/* FELDEM — sistema visual de la guía de marca 2026 (paleta, Montserrat/Inter,
   geometría limpia, alto contraste, espacio generoso). Sin frameworks. */
:root {
  --bg: #0A0A0A;          /* negro profundo */
  --bg-2: #0E1116;
  --surface: #141920;
  --pizarra: #1F2937;
  --acero: #A7B3C7;       /* acento */
  --monte: #4B5563;
  --claro: #E5E7EB;
  --texto: #C5CCD8;
  --blanco: #FFFFFF;
  --line: rgba(167, 179, 199, .16);
  --line-strong: rgba(167, 179, 199, .34);
  --head: "Montserrat", ui-sans-serif, system-ui, sans-serif;
  --body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --wrap: 1160px;
  --nav-h: 72px;
  --r: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 8px); }
body { margin: 0; background: var(--bg); color: var(--texto); font: 400 16px/1.65 var(--body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--acero); text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--head); color: var(--blanco); margin: 0; letter-spacing: -.015em; }
h1 { font-size: clamp(2.6rem, 6vw, 4.8rem); font-weight: 700; line-height: 1.02; letter-spacing: -.03em; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); font-weight: 600; line-height: 1.15; }
h3 { font-size: clamp(1.15rem, 2vw, 1.45rem); font-weight: 600; }
h4 { font-size: 1.02rem; font-weight: 600; line-height: 1.35; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 2.5rem); }
.kicker { color: var(--acero); font: 600 .74rem/1 var(--head); letter-spacing: .3em; text-transform: uppercase; margin: 0 0 1.1rem; }
.sub { color: var(--texto); font-size: 1.08rem; max-width: 46rem; margin-top: 1rem; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--blanco); color: var(--bg); padding: .5rem 1rem; z-index: 99; }
.ico { width: 26px; height: 26px; }

/* ---------- botones ---------- */
.btn { display: inline-flex; align-items: center; gap: .55rem; font: 600 .92rem var(--head); padding: .8rem 1.35rem; border-radius: 999px; border: 1px solid transparent; cursor: pointer; transition: transform .2s, background .2s, border-color .2s, color .2s; white-space: nowrap; }
.btn-primary { background: var(--blanco); color: var(--bg); }
.btn-primary:hover { background: var(--claro); transform: translateY(-1px); }
.btn-ghost { color: var(--claro); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--acero); color: var(--blanco); }

/* ---------- navegación ---------- */
.top { position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 50; background: rgba(10, 10, 10, .55); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid transparent; transition: background .3s, border-color .3s; }
.top.scrolled { background: rgba(10, 10, 10, .82); border-bottom-color: var(--line); }
.top .wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand img { height: 44px; width: auto; }
.top nav { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.2rem); }
.top nav a:not(.btn) { color: var(--claro); font: 500 .92rem var(--body); position: relative; }
.top nav a:not(.btn)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px; background: var(--acero); transition: right .25s; }
.top nav a:not(.btn):hover::after { right: 0; }
.menu { display: none; background: none; border: 0; width: 44px; height: 44px; padding: 10px; cursor: pointer; }
.menu span { display: block; height: 2px; background: var(--claro); margin: 6px 0; transition: transform .25s, opacity .25s; }

/* ---------- hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; padding: calc(var(--nav-h) + 4rem) 0 5rem; overflow: hidden; isolation: isolate; }
.hero-img { position: absolute; inset: 0; z-index: -1; }
.hero-img img { width: 100%; height: 100%; object-fit: cover; object-position: 70% 20%; }
.hero-img::after { content: ""; position: absolute; inset: 0; background:
  linear-gradient(90deg, var(--bg) 0%, rgba(10,10,10,.85) 28%, rgba(10,10,10,.25) 58%, rgba(10,10,10,0) 80%),
  linear-gradient(180deg, rgba(10,10,10,.35) 0%, rgba(10,10,10,0) 30%, rgba(10,10,10,0) 60%, var(--bg) 100%); }
.hero-body { max-width: 760px; margin-left: max((100vw - var(--wrap)) / 2, 0px); }
.lede { color: var(--claro); font-size: clamp(1.05rem, 1.5vw, 1.2rem); max-width: 34rem; margin: 1.6rem 0 2.2rem; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.proof { list-style: none; margin: 2.8rem 0 0; padding: 0; display: grid; gap: .55rem; color: var(--acero); font-size: .9rem; }
.proof li { display: flex; align-items: center; gap: .5rem; }
.proof li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--acero); box-shadow: 0 0 10px 2px rgba(167,179,199,.5); }

