:root {
  --primary: #0f0f0f;
  --secondary: #1a1a1a;
  --accent: #00ff88;
  --text: #ffffff;
  --text-secondary: #b0b0b0;
}

:root[data-theme="dark"] {
  --primary: #0f0f0f;
  --secondary: #1a1a1a;
  --accent: #00ff88;
  --text: #ffffff;
  --text-secondary: #b0b0b0;
  --text-svg:#fff
}

:root[data-theme="light"] {
  --primary: #f9f9f9;
  --secondary: #ffffff;
  --accent: #00b359;
  --text: #000000;
  --text-secondary: #6c757d;
  --text-svg:#000
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
  scroll-behavior: smooth;
}

body {
  background-color: var(--primary);
  color: var(--text);
}

/* Header Styles */
header {
  background-color: var(--secondary);
  padding: 1rem 2rem;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

section{
  height: 100vh;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.text-svg{
  fill: var(--text-svg);
  stroke: var(--text-svg);
}

.tank-svg{
  stroke: var(--text-svg);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
}

.logo h1 span {
  color: var(--accent);
}
.logo a{
  color: var(--text);
  text-decoration: none;
  transition: color 0.3s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo img {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 8px rgba(0, 255, 136, 0.3));
}


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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s;
  position: relative;
  padding-bottom: 5px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

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

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  background: var(--primary);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 0 2rem;
  margin-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-content h2 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(45deg, var(--accent), #80ffbb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background-color: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.cta-btn:hover {
  background-color: rgba(100, 255, 218, 0.1);
}

.hero-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  padding: 2rem;
}

.tank-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 0 20px rgba(0, 255, 136, 0.2));
}

.tank-container {
  border-radius: 9px;
  filter: drop-shadow(0 0 10px rgba(0, 255, 136, 0.3));
}

.liquid {
  filter: drop-shadow(0 0 8px rgba(0, 255, 136, 0.4));
}

/* Services Section */
.services {
  position: relative;
  background: var(--secondary);
  overflow: hidden;
  padding: 5rem 2rem;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(45deg,
      transparent,
      transparent 10px,
      rgba(0, 255, 136, 0.02) 10px,
      rgba(0, 255, 136, 0.02) 20px);
}

.services h2,
.solutions h2,
.about h2,
.contact h2 {
  text-align: center;
  font-size: 3.5rem;
  margin-bottom: 3rem;
  color: var(--accent);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.service-card {
  background: var(--secondary);
  border: 1px solid var(--accent);
  box-shadow: 0 8px 32px rgba(0, 255, 136, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s;
}

.service-card:hover {
  border-color: var(--accent);
  transform: translateY(-10px);
}

.service-card i {
  font-size: 3rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

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

.service-card p {
  color: var(--text-secondary);
}

/* About Section */
.about {
  padding: 5rem 2rem;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ----------------- */
.swiper-container {
  width: 400px;
  height: 250px;
  border-radius: 10px;
  overflow: hidden;
}

.swiper-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
}


.swiper-container .swiper-button-next,
.swiper-container .swiper-button-prev {

  width: 40px;
  height: 40px;
  background-color: rgba(22, 22, 22, 0.39);
  border-radius: 50%;
  color: white;

}

.swiper-container .swiper-button-prev::after,
.swiper-container .swiper-button-next::after {
  font-size: 20px;
}


.swiper-container .swiper-button-next:hover,
.swiper-container .swiper-button-prev:hover {
  background: rgba(0, 0, 0, 0.8);
}

.swiper-container .swiper-pagination-bullet {
  background: #fff;
}

/*------------------  */
.tech-illustration {
  background: var(--secondary);
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.1);
  width: 100%;
  height: 400px;
  position: relative;
  overflow: hidden;
}

.graph-container {
  width: 100%;
  height: 100%;
}

/* Solutions Section */
.solutions {
  position: relative;
  background: var(--secondary);
  overflow: hidden;
  padding: 5rem 2rem;
}

.solutions::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(45deg,
      transparent,
      transparent 10px,
      rgba(0, 255, 136, 0.02) 10px,
      rgba(0, 255, 136, 0.02) 20px);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.solution-card {
  background: var(--secondary);
  border: 1px solid var(--accent);
  box-shadow: 0 8px 32px rgba(0, 255, 136, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s;
}

