/* ================================
   1. VARIABLES & RESET
   ================================ */
:root {
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Orbitron', sans-serif;
  --color-bg: #020617;
  --color-surface: #0b1221;
  --color-primary: #10b981;
  --color-accent: #06b6d4;
  --color-accent-glow: #22d3ee;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --glass-bg: rgba(15, 23, 42, 0.55);
  --glass-border: rgba(148, 163, 184, 0.15);
  --max-width: 1200px;
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-accent-glow);
}

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

/* ================================
   2. TYPOGRAPHY & UTILITIES
   ================================ */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.5px;
}

h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.8rem, 3vw + 0.5rem, 3rem);
  line-height: 1.2;
}

h3 {
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
}

.text-cyan {
  color: var(--color-accent);
}

.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
  border: 1px solid rgba(6, 182, 212, 0.4);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.section-header h2 {
  margin-bottom: 1rem;
  background: linear-gradient(90deg, #e2e8f0, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.glass:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(6, 182, 212, 0.1);
}

/* ================================
   3. BUTTONS
   ================================ */
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 1rem 2rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.25);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.cta-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.cta-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 40px rgba(6, 182, 212, 0.45);
}

.cta-btn:hover::before {
  transform: translateX(100%);
}

/* ================================
   4. NAVIGATION
   ================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(2, 6, 23, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(6, 182, 212, 0.15);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.logo-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 8px;
  color: #fff;
  font-size: 1.1rem;
}

.logo-accent {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-text-muted);
  position: relative;
  padding-block: 0.25rem;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-text);
  position: relative;
  transition: background 0.2s;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.3s;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  top: 8px;
}

/* ================================
   5. HERO SECTION
   ================================ */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 40%, rgba(6, 182, 212, 0.12), transparent 50%),
              radial-gradient(circle at 80% 60%, rgba(16, 185, 129, 0.12), transparent 50%),
              linear-gradient(180deg, #020617 0%, #0b1221 100%);
  z-index: 0;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(6, 182, 212, 0.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(6, 182, 212, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--color-accent);
  opacity: 0.6;
  animation: flow 8s linear infinite;
}

.particle-1 {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.particle-2 {
  top: 60%;
  left: 85%;
  animation-delay: 2s;
}

.particle-3 {
  top: 40%;
  left: 50%;
  animation-delay: 4s;
}

.particle-4 {
  top: 80%;
  left: 30%;
  animation-delay: 1s;
}

.particle-5 {
  top: 10%;
  left: 70%;
  animation-delay: 3s;
}

.solar-disc {
  position: absolute;
  top: 10%;
  right: 15%;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fbbf24, #f59e0b);
  box-shadow: 0 0 60px rgba(251, 191, 36, 0.4), inset 0 0 20px rgba(255, 255, 255, 0.3);
  animation: float 6s ease-in-out infinite;
}

.solar-disc::before {
  content: '';
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  border: 2px dashed rgba(251, 191, 36, 0.3);
  animation: rotate-slow 20s linear infinite;
}

.wind-turbine {
  position: absolute;
  bottom: 15%;
  left: 10%;
  width: 6px;
  height: 120px;
  background: rgba(148, 163, 184, 0.4);
  border-radius: 4px;
}

.hub {
  position: absolute;
  top: -12px;
  left: 50%;
  width: 24px;
  height: 24px;
  background: rgba(148, 163, 184, 0.6);
  border-radius: 50%;
  transform: translateX(-50%);
  animation: spin-hub 4s linear infinite;
}

.blade {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, rgba(148, 163, 184, 0.7), rgba(148, 163, 184, 0.1));
  border-radius: 2px;
  transform-origin: 0 50%;
}

.blade-1 {
  transform: translate(-50%, -50%) rotate(0deg);
}

.blade-2 {
  transform: translate(-50%, -50%) rotate(120deg);
}

.blade-3 {
  transform: translate(-50%, -50%) rotate(240deg);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

@keyframes rotate-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spin-hub {
  from { transform: translateX(-50%) rotate(0deg); }
  to { transform: translateX(-50%) rotate(360deg); }
}

@keyframes flow {
  0% { transform: translateY(0) scale(1); opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { transform: translateY(-120px) scale(0.5); opacity: 0; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding-inline: 1.5rem;
}

.hero-kicker {
  font-family: var(--font-display);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.hero-sub {
  color: var(--color-text-muted);
  font-size: 1.25rem;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: 2.5rem;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 2px solid var(--glass-border);
  border-radius: 12px;
  display: grid;
  place-items: center;
}

