/* 
 * ENERGY GATE LLC - Main Stylesheet
 * A professional, modern design for an energy trading company
 */

/* ===== Base Styles ===== */
:root {
  /* Color Variables */
  --primary-color: #0066cc;
  --primary-dark: #004c99;
  --primary-light: #4d94ff;
  --secondary-color: #ff9933;
  --secondary-dark: #e67300;
  --secondary-light: #ffb366;
  --dark-blue: #002147;
  --light-blue: #e6f0ff;
  --dark-gray: #333333;
  --medium-gray: #666666;
  --light-gray: #f5f5f5;
  --white: #ffffff;
  --black: #000000;
  
  /* Gradient Variables */
  --primary-gradient: linear-gradient(135deg, var(--primary-color), #0099ff);
  --secondary-gradient: linear-gradient(135deg, var(--secondary-color), #ffcc00);
  --blue-gradient: linear-gradient(135deg, var(--dark-blue), var(--primary-color));
  
  /* Typography Variables */
  --body-font: 'Poppins', sans-serif;
  --heading-font: 'Poppins', sans-serif;
  
  /* Spacing Variables */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 5rem;
  
  /* Border Radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 24px;
  
  /* Transition */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Shadow */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.15);
  
  /* Container Width */
  --container-width: 1200px;
  --container-padding: 1.5rem;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--dark-blue);
}

h1 {
  font-size: 3.5rem;
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 1.75rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

ul {
  list-style: none;
}

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

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ===== Header Styles ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  background-color: var(--white);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

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

.logo:hover {
  transform: scale(1.05);
}

.logo img {
  height: 40px;
}

.main-nav .nav-list {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--dark-gray);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--dark-gray);
  transition: all var(--transition-normal);
  margin: 6px 0;
}

/* Language Switcher */
.language-switcher {
  position: relative;
  margin-left: var(--spacing-lg);
}

.current-language {
  display: flex;
  align-items: center;
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.current-language:hover {
  background-color: var(--light-gray);
}

.current-language svg {
  margin-left: var(--spacing-xs);
}

.flag-icon {
  width: 20px;
  height: 15px;
  margin-right: var(--spacing-xs);
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--white);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-sm);
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 1001;
}

.language-switcher:hover .language-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--dark-gray);
  transition: background-color var(--transition-fast);
}

.lang-item:hover {
  background-color: var(--light-gray);
}

.lang-item.active {
  font-weight: 600;
  color: var(--primary-color);
}

/* ===== Hero Section ===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: var(--spacing-xxl) 0;
  background-color: var(--light-blue);
  overflow: hidden;
}

.hero-section .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero-content {
  z-index: 2;
}

.hero-text {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  color: var(--medium-gray);
}

.gradient-text {
  background-image: var(--primary-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

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

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

.shape-1,
.shape-2 {
  position: absolute;
  background-color: var(--primary-light);
  border-radius: 50%;
  opacity: 0.1;
  z-index: -1;
}

.shape-1 {
  width: 400px;
  height: 400px;
  bottom: -200px;
  right: -200px;
}

.shape-2 {
  width: 300px;
  height: 300px;
  top: -150px;
  left: -150px;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--primary-color);
  font-size: 0.9rem;
  animation: bounce 2s infinite;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.scroll-indicator:hover {
  color: var(--secondary-color);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0) translateX(-50%);
  }
  40% {
    transform: translateY(-20px) translateX(-50%);
  }
  60% {
    transform: translateY(-10px) translateX(-50%);
  }
}

/* Hero Buttons */
.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--dark-blue);
  border: 2px solid var(--primary-color);
  box-shadow: none;
  transition: all var(--transition-normal);
}

.btn-outline:hover {
  background-color: rgba(0, 102, 204, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

/* ===== Section Styles ===== */
.section {
  padding: var(--spacing-xxl) 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.section-subheading {
  font-size: 1.2rem;
  color: var(--medium-gray);
}

/* ===== About Section ===== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.about-image {
  position: relative;
}

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

.floating-element {
  position: absolute;
  bottom: -30px;
  right: -30px;
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-md);
  animation: float 3s ease-in-out infinite;
}

.stats-card {
  text-align: center;
}

.stats-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: block;
}

.stats-label {
  font-size: 0.9rem;
  color: var(--medium-gray);
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-15px);
  }
  100% {
    transform: translateY(0px);
  }
}

/* Company Info Section */
.company-info-section {
    background-color: var(--light-blue);
}

.company-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.info-card {
    background-color: var(--white);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.info-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.info-card p {
    margin-bottom: 0;
    color: var(--dark-gray);
}

@media (max-width: 768px) {
    .company-info-grid {
        grid-template-columns: 1fr;
    }
}
/* Legislation Grid Layout */
.legislation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.legislation-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

@media (max-width: 992px) {
    .legislation-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Services Section ===== */
.services-section {
  background-color: var(--light-gray);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background: var(--light-blue);
  border-radius: 50%;
  margin-bottom: var(--spacing-md);
}

