/* ============================================
   ActiveSIF Landing — styles.css
   Paleta corporativa del proyecto existente
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --dark-teal: #003e44;
  --teal: #6fafb2;
  --teal-light: #e8f4f5;
  --orange: #fa8d04;
  --orange-dark: #ff6400;
  --navy: #262a69;
  --red-accent: #ef473e;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1200px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

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

img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Header / Nav --- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo { height: 40px; width: auto; }

.header__nav { display: flex; align-items: center; gap: 2rem; }
.header__nav a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--gray-600);
  transition: color var(--transition);
}
.header__nav a:hover { color: var(--dark-teal); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .625rem 1.5rem;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--orange);
  color: var(--white);
}
.btn--primary:hover { background: var(--orange-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn--outline {
  background: transparent;
  color: var(--dark-teal);
  border: 2px solid var(--dark-teal);
}
.btn--outline:hover { background: var(--dark-teal); color: var(--white); }

.btn--white {
  background: var(--white);
  color: var(--dark-teal);
}
.btn--white:hover { background: var(--gray-100); transform: translateY(-1px); }

.btn--large { padding: .875rem 2rem; font-size: 1rem; }

/* Mobile menu toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--gray-700);
  margin: 5px 0;
  transition: var(--transition);
}

/* --- Hero --- */
.hero {
  padding: 10rem 0 6rem;
  background: linear-gradient(135deg, var(--dark-teal) 0%, var(--navy) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(111,175,178,.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero__content {
  max-width: 680px;
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .375rem 1rem;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 100px;
  font-size: .8125rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--teal);
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}

.hero h1 .highlight { color: var(--orange); }

.hero__subtitle {
  font-size: 1.25rem;
  font-weight: 400;
  color: rgba(255,255,255,.8);
  margin-bottom: 1rem;
}

.hero__desc {
  font-size: 1.0625rem;
  color: rgba(255,255,255,.65);
  margin-bottom: 2.5rem;
  max-width: 560px;
}

.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* --- Section shared --- */
.section {
  padding: 5rem 0;
}
.section--gray { background: var(--gray-50); }
.section--dark {
  background: linear-gradient(135deg, var(--dark-teal) 0%, var(--navy) 100%);
  color: var(--white);
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}

.section__label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--orange);
  margin-bottom: .75rem;
}

.section__title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section--dark .section__title { color: var(--white); }

.section__subtitle {
  font-size: 1.0625rem;
  color: var(--gray-500);
  line-height: 1.6;
}
.section--dark .section__subtitle { color: rgba(255,255,255,.65); }

/* --- Pilares ACTIVE --- */
.pilares-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.pilar-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.pilar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--teal);
}

.pilar-card__letter {
  font-size: 3rem;
  font-weight: 900;
  color: var(--dark-teal);
  line-height: 1;
  margin-bottom: .25rem;
}

.pilar-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: .5rem;
}

.pilar-card__desc {
  font-size: .9375rem;
  color: var(--gray-500);
  line-height: 1.5;
}

.pilar-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--dark-teal), var(--teal));
  opacity: 0;
  transition: opacity var(--transition);
}
.pilar-card:hover::after { opacity: 1; }

/* --- Modulos --- */
.modulos-section { display: flex; flex-direction: column; gap: 3rem; }

.modulos-group__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.modulos-group__title .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.dot--available { background: var(--teal); }
.dot--soon { background: var(--orange); }

.modulos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.modulo-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.modulo-card:hover { border-color: var(--teal); box-shadow: var(--shadow-sm); }

.modulo-card__icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}
.modulo-card__icon--available { background: var(--teal-light); color: var(--dark-teal); }
.modulo-card__icon--soon { background: #fff7ed; color: var(--orange); }

.modulo-card__name {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: .25rem;
}

.modulo-card__desc {
  font-size: .8125rem;
  color: var(--gray-500);
  line-height: 1.4;
}

