/* Reset and Variables */
:root {
  --bg-dark: #0f172a;
  --bg-darker: #020617;
  --bg-card: #1e293b;

  --primary: #f97316;
  /* Vibrant Orange for Insulation/Heat */
  --primary-hover: #ea580c;
  --secondary: #0ea5e9;
  /* Vibrant Blue for Airflow/Ventilation */
  --secondary-hover: #0284c7;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: "Inter", sans-serif;
  color: var(--text-main);
  background-color: var(--bg-dark);
}

body {
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
.logo-text,
.badge {
  font-family: "Outfit", sans-serif;
}

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

ul {
  list-style: none;
}

/* Typography & Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
}

.section-padding {
  padding: 6rem 0;
}

.text-gradient {
  /* Gradient combining heat and airflow colors */
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249, 115, 22, 0.5);
}

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

.btn-secondary:hover {
  background: var(--secondary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1.2rem 0;
  transition: var(--transition);
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.logo-text {
  font-size: 1.8rem;
  font-weight: 800;
}

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

.nav-links a:not(.btn) {
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:not(.btn):hover {
  color: var(--primary);
}

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

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }

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

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }

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

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 0 rgba(249, 115, 22, 0.7);
  }

  70% {
    box-shadow: 0 0 0 15px rgba(249, 115, 22, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(249, 115, 22, 0);
  }
}

.glow-btn {
  animation: pulseGlow 2s infinite;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: url("https://images.unsplash.com/photo-1622322384779-11ba188a1e36?auto=format&fit=crop&q=80")
    center/cover no-repeat fixed;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(2, 6, 23, 0.95),
    rgba(2, 6, 23, 0.7)
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-content .badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--secondary);
  border: 1px solid var(--secondary);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-content h1 {
  font-size: clamp(3rem, 5vw, 4.5rem);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: "Outfit", sans-serif;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Services */
.services {
  background-color: var(--bg-darker);
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-card);
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-10px);
  border-color: rgba(249, 115, 22, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.card-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

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

.card-content {
  padding: 2.5rem;
  position: relative;
}

.icon-wrap {
  position: absolute;
  top: -30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background: var(--bg-darker);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  border: 2px solid var(--primary);
}

.card-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card-content p {
  color: var(--text-muted);
  line-height: 1.6;
}

/* About Section */
.about {
  background-color: var(--bg-dark);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h2 {
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.features {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--text-main);
}

.about-image-wrapper {
  position: relative;
  border-radius: 20px;
}

.about-image {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.mask-image {
  -webkit-mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 80%, transparent 100%);
}

.floating-box {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: 15px;
  border-left: 4px solid var(--primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-15px);
  }
}

.floating-box h4 {
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

/* Projects Section */
.projects {
  background-color: var(--bg-darker);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 3rem;
}

.project-card {
  background: var(--bg-card);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.project-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.project-info {
  padding: 2rem;
}

.project-info h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.project-info p {
  color: var(--text-muted);
  line-height: 1.6;
}

/* Contact/CTA */
.contact {
  position: relative;
  background: url("https://images.unsplash.com/photo-1605810230434-7631ac76ec81?auto=format&fit=crop&q=80")
    center/cover fixed;
}

.contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.85);
}

.contact-container {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.contact-card {
  background: var(--bg-card);
  padding: 4rem;
  border-radius: 20px;
  max-width: 600px;
  width: 100%;
  text-align: center;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-card h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.contact-card p {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.contact-info {
  display: flex;
  justify-content: space-around;
  margin-bottom: 3rem;
  gap: 1rem;
}

.info-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.info-item .icon {
  font-size: 2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.input-group input,
.input-group textarea {
  width: 100%;
  padding: 1rem;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  font-family: inherit;
  transition: var(--transition);
}

.input-group input:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(15, 23, 42, 0.9);
}

/* Footer */
.footer {
  background: #000;
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--text-muted);
}

.footer-links h4 {
  margin-bottom: 1rem;
}

.footer-links a {
  display: block;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  transition: var(--transition);
}

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

.footer-legal {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Visibility classes for JS animation Observer */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 1s ease,
    transform 1s ease;
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition:
    opacity 1s ease,
    transform 1s ease;
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition:
    opacity 1s ease,
    transform 1s ease;
}

.fade-in {
  opacity: 0;
  transition: opacity 1.5s ease;
}

.slide-up {
  opacity: 0;
  transform: translateY(50px);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
}

.visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
  transform: translateX(0) !important;
}

/* Responsive */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero-content h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

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