/* Rubén Ceballos — personal site
   Estilo: oscuro moderno con acento cian→violeta. Sin dependencias externas. */

/* ---------- Fuentes ---------- */
@font-face{font-family:Inter;font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/inter-400.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/inter-500.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/inter-600.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/inter-700.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:800;font-display:swap;src:url(/assets/fonts/inter-800.woff2) format("woff2")}

/* ---------- Tokens ---------- */
:root{
  --bg:#0b0f17;
  --bg-2:#0e1420;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);
  --text:#e8eef8;
  --text-2:#a9b8d0;
  --muted:#7d8ea8;
  --accent:#38bdf8;
  --accent-2:#8b5cf6;
  --accent-soft:rgba(56,189,248,.14);
  --grad:linear-gradient(100deg,#38bdf8 0%,#818cf8 48%,#a78bfa 100%);
  --shadow:0 24px 60px -28px rgba(0,0,0,.85);
  --ring:0 0 0 3px rgba(56,189,248,.35);
  --r-sm:10px; --r-md:16px; --r-lg:22px;
  --wrap:1080px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:64px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px);-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16.5px;line-height:1.65;letter-spacing:.1px;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;line-height:1.15;letter-spacing:-.02em}
p{margin:0 0 1rem}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}
.skip{position:absolute;left:-999px;top:0;z-index:100;background:#fff;color:#000;padding:.6rem 1rem;border-radius:0 0 8px 0}
.skip:focus{left:0}
.muted{color:var(--muted)}
strong{color:#fff;font-weight:700}

/* ---------- Layout ---------- */
.wrap{width:min(var(--wrap),92vw);margin-inline:auto}
.section{padding:clamp(3.5rem,8vw,6rem) 0;position:relative}

/* ---------- Fondo ---------- */
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:
  radial-gradient(1200px 700px at 78% -10%,rgba(139,92,246,.16),transparent 60%),
  radial-gradient(900px 600px at 8% 8%,rgba(56,189,248,.13),transparent 55%),
  linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%)}
.bg-grid{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(900px 600px at 50% 0%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(900px 600px at 50% 0%,#000 20%,transparent 78%)}
.bg-glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.bg-glow--1{width:420px;height:420px;background:rgba(56,189,248,.22);top:-120px;right:-80px;animation:float 16s var(--ease) infinite}
.bg-glow--2{width:360px;height:360px;background:rgba(139,92,246,.2);top:38%;left:-120px;animation:float 20s var(--ease) infinite reverse}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(28px)}}

/* ---------- Topbar ---------- */
.topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 72%,transparent);border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background .3s var(--ease)}
.topbar.is-stuck{border-bottom-color:var(--border);background:color-mix(in srgb,var(--bg) 88%,transparent)}
.topbar__inner{display:flex;align-items:center;gap:1rem;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700}
.brand__mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:var(--grad);color:#06121c;font-weight:800;font-size:.85rem;letter-spacing:.5px;box-shadow:0 8px 24px -10px rgba(56,189,248,.9)}
.brand__name{font-size:1rem;letter-spacing:-.01em}
.nav{display:flex;gap:.35rem;margin-left:auto}
.nav a{color:var(--text-2);font-size:.9rem;font-weight:500;padding:.5rem .7rem;border-radius:9px;transition:color .2s,background .2s}
.nav a:hover{color:#fff;background:var(--surface-2)}
.topbar__actions{display:flex;align-items:center;gap:.5rem;margin-left:.5rem}
.lang{display:inline-flex;align-items:center;gap:.25rem;background:var(--surface);border:1px solid var(--border);
  color:var(--text-2);border-radius:999px;padding:.32rem .6rem;font:inherit;font-size:.82rem;font-weight:600;cursor:pointer;transition:.2s}
.lang:hover{border-color:var(--border-strong);color:#fff}
.lang__opt{opacity:.5;transition:opacity .2s}
.lang__opt.is-active{opacity:1;color:var(--accent)}
.lang__sep{opacity:.35}
.burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;background:var(--surface);
  border:1px solid var(--border);border-radius:10px;cursor:pointer;padding:0 10px}
.burger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:.25s var(--ease)}
.burger[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded=true] span:nth-child(2){opacity:0}
.burger[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-nav{display:none;flex-direction:column;padding:.5rem 6vw 1rem;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 96%,transparent)}
.mobile-nav a{padding:.7rem .2rem;color:var(--text-2);font-weight:500;border-bottom:1px solid var(--border)}
.mobile-nav a:last-child{border-bottom:0;color:var(--accent)}
.mobile-nav.is-open{display:flex;animation:fadeDown .28s var(--ease)}
@keyframes fadeDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border-radius:12px;
  font-weight:600;font-size:.94rem;padding:.72rem 1.15rem;border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .25s,border-color .2s,background .2s,color .2s}
.btn:hover{transform:translateY(-2px)}
.btn--sm{padding:.42rem .8rem;font-size:.85rem;border-radius:10px}
.btn--primary{background:var(--grad);color:#06121c;box-shadow:0 16px 34px -16px rgba(99,102,241,.95)}
.btn--primary:hover{box-shadow:0 22px 44px -18px rgba(99,102,241,1)}
.btn--ghost{background:var(--surface);border-color:var(--border-strong);color:var(--text)}
.btn--ghost:hover{background:var(--surface-2);border-color:var(--accent)}
.btn--link{background:none;padding-inline:.4rem;color:var(--accent)}
.btn--link:hover{color:#7dd3fc;transform:none}