.service-icon img {
  width: 30px;
  height: 30px;
}

.service-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.3rem;
}

/* ===== Market Operations Section ===== */
.market-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.market-image {
  position: relative;
}

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

.shape-accent {
  position: absolute;
  top: -20px;
  left: -20px;
  width: 100px;
  height: 100px;
  background: var(--primary-gradient);
  border-radius: var(--border-radius-sm);
  z-index: -1;
  opacity: 0.2;
  transform: rotate(45deg);
}

.market-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.market-card:hover {
  transform: translateX(10px);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--light-blue);
  border-radius: 50%;
  margin-right: var(--spacing-md);
}

.card-icon svg {
  color: var(--primary-color);
}

/* ===== Innovation Section ===== */
.innovation-section {
  background-color: var(--dark-blue);
  color: var(--white);
}

.innovation-section h2 {
  color: var(--white);
}

.innovation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.innovation-image {
  position: relative;
}

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

.floating-stats {
  position: absolute;
  top: 30px;
  right: -30px;
  background-color: var(--primary-color);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-sm) var(--spacing-md);
  animation: float 3s ease-in-out infinite;
}

.stats-pill {
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 500;
}

/* ===== Legislation Section ===== */
.legislation-section {
  background-color: var(--light-gray);
}

.legislation-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

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

.legislation-list {
  margin-bottom: var(--spacing-lg);
}

.legislation-list li {
  margin-bottom: var(--spacing-md);
}

.legislation-button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--primary-color);
  border-radius: var(--border-radius-sm);
  color: var(--primary-color);
  transition: all var(--transition-normal);
  text-align: center;
  width: 100%;
}

.legislation-button:hover {
  background-color: var(--primary-color);
  color: var(--white);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== Stats Section ===== */
.stats-section {
  background-image: var(--blue-gradient);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.stat-item {
  padding: var(--spacing-lg);
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  background-image: var(--secondary-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.stat-label {
  font-size: 1.1rem;
}

/* ===== Contact Section ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.contact-info {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.contact-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: var(--light-blue);
  border-radius: 50%;
  margin-right: var(--spacing-md);
  flex-shrink: 0;
}

.contact-icon svg {
  color: var(--primary-color);
}

.contact-details {
  flex: 1;
}

.contact-details h3 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.1rem;
}

.contact-details p {
  margin-bottom: 0;
  color: var(--medium-gray);
}

.contact-form-wrapper {
  background-color: var(--white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--light-gray);
  border-radius: var(--border-radius-sm);
  font-family: var(--body-font);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

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

/* Form Validation Styles */
.form-group input:invalid,
.form-group textarea:invalid {
  border-color: #ff3860;
}

.form-group .error-message {
  color: #ff3860;
  font-size: 0.85rem;
  margin-top: 5px;
  display: none;
}

.form-group.error .error-message {
  display: block;
}

/* Success Message */
.form-success-message {
  display: none;
  background-color: #23d160;
  color: white;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.form-success-message.visible {
  display: block;
}

/* ===== Footer Styles ===== */
.site-footer {
  background-color: var(--dark-blue);
  color: var(--white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-logo img {
  height: 40px;
  margin-bottom: var(--spacing-md);
  transition: transform var(--transition-normal);
}

.footer-logo img:hover {
  transform: scale(1.05);
}

.footer-logo p {
  color: rgba(255, 255, 255, 0.7);
}

.footer-links h3,
.footer-contact h3 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

.footer-links ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

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

.footer-contact p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-sm);
}

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

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0;
}

/* Language-specific address styles */
.en-address, .ua-address {
  margin-bottom: var(--spacing-sm);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
  font-family: var(--body-font);
  font-size: 1rem;
}

.btn-primary {
  background-image: var(--primary-gradient);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(0, 102, 204, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.6);
  transform: translateY(-2px);
  color: var(--white);
}

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

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  border-radius: 50%;
  color: var(--white);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
}

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

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-5px);
}

/* ===== Animation Classes ===== */
.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.2s;
}

.delay-2 {
  transition-delay: 0.4s;
}

.delay-3 {
  transition-delay: 0.6s;
}

.delay-4 {
  transition-delay: 0.8s;
}

/* ===== Responsive Styles ===== */
@media (max-width: 1024px) {
  html {
    font-size: 15px;
  }
  
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2.2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    row-gap: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .hero-section .container,
  .about-content,
  .market-grid,
  .innovation-grid,
  .legislation-content,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .hero-section {
    padding-top: 120px;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .contact-info {
    order: 2;
  }
  
  .main-nav {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--white);
    overflow: hidden;
    transition: height var(--transition-normal);
    box-shadow: var(--shadow-md);
  }
  
  .main-nav.active {
    height: auto;
  }
  
  .main-nav .nav-list {
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }
  
  .nav-toggle {
    display: block;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -8px);
  }
  
  .legislation-button {
    padding: var(--spacing-sm) var(--spacing-xs);
    font-size: 0.9rem;
  }
}

@media (max-width: 576px) {
  h1 {
    font-size: 2.2rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-text {
    font-size: 1.1rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .contact-info {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}