/* ===== Tokens ===== */
:root {
  --bg: #070b10;
  --bg-alt: #0c1219;
  --surface: #121a22;
  --surface-2: #18222c;
  --line: #243140;
  --text: #e8eef4;
  --muted: #8fa0b0;
  --accent: #4fd1a5;
  --accent-2: #7ae0c0;
  --accent-ink: #04241a;
  --glow: rgba(79, 209, 165, .22);
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
  --wrap: 1140px;
  --radius: 16px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --px: 50%;
  --py: 20%;
  --scroll: 0;
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  color-scheme: dark;
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  isolation: isolate;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
h1, h2, h3 {
  font-family: var(--font-head);
  line-height: 1.12;
  margin: 0 0 .5rem;
  letter-spacing: -.02em;
}
h1 { font-size: clamp(2.35rem, 5.2vw, 3.85rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.22rem; font-weight: 500; }
p { margin: 0 0 1rem; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

em {
  font-style: normal;
  color: transparent;
  background: linear-gradient(120deg, var(--accent) 0%, #c8ffe8 42%, var(--accent) 80%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  animation: sheen 7s linear infinite;
}

.wrap { width: min(var(--wrap), calc(100% - 2.5rem)); margin-inline: auto; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.eyebrow {
  font-family: var(--font-head);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
}
.lead { font-size: 1.15rem; color: var(--muted); max-width: 40rem; }

/* ===== Atmosphere ===== */
.fx, .grain, .spot { pointer-events: none; }
.fx {
  position: fixed; inset: 0; z-index: -2; overflow: hidden;
}
.fx__orb {
  position: absolute; border-radius: 50%;
  filter: blur(70px);
  opacity: .55;
  will-change: transform;
}
.fx__orb--a {
  width: 52vw; height: 52vw; max-width: 680px; max-height: 680px;
  top: -18%; right: -12%;
  background: radial-gradient(circle, rgba(79, 209, 165, .28), transparent 68%);
  animation: drift-a 22s var(--ease) infinite alternate;
}
.fx__orb--b {
  width: 40vw; height: 40vw; max-width: 520px; max-height: 520px;
  bottom: 8%; left: -14%;
  background: radial-gradient(circle, rgba(56, 120, 180, .22), transparent 70%);
  animation: drift-b 28s var(--ease) infinite alternate;
}
.fx__orb--c {
  width: 28vw; height: 28vw; max-width: 380px; max-height: 380px;
  top: 46%; left: 38%;
  background: radial-gradient(circle, rgba(79, 209, 165, .12), transparent 70%);
  animation: drift-c 18s var(--ease) infinite alternate;
}
.grain {
  position: fixed; inset: 0; z-index: 80; opacity: .045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}
.spot {
  position: fixed; inset: 0; z-index: -1;
  background: radial-gradient(620px circle at var(--px) var(--py), rgba(79, 209, 165, .09), transparent 55%);
  transition: background .08s linear;
}

@keyframes drift-a {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-8%, 10%) scale(1.12); }
}
@keyframes drift-b {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(12%, -8%) scale(1.08); }
}
@keyframes drift-c {
  from { transform: translate(0, 0); }
  to { transform: translate(-16%, 14%); }
}
@keyframes sheen {
  to { background-position: 220% center; }
}
@keyframes spin {
  to { transform: rotate(1turn); }
}
@keyframes marquee {
  to { transform: translateX(calc(-100% - .55rem)); }
}