/* ---------- Hero ---------- */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(1.5rem,4vw,3rem);align-items:center;
  padding:clamp(3rem,7vw,5.5rem) 0 clamp(2.5rem,5vw,4rem);min-height:calc(100svh - var(--header-h))}
.eyebrow{display:inline-block;font-size:.82rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);border:1px solid rgba(56,189,248,.28);padding:.35rem .75rem;border-radius:999px;margin:0 0 1.1rem}
.hero h1{font-size:clamp(2.6rem,7vw,4.4rem);font-weight:800;letter-spacing:-.03em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  padding-bottom:.12em;margin-bottom:.35rem}
.hero__role{font-size:clamp(1.05rem,2.4vw,1.35rem);font-weight:600;color:var(--text);margin:0 0 .9rem}
.hero__lead{color:var(--text-2);max-width:56ch;font-size:1.02rem}
.hero__cta{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;margin:1.4rem 0 1.6rem}
.hero__facts{display:flex;flex-wrap:wrap;gap:1.1rem;color:var(--muted);font-size:.88rem}
.hero__facts li{display:flex;align-items:center;gap:.45rem}
.dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}

/* Terminal */
.hero__panel{display:flex;justify-content:center}
.term{width:100%;max-width:400px;background:linear-gradient(180deg,rgba(13,19,30,.96),rgba(9,13,21,.96));
  border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow);overflow:hidden}
.term__bar{display:flex;align-items:center;gap:.4rem;padding:.6rem .8rem;border-bottom:1px solid var(--border);background:rgba(255,255,255,.03)}
.term__dot{width:11px;height:11px;border-radius:50%}
.term__dot--r{background:#ff5f57}.term__dot--y{background:#febc2e}.term__dot--g{background:#28c840}
.term__title{margin-left:.6rem;font-size:.78rem;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.term__body{margin:0;padding:1rem 1.1rem 1.2rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.83rem;line-height:1.75;color:var(--text-2);overflow-x:auto}
.c-p{color:#22d3ee}.c-o{color:#cbd5e1}.c-g{color:#4ade80}
.c-cursor{color:#22d3ee;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* ---------- Secciones / cabeceras ---------- */
.sec-head{max-width:62ch;margin-bottom:2.2rem}
.sec-kicker{font-size:.8rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 .5rem}
.sec-head h2{font-size:clamp(1.7rem,4vw,2.5rem);font-weight:800}
.sec-sub{margin-top:.6rem}

/* ---------- Card base ---------- */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:1.4rem 1.5rem;
  transition:transform .25s var(--ease),border-color .25s,background .25s,box-shadow .3s}
.card:hover{transform:translateY(-4px);border-color:var(--border-strong);background:var(--surface-2);box-shadow:var(--shadow)}

/* ---------- About ---------- */
.about{display:grid;grid-template-columns:1.5fr .9fr;gap:1.6rem;align-items:start}
.about__main p{color:var(--text-2)}
/* Retrato: SIEMPRE a su relación de aspecto natural (la foto es 1:1).
   width:100% + height:auto => nunca se deforma ni se recorta. */
.about__aside .portrait{margin:0 0 1rem;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--shadow);background:var(--surface);line-height:0}
.about__aside .portrait img{width:100%;height:auto;display:block}
.about__aside .facts{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);overflow:hidden}
.facts li{display:flex;flex-direction:column;gap:.15rem;padding:.85rem 1.1rem;border-bottom:1px solid var(--border)}
.facts li:last-child{border-bottom:0}
.facts__k{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.facts__v{color:var(--text);font-weight:500;font-size:.95rem}

