/* =====================================================================
   ALGORITME LABS · Hoja de estilos
   Paleta y tipografía basadas en el manual de marca (morado #7433F1).
   ===================================================================== */

:root {
  --purple: #7433f1;
  --purple-dark: #4a1cb8;
  --purple-deep: #1a0b3d;
  --bg: #07050d;            /* fondo general */
  --bg-2: #0d0916;          /* fondo alterno */
  --panel: #100b1c;
  --line: rgba(116, 51, 241, .55);
  --line-soft: rgba(255, 255, 255, .08);
  --text: #f4f2fa;
  --muted: #b9b3c9;
  --muted-2: #7e7690;

  --font-head: "Montserrat", "Gotham", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Helvetica Neue", Helvetica, Arial, "Segoe UI", sans-serif;

  --container: 1200px;
  --radius: 2px;
  --header-h: 72px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-head); margin: 0; line-height: 1.1; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 15px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .15s;
  text-align: center;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--purple); color: #fff; border-color: var(--purple); }
.btn-primary:hover { background: #8449ff; border-color: #8449ff; }
.btn-outline { background: transparent; color: #fff; border-color: var(--purple); }
.btn-outline:hover { background: rgba(116, 51, 241, .18); }
.btn-sm { padding: 12px 22px; }
.btn-block { width: 100%; }

/* ---------- Cabecera ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 5, 13, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand img { height: 40px; width: auto; }

.main-nav { display: flex; align-items: center; gap: 34px; }
.main-nav > a:not(.btn) {
  font-family: var(--font-head);
  font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text); opacity: .9;
}
.main-nav > a:not(.btn):hover { color: var(--purple); opacity: 1; }

.nav-toggle {
  display: none; background: none; border: 0; padding: 8px; cursor: pointer;
  flex-direction: column; gap: 5px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; transition: .2s; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 110px;
  background:
    radial-gradient(ellipse 70% 90% at 50% -10%, rgba(116, 51, 241, .55), transparent 70%),
    linear-gradient(180deg, #1c0d3f 0%, #120a2a 45%, var(--bg) 100%);
  overflow: hidden;
}
.hero::before {
  /* patrón de isotipos muy sutil (como el fondo HOME-04 de los recursos) */
  content: ""; position: absolute; inset: 0;
  background: url("../img/isotipo-blanco.svg") 0 0/120px 120px repeat;
  opacity: .028; pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 100%);
          mask-image: linear-gradient(180deg, #000 0%, transparent 100%);
}
.hero .container { position: relative; }

.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-head); font-size: 13px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--text);
  margin-bottom: 36px;
}
.sq { width: 10px; height: 10px; background: var(--purple); display: inline-block; }

.hero h1 {
  font-size: clamp(40px, 6.2vw, 78px);
  font-weight: 800;
  letter-spacing: -.01em;
  text-transform: uppercase;
}
.hero h1 .accent { color: var(--purple); }

.lead {
  max-width: 720px;
  font-size: 19px;
  color: var(--muted);
  margin: 34px 0 40px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- Franja de áreas ---------- */
.areas-strip {
  background: var(--bg-2);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.areas-inner {
  display: grid; grid-template-columns: repeat(2, 1fr);
  min-height: 96px;
}
.area {
  display: flex; align-items: center; gap: 18px;
  padding: 22px 12px;
  font-family: var(--font-head); font-size: 13px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  transition: color .2s;
}
.area:hover { color: var(--purple); }
.pixicon { width: 44px; height: 44px; color: var(--purple); flex: none; }

/* ---------- Secciones ---------- */
.section { padding: 110px 0; }

.kicker {
  font-family: var(--font-head); font-size: 12px; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase; color: var(--purple);
  margin-bottom: 16px;
}
.section h2 {
  font-size: clamp(34px, 4.5vw, 56px);
  font-weight: 800; text-transform: uppercase; letter-spacing: -.01em;
}
.dots { display: flex; gap: 8px; margin-top: 16px; }
.dots i { width: 10px; height: 10px; background: var(--purple); display: block; }
.dots i:nth-child(2) { opacity: .7; }
.dots i:nth-child(3) { opacity: .45; }

