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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: #0f172a;
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  height: 90px;
  width: auto;
  max-width: 320px;
}

/* Navigation */
nav a {
  color: white;
  text-decoration: none;
  margin-left: 2rem;
  font-weight: 500;
  transition: color 0.3s;
}

nav a:hover {
  color: #f59e0b;
}

/* Hero - Nuts & Bolts */
.hero {
  background: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.75)),
              url('https://picsum.photos/id/1015/2000/1200') center/cover no-repeat;
  color: white;
  text-align: center;
  padding: 220px 20px 160px;
  background-position: center;
  background-size: cover;
}

.hero h1 {
  font-size: 3.8rem;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: #fbbf24;
}

.subtext {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.btn {
  display: inline-block;
  background: #f59e0b;
  color: #0f172a;
  padding: 16px 36px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1rem;
  transition: all 0.3s;
}

.btn:hover {
  background: #d97706;
  transform: translateY(-3px);
}

/* Sections */
.section {
  padding: 90px 0;
}

.bg-light {
  background: #f8fafc;
}

h2 {
  text-align: center;
  font-size: 2.6rem;
  margin-bottom: 3rem;
  color: #0f172a;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background: white;
  padding: 2.5rem 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  text-align: center;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-8px);
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info p {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

form input, form textarea {
  width: 100%;
  padding: 14px;
  margin-bottom: 1.2rem;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 1rem;
}

form button {
  width: 100%;
}

/* Footer */
footer {
  background: #0f172a;
  color: white;
  text-align: center;
  padding: 2.5rem 0;
  font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 160px 20px 120px; }
  .hero h1 { font-size: 2.8rem; }
  .tagline { font-size: 1.4rem; }
  nav { display: none; } /* Add hamburger later if needed */
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
}