/* ==========================================================
   Catena · Quality Systems Consulting
   Paleta y estilo tomados de la web original (verdes + negro)
   ========================================================== */

:root {
  --green-950: #04180f;
  --green-900: #062f1b;
  --green-800: #0a4a26;
  --green-700: #0b7a35;
  --green-600: #0a9a2f;   /* botón "Quiero contactarme" */
  --green-500: #1fb446;
  --lime-400: #5ee038;    /* acento del degradé */
  --lime-300: #8fe05a;
  --ink: #0b0b0b;
  --ink-soft: #3a3f3c;
  --muted: #7a7f7c;
  --paper: #ffffff;
  --paper-2: #f5f7f5;
  --line: #e4e8e5;

  --font-head: "Poppins", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --radius: 22px;
  --shadow: 0 10px 30px rgba(6, 47, 27, .10);
  --maxw: 1120px;
  --nav-h: 68px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
strong, b { font-weight: 600; }
h1, h2, h3 { font-family: var(--font-head); margin: 0; line-height: 1.15; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: min(100% - 2rem, var(--maxw)); margin-inline: auto; }

.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; }

:focus-visible { outline: 3px solid var(--lime-400); outline-offset: 3px; border-radius: 6px; }

/* ---------- Íconos ---------- */
.i {
  width: 1.15em; height: 1.15em; flex: none;
  fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.i--fill { fill: currentColor; stroke: none; }
.i--lg { width: 44px; height: 44px; stroke-width: 1.6; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .8rem 1.4rem; border-radius: 999px; border: 1.5px solid transparent;
  font: 600 .95rem/1 var(--font-head); text-decoration: none; cursor: pointer;
  transition: transform .2s, background .2s, color .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--dark  { background: #000; color: #fff; border-color: rgba(255,255,255,.35); }
.btn--dark:hover { background: #fff; color: #000; }
.btn--light { background: #fff; color: var(--green-900); }
.btn--light:hover { box-shadow: 0 8px 24px rgba(0,0,0,.25); }
.btn--ghost { color: #fff; border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.06); backdrop-filter: blur(4px); }
.btn--ghost:hover { background: rgba(255,255,255,.18); }
.btn--green { background: var(--green-600); color: #fff; border-radius: 10px; padding: .85rem 1.5rem; box-shadow: 0 6px 18px rgba(10,154,47,.3); }
.btn--green:hover { background: #087c26; }
.btn--wa { background: #25d366; color: #05361a; border-radius: 10px; padding: .85rem 1.5rem; }
.btn--wa:hover { background: #1fbd5a; }

/* ---------- NAV ---------- */
.nav {
  position: fixed; inset: env(safe-area-inset-top, 0px) 0 auto 0; z-index: 50; height: var(--nav-h);
  background: rgba(8, 18, 12, .55);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s;
}
.nav.is-solid { background: rgba(8, 18, 12, .92); }
.nav__inner {
  width: min(100% - 2rem, 1240px); margin-inline: auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.nav__brand img { height: 44px; width: auto; }
.nav__menu { display: flex; align-items: center; gap: 1.8rem; }
.nav__menu a:not(.btn) { color: #fff; text-decoration: none; font: 500 .9rem var(--font-head); opacity: .88; }
.nav__menu a:not(.btn):hover { opacity: 1; text-decoration: underline; text-underline-offset: 6px; }
.nav__menu .btn { padding: .65rem 1.15rem; font-size: .85rem; }

.nav__toggle {
  display: none; width: 44px; height: 44px; padding: 0; background: none; border: 0; cursor: pointer;
  flex-direction: column; justify-content: center; align-items: center; gap: 6px;
}
.nav__toggle span { display: block; width: 24px; height: 2px; background: #fff; transition: transform .25s, opacity .25s; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: min(100svh, 820px);
  padding: calc(var(--nav-h) + 3rem) 0 4rem;
  display: flex; align-items: center;
  color: #fff;
  background:
    radial-gradient(60% 55% at 78% 110%, var(--lime-400) 0%, rgba(94,224,56,0) 70%),
    radial-gradient(70% 60% at 25% 105%, #2fb23e 0%, rgba(47,178,62,0) 70%),
    radial-gradient(55% 50% at 100% 0%, #0d5f46 0%, rgba(13,95,70,0) 70%),
    linear-gradient(160deg, #0c4a26 0%, #06301b 45%, #04180f 100%);
}
.hero::before { /* "blob" que respira, como el degradé de la marca */
  content: ""; position: absolute; z-index: -1; left: 8%; bottom: -35%; width: 60%; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(143,224,90,.75) 0%, rgba(94,224,56,0) 65%);
  filter: blur(30px);
  animation: breathe 9s ease-in-out infinite alternate;
}
@keyframes breathe { from { transform: translate(0,0) scale(1); } to { transform: translate(8%, -6%) scale(1.15); } }

