:root {
  --bg-main: #121212;
  --bg-secondary: #181818;
  --bg-tertiary: #202020;

  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #777;

  --accent: #007bff;

  --border: #2a2a2a;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg-main);
  color: var(--text-primary);
  font-family: system-ui, sans-serif;
}

.main-div {
  max-width: 500px;
  justify-content: left;
  margin: 0 auto auto;
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

input {
  flex: 1;
  padding: 0.4rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 10px;
  border: 3px solid var(--border);
}

button {
  padding: 0.4rem 0.7rem;
  cursor: pointer;
  background: var(--accent);
  color: var(--text-primary);
  border-radius: 15px;
  border: 3px solid var(--border);
}

ul {
  list-style: none;
  padding: 0;
}

li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  border-bottom: 1px solid #ddd;
}

img {
  width: 18px;
  cursor: pointer;
}

.img-btn {
  align-self: center;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
}

.img-btn img {
  align-self: center;
  padding-top: 10%;
  width: 24px;
  height: 24px;
  filter: invert(1);
}