/* ==========================================================================
   CSS Reset & Variables
   ========================================================================== */
:root {
  /* Colors */
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #60A5FA;
  --color-secondary: #0F172A;
  --color-accent: #10B981;
  --color-accent-dark: #059669;
  
  --color-bg-main: #FFFFFF;
  --color-bg-light: #F8FAFC;
  --color-bg-dark: #1E293B;
  
  --color-text-main: #1E293B;
  --color-text-muted: #64748B;
  --color-text-light: #F8FAFC;
  
  --color-border: #E2E8F0;
  
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  --color-info: #3B82F6;

  /* Typography */
  --font-main: 'Inter', sans-serif;
  
  /* 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);
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  font-size: 1rem;
  overflow-x: hidden;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

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

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

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

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

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

.section-dark {
  background-color: var(--color-secondary);
  color: var(--color-text-light);
}

.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4, .section-dark h5, .section-dark h6 {
  color: var(--color-text-light);
}

.section-dark p {
  color: #94A3B8;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.section-header .subtitle {
  color: var(--color-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  display: block;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-bg-main);
  z-index: 1000;
  transition: box-shadow var(--transition-fast), padding var(--transition-fast);
  padding: 1rem 0;
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  padding: 0.5rem 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-main);
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--color-secondary);
  margin-bottom: 5px;
  transition: var(--transition-normal);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 8rem 0 5rem;
  background: linear-gradient(to right bottom, var(--color-bg-light), #E0E7FF);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
}

.hero-text h1 span {
  color: var(--color-primary);
}

.hero-text p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  max-width: 90%;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}

.hero-image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

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

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

.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background-color: #1E293B;
  color: white;
}

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

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

.btn-accent {
  background-color: var(--color-accent);
  color: white;
}

.btn-accent:hover {
  background-color: var(--color-accent-dark);
  color: white;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-block {
  display: block;
  width: 100%;
}

/* ==========================================================================
   Service Cards
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--color-bg-main);
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: #EFF6FF;
  color: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.service-card h3 {
  margin-bottom: 1rem;
}

/* ==========================================================================
   Product Cards
   ========================================================================== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.product-card {
  background: var(--color-bg-main);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.product-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: var(--color-bg-light);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--color-accent);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.product-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.product-features {
  margin-bottom: 1.5rem;
  flex: 1;
}

.product-features li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.product-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

.product-actions {
  display: flex;
  gap: 1rem;
}

/* ==========================================================================
   Portfolio Cards
   ========================================================================== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.portfolio-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  group: hover;
}

.portfolio-image {
  height: 250px;
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.2));
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.1);
}

.portfolio-card:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay h3 {
  color: white;
  margin-bottom: 0.5rem;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.portfolio-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
  transition-delay: 50ms;
}

.portfolio-card:hover .portfolio-overlay h3,
.portfolio-card:hover .portfolio-tags {
  transform: translateY(0);
}

.tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  backdrop-filter: blur(4px);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.stat-item h4 {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  background: var(--color-bg-main);
  padding: 3rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.contact-info-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  background: var(--color-bg-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-secondary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-text-light);
  padding: 5rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 1rem;
  display: block;
}

.footer-logo span {
  color: var(--color-primary-light);
}

.footer-widget h4 {
  color: white;
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: #94A3B8;
}

.footer-links a:hover {
  color: white;
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #94A3B8;
  font-size: 0.875rem;
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-links a {
  color: #94A3B8;
}

.footer-bottom-links a:hover {
  color: white;
}

/* ==========================================================================
   Components (WhatsApp, Back to Top, Alerts, Loading)
   ========================================================================== */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background-color: #25D366;
  color: white;
  border-radius: 50px;
  text-align: center;
  font-size: 30px;
  box-shadow: 2px 2px 3px #999;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse-green 2s infinite;
}

.whatsapp-float:hover {
  background-color: #128C7E;
  color: white;
}

@keyframes pulse-green {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.back-to-top {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 40px;
  height: 40px;
  background-color: var(--color-secondary);
  color: white;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 99;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-primary);
  color: white;
}

.alert {
  padding: 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  border-left: 4px solid;
}

.alert-success { background: #ECFDF5; color: #065F46; border-color: var(--color-success); }
.alert-error { background: #FEF2F2; color: #991B1B; border-color: var(--color-danger); }
.alert-info { background: #EFF6FF; color: #1E40AF; border-color: var(--color-info); }

.loader {
  border: 3px solid var(--color-bg-light);
  border-radius: 50%;
  border-top: 3px solid var(--color-primary);
  width: 24px;
  height: 24px;
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.fw-bold { font-weight: 700; }
.fw-semibold { font-weight: 600; }

.mt-1 { margin-top: 0.25rem; } .mt-2 { margin-top: 0.5rem; } .mt-3 { margin-top: 1rem; } .mt-4 { margin-top: 1.5rem; } .mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.25rem; } .mb-2 { margin-bottom: 0.5rem; } .mb-3 { margin-bottom: 1rem; } .mb-4 { margin-bottom: 1.5rem; } .mb-5 { margin-bottom: 3rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; } .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; } .py-3 { padding-top: 1rem; padding-bottom: 1rem; } .py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; } .py-5 { padding-top: 3rem; padding-bottom: 3rem; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-text h1 { font-size: 2.75rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-content, .about-grid, .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero { padding-top: 6rem; text-align: center; }
  .hero-text p { margin: 0 auto 2rem; }
  .hero-buttons { justify-content: center; }
  
  .mobile-menu-btn { display: block; }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--color-bg-main);
    flex-direction: column;
    padding: 2rem;
    transition: left var(--transition-normal);
  }
  
  .nav-links.active { left: 0; }
  
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}