.hero__inner {
  width: min(100% - 2rem, 1240px); margin-inline: auto;
  display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 3rem;
}
.eyebrow { text-transform: uppercase; font: 700 .8rem var(--font-head); letter-spacing: .04em; color: var(--lime-300); margin-bottom: 1.1rem; }
.hero h1 { font-weight: 300; font-size: clamp(2.2rem, 5vw, 4rem); letter-spacing: -.015em; line-height: 1.12; margin-bottom: 1.6rem; }
.hero h1 strong { font-weight: 700; }
.hero__text { max-width: 54ch; font-size: 1rem; color: rgba(255,255,255,.92); }
.hero__text strong { color: #fff; font-weight: 700; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }

.hero__logo { justify-self: center; text-align: center; width: min(100%, 440px); }
.hero__logo img { width: 100%; height: auto; filter: drop-shadow(0 10px 30px rgba(0,0,0,.25)); }
.lema { display: block; margin-top: .9rem; font: 400 clamp(.7rem, 1.6vw, 1rem)/1 var(--font-head); letter-spacing: .12em; text-transform: uppercase; }

/* ---------- Secciones ---------- */
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section--tight { padding-block: 1rem clamp(3rem, 6vw, 5rem); }
.section__head { text-align: center; max-width: 880px; margin: 0 auto clamp(2rem, 5vw, 3.5rem); }
.kicker { text-transform: uppercase; font: 700 .78rem var(--font-head); letter-spacing: .06em; margin-bottom: .9rem; }
.kicker--light { color: #fff; text-align: center; }
.kicker--grey { color: var(--muted); text-align: center; }
.section__head h2 { font-weight: 700; font-size: clamp(1.7rem, 3.6vw, 2.6rem); letter-spacing: -.01em; }

/* Tarjetas de servicios */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 3vw, 2.5rem); align-items: start; }
.card { text-align: center; }
.card img { width: 100%; border-radius: var(--radius); margin-bottom: 1.4rem; box-shadow: var(--shadow); transition: transform .4s; }
.card:hover img { transform: translateY(-4px); }
.card h3 { font-weight: 300; font-size: 1.3rem; line-height: 1.3; margin-bottom: .9rem; }
.card h3 strong { font-weight: 700; }
.card p { color: var(--ink-soft); font-size: .95rem; }

/* Detalle (logo con foto + lista) */
.detail { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.detail__logo {
  aspect-ratio: 1200 / 1000; width: min(100%, 460px); justify-self: center;
  background:
    linear-gradient(rgba(255,255,255,.3), rgba(255,255,255,.3)),
    url("assets/img/servicio-sistemas.png") center / cover;
  -webkit-mask: url("assets/img/logo-negro-sin-lema.png") center / contain no-repeat;
          mask: url("assets/img/logo-negro-sin-lema.png") center / contain no-repeat;
}
.detail__list { display: grid; gap: 1.6rem; }
.detail__list li { display: grid; grid-template-columns: 52px 1fr; gap: 1rem; align-items: start; color: var(--ink-soft); }
.detail__list li p { margin: 0; font-size: .98rem; }
.detail__list strong { color: var(--ink); font-weight: 700; }
.detail__list .i--lg { color: #1c2420; }
.detail__cta { display: block !important; padding-left: 68px; }

