/* ==============================
   BRESUTI SRL - Sistema de Diseño
   ============================== */

/* Variables CSS */
:root {
  /* Colores de Marca */
  --color-primary: #0056b3;
  --color-primary-dark: #003d82;
  --color-primary-light: #3380c9;
  --color-secondary: #00a86b;
  --color-accent: #ff6b35;
  --color-accent-light: #ff8c5f;

  /* Colores Neutros */
  --color-white: #ffffff;
  --color-light: #f4f7fa;
  --color-gray-100: #e8ecef;
  --color-gray-300: #cbd5e0;
  --color-gray-500: #718096;
  --color-gray-700: #2d3748;
  --color-dark: #1a202c;
  --color-black: #000000;

  /* Tipografía */
  --font-primary:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Inter", sans-serif;

  /* Tamaños de Fuente */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);

  /* Bordes */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transiciones */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

/* Reset y Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  color: var(--color-gray-700);
  line-height: 1.6;
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

/* ==============================
   LAYOUT - Container
   ============================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section-padding {
  padding: var(--spacing-2xl) 0;
}

/* ==============================
   HEADER & NAVEGACIÓN
   ============================== */
.main-header {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-base);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

.nav-menu ul {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--color-gray-700);
  font-weight: 500;
  font-size: var(--text-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--color-primary);
}

.nav-link:hover::after {
  width: 80%;
}

.mobile-toggle {
  display: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
  background: none;
  border: none;
  padding: 0;
}

.mobile-toggle:hover {
  transform: rotate(90deg);
}

/* ==============================
   BOTONES
   ============================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(
    135deg,
    var(--color-primary-dark),
    var(--color-primary)
  );
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-secondary-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ==============================
   HERO SECTION
   ============================== */
.hero {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  color: var(--color-white);
  padding: 5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(
      circle at 20% 50%,
      rgba(255, 255, 255, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(255, 255, 255, 0.05) 0%,
      transparent 50%
    );
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: var(--text-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.95;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-btns {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==============================
   CARDS & GRID
   ============================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-100);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

.card-icon {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  display: inline-block;
  transition: transform var(--transition-base);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.card h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--spacing-sm);
}

.card p {
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* ==============================
   TIPOGRAFÍA
   ============================== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--text-3xl);
  position: relative;
  display: inline-block;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
}

.text-center h2::after {
  left: 50%;
  transform: translateX(-50%);
}

.text-accent {
  color: var(--color-accent);
}

.text-primary {
  color: var(--color-primary);
}

/* ==============================
   UTILIDADES DE FONDO
   ============================== */
.bg-white {
  background-color: var(--color-white);
}

.bg-light {
  background-color: var(--color-light);
}

.text-center {
  text-align: center;
}

/* ==============================
   FORMS
   ============================== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: var(--text-base);
  font-family: var(--font-primary);
  border: 2px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  background: var(--color-white);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
}

.form-control::placeholder {
  color: var(--color-gray-300);
}

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

/* ==============================
   FOOTER
   ============================== */
footer {
  background: var(--color-dark);
  color: var(--color-gray-300);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-md);
}

.footer-col ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-col a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-accent);
}

.footer-col i {
  margin-right: var(--spacing-xs);
}

.copyright {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

/* ==============================
   RESPONSIVE DESIGN
   ============================== */

/* Tablet */
@media (max-width: 768px) {
  :root {
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
    --spacing-2xl: 3rem;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    transition: left var(--transition-base);
    padding: var(--spacing-lg);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-menu ul {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav-link {
    display: block;
    padding: var(--spacing-sm);
  }

  .mobile-toggle {
    display: block;
  }

  .hero {
    padding: 3rem 0;
  }

  .hero-btns {
    flex-direction: column;
    align-items: stretch;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 480px) {
  :root {
    --text-4xl: 1.5rem;
    --text-3xl: 1.25rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero h1 {
    font-size: var(--text-3xl);
  }

  .btn {
    padding: 0.675rem 1.25rem;
    font-size: var(--text-sm);
  }
}

/* ==============================
   ANIMACIONES ADICIONALES
   ============================== */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Efecto de aparición suave al scroll */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==============================
   MEJORAS DE ACCESIBILIDAD
   ============================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Focus visible para accesibilidad */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ==============================
   OPTIMIZACIONES DE PERFORMANCE
   ============================== */
.card,
.btn,
.nav-link {
  will-change: transform;
}