/* ---------- valores ---------- */
.values { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.values ul { list-style: none; margin: 0; padding: 2.4rem 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 1.5rem; }
.values li { padding: 0 1.2rem 0 0; border-left: 1px solid var(--line); padding-left: 1.2rem; }
.values li:first-child { border-left: 0; padding-left: 0; }
.values .ico { color: var(--acero); margin-bottom: .8rem; }
.values h3 { font-size: 1rem; margin-bottom: .25rem; }
.values p { color: var(--texto); font-size: .9rem; }

/* ---------- servicios ---------- */
.services { padding: clamp(4rem, 9vw, 7.5rem) 0 2rem; }
.section-head { max-width: 46rem; }
.pills { position: sticky; top: var(--nav-h); z-index: 20; display: flex; flex-wrap: wrap; gap: .5rem; scrollbar-width: none; margin: 2.2rem 0 1rem; padding: .7rem 0; background: linear-gradient(var(--bg) 85%, transparent); }
.pills::-webkit-scrollbar { display: none; }
.pills a { flex: 0 0 auto; color: var(--claro); font: 500 .82rem var(--body); padding: .45rem .95rem; border: 1px solid var(--line); border-radius: 999px; transition: border-color .2s, background .2s, color .2s; }
.pills a:hover, .pills a.active { border-color: var(--acero); background: rgba(167,179,199,.1); color: var(--blanco); }
.cat { padding: 3rem 0 2rem; border-top: 1px solid var(--line); }
.cat:first-of-type { border-top: 0; }
.cat header { display: grid; grid-template-columns: 56px 1fr; gap: 1.2rem; align-items: start; margin-bottom: 1.8rem; }
.cat-ico { width: 56px; height: 56px; border-radius: 14px; border: 1px solid var(--line-strong); display: grid; place-items: center; color: var(--acero); background: linear-gradient(160deg, rgba(167,179,199,.12), rgba(31,41,55,.25)); }
.cat-n { display: block; color: var(--monte); font: 600 .74rem var(--head); letter-spacing: .25em; margin-bottom: .35rem; }
.cat header p { color: var(--texto); margin-top: .4rem; }
.cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.cards li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 1.35rem 1.4rem; transition: border-color .25s, transform .25s, background .25s; }
.cards li:hover { border-color: var(--acero); transform: translateY(-3px); background: #171d26; }
.cards h4 { margin-bottom: .55rem; }
.cards p { color: var(--texto); font-size: .92rem; line-height: 1.55; }

/* ---------- nosotros ---------- */
.about { padding: clamp(4rem, 9vw, 7.5rem) 0; border-top: 1px solid var(--line); background: radial-gradient(60% 70% at 85% 50%, rgba(167,179,199,.09), transparent 70%); }
.about-grid { display: grid; grid-template-columns: 1.3fr .9fr; gap: 3rem; align-items: center; }
.about p { color: var(--texto); font-size: 1.05rem; margin-top: 1.1rem; max-width: 40rem; }
.about .tagline { color: var(--blanco); font: 600 1.2rem var(--head); margin-top: 1.8rem; }
.about-logo { margin: 0; display: grid; place-items: center; }
.about-logo img { width: min(360px, 70%); filter: drop-shadow(0 0 40px rgba(167,179,199,.28)); }

