:root {
  --primary: #f59e0b;      /* Construction Orange/Yellow */
  --primary-dark: #b45309;
  --primary-light: #fef3c7;
  --secondary: #10b981;    /* Solar Tech Green */
  --accent: #3b82f6;       /* Blue for contrast/tech */
  --accent-dark: #1d4ed8;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --light: #f8fafc;
  --gray: #94a3b8;
  --gray-light: #e2e8f0;
  --tech-gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  --tech-gradient-reverse: linear-gradient(135deg, var(--secondary), var(--primary));
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Poppins", sans-serif; color: var(--dark); background-color: var(--light); overflow-x: hidden; line-height: 1.6; }
h1, h2, h3, h4, h5, h6 { font-family: "Orbitron", sans-serif; font-weight: 600; line-height: 1.2; margin-bottom: 1rem; }
p { margin-bottom: 1.5rem; color: var(--gray); text-align: left; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0; position: relative; overflow: hidden; }
.section-title { text-align: center; margin-bottom: 3.5rem; }
.section-title h6 { color: var(--primary); font-size: 0.875rem; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 1rem; display: inline-block; position: relative; }
.section-title h6::after { content: ""; position: absolute; width: 40px; height: 2px; background: var(--tech-gradient); bottom: -8px; left: 50%; transform: translateX(-50%); }
.section-title h2 { font-size: 2.5rem; color: var(--dark); margin-bottom: 1.5rem; }
.section-title p { max-width: 600px; margin-left: auto; margin-right: auto; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.75rem 1.75rem; border-radius: 50px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; transition: var(--transition); cursor: pointer; border: none; outline: none; position: relative; overflow: hidden; z-index: 1; }
.btn-primary { background: var(--tech-gradient); color: white; box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: white; }
.btn-group { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Header */
header { position: fixed; width: 100%; top: 0; left: 0; z-index: 1000; transition: var(--transition); padding: 1rem 0; background: rgba(15, 23, 42, 0.9); backdrop-filter: blur(10px); }
header.scrolled { padding: 0.75rem 0; box-shadow: var(--shadow-lg); background: rgba(15, 23, 42, 0.98); }
.navbar { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.75rem; font-weight: 700; color: white; display: flex; align-items: center; gap: 0.75rem; }
.logo i { color: var(--primary); font-size: 1.5rem; }
.nav-links { display: flex; gap: 2rem; align-items: center; }
.nav-links > li > a { color: white; font-weight: 500; position: relative; padding: 0.5rem 0; }
.nav-links > li > a::after { content: ""; position: absolute; width: 0; height: 2px; background: var(--primary); bottom: 0; left: 0; transition: var(--transition); }
.nav-links > li > a:hover::after { width: 100%; }
.nav-links a:hover { color: var(--primary); }

/* Dropdown Menu */
.dropdown { position: relative; }
.dropdown-menu { 
  position: absolute; 
  top: 100%; 
  left: 0; 
  min-width: 250px; 
  background: rgba(15, 23, 42, 0.95); 
  backdrop-filter: blur(15px); 
  border: 1px solid rgba(255,255,255,0.1); 
  border-radius: var(--border-radius-lg); 
  padding: 1rem 0; 
  box-shadow: var(--shadow-xl); 
  opacity: 0; 
  visibility: hidden; 
  transform: translateY(10px); 
  transition: all 0.3s ease; 
  z-index: 1001;
}
.dropdown:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-header { color: var(--gray); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; padding: 0.5rem 1.5rem; margin-top: 0.5rem; }
.dropdown-header:first-child { margin-top: 0; }
.dropdown-divider { height: 1px; background: rgba(255,255,255,0.1); margin: 0.5rem 0; }
.dropdown-menu li a { display: flex; align-items: center; gap: 10px; padding: 0.5rem 1.5rem; color: white; font-weight: 400; transition: var(--transition); }
.dropdown-menu li a:hover { background: rgba(255,255,255,0.05); color: var(--primary); padding-left: 2rem; }
.dropdown-menu li a i { width: 16px; text-align: center; color: var(--secondary); }

.mobile-menu-btn { display: none; background: none; border: none; color: white; font-size: 1.5rem; cursor: pointer; }

