body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f4f4f4;
    color: #222;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    background: #ffffff;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

h1, h2 {
    text-align: center;
    color: #333;
}

form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

label {
    display: flex;
    flex-direction: column;
    font-weight: 500;
}

.checkbox-label {
    flex-direction: row;
    align-items: center;
    gap: 10px;
    font-weight: normal;
}

input[type="text"],
input[type="number"],
textarea {
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 8px;
    resize: none;
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

textarea {
    min-height: 40px;
    overflow: hidden;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: #666;
}

.item {
    display: grid;
    grid-template-columns: 2fr 3fr 1fr 1fr auto;
    gap: 10px;
    margin-bottom: 10px;
}

button {
    padding: 10px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#add {
    background-color: #e0e0e0;
    color: #333;
}

#add:hover {
    background-color: #d0d0d0;
}

.submit {
    background-color: #111;
    color: white;
}

.submit:hover {
    background-color: #000;
}

.remove {
    background: #ffdddd;
    color: #a00;
    padding: 0 10px;
    font-weight: bold;
    border-radius: 6px;
}

.remove:hover {
    background: #ffcccc;
}


#page {
  display: flex;
  flex-direction: row;
  min-height: 100vh;
  box-sizing: border-box;
}

#container {
  flex: 1;
  padding: 40px;
  box-sizing: border-box;
  max-width: 100%;
  overflow-x: hidden;
}

#file-sidebar {
  width: 250px;
  background-color: #f3f3f3;
  border-left: 1px solid #ddd;
  padding: 20px;
  box-sizing: border-box;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

#file-sidebar h3 {
  margin-top: 0;
  font-size: 1.2rem;
  text-align: center;
}

#file-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#file-sidebar li {
  margin-bottom: 10px;
}

#file-sidebar a {
  color: #333;
  text-decoration: none;
  display: block;
  padding: 6px 8px;
  border-radius: 4px;
  transition: background 0.2s ease;
}

#file-sidebar a:hover {
  background-color: #e0e0e0;
}

@media (max-width: 768px) {
  #file-sidebar {
    display: none;
  }
}

.file-button {
  width: 100%;
  padding: 8px 12px;
  margin: 4px 0;
  background-color: #ffffff;
  border: 1px solid #ccc;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  text-align: left;
  transition: background-color 0.2s;
}

.file-button:hover {
  background-color: #e8e8e8;
}