/* Bandas verdes */
.band { position: relative; isolation: isolate; color: #fff; padding: clamp(3rem, 7vw, 5rem) 0; overflow: hidden; }
.band__title { text-align: center; font-weight: 700; font-size: clamp(1.7rem, 3.6vw, 2.5rem); margin-bottom: 1.8rem; }
.band__lead { max-width: 900px; margin: 0 auto 2.5rem; text-align: center; font-size: .98rem; color: rgba(255,255,255,.92); }
.band--cobertura {
  background:
    radial-gradient(70% 140% at 100% 0%, rgba(94,224,56,.9) 0%, rgba(94,224,56,0) 60%),
    radial-gradient(60% 120% at 40% 130%, rgba(15,140,70,.9) 0%, rgba(15,140,70,0) 70%),
    linear-gradient(120deg, #03160d 0%, #06301b 100%);
}
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-top: 1.4rem; }
.chips li {
  min-width: 170px; text-align: center; padding: .8rem 1.6rem; border-radius: 14px; color: #111;
  font: 700 1.05rem var(--font-head);
  background: linear-gradient(180deg, #fff 0%, #dcdedc 100%);
  box-shadow: 0 6px 18px rgba(0,0,0,.28), inset 0 1px 0 #fff;
}

/* Clientes */
.section--clientes { padding-block: clamp(2.5rem, 6vw, 4rem); background: var(--paper); }
.logos { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 1.4rem clamp(1rem, 2.4vw, 2.2rem); margin-top: 2rem; }
.logos img { height: 56px; width: auto; max-width: 128px; object-fit: contain; transition: transform .25s; }
@media (min-width: 1100px) { .logos { flex-wrap: nowrap; } .logos img { max-width: 118px; } }
.logos li:hover img { transform: scale(1.08); }

/* Comparación */
.band--compara {
  background:
    radial-gradient(45% 80% at 100% 10%, rgba(94,224,56,.85) 0%, rgba(94,224,56,0) 70%),
    radial-gradient(40% 70% at 0% 100%, rgba(31,180,70,.35) 0%, rgba(31,180,70,0) 70%),
    linear-gradient(135deg, #021008 0%, #052e16 70%, #0b5a2c 100%);
}
.compare { display: grid; gap: 1rem; max-width: 1000px; margin-inline: auto; }
.compare__row {
  display: grid; grid-template-columns: 120px 1fr 120px; gap: 1rem; align-items: center;
  background: #fff; color: var(--ink); border-radius: 16px; padding: 1.1rem 1.2rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.25);
}
.compare__body { text-align: center; }
.compare__body h3 { font-weight: 700; font-size: 1.15rem; margin-bottom: .35rem; }
.compare__body p { margin: 0; font-size: .86rem; color: var(--ink-soft); line-height: 1.55; }
.compare__side {
  display: grid; place-items: center; gap: .15rem; text-align: center; padding: .6rem .4rem;
  border: 1px solid var(--line); border-radius: 10px; min-height: 64px; color: var(--muted);
  font: 600 .72rem var(--font-head);
}
.compare__side .i { width: 26px; height: 26px; stroke-width: 2.4; }
.i--x { color: #111; }
.i--ok { color: #fff; background: #0b0b0b; border-radius: 6px; padding: 3px; }
.compare__side--us { color: var(--muted); }
.partial { font: 700 .66rem var(--font-head); letter-spacing: .02em; text-transform: uppercase; color: var(--muted); }

/* Sobre nosotros */
.about { display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.about__photos { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.about__photos figure { margin: 0; position: relative; }
.about__photos img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 344 / 620; object-fit: cover; }
.about__photos figcaption {
  position: absolute; left: .7rem; right: .7rem; bottom: .7rem; padding: .5rem .8rem; border-radius: 12px;
  font: 400 .72rem/1.3 var(--font-head); color: #fff; background: rgba(6, 25, 15, .72); backdrop-filter: blur(6px);
}
.about__photos figcaption strong { display: block; font-size: .9rem; }

details { border-bottom: 1px solid var(--line); padding: .3rem 0; }
details:last-child { border-bottom: 0; }
summary {
  display: flex; align-items: center; gap: .8rem; cursor: pointer; list-style: none;
  font: 700 clamp(1.5rem, 3vw, 2rem)/1.3 var(--font-head); padding: .55rem 0;
}
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; font-weight: 400; width: 1.1em; text-align: center; transition: transform .25s; }
details[open] > summary::before { content: "–"; }
details p { margin: .2rem 0 1rem 2rem; font-size: .98rem; color: var(--ink-soft); }
details p strong { color: var(--ink); font-weight: 700; }