/* ---------- contacto ---------- */
.contact { padding: clamp(4rem, 9vw, 7.5rem) 0; border-top: 1px solid var(--line); }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 3.5rem; align-items: start; }
.contact-info { margin: 2rem 0 0; display: grid; gap: 1rem; }
.contact-info dt { color: var(--monte); font: 600 .72rem var(--head); letter-spacing: .25em; text-transform: uppercase; margin-bottom: .2rem; }
.contact-info dd { margin: 0; color: var(--claro); font-size: 1.02rem; }
form { display: grid; gap: 1rem; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: clamp(1.25rem, 3vw, 2rem); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
label { display: grid; gap: .4rem; font: 600 .8rem var(--head); color: var(--claro); }
.opt { color: var(--monte); font-weight: 400; }
input, textarea { font: 400 1rem var(--body); color: var(--blanco); background: var(--bg); border: 1px solid var(--line-strong); border-radius: 12px; padding: .8rem .95rem; width: 100%; transition: border-color .2s, box-shadow .2s; }
input:focus, textarea:focus { outline: 0; border-color: var(--acero); box-shadow: 0 0 0 3px rgba(167,179,199,.18); }
textarea { resize: vertical; min-height: 130px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.status { min-height: 1.5em; color: var(--acero); font-size: .92rem; }
.status.error { color: #F3B6B6; }
.status.ok { color: #BFE3C6; }
form[aria-busy="true"] .btn { opacity: .6; pointer-events: none; }

/* ---------- pie ---------- */
footer { border-top: 1px solid var(--line); background: var(--bg-2); }
.foot { display: grid; grid-template-columns: auto 1fr auto auto; align-items: center; gap: 1.5rem 2rem; padding-top: 2rem; padding-bottom: 2rem; color: var(--monte); font-size: .9rem; }
.foot img { height: 44px; width: auto; }
.foot nav { display: flex; gap: 1.4rem; }
.foot nav a { color: var(--texto); font-size: .9rem; }
.foot nav a:hover { color: var(--blanco); }

/* ---------- aparición ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .cards li { transition: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .values ul { grid-template-columns: repeat(3, 1fr); }
  .values li:nth-child(4) { border-left: 0; padding-left: 0; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .about-logo { order: -1; }
  .about-logo img { width: 200px; }
}
@media (max-width: 760px) {
  .menu { display: block; }
  .menu[aria-expanded="true"] span:first-child { transform: translateY(8px) rotate(45deg); }
  .menu[aria-expanded="true"] span:last-child { transform: translateY(-8px) rotate(-45deg); }
  .top nav { position: fixed; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: rgba(10,10,10,.96); border-bottom: 1px solid var(--line); padding: .5rem 1.25rem 1.25rem; display: none; }
  .top nav.open { display: flex; }
  .top nav a:not(.btn) { padding: .9rem 0; border-bottom: 1px solid var(--line); }
  .top nav .btn { margin-top: 1rem; justify-content: center; }
  .hero { min-height: auto; padding-top: calc(var(--nav-h) + 1rem); display: block; }
  .hero-img { position: relative; inset: auto; height: 46vw; min-height: 240px; z-index: 0; }
  .hero-img img { object-position: 60% 20%; }
  .hero-img::after { background: linear-gradient(180deg, rgba(10,10,10,.2) 0%, rgba(10,10,10,0) 40%, var(--bg) 100%); }
  .hero-body { margin: -2rem auto 0; padding: 0 1.25rem; position: relative; }
  .values ul { grid-template-columns: 1fr 1fr; gap: 1.2rem; }
  .values li { border-left: 0; padding-left: 0; }
  .row { grid-template-columns: 1fr; }
  .pills { flex-wrap: nowrap; overflow-x: auto; margin-left: -1.25rem; margin-right: -1.25rem; padding-left: 1.25rem; padding-right: 1.25rem; }
  .foot { grid-template-columns: 1fr 1fr; }
}