/* ===== ROOT DESIGN SYSTEM ===== */
:root {
  --primary: #0f2a44;        /* industrial navy */
  --secondary: #f4f6f8;      /* light grey */
  --accent: #ff8c00;         /* machinery orange */
  --text-dark: #1f2933;
  --text-light: #ffffff;
  --border: #d1d5db;
}

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

body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  background-color: var(--secondary);
  color: var(--text-dark);
  line-height: 1.6;
}

/* ===== HEADER ===== */
header {
  background: var(--primary);
  color: var(--text-light);
  padding: 16px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  font-size: 22px;
  font-weight: 600;
}

nav a {
  color: var(--text-light);
  text-decoration: none;
  margin-left: 24px;
  font-weight: 500;
}

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

/* ===== HERO ===== */
.hero {
  background: linear-gradient(
      rgba(15, 42, 68, 0.75),
      rgba(15, 42, 68, 0.75)
    ),
    url('abc.jpg') center / cover no-repeat;
  color: white;
  padding: 120px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 12px;
}

.hero p {
  max-width: 700px;
  margin: 0 auto 30px;
  font-size: 18px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  margin: 8px;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover {
  opacity: 0.9;
}

/* ===== SECTIONS ===== */
.section {
  max-width: 1200px;
  margin: 60px auto;
  padding: 0 20px;
}

.section h2 {
  font-size: 32px;
  margin-bottom: 20px;
  text-align: center;
}

/* ===== CARDS ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: white;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* ===== FOOTER ===== */
footer {
  background: #0b1e30;
  color: white;
  padding: 40px 20px;
  text-align: center;
  margin-top: 80px;
}