.solution-card:hover {
  border-color: var(--accent);
  transform: translateY(-10px);
}

.solution-icon {
  background: rgba(0, 255, 136, 0.1);
  border: 2px solid var(--accent);
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.solution-icon i {
  font-size: 2rem;
  color: var(--accent);
}

/* Pricing Section */
.pricing {
  height: 150vh!important;
  padding: 5rem 2rem;
  background: var(--secondary);
  position: relative;
  overflow: hidden;
}

.pricing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(45deg,
      transparent,
      transparent 10px,
      rgba(0, 255, 136, 0.02) 10px,
      rgba(0, 255, 136, 0.02) 20px);
}

.pricing h2 {
  text-align: center;
  font-size: 3.5rem;
  margin-bottom: 3rem;
  color: var(--accent);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.price-card {
  background: var(--secondary);
  border: 1px solid var(--accent);
  border-radius: 15px;
  padding: 2rem;
  text-align: center;
  transition: transform 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.price-card:hover {
  transform: translateY(-10px);
  border-color: var(--accent);
}

.price-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--accent), #80ffbb);
  opacity: 0;
  transition: opacity 0.3s;
}

.price-card:hover::before {
  opacity: 1;
}

.price-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent);
}

.price-amount {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.price-period {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.features-list {
  list-style: none;
  margin: 2rem 0;
  padding: 0;
}

.features-list li {
  padding: 0.8rem 0;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.features-list li i {
  font-size: 1.2rem;
}

.features-list li i.ph-check-circle {
  color: var(--accent);
}

.features-list li i.ph-x-circle {
  color: #ff4444;
}

.features-list li:last-child {
  border-bottom: none;
}

.price-btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
  border-radius: 5px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  margin-top: 1rem;
}

.price-btn:hover {
  background: var(--accent);
  color: var(--primary);
}

/* Contact Section */
.contact {
  padding: 5rem 2rem;
}

.contact-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  background: var(--secondary);
  border: 1px solid rgba(0, 255, 136, 0.2);
  padding: 1rem;
  border-radius: 5px;
  color: var(--text);
  transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  outline: none;
}

.contact-form select {
  background: var(--secondary);
  border: 1px solid rgba(0, 255, 136, 0.2);
  padding: 1rem;
  border-radius: 5px;
  color: var(--text);
  transition: border-color 0.3s;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2300ff88' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.5em;
}

.contact-form select:focus {
  border-color: var(--accent);
  outline: none;
}

.contact-form select option {
  background: var(--secondary);
  color: var(--text);
  padding: 1rem;
}

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

.submit-btn {
  background: linear-gradient(45deg, var(--accent), #80ffbb);
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 1rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: opacity 0.3s;
}

.submit-btn:hover {
  opacity: 0.9;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.info-item i {
  font-size: 1.5rem;
  color: var(--accent);
}
.info-item a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.3s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-switcher {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  background: var(--secondary);
  border: 2px solid var(--accent);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.theme-switcher:hover {
  transform: scale(1.1);
}

.theme-switcher i {
  font-size: 1.5rem;
  color: var(--accent);
}

/* Footer */
footer {
  background-color: var(--secondary);
  padding: 4rem 2rem 2rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-about {
  padding-right: 2rem;
}

.footer-about .logo {
  margin-bottom: 1rem;
}

.footer-about p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.footer-section h3 {
  color: var(--text);
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-section h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.8rem;
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-section ul li a:hover {
  color: var(--accent);
}

.footer-section ul li a i {
  font-size: 1.1rem;
  color: var(--accent);
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: all 0.3s;
}

.social-links a:hover {
  background: var(--accent);
  color: var(--primary);
}

.footer-bottom {
  padding-top: 2rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-illustration {
    order: -1;
  }

  .tank-svg {
    max-width: 300px;
  }

  .hero-content h2 {
    font-size: 2rem;
  }

  .about-content,
  .contact-container {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-about {
    padding-right: 0;
  }
}