/* ===== Buttons ===== */
.btn {
  position: relative;
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .85rem 1.45rem; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 600; font-size: .95rem;
  border: 1px solid transparent;
  overflow: hidden;
  transition: transform .25s var(--ease), background .2s ease, box-shadow .25s ease;
}
.btn::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(255,255,255,.4) 50%, transparent 65%);
  transform: translateX(-130%);
  transition: transform .55s var(--ease);
  pointer-events: none;
}
.btn:hover {
  transform: translateY(-2px);
  background: var(--accent-2);
  box-shadow: 0 12px 28px -12px var(--glow);
}
.btn:hover::after { transform: translateX(130%); }
.btn:active { transform: translateY(0); }
.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  box-shadow: none;
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
}
.btn--sm { padding: .48rem 1rem; font-size: .85rem; }
.btn--lg { padding: 1.05rem 1.75rem; font-size: 1.05rem; }
.link {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  transition: gap .2s var(--ease), color .2s ease;
}
.link:hover { gap: .45rem; color: var(--accent-2); }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
}
.nav__progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 1.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(var(--scroll));
  transform-origin: left center;
  box-shadow: 0 0 8px rgba(79, 209, 165, .35);
  pointer-events: none;
}
.nav__in { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav__brand {
  font-family: var(--font-head); font-weight: 700; color: var(--text); font-size: 1.08rem;
  letter-spacing: -.02em;
}
.nav__brand span { color: var(--accent); }
.nav__links { display: flex; gap: 1.5rem; align-items: center; }
.nav__links a {
  color: var(--muted); font-size: .93rem; font-weight: 500;
  position: relative;
  transition: color .2s ease;
}
.nav__links a:not(.btn)::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -6px; height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease);
}
.nav__links a:hover { color: var(--text); }
.nav__links a[aria-current="true"] { color: var(--text); }
.nav__links a[aria-current="true"]::after,
.nav__links a:not(.btn):hover::after { transform: scaleX(1); }
.nav__links a.btn { color: var(--accent-ink); }
.nav__toggle {
  display: none; background: none; border: 0; padding: 0; cursor: pointer;
  width: 36px; height: 36px; position: relative;
}
.nav__toggle span {
  position: absolute; left: 7px; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s ease, top .25s var(--ease);
}
.nav__toggle span:nth-child(1) { top: 11px; }
.nav__toggle span:nth-child(2) { top: 17px; }
.nav__toggle span:nth-child(3) { top: 23px; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { top: 17px; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { top: 17px; transform: rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  padding: clamp(3.6rem, 9vw, 7.2rem) 0 clamp(3.2rem, 6vw, 5.4rem);
  position: relative; overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  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: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000 20%, transparent 75%);
  pointer-events: none;
}
.hero__in { display: grid; grid-template-columns: 1.3fr .8fr; gap: 3rem; align-items: center; position: relative; }
.hero__cta { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.7rem 0 2rem; }
.hero__facts {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: .55rem;
}
.hero__facts li {
  color: var(--muted); font-size: .9rem;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .38rem .9rem;
  backdrop-filter: blur(8px);
}
.hero__facts strong { color: var(--text); font-weight: 600; }
.hero__media { display: flex; justify-content: center; }

.portrait {
  position: relative;
  width: min(340px, 80%);
}
.portrait__ring {
  position: absolute;
  inset: -11px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 35%, var(--accent) 50%, transparent 62%);
  animation: spin 9s linear infinite;
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 3px), #000 calc(100% - 2px));
}
.portrait__img {
  width: 100%;
  aspect-ratio: 1; border-radius: 50%; overflow: hidden;
  border: 3px solid var(--line);
  box-shadow:
    0 0 0 12px rgba(79, 209, 165, .07),
    0 30px 70px -18px rgba(0,0,0,.75);
  position: relative;
  z-index: 1;
}
.portrait__img img { width: 100%; height: 100%; object-fit: cover; }

/* ===== Sections ===== */
.section { padding: clamp(3.6rem, 8vw, 6.2rem) 0; position: relative; }
.section--alt {
  background: color-mix(in srgb, var(--bg-alt) 88%, transparent);
  border-block: 1px solid var(--line);
}
.section__head { margin-bottom: 2.5rem; max-width: 44rem; }
.section__head .muted { font-size: 1.05rem; }

.grid { display: grid; gap: 1.2rem; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card,
.project,
.steps li {
  --sx: 50%;
  --sy: 0%;
  position: relative;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  transition: border-color .25s ease, transform .35s var(--ease), box-shadow .35s var(--ease);
}
.card::before,
.project::before,
.steps li::before {
  content: "";
  position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(240px circle at var(--sx) var(--sy), rgba(79, 209, 165, .16), transparent 50%);
  opacity: 0;
  transition: opacity .3s ease;
  pointer-events: none;
  z-index: 0;
}
.card:hover::before,
.project:hover::before,
.steps li:hover::before { opacity: 1; }
.card > *,
.project > *,
.steps li > * { position: relative; z-index: 1; }
.card:hover,
.project:hover,
.steps li:hover {
  border-color: color-mix(in srgb, var(--accent) 38%, var(--line));
  transform: translateY(-5px);
  box-shadow: 0 22px 48px -28px var(--glow);
}

.card { padding: 1.7rem; }
.card__icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: rgba(79, 209, 165, .12);
  margin-bottom: 1.15rem;
  box-shadow: inset 0 0 0 1px rgba(79, 209, 165, .18);
  transition: transform .35s var(--ease), background .25s ease;
}
.card:hover .card__icon {
  transform: scale(1.08) rotate(-6deg);
  background: rgba(79, 209, 165, .2);
}
.card__icon svg {
  width: 24px; height: 24px; fill: none; stroke: var(--accent);
  stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}
.card p { color: var(--muted); margin: 0; font-size: .97rem; }

/* ===== Projects ===== */
.projects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.project { padding: 1.7rem; display: flex; flex-direction: column; gap: .4rem; }
.project--featured {
  grid-column: span 3;
  background:
    radial-gradient(1200px 280px at 90% -20%, rgba(79, 209, 165, .16), transparent 55%),
    color-mix(in srgb, var(--surface) 82%, transparent);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  overflow: hidden;
}
.project--featured::after {
  content: "";
  position: absolute; right: -8%; top: -50%;
  width: 46%; height: 200%;
  background: radial-gradient(closest-side, rgba(79, 209, 165, .18), transparent 72%);
  pointer-events: none;
}
.project--featured .project__body { max-width: 44rem; }
.project--featured h3 { font-size: 1.75rem; }
.project__tag {
  font-size: .76rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); margin: 0; font-weight: 600;
}
.project p { color: var(--muted); font-size: .97rem; margin: 0 0 .6rem; }
.project h3 { margin-top: .2rem; }
.project .link { margin-top: .4rem; }

