/* EnerShift - Professional Green Theme - April 2026 */
:root {
  --primary: #10b981;      /* Fresh emerald green */
  --accent: #34d399;       /* Teal-green highlights */
  --dark: #0f172a;         /* Deep slate navy */
  --gray: #64748b;
  --light: #f8fafc;
  --white: #ffffff;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--light);
  color: var(--dark);
  line-height: 1.6;
}

nav {
  background: var(--dark);
  color: white;
  padding: 1rem 5%;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover {
  color: var(--primary);
}

.hero {
  background: linear-gradient(135deg, var(--dark) 0%, #1e3a2f 100%); /* Dark green gradient */
  color: white;
  text-align: center;
  padding: 10rem 5% 7rem;
}

.hero h1 {
  font-size: 3.8rem;
  margin-bottom: 1.2rem;
  font-weight: 800;
}

.hero p {
  font-size: 1.5rem;
  max-width: 900px;
  margin: 0 auto 2.5rem;
  color: #cbd5e1;
}

.cta-btn {
  background: var(--primary);
  color: white;
  padding: 1.1rem 2.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.3s, transform 0.2s;
}
.cta-btn:hover {
  background: #059669;
  transform: translateY(-2px);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 5rem 5%;
}

section {
  margin: 6rem 0;
}

h2 {
  font-size: 3rem;
  margin-bottom: 1.8rem;
  text-align: center;
  font-weight: 700;
}

h3 {
  font-size: 2rem;
  margin-bottom: 1.2rem;
  color: var(--primary);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
  margin-top: 3rem;
}

.card {
  background: white;
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}
.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

ul {
  list-style: none;
  padding-left: 0;
}
ul li {
  margin: 1rem 0;
  font-size: 1.1rem;
}

footer {
  background: var(--dark);
  color: white;
  text-align: center;
  padding: 4rem 5% 2rem;
  margin-top: 6rem;
}

footer a {
  color: var(--primary);
  text-decoration: none;
  margin: 0 1rem;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.8rem; }
  .hero p { font-size: 1.3rem; }
  .nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
  }
  .nav-links a { margin: 0; }
}