/* ==========================================================================
   IMPSA S.A — Hoja de estilos institucional
   ========================================================================== */

:root {
  --white: #ffffff;
  --gray-50: #f4f5f7;
  --gray-100: #e7e9ed;
  --gray-200: #d3d7dd;
  --gray-400: #9aa3af;
  --gray-600: #5c6572;
  --gray-800: #2b3138;
  --navy-900: #0b1d33;
  --navy-800: #12253f;
  --navy-700: #17304f;
  --blue-500: #1e6fff;
  --blue-400: #4d8bff;

  --font-base: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --container: 1160px;
  --radius: 4px;
  --shadow-sm: 0 1px 3px rgba(11, 29, 51, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 29, 51, 0.12);
  --transition: 180ms ease;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  margin: 0 0 16px;
  color: var(--navy-900);
  line-height: 1.25;
  font-weight: 800;
}

p { margin: 0 0 16px; }

ul { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 88px 0;
  border-top: 1px solid var(--gray-100);
}

.section--muted { background: var(--gray-50); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-500);
  margin-bottom: 12px;
}

.section-header {
  max-width: 680px;
  margin: 0 0 48px;
}

.section-header p {
  color: var(--gray-600);
  font-size: 17px;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 15px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.btn--primary {
  background: var(--blue-500);
  color: var(--white);
}
.btn--primary:hover { background: #1a5fe0; transform: translateY(-1px); }

.btn--outline {
  background: transparent;
  border-color: var(--navy-900);
  color: var(--navy-900);
}
.btn--outline:hover { background: var(--navy-900); color: var(--white); }

.btn--outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--white);
}
.btn--outline-light:hover { background: var(--white); color: var(--navy-900); border-color: var(--white); }

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(6px);
  border-bottom: 1px solid var(--gray-100);
}

.header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.header__logo { display: block; height: 40px; }
.header__logo img { height: 100%; width: auto; }

.nav { display: flex; align-items: center; gap: 40px; }

.nav__list { display: flex; align-items: center; gap: 32px; }

.nav__list a {
  font-weight: 600;
  font-size: 15px;
  color: var(--navy-900);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.nav__list a:hover { border-color: var(--blue-500); }

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav__toggle span {
  display: block;
  height: 2px;
  width: 20px;
  margin: 0 auto;
  background: var(--navy-900);
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-800) 55%, var(--navy-700) 100%);
  color: var(--white);
  padding: 120px 0 96px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  max-width: 720px;
}

.hero .eyebrow { color: var(--blue-400); }

.hero h1 {
  color: var(--white);
  font-size: clamp(32px, 4.2vw, 48px);
  margin-bottom: 20px;
}

.hero p {
  font-size: 18px;
  color: var(--gray-200);
  max-width: 600px;
  margin-bottom: 36px;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- Empresa ---------- */
.empresa__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.empresa__facts {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 32px;
}

.empresa__facts dt {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-600);
  font-weight: 700;
  margin-bottom: 4px;
}

.empresa__facts dd {
  margin: 0 0 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy-900);
}

.empresa__facts div:last-child dd { margin-bottom: 0; }

/* ---------- Actividad ---------- */
.actividad__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--gray-200);
}

.card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: var(--navy-900);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.card__icon svg { width: 26px; height: 26px; }

.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--gray-600); font-size: 15px; margin-bottom: 0; }

.actividad__note {
  margin-top: 32px;
  font-size: 14px;
  color: var(--gray-600);
  border-left: 3px solid var(--blue-500);
  padding-left: 16px;
}

/* ---------- Contacto ---------- */
.contacto__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
}

.contacto__info h2 { font-size: 24px; }

.contacto__info address {
  font-style: normal;
  color: var(--gray-800);
  margin-bottom: 24px;
  line-height: 1.7;
}

.contacto__info address strong {
  display: block;
  color: var(--navy-900);
  font-size: 18px;
  margin-bottom: 8px;
}

.contacto__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.contacto__item .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-600);
  font-weight: 700;
  display: block;
  margin-bottom: 2px;
}

.contacto__item .value {
  font-weight: 600;
  color: var(--navy-900);
}

.form {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 32px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form__group { margin-bottom: 20px; }

.form__group label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 6px;
}

.form__group input,
.form__group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 15px;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(30, 111, 255, 0.15);
}

.form__group textarea { resize: vertical; min-height: 120px; }

.form__status {
  margin-top: 12px;
  font-size: 14px;
  color: var(--gray-600);
  min-height: 20px;
}

.form__status--ok { color: #157a45; }
.form__status--error { color: #b3261e; }

/* ---------- Footer ---------- */
.footer {
  background: var(--navy-900);
  color: var(--gray-200);
  padding: 64px 0 28px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 0.9fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer__logo { display: block; height: 36px; margin-bottom: 20px; }
.footer__logo img { height: 100%; width: auto; }

.footer__legal {
  font-size: 15px;
  line-height: 1.8;
}

.footer__legal strong {
  display: block;
  color: var(--white);
  font-size: 17px;
  margin-bottom: 10px;
}

.footer__legal .cuit { color: var(--blue-400); font-weight: 700; }

.footer h4 {
  color: var(--white);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.footer__list li { margin-bottom: 12px; }
.footer__list a {
  font-size: 15px;
  color: var(--gray-200);
  transition: color var(--transition);
}
.footer__list a:hover { color: var(--blue-400); }

.footer__bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--gray-400);
}

/* ---------- Páginas legales ---------- */
.legal {
  padding: 64px 0 96px;
}

.legal__intro {
  color: var(--gray-600);
  font-size: 15px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-100);
}

.legal h2 {
  font-size: 22px;
  margin-top: 40px;
}

.legal h2:first-of-type { margin-top: 0; }

.legal p, .legal li { color: var(--gray-800); font-size: 16px; }

.legal ul { list-style: disc; padding-left: 22px; margin-bottom: 16px; }
.legal li { margin-bottom: 8px; }

.legal__box {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 24px;
  margin: 24px 0;
}

.legal__box strong { display: block; color: var(--navy-900); margin-bottom: 6px; }

.page-hero {
  background: var(--navy-900);
  color: var(--white);
  padding: 56px 0;
}
.page-hero h1 { color: var(--white); font-size: 30px; margin-bottom: 8px; }
.page-hero p { color: var(--gray-200); margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .empresa__grid,
  .contacto__grid { grid-template-columns: 1fr; }
  .actividad__grid { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav__list, .nav .hero__actions { display: none; }
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 24px 20px;
    box-shadow: var(--shadow-sm);
  }
  .nav.is-open { display: flex; }
  .nav.is-open .nav__list {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .nav__list a { display: block; padding: 12px 0; border-bottom: 1px solid var(--gray-100); }
  .nav__toggle { display: flex; }

  .hero { padding: 88px 0 64px; }
  .section { padding: 64px 0; }

  .actividad__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .form__row { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}