* {
  box-sizing: border-box;
}

::-webkit-scrollbar {
  width: 5px;
  height: 9px;
}

::-webkit-scrollbar-thumb {
  background: #444;
  border-radius: 5px;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #000;
  margin: 0;
  padding: 0;
  color: #ccc;
}

header {
  background: #1a1919;
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

header h1 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
}

main {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.search-bar {
  display: flex;
  max-width: 600px;
  margin: 0 auto 2rem auto;
  gap: 0.5rem;
}

.search-bar input {
flex: 1;
width: auto;
height: 40px;
padding: 0.75rem 1rem;
font-size: 1rem;
border: 1px solid #555;
border-radius: 8px;
background: #111;
color: #eee;
transition: border-color 0.2s, box-shadow 0.2s;
}

.search-bar input:focus {
outline: none;
border-color: #3f51b5;
box-shadow: 0 0 0 2px rgba(63, 81, 181, 0.3);
} 

.search-bar button {
width: 40px;
height: 40px;
padding: 0.75rem 1.25rem;
font-size: 1rem;
font-weight: 600;
background: linear-gradient(145deg, #3f51b5, #5c6bc0);
color: #fff;
border: none;
border-radius: 8px;
position: relative;
top: -0.5rem;
cursor: pointer;
transition: background 0.2s, transform 0.1s;
}

.search-bar button:hover {
    background: linear-gradient(145deg, #303f9f, #3f51b5);
  }
  
  .search-bar button:active {
    transform: scale(0.98);
  }
  
section {
  background: #1a1919;
  border-radius: 5px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.08);
  transition: box-shadow 0.3s ease;
}

section:hover {
  box-shadow: 0 4px 14px rgba(0,0,0,0.15);
}

h2 {
  color: #3f51b5;
  margin-top: 0;
  font-size: 1.4rem;
}

input[type="file"],
input[type="number"],
select,
textarea,
button {
  display: block;
  width: 100%;
  max-width: 600px;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: #000;
  color: #ccc;
  outline: none;
  border-radius: 5px;
  border: 1px solid #444;
  font-size: 1rem;
}

button:hover {
  background-color: #303f9f;
}

textarea {
  resize: vertical;
}

#unitResult {
  font-weight: bold;
  margin-top: 1rem;
}