.section-head {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end;
  margin-bottom: 56px;
}
.section-intro { color: var(--muted); font-size: 18px; padding-bottom: 6px; }

/* ---------- Tarjetas de servicio ---------- */
.card {
  position: relative;
  border: 1px solid var(--line);
  padding: 44px 48px 52px;
  margin-bottom: 40px;
  background: var(--panel);
  overflow: hidden;
}
.card-icon { width: 40px; height: 40px; margin-bottom: 40px; }
.card h3 {
  font-size: clamp(22px, 2.4vw, 28px); font-weight: 700; line-height: 1.25;
  margin-bottom: 30px;
}
.card-body { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; }
.card-text p { color: var(--muted); }
.card-text h3 + p { margin-top: 0; }
.card-body .card-text h3 { margin-bottom: 26px; }

/* Tarjeta IA: degradado morado */
.card-ia {
  background: linear-gradient(100deg, #1e0c48 0%, #2a1266 40%, #5a26d8 100%);
  border-color: rgba(255,255,255,.18);
}
.card-ia .card-icon { color: #c8b3ff; }
.card-ia .card-text p { color: #e6dffb; }

.checklist { list-style: none; margin: 0; padding: 0; align-self: start; }
.checklist li {
  position: relative;
  padding: 13px 0 13px 34px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text);
}
.checklist li:first-child { border-top: 1px solid var(--line-soft); }
.checklist li::before {
  content: ""; position: absolute; left: 4px; top: 50%; transform: translateY(-50%);
  width: 10px; height: 10px; background: var(--purple);
}
.card-ia .checklist li { border-color: rgba(255,255,255,.18); }
.card-ia .checklist li::before { background: #b899ff; }


/* ---------- Contacto ---------- */
.contact { background: var(--bg); border-top: 1px solid var(--line-soft); }
.contact-inner {
  display: grid; grid-template-columns: 1fr 1.25fr; gap: 64px; align-items: center;
}
.info-box {
  border: 1px solid var(--line);
  background: var(--panel);
}
.info-item { padding: 34px 40px; font-size: 18px; }
.info-item + .info-item { border-top: 1px solid var(--line-soft); }
.info-item h4 {
  font-family: var(--font-body); font-weight: 400; font-size: 15px;
  letter-spacing: .06em; text-transform: uppercase; color: var(--text); margin-bottom: 14px;
}
.info-item address, .info-item p { font-style: normal; color: var(--muted); }
.info-item a:hover { color: var(--purple); }


/* ---------- Pie ---------- */
.site-footer {
  border-top: 1px solid var(--line-soft);
  padding: 40px 0;
  background: var(--bg);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.footer-logo { height: 34px; width: auto; }
.footer-nav { display: flex; gap: 40px; flex-wrap: wrap; }
.footer-nav a { color: var(--muted-2); font-size: 15px; }
.footer-nav a:hover { color: var(--text); }
.copy { color: var(--muted-2); font-size: 14px; }

/* ---------- Animación de entrada (progresiva) ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 1024px) {
  .card-body { grid-template-columns: 1fr; gap: 36px; }
  .contact-inner { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 820px) {
  body { font-size: 16px; }
  .section { padding: 80px 0; }
  .hero { padding: 72px 0 84px; }
  .lead { font-size: 17px; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--line-soft);
    padding: 8px 24px 24px;
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav > a:not(.btn) { padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
  .main-nav .btn { margin-top: 18px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .areas-inner { grid-template-columns: 1fr; }
  .area { padding: 16px 0; border-bottom: 1px solid var(--line-soft); }
  .area:last-child { border-bottom: 0; }

  .section-head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; }
  .card { padding: 32px 24px 36px; margin-bottom: 24px; }
  .card-icon { margin-bottom: 28px; }

  .info-item { padding: 24px 22px; font-size: 16px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-nav { gap: 20px; }
}

@media (max-width: 420px) {
  .container { width: calc(100% - 32px); }
  .hero-actions .btn { width: 100%; }
}