body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f7fb;
    color: #1f2937;
}

header {
    background: #0f172a;
    color: white;
    padding: 18px 40px;
    position: sticky;
    top: 0;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 18px;
    font-size: 15px;
}

.hero {
    background: linear-gradient(to right, #0f172a, #1d4ed8);
    color: white;
    text-align: center;
    padding: 90px 20px;
}

.hero h1 {
    font-size: 52px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    max-width: 850px;
    margin: auto;
    line-height: 1.7;
}

.container {
    max-width: 1150px;
    margin: auto;
    padding: 50px 20px;
}

.card {
    background: white;
    padding: 35px;
    border-radius: 16px;
    margin-bottom: 28px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.feature-box {
    background: #f8fafc;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid #e2e8f0;
}

.btn {
    display: inline-block;
    margin-top: 15px;
    background: #2563eb;
    color: white;
    padding: 12px 18px;
    border-radius: 8px;
    text-decoration: none;
}

.btn:hover {
    background: #1d4ed8;
}

footer {
    background: #0f172a;
    color: white;
    padding: 35px 20px;
    text-align: center;
}

footer a {
    color: #93c5fd;
    text-decoration: none;
    margin: 0 10px;
}

h1, h2, h3 {
    color: #0f172a;
}

.hero h1, .hero p {
    color: white;
}

.date {
    color: #64748b;
    margin-bottom: 20px;
}

.highlight {
    color: #2563eb;
    font-weight: bold;
}