/* ========================================
   SIMECOMF - Main Stylesheet
   Modern, Premium Design for Engineering Excellence
   ======================================== */

/* === CSS CUSTOM PROPERTIES (Design Tokens) === */
:root {
  /* Colors - Primary Palette (Identidad Corporativa SIMECOMF) */
  --color-primary: #004a99;
  /* Azul Cobalto Profundo - RGB(0, 74, 153) */
  --color-primary-light: #1a5fb3;
  /* Azul más claro para hover states */
  --color-primary-dark: #003a7a;
  /* Azul más oscuro para contraste */

  /* Colors - Secondary */
  --color-secondary: #425466;
  /* Gris Pizarra Industrial - RGB(66, 84, 102) */
  --color-secondary-light: #5a6a7d;
  /* Gris más claro */
  --color-secondary-dark: #2d3a47;
  /* Gris más oscuro */

  /* Colors - Accent (Conservamos uno para CTAs importantes) */
  --color-accent: #0066cc;
  /* Azul intermedio para acciones */
  --color-accent-light: #3399ff;
  --color-accent-dark: #004d99;

  /* Colors - Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f7fafc;
  --color-gray-100: #edf2f7;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e0;
  --color-gray-400: #a0aec0;
  --color-gray-500: #718096;
  --color-gray-600: #4a5568;
  --color-gray-700: #2d3748;
  --color-gray-800: #1a202c;
  --color-gray-900: #171923;

  /* Gradients - Ajustados a identidad corporativa */
  --gradient-primary: linear-gradient(135deg, #004a99 0%, #1a5fb3 100%);
  --gradient-secondary: linear-gradient(135deg, #425466 0%, #5a6a7d 100%);
  --gradient-accent: linear-gradient(135deg, #0066cc 0%, #3399ff 100%);
  --gradient-hero: linear-gradient(135deg, rgba(0, 74, 153, 0.95) 0%, rgba(26, 95, 179, 0.9) 100%);

  /* Typography */
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.375vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.65rem + 1.125vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 1.95rem + 1.5vw, 3rem);
  --text-5xl: clamp(3rem, 2.5rem + 2.5vw, 4rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(255, 107, 53, 0.3);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max-width: 1280px;
  --header-height: 80px;
}

/* === RESET & BASE STYLES === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-3xl);
}

h4 {
  font-size: var(--text-2xl);
}

h5 {
  font-size: var(--text-xl);
}

h6 {
  font-size: var(--text-lg);
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-secondary);
}

strong,
b {
  font-weight: 600;
}

/* === CONTAINER & LAYOUT === */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

.section-lg {
  padding: var(--space-24) 0;
}

/* === HEADER & NAVIGATION === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.98);
}

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-base);
}

.logo:hover {
  opacity: 0.85;
}

.logo img {
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
}

.nav-link {
  font-weight: 500;
  color: var(--color-gray-700);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--space-3);
  right: var(--space-3);
  height: 2px;
  background: var(--gradient-secondary);
  border-radius: var(--radius-full);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--gradient-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

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

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="60" height="60" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="60" height="60" patternUnits="userSpaceOnUse"><path d="M 60 0 L 0 0 0 60" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="60" height="60" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

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

.hero-content {
  max-width: 800px;
}

.hero-title {
  color: var(--color-white);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
  line-height: 1.7;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* === CARDS === */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
  height: 100%;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.card-glass {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.card-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xl);
  background: var(--gradient-primary);
  color: var(--color-white);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-5);
}

.card-icon.secondary {
  background: var(--gradient-secondary);
}

.card-icon.accent {
  background: var(--gradient-accent);
}

.card-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-3);
}

.card-description {
  color: var(--color-gray-600);
  margin-bottom: var(--space-5);
}

/* === GRID SYSTEM === */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === STATS SECTION === */
.stats {
  background: var(--gradient-primary);
  color: var(--color-white);
}

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

.stat-number {
  font-size: var(--text-5xl);
  font-weight: 800;
  color: var(--color-secondary);
  display: block;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-lg);
  opacity: 0.9;
}

/* === FOOTER === */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer-column h4 {
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--color-gray-400);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-secondary);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-700);
  text-align: center;
  color: var(--color-gray-500);
}

.social-links {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-gray-800);
  color: var(--color-gray-400);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-2px);
}

/* === WHATSAPP FLOAT BUTTON === */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 60px;
  height: 60px;
  background: #25D366;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
  z-index: 999;
  transition: all var(--transition-base);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(37, 211, 102, 0.5);
}

.whatsapp-float svg {
  width: 32px;
  height: 32px;
  fill: var(--color-white);
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
  }

  50% {
    box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
  }
}

.fade-in {
  animation: fadeInUp 0.8s ease-out;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .nav.active {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: var(--space-2);
  }

  .nav-link {
    width: 100%;
    padding: var(--space-3);
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .hero {
    min-height: 80vh;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .whatsapp-float {
    bottom: var(--space-6);
    right: var(--space-6);
    width: 50px;
    height: 50px;
  }

  .whatsapp-float svg {
    width: 26px;
    height: 26px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-12) 0;
  }
}