.scroll-indicator span {
  width: 4px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0; transform: translateY(-6px); }
  50% { opacity: 1; transform: translateY(4px); }
}

/* ================================
   6. ABOUT / SYSTEMS SECTION
   ================================ */
.about {
  background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.stat-card {
  padding: 2rem 1.5rem;
  text-align: center;
}

.stat-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem;
}

.feature-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ================================
   7. PROGRAMS SECTION
   ================================ */
.programs {
  background: linear-gradient(180deg, #020617 0%, #0b1221 100%);
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.program-card {
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.program-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-primary);
  border: 1px solid rgba(16, 185, 129, 0.4);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
}

.program-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.program-card h3 {
  margin-bottom: 0.75rem;
}

.program-card p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.program-link {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
}

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

.program-link:hover {
  color: var(--color-text);
}

.program-link:hover::after {
  width: 100%;
}

/* ================================
   8. ENERGY LAB SECTION
   ================================ */
.lab {
  background: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.06), transparent 60%);
}

.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.lab-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.lab-visual {
  position: relative;
  height: 180px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(16, 185, 129, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--glass-border);
}

.lab-icon {
  font-size: 3rem;
  filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.3));
}

.lab-platform {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-accent);
  background: rgba(6, 182, 212, 0.15);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.lab-card h3 {
  padding: 1.5rem 1.5rem 0.5rem;
}

.lab-card p {
  padding: 0 1.5rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ================================
   9. CONTACT SECTION
   ================================ */
.contact {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #0b1221 0%, #020617 100%);
}

.contact-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.dash-line {
  position: absolute;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, rgba(6, 182, 212, 0.3), transparent);
  top: 0;
}

.dl-1 {
  left: 10%;
  animation: flow-down 6s linear infinite;
}

.dl-2 {
  left: 30%;
  animation: flow-down 8s linear infinite 1s;
}

.dl-3 {
  left: 70%;
  animation: flow-down 7s linear infinite 2s;
}

.dl-4 {
  left: 90%;
  animation: flow-down 9s linear infinite 0.5s;
}

@keyframes flow-down {
  0% { transform: translateY(-100%); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}

.holo-ring {
  position: absolute;
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: 50%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  animation: ring-pulse 4s ease-in-out infinite;
}

.ring-1 {
  width: 400px;
  height: 400px;
}

.ring-2 {
  width: 600px;
  height: 600px;
  animation-delay: 1s;
  border-color: rgba(16, 185, 129, 0.2);
}

@keyframes ring-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.4; }
  50% { transform: translate(-50%, -50%) scale(1.05); opacity: 0.8; }
}

.contact-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 1rem;
}

.contact-lead {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-methods {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-methods li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.contact-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-accent);
}

.contact-methods a,
.contact-methods address {
  color: var(--color-text);
  font-style: normal;
  font-size: 1.05rem;
}

.contact-methods a:hover {
  color: var(--color-accent);
}

.contact-form {
  padding: 2.5rem;
}

.form-header {
  margin-bottom: 1.5rem;
}

.form-header h3 {
  margin-bottom: 0.5rem;
}

.form-header p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.9rem 1rem;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--color-text);
  font-family: inherit;
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #475569;
}

.submit-btn {
  width: 100%;
  padding: 1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(6, 182, 212, 0.35);
}

.form-success {
  display: none;
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: 8px;
  color: #6ee7b7;
  text-align: center;
}

.form-success.visible {
  display: block;
  animation: fade-in-up 0.5s ease both;
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================================
   10. FOOTER
   ================================ */
.site-footer {
  border-top: 1px solid var(--glass-border);
  background: #020617;
  padding-block: 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-brand p {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

.footer-copy {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ================================
   11. SCROLL ANIMATIONS
   ================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ================================
   12. RESPONSIVE
   ================================ */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .contact-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    inset: 0;
    top: 72px;
    background: rgba(2, 6, 23, 0.95);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .mobile-toggle {
    display: block;
  }

  .mobile-toggle.active .hamburger {
    background: transparent;
  }

  .mobile-toggle.active .hamburger::before {
    transform: translateY(8px) rotate(45deg);
  }

  .mobile-toggle.active .hamburger::after {
    transform: translateY(-8px) rotate(-45deg);
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .programs-grid {
    grid-template-columns: 1fr;
  }

  .lab-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }

  .solar-disc {
    width: 100px;
    height: 100px;
    right: 5%;
  }

  .wind-turbine {
    left: 5%;
    height: 80px;
  }

  .blade {
    width: 70px;
  }

  .ring-1 {
    width: 250px;
    height: 250px;
  }

  .ring-2 {
    width: 350px;
    height: 350px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}