/* =========================================================
   SER INTEGRAL CONSULTORÍA S.A.S — Hoja de estilos principal
   ========================================================= */

/* ---------- Variables globales ---------- */
:root {
  /* Colores corporativos — cámbialos aquí para actualizar toda la marca */
  --primary: #14324f;        /* azul corporativo oscuro (header, textos fuertes) */
  --primary-dark: #0b1f33;   /* azul aún más oscuro (hover, footer) */
  --secondary: #2f6fad;      /* azul medio (igual al degradado del logo) */
  --accent: #b8872b;         /* dorado/bronce — acento de conversión (CTAs) */
  --accent-dark: #96701f;
  --background: #f6f8fb;     /* fondo general de la página */
  --surface: #ffffff;        /* tarjetas, formularios */
  --surface-alt: #eef2f7;    /* franjas alternas */
  --text: #1c2530;
  --text-light: #5b6b7c;
  --border: #dfe6ee;
  --success: #1f8a4c;
  --error: #c0392b;

  --font-heading: 'Poppins', 'Segoe UI', Arial, sans-serif;
  --font-body: 'Inter', 'Segoe UI', Arial, sans-serif;

  --radius: 10px;
  --shadow-sm: 0 2px 8px rgba(11, 31, 51, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 31, 51, 0.12);
  --shadow-lg: 0 16px 40px rgba(11, 31, 51, 0.16);

  --header-height: 84px;
  --header-height-scrolled: 64px;
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

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

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

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--primary);
  line-height: 1.25;
  margin: 0 0 0.6em;
}

p { margin: 0 0 1em; color: var(--text-light); text-align: justify; text-justify: inter-word; }

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 96px 0; }

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-header .eyebrow {
  display: inline-block;
  color: var(--secondary);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 12px;
}

.section-header h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }

.section-header p { margin-top: 12px; text-align: center; }

.section-alt { background: var(--surface-alt); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--accent-dark); box-shadow: var(--shadow-md); }

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.6);
  color: inherit;
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.12); }

.btn-secondary {
  background: var(--primary);
  color: #ffffff;
}
.btn-secondary:hover { background: var(--primary-dark); }

.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(11, 31, 51, 0.06);
  transition: box-shadow var(--transition), height var(--transition);
}

.site-header.is-scrolled { box-shadow: var(--shadow-sm); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  transition: height var(--transition);
}

.site-header.is-scrolled .header-inner { height: var(--header-height-scrolled); }

.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 44px; width: auto; transition: height var(--transition); }
.site-header.is-scrolled .brand img { height: 36px; }

.main-nav { display: flex; align-items: center; gap: 6px; }

.main-nav a.nav-link {
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text);
  transition: background var(--transition), color var(--transition);
}

.main-nav a.nav-link:hover,
.main-nav a.nav-link.active {
  background: var(--surface-alt);
  color: var(--secondary);
}

.nav-app-btn {
  margin-left: 8px;
  background: var(--primary);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.nav-app-btn:hover { background: var(--primary-dark) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #ffffff;
  padding: 100px 0;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.hero-text .eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.8rem;
  font-weight: 600;
  color: #cfe0f0;
  margin-bottom: 18px;
}

.hero-text h1 {
  color: #ffffff;
  font-size: clamp(2rem, 4vw, 2.9rem);
  margin-bottom: 18px;
}

.hero-text p.lead {
  color: #dbe6f0;
  font-size: 1.1rem;
  max-width: 540px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 32px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 48px;
  max-width: 520px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius);
  padding: 18px 16px;
  text-align: left;
}

.stat-card .stat-number {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  display: block;
}

.stat-card .stat-label {
  font-size: 0.82rem;
  color: #c4d5e4;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual .visual-frame {
  width: 100%;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.18);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-visual .visual-frame img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---------- Quiénes somos ---------- */
.about-banner {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--primary);
  margin-bottom: 48px;
}

.about-banner img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.about-content { max-width: 820px; }

.about-content .badge-framework {
  display: inline-block;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  color: var(--text-light);
  font-size: 0.82rem;
  padding: 8px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.about-list { margin-top: 22px; display: grid; gap: 14px; }

.about-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--text);
  font-weight: 500;
}

.about-list li svg { flex-shrink: 0; color: var(--secondary); margin-top: 3px; }

/* ---------- Métodología ---------- */
.methodology-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.methodology-steps .step {
  padding: 32px 20px;
  color: #fff;
  text-align: center;
}

.methodology-steps .step .step-number {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  display: block;
  margin-bottom: 8px;
  opacity: 0.85;
}

.methodology-steps .step:nth-child(1) { background: var(--primary-dark); }
.methodology-steps .step:nth-child(2) { background: var(--primary); }
.methodology-steps .step:nth-child(3) { background: var(--secondary); }
.methodology-steps .step:nth-child(4) { background: #4f8fc7; }

.modalities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.modality-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.modality-card .modality-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-alt);
  color: var(--secondary);
  font-weight: 700;
  margin-bottom: 14px;
}

/* ---------- Misión y visión ---------- */
.mv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.mv-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid var(--secondary);
}

.mv-card:nth-child(2) { border-top-color: var(--accent); }

.mv-card .mv-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--surface-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary);
  margin-bottom: 20px;
}

