* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}

body {
    background: #1a1a2e;
}

.container {
    width: 100%;
    min-height: 100vh;
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.todo-app {
    width: 100%;
    max-width: 540px;
    background: #16213e;
    padding: 40px 30px 70px;
    border-radius: 10px;
    border: 1px solid #0f3460;
}

.todo-app h2 {
    color: #e94560;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #e0e0e0;
    border-radius: 30px;
    padding-left: 20px;
    margin-bottom: 25px;
}

input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    padding: 10px;
    font-weight: 14px;
}

button {
    border: none;
    outline: none;
    padding: 16px 50px;
    background: #e94560;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    border-radius: 40px;
}

ul li {
    list-style: none;
    font-size: 17px;
    padding: 12px 8px 12px 50px;
    user-select: none;
    cursor: pointer;
    position: relative;
    color: #fff;
}

ul li::before {
    content: '';
    position: absolute;
    height: 28px;
    width: 28px;
    border-radius: 50%;
    background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="%23555" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Ccircle cx="12" cy="12" r="10"%3E%3C/circle%3E%3C/svg%3E');
    background-size: cover;
    background-position: center;
    top: 8px;
    left: 8px;
}

ul li.checked {
    color: #888;
    text-decoration: line-through;
}

ul li.checked::before {
     background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M22 11.08V12a10 10 0 1 1-5.93-9.14"%3E%3C/path%3E%3Cpolyline points="22 4 12 14.01 9 11.01"%3E%3C/polyline%3E%3C/svg%3E');
     background-color: #e94560;
}

ul li span {
    position: absolute;
    right: 0;
    top: 5px;
    width: 40px;
    height: 40px;
    font-size: 22px;
    color: #fff;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
}

ul li span:hover {
    background: #2a3b64;
}