/* =====================================================
GLOBAL RESET
===================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #0b1220;
  color: #e8eefc;
  padding-bottom: 50px; /* prevents footer overlap */
}

/* =====================================================
HEADER
===================================================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: #0a1223;
  border-bottom: 1px solid #1f2a3a;
  padding: 14px 20px;
  z-index: 1000;
}

.header-container {
  max-width: 1100px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav a {
  color: #e8eefc;
  text-decoration: none;
  margin: 0 10px;
  padding: 6px 10px;
  border-radius: 8px;
  transition: 0.2s;
}

nav a:hover {
  background: #15233a;
}

/* =====================================================
HERO
===================================================== */
.hero {
  margin-top: 90px;
  padding: 80px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 38px;
  margin-bottom: 10px;
}

.hero p {
  color: #b7c3e0;
  font-size: 17px;
  margin-bottom: 20px;
}

/* =====================================================
BUTTONS
===================================================== */
.btn {
  display: inline-block;
  padding: 10px 18px;
  margin: 5px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: bold;
}

.btn-primary {
  background: #4a90e2;
  color: #ffffff;
}

.btn-secondary {
  border: 1px solid #2a3a52;
  color: #ffffff;
}

/* =====================================================
LAYOUT
===================================================== */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 40px 60px;
}

.section-title {
  font-size: 22px;
  margin-bottom: 20px;
}

/* =====================================================
GRID
===================================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 15px;
  margin-bottom: 40px;
}

/* =====================================================
CARDS
===================================================== */
.card {
  background: #111827;
  border: 1px solid #223044;
  padding: 18px;
  border-radius: 14px;
  transition: 0.2s;
}

.card:hover {
  transform: translateY(-5px);
  background: #15233a;
}

.card h3 {
  margin-bottom: 6px;
}

.card p {
  color: #b7c3e0;
  font-size: 14px;
}

.card a {
  display: inline-block;
  margin-top: 10px;
  color: #7db2ff;
  text-decoration: none;
  font-weight: bold;
}

/* =====================================================
FOOTER
===================================================== */
footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: #0a1223;
  border-top: 1px solid #1f2a3a;
  text-align: center;
  padding: 10px;
  color: #b7c3e0;
  font-size: 13px;
}