/* Contacto */
.section--contacto { background: var(--paper-2); }
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.contact__info h2 { font-weight: 300; font-size: clamp(1.9rem, 3.6vw, 2.7rem); margin-bottom: 1.2rem; }
.contact__info h2 strong { font-weight: 700; }
.contact__info > p { font-size: 1rem; }
.people { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.6rem 0; }
.person { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 1rem 1.1rem; display: grid; gap: .25rem; }
.person h3 { font-size: 1rem; font-weight: 700; }
.person a { font-size: .92rem; text-decoration: none; font-weight: 500; word-break: break-word; }
.person a:hover { text-decoration: underline; }
.person .wa { display: inline-flex; align-items: center; gap: .4rem; color: #0a7a30; font-weight: 600; }
.loc { font-size: .95rem; color: var(--ink-soft); }

.form { background: #fff; border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2.2rem); box-shadow: var(--shadow); display: grid; gap: 1.1rem; }
.field label { display: block; font: 500 .8rem var(--font-head); margin-bottom: .25rem; }
.field label span { color: #d12; }
.field input, .field textarea {
  width: 100%; border: 0; border-bottom: 1.5px solid #cfd5d1; background: transparent;
  padding: .55rem .1rem; font: 400 1rem var(--font-body); color: var(--ink); border-radius: 0; transition: border-color .2s;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field textarea:focus { outline: 0; border-color: var(--green-600); }
.field.has-error input, .field.has-error textarea { border-color: #d12; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: .4rem; }
.form__status { margin: 0; min-height: 1.4em; font-size: .92rem; font-weight: 500; }
.form__status.ok { color: #0a7a30; }
.form__status.err { color: #c0121f; }

/* Footer + flotantes */
.footer { background: #fff; border-top: 1px solid var(--line); padding: 1.4rem 1rem; text-align: center; font-size: .85rem; color: var(--ink-soft); }
.footer p { margin: 0; }
.fab {
  position: fixed; right: max(1.1rem, env(safe-area-inset-right, 0px)); z-index: 40; display: grid; place-items: center; border-radius: 14px;
  box-shadow: 0 8px 22px rgba(0,0,0,.28); transition: transform .2s, opacity .3s;
}
.fab:hover { transform: translateY(-3px); }
.fab--wa { bottom: 4.6rem; width: 56px; height: 56px; border-radius: 50%; background: #25d366; color: #fff; }
.fab--wa .i { width: 30px; height: 30px; }
.fab--up { bottom: 1.1rem; width: 44px; height: 44px; background: #000; color: #fff; opacity: 0; pointer-events: none; }
.fab--up.is-visible { opacity: 1; pointer-events: auto; }

/* Entrada suave al cargar: el contenido siempre queda visible en reposo */
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.reveal { animation: rise .7s ease both; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; text-align: left; }
  .hero__logo { order: -1; width: min(60%, 280px); justify-self: start; }
  .cards { grid-template-columns: 1fr; max-width: 520px; margin-inline: auto; }
  .detail { grid-template-columns: 1fr; }
  .detail__logo { width: min(80%, 340px); }
  .about { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .nav__toggle { display: flex; }
  .nav__menu {
    position: absolute; top: var(--nav-h); left: 0; right: 0; flex-direction: column; align-items: stretch;
    gap: 0; padding: .5rem 1rem 1.2rem; background: rgba(6, 22, 14, .97);
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity .2s, transform .2s, visibility .2s;
  }
  .nav__menu.is-open { opacity: 1; transform: none; visibility: visible; }
  .nav__menu a:not(.btn) { padding: .9rem .2rem; border-bottom: 1px solid rgba(255,255,255,.1); }
  .nav__menu .btn { margin-top: 1rem; }

  .compare__row { grid-template-columns: 1fr 1fr; grid-template-areas: "body body" "interno us"; }
  .compare__body { grid-area: body; }
  .compare__row > .compare__side:first-child { grid-area: interno; }
  .compare__side--us { grid-area: us; }
  .people { grid-template-columns: 1fr; }
  .detail__cta { padding-left: 0; }
  .detail__list li { grid-template-columns: 40px 1fr; }
  .i--lg { width: 36px; height: 36px; }
  details p { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero::before { animation: none; }
  .reveal { animation: none; }
  * { transition-duration: .01ms !important; }
}