.modulo-card__badge {
  display: inline-block;
  font-size: .6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: .125rem .5rem;
  border-radius: 100px;
  margin-top: .375rem;
}
.modulo-card__badge--soon {
  background: #fff7ed;
  color: var(--orange-dark);
}

/* --- Cumplimiento --- */
.cumplimiento-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.cumplimiento-text h3 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.cumplimiento-text p {
  font-size: 1rem;
  color: var(--gray-500);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.cumplimiento-list {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.cumplimiento-list li {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  font-size: .9375rem;
  color: var(--gray-700);
}

.cumplimiento-list .check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  background: var(--teal-light);
  color: var(--dark-teal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  font-weight: 700;
  margin-top: 2px;
}

.cumplimiento-visual {
  background: linear-gradient(135deg, var(--dark-teal), var(--navy));
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  color: var(--white);
  text-align: center;
}

.cumplimiento-visual__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.cumplimiento-visual h4 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: .5rem;
}

.cumplimiento-visual p {
  font-size: .9375rem;
  color: rgba(255,255,255,.7);
  line-height: 1.5;
}

/* --- Casos de uso --- */
.casos-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.caso-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  transition: all var(--transition);
}
.caso-card:hover {
  background: rgba(255,255,255,.1);
  transform: translateY(-3px);
}

.caso-card__icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.caso-card h4 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: .75rem;
}

.caso-card p {
  font-size: .875rem;
  color: rgba(255,255,255,.65);
  line-height: 1.6;
}

/* --- Diferenciadores --- */
.diferenciadores-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.diferenciador-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.diferenciador-item__number {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--teal-light);
  color: var(--dark-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
}

.diferenciador-item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: .25rem;
}

.diferenciador-item p {
  font-size: .9375rem;
  color: var(--gray-500);
  line-height: 1.5;
}

/* --- CTA final / Contacto --- */
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contacto-info h3 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 1rem;
}

.contacto-info p {
  font-size: 1rem;
  color: var(--gray-500);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contacto-dato {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.contacto-dato__icon {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  background: var(--teal-light);
  color: var(--dark-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.contacto-dato__label {
  font-size: .8125rem;
  color: var(--gray-500);
}

.contacto-dato__value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-800);
}

.contacto-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: .375rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: .75rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: var(--font-primary);
  font-size: .9375rem;
  color: var(--gray-800);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(111,175,178,.15);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-status {
  margin-top: .75rem;
  font-size: .875rem;
  font-weight: 500;
}
.form-status--success { color: #16a34a; }
.form-status--error { color: var(--red-accent); }

/* --- Footer --- */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 3.5rem 0 1.5rem;
}

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__brand p {
  font-size: .9375rem;
  color: var(--gray-500);
  margin-top: 1rem;
  max-width: 320px;
  line-height: 1.6;
}

.footer__logo {
  height: 36px;
  filter: brightness(0) invert(1);
}

.footer__col h5 {
  font-size: .8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

.footer__col a {
  display: block;
  font-size: .875rem;
  color: var(--gray-400);
  margin-bottom: .625rem;
  transition: color var(--transition);
}
.footer__col a:hover { color: var(--white); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8125rem;
  color: var(--gray-500);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .pilares-grid { grid-template-columns: repeat(2, 1fr); }
  .casos-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .header__nav { display: none; }
  .header__nav.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--white);
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
    gap: 1rem;
  }
  .mobile-toggle { display: block; }

  .hero { padding: 8rem 0 4rem; }
  .hero h1 { font-size: 2.25rem; }
  .hero__subtitle { font-size: 1.0625rem; }
  .hero__actions { flex-direction: column; }

  .section { padding: 3.5rem 0; }
  .section__title { font-size: 1.75rem; }

  .pilares-grid { grid-template-columns: 1fr; }
  .cumplimiento-content { grid-template-columns: 1fr; }
  .casos-grid { grid-template-columns: 1fr; }
  .diferenciadores-grid { grid-template-columns: 1fr; }
  .contacto-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; gap: .75rem; text-align: center; }
}

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}