/* Footer */
footer { background: var(--dark-light); color: white; padding: 3rem 0 1.5rem; }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 3rem; margin-bottom: 3rem; }
.footer-col h4 { font-size: 1.25rem; margin-bottom: 1.5rem; position: relative; padding-bottom: 0.75rem; }
.footer-col h4::after { content: ""; position: absolute; width: 40px; height: 2px; background: var(--tech-gradient); bottom: 0; left: 0; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: var(--gray-light); transition: var(--transition); display: inline-block; }
.footer-links a:hover { color: var(--primary); transform: translateX(5px); }
.footer-contact li { margin-bottom: 1rem; display: flex; align-items: flex-start; gap: 0.75rem; }
.footer-contact i { color: var(--primary); margin-top: 0.25rem; }
.footer-about p { color: var(--gray-light); margin-bottom: 1.5rem; }
.social-links { display: flex; gap: 1rem; }
.social-links a { width: 40px; height: 40px; background: rgba(255, 255, 255, 0.05); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; transition: var(--transition); }
.social-links a:hover { background: var(--tech-gradient); transform: translateY(-3px); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 1.5rem; text-align: center; }
.copyright { color: var(--gray-light); font-size: 0.875rem; }

/* Back to top */
.back-to-top { position: fixed; bottom: 2rem; right: 2rem; width: 50px; height: 50px; background: var(--tech-gradient); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; box-shadow: var(--shadow-lg); z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition); }
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); }

/* Hero Glass Blobs */
.glass-blob { position: absolute; border-radius: 50%; filter: blur(60px); opacity: 0.5; z-index: 1; animation: floatBlob 15s infinite ease-in-out; pointer-events: none; }
.blob-1 { width: 400px; height: 400px; background: rgba(245, 158, 11, 0.3); top: -100px; left: -100px; animation-delay: 0s; }
.blob-2 { width: 300px; height: 300px; background: rgba(16, 185, 129, 0.3); bottom: -50px; right: 10%; animation-delay: -5s; }
.blob-3 { width: 500px; height: 500px; background: rgba(59, 130, 246, 0.2); top: 50%; left: 50%; transform: translate(-50%, -50%); animation-delay: -10s; }

@keyframes floatBlob {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.1); }
}

/* Scroll Indicator */
.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 3; text-align: center; }
.mouse { width: 30px; height: 50px; border: 2px solid white; border-radius: 20px; display: flex; justify-content: center; position: relative; margin: 0 auto 10px; }
.wheel { width: 4px; height: 8px; background: white; border-radius: 2px; position: absolute; top: 8px; animation: scrollWheel 2s infinite; }
.m_scroll_arrows { display: block; width: 10px; height: 10px; transform: rotate(45deg); border-right: 2px solid white; border-bottom: 2px solid white; margin: 0 auto 3px; animation: scrollArrow 2s infinite; }
.unu { margin-top: 1px; animation-delay: 0.1s; }
.doi { animation-delay: 0.2s; }

@keyframes scrollWheel { 
  0% { top: 8px; opacity: 1; }
  100% { top: 25px; opacity: 0; }
}
@keyframes scrollArrow {
  0% { opacity: 0; transform: rotate(45deg) translate(-5px, -5px); }
  50% { opacity: 1; }
  100% { opacity: 0; transform: rotate(45deg) translate(5px, 5px); }
}

/* Floating WhatsApp Button */
.floating-whatsapp {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 2rem;
  left: 2rem;
  background-color: #25d366;
  color: #fff;
  border-radius: 50px;
  text-align: center;
  font-size: 30px;
  box-shadow: 2px 2px 3px #999;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: pulse-whatsapp 2s infinite;
  transition: var(--transition);
}
.floating-whatsapp:hover {
  background-color: #128c7e;
  transform: scale(1.1);
}

@keyframes pulse-whatsapp {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* Globals */
@keyframes grid-pulse {
  0% { background-size: 100% 100%, auto; }
  50% { background-size: 150% 150%, auto; }
  100% { background-size: 100% 100%, auto; }
}
@media (max-width: 768px) {
  .nav-links { position: fixed; top: 80px; left: -100%; width: 100%; height: calc(100vh - 80px); background: var(--dark); flex-direction: column; align-items: center; justify-content: center; gap: 2rem; transition: var(--transition); }
  .nav-links.active { left: 0; }
  .mobile-menu-btn { display: block; }
}