.chips { list-style: none; padding: 0; margin: auto 0 0; display: flex; flex-wrap: wrap; gap: .4rem; }
.chips li {
  font-size: .78rem; font-weight: 500; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: .22rem .7rem;
  background: color-mix(in srgb, var(--bg) 40%, transparent);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.chips li:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background: rgba(79, 209, 165, .08);
}
.chips--lg li {
  font-size: .95rem; padding: .55rem 1.05rem; color: var(--text);
  background: var(--surface-2); white-space: nowrap;
}
.stack .section__head { margin-bottom: 1.2rem; }

.marquee {
  display: flex;
  gap: .55rem;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: flex; flex-wrap: nowrap; flex-shrink: 0; gap: .55rem;
  margin: 0; padding: 0 0 .2rem;
  animation: marquee 34s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }

/* ===== Steps ===== */
.steps {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem;
}
.steps li { padding: 1.45rem 1.2rem 1.25rem; }
.steps__n {
  font-family: var(--font-head); font-weight: 700;
  color: var(--accent); font-size: .9rem; letter-spacing: .1em;
  display: block; margin-bottom: .6rem;
}
.steps h3 { font-size: 1.05rem; }
.steps p { color: var(--muted); font-size: .92rem; margin: 0; }

/* ===== Timeline ===== */
.timeline { display: grid; gap: 0; border-left: 1px solid var(--line); margin-left: .5rem; }
.tl {
  display: grid; grid-template-columns: 150px 1fr; gap: 1.5rem;
  padding: 1.45rem 0 1.45rem 2rem; position: relative;
}
.tl::before {
  content: "";
  position: absolute; left: -5px; top: 2rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
  transition: box-shadow .4s ease, transform .4s var(--ease);
}
.tl.is-visible::before {
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 8px rgba(79, 209, 165, .18), 0 0 18px var(--accent);
  transform: scale(1.15);
}
.tl__when {
  font-family: var(--font-head); font-weight: 500;
  color: var(--muted); font-size: .95rem; padding-top: .2rem;
}
.tl h3 { font-size: 1.1rem; }
.tl p { color: var(--muted); margin: 0; font-size: .97rem; }

/* ===== Contact ===== */
.section--contact {
  background: linear-gradient(180deg, transparent 0%, rgba(14, 32, 28, .55) 100%);
  border-top: 1px solid var(--line);
}
.contact { text-align: center; max-width: 44rem; }
.contact .lead { margin-inline: auto; }
.contact__actions {
  display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap;
  margin: 1.9rem 0 1.2rem;
}

/* ===== Footer ===== */
.foot {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
  font-size: .9rem; color: var(--muted);
  position: relative; z-index: 1;
}
.foot__in { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }
.foot a { color: var(--muted); transition: color .2s ease; }
.foot a:hover { color: var(--text); }

/* ===== Reveal ===== */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0ms);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  em, .fx__orb, .portrait__ring, .marquee__track, .btn::after { animation: none; }
  .card:hover, .project:hover, .steps li:hover, .btn:hover { transform: none; }
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .grid--3, .projects, .steps { grid-template-columns: repeat(2, 1fr); }
  .project--featured { grid-column: span 2; }
  .hero__in { grid-template-columns: 1fr; text-align: center; }
  .hero__cta, .hero__facts { justify-content: center; }
  .lead { margin-inline: auto; }
  .hero__media { order: -1; }
  .portrait { width: 210px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .grid--3, .projects, .steps { grid-template-columns: 1fr; }
  .project--featured { grid-column: span 1; }
  .tl { grid-template-columns: 1fr; gap: .3rem; }
  .portrait { width: 168px; }
  .hero { padding-top: 2.4rem; }
  .hero__in { gap: 1.5rem; }
  .nav__toggle { display: block; }
  .nav__links {
    display: none; position: absolute; left: 0; right: 0; top: 68px;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-alt);
    backdrop-filter: blur(20px) saturate(1.2);
    border-bottom: 1px solid var(--line);
    padding: .5rem 1.25rem 1rem;
    box-shadow: 0 18px 40px -20px rgba(0,0,0,.8);
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .nav__links a:not(.btn)::after { display: none; }
  .nav__links a.btn { margin-top: .8rem; justify-content: center; border-bottom: 0; }
}

@media (pointer: coarse) {
  .spot { display: none; }
}

/* Switch de idioma */
.nav__links a.nav__lang {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .08em;
  padding: .3rem .55rem;
  border: 1px solid var(--border, rgba(255,255,255,.14));
  border-radius: 999px;
  color: var(--muted, #9aa3ad);
}
.nav__links a.nav__lang::after { display: none; }
.nav__links a.nav__lang:hover { color: var(--accent); border-color: var(--accent); }