/* ---------- Timeline ---------- */
.timeline{position:relative;padding-left:1.6rem}
.timeline::before{content:"";position:absolute;left:5px;top:.6rem;bottom:.6rem;width:2px;background:linear-gradient(180deg,var(--accent),var(--accent-2),transparent)}
.timeline__item{position:relative;margin-bottom:1rem}
.timeline__mark{position:absolute;left:-1.6rem;top:1.35rem;width:12px;height:12px;border-radius:50%;
  background:var(--bg);border:2px solid var(--accent);box-shadow:0 0 0 4px rgba(56,189,248,.16)}
.timeline__top{display:flex;flex-wrap:wrap;align-items:center;gap:.7rem;justify-content:space-between}
.timeline__body h3{font-size:1.12rem}
.timeline__body .muted{margin:.3rem 0 .7rem;font-size:.92rem}
.timeline__body p:last-child{margin-bottom:0;color:var(--text-2)}
.chip{font-size:.76rem;font-weight:600;color:#bae6fd;background:rgba(56,189,248,.12);border:1px solid rgba(56,189,248,.3);padding:.22rem .6rem;border-radius:999px;white-space:nowrap}

/* ---------- Skills ---------- */
.skills{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.skill h3{display:flex;align-items:center;gap:.55rem;font-size:1rem;margin-bottom:.9rem}
.ico{font-size:1.1rem}
.pills{display:flex;flex-wrap:wrap;gap:.4rem}
.pills li{font-size:.8rem;font-weight:500;color:var(--text-2);background:rgba(255,255,255,.045);
  border:1px solid var(--border);padding:.28rem .62rem;border-radius:999px}

/* ---------- Projects ---------- */
.projects{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
.project{display:flex;flex-direction:column;gap:.6rem}
.project__top{display:flex;align-items:center;justify-content:space-between;min-height:32px}
.project__ico{font-size:1.5rem}
.project h3{font-size:1.15rem}
.project p{color:var(--text-2);font-size:.95rem}
.project .pills{margin-top:auto;padding-top:.4rem}
.project--featured{grid-column:1/-1;background:
  linear-gradient(135deg,rgba(56,189,248,.09),rgba(139,92,246,.09)),var(--surface);
  border-color:rgba(99,102,241,.35)}
.project--featured:hover{border-color:rgba(129,140,248,.6)}
.project--featured p{max-width:80ch}
.badge{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#06121c;
  background:var(--grad);padding:.28rem .7rem;border-radius:999px}

/* ---------- Contact ---------- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:1rem;max-width:760px}
.contact__card{display:flex;flex-direction:column;gap:.3rem;align-items:flex-start}
.contact__ico{font-size:1.4rem}
.contact__label{font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.contact__value{font-weight:600;color:var(--text);word-break:break-word}
.contact__card:hover .contact__value{color:var(--accent)}
.contact__card.is-muted .contact__value{color:var(--text-2)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--border);margin-top:2rem}
.footer__inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.5rem;padding:1.6rem 0;font-size:.88rem;color:var(--text-2)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.skills .reveal:nth-child(2),.projects .reveal:nth-child(2){transition-delay:.06s}
.skills .reveal:nth-child(3),.projects .reveal:nth-child(3){transition-delay:.12s}
.skills .reveal:nth-child(4),.projects .reveal:nth-child(4){transition-delay:.18s}
.skills .reveal:nth-child(5){transition-delay:.24s}
.skills .reveal:nth-child(6){transition-delay:.3s}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .nav{display:none}
  .burger{display:flex}
  .hero{grid-template-columns:1fr;min-height:auto}
  .hero__panel{order:-1;margin-bottom:.5rem}
  .term{max-width:520px}
  .about{grid-template-columns:1fr}
  .skills{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:620px){
  body{font-size:16px}
  .brand__name{display:none}
  .btn--sm[data-i18n="nav.cv"]{display:none}
  .skills,.projects,.contact{grid-template-columns:1fr}
  .hero__cta .btn{flex:1 1 auto}
  .timeline__top{flex-direction:column;align-items:flex-start;gap:.4rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}