.mv-card:nth-child(2) .mv-icon { color: var(--accent); }

/* ---------- Servicios ---------- */
.services-groups { display: grid; gap: 48px; }

.service-group-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.service-group-title .group-index {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-heading);
  flex-shrink: 0;
}

.service-group-title h3 { margin: 0; font-size: 1.2rem; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}

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

.service-card .service-tag {
  align-self: flex-start;
  background: var(--surface-alt);
  color: var(--secondary);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 5px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
}

.service-card h4 { font-size: 1.05rem; margin-bottom: 10px; }

.service-card p { flex: 1; font-size: 0.92rem; margin-bottom: 18px; }

.service-card .service-link {
  color: var(--secondary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-card .service-link svg { transition: transform var(--transition); }
.service-card .service-link:hover svg { transform: translateX(3px); }

/* ---------- Diferenciales ---------- */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}

.diff-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.diff-card .diff-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--surface-alt);
  color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.diff-card h4 { font-size: 1rem; margin-bottom: 8px; }
.diff-card p { font-size: 0.88rem; margin-bottom: 0; text-align: center; }

/* ---------- Resultados ---------- */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}

.result-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px;
  border-left: 3px solid var(--accent);
}

.result-card svg { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.result-card h4 { font-size: 0.98rem; margin-bottom: 6px; }
.result-card p { font-size: 0.87rem; margin-bottom: 0; }

/* ---------- Aplicativo de inventarios ---------- */
.app-section {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary));
  color: #fff;
  border-radius: 24px;
  margin: 0 24px;
  max-width: 1180px;
  margin-inline: auto;
  padding: 72px 48px;
}

.app-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.app-inner h2 { color: #fff; }
.app-inner p { color: #d7e3ee; }

.app-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 28px; }

.app-visual {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 16px;
  padding: 32px;
  display: grid;
  gap: 16px;
}

.app-visual .app-feature {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 0.9rem;
  color: #e4edf5;
}

.app-visual .app-feature svg { color: var(--accent); flex-shrink: 0; margin-top: 2px; }

/* ---------- Formularios ---------- */
.forms-section .container { max-width: 1000px; }

.form-card {
  background: var(--surface);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: 44px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field.full { grid-column: 1 / -1; }

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.form-field label .required { color: var(--error); margin-left: 3px; }

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--background);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(47, 111, 173, 0.15);
}

.form-field textarea { resize: vertical; min-height: 110px; }

.form-field input.field-error,
.form-field select.field-error,
.form-field textarea.field-error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.12);
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.form-checkbox input { margin-top: 4px; }

.form-footer {
  margin-top: 26px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.form-message {
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 8px;
  display: none;
}

.form-message.show { display: inline-block; }
.form-message.success { background: rgba(31, 138, 76, 0.12); color: var(--success); }
.form-message.error { background: rgba(192, 57, 43, 0.12); color: var(--error); }

/* ---------- Contacto ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info { display: grid; gap: 20px; align-content: start; }

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}

.contact-item svg { color: var(--secondary); flex-shrink: 0; margin-top: 2px; }
.contact-item strong { display: block; color: var(--text); font-size: 0.92rem; }
.contact-item span { font-size: 0.88rem; color: var(--text-light); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--primary-dark);
  color: #cfd9e2;
  padding: 72px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand img { height: 40px; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand p { color: #9fb0c0; font-size: 0.9rem; }

.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.footer-social a:hover { background: var(--secondary); }

.footer-col h5 {
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul { display: grid; gap: 12px; }
.footer-col a, .footer-col span { color: #b7c4d1; font-size: 0.9rem; transition: color var(--transition); }
.footer-col a:hover { color: #fff; }

.footer-app-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  color: var(--accent) !important;
  font-weight: 600;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.82rem;
  color: #8ea0b2;
}

.footer-bottom a { color: #8ea0b2; }
.footer-bottom a:hover { color: #fff; }
.footer-legal { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- WhatsApp flotante ---------- */
.whatsapp-float {
  position: fixed;
  bottom: 26px;
  right: 26px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25d366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 900;
  transition: transform var(--transition);
}
.whatsapp-float:hover { transform: scale(1.08); }
.whatsapp-float svg { width: 28px; height: 28px; color: #fff; }

/* ---------- Botón volver arriba ---------- */
.back-to-top {
  position: fixed;
  bottom: 26px;
  right: 96px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 900;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--secondary); }

/* ---------- Animaciones al hacer scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; width: 100%; max-width: 420px; margin: 0 auto; }
  .app-inner { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  .main-nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 24px;
    box-shadow: var(--shadow-md);
  }
  .main-nav.is-open a.nav-link { padding: 14px 10px; }
  .main-nav.is-open .nav-app-btn { margin: 8px 0 0; text-align: center; }

  .methodology-steps { grid-template-columns: repeat(2, 1fr); }
  .modalities-grid { grid-template-columns: 1fr; }
  .mv-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  section { padding: 64px 0; }
  .hero { padding: 64px 0; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .app-section { margin: 0 16px; padding: 48px 24px; }
  .back-to-top { right: 20px; bottom: 96px; }
  .whatsapp-float { right: 20px; bottom: 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}