/* 
 * RUNGEN RAMMOHAN ENERGY PARK - Global Stylesheet
 * Responsive, Premium Dark/Light Glassmorphism Theme
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* Color Variables and Theme Configuration */
:root {
  /* Default: Dark Theme (Premium Midnight Slate) */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #0b0f19;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #10b981; /* Emerald Clean Energy */
  --accent-hover: #34d399;
  --accent-secondary: #0d9488; /* Advanced Teal */
  --accent-glow: rgba(16, 185, 129, 0.2);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.06);
  --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  --transition-speed: 0.3s;
}

[data-theme="light"] {
  /* Light Theme */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent: #059669;
  --accent-hover: #047857;
  --accent-secondary: #0f766e;
  --accent-glow: rgba(5, 150, 105, 0.1);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(15, 23, 42, 0.08);
  --shadow: 0 8px 32px 0 rgba(148, 163, 184, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

button, .btn {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--transition-speed) ease;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

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

.flex { display: flex; }
.flex-col { flex-direction: column; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.text-center { text-align: center; }
.text-left { text-align: left; }

.grid {
  display: grid;
  gap: 32px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 992px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 60px 0; }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .flex-mobile-col { flex-direction: column; }
}

/* Headers & Typography */
.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
  border-radius: 2px;
}

.section-title.left-align::after {
  left: 0;
  transform: none;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 48px auto;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navigation Menu */
header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  transition: all var(--transition-speed) ease;
}

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

.logo {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo span {
  white-space: nowrap;
}

@media (max-width: 576px) {
  .logo span {
    white-space: normal;
    font-size: 1.05rem;
    line-height: 1.2;
  }
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: bold;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.9rem;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--text-secondary);
}

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

.controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--glass-border);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  font-size: 1.2rem;
}

.theme-toggle-btn:hover {
  background-color: var(--accent-glow);
  border-color: var(--accent);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  color: var(--text-primary);
  padding: 8px;
}

@media (max-width: 1150px) {
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--glass-border);
    flex-direction: column;
    padding: 24px 0;
    gap: 16px;
    box-shadow: var(--shadow);
  }
  .nav-links.active {
    display: flex;
  }
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  color: #ffffff;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
  filter: brightness(1.1);
}

.btn-secondary {
  background-color: var(--glass-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background-color: var(--accent-glow);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* Hero Section style */
.hero-sec {
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 48px;
}

.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.hero-visual {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--glass-border);
}

.hero-visual img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 10s ease;
}

.hero-visual:hover img {
  transform: scale(1.05);
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content h1 {
    font-size: 2.8rem;
  }
  .hero-content p {
    margin: 0 auto 36px auto;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-visual img {
    height: 350px;
  }
}

/* Cards & Glassmorphism Panels */
.glass-card {
  background-color: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform var(--transition-speed) ease, border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.glass-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.card-icon {
  width: 50px;
  height: 50px;
  background: var(--accent-glow);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.card-image-wrapper {
  width: 100%;
  height: 160px;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--glass-border);
  background-color: var(--bg-tertiary);
}

.card-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-speed) ease;
}

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

.card-title {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.card-link:hover {
  color: var(--accent-hover);
}

/* Timeline & Journey */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 4px;
  background-color: var(--glass-border);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -2px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  right: -10px;
  background-color: var(--bg-primary);
  border: 4px solid var(--accent);
  top: 15px;
  border-radius: 50%;
  z-index: 1;
}

.left-timeline { left: 0; }
.right-timeline { left: 50%; }

.right-timeline::after { left: -10px; }

.timeline-content {
  padding: 20px 30px;
  background-color: var(--glass-bg);
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

@media screen and (max-width: 600px) {
  .timeline::after { left: 31px; }
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  .timeline-item::after {
    left: 21px;
    right: auto;
  }
  .left-timeline, .right-timeline {
    left: 0;
  }
}

/* Leadership Section Styles */
.leader-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.leader-image-wrapper {
  position: relative;
  width: 100%;
  height: 280px;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 24px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
}

.leader-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.leader-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 3.5rem;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.leader-placeholder-initials {
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 2px;
}

.leader-placeholder-title {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 8px;
  font-family: 'Inter', sans-serif;
}

.leader-info h3 {
  font-size: 1.4rem;
  margin-bottom: 4px;
}

.leader-title {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.leader-bio {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.leader-meta {
  font-size: 0.85rem;
  border-top: 1px solid var(--glass-border);
  padding-top: 16px;
  margin-top: auto;
}

.leader-meta p {
  margin-bottom: 6px;
}

/* Forms & Interactive elements */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
}

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

.info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.info-icon {
  width: 48px;
  height: 48px;
  background-color: var(--accent-glow);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.3rem;
  flex-shrink: 0;
}

.info-content h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.info-content p {
  color: var(--text-secondary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 600;
  font-size: 0.9rem;
}

.form-control {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 14px 18px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition-speed) ease;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  outline: none;
  background-color: var(--bg-secondary);
}

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

.form-alert {
  padding: 16px;
  border-radius: 8px;
  display: none;
  font-weight: 500;
}

.form-alert.success {
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  display: block;
}

/* Footer style */
footer {
  background-color: var(--bg-tertiary);
  border-top: 1px solid var(--glass-border);
  padding: 80px 0 32px 0;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

.footer-brand h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--accent);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* Animations & Scroll reveal effects */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-up {
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Custom styles for specific sub-components */
.product-badge {
  background-color: var(--accent-glow);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 12px;
}

.stat-number {
  font-family: 'Outfit', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.patent-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(13, 148, 136, 0.05) 100%);
  border-left: 4px solid var(--accent);
}

.achievement-pill {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.achievement-icon {
  color: var(--accent);
  font-size: 1.2rem;
}