card { max-width: 520px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .edu { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .brand span .muted { display: none; }
  .projects { grid-template-columns: 1fr; }
  .stat dt { font-size: 1.6rem; }
  .code { font-size: .74rem; }
  .hero__photo img { width: 88px; height: 88px; right: -6px; }
  .btn { padding: 10px 14px; }
}

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

@media print {
  .topbar, .theme-toggle, .hero::before, .hero::after, .hero__card, .contact { display: none; }
  .reveal-ready .reveal { opacity: 1; transform: none; }
}

/* 404 */
.notfound { text-align: center; padding: 120px 0; }
.notfound h1 { font-size: 4rem; margin: 8px 0; }
.notfound .btn { margin-top: 16px; }